Drilling hole plugging device

Abstract

The utility model discloses a drilling hole plugging device, and relates to the technical field of exploration drilling hole plugging, the drilling hole plugging device comprises a column body and a filling groove formed in the circumferential side wall of the column body, the filling groove is filled with an expansion water stop piece, one end of the column body is fixedly connected with a connecting piece and is provided with a plurality of positioning pieces, and the connecting piece is provided with a left-hand threaded hole; the plurality of positioning pieces are arranged at intervals around the axis of the column body; the positioning piece comprises a rotating part rotationally connected to the column body and a clamping part arranged on the rotating part, one end of the clamping part extends in the direction away from the axis of the rotating part, and when the rotating part rotates, the clamping part can slide out of the circumferential side wall of the column body. The connecting piece is connected to the column body, the left-hand threaded hole in threaded connection with the drill bit is formed in the connecting piece, damage to the column body due to the fact that the left-hand threaded hole is formed in the column body is reduced, and the positioning pieces are arranged on the column body at intervals and rotationally connected with the column body.

Description

Technical Field

[0001] The present application relates to the technical field of exploration borehole plugging, and in particular to a borehole plugging device. Background Art

[0002] With the rapid development of urban construction, a large number of deep foundation pits or underground tunnels are under construction in cities. Before construction, engineering geological exploration must be carried out to obtain deep geological data. Common methods include pit exploration, geophysical exploration, drilling, etc. Among them, the construction boreholes produced by drilling may cause changes in the seepage channels of groundwater. If they are not blocked, the lower pressurized water will surge upward along the holes during the subsequent foundation pit construction, causing foundation pit surges; it may also occur in the underground section of rail transit when shield construction is used, and the shield machine will synchronously grout slurry from the borehole. Therefore, cement slurry is generally injected for sealing after the borehole is used. In actual situations, due to factors such as temperature and groundwater, cement particles in cement slurry may precipitate or flow, resulting in unstable consolidation quality of cement slurry and affecting the sealing effect, so foundation pit surges and other situations still occur from time to time.

[0003] A Chinese patent with publication number CN214944149U discloses a device for quickly plugging water gushing from a borehole, comprising a cylindrical plugging column, an assembly groove being arranged around the outer circumference of the plugging column, the assembly groove being filled with a water-expandable body flush with the surface of the plugging column, and a reverse thread coaxially arranged at one end of the plugging column for cooperating with a drill bit.

[0004] Compared with using cement slurry alone for sealing, the application of the above-mentioned plugging device in the borehole can avoid the influence of poor cement slurry consolidation quality on the borehole sealing effect. However, due to the different environments in boreholes with different geological conditions, the requirements for the depth of the borehole where the plugging column is located are also different. The expansion material will increase the resistance of the plugging column to move downward in the borehole if it swells too early when it encounters water. Therefore, the selection of the expansion material will also change. Usually, a material with a relatively slow expansion reaction speed is selected. After the expansion column moves down to the required position, it gradually expands until it is close to the hole wall.

[0005] However, there is a certain time interval between the expansion of the expansive material and its adhesion to the hole wall. During this period, the friction between the column and the hole wall is not sufficient to stabilize its own position. Under the influence of factors such as gravity, the depth of the column in the borehole may change. If the column falls again in the borehole, for example, the pressurized aquifer is not completely blocked, subsequent drilling may still experience sudden surges, so improvement is needed. Utility Model Content

[0006] In order to enable the sealing column to stabilize its position in the borehole before the expansion material is completed, the present application provides a borehole sealing device.

[0007] The present application provides a drilling plugging device that adopts the following technical solution:

[0008] A device for sealing a drill hole comprises a column, a filling groove opened on the circumferential side wall of the column, the filling groove is filled with an expansion water stop, one end of the column is fixedly connected to a connecting piece, and is provided with a plurality of positioning pieces, the connecting piece is provided with a reverse threaded hole, and the plurality of positioning pieces are arranged at intervals around the axis of the column; the positioning piece comprises a rotating part rotatably connected to the column, and a clamping part provided on the rotating part, one end of the clamping part extends in a direction away from the axis of the rotating part, and when the rotating part rotates, the clamping part can slide out of the circumferential side wall of the column.

[0009] By adopting the above technical solution, the connecting piece is connected to the column, and the reverse threaded hole connected to the drill bit thread is opened on the connecting piece, thereby reducing the damage to the column caused by opening the reverse threaded hole on the column. The positioning pieces are arranged at intervals on the column and are connected to the rotation of the column.

[0010] When the clamping part of the positioning piece is located within the circumferential side wall of the column during the lowering process, the possibility of scratching the wall of the borehole can be reduced. When the column is lowered to the specified position in the borehole, the drill bit is rotated in the opposite direction quickly. Under the action of inertia, the drill bit can be separated from the connecting piece, and the column will remain in the borehole. Moreover, under the action of inertia, the column will also rotate in the opposite direction, causing the rotating part to rotate, driving the clamping part to slide out of the circumferential side wall of the column, and the clamping part is pressed against the wall of the borehole or inserted into the wall of the borehole, so that the clamping part can position and fix the column in the borehole. The expansion of the expansion water stop requires a certain amount of time. The positioning of the column by the positioning piece allows the column to stabilize its position, forming a good seal for the borehole.

[0011] By using the reverse thread connection between the drill bit and the connector, it can be ensured that the drill rods of all the drill bits can be taken up. Compared with some patents, it not only saves costs, but also reduces the risk of leaving the drill rod underground and possibly becoming an obstacle to underground engineering.

[0012] Optionally, one end of the column is provided with an embedding groove extending along its own length direction, the connecting member includes a connecting part fixedly connected to the embedding groove and a fixing part arranged on the connecting part, and the reverse threaded hole is arranged at one end of the connecting part.

[0013] By adopting the above technical solution, the connection between the connecting piece and the column enables the drill bit to drive the column to be lowered, and the embedding groove in which the connecting part is embedded on the column increases the connection stability between the connecting piece and the column.

[0014] Optionally, the fixing portion is provided with a plurality of accommodating grooves along its circumference, and the positioning member is located in the corresponding accommodating grooves.

[0015] By adopting the above technical solution, the positioning piece is located in the receiving groove. The setting of the receiving groove can reduce the influence of the disturbance of cement gravel particles in the cement slurry on the positioning piece during the lowering process of the drill rod, stabilize its rotation state, and the clamping part is not easy to slide out of the receiving groove and contact the wall of the drill hole in advance before the column is lowered to the specified position.

[0016] Optionally, it also includes a drill bit, which cooperates with the reverse threaded hole, and the positioning member also includes a clamping block arranged on the circumferential side wall of the rotating part. The connecting member is rotatably connected to a plurality of rotating rods, one end of the rotating rod abuts against the corresponding clamping block, and the other end abuts against the circumferential side wall of the drill bit. The drill bit is limited by the rotating rod to slide out of the circumferential side wall of the column. An elastic member for driving the positioning member to rotate is arranged between the positioning member and the fixed part.

[0017] By adopting the above technical scheme, the rotating rod, the clamping block and the side wall of the drill bit are in contact with each other to form a lever balance state. The drill bit limits the clamping block through the rotating rod to prevent the elastic force of the elastic member from causing the positioning member to rotate during the lowering process and causing the clamping part to slide out of the circumferential side wall of the column. When the column is lowered to the specified position in the drill hole, the drill bit rotates in the opposite direction, and one end of the rotating rod is disengaged from the abutment with the circumferential outer wall of the drill bit. At this time, the elastic member drives the rotating part of the positioning member to rotate, and the clamping part slides out of the circumferential side wall of the column. The positioning member is controlled to rotate by the rotating rod to position the column. The linkage setting of the rotating rod increases the accuracy of controlling the position of the positioning member and enhances the controllability of the position of the column.

[0018] Optionally, the column is fixedly connected to a plurality of sleeves via fasteners, and the rotating part is rotatably connected to the corresponding sleeves.

[0019] By adopting the above technical solution, the positioning member is fixed on the connecting member by the fastener passing through the sleeve sleeved in the positioning member, which increases the connection stability of the positioning member. The sleeve between the fastener and the positioning member also reduces the friction between the fastener and the positioning member, causing the positioning member to be unable to rotate.

[0020] Optionally, a plurality of rotating blocks are provided on the circumferential side wall of the drill bit, and one end of the rotating rod away from the corresponding clamping block abuts against the corresponding rotating block.

[0021] By adopting the above technical solution, the rotating block on the drill bit contacts the rotating rod to form an abutment lever for the clamping block on the positioning piece. The drill bit drives the rotating block to rotate, and the rotation state of the clamping part when the column is in different positions is controlled accurately to control the rotation of the positioning piece.

[0022] Optionally, the axial diameter of the cylinder is smaller than the diameter of the drilled hole.

[0023] By adopting the above technical solution, a certain gap is left between the circumferential outer side of the column and the wall of the drilled hole, thereby reducing the possibility of the column scratching the inner wall of the drilled hole during the downward process.

[0024] Optionally, one end of the column away from the embedding groove is configured in a cone shape.

[0025] By adopting the above technical solution, the column is made of wood, and the bottom end of the column is in a cone shape, which is convenient for lowering the column into the drill hole.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The connecting piece is connected to the column, and the reverse threaded hole connected with the drill bit thread is opened on the connecting piece, which reduces the damage to the column caused by opening the reverse threaded hole on the column. The positioning pieces are arranged on the column at intervals and are connected to the rotation of the column;

[0028] 2. When the clamping part of the positioning piece is located within the circumferential side wall of the column during the lowering process, the possibility of scratching the wall of the borehole can be reduced. When the column is lowered to the designated position in the borehole, the drill bit is quickly rotated in the reverse direction. Under the action of inertia, the drill bit can be separated from the connecting piece, and the column will remain in the borehole. Moreover, under the action of inertia, the column will also rotate in the reverse direction, causing the rotating part to rotate, driving the clamping part to slide out of the circumferential side wall of the column, and the clamping part is pressed against or inserted into the wall of the borehole, so that the clamping part can position and fix the column in the borehole. The expansion of the expansion water stop requires a certain amount of time. The positioning of the column by the positioning piece stabilizes the position of the column, forming a good blockage of the borehole.

[0029] 3. The rotating rod, the clamping block and the side wall of the drill bit are in contact with each other to form a lever balance state. The drill bit limits the clamping block through the rotating rod to prevent the elastic force of the elastic member from causing the positioning member to rotate during the lowering process and causing the clamping part to slide out of the circumferential side wall of the column. When the column is lowered to the specified position in the drill hole, the drill bit rotates in the opposite direction, and one end of the rotating rod is disengaged from the circumferential outer wall of the drill bit. At this time, the elastic member drives the rotating part of the positioning member to rotate, and the clamping part slides out of the circumferential side wall of the column. The positioning member is controlled to rotate by the rotating rod to position the column. The linkage setting of the rotating rod increases the accuracy of controlling the position of the positioning member and enhances the controllability of the position of the column. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the explosion structure of Example 1 of the present application;

[0031] Figure 2is a schematic cross-sectional structural diagram of the main view of Example 1 of the present application;

[0032] Figure 3 is a schematic diagram of the overall structure of the positioning member in Example 1 of the present application;

[0033] Figure 4 is a schematic diagram of the overall structure of the connecting member in Example 1 of the present application;

[0034] Figure 5 is a schematic diagram of a top view of the structure when the positioning member in Example 1 of the present application is in state 1;

[0035] Figure 6 is a schematic diagram of the overall structure when the positioning member in Example 1 of the present application is in state 2;

[0036] Figure 7 It is a schematic diagram of the explosion structure of Example 2 of the present application;

[0037] Figure 8 is a schematic diagram of the overall structure of the positioning member in Example 2 of the present application;

[0038] Fig. 9 is a schematic diagram of a top view of the structure when the positioning member in Example 2 of the present application is in state 1;

[0039] Fig.10 It is a schematic diagram of the top view structure when the positioning member in Example 2 of the present application is in state two.

[0040] Explanation of the accompanying drawings: 1. Cylinder; 11. Filling groove; 12. Embedded groove; 2. Expansion water stop; 3. Connecting piece; 31. Fixing part; 32. Connecting part; 33. Reverse threaded hole; 34. Accommodating groove; 35. Rotating rod; 4. Positioning piece; 41. Rotating part; 42. Clamping part; 421. Guide surface; 422. Clamping point; 43. Clamping block; 44. Sleeve; 5. Drill bit; 51. Rotating block; 6. Elastic piece. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1 -Attached Fig.10 This application is described in further detail.

[0042] In actual situations, the drill bit generally rotates in a clockwise direction, and after the drill bit and the connector are installed, the drill bit drives the column down into the drill hole.

[0043] Embodiment 1,

[0044] This embodiment discloses a device for sealing a drill hole.

[0045] like Figure 1As shown, a device for sealing a drilled hole comprises a column 1, a filling groove 11 is provided on the column 1, the filling groove 11 is arranged on the outer peripheral wall of the column 1, and an expansion water stop 2 is filled in the filling groove 11.

[0046] In this embodiment, the filling groove 11 is opened to a depth of 1 cm on the outer peripheral wall of the column 1 .

[0047] Specifically, in the present embodiment, the swelling water-stopping member 2 is a water-swellable rubber ring, and in other embodiments, it may be a putty-type water-swellable water-stopping strip or other materials.

[0048] An expansion water stop 2 is placed in the filling groove 11. The expansion water stop 2 is filled in the filling groove 11 so that the filling groove 11 has the same diameter as the column 1. After the column 1 is placed in the drilled hole, the expansion water stop 2 absorbs water and expands to fix the column 1 in the drilled hole. The expansion water stop 2 abuts against the inner wall of the hole to form a sealed blockage for the drilled hole.

[0049] This embodiment also includes a connecting member 3 and a plurality of positioning members 4. The connecting member 3 is connected to one end of the column 1. The plurality of positioning members 4 are also connected to one end of the column 1 and are evenly spaced around the axis of the column 1. A reverse threaded hole 33 is provided on the connecting member 3 to be threadedly connected to the drill bit 5.

[0050] The drill bit 5 places the column 1 into the drill hole, and the column 1 is positioned and fixed in the drill hole by the abutment contact between a plurality of positioning members 4 and the wall of the drill hole.

[0051] In this embodiment, the column 1 is spaced apart from the wall of the drilled hole, and the axial diameter of the column 1 is 1 cm smaller than the diameter of the drilled hole, so that the column 1 will not be scratched against the inner wall of the drilled hole during the lowering process, thereby increasing the stability of the column 1 during the lowering process.

[0052] like Figure 2 As shown, one end of the column 1 is concave inward along the axial direction to form a groove 12, and the groove 12 is used to correspond to the installation of the connecting piece 3. The connection with the drill bit 5 is achieved through the connecting piece 3 installed on the column 1, reducing the damage to the column 1 caused by the direct connection between the drill bit 5 and the column 1.

[0053] In this embodiment, the connecting member 3 and the positioning member 4 are connected to one end of the column 1 where the embedding groove 12 is provided.

[0054] Preferably, in this embodiment, the column 1 is made of wood.

[0055] In this embodiment, the column 1 is a column 1, and the bottom end of the column 1 is a pointed cone, and the cone setting facilitates the lowering of the column 1 into the drill hole.

[0056] In this embodiment, the connecting member 3 is made of plastic material, which is convenient for thread processing.

[0057] like Figure 3 As shown, in this embodiment, the positioning member 4 is similar to a ratchet structure, and the positioning member 4 includes a rotating portion 41 and a clamping portion 42 . The rotating portion 41 is rotatably connected to the column 1 , and the clamping portion 42 rotates synchronously with the rotation of the rotating portion 41 .

[0058] The rotating part 41 is a cylinder 1 rotatably connected to the column 1, and the clamping part 42 is a special-shaped plate extending from the side of the rotating part 41. The farthest end of the clamping part 42 away from the axis of the rotating part 41 is a tip, which abuts against the inner wall of the drilled hole.

[0059] A guide surface 421 and a clamping point 422 are provided on the clamping portion 42. The guide surface 421 is an arcuate surface on the side of the clamping portion 42. The arcuate surface is formed by a connecting surface between the outer peripheral surface of the rotating portion 41 and the tip of the rotating portion 41. The guide surface 421 is an end surface on the clamping portion 42 away from the drill bit 5. The arc direction of the guide surface 421 is the same as the tightening direction of the reverse threaded hole 33.

[0060] The arc-shaped guide surface 421 reduces the scratching caused by the contact with the wall of the drill hole during the lowering process of the column 1, which affects the stability of the column 1 during the lowering process.

[0061] like Figure 4 As shown, in this embodiment, the connecting member 3 includes a fixing portion 31 and a connecting portion 32 , and the fixing portion 31 and the connecting portion 32 are an integral structure, which increases the structural stability when the connecting member 3 and the column 1 are connected.

[0062] Specifically, during installation, the connecting portion 32 is fixed in the embedding groove 12, and the fixing portion 31 is located on the end surface of the column 1 away from the cone.

[0063] The connecting portion 32 is a cylindrical structure having the same depth and diameter as the embedding groove 12 . The outer circumferential wall of the connecting portion 32 is interference fit with the inner circumferential wall of the embedding groove 12 , thereby increasing the stability of the connection between the connecting piece 3 and the column 1 .

[0064] The inner peripheral wall of the connecting portion 32 is provided with a reverse threaded hole 33 that cooperates with the drill bit 5 , and the drill bit 5 is screwed into the reverse threaded hole 33 to form a connection with the connecting portion 32 .

[0065] After the reverse threaded hole 33 is connected to the drill bit 5, the column 1 is placed in the drill hole. After determining the position of the column 1 in the drill hole, the drill bit 5 is rotated clockwise to loosen the threaded matching relationship with the connecting part 32, so that the drill bit 5 is disengaged from the connecting part 3, and the column 1 is placed in the drill hole.

[0066] In this embodiment, the fixing portion 31 is a disk with the same diameter as the column 1. The fixing portion 31 is fixed to the end face of the column 1 away from the cone by a plurality of screws. The outer circumference of the fixing portion 31 is flush with the outer circumference of the column 1. When the column 1 is placed in the drilled hole, the contact between the fixing portion 31 and the inner wall of the drilled hole is reduced.

[0067] The fixing portion 31 is provided with eight through holes, and screws are passed through the through holes to fix the fixing portion 31 on the column 1 . The plurality of through holes increases the connection stability between the fixing portion 31 and the column 1 .

[0068] In this embodiment, four notches are formed on the circumference of the fixing portion 31 , and the four notches form a receiving groove 34 . The opening of the receiving groove 34 on the fixing portion 31 is opened outward along the radial direction of the fixing portion 31 .

[0069] like Figure 5 As shown, the number of the four receiving grooves 34 corresponds to the number of the four positioning members 4 , and the positioning members 4 are installed in the receiving grooves 34 accordingly.

[0070] In this embodiment, the four receiving grooves 34 are distributed on the outer peripheral side of the fixing portion 31 at intervals of ninety degrees, and the four positioning members 4 are located in the four receiving grooves 34. When the column 1 is positioned in the drilled hole, the four positioning members 4 contact the inner wall of the drilled hole to position and fix the column 1.

[0071] In other embodiments, the number of the receiving grooves 34 and the positioning members 4 can be several, as long as the number of the receiving grooves 34 and the positioning members 4 are the same and the positions are evenly distributed on the fixing portion 31 to position and fix the column 1.

[0072] In this embodiment, the positioning member 4 is rotatably connected to the column 1 and rotates around the connection point with the column 1 in the receiving groove 34 .

[0073] The different positions of the positioning member 4 in the accommodating groove 34 are divided into state one and state two. When the drill bit 5 is connected to the connecting member 3 and the column 1 is lowered to move into the drill hole, the rotating portion 41 and the clamping portion 42 of the positioning member 4 are both located in the accommodating groove 34. The end of the clamping portion 42 away from the rotating portion 41 is located in the cross-section directly opposite the end of the column 1. The tip of the clamping portion 42 does not expose the circumferential surface of the column 1. This is state one. The positioning member 4 in state one reduces the possibility of the clamping portion 42 of the positioning member 4 contacting and scratching the inner wall of the drill hole during the lowering process of the column 1.

[0074] In the state below, when the drill bit 5 is connected to the connecting member 3 and lowered, the positioning member 4 is in the receiving groove 34, which can reduce the influence of the disturbance of cement gravel particles in the cement slurry on the positioning member 4 and stabilize the rotation state of the positioning member 4. Before the column 1 is lowered to the specified position, the positioning member 4 is not easy to rotate out of the receiving groove 34.

[0075] like Figure 6 As shown, the end of the clamping portion 42 on the positioning member 4 away from the rotating portion 41 rotates out of the cross section directly facing the end of the column 1, which is state two.

[0076] After the column 1 reaches the specified position, the drill bit 5 starts to rotate clockwise instantly, the connecting member 3 gradually separates, and the drill bit 5 is disengaged from the connecting member 3. The inertial force generated by the instantaneous rotation of the drill bit 5 drives the positioning member 4 to rotate in the accommodating groove 34.

[0077] The rotation direction of the positioning member 4 is opposite to that of the drill bit 5. The steering force of the clockwise rotation of the drill bit 5 causes the positioning member 4 to rotate counterclockwise around the connection point with the column 1. The clamping portion 42 on the positioning member 4 rotates out of the accommodating groove 34, and the tip of the clamping portion 42 extends out of the outer circumferential surface contour of the column 1. As the drill bit 5 rotates, the four clamping portions 42 contact the inner wall of the drill hole to form abutment contact, positioning the column 1 in the drill hole. When the drill bit 5 is completely separated from the connecting member 3, the clamping connection between the positioning member 4 and the wall of the drill hole forms a positioning and fixation for the column 1 in the drill hole.

[0078] In this embodiment, the connecting member 3 is rotated counterclockwise to be connected with the thread on the drill bit 5, and the rotation direction of the reverse threaded hole 33 is set opposite to the tightening direction of the thread on the drill bit 5. When the positioning member 4 is placed in the accommodating groove 34, between the adjacent annular positioning members 4, the rotating part 41 on one positioning member 4 is adjacent to the clamping part 42 on another positioning member 4.

[0079] The implementation principle of Example 1 of the present application is as follows: the expansion water stop 2 is filled in the filling groove 11 opened on the outer peripheral wall of the column 1, the connecting part 32 on the connecting part 3 is installed in the embedded groove 12 with a clearance fit, the fixing part 31 is fixedly connected to the top surface of the column 1 by multiple screws, and four receiving grooves 34 for placing the positioning member 4 are opened on the fixing part 31. The connecting part 3 is rotated counterclockwise to connect the column 1 to the drill bit 5, and the drill bit 5 is screwed with the reverse threaded hole 33. The drill bit 5 drives the column 1 into the drill hole. When the drill hole is placed under the drill bit 5, the drill bit 5 does not rotate, and the rotating part 41 of the positioning member 4 is rotatably connected to the column 1, and the clamping part 42 is also located in the receiving groove 34. At this time, it is in a state First, when the column 1 reaches the specified position, that is, above the pressurized aquifer, the drill bit 5 starts to rotate clockwise instantly. Through the instantaneous rotational force, under the action of the inertia of the rotational force, the drill bit 5 can gradually separate from the connecting member 3, leaving the column 1 in the borehole, and the eccentric force causes the positioning member 4 to rotate clockwise around the connection point between the rotating portion 41 and the column 1, and the four clamping portions 42 rotate, and the tip of the clamping portion 42 rotates out of the accommodating groove 34, and the tip of the clamping portion 42 protrudes from the outer peripheral surface of the column 1, and the tips of the four positioning members 4 abut against the inner wall of the borehole. Under the inertia of the reverse eccentric force, the fit between the tip of the clamping portion 42 on the positioning member 4 and the inner wall of the borehole deepens, thereby positioning the column 1.

[0080] Embodiment 2,

[0081] like Figure 7 As shown, in this embodiment, compared with Embodiment 1, the fixing portion 31 does not have a receiving groove 34, and the outer peripheral surface of the fixing portion 31 is flush with the outer peripheral surface of the column 1, ensuring that no scratches occur against the inner wall of the drilled hole during the process of lowering the column 1.

[0082] In this embodiment, an elastic member 6 is disposed between the positioning member 4 and the fixing portion 31 of the connecting member 3 .

[0083] The positioning member 4 is located at the upper end of the fixing portion 31, one end of the elastic member 6 is connected to the end surface of the positioning member 4 close to the fixing portion 31, and the other end of the elastic member 6 is connected to the upper end surface of the fixing portion 31. The elastic member 6 provides the positioning member 4 with a rotational force that causes the positioning member 4 to rotate counterclockwise around the axis of the sleeve 44.

[0084] In this embodiment, a through hole for passing the fastener is opened on the edge side close to the fixing portion 31, and a rotating rod 35 is provided on the fixing portion 31. The rotating rod 35 is located on the top end surface of the fixing portion 31, and the fastener is a screw.

[0085] In this embodiment, eight through holes and four rotating rods 35 are provided.

[0086] The positioning member 4 is located on the upper end surface of the fixing portion 31 , and the positioning member 4 and the corresponding through hole are coaxial, and the positioning member 4 is connected to the connecting member 3 using a fastener.

[0087] A positioning member 4 is installed at intervals of one through hole, and the positioning members 4 are formed in a uniform distribution.

[0088] The rotating rod 35 is rotatably connected to the end surface of the fixing portion 31 , and the rotating rod 35 is located between the through hole and the reverse threaded hole 33 .

[0089] The rotating rod 35 is a cylindrical rod with arcs at both ends. The arc-shaped structure facilitates smooth contact with other components.

[0090] like Figure 8 As shown, in this embodiment, a sleeve 44 is provided in the connection hole on the positioning member 4 , and the sleeve 44 is rotationally connected to the positioning member 4 , so that the positioning member 4 can rotate around the fastener, and the fastener is connected to the positioning member 4 through the sleeve 44 .

[0091] The fastener passes through the sleeve 44 , the elastic member 6 and the through hole on the fixing portion 31 in sequence, and is connected to the top end surface of the column 1 , thereby fixing the positioning member 4 on the connecting member 3 .

[0092] In this embodiment, the positioning member 4 further includes a clamping block 43 , and the clamping block 43 is on the circumferential surface of the positioning member 4 .

[0093] The clamping block 43 is an arc block fixed on the positioning member 4 , and the clamping block 43 and the arc end of the rotating rod 35 are in contact with each other.

[0094] like Fig. 9 As shown, in this embodiment, a rotating block 51 corresponding to the number of the four positioning members is provided on the side wall of the drill bit 5 .

[0095] One end of the rotating rod 35 abuts against the block 43 , and one end of the rotating rod 35 is on the right side of the block 43 , and the other end of the rotating rod 35 abuts against the rotating block 51 on the drill bit 5 .

[0096] A lever is formed between a clamping block 43 , a rotating rod 35 and a rotating block 51 along the radial direction of the column 1 ; at this time, the positioning member 4 is located within the contour range of the outer peripheral surface of the column 1 .

[0097] like Fig.10 As shown, the drill bit 5 rotates clockwise, and the rotating block 51 on the drill bit 5 pushes the rotating rod 35, and the rotating rod 35 rotates counterclockwise around the connection point with the connecting member 3. When the rotating rod 35 rotates, the end away from the drill bit 5 pushes the clamping block 43, and drives the clamping block 43 to rotate a short distance in the clockwise direction. Then, the rotating rod 35 and the clamping block 43 are separated, and the torsional force provided by the elastic member 6 causes the positioning member 4 to rotate counterclockwise, and the clamping portion 42 on the positioning member 4 rotates out of the contour range of the connecting member 3 and contacts the wall of the drill hole, thereby positioning the column 1 in the drill hole.

[0098] The implementation principle of this embodiment 2 is as follows: a fastener is used to pass through the sleeve 44 in the positioning member 4, and then through the elastic member 6, and through the through hole on the fixing portion 31 to connect to the column 1. The two ends of the elastic member 6 are fixed on the positioning member 4 and the fixing portion 31, and the four positioning members 4 are respectively installed on the upper end surface of the fixing portion 31 at a distance of ninety degrees. Then, the fastener is used to pass through the remaining through holes to connect to the column 1, and the positioning member 4 and the connecting member 3 are connected. The connecting member 3 is rotated counterclockwise to connect to the drill bit 5. The positioning members 4 are all in a state and are located within the contour range of the column 1. The clamping blocks 43 on the four positioning members 4 are respectively abutted against the rotating blocks 51 on the drill bit 5 through the corresponding rotating rods 35, so that the positioning member 4 maintains a counterclockwise torsional force. When the drill bit 5 drives the column 1 into place, the instantaneous transmission causes the clamping portion 42 of the positioning member 4 to rotate out of the contour range of the column 1 and abut against the hole wall of the drill hole, thereby completing the positioning and fixing of the column 1.

[0099] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A drilling plugging device, comprising a column (1), a filling groove (11) provided on a circumferential side wall of the column (1), the filling groove (11) being filled with an expansion water stop (2), characterized in that: One end of the column (1) is fixedly connected to a connecting piece (3) and is provided with a plurality of positioning pieces (4); the connecting piece (3) is provided with a reverse threaded hole (33); and the plurality of positioning pieces (4) are arranged at intervals around the axis of the column (1); the positioning piece (4) comprises a rotating portion (41) rotatably connected to the column (1) and a clamping portion (42) provided on the rotating portion (41); one end of the clamping portion (42) extends in a direction away from the axis of the rotating portion (41); when the rotating portion (41) rotates, the clamping portion (42) can slide out of the circumferential side wall of the column (1).

2. The drilling plugging device according to claim 1, characterized in that: One end of the column (1) is provided with an embedding groove (12) extending along its length direction; the connecting member (3) comprises a connecting portion (32) fixedly connected to the embedding groove (12), a fixing portion (31) arranged on the connecting portion (32); and the reverse threaded hole (33) is arranged at one end of the connecting portion (32).

3. The drilling plugging device according to claim 2, characterized in that: The fixing portion (31) is provided with a plurality of accommodating grooves (34) along its circumference, and the positioning member (4) is located in the corresponding accommodating grooves (34).

4. The drilling plugging device according to claim 2, characterized in that: The invention also comprises a drill bit (5), wherein the drill bit (5) cooperates with the reverse threaded hole (33); the positioning member (4) further comprises a clamping block (43) arranged on the circumferential side wall of the rotating portion (41); the connecting member (3) is rotatably connected to a plurality of rotating rods (35); one end of the rotating rod (35) abuts against the corresponding clamping block (43) and the other end abuts against the circumferential side wall of the drill bit (5); the drill bit (5) is limited by the rotating rod (35) to prevent the clamping portion (42) from sliding out of the circumferential side wall of the column (1); and an elastic member (6) for driving the positioning member (4) to rotate is arranged between the positioning member (4) and the fixing portion (31).

5. The drilling plugging device according to claim 4, characterized in that: The column (1) is fixedly connected to a plurality of sleeves (44) via fasteners, and the rotating portion (41) is rotatably connected to the corresponding sleeves (44).

6. The drilling plugging device according to claim 4, characterized in that: A plurality of rotating blocks (51) are provided on the circumferential side wall of the drill bit (5), and one end of the rotating rod (35) away from the corresponding clamping block (43) abuts against the corresponding rotating block (51).

7. The drilling plugging device according to claim 1, characterized in that: The axial diameter of the column (1) is smaller than the diameter of the drilled hole.

8. The drilling plugging device according to claim 3, characterized in that: One end of the column (1) away from the embedding groove (12) is arranged in a cone shape.

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