Downhole rapid expansion sealing wall and using method

Abstract

The invention relates to the technical field of underground roadway sealing walls, in particular to an underground rapid expansion sealing wall and a using method thereof.The underground rapid expansion sealing wall comprises a foldable framework, the foldable framework comprises a plurality of support units hinged to one another, and the support units are connected to a roadway through anchoring assemblies; the rapid expansion assembly comprises a main air bag group and an air inlet mechanism; the gap compensation assembly comprises an attaching mechanism and a compensation mechanism; the self-adaptive compensation assembly comprises a mounting box, a pressurizing mechanism, a magnetic attraction connecting mechanism and a pressure releasing mechanism; according to the self-adaptive compensation assembly, excess pressure in a roadway is used for pressurization through the pressurization mechanism, automatic flow division is achieved through the pressure relief mechanism when the air pressure exceeds the limit, air bags are prevented from being overloaded and broken, and the reliability of pressurization and air flow communication of the main air bag set is ensured through the magnetic attraction connecting mechanism; and the sealing wall still has good sealing performance after being used for a long time.

Description

Technical Field

[0001] This invention relates to the field of underground tunnel sealing wall technology, specifically to an underground rapid expansion sealing wall and its application method. Background Art

[0002] my country's coal mines are primarily underground, requiring the excavation of numerous roadways. After the coal at the working face within these roadways is mined, the remaining coal in the goaf needs to be sealed to prevent air leakage and spontaneous combustion, and to suppress the release of gas from the goaf into other roadways. Existing sealing walls are constructed using a stacking method, which cannot respond quickly to changes in the underground environment or meet safety requirements in emergency situations.

[0003] To address this technical problem, patent application number "CN201510136207.6" discloses a rapid-expansion sealing wall for wells, comprising several air barriers and inflatable airbags. An escape door is located on the leftmost air barrier, with one side integrated with the air barrier and the other three sides connected via double-sided zippers. Reflective markings are affixed to both sides of the escape door, which is also symmetrically equipped with round-hair hook and loop fasteners and barbed hook and loop fasteners. The inflatable airbag includes an inner layer of air... The system consists of an inner and outer airbag, with the inner airbag connected to the surrounding air barrier. The outer airbag is connected to the inner airbag, and the interiors of the outer and inner airbags are connected via a one-way pressure relief valve. Both the inner and outer airbags are divided into multiple interconnected but not interconnected units, separated by one-way pressure relief valves or sealed partitions. The inner airbag is equipped with inflatable support columns, each symmetrically fitted with a fixed lifting lug. When installing the rapid-expansion sealing wall, simply hook one end of the expansion bolt with a hook onto the fixed lifting lug. This invention enables rapid and effective separation of underground roadways.

[0004] However, the above-mentioned rapid expansion sealing wall in the well still has the following obvious disadvantages when used: during the rapid expansion, airflow input and gap filling process, the unevenness of the roadway wall causes gaps between the traditional airbag and the rock wall, which often leads to uneven expansion and poor sealing, which can easily cause gas leakage or system failure. Summary of the Invention

[0005] The purpose of this invention is to provide a downhole rapid expansion sealing wall and its usage method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: On the one hand, a downhole rapid expansion sealing wall is provided, comprising: A foldable frame, comprising several interconnected support units, wherein the support units are connected to the tunnel via anchoring components; A rapid expansion assembly, comprising a main airbag assembly and an air intake mechanism, wherein the main airbag assembly is used to seal off a roadway, and the air intake mechanism is used to input airflow into the main airbag assembly to inflate it. A gap compensation component, comprising a bonding mechanism and a compensation mechanism, wherein the bonding mechanism is used to drive the compensation mechanism to bond to the roadway, and the compensation mechanism is used to fill the gap; An adaptive compensation component includes a mounting box, a pressurizing mechanism, a magnetic connection mechanism, and a depressurization mechanism. The mounting box is used to install the pressurizing mechanism, which uses airflow in the tunnel to pressurize the main airbag assembly. The magnetic connection mechanism connects the pressurizing mechanism and the main airbag assembly during installation of the mounting box. The depressurization mechanism inputs airflow from the main airbag assembly into the compensation mechanism after the air pressure in the main airbag assembly reaches a set value.

[0007] Preferably, the support unit has mounting holes, the anchoring assembly includes fixing bolts, the fixing bolts are used to install the support unit in the roadway, and the support units are connected to each other by fixing pins.

[0008] Preferably, the main airbag assembly includes several compressible airbag units that are interconnected, and the air intake mechanism includes a one-way air intake valve connected to one of the compressible airbag units.

[0009] Preferably, the compensation mechanism includes a compensation airbag group, which is disposed on the support unit, and adjacent compensation airbag groups are interconnected.

[0010] Preferably, the fitting mechanism includes a disc spring and a flexible plate, and the anchoring assembly further includes a telescopic sleeve. The disc spring is disposed inside the compensation airbag assembly, and the top end of the disc spring is connected to the flexible plate. One side of the flexible plate is located outside the compensation airbag assembly. The telescopic sleeve passes through the disc spring and is disposed therethrough. Both ends of the telescopic sleeve are respectively connected to the support unit and the flexible plate.

[0011] Preferably, the compressible airbag unit equipped with the one-way intake valve has a mounting slot, the one-way intake valve is disposed in the mounting slot, the pressurization mechanism includes a manifold, a turbine rotor, a drive shaft, a drive disc, a connecting rod, a piston rod, and a cylinder, the mounting box is inserted into the mounting slot, the manifold is disposed in the mounting box, the mounting box is provided with an air chamber, the manifold is used to introduce airflow into the air chamber, the turbine rotor is disposed in the air chamber, the turbine rotor is connected to the drive disc through the drive shaft, the drive disc is hinged to the connecting rod, the end of the connecting rod is connected to the piston rod, the piston rod is connected to the cylinder, and the magnetic connection mechanism is used to connect the cylinder to the one-way intake valve.

[0012] Preferably, the magnetic connection mechanism includes a magnetic ring, a sealing ring, a connecting pipe, and a magnetic opening valve. The magnetic ring is disposed at the air inlet end of the one-way air inlet valve, the sealing ring is disposed inside the magnetic ring, the connecting pipe is disposed at the exhaust port of the cylinder, and the magnetic opening valve is connected to the connecting pipe.

[0013] Preferably, the pressure relief mechanism includes a pressure relief valve, which is disposed at the connection between the main airbag assembly and the compensation airbag assembly.

[0014] Preferably, the compensation airbag assembly is equipped with a pressure opening valve.

[0015] On the other hand, a method of use is provided for using the above-mentioned downhole rapid expansion sealing wall, comprising the following steps: A. Connect the support units in the foldable skeleton to form a frame structure that matches the cross-section of the roadway, and install the support units in the roadway through the anchoring components. B. Connect the external air pump to the air intake mechanism, start the air source to inflate the main airbag assembly, so that the main airbag assembly expands along the foldable frame until the fitting mechanism is tightly fitted to the roadway wall to form a sealing layer. C. Install the booster assembly by placing the mounting box in the mounting slot. At this time, the magnetic connection mechanism will automatically attract the one-way intake valve of the main airbag assembly.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The split structure of the foldable frame in this application supports folding transportation. After unfolding, it is quickly fixed by the anchoring component. Combined with the instant inflation of the main airbag group, it is suitable for the rapid sealing needs of emergency scenarios such as mine fires and gas leaks. When in use, the foldable frame can adaptively unfold according to the shape of the tunnel cross section. The fitting mechanism drives the compensation mechanism to dynamically fill the irregular surface gaps. At the same time, combined with the flexible expansion characteristics of the main airbag group, it achieves efficient sealing of complex tunnels. The adaptive compensation component uses the residual pressure in the tunnel to increase the pressure through the pressurization mechanism. The depressurization mechanism automatically diverts the air when the air pressure exceeds the limit to avoid the airbag overload rupture. The magnetic connection mechanism ensures the reliability of the airflow communication between the pressurization and the main airbag group. Combined with the secondary filling of the gap compensation mechanism, the sealed wall still has good sealing performance after long-term use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 (The mounting box on one side is omitted); Figure 3 This is a schematic diagram of the exploded structure of the present invention; Figure 4 This is a schematic diagram of the connection structure between the main airbag assembly and the pressure relief valve of the present invention; Figure 5 This is a schematic diagram of the explosion structure of the compensation airbag assembly, disc spring, and flexible plate of the present invention; Figure 6 This is a schematic diagram of the connection structure between the compensation airbag assembly and the pressure opening valve of the present invention; Figure 7 This is a schematic diagram of the connection structure between the disc spring and the telescopic sleeve of the present invention (the disc spring is shown in cross-section). Figure 8 This is a schematic diagram of the connection structure between the mounting box, the shroud, and the turbine rotor of the present invention. Figure 9 This is a schematic diagram of the connection structure between the mounting box and the one-way intake valve of the present invention; Figure 10 This is a schematic diagram of the internal structure of the mounting box of the present invention; Figure 11 This is a three-dimensional structural schematic diagram of the booster mechanism of the present invention (explosive view of the connection between the magnetic opening valve, the magnetic ring and the one-way intake valve). Figure 12 This is a schematic diagram of the connection structure between the magnetic ring and the sealing ring of the present invention.

[0018] In the diagram: 1. Support unit, 2. Compressible airbag unit, 3. Mounting box, 4. Fixing bolt, 5. Fixing pin, 6. One-way air intake valve, 7. Compensating airbag assembly, 8. Disc spring, 9. Flexible plate, 10. Telescopic sleeve, 11. Mounting groove, 12. Manifold, 13. Turbine rotor, 14. Drive shaft, 15. Drive disc, 16. Connecting rod, 17. Piston rod, 18. Cylinder, 19. Magnetic ring, 20. Sealing ring, 21. Connecting pipe, 22. Magnetic opening valve, 23. Pressure relief valve, 24. Pressure opening valve. Detailed Implementation

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Please see Figure 1-12 The present invention provides a technical solution: A type of downhole rapid expansion sealing wall, as shown in the instruction manual. Figure 1 As shown, it includes: The foldable frame includes several interconnected support units 1. The foldable frame composed of multiple support units 1 is easy to store. The support units 1 are fixedly connected to the tunnel through anchoring components. In order to ensure airtightness, the shape of the top support unit 1 can be set according to the trend of the tunnel roof (e.g., set as a straight structure or an arch structure). The rapid expansion assembly includes a main airbag group and an air intake mechanism. The internal material of each compressible airbag unit 2 in the main airbag group is nitrile rubber, which has a certain resistance to materials such as gas, mine water containing sulfates and chlorides, and machine oil used on the equipment, and is suitable for the application scenarios of this application. At the same time, the external material of the main airbag group is an aramid fiber composite layer. The aramid fiber composite layer is a fiber structure used to resist scratches caused by sharp rock blocks (such as roof debris falling in the tunnel) and extend the service life of the main airbag group. The compensation airbag group 7 is made of the same material as the main airbag group. The main airbag group is used to seal the tunnel, and the air intake mechanism is used to input airflow into the main airbag group to make it expand. The gap compensation component includes a bonding mechanism and a compensation mechanism. The bonding mechanism is used to drive the compensation mechanism to bond to the roadway, and the compensation mechanism is used to fill the gap. The adaptive compensation component includes a mounting box 3, a pressurizing mechanism, a magnetic connection mechanism, and a depressurization mechanism. The mounting box 3 is used to install the pressurizing mechanism, which uses the airflow in the tunnel to pressurize the main airbag assembly. The magnetic connection mechanism is used to connect the pressurizing mechanism and the main airbag assembly when the mounting box 3 is installed. The depressurization mechanism is used to input the airflow in the main airbag assembly into the compensation mechanism after the air pressure in the main airbag assembly reaches the set value.

[0021] The support unit 1 has four symmetrical mounting holes on both sides. The anchoring assembly includes fixing bolts 4, which are used to fix the support unit 1 to the roadway roof. The support units 1 are connected to each other by fixing pins 5.

[0022] The main airbag assembly includes several compressible airbag units 2, which are interconnected. The air intake mechanism includes a one-way air intake valve 6, which is connected to one of the compressible airbag units 2. The compressible airbag unit 2 is provided with a mounting groove 11.

[0023] The compensation mechanism includes a compensation airbag group 7. The size of the compensation airbag group 7 can be adapted to the size of the corresponding support unit 1. The compensation airbag group 7 is used to fill the gap between the support unit 1 and the roadway roof. The compensation airbag group 7 is set in the support unit 1. Adjacent compensation airbag groups 7 are connected to each other through pipes to achieve the effect of rapid inflation.

[0024] The bonding mechanism includes a disc spring 8 and a flexible plate 9. The disc spring 8 is used to drive the flexible plate 9 to bond with the roof of the tunnel. The anchoring assembly also includes a telescopic sleeve 10. The telescopic sleeve 10 can move with the movement of the flexible plate 9 to ensure the fixing effect. The disc spring 8 is set inside the compensating airbag assembly 7. The top of the disc spring 8 is fixedly connected to the flexible plate 9. One side of the flexible plate 9 is located outside the compensating airbag assembly 7. The telescopic sleeve 10 is set through the disc spring 8. The two ends of the telescopic sleeve 10 are respectively connected to the support unit 1 and the flexible plate 9. The telescopic sleeve 10 is used to install the fixing bolt 4.

[0025] A one-way intake valve 6 is installed in the mounting slot 11, which is used to install the turbine rotor 13. The booster mechanism includes a flow collector 12, a turbine rotor 13, a drive shaft 14, a drive disc 15, a connecting rod 16, a piston rod 17, and a cylinder 18. During use, the mounting box 3 is inserted into the mounting slot 11, and the flow collector 12 is installed in the mounting box 3. The mounting slot 11 is located on the windward side of the sealed wall. The flow collector 12 guides the airflow direction, thereby concentrating the airflow impacting the wall in the tunnel and inputting the airflow into the air chamber. Box 3 is provided with an air chamber, and turbine rotor 13 is disposed in the air chamber. Turbine rotor 13 is connected to drive shaft 14. One end of drive shaft 14 is connected to the air chamber, and the other end of drive shaft 14 is connected to drive disc 15. Drive disc 15 is hinged to connecting rod 16. Connecting rod 16 is used for transmission. Piston rod 17 is connected to the end of connecting rod 16. Piston rod 17 is used to input gas into compressible airbag unit 2 through cylinder 18. Piston rod 17 is connected to cylinder 18. Magnetic connection mechanism is used to connect cylinder 18 to one-way air intake valve 6.

[0026] The magnetic connection mechanism includes a magnetic ring 19, a sealing ring 20, a connecting pipe 21, and a magnetic opening valve 22. The magnetic ring 19 is located at the air inlet of the one-way air inlet valve 6 and is used to open the magnetic opening valve 22 by magnetic force. The sealing ring 20 is located inside the magnetic ring 19 and is used to ensure sealing performance during transmission. The connecting pipe 21 is located at the exhaust port of the cylinder 18 and is used to install the magnetic opening valve 22. The magnetic opening valve 22 is connected to the connecting pipe 21.

[0027] The pressure relief mechanism includes a pressure relief valve 23, which is used to input airflow into the compensation airbag group 7 after the pressure of the compressible airbag unit 2 of the main airbag group reaches a set value. The pressure relief valve 23 is located at the connection between the main airbag group and the compensation airbag group 7.

[0028] The compensation airbag assembly 7 is equipped with a pressure opening valve 24, which is used to release the air inside the compensation airbag assembly 7 when the pressure inside the compensation airbag assembly 7 exceeds a set value.

[0029] Working principle: During use, the support unit 1 is fixedly installed around the roadway using fixing bolts 4. Then, the air inlet of the external air pump is connected to the one-way air inlet valve 6. Air enters the compressible airbag unit 2 of the main airbag assembly through the one-way air inlet valve 6 and inflates it. After the pressure in the compressible airbag unit 2 reaches the set value, the pressure relief valve 23 opens, thereby introducing air into the compensation airbag assembly 7. The compensation airbag assembly 7 fills the gap between the support unit 1 and the roadway roof. After inflation and sealing are completed (the opening of the pressure relief valve 23 indicates that inflation and sealing are complete), the mounting box 3 is inserted into the mounting box. In slot 11, when the mounting box 3 is inserted, the magnetic opening valve 22 will dock with the magnetic ring 19. At this time, the magnetic opening valve 22 will open. During subsequent use, when ventilation is carried out in the tunnel, the airflow in the tunnel will continuously impact the sealing cavity. Some of the air that impacts the sealing wall will enter the middle of the air cavity through the shroud 12 and drive the turbine rotor 13 to rotate. When the turbine rotor 13 rotates, it will drive the transmission disc 15 to rotate, which will drive the piston rod 17 to reciprocate in the cylinder 18 through the connecting rod 16. Through the above process, air is continuously replenished to the compensation airbag group 7 and the main airbag group to ensure the long-term sealing of the sealing wall.

[0030] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rapid-expansion sealing wall for downhole drilling, characterized in that, include: A foldable frame, comprising several interconnected support units, wherein the support units are connected to the tunnel via anchoring components; A rapid expansion assembly, comprising a main airbag assembly and an air intake mechanism, wherein the main airbag assembly is used to seal off a roadway, and the air intake mechanism is used to input airflow into the main airbag assembly to inflate it. A gap compensation component, comprising a bonding mechanism and a compensation mechanism, wherein the bonding mechanism is used to drive the compensation mechanism to bond to the roadway, and the compensation mechanism is used to fill the gap; An adaptive compensation component includes a mounting box, a pressurizing mechanism, a magnetic connection mechanism, and a depressurization mechanism. The mounting box is used to install the pressurizing mechanism, which uses airflow in the tunnel to pressurize the main airbag assembly. The magnetic connection mechanism connects the pressurizing mechanism and the main airbag assembly during installation of the mounting box. The depressurization mechanism inputs airflow from the main airbag assembly into the compensation mechanism after the air pressure in the main airbag assembly reaches a set value.

2. The downhole rapid expansion sealing wall according to claim 1, characterized in that: The support unit has mounting holes, and the anchoring assembly includes fixing bolts. The fixing bolts are used to install the support unit in the tunnel, and the support units are connected to each other by fixing pins.

3. The downhole rapid expansion sealing wall according to claim 1, characterized in that: The main airbag assembly includes several compressible airbag units, which are interconnected. The air intake mechanism includes a one-way air intake valve, which is connected to one of the compressible airbag units.

4. The downhole rapid expansion sealing wall according to claim 2, characterized in that: The compensation mechanism includes a compensation airbag assembly, which is disposed on the support unit, and adjacent compensation airbag assemblies are interconnected.

5. The downhole rapid expansion sealing wall according to claim 4, characterized in that: The fitting mechanism includes a disc spring and a flexible plate. The anchoring assembly also includes a telescopic sleeve. The disc spring is disposed inside the compensation airbag assembly. The top of the disc spring is connected to the flexible plate. One side of the flexible plate is located outside the compensation airbag assembly. The telescopic sleeve passes through the disc spring and is disposed therethrough. Both ends of the telescopic sleeve are respectively connected to the support unit and the flexible plate.

6. The downhole rapid expansion sealing wall according to claim 3, characterized in that: The compressible airbag unit equipped with the one-way intake valve has a mounting slot. The one-way intake valve is located in the mounting slot. The pressurization mechanism includes a shroud, a turbine rotor, a drive shaft, a drive disc, a connecting rod, a piston rod, and a cylinder. The mounting box is inserted into the mounting slot. The shroud is located in the mounting box and has an air chamber. The shroud is used to introduce airflow into the air chamber. The turbine rotor is located in the air chamber. The turbine rotor is connected to the drive disc via the drive shaft. The drive disc is hinged to the connecting rod. The end of the connecting rod is connected to the piston rod. The piston rod is connected to the cylinder. The magnetic connection mechanism is used to connect the cylinder to the one-way intake valve.

7. A downhole rapid expansion sealing wall according to claim 6, characterized in that: The magnetic connection mechanism includes a magnetic ring, a sealing ring, a connecting pipe, and a magnetic opening valve. The magnetic ring is located at the air inlet end of the one-way air inlet valve, the sealing ring is located inside the magnetic ring, the connecting pipe is located at the exhaust port of the cylinder, and the magnetic opening valve is connected to the connecting pipe.

8. A downhole rapid expansion sealing wall according to claim 4, characterized in that: The pressure relief mechanism includes a pressure relief valve, which is located at the connection between the main airbag assembly and the compensation airbag assembly.

9. A downhole rapid expansion sealing wall according to claim 8, characterized in that: The compensation airbag assembly is equipped with a pressure opening valve.

10. A method of use for employing the downhole rapid expansion sealing wall according to any one of claims 1 to 8, characterized in that, Includes the following steps: A. Connect the support units in the foldable skeleton to form a frame structure that matches the cross-section of the roadway, and install the support units in the roadway through the anchoring components. B. Connect the external air pump to the air intake mechanism, start the air source to inflate the main airbag assembly, so that the main airbag assembly expands along the foldable frame until the fitting mechanism is tightly fitted to the roadway wall to form a sealing layer. C. Install the booster assembly by placing the mounting box in the mounting slot. At this time, the magnetic connection mechanism will automatically attract the one-way intake valve of the main airbag assembly.

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