Device and method for removing a used pipeline

Abstract

The application belongs to the technical field of underground engineering construction, and discloses a waste pipeline pulling device and a pulling method. The pulling device comprises a grouting pipe and a separation assembly. One end of the grouting pipe is closed. Multiple groups of the separation assembly are arranged along the axial direction of the grouting pipe. The separation assembly comprises two air bags and an air pipe in communication with the air bags. The two air bags are arranged on the outer wall of the grouting pipe in a sleeved manner along the axial direction of the grouting pipe. The grouting pipe is provided with a grouting hole between the two air bags of the same separation assembly. The inflated air bags can separate the waste pipeline into multiple grouting sections. By injecting grouting material into the grouting sections, the waste pipeline and the grouting pipe can be fixed together. By pulling the grouting pipe, the waste pipeline can be pulled out in a non-excavation manner, and the influence on the surrounding environment is small.

Description

Technical Field

[0001] This invention relates to the field of underground engineering construction technology, and in particular to a device and method for removing abandoned pipes. Background Technology

[0002] Trenchless construction techniques are widely used in the construction of underground pipelines. Because pipelines have a limited lifespan, old pipelines need to be replaced or removed before their lifespan expires. Currently, known methods for replacing old underground pipelines in cities include: trenching and re-burying new pipes, and pipe bursting (pipe expansion) methods.

[0003] The method of re-laying new pipes by trenching can directly remove the old pipes. However, this method has the disadvantages of large-scale engineering and high investment. It not only damages existing infrastructure but also easily causes large-scale traffic congestion, seriously affecting residents' normal work and life, and damaging the environment. The pipe-breaking method uses a drilling rig with a pipe-breaking head to break the old pipes and squeeze the pipe fragments into the surrounding soil, while simultaneously pulling in a new pipe, completing the process of discarding the old pipe and laying the new pipe in one go. The disadvantages of this method are that the compression and vibration during the breaking of the old pipes can cause public hazards to buildings around the city. The broken old pipes and the crude oil mud and other waste and dirt left in the pipes remain in the soil, polluting the surface soil layer. Some non-degradable substances can affect plant growth and the ecological environment. Summary of the Invention

[0004] One of the objectives of this invention is to provide a device for removing abandoned pipes, which can remove abandoned pipes in a trenchless manner, thereby reducing the impact on the surrounding environment.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A device for removing abandoned pipes includes a grouting pipe and a separating assembly. One end of the grouting pipe is closed. Multiple sets of separating assemblies are arranged at intervals along the axial direction of the grouting pipe. Each separating assembly includes two air bladders and an air pipe communicating with the air bladders. The two air bladders are sleeved on the outer wall of the grouting pipe at intervals along the axial direction of the grouting pipe. A grouting hole is provided between the two air bladders of the same separating assembly in the grouting pipe.

[0007] Preferably, the air tube is fixedly inserted into the grouting pipe along the axial direction. The air tube includes a main pipe and branch pipes. A plurality of branch pipes are arranged in a one-to-one correspondence with the airbag. One end of the branch pipe is connected to the main pipe, and the other end of the branch pipe passes through the grouting pipe and is connected to the airbag.

[0008] Preferably, the system also includes pulley blocks, wherein multiple pulley blocks are fixed along the axial direction of the grouting pipe to the outer wall of the grouting pipe, and each pulley block includes two pulleys.

[0009] Preferably, the pulley assembly and the separator assembly are arranged alternately.

[0010] Preferably, the pulley assembly is fixed to the grouting pipe by a clamp. The clamp includes a first base and a second base. Both ends of the first base and the second base are provided with connecting ears. The first base and the second base are connected by fasteners passing through the connecting ears.

[0011] Preferably, the airbag is adhered to the outer wall of the grouting pipe.

[0012] Another objective of this invention is to provide a method for removing obsolete pipes, which is achieved using the aforementioned obsolete pipe removal device, and specifically includes the following steps:

[0013] Manufacturing the aforementioned waste pipe removal device;

[0014] The waste pipe removal device is pushed into the waste pipe along its axial direction.

[0015] Inflate the trachea until the airbag comes into contact with the inner wall of the discarded pipe;

[0016] Grouting material is injected into the grouting pipe, and the grouting material enters between the two air bladders of the same group of separator components through the grouting hole. After the grouting material solidifies, the grouting pipe and the waste pipe are fixed together.

[0017] Pull the grouting pipe and remove the old pipe.

[0018] Preferably, the grouting pipe is coaxial with the waste pipe after entering the waste pipe.

[0019] Preferably, before manufacturing the waste pipe removal device, the damaged part inside the waste pipe is located by a detection device. When manufacturing the waste pipe removal device, the distance between the two airbags in the same group is limited according to the location of the damaged part, and the distance between the two airbags is greater than the width of the damaged part.

[0020] Preferably, the grouting material is cement mortar.

[0021] The beneficial effects of the present invention are as follows: The waste pipe removal device of the present invention can use an inflatable airbag to divide the waste pipe into multiple grouting sections and inject grout into the grouting sections to fix the grouting pipe to the waste pipe. It can balance the tension on the waste pipe and remove the waste pipe by dragging the grouting pipe, with little impact on the surrounding environment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the waste pipe removal device in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the installation structure of the pulley block in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the installation structure of the separator component in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a grouting pipe structure with grouting holes in an embodiment of the present invention;

[0026] Figure 5 This is a construction diagram illustrating the removal of old pipes using a waste pipe removal device.

[0027] In the picture:

[0028] 1. Grouting pipe; 11. Grouting hole; 2. Airbag; 3. Air pipe; 31. Main pipe; 32. Branch pipe; 4. Pulley; 5. Clamp; 51. First base; 52. Second base; 6. Mounting rod; 7. Waste pipe; 8. Grouting material. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0030] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0033] Degraded pipes often break and lose strength due to prolonged use, making them unable to withstand significant tensile forces. Direct removal is often insufficient for complete removal. Therefore, methods such as trenching and re-burying new pipes or pipe cracking are frequently used. However, both of these methods cause environmental disturbance, and pipe cracking can also lead to pollution. Therefore, this invention proposes a device for removing degraded pipes without excavation. This method minimizes environmental disturbance and leaves no broken old pipe fragments, crude oil sludge, or other waste residue in the soil, thus preventing environmental pollution.

[0034] Figures 1-5 The illustration shows a waste pipe removal device proposed in an embodiment of the present invention. The removal device includes a grouting pipe 1 and a separation component. One end of the grouting pipe 1 is closed, and the other end is connected to an external grouting device. Multiple sets of separation components are arranged at intervals along the axial direction of the grouting pipe 1. The separation component includes two air bladders 2 and an air pipe 3 communicating with the air bladders 2. The two air bladders 2 are sleeved on the outer wall of the grouting pipe 1 at intervals along the axial direction of the grouting pipe 1. The grouting pipe 1 has at least one grouting hole 11 between the two air bladders 2 of the same separation component.

[0035] In this embodiment, the grouting pipe 1 can be inserted into the waste pipe 7. Air is inflated into the airbag 2 using the air pipe 3 to divide the waste pipe 7 into multiple grouting sections. Grouting material 8 is injected into the grouting pipe 1, entering the grouting section through the grouting hole 11. After the grouting material 8 solidifies and reaches its strength, it tightly bonds the grouting pipe 1 to the waste pipe 7, balancing the tensile force on the waste pipe 7. By pulling the grouting pipe 1, the waste pipe 7 can be quickly and efficiently removed as a whole, with minimal impact on the surrounding environment. It is understood that the length of the grouting pipe 1 should be similar to or the same as the length of the waste pipe 7 to create a relatively balanced tensile force on the waste pipe 7.

[0036] In this embodiment, the air pipe 3 is axially fixedly inserted into the grouting pipe 1 so that it enters the waste pipe 7 together with the grouting pipe 1. The air pipe 3 includes a main pipe 31 and branch pipes 32. The main pipe 31 is inserted into the grouting pipe 1 axially and is closed at one end. Multiple branch pipes 32 are arranged one-to-one with the airbags 2. One end of the branch pipe 32 is connected to the main pipe 31, and the other end extends radially out of the grouting pipe 1 and is connected to the airbags 2. The airbags 2 can be fixed to the outer wall of the grouting pipe 1 by adhesive to prevent the airbags 2 from moving axially along the grouting pipe 1. Optionally, two air pipes 3 are provided, and the two air pipes 3 are arranged opposite each other in the grouting pipe 1 to improve the inflation speed and the consistency of inflation of each part of the airbags 2, thereby improving the sealing between two adjacent airbags 2 and reducing the leakage of grouting fluid during the later grouting process.

[0037] To reduce costs, the grouting pipe 1 also functions as a dragging pipe, directly pushing or dragging it when entering and removing the old pipe 7. To reduce friction when the grouting pipe 1 enters the old pipe 7, a pulley system is installed on it. Multiple pulley systems are spaced apart along the axial direction of the grouting pipe 1, with each pulley system including two pulleys 4. Optionally, the pulley systems are alternately arranged with the separating components, meaning the pulley systems avoid the grouting section. This arrangement allows the pulleys 4 to be removed and reused after the old pipe 7 is removed.

[0038] Specifically, the pulley block is fixed to the grouting pipe 1 by a clamp 5. The clamp 5 has a split structure, including a first base 51 and a second base 52. The first base 51 and the second base 52 have the same structure, both being semi-circular. Both ends of the first base 51 and the second base 52 are provided with connecting ears. The connection between the first base 51 and the second base 52 is achieved by fasteners passing through the connecting ears. The first base 51 and the second base 52 enclose and tighten the grouting pipe 1. In this embodiment, the clamp 5 is also provided with a mounting rod 6, which can limit the distance between the pulley 4 and the grouting pipe 1, making the grouting pipe 1 coaxial with the waste pipe 7.

[0039] Another embodiment of the present invention provides a method for removing abandoned pipes, which is implemented using the aforementioned abandoned pipe removal device. The removal method specifically includes the following steps:

[0040] S1. Manufacturing a device for removing discarded pipes.

[0041] S2. Using a jacking device, the old pipe removal device is pushed axially into the old pipe 7 until the tail end of the grouting pipe 1 is close to the tail end of the old pipe 7. The grouting pipe 1 is coaxial with the old pipe 7. The jacking device includes a driving component and a connecting component. The connecting component connects the driving component and the grouting pipe 1. Under the action of the driving component, the grouting pipe 1 is gradually pushed into the old pipe 7. The jacking device is existing technology and will not be further described here.

[0042] S3. Inflate the air tube 3 with an inflation device. The gas in the air tube 3 enters the air bag 2, and the air bag 2 comes into contact with the inner wall of the old pipe 7.

[0043] S4. Grouting material 8 is injected into grouting pipe 1 using a grouting device. The grouting material 8 enters between the two airbags 2 of each group of separator components through grouting holes 11. The grouting material 8 solidifies rapidly, fixing grouting pipe 1 and waste pipe 7 together. The inflation device can be an air pump or other inflation structure. It is understood that a switch valve is installed between the air pump and the air pipe 3. After the airbag 2 is inflated, the connection between the air pipe 3 and the air pump is blocked by the switch valve, so that the gas will not flow back, ensuring that the airbag 2 is always in an inflated state.

[0044] Grouting material 8 is a mixed slurry with high viscosity, low density, and rapid setting, such as cement mortar. Accelerators can also be mixed into the cement mortar to shorten the setting speed and improve construction efficiency.

[0045] S5. Use a tractor to pull the grouting pipe 1 and remove the old pipe 7. A tractor unit can be used as the tractor.

[0046] The aforementioned method for removing the abandoned pipe 7 can segment and seal the abandoned pipe 7, filling and consolidating it to balance the tensile force on the pipe, thus enabling rapid and efficient trenchless removal of the abandoned pipe 7. To improve the tensile strength of severely damaged sections of the abandoned pipe 7 (hereinafter referred to as damaged sections), before manufacturing the pipe removal device, a detection device can be used to locate the damaged sections within the abandoned pipe 7. During the manufacturing of the pipe removal device, the distance between the two airbags 2 in the same group is limited based on the location of the damaged sections, ensuring that the distance between the two airbags 2 is greater than the axial width of the damaged section. The subsequent grouting material 8 not only connects the grouting pipe 1 and the abandoned pipe 7 but also connects the sections of the abandoned pipe 7 on both sides of the damaged section, thereby improving the overall tensile strength of the abandoned pipe 7. Simultaneously, the detection device can also obtain the burial depth and material of the abandoned pipe 7. These parameters can be used to determine the distance between adjacent separating components, ensuring that the removal cost is reduced while successfully removing the abandoned pipe 7. For example, a CCTV pipe robot can be used as the detection device. CCTV pipe robots are existing technology and will not be described in detail in this embodiment. When pushing the old pipe removal device into the old pipe, make sure that the separator is facing the damaged part.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for removing abandoned pipes, implemented using an abandoned pipe removal device, characterized in that, The waste pipe removal device includes: Grouting pipe (1), one end of which is closed; The separating components are arranged in multiple sets at intervals along the axial direction of the grouting pipe (1). The separating components include two air bladders (2) and an air pipe (3) communicating with the air bladders (2). The two air bladders (2) are sleeved on the outer wall of the grouting pipe (1) at intervals along the axial direction of the grouting pipe (1). The grouting pipe (1) has a grouting hole (11) between the two airbags (2) of the same partition assembly; The method for removing the abandoned pipeline includes the following steps: Manufacturing the aforementioned waste pipe removal device; The waste pipe removal device is pushed into the waste pipe (7) along the axial direction of the waste pipe (7); Inflate the trachea (3) until the airbag (2) comes into contact with the inner wall of the waste pipe (7); Grouting material (8) is injected into the grouting pipe (1). The grouting material (8) enters between the two air bladders (2) of each group of partition components through the grouting hole (11). After the grouting material (8) solidifies, it fixes the grouting pipe (1) and the waste pipe (7) together. Pull the grouting pipe (1) and remove the old pipe (7); Before manufacturing the waste pipe removal device, the damaged part inside the waste pipe (7) is located by the detection device. When manufacturing the waste pipe removal device, the distance between the two airbags (2) in the same group is limited according to the location of the damaged part. The distance between the two airbags (2) in the same group is greater than the width of the damaged part.

2. The method for removing abandoned pipes according to claim 1, characterized in that, The air tube (3) is fixedly inserted into the grouting pipe (1) along the axial direction. The air tube (3) includes a main pipe (31) and branch pipes (32). A plurality of branch pipes (32) are arranged one-to-one with the airbag (2). One end of the branch pipe (32) is connected to the main pipe (31), and the other end of the branch pipe (32) passes through the grouting pipe (1) and is connected to the airbag (2).

3. The method for removing abandoned pipes according to claim 1, characterized in that, It also includes pulley blocks, a plurality of which are fixed along the axial direction of the grouting pipe (1) on the outer wall of the grouting pipe (1), and the pulley blocks include two pulleys (4).

4. The method for removing abandoned pipes according to claim 3, characterized in that, The pulley assembly and the separator assembly are arranged alternately.

5. The method for removing abandoned pipes according to claim 3, characterized in that, The pulley assembly is fixed to the grouting pipe (1) by a clamp (5). The clamp (5) includes a first base (51) and a second base (52). Both ends of the first base (51) and the second base (52) are provided with connecting ears. The first base (51) and the second base (52) are connected by fasteners passing through the connecting ears.

6. The method for removing abandoned pipes according to claim 1, characterized in that, The airbag (2) is attached to the outer wall of the grouting pipe (1).

7. The method for removing abandoned pipes according to claim 1, characterized in that, The grouting pipe (1) enters the waste pipe (7) and becomes coaxial with the waste pipe (7).

8. The method for removing abandoned pipes according to claim 1, characterized in that, The grouting material (8) is cement mortar.

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