A quick hole sealing device for a top-cut pressure relief hole

Abstract

The utility model belongs to the technical field of cutting top pressure relief hole sealing technology, concretely is a kind of cutting top pressure relief hole quick sealing device. Including: shell, the shell can be inserted into pressure relief hole;Hollow tube, the through hole is arranged in hollow tube inside, and hollow tube is arranged in shell and can rotate;Sealing rubber gasket, the sealing rubber gasket is arranged in the front end of hollow tube and let hollow tube pass through from middle, and sealing rubber gasket periphery side is contacted with shell inner wall;Water-filled pouch, the water-filled pouch is arranged in shell front end, and the front end of water injection pipe is communicated, and the water injection pipe passes through the through hole arranged in hollow tube inside and is communicated with water source. The utility model belongs to effectively reduce labour intensity and improve operation safety. Groove design ensures that the device is inserted smoothly without obstruction, to avoid scratching hole wall.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of cutting top pressure relief hole sealing, specifically a kind of cutting top pressure relief hole fast sealing device. BACKGROUND

[0002] In the static force cutting top technology in underground coal mine, the pressure relief hole is as the key passage of ground stress dissipation, and its plugging quality is directly related to the gas extraction efficiency and the stability of surrounding rock. Unlike blasting cutting top, the static pressure relief hole has the characteristics of uniform aperture and low damage to hole wall, but the existing sealing technology still has the following adaptability problems: ‌Insufficient time efficiency of grouting sealing: when using cement-bentonite slurry, the initial setting time needs 45-60 minutes, which cannot match the rapid advancement requirement of hydraulic cutting top process; at the same time, the slurry penetration leads to the reduction of effective sealing length, causing the gas extraction blind area.

[0003] The current static force cutting top sealing process leads to the increase of ton coal cost, and the sealing operation may need secondary rework. Developing a sealing device that is suitable for low-damage hole wall, has long-term sealing and supports rapid installation has become the core supporting requirement of intelligent cutting top technology in coal mine. SUMMARY

[0004] The utility model discloses in order to solve above-mentioned problem, provide a kind of cutting top pressure relief hole fast sealing device.

[0005] The utility model discloses the following technical scheme is taken: a kind of cutting top pressure relief hole fast sealing device, comprising: Shell, the shell can be inserted into pressure relief hole; Hollow tube, the through hole is provided in the hollow tube, and the hollow tube is arranged in the shell and can rotate; Sealing rubber gasket, the sealing rubber gasket is arranged at the front end of hollow tube and lets hollow tube pass through from middle, and the peripheral side of sealing rubber gasket is in contact with the inner wall of shell; Water-filled pouch, the water-filled pouch is arranged at the front end of shell, and is communicated with the front end of water injection pipe, and the water injection pipe passes through the through hole in the hollow tube and is communicated with water source.

[0006] In some embodiments, it further includes hole-in fixing device, and the hole-in fixing device is used to fix the shell in pressure relief hole.

[0007] In some embodiments, hole-in fixing device includes: Multiple inner supports, the multiple inner supports are surrounded annularly; Multiple connecting rod assemblies, connecting rod assembly is one-to-one corresponding with inner support, one end of connecting rod assembly is hingedly connected with the inside of hollow tube, and the other end is hingedly connected with inner support, and after the rotation of hollow tube, connecting rod assembly changes from folded state to straight state, and inner support is braced outward.

[0008] In some embodiments, the hole-fixing device is provided with 2-3 groups from top to bottom.

[0009] In some embodiments, a groove is arranged on the outside of the shell, which is used to accommodate the inner support, ensuring smooth surface when the device is inserted into the pressure relief hole, avoiding scratching the hole wall.

[0010] In some embodiments, a plurality of rubber teeth are arranged on the outside of the inner support.

[0011] The front end of the shell is open, and a sealing rubber gasket is arranged in the cavity of the front end of the shell, the diameter of the sealing rubber gasket is greater than the inner diameter of the shell, and is not less than the diameter of the pressure relief hole.

[0012] The shell is provided with a strip-shaped through hole corresponding to the groove position, which is used to pass through the connecting rod assembly.

[0013] In some embodiments, a pressure sensor is arranged in the hollow tube, and an intelligent control valve is arranged on the water injection pipe, when the pressure sensor detects that the water filling bag pressure set threshold value, the intelligent control valve automatically closes the water injection.

[0014] Compared with the prior art, the utility model has the following beneficial effects: First, the construction efficiency and operation convenience are significantly improved. The device integrates the fixing and sealing actions in a single operation process through innovative linkage design. After inserting the hole, only rotating the hollow tube can drive two key functions: on the one hand, the sealing rubber gasket is pushed forward to expand, realizing the preliminary reliable sealing of the hole; on the other hand, the hole-fixing device is triggered to act, making the folded connecting rod assembly quickly straighten, stably pushing the inner support out of the groove and firmly abutting against the hole wall. This "one-turn double-control" mechanism completely simplifies the fixing and sealing operations that need to be performed step by step in the traditional hole sealing, greatly shortens the installation time, especially suitable for the working conditions with limited space and complex environment underground, effectively reduces the labor intensity and improves the operation safety. The groove design ensures smooth insertion of the device, avoiding scratching the hole wall.

[0015] Second, enhance the sealing reliability and long-term stability. The device adopts multiple security mechanisms to ensure the sealing effect is durable and effective. The water-filled bag expands in the hole to provide active sealing force, and its pressure is accurately managed by an intelligent control system: a pressure sensor monitors the water pressure in the bag in real time, and when the preset threshold is reached, the intelligent control valve automatically cuts off the water source, accurately preventing the bag from rupturing due to overpressure, and ensuring the integrity of the seal. At the same time, the multi-layer annular internal support structure of the hole fixing device (especially the rubber tooth pattern on the outside) generates strong radial support force after expansion, effectively resisting displacement caused by surrounding rock deformation or external disturbance, ensuring that the shell and sealing components are stable and do not loosen in the hole. The sealing rubber gasket and the water-filled bag form a complementary sealing barrier, the former provides immediate hole sealing, and the latter provides continuous inflation sealing inside the hole, significantly improving the reliability and adaptability of the overall sealing to uneven hole walls, effectively preventing gas or liquid leakage. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structure diagram of a fast hole sealing device for a top-cut pressure relief hole; Figure 2 is a schematic diagram of a fast hole sealing device for a top-cut pressure relief hole installed in a top-cut pressure relief hole; Figure 3 is a structure diagram of a hole fixing device; Figure 4 is a shell diagram; Figure 5 is a working process diagram; In the figure: 1 - water-filled bag, 2 - sealing rubber gasket, 3 - shell, 3.1 - strip-shaped through hole, 3.2 - cavity, 4 - groove, 5 - hole fixing device, 5.1 - internal support, 5.2 - linkage assembly, 6 - water injection pipe, 7 - hollow pipe. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0018] As shown in Figure 1 , 2 A fast hole sealing device for a top-cut pressure relief hole, comprising: A shell 3 that can be inserted into a pressure relief hole; A hollow pipe 7 with a through hole inside, which is arranged in the shell 3 and can rotate; A sealing rubber gasket 2 is provided at the front end of the hollow tube 7 and the hollow tube 7 passes through the middle. The periphery of the sealing rubber gasket 2 is in contact with the inner wall of the shell 3. A water-filled bag 1 is located at the front end of the shell 3 and is connected to the front end of the water injection pipe 6. The water injection pipe 6 passes through the hollow tube 7 and has a through hole to connect with the water source.

[0019] It also includes an internal fixing device 5, which is used to fix the housing 3 in the pressure relief hole.

[0020] like Figure 3 As shown, the internal fixing device 5 includes: Multiple inner supports 5.1, the multiple inner supports 5.1 forming a ring; Multiple connecting rod assemblies 5.2 correspond one-to-one with the inner support 5.1. One end of the connecting rod assembly 5.2 is hinged to the inside of the hollow tube 7, and the other end is hinged to the inner support 5.1. After the hollow tube 7 is rotated, the connecting rod assembly 5.2 changes from a folded state to a straight state, and the inner support 5.1 is pushed outward.

[0021] The internal support 5.1 is configured in four sets, with each internal support 5.1 being a quarter-circular arc structure. Two to three sets of fixing devices 5 are installed in the hole from top to bottom.

[0022] The outer side of the housing 3 is provided with a groove 4, which is used to accommodate the inner support 5.1, ensuring that the device maintains a smooth surface when inserted into the pressure relief hole and avoiding scratching the hole wall.

[0023] Specifically, the connecting rod assembly 5.2 is a double-link structure, with the two links hinged together. Initially, the two links are at an angle, and the inner support 5.1 is retracted within the groove 4. As the hollow tube 7 rotates, the link in the connecting rod assembly 5.2 that is hinged to the hollow tube 7 extends outward, and the two links gradually form a 180° angle. The connecting rod assembly 5.2 straightens, pushing the inner support 5.1 out of the groove 4, thus fixing the device within the pressure relief hole.

[0024] Specifically, the shell 3 is a cylindrical shell structure. The groove 4 divides the circular shell structure into multiple sections. A sealing rubber gasket 2 is placed in the cavity 3.2 at the front end of the shell 3, and an opening is provided at its front end. The diameter of the sealing rubber gasket 2 should be greater than the inner diameter of the shell 3 and not less than the diameter of the pressure relief hole.

[0025] A strip-shaped through hole 3.1 is provided at the groove 4 position corresponding to the housing 3, so that the connecting rod assembly 5.2 can pass through.

[0026] The inner support 5.1 has multiple rubber teeth on the outer side.

[0027] Specifically, during use, the water-filled bag 1 and the shell 3 are first inserted into the top pressure relief hole. The shell 3 has a cylindrical structure, and its shape is basically the same as that of the top pressure relief hole, but its diameter is slightly smaller than that of the top pressure relief hole, which can ensure that the shell 3 is fully inserted into the top pressure relief hole.

[0028] After the water-filled bag 1 and the shell 3 are installed in place, the hollow tube 7 is extended forward, and the sealing rubber gasket 2 extends out of the shell 3 along with the hollow tube 7. After the sealing rubber gasket 2 unfolds, it seals the pressure relief hole. Then, the hollow tube 7 is rotated. As the hollow tube 7 rotates, the connecting rod assembly 5.2 straightens, and the inner support 5.1 is pushed out by the connecting rod assembly 5.2. After the inner support 5.1 extends out of the groove 4, it contacts the pressure relief hole and forms a relatively stable contact connection, thereby fixing the whole in the pressure relief hole.

[0029] A pressure sensor is installed inside the hollow tube 7, and an intelligent control valve is installed on the water injection pipe 6. When the pressure sensor detects the pressure set threshold of the water-filled bag 1, the intelligent control valve automatically shuts off the water injection.

[0030] Specifically, after the entire assembly is fixed to the pressure relief hole, the intelligent control valve of the water injection pipe 6 is opened to fill the water-filled bag 1 with water. After the water-filled bag 1 is filled with water, it begins to seal the pressure relief hole. When the water-filled bag 1 is full of water, the water pressure will increase. The pressure sensor monitors the rise in water pressure in real time. When the water pressure rises to the threshold, the intelligent control valve receives a signal and automatically shuts off the water injection, thereby preventing the water-filled bag 1 from being overfilled and ruptured.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A quick sealing device for top-cutting and pressure-relief holes, characterized in that, include: The housing (3) can be inserted into the pressure relief hole; Hollow tube (7), the hollow tube (7) is provided with a through hole inside, the hollow tube (7) is set in the shell (3) and can rotate; A sealing rubber gasket (2) is provided at the front end of the hollow tube (7) and the hollow tube (7) passes through the middle. The periphery of the sealing rubber gasket (2) is in contact with the inner wall of the shell (3). A water-filled bag (1) is located at the front end of the shell (3) and is connected to the front end of the water injection pipe (6). The water injection pipe (6) passes through the hollow tube (7) and is connected to the water source through a through hole.

2. The quick sealing device for the top-cutting pressure relief hole according to claim 1, characterized in that, It also includes an internal fixing device (5) for fixing the housing (3) in the pressure relief hole.

3. The quick sealing device for the top-cutting pressure relief hole according to claim 2, characterized in that, The internal fixing device (5) includes: Multiple inner supports (5.1) are arranged in a ring; Multiple linkage assemblies (5.2) are connected one-to-one with the inner support (5.1). One end of the linkage assembly (5.2) is hinged to the inside of the hollow tube (7), and the other end is hinged to the inner support (5.1). After the hollow tube (7) is rotated, the linkage assembly (5.2) changes from a folded state to a straight state, and the inner support (5.1) is pushed outward.

4. The quick sealing device for the top-cutting and pressure-relieving hole according to claim 3, characterized in that, The hole fixing device (5) is set in 2-3 sets from top to bottom.

5. The quick sealing device for the top-cutting and pressure-relieving hole according to claim 3, characterized in that, The outer side of the housing (3) is provided with a groove (4) for accommodating the inner support (5.1) to ensure that the device maintains a smooth surface when inserted into the pressure relief hole and avoids scratching the hole wall.

6. The quick sealing device for the top-cutting and pressure-relieving hole according to claim 3, characterized in that, The inner support (5.1) has multiple rubber teeth on its outer side.

7. The quick sealing device for the top-cutting pressure relief hole according to claim 3, characterized in that, The front end of the housing (3) is open, and the cavity (3.2) at the front end of the housing (3) is used to set a sealing rubber gasket (2). The diameter of the sealing rubber gasket (2) is greater than the inner diameter of the housing (3) and not less than the diameter of the pressure relief hole.

8. The quick sealing device for the top-cutting and pressure-relieving hole according to claim 7, characterized in that, The housing (3) is provided with a strip-shaped through hole (3.1) at the corresponding groove (4) position, for the connecting rod assembly (5.2) to pass through.

9. The quick sealing device for the top-cutting and pressure-relief hole according to claim 1, characterized in that, A pressure sensor is installed inside the hollow tube (7), and an intelligent control valve is installed on the water injection pipe (6). When the pressure sensor (9) detects the pressure setting threshold of the water-filled bag (1), the intelligent control valve (10) automatically shuts off the water injection.

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