Multifunctional integrated hole sealing device

Abstract

The utility model relates to the technical field of gas extraction, specifically relates to a multifunctional integrated hole sealing device, including pipe body and connecting head, the inside pipe body is connected with the inner tube through first web, the connecting head includes first connecting head, second connecting head and third connecting head, the first through hole of first connecting head is fixed with set screw, the first through hole of second connecting head is equipped with check valve, the first through hole of third connecting head is equipped with blasting assembly, a plurality of pipe body outer wall interval uses pressure buckle assembly and is fixed with a group of bladder bag, the bladder bag covers several first connecting heads and at least one second connecting head, the pipe body between the bladder bag adopts several first connecting heads and at least one third connecting head connection, the utility model not only improves the success rate and stability of grouting hole sealing, but also integrates the functions of grouting hole sealing, water and slag blowing and gas extraction, effectively simplifies construction technology, improves the efficiency of gas extraction.

Description

Technical Field

[0001] This utility model relates to the field of gas extraction technology, specifically to a multifunctional integrated sealing device. Background Technology

[0002] With the increasing depth and intensity of coal mining in my country, the importance of coal mine safety has become increasingly prominent. Among the key technologies for coal mine safety, gas drainage is crucial for preventing gas disasters and realizing the resource utilization of gas. Underground gas drainage mainly relies on drilling holes in coal and rock strata, then connecting these holes to a drainage pipeline system to guide and extract the gas. The key to successful drainage lies in the quality of the hole sealing.

[0003] The sealing methods and technologies currently widely used in underground coal mines have significant shortcomings: (1) The construction is complicated and the efficiency is low. In the traditional underground gas extraction pipeline layout, after drilling is completed, a sealing pipe is first installed in the borehole, then a screen pipe is installed, and then the sealing device is installed on the sealing pipe to seal the borehole. Finally, the water blowing pipe is installed through the screen pipe to the bottom of the borehole. The construction steps are complicated, the operation efficiency is low, and the material cost is high. In addition, the depth of gas extraction boreholes is generally 50 to 200 meters. After drilling is completed, the drill rod needs to be pulled out and the pipeline device is inserted into the hole. During this process, the pipeline device may be blocked due to factors such as borehole collapse and borehole direction deviation, or it may not be able to be inserted to the bottom of the hole, which will seriously affect the blowing out of the water at the bottom of the hole and the subsequent gas extraction. (2) During the grouting and sealing process, due to the complex and ever-changing construction conditions and the uneven quality of construction personnel, the grouting pressure is often out of control. It is very easy for the sealing pipe to deform and break under the pressure of the grouting material due to excessive instantaneous pressure, which in turn leads to sealing failure. (3) Existing sealing devices often use metal buckles or clamps to fix the bladder. When using metal buckles, the clamping force is large, but because the clamping stroke is fixed, it will damage the pipe connected to the bladder when there are dimensional changes. When using clamps, the clamping force is moderate, but after the fixation is completed, the clamp and the bladder and sealing pipe are prone to relative sliding under the action of pressurized grout. (4) The burst valves used in the sealing devices on the market are all made of rubber. These burst valves have the advantages of simple structure and low cost, but they have poor weather resistance and are difficult to adapt to temperature changes. When the temperature rises, the burst pressure of the burst valve increases; when the temperature drops, the burst pressure of the burst valve will decrease, which will lead to sealing failure. (5) The one-way valve used in the existing sealing device is a single-sided fixed film covering the grout outlet. The specific working principle is that when the grout enters the bag, the single-sided fixed film covering the grout outlet is blown open and the bag is filled. After continuous pressurization, the burst valve opens. At this time, the grout pressure in the bag is higher than the pressure in the grouting pipe. The film covers the grout inlet and outlet with the grout flow to complete the blocking. During the closing process of the one-way valve, the position of the one-way valve film directly determines whether the one-way valve is effective. Once the angle between the film and the grout outlet exceeds 90°, the one-way valve loses its blocking function. Moreover, when the one-way valve is closed, the grout will definitely be lost, and the filling effect of the bag cannot be guaranteed. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a multifunctional integrated sealing device, which not only improves the stability of grouting and sealing but also integrates the functions of grouting and sealing, water blowing and slag blowing, and gas extraction, effectively improving the efficiency of gas extraction.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a multifunctional integrated sealing device, comprising a tube body and a connector, wherein an inner tube is connected to the inside of the tube body through a first rib plate, and a set of the first rib plates are symmetrically arranged; the inside of the tube body is divided into a first cavity and a second cavity by the first rib plate; the connector comprises a hollow column, which is inserted into the inner tube; a first positioning ring is connected to the outside of the hollow column through a second rib plate, and the second rib plate is correspondingly arranged to the first rib plate; a second positioning ring is provided on the inner wall of the first positioning ring, and a positioning groove is opened on the second positioning ring; the first rib plate is engaged with the positioning groove; a first through hole is opened on the first positioning ring; a connecting tube is provided between the hollow column and the second positioning ring, one end of the connecting tube communicating with the hollow column, and the other end passing through the second positioning ring and communicating with the first through hole of the first positioning ring; The connector includes a first connector, a second connector, and a third connector. A set screw is fixed in the first through hole of the first connector. A one-way valve is installed in the first through hole of the second connector. A bursting component is installed in the first through hole of the third connector. A set of bladders is fixed at intervals on the outer walls of the plurality of tubes. The bladders cover a plurality of first connectors and at least one second connector. The tubes between the bladders are connected by a plurality of first connectors and at least one third connector.

[0006] As a further embodiment of this utility model: the outer diameter of the first positioning ring is the same as that of the tube body, and the thickness of the first positioning ring is the same as that of the tube body, and the two ends of the second positioning ring extend out of the first positioning ring.

[0007] As a further improvement of this utility model: an annular groove is provided on the outer side of the hollow column, and a sealing ring is provided in the annular groove.

[0008] As a further improvement of this utility model, a limiting block is provided on the inner wall of the connecting pipe.

[0009] As a further improvement of this utility model: the one-way valve is a duckbill-shaped one-way valve, and a pressure plate is provided at the bottom of the one-way valve, and a plurality of second through holes are provided on the pressure plate.

[0010] As a further embodiment of this utility model: the blasting assembly includes an aluminum foil sheet and a hollow set screw, the aluminum foil sheet being disposed on the outside of the limiting block, and the hollow set screw being disposed on the outside of the aluminum foil sheet.

[0011] As a further embodiment of this utility model: the bladder and the tube are connected by a snap fastening assembly, the snap fastening assembly includes a T-shaped sleeve, the T-shaped sleeve is made of rubber and is bonded to the outside of the tube, and a limiting ring and a clamp are also fitted on the T-shaped sleeve.

[0012] As a further improvement of this utility model, the outer diameter of the tube body is smaller than the inner diameter of the drill rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The sealing device of this utility model integrates the functions of grouting sealing, water blowing and slag blowing and gas extraction, which changes the traditional process of using sealing pipe, sealing device, screen pipe and water blowing pipe together, reduces material cost and construction difficulty, and greatly improves work efficiency. 2. By setting a first stiffening plate inside the pipe, this utility model not only achieves the separation of the cavity, but also improves the compression resistance of the sealing device, ensuring that it is not squeezed and damaged by the grouting material during the grouting and sealing process, thus ensuring the stability of the grouting and sealing. 3. The one-way valve of this utility model adopts a duckbill type one-way valve, which solves the failure risk of the traditional one-way valve structure in the grouting and sealing process. At the same time, it solves the problem of grout loss in the bag after the blasting component is opened, thus ensuring the filling effect of the bag. 4. The blasting assembly of this utility model adopts aluminum foil and hollow set screw, which improves the adaptability of the blasting assembly to temperature changes. Furthermore, by setting aluminum foil of different thicknesses, the blasting pressure of the blasting assembly can be accurately controlled, thereby improving the fault tolerance rate of downhole grouting and sealing. 5. The snap fastening assembly of this utility model adopts the method of folding and fixing the edge of the bag. While ensuring that the tube body is not damaged by a large locking force, it increases the locking force of the clamp to fix the bag, effectively reduces the risk of the bag slipping off, and improves the success rate of grouting and sealing. 6. The sealing device of this utility model can be lowered into the bottom of the borehole through the inner hole of the drill rod, which directly solves the problem of difficulty in lowering the pipe or even the inability to lower it to the bottom of the borehole caused by borehole collapse, borehole direction deviation, etc. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a schematic diagram of the pipe fitting in this utility model; Figure 4 This is a schematic diagram of the internal structure of the connector in this utility model; Figure 5 This is a schematic diagram of the one-way valve in this utility model; Figure 6 This is an exploded structural diagram of the third connector in this utility model; Figure 7 This is a cross-sectional view of the snap fastener assembly in this utility model; In the diagram: 1. Pipe body; 2. Connector; 3. First stiffening plate; 4. Inner pipe; 5. First cavity; 6. Second cavity; 7. Hollow cylinder; 8. Second stiffening plate; 9. First positioning ring; 10. Second positioning ring; 11. Positioning groove; 12. First through hole; 13. Connecting pipe; 14. Set screw; 15. One-way valve; 16. Bursting assembly; 161. Aluminum foil sheet; 162. Hollow set screw; 17. Bag; 18. Annular groove; 19. Sealing ring; 20. Limiting block; 21. Press-fit assembly; 211. T-sleeve; 212. Limiting ring; 213. Clamp; 22. First connector; 23. Second connector; 24. Third connector; 25. Pressure plate; 26. Second through hole. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] refer to Figures 1 to 7A multifunctional integrated sealing device includes a tube body 1 and a connector 2. The tube body 1 is connected to an inner tube 4 through a first stiffener 3. A set of first stiffeners 3 are symmetrically arranged. The tube body 1 is divided into a first cavity 5 and a second cavity 6 by the first stiffeners 3. The connector 2 includes a hollow column 7, which is inserted into the inner tube 4. The outer side of the hollow column 7 is connected to a first positioning ring 9 through a second stiffener 8. The second stiffener 8 is correspondingly arranged with the first stiffener 3. The inner wall of the first positioning ring 9 is provided with a second positioning ring 10. The second positioning ring 10 has a positioning groove 11. The first stiffener 3 is engaged with the positioning groove 11. The first positioning ring 9 has a first through hole 12. A connecting tube 13 is provided between the hollow column 7 and the second positioning ring 10. One end of the connecting tube 13 is connected to the hollow column 7, and the other end passes through the second positioning ring 10 and is connected to the first through hole 12 of the first positioning ring 9. The connector 2 includes a first connector 22, a second connector 23, and a third connector 24. A set screw 14 is fixed in the first through hole 12 of the first connector 22. A one-way valve 15 is installed in the first through hole 12 of the second connector 23. A bursting component 16 is installed in the first through hole 12 of the third connector 24. A set of bags 17 are fixed at intervals on the outer wall of multiple tubes 1. The bags 17 cover several first connectors 22 and at least one second connector 23. The tubes 1 between the bags 17 are connected by several first connectors 22 and at least one third connector 24.

[0017] The outer diameter of the first positioning ring 9 is the same as that of the tube body 1, and the thickness of the first positioning ring 9 is the same as that of the tube body 1. The two ends of the second positioning ring 10 extend out of the first positioning ring 9.

[0018] An annular groove 18 is provided on the outer side of the hollow column 7, and a sealing ring 19 is provided in the annular groove 18.

[0019] The inner wall of the connecting pipe 13 is provided with a limiting block 20.

[0020] The one-way valve 15 is a duckbill-type one-way valve. The bottom of the one-way valve 15 is provided with a pressure plate 25, and the pressure plate 25 is provided with several second through holes 26.

[0021] The blasting assembly 16 includes an aluminum foil sheet 161 and a hollow set screw 162. The aluminum foil sheet 161 is located on the outside of the limiting block 20, and the hollow set screw 162 is located on the outside of the aluminum foil sheet 161.

[0022] The pouch 17 is connected to the tube body 1 by a snap fastening assembly 21. The snap fastening assembly 21 includes a T-shaped sleeve 211, which is made of rubber and is bonded to the outside of the tube body 1. A limiting ring 212 and a clamp 213 are also fitted on the T-shaped sleeve 211.

[0023] The outer diameter of tube 1 is smaller than the inner diameter of the drill pipe.

[0024] Working process: In this embodiment, the inner pipe of the tube body is used as the grouting channel, the first cavity is used as the input channel for positive pressure gas, and the second cavity is used as the output channel for water, coal slag, and gas. The following steps are included in its use: S1. After the drilling rig completes drilling, leave the drill rod inside the borehole; S2. Composition of sealing unit and bursting unit: The tubes are connected by several first connectors and at least one second connector, and a snap fastening assembly is installed at both ends of the connected tubes. Then, the two ends of the bag are passed through the limiting rings of the snap fastening assemblies at both ends and folded over. The limiting rings are moved to the cross arm of the T-shaped sleeve. The folded part of the bag, the limiting ring and the cross arm of the T-shaped sleeve are then tightly closed with a clamp to form a sealing unit. The hollow cylinder at one end of one sealing unit is fixed and sealed with a rubber plug. The pipes are connected by several first connectors and at least one third connector to form a blasting unit; both the sealing unit and the blasting unit can meet the length requirements by increasing the number of pipes and first connectors. S3. Assemble the pipe body to the required length through the first connector and insert it into the bottom of the borehole through the inner hole of the drill rod. Then, lower the sealing unit with the fixed seal and place the end with the fixed seal away from the borehole. Then, lower the blasting unit, the sealing unit without the fixed seal, and the connecting pipe body of the required length in sequence. Then, take out the drill rod and leave the formed pipeline in the borehole. S4. Using the inner tube in the pipeline formed by this device as the grouting pipe, the grout enters the inner tube and is injected into the bladder through the one-way valve. After the two bladders expand, they fit against the hole wall, so that the hole wall between the bladders and the outer wall of the tube form a ring-shaped sealing space. When grouting continues, the pressure in the hollow column of the third connector gradually increases, causing the aluminum foil in the rupture component to burst under the set pressure, thereby allowing the grout to enter the sealing space and begin to fill. The grout in the bladder, under the influence of the pressure difference, pushes the duckbill structure against the pressure plate to achieve one-way sealing. After the sealing space is filled, the sealing operation is completed. S5. After the borehole is sealed, connect the compressed air pipe in the roadway to the channel formed by the first cavity, and connect the gas drainage pipeline to the channel formed by the second cavity. During gas drainage operations, the gas enters the gas drainage pipeline through the channel formed by the second cavity under the negative pressure of the drainage. During water blowing and slag blowing operations, the positive pressure gas in the compressed air pipe reaches the bottom of the borehole through the channel formed by the first cavity, blowing the accumulated water and slag at the bottom of the borehole into the channel formed by the second cavity, and then discharges it through other devices on the gas drainage pipeline.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional integrated sealing device, comprising a tube body (1) and a connector (2), wherein an inner tube (4) is connected inside the tube body (1) via a first stiffener (3), characterized in that: The first stiffener (3) is symmetrically arranged in a set. The tube body (1) is divided into a first cavity (5) and a second cavity (6) by the first stiffener (3). The connector (2) includes a hollow column (7). The hollow column (7) is inserted into the inner tube (4). The outer side of the hollow column (7) is connected to a first positioning ring (9) by a second stiffener (8). The second stiffener (8) is correspondingly arranged with the first stiffener (3). The inner wall of the first positioning ring (9) is provided with a second positioning ring (10). The second positioning ring (10) is provided with a positioning groove (11). The first stiffener (3) is engaged with the positioning groove (11). The first positioning ring (9) is provided with a first through hole (12). A connecting pipe (13) is provided between the hollow column (7) and the second positioning ring (10). One end of the connecting pipe (13) is connected to the hollow column (7), and the other end passes through the second positioning ring (10) and is connected to the first through hole (12) of the first positioning ring (9). The connector (2) includes a first connector (22), a second connector (23) and a third connector (24). A set screw (14) is fixed in the first through hole (12) of the first connector (22). A one-way valve (15) is installed in the first through hole (12) of the second connector (23). A bursting assembly (16) is installed in the first through hole (12) of the third connector (24). A set of bags (17) is fixed at intervals on the outer wall of a plurality of tubes (1). The bags (17) cover a plurality of first connectors (22) and at least one second connector (23). The tubes (1) between the bags (17) are connected by a plurality of first connectors (22) and at least one third connector (24).

2. The multifunctional integrated sealing device according to claim 1, characterized in that: The outer diameter of the first positioning ring (9) is the same as that of the tube body (1), and the thickness of the first positioning ring (9) is the same as that of the tube body (1). The two ends of the second positioning ring (10) extend out of the first positioning ring (9).

3. The multifunctional integrated sealing device according to claim 2, characterized in that: The hollow column (7) has an annular groove (18) on its outer side, and a sealing ring (19) is provided in the annular groove (18).

4. The multifunctional integrated sealing device according to claim 3, characterized in that: The inner wall of the connecting pipe (13) is provided with a limiting block (20).

5. The multifunctional integrated sealing device according to claim 4, characterized in that: The one-way valve (15) is a duckbill type one-way valve. The bottom of the one-way valve (15) is provided with a pressure plate (25), and the pressure plate (25) is provided with several second through holes (26).

6. The multifunctional integrated sealing device according to claim 5, characterized in that: The blasting assembly (16) includes an aluminum foil sheet (161) and a hollow set screw (162). The aluminum foil sheet (161) is located on the outside of the limiting block (20), and the hollow set screw (162) is located on the outside of the aluminum foil sheet (161).

7. The multifunctional integrated sealing device according to claim 6, characterized in that: The bag (17) is connected to the tube body (1) by a snap fastening assembly (21). The snap fastening assembly (21) includes a T-shaped sleeve (211), which is made of rubber and is bonded to the outside of the tube body (1). A limiting ring (212) and a clamp (213) are also fitted on the T-shaped sleeve (211).

8. The multifunctional integrated sealing device according to claim 7, characterized in that: The outer diameter of the tube (1) is smaller than the inner diameter of the drill rod.

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