A fracture zone monitoring borehole sealing device

Abstract

This utility model discloses a borehole sealing device for monitoring fracture zones, belonging to the technical field of borehole sealing equipment. It includes a sealing mechanism comprising an electric drill, a hollow drill rod, a flexible hose, a transmission assembly, and a sealing sleeve. The transmission assembly includes a hollow venting shaft and a rotary joint. The output end of the electric drill is connected to the venting shaft, which is connected to the drill rod. The venting shaft is rotatably disposed inside the rotary joint, which is fixedly connected to the sealing sleeve. The sealing sleeve and the rotary joint enclose a sealed space, and the outlet end of the flexible hose is disposed within this sealed space. A discharge hole is provided on the peripheral wall of the venting shaft, and a liquid outlet pipe is provided inside the drill rod. The filling liquid is transported to the bottom of the drill rod through the sealed space, the discharge hole, and the liquid outlet pipe. This utility model, through the above structure, combines the drilling and grouting sealing processes into one, solving the problems of process separation, cumbersome operation, and easy borehole wall collapse in the prior art. It simplifies the construction process and significantly improves work efficiency and sealing quality.

Description

Technical Field

[0001] This utility model relates to the technical field of borehole sealing equipment, and in particular to a borehole sealing device for monitoring fracture zones. Background Technology

[0002] In the fields of mining, water conservancy and hydropower, and tunnel engineering, monitoring boreholes are usually drilled to effectively monitor and manage fracture zones inside rock masses. These boreholes need to be sealed in a timely and reliable manner after completing their monitoring mission or during the management process to prevent groundwater leakage, gas escape, or restore the overall stability of the rock mass. This is of great significance to ensuring the safety of the project.

[0003] Conventional methods for sealing these types of boreholes typically employ a step-by-step approach. First, workers use drilling equipment to drill the drill rod and drill bit to the predetermined depth of the fracture zone. After drilling is completed, the entire set of drilling tools needs to be completely pulled out of the borehole. Then, a dedicated grouting pipeline is lowered to the bottom of the borehole, and cement grout or chemical grout is injected into the fracture zone using ground pressurization equipment. Once the grout has solidified, the sealing is complete.

[0004] The aforementioned process of completely separating drilling and grouting has inherent defects, especially in fracture zones with complex geological conditions and relatively broken rock masses. When the drill bit is completely pulled out, the unsupported borehole wall is prone to collapse or falling off, which not only seriously affects the subsequent lowering of the grouting pipe, but may even lead to borehole blockage and scrapping. Even if the grouting pipe can be successfully lowered, the mixture of collapsed rock cuttings and filling grout will seriously affect the density and strength of the seal, thus leaving safety hazards. The two operations of raising and lowering the drill bit and lowering the grouting pipe also greatly reduce construction efficiency and increase time and labor costs.

[0005] Therefore, this utility model proposes a borehole sealing device for monitoring fracture zones to address the shortcomings of existing technologies. Utility Model Content

[0006] In view of the problems in the existing technology of fracture zone monitoring borehole sealing device, which separates the drilling and grouting sealing processes, and requires pulling out the drill rod and then lowering the grouting pipe after drilling, the operation is cumbersome and prone to causing borehole wall collapse, resulting in poor sealing quality, this utility model aims to provide a fracture zone monitoring borehole sealing device with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a borehole sealing device for monitoring fracture zones, including a sealing mechanism, which includes an electric drill, a hollow drill rod, and a flexible hose; as well as a transmission component and a sealing sleeve disposed within the sealing mechanism.

[0008] The transmission assembly includes a hollow shaft and a rotary joint.

[0009] Furthermore, the output end of the electric drill is fixedly connected to one end of the hollow grouting shaft, and the other end of the hollow grouting shaft is fixedly connected to the upper end of the hollow drill rod for transmitting drilling power. The bottom of the sealing sleeve is fixedly connected to the rotary joint, which surrounds the outside of the hollow grouting shaft, and the hollow grouting shaft can rotate relative to the rotary joint. The sealing sleeve and the rotary joint together form a sealed space, and the outlet end of the hose is located within this sealed space. At least one discharge hole is provided on the peripheral wall of the hollow grouting shaft, which connects the sealed space with the internal cavity of the hollow grouting shaft. A liquid outlet pipe is fixedly installed inside the hollow drill rod, and the upper end of the liquid outlet pipe is connected to the internal cavity of the hollow grouting shaft, thereby forming an integrated structure of drilling and grouting.

[0010] Preferably, the bottom of the hollow drill pipe is fixedly connected to a liquid outlet assembly, which includes a filling tube and an anti-clogging cone. The filling tube is connected to the lower end of the liquid outlet tube, and the anti-clogging cone is fixedly connected to the bottom opening of the filling tube to prevent blockage during drilling.

[0011] Furthermore, as a preferred embodiment, the filling tube has multiple radial grouting holes on its wall. The filling liquid diffuses radially around the hollow drill rod through these grouting holes to achieve uniform filling of the cracks.

[0012] Preferably, the outer surface of the hollow drill rod is integrally formed or fixedly connected with helical blades, which are used to assist in chip removal when the drill rod rotates, thereby improving drilling efficiency.

[0013] Preferably, the device further includes a liquid storage tank and a compressor. The liquid storage tank is used to store the filling liquid, and the compressor is disposed between the liquid storage tank and the hose for pressurizing the filling liquid and delivering it to the sealed space through the hose.

[0014] Preferably, the device further includes a quick-connect mechanism for realizing a quick and detachable connection between the hose and the sealing sleeve. The quick-connect mechanism includes a fixing ring fixedly connected to the end of the hose and a limiting cylinder fixedly connected to the outer wall of the sealing sleeve. A slider is fixedly connected to the surface of the fixing ring, and a groove is provided on the inner wall of the limiting cylinder for the slider to slide into. The end of the groove is connected to a circular groove for the slider to rotate and engage.

[0015] Furthermore, to ensure the sealing performance of the quick-connect mechanism, the quick-connect mechanism also includes a sealing gasket, which is disposed on the front end face of the fixed ring facing the limiting cylinder, providing a reliable fluid seal after the two are connected.

[0016] Preferably, the device further includes a telescopic mechanism, which includes a lifting rod, a fixing block fixed to the lifting rod, and a support block fixed to the bottom of the lifting rod. The fixing block is used to abut against the sealing mechanism to apply a downward axial force to the hollow drill rod, and the support block is used to support the electric drill and provide stable support.

[0017] Preferably, to facilitate overall movement, the device further includes a trolley, on which the sealing mechanism, the extension and retraction mechanism, and the liquid storage tank are all mounted, forming an integrated mobile operating platform.

[0018] This utility model has the following beneficial effects: 1. This utility model, by setting up a sealing mechanism that integrates a transmission component and a sealing sleeve, enables the hollow drill rod to deliver filling fluid through an internal fluid channel while rotating and drilling. This solves the problem in the prior art where drilling and grouting sealing processes are separated, requiring the drill rod to be pulled out and the grouting pipe to be lowered, which is cumbersome and prone to causing hole wall collapse. It achieves the goal of combining drilling and grouting sealing into one process, simplifying the construction process, significantly improving work efficiency, avoiding hole wall instability caused by pipe pulling, and ensuring the technical effect of sealing quality.

[0019] 2. This utility model solves the problems of inconvenient pipe connection and disassembly, and difficulty in timely cleaning of residual filling liquid after operation, which leads to pipe blockage and affects equipment life in the prior art. It achieves the technical effect of enabling quick disassembly and cleaning of hoses, effectively preventing pipe blockage, extending equipment life, and improving equipment maintenance convenience.

[0020] 3. This utility model solves the problem that rock cuttings, dust and other impurities easily clog the end outlet channel during the drilling process of the integrated drilling and grouting device by setting an anti-clogging cone on the liquid outlet component at the bottom of the drill rod. The anti-clogging cone is located at the bottom of the filling tube, which effectively protects the liquid outlet from being blocked during the drilling stage and ensures the smooth flow of the subsequent grouting channel, thereby improving the success rate and reliability of the sealing operation. Attached Figure Description

[0021] Figure 1 This is a perspective view of a borehole sealing device for monitoring fracture zones proposed in this utility model; Figure 2 This is a perspective view of the sealing mechanism of a borehole sealing device for monitoring fracture zones proposed in this utility model; Figure 3 This is a cross-sectional view of the sealing mechanism of a borehole sealing device for monitoring fracture zones proposed in this utility model; Figure 4This is an exploded view of the sealing mechanism of a borehole sealing device for monitoring fracture zones proposed in this utility model; Figure 5 for Figure 4 Enlarged view of point A; Figure 6 This is an exploded view of the quick-connect mechanism of a borehole sealing device for monitoring fracture zones proposed in this utility model.

[0022] Legend: 1. Trolley; 2. Sealing mechanism; 201. Electric drill; 202. Transmission assembly; 2021. Rotary joint; 2022. Leaking shaft; 203. Sealing sleeve; 204. Discharge hole; 205. Drill rod; 206. Liquid outlet pipe; 207. Liquid storage tank; 208. Compressor; 209. Liquid outlet assembly; 2091. Filling tube; 2092. Anti-clogging cone; 2010. Hoses; 3. Quick-connect mechanism; 301. Fixing ring; 302. Slider; 303. Slide groove; 304. Circular groove; 305. Sealing gasket; 306. Limiting cylinder; 4. Extension and reduction mechanism; 401. Lifting rod; 402. Fixing block; 403. Support block. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] Example: Please refer to Figures 1 to 6 This utility model provides a borehole sealing device for monitoring fracture zones, which aims to solve the problems in the prior art where the drilling and grouting sealing processes are separated, the operation is cumbersome, and the borehole wall collapse is likely to affect the sealing quality.

[0025] like Figure 1 As shown, a borehole sealing device for monitoring fracture zones includes a trolley 1, a sealing mechanism 2 and a telescopic mechanism 4 mounted on the trolley 1. The trolley 1 is used to carry and move the entire device, the sealing mechanism 2 is used to perform drilling and grouting sealing operations, and the telescopic mechanism 4 is used to assist the sealing mechanism 2 in performing drilling operations.

[0026] Reference Figure 2 , Figure 3 and Figure 4The sealing mechanism 2 includes an electric drill 201, a transmission assembly 202, a sealing sleeve 203, and a hollow drill rod 205. A hose 2010 for conveying filling fluid is connected to the sealing mechanism 2. The transmission assembly 202 is located between the electric drill 201 and the drill rod 205. The transmission assembly 202 includes a hollow drain shaft 2022 and a rotary joint 2021. The output end of the electric drill 201 is fixedly connected to one end of the drain shaft 2022, and the other end of the drain shaft 2022 is fixedly connected to the upper end of the drill rod 205. This structure enables the transmission of the rotational power of the electric drill 201 to the drill rod 205. The bottom of the sealing sleeve 203 is fixedly connected to the rotary joint 2021. 21 surrounds the outside of the drain shaft 2022, and the drain shaft 2022 can rotate relative to the rotary joint 2021. The sealing sleeve 203 and the rotary joint 2021 together form a sealed space. The outlet end of the hose 2010 is located inside the sealed space. At least one discharge hole 204 is provided on the peripheral wall of the drain shaft 2022. The discharge hole 204 is used to introduce the filling liquid from the sealed space into the interior of the drain shaft 2022. The drill rod 205 is fixedly provided with a liquid outlet pipe 206. The upper end of the liquid outlet pipe 206 is connected to the internal cavity of the drain shaft 2022, thereby constructing a fluid channel that can deliver the filling liquid while the drill rod 205 rotates.

[0027] Please refer to Figure 4 and Figure 5 A fluid outlet assembly 209 is fixedly connected to the bottom of drill rod 205. The fluid outlet assembly 209 includes a filling tube 2091 and an anti-clogging cone 2092. The upper end of the filling tube 2091 is connected to the lower end of the fluid outlet tube 206 to receive filling fluid from the outlet tube 206. The anti-clogging cone 2092 is fixedly connected to the bottom opening of the filling tube 2091. Multiple radial grouting holes are formed on the wall of the filling tube 2091. The conical structure of the anti-clogging cone 2092 effectively pushes away rock cuttings and dust during the downward drilling process of drill rod 205, preventing… The grouting holes are prevented from becoming blocked, while the grouting holes on the filling pipe 2091 ensure that the filling fluid can diffuse evenly from the bottom of the drill rod 205 to the radial periphery, achieving effective filling of the cracks. To further improve work efficiency, the outer surface of the drill rod 205 is also integrally formed or fixedly connected with spiral blades for improving drilling efficiency. This design, which integrates the anti-blocking structure, diffusion grouting structure and high-efficiency drilling structure at the end of the drill rod 205, ensures that the device can immediately carry out high-quality sealing operations without any additional operations after drilling is completed.

[0028] As a preferred embodiment, to provide stable and controllable filling fluid pressure, please refer to... Figure 1The device also includes a liquid storage tank 207 and a compressor 208. The liquid storage tank 207 is used to store the filling liquid, and the compressor 208 is located between the liquid storage tank 207 and the hose 2010. Specifically, the liquid storage tank 207 is connected to the input end of the compressor 208 through a pipeline, and the output end of the compressor 208 is connected to the hose 2010. The compressor 208 is used to pressurize the filling liquid in the liquid storage tank 207 and then deliver it to the sealing mechanism 2 through the hose 2010.

[0029] As another preferred embodiment, to facilitate quick on-site disassembly, assembly, and cleaning of the pipeline, refer to Figure 6 The hose 2010 and the sealing mechanism 2 are connected by a quick-connect mechanism 3. The quick-connect mechanism 3 includes a fixing ring 301 fixedly connected to the end of the hose 2010 and a limiting cylinder 306 fixedly connected to the outer wall of the sealing sleeve 203. A slider 302 is fixedly connected to the surface of the fixing ring 301. A groove 303 is provided on the inner wall of the limiting cylinder 306 for the slider 302 to slide into. The end of the groove 303 is connected to a circular groove 304. During installation, the slider 302 is pushed into the groove 303 to the bottom, and then the fixing ring 301 is rotated to make the slider 302 enter the circular groove 304 to achieve quick locking. In order to ensure the sealing of the connection, the quick-connect mechanism 3 also includes a sealing gasket 305. The sealing gasket 305 is arranged around the front end face of the fixing ring 301 facing the limiting cylinder 306, providing a reliable liquid seal after the two are connected.

[0030] As another preferred embodiment, in order to provide auxiliary downforce and stable support during drilling, refer to Figure 1 The device also includes a lifting mechanism 4, which includes a lifting rod 401, a fixing block 402 fixed on the lifting rod 401, and a support block 403 fixed to the bottom of the lifting rod 401. The fixing block 402 is used to abut against the sealing mechanism 2. By operating the lifting rod 401, a downward axial force is applied to the drill rod 205. The support block 403 is used to support the electric drill 201 and provide stable vertical support for the entire sealing mechanism 2. The entire sealing mechanism 2, the lifting mechanism 4, and the liquid storage tank 207 are all installed on the trolley 1, which makes the entire device highly mobile and easy to transfer between different work positions.

[0031] Working principle: When sealing drilled holes in fracture zones, the entire device is first pushed to the designated position using trolley 1. Then, the electric drill 201 is started. The output end of the electric drill 201 is connected to the drain shaft 2022, which rotates within the rotary joint 2021. The bottom of the rotary joint 2021 is fixedly connected to the bottom of the sealing sleeve 203, so the rotary joint 2021 does not rotate with the drain shaft 2022. The transmission assembly 202 allows the electric drill 201 to drive only the drain shaft 2022 to rotate, avoiding the influence of rotation on the soft... The service life of tube 2010 is extended. Multiple discharge holes 204 are opened in the drain shaft 2022. Multiple liquid storage tanks 207 are also opened inside the drill rod 205, corresponding to the drill rod 205. The drill rod 205 uses special blades on its surface to speed up the drilling time. After drilling is completed, a downward force is required during drilling. At this time, the extension and lowering mechanism 4 is activated. When the extension and lowering mechanism 4 is activated, the lifting rod 401 drives the fixed block 402 to descend, pushing the drill rod 205 downward. The bottom of the lifting rod 401 is fixedly connected to the support block 403. The support block 403 supports the electric drill 201. The compressor 208 is started, and filling liquid is drawn from the storage tank 207 through the hose 2010. After being compressed by the compressor 208, the liquid enters the hose 2010 from the top, flows along the pipe into the interior of the sealing sleeve 203, and the front end of the hose 2010 passes through the rotary joint 2021. The filling liquid then falls onto the surface of the drain shaft 2022. Because a discharge hole 204 is opened on the surface, the filling liquid flows down through the discharge hole 204 and into the discharge assembly 209 along the discharge pipe 206. The filling tube 2091 is fixedly connected to the bottom of the drill rod 205 and has holes around its bottom. The filling liquid spreads outward along the holes to fill the gap. Because the filling tube 2091 is prone to clogging during the drilling stage, an anti-clogging cone 2092 is connected to the bottom to effectively prevent dust from clogging the filling tube 2091. After filling, the compressor 208 is turned off and the drill rod 205 is pulled out to complete the sealing. The sealing mechanism 2 solves the problem that the drill rod 205 cannot be pulled out after drilling before sealing. Furthermore, a large amount of filling fluid will remain inside the hose 2010 after the sealing process is completed. If not cleaned in time, it will cause blockage and affect the service life of the equipment. Therefore, a quick-connect mechanism 3 is used in the connection process between the hose 2010 and the equipment to enable quick connection. A fixing ring 301 is fixedly connected to one end of the hose 2010, and a slider 302 is fixedly connected to the surface of the fixing ring 301. A limiting cylinder 306 is fixedly connected to one end of the equipment. A sliding groove 303 is opened inside the limiting cylinder 306. The slider 302 can slide inside the sliding groove 303. After sliding to the front end of the sliding groove 303, the fixing ring 301 is rotated to make the slider 302 enter the interior of the circular groove 304 to achieve quick closure. Since the filling fluid is liquid, a sealing gasket 305 is set at the front end of the fixing ring 301 to prevent liquid leakage and maintain the seal. The quick-connect mechanism 3 enables the hose 2010 to be quickly installed and removed. After the sealing is completed, the hose 2010 can be quickly removed for cleaning, which increases the service life of the hose 2010.

Claims

1. A borehole plugging device for monitoring fracture zones, comprising a plugging mechanism (2), the plugging mechanism (2) comprising an electric drill (201), a hollow drill rod (205), and a hose (2010) for conveying filling fluid. characterized in that The sealing mechanism (2) further includes a transmission assembly (202) and a sealing sleeve (203). The transmission assembly (202) includes a hollow drain shaft (2022) and a rotary joint (2021). The output end of the electric drill (201) is fixedly connected to one end of the drain shaft (2022), and the other end of the drain shaft (2022) is fixedly connected to the upper end of the drill rod (205). The bottom of the sealing sleeve (203) is fixedly connected to the rotary joint (2021). The rotary joint (2021) surrounds the outside of the drain shaft (2022), and the drain shaft (2022) can rotate relative to the rotary joint (2021). The sealing sleeve (203) and the rotary joint (2021) together form a sealed space. The outlet end of the hose (2010) is located within the sealed space. At least one discharge hole (204) is provided on the peripheral wall of the drain shaft (2022). The discharge hole (204) is used to introduce the filling liquid from the sealed space into the interior of the drain shaft (2022). A liquid outlet pipe (206) is fixedly provided inside the drill rod (205). The upper end of the liquid outlet pipe (206) is connected to the internal cavity of the drain shaft (2022).

2. A fracture zone monitoring borehole sealing device according to claim 1, characterized in that The bottom of the drill pipe (205) is fixedly connected to a liquid outlet assembly (209). The liquid outlet assembly (209) includes a filling tube (2091) and an anti-clogging cone (2092). The filling tube (2091) is connected to the lower end of the liquid outlet pipe (206), and the anti-clogging cone (2092) is fixedly connected to the bottom opening of the filling tube (2091).

3. A fracture zone monitoring borehole sealing device according to claim 2, characterised in that, The filling tube (2091) has multiple radial grouting holes on its wall for diffusing the filling liquid to the radial periphery of the drill rod (205).

4. The borehole sealing device for monitoring fracture zones according to claim 1, characterized in that, The outer surface of the drill rod (205) is integrally formed or fixedly connected with helical blades for improving drilling efficiency.

5. A fracture zone monitoring borehole sealing device according to claim 1, wherein, The device also includes a storage tank (207) and a compressor (208). The storage tank (207) is used to store filling liquid, and the compressor (208) is disposed between the storage tank (207) and the hose (2010) for pressurizing and delivering the filling liquid.

6. A fracture zone monitoring borehole sealing apparatus according to claim 1, wherein, The device further includes a quick-connect mechanism (3), which includes a fixing ring (301) fixedly connected to the end of the hose (2010) and a limiting cylinder (306) fixedly connected to the outer wall of the sealing sleeve (203). A slider (302) is fixedly connected to the surface of the fixing ring (301). A groove (303) is provided on the inner wall of the limiting cylinder (306) for the slider (302) to slide into. The end of the groove (303) is connected to a circular groove (304) for the slider (302) to rotate and be engaged.

7. A fracture zone monitoring borehole sealing device according to claim 6, wherein, The quick-connect mechanism (3) also includes a sealing gasket (305), which is arranged around the front end face of the fixing ring (301) facing the limiting cylinder (306) to achieve a seal after the two are connected.

8. A fracture zone monitoring borehole sealing apparatus according to claim 1, wherein, The device also includes a lifting mechanism (4), which includes a lifting rod (401), a fixing block (402) fixed on the lifting rod (401), and a support block (403) fixed to the bottom of the lifting rod (401). The fixing block (402) is used to abut against the sealing mechanism (2) to apply a downward axial force to the drill rod (205), and the support block (403) is used to support the electric drill (201).

9. A borehole sealing device for monitoring fracture zones according to claim 1, characterized in that, The device also includes a trolley (1), and the sealing mechanism (2) and the extension mechanism (4) are both mounted on the trolley (1) with a liquid storage tank (207).

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