Hole collapse and grout overflow prevention device and grout overflow prevention method thereof

Abstract

The invention relates to the technical field of pile foundation construction equipment, and discloses a hole collapse and grout overflow prevention device and a grout overflow prevention method thereof.The hole collapse and grout overflow prevention device comprises a frame body, two partition plates, two connecting cylinders and two sealing gaskets, the two partition plates are arranged on the left side and the right side of the lower portion of the frame body respectively, and the connecting cylinders slide in the partition plates; the sealing gasket is arranged on the upper portion of the inner wall of the connecting cylinder, a first locking piece used for locking the protective cylinder is arranged in the connecting cylinder, and a moving piece used for limiting the position of the connecting cylinder is arranged in the partition plate. A synchronous linkage locking structure simplifies the fixing process; during evacuation, lateral extrusion force can be dispersed in a self-adaptive mode, deformation of the connecting cylinder and abrasion of the protective cylinder are avoided, disturbance of surrounding soil is reduced, the hole collapse risk is reduced, and reusability and construction quality of the device are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of pile foundation construction equipment technology, and more specifically, to a device for preventing grout overflow in a collapse hole and a method for preventing grout overflow. Background Technology

[0002] During pile foundation construction, bored piles are widely used in the foundation construction of buildings, bridges, rail transit and other projects due to their advantages such as wide adaptability to strata and strong bearing capacity. The casing, as the core auxiliary component of bored pile construction, mainly functions to fix the position of the pile hole, isolate surface water from flowing into the hole, protect the slope of the hole opening from collapse, and provide a guiding reference for the drilling machinery. It is a key link to ensure the smooth progress of pile foundation construction. The anti-collapse hole overflow device is a box-shaped container designed specifically for slurry materials (such as mud for pile foundation construction). It has the core function of storing mud and can prevent mud from overflowing and polluting the construction environment. Its essence is to store slurry materials through a robust box structure (mostly made of steel).

[0003] Existing anti-collapse hole overflow devices require hoisting machinery to lift the device onto the top of the casing, align the casing with the sheath below the device, and then insert it, using a sealing structure to complete the connection. This requires high precision during hoisting, increasing the difficulty and time cost of construction operations. Furthermore, when the device is removed after use, if the hoisting angle is not vertical, gravity causes the casing to gradually detach from the sheath as the device moves upwards. The sidewalls of the sheath (in the opposite direction of the inclination) are subjected to lateral compression from the casing, especially at the lower edge. This localized stress concentration can easily cause deformation of the sheath, affecting the device's reusability, potentially causing wear on the casing, and even disturbing the surrounding soil, increasing the risk of hole collapse and severely impacting construction efficiency and quality. Summary of the Invention

[0004] This invention provides a device and method for preventing grout overflow from a hole, which solves the technical problems in related technologies, such as high precision requirements for the connection between the anti-collapse hole grout overflow device and the casing, high operational difficulty, and the risk of the casing being squeezed and deformed due to non-vertical angles during hoisting and removal, resulting in poor reusability of the device, wear on the casing, and increased risk of hole collapse due to disturbance of the surrounding soil.

[0005] This invention provides a device for preventing grout overflow from a collapsed hole, comprising a frame, two partitions, two connecting cylinders, and two sealing gaskets. The two partitions are respectively disposed on the lower left and right sides of the frame. The connecting cylinders slide inside the partitions. The sealing gaskets are disposed on the upper part of the inner wall of the connecting cylinders. The connecting cylinders are provided with a locking element for locking the protective cylinder inside. The partitions are provided with a moving element for restricting the position of the connecting cylinder inside.

[0006] In a preferred embodiment, the locking element one includes a drive ring rotatably connected inside the connecting cylinder. The upper part of the drive ring has a plurality of evenly distributed drive grooves. The lower part of the connecting cylinder has a plurality of evenly distributed locking blocks slidably connected. The locking block is provided with a drive block one on the side near the drive ring. The drive block one slides inside the drive groove. The connecting cylinder is provided with a driving element two for driving the drive ring to rotate.

[0007] In a preferred embodiment, the movable component includes a plurality of evenly distributed movable rods rotatably connected to the inner edge of the partition. A movable rod is rotatably connected to the end of the movable rod away from the partition. The end of the movable rod away from the movable rod is rotatably connected to the upper edge of the connecting cylinder. A locking component 2 for locking the connecting cylinder is provided inside the connecting cylinder.

[0008] In a preferred embodiment, the second locking member includes a plurality of evenly distributed locking plates slidably inside the upper part of the connecting cylinder. A plurality of evenly distributed gears are rotatably connected to the upper part of the connecting cylinder. A locking plate is provided on the side of the gears near the locking plates. A gear is provided at the lower part of the end of the moving rod near the connecting cylinder. The gears mesh with the gears. A driving member is provided in the lower part of the connecting cylinder for driving the locking plates to move.

[0009] In a preferred embodiment, the driving component one includes a plurality of evenly distributed gears three rotatably connected to the lower part of the connecting cylinder. A driving block two is provided on the upper part of the gears three. A pulling rod is slidably connected inside the driving block two. A sliding rod is provided on the lower part of the pulling rod. The upper end of the pulling rod is located on the side of the locking plate two away from the locking plate one.

[0010] In a preferred embodiment, the second driving component includes a worm gear rotatably connected to the inner edge of the connecting cylinder, teeth are provided on the outer edge of the driving ring, the worm gear and the driving ring mesh with each other, and a third driving block is provided at the end of the worm gear away from the connecting cylinder.

[0011] In a preferred embodiment, the drive block 2 has a spiral groove inside, and the slide rod slides inside the groove.

[0012] In a preferred embodiment, guide blocks are provided on both the left and right sides of the locking block, and the guide blocks slide inside the connecting cylinder.

[0013] In a preferred embodiment, a plurality of evenly distributed bolts are threaded onto the inner edge of the connecting cylinder, the gear is rotatably connected to the middle of the bolts, and a nut is threaded onto the middle of the bolts, the nut abutting against the lower part of the connecting cylinder.

[0014] This invention provides another technical solution: a method for preventing grout overflow in a collapsed borehole, comprising the following steps: S1: After the casing is installed, use a hoisting device to hoist the equipment to the top of the casing, keeping the upper ends of the connecting cylinder and the casing overlapping and placing the device downwards; S2: When the connecting cylinder is close to the protective cylinder, manually push the connecting cylinder to adjust the relative position between the connecting cylinder and the protective cylinder so that the protective cylinder is inserted into the middle of the connecting cylinder, and the sealing gasket is used to achieve a seal between the connecting cylinder and the protective cylinder; S3: When the device is placed on the ground, the position of the connecting cylinder relative to the frame is fixed. Use a tool to rotate the drive block three to drive the locking component one to rotate, so that multiple locking blocks extend from the inside of the connecting cylinder and are stuck on the outer wall of the protective cylinder. The drive ring can pull the locking plate two downward through the drive component one and press it against the upper part of the locking plate one. The locking plate one and the locking plate two can lock the angle of the gear, gear two and the locking plate one through friction, thereby locking the position of multiple moving rods two, thus locking the position of the connecting cylinder relative to the frame. S4: During grouting, the slurry flowing out of the casing will flow into the interior of the frame; S5: Clean the frame after construction is completed; S6: Use a tool to release the lock between the connecting sleeve and the protective sleeve; S7: Use hoisting tools to lift the frame upwards so that the casing is detached from the inside of the connecting cylinder.

[0015] The beneficial effects of this invention are as follows: 1. This invention effectively solves the core problems of existing anti-collapse hole overflow devices, such as high precision requirements for docking and easy deformation during removal. Through the combination structure of multiple sets of moving rod one and moving rod two of the moving component, the connecting cylinder can move freely in two dimensions between the partition and the frame. During hoisting, there is no need to strictly align the protective cylinder. After the connecting cylinder is close, manual adjustment can be performed to complete the docking. With the help of the sealing gasket, a seal is achieved, which greatly reduces the difficulty of hoisting operation and shortens the alignment time. At the same time, with the linkage design of the driving component two and the driving ring, rotating the driving block three can simultaneously complete two key operations: pushing the locking block to extend out of the locking protective cylinder and pulling the locking plate two to cooperate with the locking plate one to fix the position of the connecting cylinder. There is no need for step-by-step operation, which further simplifies the process and improves construction efficiency and structural stability. 2. When hoisting and removing the equipment after construction, even if the hoisting angle is not vertical, the connecting cylinder can adaptively adjust its relative position with the casing through the linkage structure of the moving parts. This disperses the lateral extrusion force of the casing on the side wall of the connecting cylinder, avoiding deformation of the connecting cylinder caused by localized stress concentration, and ensuring the reusability of the device. At the same time, it reduces the hard friction between the casing and the connecting cylinder, reduces the risk of casing wear, and further avoids disturbing the soil around the casing due to extrusion, maintaining the stability of the borehole slope, fundamentally reducing the risk of borehole collapse, and providing dual protection for the quality and safety of pile foundation construction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connecting cylinder structure of the present invention; Figure 3 This is a schematic cross-sectional view of the side of the connecting cylinder of the present invention; Figure 4 This is a schematic cross-sectional view of the upper part of the connecting cylinder of the present invention; Figure 5 This is a schematic diagram of the structure of the locking plate of the present invention; Figure 6 This is a schematic diagram of the drive ring structure of the present invention; Figure 7 This is a schematic diagram of the structure of the pull rod of the present invention; Figure 8 This is a side sectional view of the drive block of the present invention; Figure 9 This is a schematic diagram of the gear structure of the present invention.

[0017] In the diagram: 1. Frame; 11. Partition; 12. Connecting cylinder; 13. Sealing gasket; 2. Locking component one; 21. Locking block; 22. Drive ring; 23. Drive block one; 24. Drive groove; 25. Guide block; 3. Moving component; 31. Moving rod one; 32. Moving rod two; 4. Locking component two; 41. Gear one; 42. Gear two; 43. Locking plate one; 44. Locking plate two; 5. Drive component one; 51. Gear three; 52. Drive block two; 53. Pull rod; 54. Slide rod; 55. Slide groove; 6. Drive component two; 61. Worm gear; 62. Drive block three; 71. Bolt; 72. Nut. Detailed Implementation

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0019] like Figures 1-8 As shown, an anti-collapse hole overflow device includes a frame 1, two partitions 11, two connecting cylinders 12, and two sealing gaskets 13. The two partitions 11 are respectively arranged on the lower left and right sides of the frame 1. The connecting cylinders 12 slide inside the partitions 11. The sealing gaskets 13 are arranged on the upper part of the inner wall of the connecting cylinders 12. The connecting cylinders 12 are provided with locking components 2 for locking the protective cylinder. The partitions 11 are provided with moving components 3 for limiting the position of the connecting cylinders 12.

[0020] Specifically, the frame 1 is an open container with two circular holes at the bottom, thus serving as a container for slurry. Slurry overflowing from the casing flows into the interior of the frame 1. A partition 11, coaxial with the circular holes, is installed at the bottom of the frame 1. The partition 11 is also an open container with an open top and an open bottom. The space between the partition 11 and the frame 12 can accommodate the movement of the connecting cylinder 12 within it. The thickness of the connecting cylinder 12 is the same as the distance between the partition 11 and the connecting cylinder 12. The lower part of the connecting cylinder 12 extends downwards and can protrude from the bottom of the partition 11. The lower diameter of the connecting cylinder 12 is smaller than that of the partition 11. The opening diameter at the bottom of plate 11 allows the connecting cylinder 12 to move freely in two dimensions within the cavity between the partition plate 11 and the frame 1, i.e., there are two mutually perpendicular directions of movement. The sealing gasket 13 is located on the upper inner side of the connecting cylinder 12. When the connecting cylinder 12 is fitted onto the outer wall of the protective cylinder, the sealing gasket 13 can seal the gap between the two, preventing mud from flowing out between them. By controlling the locking element 2 and the moving element 3, the connection between the connecting cylinder 12 and the protective cylinder and the horizontal position of the connecting cylinder 12 relative to the protective cylinder can be fixed.

[0021] Preferably, the locking component 2 includes a drive ring 22 rotatably connected inside the connecting cylinder 12. The upper part of the drive ring 22 is provided with a plurality of evenly distributed drive grooves 24. The lower part of the interior of the connecting cylinder 12 is slidably connected with a plurality of evenly distributed locking blocks 21. A drive block 23 is provided on the side of the locking block 21 near the drive ring 22. The drive block 23 slides inside the drive grooves 24. Teeth are provided at the outer edge of the drive ring 22. The interior of the connecting cylinder 12 is provided with a driving component 6 for driving the drive ring 22 to rotate.

[0022] Specifically, multiple locking blocks 21 are divided into two groups distributed on the inner wall of the connecting cylinder 12. The driving ring 22 set between the two groups of locking blocks 21 can be driven to rotate. The driving block 23 can push the multiple locking blocks 21 to slide out from the inside of the connecting cylinder 12 and lock onto the outer wall of the protective cylinder, thereby realizing the connection between the connecting cylinder 12 and the protective cylinder. The two groups of locking blocks 21 are provided with mirrored anti-slip textures on the side near the protective cylinder, which has the function of preventing the protective cylinder from sliding up and down. The arc-shaped driving groove 24 opened on the surface of the driving ring 22 is a driving structure used in conjunction with the driving block 23. Before the connecting cylinder 12 locks the protective cylinder, the driving block 23 is located outside the driving groove 24, that is, away from the center of the driving ring 22. When the driving ring 22 is driven to rotate clockwise, the driving block 23 is pushed by the driving groove 24 and moves towards the center of the driving ring 22, thereby pushing the locking blocks 21 to slide out and lock onto the outer wall of the protective cylinder.

[0023] Preferably, the movable component 3 includes a plurality of evenly distributed movable rods 31 rotatably connected to the inner edge of the partition 11. A movable rod 32 is rotatably connected to the end of the movable rod 31 away from the partition 11. The end of the movable rod 32 away from the movable rod 31 is rotatably connected to the upper edge of the connecting cylinder 12. A locking component 4 for locking the connecting cylinder 12 is provided inside the connecting cylinder 12.

[0024] Specifically, the first moving rod 31 and the second moving rod 32 are a linkage structure. By regularly arranging multiple sets of first moving rods 31 and second moving rods 32, and setting the ends of multiple second moving rods 32 away from the first moving rod 31 at the edge of the connecting cylinder 12, when the connecting cylinder 12 moves inside the partition 11, it will push and pull the combined structure of multiple first moving rods 31 and second moving rods 32 to deform. Moreover, the motion data of the connecting cylinder 12 can be recorded by multiple sets of first moving rods 31 and second moving rods 32. That is, the angle data between first moving rods 31 and second moving rods 32 can reflect the displacement of the connecting cylinder 12, so it will not affect the movement of the connecting cylinder 12. Conversely, as long as the angle of first moving rods 31 and second moving rods 32 is fixed, the current position of the connecting cylinder 12 can be fixed.

[0025] Preferably, the locking element 2 4 includes a plurality of evenly distributed locking plates 2 44 that slide inside the upper part of the connecting cylinder 12. A plurality of evenly distributed gears 1 41 are rotatably connected to the upper part of the connecting cylinder 12. A locking plate 1 43 is provided on the side of the gear 1 41 near the locking plate 2 44. A gear 2 42 is provided at the lower part of the end of the moving rod 2 32 near the connecting cylinder 12. The gear 2 42 meshes with the gear 1 41. A driving element 1 5 for driving the locking plate 2 44 to move is provided in the lower part of the connecting cylinder 12.

[0026] Specifically, gear 1 41 and gear 2 42 are transmission structures that rotate inside the connecting cylinder 12 and are fixed to the end of the moving rod 2 32 away from the moving rod 1 31, respectively. They can drive each other to rotate. Locking plate 1 43 is a friction structure set on the side of gear 1 41 near the center of the connecting cylinder 12. Similarly, there is locking plate 2 44 set on the upper part of locking plate 1 43. Locking plate 2 44 is also a friction structure. The lower part of locking plate 2 44, near the side of locking plate 1 43, is provided with a protruding structure. The upper part of locking plate 1 43 is also provided with a corresponding protruding structure. The complementary concave and convex structure increases the friction area between locking plate 1 43 and locking plate 2 44. When locking plate 2 44 moves downward and presses against the upper part of locking plate 1 43, it can restrict the rotation of locking plate 1 43. Locking plate 1 43 is connected to gear 1 41, thereby restricting the rotation of gear 1 41. Gear 1 41 and gear 2 42 mesh, thereby preventing the rotation of gear 2 42. This restricts the angle change of moving rod 1 31 to moving rod 2 32, thereby fixing the position of connecting cylinder 12.

[0027] Preferably, the drive component 5 includes a plurality of evenly distributed gears 51 rotatably connected to the lower part of the connecting cylinder 12. The gears 51 mesh with the drive ring 22. A drive block 52 is provided on the upper part of the gears 51. A pull rod 53 is slidably connected inside the drive block 52. A slide rod 54 is provided on the lower part of the pull rod 53. The upper end of the pull rod 53 is located on the side of the locking plate 44 away from the locking plate 43.

[0028] Preferably, the drive block 2 52 has a spiral groove 55 inside, and the slide rod 54 slides inside the groove 55.

[0029] Specifically, drive block 2 52 is located above gear 3 51. Gear 3 51 and drive ring 22 mesh with each other. When drive ring 22 rotates, it drives gear 3 51 and drive block 2 52 to rotate. Drive block 2 52 has a spiral channel groove 55 inside, which can accommodate slide rod 54 to slide within. The upper part of pull rod 53 is rectangular, and the lower part that slides inside drive block 2 52 is circular. Therefore, when drive block 2 52 rotates, slide rod 54 will be pushed by the groove 55 to move up and down along drive block 2 52. Slide rod 54 can drive pull rod 53 to move up and down. The upper part of the pull rod 53 is rectangular, which can prevent the pull rod 53 from being pushed to rotate under the friction of the slide groove 55 and the slide rod 54 when the drive block 2 52 rotates. This restricts the movement of the pull rod 53 to one dimension of up and down movement. That is, the lifting and lowering of the locking plate 2 44 is linked by the rotation of the drive component 1 5 and the drive ring 22. When the drive ring 22 rotates clockwise to push the locking block 21 to lock the protective cylinder, the locking plate 2 44 is pulled downward by the pull rod 53 and the locking plate 1 43 is pressed to lock the position of the locking plate 1 43. This can realize the dynamic linkage of locking the protective cylinder and connecting the connecting cylinder 12 with the protective cylinder.

[0030] Preferably, the second driving component 6 includes a worm gear 61 rotatably connected to the inner edge of the connecting cylinder 12, the worm gear 61 and the driving ring 22 meshing with each other, and a third driving block 62 is provided at the end of the worm gear 61 away from the connecting cylinder 12.

[0031] Specifically, the worm 61 and the drive ring 22 cooperate to form a one-way transmission "worm gear" self-locking structure. A triangular hole is opened in the middle of the drive block 62, so that the drive block 62 and the worm 61 can be rotated by using a suitable tool. That is, the worm 61 and the drive block 62 can be rotated by using a suitable tool, and the drive ring 22 can be rotated. The teeth of the drive ring 22 are parallel to the screw marks of the worm 61. This causes the rotation direction of the drive ring 22 to be perpendicular to the screw marks of the worm 61. It is impossible to drive the worm 61 to rotate by rotating the drive ring 22. On the contrary, the worm 61 can easily drive the drive ring 22 to rotate.

[0032] Preferably, guide blocks 25 are provided on both the left and right sides of the locking block 21, and the guide blocks 25 slide inside the connecting cylinder 12.

[0033] Specifically, a guide block 25 is provided on the left and right sides of a locking block 21. The guide block 25 protrudes from the surface of the locking block 21. On the one hand, it can guide the locking block 21 to maintain a straight trajectory when sliding, and on the other hand, it can limit the sliding distance of the locking block 21. That is, the sliding stroke of the guide block 25 can be used to limit the sliding distance of the locking block 21.

[0034] like Figure 9As shown, in another embodiment of the present invention: a plurality of evenly distributed bolts 71 are threadedly connected to the inner edge of the connecting cylinder 12, a gear 41 is rotatably connected to the middle of the bolts 71, and a nut 72 is threadedly connected to the middle of the bolts 71, the nut 72 abutting against the lower part of the connecting cylinder 12.

[0035] Specifically, bolt 71 is threaded into the inside of connecting cylinder 12. Rotating bolt 71 changes its length within the connecting cylinder 12. Gear 41 is positioned in the middle of bolt 71, allowing it to rotate within this middle section. Changing the length of bolt 71 within the connecting cylinder 12 simultaneously alters the height of gear 41 within the cylinder, thereby changing the distance between locking plate 43 and locking plate 44. When the device needs to connect to a casing with an excessively large diameter, the distance should be smaller than the connecting cylinder. When the inner diameter of the connecting cylinder 12 is such that the locking block 21 is driven to rotate and abut against the outer wall of the casing, the distance that the second locking plate 44 and the pulling rod 53 descend is insufficient to allow the second locking plate 44 to abut against the upper part of the first locking plate 43 to form a stable frictional locking force. At this time, the nut 72 can be rotated to move the nut 72 away from the connecting cylinder 12, and then the bolt 71 can be rotated to move the first gear 41 and the first locking plate 43 upward inside the connecting cylinder 12 to reduce the distance between the second locking plate 44 and the first locking plate 43. This can match the frictional force required to lock the horizontal position of the large-diameter casing.

[0036] Another embodiment of the present invention provides a method for preventing grout overflow in a collapsed borehole, comprising the following steps: S1: After the casing is installed, use a hoisting device to hoist the equipment to the top of the casing, keeping the upper end of the connecting cylinder 12 and the casing overlapping and placing the device downwards; S2: When the connecting cylinder 12 approaches the protective cylinder, manually push the connecting cylinder 12 to adjust the relative position between the connecting cylinder 12 and the protective cylinder, so that the protective cylinder is inserted into the middle of the connecting cylinder 12, and the sealing gasket 13 is used to achieve a seal between the connecting cylinder 12 and the protective cylinder. S3: When the device is placed on the ground, the position of the connecting cylinder 12 relative to the frame 1 is fixed. Using a tool to rotate the drive block 3 62, the locking component 1 2 is rotated so that multiple locking blocks 21 extend from the inside of the connecting cylinder 12 and are stuck on the outer wall of the protective cylinder. The drive ring 22 can pull the locking plate 2 44 downward through the drive component 1 5 and press it against the upper part of the locking plate 1 43. The locking plate 1 43 and the locking plate 2 44 can lock the angle of the gear 1 41, the gear 2 42 and the locking plate 1 43 through friction, thereby locking the position of multiple moving rods 2 32, thus locking the position of the connecting cylinder 12 relative to the frame 1. S4: During grouting, the slurry flowing out of the casing will flow into the interior of frame 1; S5: Clean the frame 1 after construction is completed; S6: Use a tool to release the lock between the connecting cylinder 12 and the protective cylinder; S7: Use hoisting tools to lift the frame 1 upwards so that the casing is detached from the inside of the connecting cylinder 12.

[0037] Specifically, after the casing is installed, before grouting, the frame 1 is hoisted using a hoisting device to align the connecting cylinder 12 with the casing and move the frame 1 downwards. When the connecting cylinder 12 moves, it will push the combination of multiple sets of moving rods 1 31 and moving rod 2 32 to rotate and deform. Through the transmission between moving rod 2 32, gear 2 42 and gear 1 41, the locking plate 1 43 can be driven to rotate, pushing the connecting cylinder 12 to slide so that the casing can be inserted from the inside of the connecting cylinder 12. When the casing is inserted into the connecting cylinder 12, the sealing gasket 13 can seal the gap between the connecting cylinder 12 and the casing to prevent leakage during grouting. Then, using tools, drive block 3 62 and worm gear 61 are rotated. Worm gear 61 can drive drive ring 22 to rotate in one direction. The rotation of drive ring 22 can simultaneously push drive block 1 23 and gear 3 51 to move. Drive ring 22 can push drive block 1 23 to slide, thereby driving multiple locking blocks 21 to slide from the inside of connecting cylinder 12 and press against the side wall of the protective cylinder. At the same time, gear 3 51 can drive drive block 2 52 to rotate. When drive block 2 52 rotates, it can be driven to rotate through the internal sliding groove 55. The sliding groove 55 can push sliding rod 54 and pulling rod 53 to move downward. Pulling rod 53 drives locking plate 2 44 to move downward and press against the upper part of locking plate 1 43. Through the friction between locking plate 1 43 and locking plate 2 44, locking plate 1 43 can be locked and locked to prevent locking plate 1 43 from rotating. Thus, the position of connecting cylinder 12 relative to frame 1 can be fixed, thereby completing the installation of the device. Then, grouting operation can be performed, and slurry can flow into the interior of frame 1. After the construction is completed and the mud inside the frame 1 is cleaned, use tools to release the locking part 2 from the protective cylinder. At the same time, the locking part 4 can release the locking part 3. Thus, the relative position between the connecting cylinder 12 and the frame 1 is released. Then, use hoisting tools to hoist the frame 1 upward. When the frame 1 is hoisted, the frame 1 will shake. At this time, with the assistance of the moving part 3, the connecting cylinder 12 can avoid the protective cylinder from squeezing the connecting cylinder 12 when the device is suddenly raised and shaken.

[0038] The embodiments of this example have been described above. However, this example is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this example, and all of them are within the protection scope of this example.

Claims

1. A device for preventing grout overflow from a collapsed borehole, comprising a frame (1), two partitions (11), two connecting cylinders (12), and two sealing gaskets (13), characterized in that, The two partitions (11) are respectively disposed on the lower left and right sides of the frame (1). The connecting cylinder (12) slides inside the partition (11). The sealing gasket (13) is disposed on the upper part of the inner wall of the connecting cylinder (12). The connecting cylinder (12) is provided with a locking member (2) for locking the protective cylinder. The partition (11) is provided with a moving member (3) for limiting the position of the connecting cylinder (12).

2. The anti-collapse hole overflow device according to claim 1, characterized in that, The locking component one (2) includes a drive ring (22) rotatably connected inside the connecting cylinder (12). The upper part of the drive ring (22) is provided with a plurality of evenly distributed drive grooves (24). The lower part of the inner part of the connecting cylinder (12) is slidably connected with a plurality of evenly distributed locking blocks (21). The locking block (21) is provided with a drive block one (23) on the side near the drive ring (22). The drive block one (23) slides inside the drive groove (24). The outer wall edge of the drive ring (22) is provided with teeth. The inner part of the connecting cylinder (12) is provided with a driving component two (6) for driving the drive ring (22) to rotate.

3. The anti-collapse hole overflow device according to claim 1, characterized in that, The moving part (3) includes a plurality of evenly distributed moving rods (31) rotatably connected to the inner edge of the partition (11). The end of the moving rod (31) away from the partition (11) is rotatably connected to a moving rod (32). The end of the moving rod (32) away from the moving rod (31) is rotatably connected to the upper edge of the connecting cylinder (12). The interior of the connecting cylinder (12) is provided with a locking part (4) for locking the connecting cylinder (12).

4. The anti-collapse hole overflow device according to claim 3, characterized in that, The second locking component (4) includes multiple evenly distributed locking plates (44) that slide inside the upper part of the connecting cylinder (12). Multiple evenly distributed gears (41) are rotatably connected to the upper part of the connecting cylinder (12). A locking plate (43) is provided on the side of the gear (41) near the second locking plate (44). A gear (42) is provided at the lower part of the end of the moving rod (32) near the connecting cylinder (12). The gear (42) meshes with the gear (41). A driving component (5) for driving the second locking plate (44) to move is provided in the lower part of the connecting cylinder (12).

5. A device for preventing grout overflow from a collapsed borehole according to claim 2 or 4, characterized in that, The first driving component (5) includes a plurality of evenly distributed gears (51) rotatably connected to the lower part of the connecting cylinder (12). The gears (51) mesh with the driving ring (22). A second driving block (52) is provided on the upper part of the gears (51). A pull rod (53) is slidably connected inside the second driving block (52). A slide rod (54) is provided on the lower part of the pull rod (53). The upper end of the pull rod (53) is located on the side of the second locking plate (44) away from the first locking plate (43).

6. The anti-collapse hole overflow device according to claim 5, characterized in that, The second driving component (6) includes a worm (61) rotatably connected to the inner edge of the connecting cylinder (12), the worm (61) and the driving ring (22) meshing with each other, and a third driving block (62) is provided at the end of the worm (61) away from the connecting cylinder (12).

7. The anti-collapse hole overflow device according to claim 5, characterized in that, The drive block 2 (52) has a spiral groove (55) inside, and the slide rod (54) slides inside the groove (55).

8. The anti-collapse hole overflow device according to claim 2, characterized in that, The locking block (21) is provided with guide blocks (25) on both the left and right sides, and the guide blocks (25) slide inside the connecting cylinder (12).

9. The anti-collapse hole overflow device according to claim 4, characterized in that, Multiple evenly distributed bolts (71) are threaded at the inner edge of the connecting cylinder (12). The gear (41) is rotatably connected to the middle of the bolts (71). A nut (72) is threaded at the middle of the bolts (71), and the nut (72) abuts against the lower part of the connecting cylinder (12).

10. A method for preventing grout overflow from a collapsed borehole, characterized in that, Includes the following steps: S1: After the casing is installed, use a hoisting device to hoist the equipment to the top of the casing and keep the upper end of the connecting tube (12) and the casing overlapping and the device placed downwards; S2: When the connecting cylinder (12) approaches the protective cylinder, manually push the connecting cylinder (12) to adjust the relative position between the connecting cylinder (12) and the protective cylinder so that the protective cylinder is inserted into the middle of the connecting cylinder (12) and the sealing gasket (13) is used to achieve a seal between the connecting cylinder (12) and the protective cylinder. S3: When the device is placed on the ground, the position of the connecting cylinder (12) relative to the frame (1) is fixed. Use a tool to rotate the drive block three (62) to drive the locking part one (2) to rotate so that multiple locking blocks (21) extend out from the inside of the connecting cylinder (12) and are stuck on the outer wall of the protective cylinder. The drive ring (22) can pull the locking plate two (44) downward through the drive part one (5) and press it against the upper part of the locking plate one (43). The locking plate one (43) and the locking plate two (44) can lock the angle of the gear one (41), the gear two (42) and the locking plate one (43) through friction, thereby locking the position of multiple moving rods two (32), thus locking the position of the connecting cylinder (12) relative to the frame (1). S4: During grouting, the slurry flowing out of the casing will flow into the interior of the frame (1); S5: Clean the frame after construction is completed (1); S6: Use a tool to release the lock between the connecting cylinder (12) and the protective cylinder; S7: Use hoisting tools to lift the frame (1) upwards so that the casing is detached from the inside of the connecting cylinder (12).

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