Borehole water expansion plugging and drainage device

Abstract

The present invention proposes a borehole water expansion plugging and drainage device, which belongs to the technical field of underground engineering borehole water prevention and control. The borehole water expansion plugging and drainage device includes a diversion pipe, a water pressure control valve, a drainage control valve, a drainage pipe and a connecting pipe; the upper and lower ends of the diversion pipe are both provided with end fasteners, the outer wall of the diversion pipe is provided with a plurality of fastening protrusions, the outer wall of the diversion pipe and between the two end fasteners are provided with a water-expandable rubber layer, the water-expandable rubber layer wraps the fastening protrusions, and the outer wall of the water-expandable rubber layer protrudes outward to form an anti-skid ridge, the lower end of the diversion pipe is connected to the water pressure control valve, the drainage control valve and the drainage pipe in sequence, and the water pressure control valve is connected to the drainage pipe through the connecting pipe; after closing the drainage control valve, when the water pressure of the diversion pipe is higher than the water pressure value set by the water pressure control valve, the water in the diversion pipe can flow to the drainage pipe through the connecting pipe. The beneficial effects of the present invention: it can realize the plugging and drainage of underground borehole water, and effectively treat the current underground coal mine borehole water problem.

Description

Technical Field

[0001] The invention relates to the technical field of underground engineering borehole water prevention and control, in particular to a borehole water expansion plugging and drainage device. Background Art

[0002] According to incomplete statistics, coal mine water damage is the second largest disaster in daily coal mine production, second only to underground gas accidents. Every year, coal mines across the country are affected by water damage to varying degrees, which has caused immeasurable losses to coal mine production safety and employee personal safety. As one of the important inducing factors of coal mine water damage, the management of underground borehole water in coal mines has gradually attracted great attention from relevant departments. The conventional management methods for underground borehole water in coal mines are "borehole plugging" and "borehole water diversion".

[0003] The materials used for borehole plugging are mainly cement rolls, kelp, hemp, steel pipes, logs, etc. There are many problems in the plugging process. The first is the applicability problem. When the borehole water flow is large, it is difficult or even impossible to plug it. The second is the borehole water pressure problem. Although the hole mouth is blocked, a water column will form inside the borehole to store water pressure. The borehole water will diffuse to the surrounding area under the action of pressure, and then flow out along the anchor rods, anchor cables and other supporting materials, which weakens the plugging effect and destroys the strength of the tunnel surrounding rock support body, posing a safety hazard.

[0004] Borehole water diversion is to place an iron or plastic inverted funnel directly outside the borehole, and then connect it to the centralized drainage area through a drainage pipe. There are two main problems. The first is the leakage problem. After the borehole water flows out, a large part of the water will diffuse along the roof, resulting in incomplete collection of the borehole water. The second is the standardization problem. In order to collect as much borehole water as possible, the equipment size is often required to be large enough, which increases the cost of relocation and hinders the standardization construction of coal mines. Summary of the invention

[0005] The purpose of the present invention is to provide a borehole water expansion plugging and drainage device to solve the technical problem that "the current conventional treatment methods such as borehole plugging and borehole water diversion in coal mines are difficult to treat".

[0006] The invention provides a borehole water expansion plugging and drainage device, comprising a guide pipe, a water pressure control valve, a drainage control valve, a drainage pipe and a connecting pipe; the upper end and the lower end of the guide pipe are both provided with end fasteners, the outer wall of the guide pipe is provided with a plurality of fastening protrusions, the outer wall of the guide pipe and between the two end fasteners are provided with a water-swelling rubber layer, the water-swelling rubber layer wraps the fastening protrusions, the outer wall of the water-swelling rubber layer protrudes outward to form an anti-skid edge, the lower end of the guide pipe is connected with the water pressure control valve, the drainage control valve and the drainage pipe in sequence, and the water pressure control valve is connected with the drainage pipe via the connecting pipe; after the drainage control valve is closed, when the water pressure of the guide pipe is higher than the water pressure value set by the water pressure control valve, the water in the guide pipe can flow to the drainage pipe via the connecting pipe.

[0007] Furthermore, the water-swellable rubber layer and the anti-slip ribs are both formed by winding water-swellable rubber strips.

[0008] Furthermore, the fastening protrusions are distributed in a scattered manner.

[0009] Furthermore, the anti-slip edges are arranged in a spiral shape.

[0010] Furthermore, the water pressure control valve includes a valve body, a pressure regulating thread, a pressure regulating nut, a pressure regulating ball and a pressure regulating spring. A guide channel and a guide cavity connected to the guide channel are provided in the valve body. One end of the guide channel is connected to the guide pipe. An internal thread is provided in the guide cavity. One end of the pressure regulating thread is threadedly connected to the guide cavity. The other end of the pressure regulating thread is connected to the communication pipe. The pressure regulating thread is threadedly connected to the pressure regulating nut. A pressure regulating ball is provided in the guide cavity and at the outlet of the other end of the guide channel. The pressure regulating ball can block the outlet of the other end of the guide channel. A pressure regulating spring is provided inside the pressure regulating thread. The end of the pressure regulating spring squeezes the pressure regulating ball to the outlet of the other end of the guide channel.

[0011] Furthermore, the drainage control valve, the drainage pipe and the communication pipe are connected via a tee.

[0012] Furthermore, the lower end of the guide pipe is respectively connected to the water pressure control valve and the drainage control valve via threads.

[0013] Furthermore, a compression spring is sleeved on the outer wall of the lower end of the guide tube, the lower end of the guide tube is connected to the upper end of the compression spring, and the lower end of the compression spring is connected to a hook via a rope.

[0014] Compared with the prior art, the borehole water expansion plugging and drainage device of the present invention has the following characteristics and advantages:

[0015] The borehole water expansion plugging and drainage device of the present invention can realize the sealing and drainage of underground borehole water, effectively solve the current borehole water problem in coal mines, and has reliable sealing and convenient drainage, breaking through the technical bottleneck of mine borehole water treatment; the device can be quickly installed, installed while drilling, and installed by one person, and the installation is quick and convenient, the construction operation time is short, and the cost is low; the device has the characteristics of pressure relief and anti-impact, and can meet the requirements of underground operations.

[0016] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, the characteristics and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of a borehole water expansion plugging and drainage device according to an embodiment of the present invention;

[0019] Figure 2 It is a partial cross-sectional view of a borehole water expansion plugging and drainage device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] like Figure 1 , Figure 2 As shown, this embodiment provides a borehole water expansion plugging and drainage device, including components such as a guide pipe 4, a water pressure control valve, a drainage control valve 12, a drainage pipe 16 and a communication pipe 15.

[0021] The upper end of the flow guide tube 4 ( Figure 1 The left end) and the bottom end ( Figure 1 The right end of the guide tube 4 is provided with an end fastener 5. The end fastener 5 is a sleeve-shaped structure, and the end fasteners 5 at both ends are used to clamp and fix the water-swellable rubber layer 1. The outer wall of the guide tube 4 is provided with a plurality of fastening protrusions 3, and the fastening protrusions 3 are scattered. The outer wall of the guide tube 4 and the water-swellable rubber layer 1 are provided between the two end fasteners 5. The water-swellable rubber layer 1 wraps the fastening protrusions 3. The fastening protrusions 3 distributed in a scattered manner make the guide tube 4 firmly connected to the water-swellable rubber layer 1, and avoid the misalignment and movement between the guide tube 4 and the water-swellable rubber layer 1 when the guide tube 4 is delivered into the borehole. The outer wall of the water-swellable rubber layer 1 protrudes outward to form an anti-skid ridge 2, and the anti-skid ridge 2 is arranged in a spiral shape. The water-swellable rubber layer 1 and the anti-skid ridge 2 are both formed by winding a water-swellable rubber strip. The thickness of the water-swellable rubber strip is not less than 10 mm, and the expansion rate is not less than 1.2. The spirally arranged anti-skid edges 2, on the one hand, can rotate the guide tube 4 to spirally drill the guide tube 4 and the water-swellable rubber layer 1 into the borehole together; on the other hand, after the water-swellable rubber layer 1 and the anti-skid edges 2 swell in water, the anti-skid edges 2 enhance the friction between the water-swellable rubber layer 1 and the inner wall of the borehole, so that the water-swellable rubber layer 1 is firmly fitted to the inner wall of the borehole.

[0022] The guide tube 4 and the water-swellable rubber layer 1 and the anti-skid edge 2 thereon can be set according to the size of the borehole to meet the needs of boreholes of different diameters, different inclinations and different depths. The size of the guide tube 16 can be adapted to the underground drainage pipeline.

[0023] The outer wall of the lower end of the flow guide pipe 4 is sleeved with a pressure-releasing spring 11, the lower end of the flow guide pipe 4 is connected to the upper end of the pressure-releasing spring 11, and the lower end of the pressure-releasing spring 11 is connected to a hook 14 via a steel strand 13. The hook 14 is hung on the supporting equipment (such as anchor rods, anchor nets, etc.) on the top plate, so that the borehole water expansion plugging and drainage device is in contact with the top plate through the pressure-releasing spring 11. When the top plate is under pressure, the pressure-releasing spring 11 is used for buffering, so that the device has the characteristics of pressure-releasing and anti-impact, which can meet the requirements of underground operations and improve the safety performance of the device.

[0024] The lower end of the flow guide pipe 4 is connected to the water pressure control valve, the drainage control valve 12 and the drainage pipe 16 in sequence, and the water pressure control valve is connected to the drainage pipe 16 via the connecting pipe 15. Among them, the lower end of the flow guide pipe 4 is connected to the water pressure control valve via a thread, and the lower end of the flow guide pipe 4 is connected to the drainage control valve via a thread, and the drainage control valve 12, the drainage pipe 16 and the connecting pipe 15 are connected via a tee 17. The flow guide pipe 4 is connected to the water pressure control valve and the drainage control valve 12 via a thread, so that the water pressure control valve, the drainage control valve 12, the connecting pipe 15, the drainage pipe 16, etc. can be reused, which effectively reduces the cost of borehole water treatment.

[0025] The water pressure control valve includes a valve body 6, a pressure regulating thread 8, a pressure regulating nut 7, a pressure regulating ball 9 and a pressure regulating spring 10. A flow guide channel 61 and a flow guide cavity 62 are provided in the valve body 6, and the flow guide channel 61 is connected with the flow guide cavity 62. One end of the flow guide channel 61 is connected with the flow guide pipe 4, and an internal thread is provided in the flow guide cavity 62. One end of the pressure regulating thread 8 is threadedly connected to the flow guide cavity 62, and the other end of the pressure regulating thread 8 is connected to the communication pipe 15. The pressure regulating thread 8 is threadedly connected to the pressure regulating nut 7. A pressure regulating ball 9 is provided in the flow guide cavity 62 and at the outlet of the other end of the flow guide channel 61. The cross-sectional size of the pressure regulating ball 9 is larger than the cross-sectional size of the outlet of the other end of the flow guide channel 61, and the pressure regulating ball 9 can block the outlet of the other end of the flow guide channel 61. A pressure regulating spring 10 is provided inside the pressure regulating thread 8, and the end of the pressure regulating spring 10 squeezes the pressure regulating ball 9 to the outlet of the other end of the flow guide channel 61.

[0026] The pressure regulating thread 8 is screwed in or out of the diversion cavity 62 to change the compression of the pressure regulating spring 10 and the pressure of the pressure regulating spring 10 on the pressure regulating ball, so as to set the water pressure value for the water pressure control valve according to the actual working conditions. After the water pressure value is set, the pressure regulating thread 8 is tightened by the pressure regulating nut 7 to lock the pressure regulating thread 8 in the diversion cavity 62. After the diversion control valve 12 is closed, when the water pressure of the diversion pipe 4 is higher than the water pressure value set by the water pressure control valve, the water in the diversion pipe 4 can flow to the diversion pipe 16 through the communication pipe 15.

[0027] The process of installing the borehole water expansion plugging drainage device of this embodiment to the borehole is as follows: open the drainage control valve 12, extend the diversion pipe 4 into the borehole, and the borehole water flows out through the diversion pipe 4, the drainage control valve 12, the three-way 17 and the drainage pipe 16 in sequence, and continues to flow to the centralized drainage through the pipeline. The drainage control valve 12 continues to remain open to form a drainage cycle to avoid the formation of a pressurized water column in the borehole. At the same time, the borehole water flows from the outside of the diversion pipe 4 through the end fastener 5 to the water-expandable rubber layer 1 to expand the water-expandable rubber layer 1 and the anti-skid rib 2. After the water-expandable rubber layer 1 and the anti-skid rib 2 expand to the set time and fully expand, the drainage control valve 12 is closed to achieve plugging. When the water pressure in the borehole (the water pressure of the diversion pipe 4) is higher than the water pressure value set by the water pressure control valve, the water in the diversion pipe 4 can flow to the drainage pipe 16 through the connecting pipe 15 to achieve overpressure protection of the borehole water and drainage, and continue to flow to the centralized drainage through the pipeline.

[0028] The borehole water expansion plugging and drainage device of this embodiment can achieve the plugging and drainage of underground borehole water, effectively treat the current underground borehole water problem in coal mines, and has reliable plugging and convenient drainage, breaking through the technical bottleneck of mine borehole water treatment. The device can be quickly installed, installed while drilling, and installed by one person. The installation is fast and convenient, the construction time is short, and the cost is low. The device has the characteristics of pressure relief and anti-bumping, which can meet the requirements of underground operations.

[0029] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A borehole water expansion plugging and drainage device, characterized in that: It comprises a guide pipe, a water pressure control valve, a drainage control valve, a drainage pipe and a connecting pipe; the upper and lower ends of the guide pipe are both provided with end fasteners, the outer wall of the guide pipe is provided with a plurality of fastening protrusions, the outer wall of the guide pipe and between the two end fasteners are provided with a water-swelling rubber layer, the water-swelling rubber layer wraps the fastening protrusions, the outer wall of the water-swelling rubber layer protrudes outward to form an anti-slip edge, the lower end of the guide pipe is connected to the water pressure control valve, the drainage control valve and the drainage pipe in sequence, and the water pressure control valve is connected to the drainage pipe via the connecting pipe; after the drainage control valve is closed, when the water pressure of the guide pipe is higher than the water pressure value set by the water pressure control valve, the water in the guide pipe can flow to the drainage pipe via the connecting pipe; The fastening protrusions are distributed in a scattered point shape; The water pressure control valve comprises a valve body, a pressure regulating thread, a pressure regulating nut, a pressure regulating ball and a pressure regulating spring. A flow guide channel and a flow guide cavity connected to the flow guide channel are provided in the valve body. One end of the flow guide channel is connected to the flow guide pipe. An internal thread is provided in the flow guide cavity. One end of the pressure regulating thread is threadedly connected to the flow guide cavity. The other end of the pressure regulating thread is connected to the communication pipe. The pressure regulating thread is threadedly connected to the pressure regulating nut. A pressure regulating ball is provided in the flow guide cavity and at the outlet of the other end of the flow guide channel. The pressure regulating ball can block the outlet of the other end of the flow guide channel. A pressure regulating spring is provided inside the pressure regulating thread. The end of the pressure regulating spring squeezes the pressure regulating ball to the outlet of the other end of the flow guide channel. The anti-skid edges are arranged in a spiral shape.

2. The borehole water expansion plugging and drainage device according to claim 1, characterized in that: The water-swelling rubber layer and the anti-skid edge are both formed by winding the water-swelling rubber strips.

3. The borehole water expansion plugging and drainage device according to claim 1, characterized in that: The drainage control valve, the drainage pipe and the communication pipe are connected via a tee.

4. The borehole water expansion plugging and drainage device according to claim 1, characterized in that: The lower end of the guide pipe is respectively connected to the water pressure control valve and the drainage control valve through threads.

5. The borehole water expansion plugging and drainage device according to claim 1, characterized in that: The outer wall of the lower end of the guide tube is sleeved with a pressure-releasing spring, the lower end of the guide tube is connected to the upper end of the pressure-releasing spring, and the lower end of the pressure-releasing spring is connected to a hook via a rope.

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