Device for disassembling follow pipe in fixed-length hole
By designing a disassembly device for pipe-scaling holes, the problem of large blind spots in water discharge hole construction and the risk of pipe-scaling pulling or retention in traditional tunnel construction is solved, and efficient and safe tunnel advance water discharge construction is achieved.
Patent Information
- Application Number
- CN202510869632.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-26
- Publication Date
- 2025-08-15
AI Technical Summary
In traditional tunnel construction, the drainage hole construction has large drainage blind spots, low drilling accuracy, and lag behind inrush water sealing, which is difficult to meet the needs of rapid pressure relief and precise prevention and control in water-rich crushed formations. There is a risk of complete pulling out the follower pipe or leaving it in the hole.
A disassembly device inside the ruler hole of the following pipe is designed, including a front inner support mechanism, a rear inner support mechanism and a torque output mechanism. The front inner support mechanism is driven to drive the follower to rotate through a hydraulic motor and a planetary reducer, disconnect the follower pipe, and remove the follower pipe section by section.
Improve the efficiency of pipe removal, reduce material waste, ensure that the drain hole can still discharge water normally after some sections are removed, and avoid safety risks during construction.
Smart Images
Figure CN120487136A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of tunnel advance construction, and in particular relates to a device for disassembling a follower pipe in a fixed-length hole. Background Art
[0002] As my country's tunnel projects extend to areas with deep burials and complex geological conditions, the safe construction of high-risk water inrush tunnels faces severe challenges. Traditional drainage hole construction mostly uses single-point vertical drilling or small-angle inclined hole technology on the face. There are problems such as large drainage blind areas, low drilling accuracy, and delayed water inrush sealing. It is difficult to meet the needs of rapid pressure relief and precise prevention and control in water-rich and broken formations. After the horizontal directional drilling construction is completed, the follower pipe (a casing inserted as the hole is drilled, and the sections of the follower pipe are connected by threads) is placed in the hole. After the follower pipe is completely pulled out, the risk of collapse of the drainage hole is high. At present, there is an urgent need to develop a method for removing the follower pipe in the drainage hole, and the follower pipe can be removed in sections according to different formations, so as to promote the development of tunnel advance drainage construction in a more efficient and energy-saving direction. Summary of the Invention
[0003] The present invention aims to solve the problem that after the construction of the tunnel advance drainage hole is completed, the risk of the drainage hole collapse may be caused by completely pulling out the follower pipe, while the problem of material waste caused by leaving the follower pipe completely in the hole is solved.
[0004] The present invention provides the following technical solution: a disassembly device for a fixed-size hole of a heel tube, comprising a front inner support mechanism, a rear inner support mechanism and a torque output mechanism connected by a central axis; the front inner support mechanism and the rear inner support mechanism can extend and retract along the radial direction of the heel tube, the front inner support mechanism is used to support and fix it in the previous section of the heel tube, and the rear inner support mechanism is used to support and fix it in the next section of the heel tube, and the torque output mechanism uses the rear inner support mechanism as a reaction force support to drive the front inner support mechanism to rotate with the previous section of the heel tube.
[0005] Furthermore, the torque output mechanism includes a hydraulic motor and a planetary reducer; the sun gear of the planetary reducer is coaxial with the central shaft; the sun gear is fixed on the central shaft; the planetary carrier of the planetary reducer is installed on the central shaft, and the planetary carrier is free in the circumferential direction and fixed in the axial direction; the hydraulic motor is installed on the swing arm on the central shaft, the output shaft of the hydraulic motor is connected to one of the planetary gears on the planetary carrier, and the inner ring gear of the planetary reducer is fixedly connected to the front inner support mechanism; the planetary gears are meshed with the sun gear and the inner ring gear.
[0006] Furthermore, the rear inner support mechanism includes a rear hydraulic cylinder, which is a double-acting cylinder. The cylinder barrel of the rear hydraulic cylinder is fixedly connected to the central axis, and rear pressure plates are fixed to the ends of the cylinder rods on both sides of the rear hydraulic cylinder.
[0007] Furthermore, the front inner support mechanism includes a seat body and two front hydraulic cylinders. The front hydraulic cylinders are double-acting cylinders. The seat body is installed on the central axis. The seat body is free in the circumferential direction and fixed in the axial direction. The inner gear ring is fixedly connected to the seat body. The cylinder barrels of the two front hydraulic cylinders are installed in the seat body. The two front hydraulic cylinders are symmetrically located on both sides of the central axis. The ends of the cylinder rods on both sides of the two front hydraulic cylinders are commonly fixed with front pressure plates.
[0008] Furthermore, the center shaft is hollow; the oil inlet pipe and the oil return pipe of the rear hydraulic cylinder pass through the center shaft and are connected to the oil port of the cylinder barrel; Furthermore, the seat body is connected to the central shaft through a first rotary joint, and an annular first oil inlet chamber and a first oil return chamber are constructed in the first rotary joint. Oil ports are opened at positions corresponding to the first oil inlet chamber and the first oil return chamber on the central shaft. The oil inlet pipe and the oil return pipe of the front hydraulic cylinder pass through the central shaft and are connected to the oil ports on the central shaft. Oil ports are opened on the first oil inlet chamber and the first oil return chamber, and the oil ports of the cylinder barrels of the two front hydraulic cylinders are connected to the oil ports of the first oil inlet chamber and the first oil return chamber.
[0009] Furthermore, the swing arm is connected to the central shaft through a second rotary joint, and an annular second oil inlet chamber and a second oil return chamber are constructed in the second rotary joint. Oil ports are opened at positions corresponding to the second oil inlet chamber and the second oil return chamber on the central shaft, and the oil inlet pipe and the oil return pipe of the hydraulic motor pass through the central shaft and are connected to the oil ports on the central shaft. Oil ports are opened on the second oil inlet chamber and the second oil return chamber, and the oil ports of the hydraulic motor are connected to the oil ports of the second oil inlet chamber and the second oil return chamber.
[0010] Furthermore, the surface of the rear pressing plate and the front pressing plate connected to the heel tube is a curved surface that matches the inner wall of the heel tube.
[0011] Compared with the prior art, the advantages of the present invention are: The present invention provides a device for disassembling a follower pipe in a fixed-size hole, which completely solves the problem of the risk of collapse of the drainage hole caused by the complete extraction of the follower pipe after the construction of the tunnel advance drainage hole is completed, and the problem of material waste caused by leaving the follower pipe completely in the hole. Traditional follower pipe construction requires the installation of a pipe boot at the end of the follower pipe, and the use of an eccentric drill bit by a horizontal drill to completely extract the follower pipe from the position of the pipe boot, which cannot meet the high-quality and high-efficiency construction requirements of the tunnel advance drainage hole. The device for disassembling a follower pipe in a fixed-size hole of the present invention can disassemble the follower pipe from the pipe, disconnect the threaded connection between the front and rear follower pipes, and pull out the follower pipe section by section, greatly improving the efficiency of disassembling the follower pipe in sections and the quality of the drainage hole wall after disassembling the follower pipe, ensuring that the drainage hole can still drain water normally after the partial segment removal, and avoiding safety risks during the construction process. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the disassembly device inside the pipe sizing hole; Figure 2Schematic diagram of the oil circuit of the front hydraulic cylinder, rear hydraulic cylinder and hydraulic motor.
[0013] In the figure: 1-center axis; 2-front inner support mechanism; 2.1-base; 2.2-front hydraulic cylinder; 2.3-front pressure plate; 3-planetary reducer; 3.1-sun gear; 3.2-planet carrier; 3.3-planetary gear; 3.4-inner ring gear; 4-hydraulic motor; 5-rear inner support mechanism; 5.1-rear hydraulic cylinder; 5.2-rear pressure plate; 6-first rotary joint; 6.1-first oil inlet chamber; 6.2-first oil return chamber; 7-swing arm; 8-second rotary joint; 8.1-second oil inlet chamber; 8.2-second oil return chamber. DETAILED DESCRIPTION
[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0015] like Figure 1 As shown: A disassembly device for the fixed-size hole of a heel tube, comprising a front inner support mechanism 2, a rear inner support mechanism 5 and a torque output mechanism connected by a central axis 1; the front inner support mechanism 2 and the rear inner support mechanism 5 can be extended and retracted along the radial direction of the heel tube, the front inner support mechanism 2 is used to support and fix it in the previous section of the heel tube, and the rear inner support mechanism 5 is used to support and fix it in the next section of the heel tube, and the torque output mechanism uses the rear inner support mechanism 5 as a reaction force support to drive the front inner support mechanism 2 to rotate with the previous section of the heel tube.
[0016] The two adjacent sections of the follower pipe are supported by the front and rear internal support mechanisms respectively, forming a stable two-way fixed support. When the torque output mechanism drives the previous section of the follower pipe to rotate, the rear internal support mechanism provides reaction force support to ensure force balance during the disassembly process. This design allows the follower pipe to be disassembled in sections as needed in the hole, retaining part of the pipe body to maintain the stability of the hole wall, and completely solving the problem of drainage hole collapse caused by complete pipe extraction in the traditional process. Only the follower pipe section that needs to be recycled is removed, and the remaining pipe body is retained in the hole to continue protecting the wall. Compared with the traditional full-pipe retention process, it significantly reduces pipe consumption; compared with the full-pipe extraction process, it avoids the cost of repeated drilling caused by hole collapse.
[0017] The torque output mechanism includes a hydraulic motor 4 and a planetary reducer 3; the sun gear 3.1 of the planetary reducer 3 is coaxial with the central shaft 1; the sun gear 3.1 is fixed to the central shaft 1; the planet carrier 3.2 of the planetary reducer 3 is installed on the central shaft 1, and the planet carrier 3.2 is free in the circumferential direction and fixed in the axial direction; the hydraulic motor 4 is installed on the swing arm 7 on the central shaft 1, the output shaft of the hydraulic motor 4 is connected to one of the planetary gears 3.3 on the planet carrier 3.2, the inner ring gear 3.4 of the planetary reducer 3 is fixedly connected to the front inner support mechanism 2; the planetary gear 3.3 is meshed with the sun gear 3.1 and the inner ring gear 3.4.
[0018] Hydraulic motor 4 drives the planetary gear train. By shifting the speeds of sun gear 3.1, planetary gears 3.3, and internal gear ring 3.4, high-speed, low-torque output is converted into low-speed, high-torque output, meeting the high-torque requirements of threaded pipe removal. Hydraulic motor 4 drives planetary gears 3.3, which rotate around sun gear 3.1. Hydraulic motor 4 rotates swing arm 7 around central axis 1. Planetary gears 3.3 transmit torque to internal gear ring 3.4, which in turn drives the front inner support mechanism 2.
[0019] The rear inner support mechanism 5 includes a rear hydraulic cylinder 5.1, which is a double-acting cylinder. The cylinder barrel of the rear hydraulic cylinder 5.1 is fixedly connected to the central shaft 1, and rear pressure plates 5.2 are fixed to the ends of the cylinder rods on both sides of the rear hydraulic cylinder 5.1.
[0020] The front inner support mechanism 2 includes a seat body 2.1 and two front hydraulic cylinders 2.2. The front hydraulic cylinders 2.2 are double-acting cylinders. The seat body 2.1 is installed on the central axis 1. The seat body 2.1 is free in the circumferential direction and fixed in the axial direction. The inner gear ring 3.4 is fixedly connected to the seat body 2.1. The cylinder barrels of the two front hydraulic cylinders 2.2 are installed in the seat body 2.1. The two front hydraulic cylinders 2.2 are symmetrically located on both sides of the central axis 1. The ends of the cylinder rods on both sides of the two front hydraulic cylinders 2.2 are commonly fixed with front pressure plates 2.3.
[0021] The surface where the rear pressing plate 5.2 and the front pressing plate 2.3 are connected to the heel tube is an arc surface that matches the inner wall of the heel tube, which increases the contact area between the rear pressing plate 5.2 and the front pressing plate 2.3 and the inner wall of the heel tube to prevent slipping; and evenly transmits radial tightening force, effectively adapts to tube wall deformation, and prevents damage to the tube body caused by local stress concentration.
[0022] like Figure 2 As shown: the center shaft 1 is hollow inside; the oil inlet pipe and the oil return pipe of the rear hydraulic cylinder 5.1 pass through the center shaft 1 and are connected to the oil port of the cylinder barrel; The seat body 2.1 is connected to the central shaft 1 through the first rotary joint 6. An annular first oil inlet chamber 6.1 and a first oil return chamber 6.2 are constructed in the first rotary joint 6. Oil ports are opened at positions corresponding to the first oil inlet chamber 6.1 and the first oil return chamber 6.2 on the central shaft 1. The oil inlet pipe and the oil return pipe of the front hydraulic cylinder 2.2 pass through the central shaft 1 and are connected to the oil ports on the central shaft 1. Oil ports are opened on the first oil inlet chamber 6.1 and the first oil return chamber 6.2. The oil ports of the cylinder barrels of the two front hydraulic cylinders 2.2 are connected to the oil ports of the first oil inlet chamber 6.1 and the first oil return chamber 6.2.
[0023] The swing arm 7 is connected to the central shaft 1 through the second rotary joint 8. The second rotary joint 8 is constructed with an annular second oil inlet chamber 8.1 and a second oil return chamber 8.2. Oil ports are opened on the central shaft 1 at positions corresponding to the second oil inlet chamber 8.1 and the second oil return chamber 8.2. The oil inlet pipe and the oil return pipe of the hydraulic motor 4 pass through the central shaft 1 and are connected to the oil ports on the central shaft 1. Oil ports are opened on the second oil inlet chamber 8.1 and the second oil return chamber 8.2. The oil ports of the hydraulic motor 4 are connected to the oil ports of the second oil inlet chamber 8.1 and the second oil return chamber 8.2.
[0024] Central shaft 1 incorporates multiple hydraulic oil channels that coordinate with the annular oil chambers of the first and second rotary joints to continuously supply oil while the front hydraulic cylinder 2.2 and hydraulic motor 4 rotate about central shaft 1. Rotary oil seals are installed between the first and second rotary joints 6, 8, and central shaft 1.
[0025] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is to be construed in the widest manner consistent with the principles and novel features disclosed herein.
Claims
1. A device for dismantling pipes in a sizing hole, characterized by: The invention comprises a front inner support mechanism (2), a rear inner support mechanism (5) and a torque output mechanism connected via a central axis (1); the front inner support mechanism (2) and the rear inner support mechanism (5) can be extended and retracted along the radial direction of the heel tube; the front inner support mechanism (2) is used for supporting and fixing the front heel tube; the rear inner support mechanism (5) is used for supporting and fixing the rear heel tube; the torque output mechanism uses the rear inner support mechanism (5) as a reaction force support to drive the front inner support mechanism (2) to rotate with the front heel tube.
2. The device for dismantling a pipe in a sizing hole according to claim 1, characterized in that: The torque output mechanism includes a hydraulic motor (4) and a planetary reducer (3); the sun gear (3.1) of the planetary reducer (3) is coaxial with the central shaft (1); the sun gear (3.1) is fixed on the central shaft (1); the planetary carrier (3.2) of the planetary reducer (3) is mounted on the central shaft (1), and the planetary carrier (3.2) is circumferentially free and axially fixed; the hydraulic motor (4) is mounted on a swing arm (7) on the central shaft (1), the output shaft of the hydraulic motor (4) is connected to one of the planetary gears (3.3) on the planetary carrier (3.2), the inner gear ring (3.4) of the planetary reducer (3) is fixedly connected to the front inner support mechanism (2); the planetary gear (3.3) is meshed with the sun gear (3.1) and the inner gear ring (3.4).
3. The device for dismantling a pipe in a sizing hole according to claim 2, characterized in that: The rear inner support mechanism (5) includes a rear hydraulic cylinder (5.1), which is a double-acting cylinder. The cylinder barrel of the rear hydraulic cylinder (5.1) is fixedly connected to the central shaft (1), and rear pressure plates (5.2) are fixed to the ends of the cylinder rods on both sides of the rear hydraulic cylinder (5.1).
4. The device for disassembling a pipe in a sizing hole according to claim 3, characterized in that: The front inner support mechanism (2) comprises a seat body (2.1) and two front hydraulic cylinders (2.2), the front hydraulic cylinders (2.2) being double-acting cylinders, the seat body (2.1) being mounted on the central shaft (1), the seat body (2.1) being circumferentially free and axially fixed, and the inner gear ring (3.4) being fixedly connected to the seat body (2.1); the cylinder barrels of the two front hydraulic cylinders (2.2) being mounted in the seat body (2.1), the two front hydraulic cylinders (2.2) being symmetrically located on both sides of the central shaft (1), and the ends of the cylinder rods on both sides of the two front hydraulic cylinders (2.2) being fixed with a front pressure plate (2.3) in common.
5. The device for disassembling a pipe in a sizing hole according to claim 4, characterized in that: The central shaft (1) is hollow inside; the oil inlet pipe and the oil return pipe of the rear hydraulic oil cylinder (5.1) pass through the central shaft (1) and are connected to the oil port of the cylinder barrel.
6. The device for disassembling a pipe in a sizing hole according to claim 5, characterized in that: The seat body (2.1) is connected to the central shaft (1) via a first rotary joint (6); an annular first oil inlet chamber (6.1) and a first oil return chamber (6.2) are constructed in the first rotary joint (6); oil ports are opened on the central shaft (1) at positions corresponding to the first oil inlet chamber (6.1) and the first oil return chamber (6.2); the oil inlet pipe and the oil return pipe of the front hydraulic oil cylinder (2.2) pass through the central shaft (1) and are connected to the oil ports on the central shaft (1); the first oil inlet chamber (6.1) and the first oil return chamber (6.2) are opened with oil ports; the oil ports of the cylinder barrels of the two front hydraulic oil cylinders (2.2) are connected to the oil ports of the first oil inlet chamber (6.1) and the first oil return chamber (6.2).
7. The device for disassembling a pipe in a sizing hole according to claim 5, characterized in that: The swing arm (7) is connected to the central shaft (1) through a second rotary joint (8); an annular second oil inlet chamber (8.1) and a second oil return chamber (8.2) are constructed in the second rotary joint (8); oil ports are opened on the central shaft (1) at positions corresponding to the second oil inlet chamber (8.1) and the second oil return chamber (8.2); an oil inlet pipe and an oil return pipe of the hydraulic motor (4) pass through the central shaft (1) and are connected to the oil ports on the central shaft (1); oil ports are opened on the second oil inlet chamber (8.1) and the second oil return chamber (8.2); and the oil port of the hydraulic motor (4) is connected to the oil ports of the second oil inlet chamber (8.1) and the second oil return chamber (8.2).
8. The device for disassembling a pipe in a sizing hole according to claim 4, characterized in that: The surfaces of the rear pressing plate (5.2) and the front pressing plate (2.3) that are connected to the heel tube are arc surfaces that match the inner wall of the heel tube.