Pipe jacking device and pipe jacking method

Abstract

This invention relates to a pipe jacking device and its installation method. A planar four-bar linkage A and a hydraulic cylinder A are both located between upper and lower jacks. Two sets of pins at opposite hinge points of the planar four-bar linkage A are connected to the upper and lower jacks respectively, while another set of pins at opposite hinge points are hinged to the piston rod and cylinder body of the hydraulic cylinder A. The hydraulic cylinder A drives the upper jack to extend and retract relative to the lower jack via the planar four-bar linkage A. A groove is formed on the inner wall of the axial section of the liner. Two sets of pins at opposite hinge points of the planar four-bar linkage B are hinged to the piston rod and cylinder body of the hydraulic cylinder C respectively. During the pipe jacking process, the pins at the other set of pins engage with the groove via the drive of the hydraulic cylinder C. The piston rod or cylinder body of the hydraulic cylinder B is connected to the pipe jacking section, and the cylinder body or piston rod of the hydraulic cylinder B is hinged to the cylinder body of the hydraulic cylinder C. This invention eliminates the need for excavators to dig up the road surface for pipe replacement, thus avoiding disruption to road traffic and the surrounding environment, and saving costs.

Description

Technical Field

[0001] This invention belongs to the field of urban construction pipeline maintenance, specifically a pipe jacking device and its pipe jacking method. Background Technology

[0002] In urban construction, many pipelines are laid underground. When pipelines have been in use for a long time, or when they are deformed due to external forces, they need to be repaired.

[0003] Currently, the method for dealing with deformed pipes involves using an excavator to dig up the road surface at the deformation point and then replacing the pipe. This existing method is labor-intensive, the noise from the excavator affects the surrounding environment, the excavated road surface also impacts the environment, and the construction cost is high. Summary of the Invention

[0004] In order to solve the above-mentioned problems in existing methods for handling pipeline deformation, the present invention aims to provide a pipe jacking device and a pipe jacking method for pipelines.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] The pipe jacking device of the present invention includes a pipe jacking section and a pipe loading section. The pipe jacking section includes an upper jack, a lower jack, a planar four-bar linkage A, and a hydraulic cylinder A. The planar four-bar linkage A and the hydraulic cylinder A are both located between the upper jack and the lower jack. A set of pins at two opposite hinge points of the planar four-bar linkage A are respectively connected to the upper jack and the lower jack. Another set of pins at two opposite hinge points of the planar four-bar linkage A are respectively hinged to the piston rod and cylinder body of the hydraulic cylinder A. The hydraulic cylinder A drives the upper jack to extend and retract relative to the lower jack via the planar four-bar linkage A. The pipe loading section includes a liner and a section located on the liner. The internal hydraulic cylinders B and C, and the planar four-bar linkage B, have slots on the upper and lower inner walls of the axial section of the liner. The pins at two opposite hinge points of the planar four-bar linkage B are respectively hinged to the piston rod and cylinder body of the hydraulic cylinder C. The pins at two opposite hinge points of the planar four-bar linkage B are inserted into the slots and engaged with the slots by the drive of the hydraulic cylinder C during the process of dragging the pipe installation part in the jacking pipe part. The piston rod or cylinder body of the hydraulic cylinder B is connected to the jacking pipe part, and the cylinder body or piston rod of the hydraulic cylinder B is hinged to the cylinder body of the hydraulic cylinder C.

[0007] Wherein: the front end and / or rear end between the upper and lower tops are provided with guide sleeves and guide posts, the lower surface of the upper top is fixedly connected with a guide sleeve or a guide post, the upper surface of the lower top is fixedly connected with a guide post or a guide sleeve, the guide post is inserted in the guide sleeve, and the guide post always partially overlaps with the guide sleeve during the process of the upper top being driven to extend and retract relative to the lower top by the oil cylinder A.

[0008] The upper surface of the upper top and the lower surface of the lower top are both arc surfaces, and the lower surface of the upper top and the upper surface of the lower top are both planes. In the initial state, the diameter of the circle containing the arc surface of the upper top and the arc surface of the lower top is less than the spatial height of the pipe deformation point. When the upper top extends radially outward to its limit position relative to the lower top, the diameter of the circle containing the arc surface of the upper top and the arc surface of the lower top is greater than or equal to the outer diameter of the liner.

[0009] The planar four-bar linkage A includes connecting rods A, B, C, and D of equal length. One end of connecting rod A and one end of connecting rod B are hinged together by pin A. One end of connecting rod C and one end of connecting rod D are hinged together by pin D. The other end of connecting rod A and the other end of connecting rod C are hinged together by pin B. Pin B is connected to the upper top. The other end of connecting rod B and the other end of connecting rod D are hinged together by pin C. Pin C is connected to the lower top. The piston rod or cylinder body of the hydraulic cylinder A is hinged together with pin A. The cylinder body or piston rod of the hydraulic cylinder A is hinged together with pin D.

[0010] The jacking section is equipped with a pull ring for connecting to the traction rope.

[0011] The planar four-bar linkage B includes connecting rods E, F, G, and H of equal length. One end of connecting rod E is hinged to one end of connecting rod F via pin E. One end of connecting rod G is hinged to one end of connecting rod H via pin H. The other end of connecting rod E is hinged to the other end of connecting rod G via pin F. The other end of connecting rod F is hinged to the other end of connecting rod H via pin G. The piston rod and cylinder body of the hydraulic cylinder C are respectively hinged to pins E and H.

[0012] During the process of dragging the pipe installation section in the jacking section, the pins F and G are respectively inserted into two slots on the inner wall of the liner and engaged with the slots by the drive of the oil cylinder C.

[0013] The end of the liner facing the top pipe section is chamfered.

[0014] The present invention relates to a pipe jacking method for a pipe jacking device for pipelines, comprising the following steps:

[0015] Step 1, initial state: the piston rod of the hydraulic cylinder A extends, causing the upper part to be in a retracted state; the piston rod of the hydraulic cylinder C retracts, driving the planar four-bar linkage B, causing the pins at the two opposite hinges of the planar four-bar linkage B to be inserted into the slot.

[0016] Step 2: Pull the jacking pipe installer inside the deformed pipe until the jacking pipe reaches the deformed part of the pipe;

[0017] Step 3: The piston rod of the hydraulic cylinder A retracts, and the upper pusher extends radially outward relative to the lower pusher through the planar four-bar linkage A until the upper pusher lifts up the deformed part of the pipe.

[0018] Step four: Pull the jacking pipe section again to move it a set distance; during the movement, the piston rod of the hydraulic cylinder B extends.

[0019] Step 5: The piston rod of the hydraulic cylinder B retracts, causing the pipe-loading section to move a set distance toward the top pipe section;

[0020] Step six: Repeat steps four and five until the liner moves to the deformed part of the pipe and supports the deformed part;

[0021] Step 7: The piston rod of the hydraulic cylinder C retracts, and the pins at the two opposite hinges of the planar four-bar linkage B move downward from their respective slots; the piston rod of the hydraulic cylinder A extends and is driven to retract and reset by the planar four-bar linkage A.

[0022] Step 8: Pull the jacking pipe section to remove the hydraulic cylinders B and C and the planar four-bar linkage B from the deformed part of the pipe. The liner pipe remains in the pipe to support the original deformed part of the pipe.

[0023] Wherein: the lower top is in contact with the inner wall of the pipe throughout the entire process.

[0024] The advantages and positive effects of this invention are as follows:

[0025] This invention only requires moving the jacking section and the installation section inside the pipeline to the deformed area. The deformed area can be lifted and repaired by the cooperation of the jacking section and the installation section. There is no need to dig up the road surface with an excavator to replace the pipe. This will not affect road traffic and the surrounding living environment, and it will save costs by eliminating the need to replace the pipe. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the pipe jacking device of the present invention;

[0027] Figure 2 This is a front view of the structure of the pipe jacking device of the present invention;

[0028] Figure 3 for Figure 2 Sectional view A-A;

[0029] Figure 4 This is a top view of the structure of the pipe jacking device of the present invention;

[0030] Figure 5 for Figure 4 B-B sectional view;

[0031] Wherein: 1 is the upper pusher, 2 is the lower pusher, 3 is the pull ring, 4 is the guide sleeve, 5 is the guide post, 6 is the hydraulic cylinder A, 7 is the pin A, 8 is the connecting rod A, 9 is the connecting rod B, 10 is the connecting rod C, 11 is the connecting rod D, 12 is the pin B, 13 is the pin C, 14 is the pin D, 15 is the hydraulic cylinder B, 16 is the hydraulic cylinder C, 17 is the liner, 18 is the connecting rod E, 19 is the connecting rod F, 20 is the connecting rod G, 21 is the connecting rod H, 22 is the pin E, 23 is the pin F, 24 is the pin G, 25 is the pin H, and 26 is the slot. Detailed Implementation

[0032] The invention will now be described in further detail with reference to the accompanying drawings.

[0033] like Figures 1-5 As shown, the pipe jacking device of the present invention includes a pipe jacking section and a pipe loading section. The pipe jacking section includes an upper jack 1, a lower jack 2, a planar four-bar linkage A, and a hydraulic cylinder A6. The planar four-bar linkage A and the hydraulic cylinder A6 are both located between the upper jack 1 and the lower jack 2. A set of pins at two opposite hinge points of the planar four-bar linkage A are respectively connected to the upper jack 1 and the lower jack 2. Another set of pins at two opposite hinge points of the planar four-bar linkage A are respectively hinged to the piston rod and the cylinder body of the hydraulic cylinder A6. The hydraulic cylinder A6 drives the upper jack 1 to extend and retract relative to the lower jack 2 through the planar four-bar linkage A. The pipe loading section includes a liner 17 and a section located on the liner 17. The internal hydraulic cylinders B15 and C16, and the planar four-bar linkage B, both have slots 26 on the upper and lower inner walls of the axial section of the liner 17. The pins at two opposite hinge points of the planar four-bar linkage B are respectively hinged to the piston rod and cylinder body of the hydraulic cylinder C16. The pins at two opposite hinge points of the planar four-bar linkage B are inserted into the slots 26 and engaged with the slots 26 by the drive of the hydraulic cylinder C16 during the process of dragging the pipe installation part in the jacking pipe part. The piston rod or cylinder body of the hydraulic cylinder B15 is connected to the jacking pipe part, and the cylinder body or piston rod of the hydraulic cylinder B15 is hinged to the cylinder body of the hydraulic cylinder C16.

[0034] The front end and / or rear end between the upper top 1 and the lower top 2 are provided with guide sleeves 4 and guide posts 5. In this embodiment, a set of guide sleeves 4 and guide posts 5 are provided at each of the front and rear ends between the upper top 1 and the lower top 2. The lower surface of the upper top 1 is fixedly connected with guide sleeves 4 or guide posts 5, and the upper surface of the lower top 2 is fixedly connected with guide posts 5 or guide sleeves 4. The guide posts 5 are inserted in the guide sleeves 4. During the process of the upper top 1 being driven to extend and retract relative to the lower top 2 by the oil cylinder A6, the guide posts 5 always partially overlap with the guide sleeves 4.

[0035] In this embodiment, the upper surface of the upper top 1 and the lower surface of the lower top 2 are both arc surfaces, and the lower surface of the upper top 1 and the upper surface of the lower top 2 are both planes. In the initial state, the diameter of the circle containing the arc surface of the upper top 1 and the arc surface of the lower top 2 is smaller than the spatial height of the pipe deformation point, so as to ensure that the jacking part can extend to below the pipe deformation point. When the upper top 1 extends radially outward to the limit position relative to the lower top 2, the diameter of the circle containing the arc surface of the upper top 1 and the arc surface of the lower top 2 is greater than or equal to the outer diameter of the liner 17, so as to ensure that the pipe installation part moves to below the deformation point lifted by the jacking part.

[0036] The planar four-bar linkage A of this embodiment includes connecting rods A8, B9, C10, and D11 of equal length. One end of connecting rod A8 and one end of connecting rod B9 are hinged by pin A7. One end of connecting rod C10 and one end of connecting rod D11 are hinged by pin D14. The other end of connecting rod A8 and the other end of connecting rod C10 are hinged by pin B12, which is connected to the upper top 1. The other end of connecting rod B9 and the other end of connecting rod D11 are hinged by pin C13, which is connected to the lower top 2. The piston rod or cylinder body of hydraulic cylinder A6 (piston rod in this embodiment) is hinged to pin A7, and the cylinder body or piston rod of hydraulic cylinder A6 (cylinder body in this embodiment) is hinged to pin D14. Link A8 is parallel to link D11, and link B9 is parallel to link C10. Links A8, B9, C10 and D11 always maintain a rhomboid shape.

[0037] The guide sleeve 4 or the lower jacking section 2 may be provided with a pull ring 3 for connecting with the traction rope. In this embodiment, the pull ring 3 is fixed on the guide sleeve 4 at the front end of the jacking section. One end of the traction rope is tied to the pull ring 3, and the other end can be pulled manually or by an automatic trolley inside the pipe.

[0038] The planar four-bar linkage B of this embodiment includes connecting rods E18, F19, G20, and H21 of equal length. One end of connecting rod E18 and one end of connecting rod F19 are hinged by pin E22. One end of connecting rod G20 and one end of connecting rod H21 are hinged by pin H25. The other end of connecting rod E18 and the other end of connecting rod G20 are hinged by pin F23. The other end of connecting rod F19 and the other end of connecting rod H21 are hinged by pin G24. The piston rod and cylinder body of cylinder C16 are hinged to pins E22 and H25, respectively. Connecting rod E18 and connecting rod H21 are parallel, and connecting rod F19 and connecting rod G20 are parallel. Connecting rods E18, F19, G20, and H21 always maintain a rhomboid shape. During the process of dragging the pipe installation section in the jacking section, pins F23 and G24 are respectively inserted into the two slots 26 on the inner wall of the liner 17 and engaged with the slots 26 by the drive of the oil cylinder C16.

[0039] In this embodiment, the piston rod of cylinder B15 is connected to the guide sleeve 4 at the rear end between the upper push 1 and the lower push 2, and the cylinder body of cylinder B15 is hinged to the cylinder body of cylinder C16.

[0040] In this embodiment, the end of the liner 17 facing the top tube portion is chamfered to facilitate movement to below the original deformed area that is lifted by the top tube portion.

[0041] In this embodiment, the liner 17, the upper top 1, and the lower top 2 are all made of No. 45 steel. The outer surface of the liner 17, the arc surface of the upper top 1, and the arc surface of the lower top 2 are all hot-dip galvanized for rust prevention.

[0042] The pipe jacking method of the pipe jacking device of the present invention includes the following steps:

[0043] Step 1, initial state: the piston rod of cylinder A6 extends, causing the upper top 1 to be in the retracted state; the piston rod of cylinder C16 retracts, driving the planar four-bar linkage B, causing the pins at the two opposite hinges of the planar four-bar linkage B to be inserted into the slot 26.

[0044] Step 2: Pull the pipe jacking device inside the deformed pipe until the jacking section reaches the deformed part of the pipe; pulling can be done manually or by an automatic trolley.

[0045] Step 3: The piston rod of cylinder A6 retracts, and through the planar four-bar linkage A, the upper pusher 1 extends radially outward relative to the lower pusher 2 until the upper pusher 1 lifts up the deformed part of the pipe.

[0046] Step 4: Pull the jacking pipe section again to move it a set distance; during the movement, the piston rod of cylinder B15 extends.

[0047] Step 5: The piston rod of cylinder B15 retracts, causing the pipe-loading section to move a set distance towards the top pipe section;

[0048] Step six, repeat steps four and five until the liner 17 moves to the deformed part of the pipe and supports the deformed part;

[0049] Step 7: The piston rod of cylinder C16 extends, and the pins at the two opposite hinges in the planar four-bar linkage B move downward from their respective slots 26; the piston rod of cylinder A6 extends, and drives the upper push 1 to retract and reset through the planar four-bar linkage A.

[0050] Step 8: Pull the jacking pipe section to remove the hydraulic cylinders B15 and C16 and the planar four-bar linkage B from the deformed part of the pipe. The liner 17 remains in the pipe to support the original deformed part of the pipe. The lower jacking pipe 2 is in contact with the inner wall of the pipe throughout the entire process so that the upper jacking pipe 1 can extend and retract relative to the lower jacking pipe 2.

Claims

1. A pipe jacking device for pipelines, characterized in that: The system includes a jacking section and a pipe mounting section. The jacking section includes an upper jack (1), a lower jack (2), a planar four-bar linkage A, and a hydraulic cylinder A (6). The planar four-bar linkage A and the hydraulic cylinder A (6) are located between the upper jack (1) and the lower jack (2). The pins at two opposite hinge points of the planar four-bar linkage A are connected to the upper jack (1) and the lower jack (2) respectively. The pins at two opposite hinge points of the planar four-bar linkage A are hinged to the piston rod and cylinder body of the hydraulic cylinder A (6) respectively. The hydraulic cylinder A (6) drives the upper jack (1) to extend and retract relative to the lower jack (2) through the planar four-bar linkage A. A set of guide sleeves (4) and guide posts (5) are provided at the front end and rear end of the upper jack (1) and the lower jack (2) respectively. The upper jack (1) A guide sleeve (4) or a guide post (5) is fixedly connected to the lower surface. A guide post (5) or a guide sleeve (4) is fixedly connected to the upper surface of the lower top (2). The guide post (5) is inserted into the guide sleeve (4). The guide post (5) always partially overlaps with the guide sleeve (4) during the extension and retraction of the upper top (1) relative to the lower top (2) driven by the oil cylinder A (6). The upper surface of the upper top (1) and the lower surface of the lower top (2) are both arc surfaces. The lower surface of the upper top (1) and the upper surface of the lower top (2) are both planes. The diameter of the arc surface of the upper top (1) and the arc surface of the lower top (2) in the initial state is smaller than the spatial height of the pipe deformation point. When the upper top (1) extends radially outward to the limit position relative to the lower top (2), the circle of the upper top (1) The diameter of the circle containing the arc surface of the lower top (2) is greater than or equal to the outer diameter of the liner (17); the planar four-bar linkage A includes connecting rods A (8), B (9), C (10) and D (11) of equal length. One end of connecting rod A (8) and connecting rod B (9) is hinged by pin A (7), one end of connecting rod C (10) and connecting rod D (11) is hinged by pin D (14), the other end of connecting rod A (8) and the other end of connecting rod C (10) are hinged by pin B (12), pin B (12) is connected to the upper top (1), the other end of connecting rod B (9) and the other end of connecting rod D (11) are hinged by pin C (13), pin C (13) is connected to On the lower top (2), the piston rod or cylinder body of the oil cylinder A (6) is hinged to the pin A (7), the cylinder body or piston rod of the oil cylinder A (6) is hinged to the pin D (14), the connecting rod A (8) is parallel to the connecting rod D (11), the connecting rod B (9) is parallel to the connecting rod C (10), and the connecting rods A (8), B (9), C (10) and D (11) always maintain a rhomboid shape; the tube assembly includes a liner (17) and oil cylinders B (15), C (16) and a planar four-bar linkage B located inside the liner (17). The upper inner wall and lower inner wall of the axial section of the liner (17) are provided with slots (26), and the end of the liner (17) facing the top tube is provided with a chamfer;The planar four-bar linkage B includes links E (18), F (19), G (20), and H (21) of equal length. One end of link E (18) is hinged to one end of link F (19) via pin E (22), and one end of link G (20) is hinged to one end of link H (21) via pin H (25). The other end of link E (18) is hinged to the other end of link G (20) via pin F (23), and the other end of link F (19) is hinged to the other end of link H (21) via pin G (24). Links E (18) and H (21) are parallel, and links F (19) and G (20) are parallel. The connecting rods E (18), F (19), G (20), and H (21) always maintain a rhomboid shape; the piston rod and cylinder body of the hydraulic cylinder C (16) are hinged to pins E (22) and H (25) respectively; pins F (23) and G (24) are driven by the hydraulic cylinder C (16) during the process of dragging the pipe installation part in the top pipe section and are respectively inserted into the two slots (26) on the inner wall of the liner (17) and engaged with the slots (26); the piston rod of the hydraulic cylinder B (15) is connected to the guide sleeve (4) at the rear end between the upper top (1) and the lower top (2); the cylinder body of the hydraulic cylinder B (15) is hinged to the cylinder body of the hydraulic cylinder C (16).

2. A pipe jacking method for a pipe jacking device as described in claim 1, characterized in that: Includes the following steps: Step 1, initial state: the piston rod of the oil cylinder A (6) extends, so that the upper top (1) is in the retracted state, the piston rod of the oil cylinder C (16) retracts, driving the planar four-bar linkage B, so that the pin F (23) and pin G (24) are respectively inserted into the two slots (26) on the inner wall of the liner (17); Step 2: Pull the jacking pipe installer inside the deformed pipe until the jacking pipe reaches the deformed part of the pipe. The lower jacking (2) is in contact with the inner wall of the pipe throughout the entire process. Step 3: The piston rod of the oil cylinder A (6) retracts and drives the upper pusher (1) to extend radially outward relative to the lower pusher (2) through the planar four-bar linkage A until the upper pusher (1) lifts up the deformed part of the pipe; Step 4: Pull the top pipe section again to move the top pipe section a set distance; during the movement, the piston rod of the oil cylinder B (15) extends; Step 5: The piston rod of the oil cylinder B (15) retracts, causing the pipe-loading part to move a set distance toward the top pipe part; Step six, repeat steps four and five until the liner (17) moves to the deformed part of the pipe and supports the deformed part; Step 7: The piston rod of the hydraulic cylinder C (16) extends out, and the pins F (23) and G (24) move downward from their respective slots (26); the piston rod of the hydraulic cylinder A (6) extends out and drives the upper push (1) to retract and reset through the planar four-bar linkage A; Step 8: Pull the jacking pipe section to remove the cylinders B (15), C (16) and the planar four-bar linkage B from the pipe deformation point in the jacking pipe section and the pipe installation section. The liner (17) remains in the pipe to support the original deformation point of the pipe.

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