A hole sealing device for surveying a borehole

Abstract

The application discloses a hole sealing device for surveying drilling, and relates to the technical field of hole sealing devices for drilling. The hole sealing device comprises a sealing head, a storage cavity for storing water-stopping clay is arranged in the sealing head, a plurality of drainage holes communicating with the storage cavity are arranged on the outer side of the sealing head, one end of the sealing head is provided with a guide part, and the other end of the sealing head is provided with a connecting part. The sealing head is further provided with a sealing element. A flow guide element is provided with a flow guide channel, one end of the flow guide element is detachably connected to the connecting part, the other end of the flow guide element is provided with a limiting element, the flow guide channel communicates with the storage cavity, and one end of the flow guide element close to the connecting part is provided with a shunt hole communicating with the flow guide channel. A control element is arranged on the outer side of the flow guide element, and the control element is used for sealing the shunt hole. The hole sealing device for surveying drilling can effectively solve the problem of grouting leakage in the grouting and hole sealing process, and improves the hole sealing efficiency.

Description

Technical Field

[0001] This invention relates to the field of sealing devices for drilling, and particularly to a sealing device for exploration drilling. Background Technology

[0002] In limestone areas, karst caves are well-developed. After the exploration boreholes are completed, they need to be sealed. Without sealing, the boreholes become channels for groundwater flow. Driven by groundwater, the overlying soil flows through the boreholes into the karst caves, easily forming soil cavities. This makes exploration boreholes a significant factor in inducing soil cavities in engineering projects. Therefore, sealing the exploration boreholes is necessary. Current techniques often involve sealing with bags followed by grouting. The grouting method after sealing with bag-shaped plugs usually involves filling cement bags or burlap sacks with a certain amount of cement and shaping them into cylinders. These cylinders are then sent to the limestone surface using a drill rod to form a water-proof channel. Grouting is then performed on the cylinders, and once the grout has solidified, it severs the hydraulic connection between the upper overburden layer and the karst water, preventing the borehole from becoming a karst water channel. However, the bag-shaped plug head often falls into the karst cave due to deformation or uneven rock surfaces. Furthermore, the grout can easily flow into the karst cave along the contact surface, resulting in the failure to achieve the desired borehole sealing effect. Therefore, a borehole sealing device for exploration boreholes in limestone areas is needed. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, embodiments of the present invention provide a sealing device for exploration boreholes, which can effectively solve the problem of grout leakage during the grouting sealing process.

[0004] According to an embodiment of the present invention, a sealing device for exploration boreholes includes a sealing head, wherein the sealing head has a storage cavity for storing water-stopping clay, and a plurality of drainage holes communicating with the storage cavity are arranged on the outer side of the sealing head. One end of the sealing head has a guiding portion and the other end has a connecting portion. The sealing head also includes a sealing element; a flow guide having a flow channel, one end of the flow guide being detachably connected to the connecting portion, and the other end of the flow guide having a limiting element. The flow channel communicates with the storage cavity, and the end of the flow guide near the connecting portion has a diversion hole communicating with the flow channel; and a control element disposed on the outer side of the flow guide for sealing the diversion hole.

[0005] According to an embodiment of the present invention, a sealing device for exploration boreholes has drainage holes arranged in a circular array around the central axis of the sealing head, and a sealing element disposed between the guide portion and the drainage holes.

[0006] According to an embodiment of the present invention, the sealing device for exploration drilling has a circular bottom surface on one side of the sealing head where the connecting portion is provided. The edge of the circular bottom surface first extends in a direction parallel to the central axis of the sealing head to form a reference portion, and then extends in a direction intersecting the central axis of the sealing head to form a guide portion. The drainage hole is provided in the reference portion, and the sealing member is provided at the junction of the guide portion and the reference portion.

[0007] According to an embodiment of the present invention, a sealing device for borehole exploration is provided, wherein the sealing element is annular, the outer diameter of the sealing element is larger than the diameter of the borehole to be explored, and the sealing element is made of rubber.

[0008] According to an embodiment of the present invention, the sealing device for exploration drilling includes a connecting part that is a hollow tube. One end of the tube extends into the storage cavity, and the other end of the tube protrudes outside the sealing head. The end of the tube protruding outside the sealing head is threadedly connected to the guide member. The port of the end of the tube that extends into the storage cavity is located between the guide part and the drainage hole.

[0009] According to an embodiment of the present invention, a sealing device for drilling boreholes has a limiting boss on the inner side of the pipe for limiting the further penetration of the guide member.

[0010] According to an embodiment of the present invention, a sealing device for borehole drilling includes a control component comprising a first assembly, a second assembly, and multiple connecting components. The first assembly is sleeved on the outside of the flow guide and is clearance-fitted with the flow guide. The second assembly is sleeved on the outside of the flow guide. The first assembly is close to the diversion hole, and the second assembly is close to the limiting component. The first assembly and the second assembly are connected together by the multiple connecting components. An adjustment structure is provided between the second assembly and the flow guide, allowing the first assembly to move closer to or away from the connecting portion by rotating the second assembly.

[0011] According to an embodiment of the present invention, a sealing device for borehole exploration is provided with an external thread on the side of the guide member and an internal thread on the inner side of the second kit, wherein the external thread and the internal thread cooperate to form the adjustment structure.

[0012] According to an embodiment of the present invention, a sealing device for borehole drilling includes a limiting member comprising a sleeve fixedly connected to the flow guide member, and limiting rods extending outward from both sides of the sleeve, the extending direction of the limiting rods being perpendicular to the central axis of the flow guide member.

[0013] According to an embodiment of the present invention, the sealing device for drilling boreholes includes an extension rod as the limiting member. The limiting member is provided with a guide groove arranged along the length direction. The extension rod is disposed in the guide groove and is slidable. The limiting member is further provided with a locking member for restricting the sliding of the extension rod.

[0014] Based on the above technical solution, the embodiments of the present invention have at least the following beneficial effects: In the above technical solution, when performing borehole sealing operations for exploration drilling, the storage cavity of the sealing head is first filled with water-stopping clay, and then the guide component is connected to the connecting part. The limiting component and the control component are installed. At this time, the control component should block the diversion hole. Under the guidance of the guide part, the sealing head is sent into the designated position of the borehole. The limiting component fixes the entire sealing device to the rock wall on the outer edge of the borehole, thereby suspending the sealing head in the designated position of the borehole. Then, mud is injected from the guide channel. Since the diversion hole is blocked, the injected mud enters the storage cavity, and the injected mud is used to fill the storage cavity. The water-stopping clay is squeezed out from the drainage hole. Due to the presence of the sealing element, the water-stopping clay will not flow into the karst cave through the gap between the sealing head and the inner wall of the borehole. This allows the water-stopping clay to seal the gap between the sealing head and the inner wall of the borehole, effectively preventing the subsequent injection of mud into the karst cave. After the water-stopping clay solidifies, the control element is released from the diversion hole. At this time, the continued injection of mud flows into the borehole from the diversion hole and slowly fills the entire borehole, achieving sealing and filling from the inside out. This makes the injected mud more complete, greatly improving the sealing effect and effectively solving the problem of grout leakage during the grouting and sealing process, while also improving the sealing efficiency. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present invention. Figure 1 ;

[0017] Figure 2 This is a structural schematic diagram of an embodiment of the present invention. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of the control component in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the sealing head in an embodiment of the present invention. Detailed Implementation

[0020] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] Reference Figure 1 This invention provides a sealing device for exploration boreholes, specifically including a sealing head 100, a flow guide 310, and a control component 200.

[0025] Among them, such as Figure 4 As shown, the plugging head 100 has a storage cavity 104 for storing water-stopping clay. Multiple drainage holes 102 communicating with the storage cavity 104 are arranged on the outer side of the plugging head 100. One end of the plugging head 100 has a guide portion 101, which facilitates guiding the entire plugging head 100 to the designated position in the borehole to be explored. The other end of the plugging head 100 has a connecting portion 103. The plugging head 100 also has a sealing element 110, the diameter of which is larger than the diameter of the plugging head 100, so that after the plugging head 100 enters the designated position in the borehole, it forms a preliminary seal with the inner wall of the borehole. Figure 1 and Figure 2As shown, the guide member 310 has a flow channel. One end of the guide member 310 is detachably connected to the connecting part 103. When the existing guide member 310 cannot input the sealing head 100 to the designated position, a longer guide member 310 needs to be replaced. It should be noted that multiple guide members 310 of different lengths should be prepared according to the actual situation so that the sealing device can adapt to sealing holes at different positions. The other end of the guide member 310 is provided with a limiting member, which is used to fix the entire sealing device. Furthermore, the flow channel is connected to the storage cavity 104. The outer side of the end of the guide member 310 near the connecting part 103 has a diversion hole 313 that is connected to the flow channel. The control member 200 is provided on the outer side of the guide member 310 and is used to block the diversion hole 313.

[0026] In use, first fill the storage cavity 104 of the sealing head 100 with water-stopping clay, then connect the guide 310 to the connecting part 103. After the limiting part and control part 200 are installed, the control part 200 should block the diversion hole 313. Guided by the guide part 101, send the sealing head 100 into the designated position of the borehole. Fix the entire sealing device to the outer edge of the borehole side wall through the limiting part, thereby suspending the sealing head 100 in the designated position of the borehole. Then, inject mud from the guide channel. Since the diversion hole 313 is blocked, the injected mud enters the storage cavity 104, and the injected mud is used to fill the storage cavity 104. The water-stopping clay inside hole 04 is squeezed out from the drainage hole 102. Due to the presence of the sealing element 110, the water-stopping clay will not flow into the karst cave from the gap between the sealing head 100 and the inner wall of the borehole. This allows the water-stopping clay to seal the gap between the sealing head 100 and the inner wall of the borehole, thereby effectively preventing the subsequent injection of mud into the karst cave. After the water-stopping clay solidifies, the control element 200 is released from the blockage of the diversion hole 313. At this time, the continued injection of mud flows into the borehole from the diversion hole 313 and slowly fills the entire borehole, achieving sealing and filling from the inside out. This makes the injected mud more sufficient and greatly improves the sealing effect.

[0027] Among them, such as Figure 4 As shown, the drainage holes 102 are arranged in a circular array around the central axis of the sealing head 100 on the outer side of the sealing head 100. In this embodiment, there are a total of 12 drainage holes 102. The number of drainage holes 102 should be determined according to the size of the sealing head 100, and no further limitation is made here. The sealing element 110 is set between the guide part 101 and the drainage holes 102. The sealing element 110 is not sealed at the formation point, so that the injected water-stopping clay will not flow away from the gap between the sealing head 100 and the borehole to be explored, which facilitates the formation of a complete seal so that the subsequent grouting process is faster and more effective. The uniform distribution of the drainage holes 102 is conducive to the rapid and uniform dispersion of the water-stopping clay, and can also quickly fill the gap between the sealing head 100 and the borehole to be explored before the clay solidifies to form a sealing layer.

[0028] It should be noted that the hardness of the water-stopping clay should be adjusted according to actual needs, so that the mud can squeeze it out from the drainage hole 102. In addition, the amount of mud used to squeeze out the water-stopping clay should be controlled by the operator according to actual measurement, so that the mud will not squeeze the water-stopping clay out of the gap between the sealing head 100 and the inner wall of the borehole.

[0029] In some embodiments, such as Figure 4 As shown, the sealing head 100 has a circular bottom surface on the side where the connecting portion 103 is provided. The edge of the circular bottom surface first extends in a direction parallel to the central axis of the sealing head 100 to form a reference portion, and then extends in a direction intersecting the central axis of the sealing head 100 to form a guide portion 101. Specifically, the guide portion 101 is conical, the drainage hole 102 is provided in the reference portion, and the sealing member 110 is provided at the junction of the guide portion 101 and the reference portion. The sealing member 110 is annular, and the outer diameter of the sealing member 110 is larger than the diameter of the borehole to be explored, so that the sealing member 110 can seal the gap between the sealing head 100 and the inner wall of the borehole, and at the same time, it can play a certain role in obstructing the water-stopping clay, effectively preventing the water-stopping clay from falling into the sinkhole. Preferably, the sealing member 110 is made of rubber.

[0030] like Figure 4 As shown, the connecting part 103 is a hollow tube. One end of the tube extends into the storage cavity 104, and the other end of the tube is exposed on the outside of the sealing head 100. The end of the tube exposed on the outside of the sealing head 100 is connected to the guide 310 by a thread. The port of the end of the tube that extends into the storage cavity 104 is located between the guide part 101 and the drainage hole 102. The pipe fitting and the guide component 310 are connected by threads to facilitate quick disassembly and replacement of the plug head 100 and the guide component 310. The end of the pipe fitting that extends into the storage cavity 104 is located between the guide part 101 and the drainage hole 102. That is, when the entire device is placed vertically, the position of the end of the pipe fitting that extends into the storage cavity 104 is lower than the setting position of the drainage hole 102. After the storage cavity 104 is filled with water-stopping clay, the mud input from the guide channel enters the storage cavity 104 through the pipe fitting. The mud squeezes the water-stopping clay out from the drainage hole 102, so that the water-stopping clay first forms a sealing layer in the gap between the plug head 100 and the inner wall of the borehole.

[0031] Furthermore, the inner side of the pipe fitting is provided with a limiting boss 1031 to restrict the further insertion of the guide member 310. After the guide member 310 is screwed into the pipe fitting, the guide member 310 is confirmed to be installed in place by analyzing whether the guide member 310 hits the limiting boss 1031.

[0032] In other embodiments, such as Figure 3As shown, the control component 200 includes a first kit 210, a second kit 230, and multiple connecting parts 220. The first kit 210 is sleeved on the outside of the guide component 310 and is in clearance fit with the guide component 310. The second kit 230 is sleeved on the outside of the guide component 310. The first kit 210 is close to the diversion hole 313, and the second kit 230 is close to the limiting component 300. The first kit 210 and the second kit 230 are connected together by multiple connecting parts 220. In this embodiment, the connecting parts 220 are rods. An adjustment structure is provided between the second kit 230 and the guide component 310. By rotating the second kit 230, the first kit 210 can move closer to or away from the connecting part 103, thereby enabling the first kit 210 to block or release the blockage of the diversion hole 313. The second kit 230 is positioned close to the limiting component 300, which facilitates the rapid adjustment of the blocking state of the diversion hole 313 during the grouting process.

[0033] Specifically, the guide member 310 has an external thread 311 on its side, and the second assembly 230 has an internal thread 231 on its inner side. The external thread 311 and the internal thread 231 cooperate to form an adjustment structure. By turning the second assembly 230, the first assembly 210 can be driven to move to block the diversion hole 313 or to release the blockage of the diversion hole 313.

[0034] In some other embodiments, such as Figure 1 and Figure 2 As shown, the limiting component includes a sleeve 330 that is fixedly connected to the flow guide 310. Limiting rods 320 extend outward from both sides of the sleeve 330. The extension direction of the limiting rods 320 is perpendicular to the central axis of the flow guide 310. When the plugging head 100 enters the designated position, the limiting rods 320 are fixed to the rock wall on the outer edge of the borehole, thereby suspending the plugging head 100 in the designated position of the borehole. It should be noted that the sleeve 330 and the flow guide 310 are fixed together by a threaded connection. Furthermore, the limiting component also includes an extension rod 321. The limiting component 300 is provided with a guide groove arranged along the length direction. The extension rod 321 is located in the guide groove and can slide. The limiting component 300 is also provided with a locking component 322 for restricting the sliding of the extension rod 321. The extension rod 321 is also provided with a through hole 3211 through which the ground nail passes. The locking component 322 is threadedly connected to the limiting rod 320, and the threaded end of the locking component 322 can enter the guide groove to abut against the extension rod 321. In use, when the limiting rod 320 cannot find a suitable installation and fixing position on the side wall of the drilled hole, the extension rod 321 can be stretched to reach a position where the ground nail can be driven in. The locking component 322 is locked to restrict the sliding of the extension rod 321. After the ground nail passes through the through hole 3211 and is driven into the rock wall, the limiting component can be fixed to the rock wall.

[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A sealing device for exploration boreholes, characterized in that: include A sealing head (100) is provided with a storage cavity (104) for storing water-stopping clay. Multiple drainage holes (102) communicating with the storage cavity (104) are arranged on the outside of the sealing head (100). One end of the sealing head (100) has a guide part (101) and the other end has a connecting part (103). The sealing head (100) is also provided with a sealing element (110). The side of the sealing head (100) with the connecting part (103) is a circular bottom surface. The edge of the circular bottom surface first extends in a direction parallel to the central axis of the sealing head (100) to form a reference part, and then extends in a direction intersecting the central axis of the sealing head (100) to form the guide part (101). The drainage holes (102) are provided in the reference part, and the sealing element (110) is provided at the junction of the guide part (101) and the reference part. A flow guide (310) has a flow channel. One end of the flow guide (310) is detachably connected to the connecting part (103). The other end of the flow guide (310) is provided with a limiting member. The flow channel communicates with the storage cavity (104). The end of the flow guide (310) near the connecting part (103) has a diversion hole (313) communicating with the flow channel. The connecting part (103) is a hollow tube. One end of the tube extends into the storage cavity (104), and the other end of the tube is exposed outside the sealing head (100). The end of the tube exposed outside the sealing head (100) is connected to the flow guide (310) by a thread. The port of the tube extending into the storage cavity (104) is located between the guide part (101) and the drainage hole (102). A control component (200) is disposed on the outside of the flow guide (310). The control component (200) is used to block the diversion hole (313). The control component (200) includes a first kit (210), a second kit (230), and multiple connecting parts (220). The first kit (210) is sleeved on the outside of the flow guide (310) and has a clearance fit with the flow guide (310). The second kit (230) is sleeved on the outside of the flow guide (310). The first kit (210) is close to the diversion hole (313), and the second kit (230) is close to the limiting member (300). The first kit (210) and the second kit (230) are connected together by multiple connecting members (220). An adjustment structure is provided between the second kit (230) and the guide member (310). By rotating the second kit (230), the first kit (210) can move closer to or away from the connecting part (103).

2. The sealing device for exploration drilling according to claim 1, characterized in that: The drainage holes (102) are arranged in a circular array around the central axis of the sealing head (100) on the outside of the sealing head (100), and the sealing element (110) is disposed between the guide part (101) and the drainage holes (102).

3. The sealing device for exploration boreholes according to claim 1, characterized in that: The seal (110) is annular, and the outer diameter of the seal (110) is larger than the diameter of the borehole to be explored. The seal (110) is made of rubber.

4. The sealing device for exploration drilling according to claim 1, characterized in that: The inner side of the pipe fitting is provided with a limiting boss (1031) for limiting the further penetration of the guide (310).

5. The sealing device for exploration drilling according to claim 1, characterized in that: The guide (310) has an external thread (311) on its side, and the second kit (230) has an internal thread (231) on its inner side. The external thread (311) and the internal thread (231) cooperate to form the adjustment structure.

6. The sealing device for exploration boreholes according to claim 1, characterized in that: The limiting member includes a sleeve (330) that is fixedly connected to the guide member (310). Limiting rods (320) extend outward from both sides of the sleeve (330), and the extension direction of the limiting rods (320) is perpendicular to the central axis of the guide member (310).

7. The sealing device for exploration drilling according to claim 6, characterized in that: The limiting member also includes an extension rod (321). The limiting member (300) is provided with a guide groove arranged along the length direction. The extension rod (321) is provided in the guide groove and can slide. The limiting member (300) is also provided with a locking member (322) for restricting the sliding of the extension rod (321).

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