A leaking pipeline pressure plugging repair device

Abstract

The patent relates to the technical field of engineering, in particular to a leaking pipeline pressure plugging and repairing device, which comprises a main body structure and a plugging assembly; the main body structure comprises an upper shell and a lower shell, which are fastened to the pipeline through bolts; the plugging assembly comprises a threaded top rod, a connecting rod, a plugging plate and a sealing plate; the threaded top rod is screwed to push the connecting rod to move, so that the sealing plate is pressed to the leaking position of the outer wall of the pipeline; the plugging pressure is adjusted by adjusting the pre-tightening force of the threaded top rod; an annular area is formed between the main body structure and the pipeline, and the annular area is filled with grouting slurry. The patent does not need fire operation, has wide operation range, is convenient and efficient to install and operate, and can not only quickly and safely repair the pipeline, but also long-term maintain the leaking pipeline.

Description

Technical Field

[0001] This patent relates to the field of engineering technology, specifically a device for pressurized sealing and repair of leaking pipelines. Background Technology

[0002] Pipeline leaks due to corrosion and perforation of the pipe wall. Because the leak points are relatively concentrated, traditional pipe sealing methods such as welding repair or using cast clamps with sealing rubber strips are typically used for temporary sealing. The limitations of these methods are: 1) Welding repair requires hot work, so the applicable working environment is relatively narrow, especially unsuitable for repairing pipelines transporting flammable and explosive media such as crude oil, natural gas, and refined oil.

[0003] 2) Casting fixtures and other mechanical clamps are usually quite heavy and rely on the sealing ability of sealing rubber strips to ensure sealing pressure. Therefore, as the diameter of the pipe being repaired increases, the size and weight of the clamps will increase dramatically, leading to increased difficulty in hoisting operations, reduced construction efficiency, longer operation time, and higher operating costs.

[0004] 3) When using mechanical clamps to seal leaking pipelines, the flow rate of the medium overflowing from the leak increases dramatically with the increase of sealing pressure, and it sprays and splashes in all directions. This severely obstructs the vision of the workers and may even endanger their health and safety. Currently, the above-mentioned traditional pipeline sealing methods cannot collect and effectively remove the overflowing medium.

[0005] Furthermore, traditional pipe plugging methods can only temporarily resolve pipe leaks and cannot reinforce or repair pipes that have suffered corrosion and perforation. Currently, pipe plugging and pipe repair are relatively independent procedures, and the tooling and fixtures used are different. Therefore, additional pipe repair tools such as grouting fixtures are required for pipe repair. Summary of the Invention

[0006] To address the aforementioned limitations, this patent provides a live sealing and repair device for leaking pipelines, comprising a main structure and sealing components, characterized in that: The main structure includes an upper shell and a lower shell; the upper shell and the lower shell are fastened to the pipe with bolts. The sealing assembly includes a threaded push rod, a connecting rod, a sealing plate, and a sealing plate; The threaded push rod is connected to the main structure via a threaded pair; the connecting rod is unidirectionally embedded in the main structure; the end of the threaded push rod is opposite to the connecting rod; a sealing plate is installed below the connecting rod; the sealing plate is located between the sealing plate and the pipe wall; by tightening the threaded push rod, the connecting rod can be contacted and pushed to move radially relative to the main structure, thereby pressing the sealing plate against the leak on the outer wall of the pipe; the sealing pressure can be adjusted by adjusting the preload of the threaded push rod. An annular area is formed between the main structure and the pipeline; The main structure is equipped with grouting ports; grout is injected into the annular area through the grouting ports.

[0007] Preferably, the sealing plate is bonded and fixed to the inside of the sealing plate.

[0008] Preferably, sealing elements that contact the outer wall of the pipe are provided on both the left and right sides of the main structure.

[0009] Preferably, the grouting port includes a main grouting port; the grouting port is located at the lower part of the main structure; and the grout outlet is located at the upper part of the main structure.

[0010] More preferably, the grouting port also includes a backup grouting port; the main grouting port and the backup grouting port are respectively located on the left and right sides of the main structure and arranged back and forth along the pipeline axis.

[0011] As a preferred option, the filler grout can be either a high-strength grout or an epoxy resin material.

[0012] Preferably, the upper part of the connecting rod is provided with a limiting structure; the limiting structure includes an annular boss and a guide groove opened radially along the annular boss; The main structure has a stepped hole consisting of a ring platform through hole and a connecting rod through hole; a stop end face is provided between the ring platform through hole and the connecting rod through hole; a guide protrusion is provided on the surface of the ring platform through hole; The annular boss and the annular platform form a clearance fit through the hole; the guide protrusion and the guide groove form a clearance fit. The connecting rod moves axially through the stepped hole, but the annular boss of the connecting rod stops at the stop end face.

[0013] More preferably, the main structure includes an installation cylinder; the installation cylinder has an internal thread that mates with the threaded push rod, and a ring-shaped through hole; the main structure also has a connecting rod through hole.

[0014] Preferably, the upper part of the threaded push rod has a hexagonal structure; the middle part of the threaded push rod has an anti-loosening thread; the lower part of the threaded push rod is a reduced-diameter push post; and the upper part of the connecting rod has a blind hole that matches it.

[0015] As a preferred embodiment, the leaking pipeline pressurized sealing and repair device of this patent also includes a limiting pin; in the pre-assembly stage, the limiting pin is used to limit the position of the connecting rod, so that the sealing component is disengaged from the outer wall of the pipeline.

[0016] Compared with existing technologies, the advantages of this patent are: no hot work is required, the operating range is wide; the size is small, the installation and operation are convenient and efficient; it can prevent media spraying and splashing, and can eliminate the adverse effects of spilled media, so as to achieve the purpose of rapid and safe pipeline repair; it can provide long-term maintenance for leaking pipelines. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram (including the pipeline) of a leaking pipeline pressurized sealing and repair device according to this patent.

[0018] Figure 2 for Figure 1 The side view projection diagram.

[0019] Figure 3 for Figure 1 3D structural rendering of the lower and middle shell (with transparent material applied).

[0020] Figure 4 A 3D structural rendering of the connecting rod and the sealing plate.

[0021] Figure 5 This is a 3D structural rendering of the upper shell after it has been cut by a symmetrical mid-section.

[0022] Figure 6 for Figure 5 A magnified view of a section at point I.

[0023] Figure 7 This is a 3D partial assembly rendering of the threaded push rod, connecting rod, and upper housing (the upper housing is treated with a transparent material).

[0024] Figure 8 This is a three-dimensional partial structural rendering (including the pipe) of this patent after being cut by the perpendicular plane passing through the pipe axis.

[0025] Figure 9 This is a 3D structural rendering of the threaded push rod.

[0026] Figure 10 This is a 3D partial structural rendering of the patent after the limit pin is installed (the threaded top rod is not installed, and the upper shell is made of transparent material).

[0027] In the diagram: 1. Upper shell; 1-1. Ring platform through hole; 1-2. Anti-rotation guide protrusion; 1-3. Stop end face; 1-4. Connecting rod through hole; 101. Grout outlet; 2. Lower shell; 201. Main grouting port; 202. Spare grouting port; 3. Bolt; 4. Threaded top rod; 4-1. Hexagonal structure; 4-2. Anti-loosening thread; 4-3. Reduced diameter top column; 5. Sealing plate; 6. Sealing plate; 601. Connecting rod; 601-1. Ring boss; 601-2. Guide groove; 7. Seal; 8. Mounting cylinder; 9. Limiting pin. Detailed Implementation

[0028] The technical solutions of this patent embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this patent, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this patent without inventive effort are within the scope of protection of this patent. Specific Implementation Example 1

[0029] like Figures 1 to 3 As shown, this patent discloses a pressurized sealing and repair device for leaking pipelines, comprising a main structure and sealing components, characterized in that: The main structure includes an upper shell (1) and a lower shell (2); the upper shell (1) and the lower shell (2) are fastened to the outer periphery of the pipe (unnumbered) by bolts (3); The sealing assembly includes a threaded push rod (4), a connecting rod (601), and a sealing plate (6). The threaded top rod (4) is connected to the main structure via a threaded pair; the connecting rod (601) is movably embedded in the main structure along the radial direction of the main structure by means of a limiting structure; the end of the threaded top rod (4) is provided with the connecting rod (601); a sealing plate (6) for sealing the pipeline leak is provided below the connecting rod (601); by tightening the threaded top rod (4), the connecting rod (601) can be contacted and pushed to move radially relative to the main structure, thereby pressing the sealing plate (6) against the leak on the outer wall to achieve the purpose of quickly sealing the pipeline leak; by adjusting the preload of the threaded top rod (4), the sealing pressure of the sealing plate (6) can be adjusted; An annular area is formed between the main structure and the pipeline; The main structure is equipped with grouting ports; filling grout is injected into the annular area through the grouting ports; Preferably, in order to prevent the filling slurry from leaking out from the gap between the main structure and the pipe, a sealing element (7) that contacts the outer wall of the pipe is embedded on the left and right sides of the main structure; in this example, more specifically, it is a split sealing ring.

[0030] Preferably, for ease of grouting, the grouting port includes a main grouting port (201); the grouting port is located at the lower part of the main structure; and the grout outlet (101) is located at the upper part of the main structure. In this example, more specifically, the main grouting port (201) is located at the bottom of the lower shell (2); and the grout outlet (101) is located at the top of the upper shell (1).

[0031] More preferably, in order to ensure that the filling grout evenly fills the entire annular area and improve the grouting efficiency, the grouting port also includes a spare grouting port (202); the spare grouting port (202) can be used when the main grouting port (201) is blocked, or can be used together with the main grouting port (201) for grouting operations; the main grouting port (201) and the spare grouting port (202) are respectively located on the left and right sides of the main structure and are arranged back and forth along the pipeline axis.

[0032] Preferably, the filler grout can be a high-strength grout or an epoxy resin material.

[0033] Preferably, in order to improve the sealing effect, the sealing assembly also includes a sealing plate (5) for filling the gap; the sealing plate (5) is disposed between the sealing plate (6) and the pipe wall; the sealing plate (5) can be selected from sealing plates of different materials to adapt to the sealing of pipelines of different media.

[0034] More preferably, for ease of assembly, the sealing plate (5) is bonded and fixed to the inside of the sealing plate (6).

[0035] More preferably, the sealing plate (5) is made of rubber. Specific Implementation Example 2

[0036] As a preferred option, such as Figures 4 to 8 As shown, the limiting structure is provided on the upper part of the connecting rod (601); the limiting structure includes an annular boss (601-1) and a guide groove (601-2) radially opened along the annular boss (601-1). Accordingly, in the main structure, more specifically in this example, the upper shell (1) is provided with a stepped hole consisting of a ring-shaped through hole (1-1) and a connecting rod through hole (1-4); a stop end face (1-3) is provided between the ring-shaped through hole (1-1) and the connecting rod through hole (1-4); a guide protrusion (1-2) is provided on the surface of the ring-shaped through hole (1-1). The annular boss (601-1) and the annular platform through hole (1-1) form a clearance fit. At the same time, the guide protrusion (1-2) and the guide groove (601-2) form a clearance fit to prevent the sealing plate (6) from rotating relative to the main structure when the connecting rod (601) moves radially relative to the main structure, thus affecting the sealing effect.

[0037] The connecting rod (601) moves axially through the stepped hole, but the annular boss (601-1) of the connecting rod (601) is stopped on the stop end face (1-3) to prevent the connecting rod (601) from accidentally falling off the main structure during the pre-assembly stage described below. It is worth noting that when the leaking pipeline pressurized sealing and repair device is in the sealing working state, there is still a certain gap between the lower end face of the annular boss (601-1) and the stop end face (1-3). Specific Implementation Example 3

[0038] More preferably, such as Figure 5 , Figure 6 and Figure 8 As shown, in order to further improve the manufacturing process and reduce the size of the main structure, in this example, more specifically, on the upper shell (1), an mounting cylinder (8) is welded on the main structure; the mounting cylinder (8) is provided with an internal thread that matches the threaded top rod (4) and a ring-shaped through hole (1-1); correspondingly, a connecting rod through hole (1-4) is provided on the main structure. Specific Implementation Example 4

[0039] As a preferred option, such as Figure 4 and Figure 9 As shown, in order to improve the manufacturing process and assembly reliability, the upper part of the threaded push rod (4) is provided with a hexagonal structure (4-1) that matches the wrench; the middle part of the threaded push rod (4) is provided with an anti-loosening thread (4-2); the lower part of the threaded push rod (4) is a reduced diameter push post (4-3); and the upper part of the connecting rod (601) is provided with a blind hole (not numbered) that matches it. Specific Implementation Example 5

[0040] Considering that during the adjustment phase, if the connecting rod (601) moves downward along the radial direction of the main structure due to gravity, the sealing plate (6) will come into contact with the outer wall of the pipe. This will not only increase the resistance to movement but also damage the sealing plate (5). Therefore, it is more preferable that, Figure 10 As shown, the leaking pipeline pressurized sealing and repair device of this patent also includes a limiting pin (9); in the pre-assembly stage, the limiting pin (9) moves through the mounting cylinder (8) and locks the connecting rod (601) at a position away from the stop end face (1-3) so that the sealing component, specifically the sealing plate (5), is disengaged from the outer wall of the pipeline; more specifically, in this example, the lower end face of the annular boss (601-1) abuts against the limiting pin (9).

[0041] To facilitate understanding of the technical solution of this patent, the assembly and usage process is briefly described below: S1: Pre-assembly; First, hoist the upper shell (1) and lower shell (2) near the pipeline leak, then use bolts (3) to fasten the upper shell (1) and lower shell (2) into a whole so that the main structure can be installed on the pipeline; then, install the sealing components except for the threaded top rod (4) on the main structure; then, as Figure 10 As shown, after the connecting rod (601) is raised to a certain height, it is locked onto the main structure by the limiting pin (9); at this time, since the sealing component, specifically the sealing plate (5), does not contact the outer wall of the pipe, the main structure can move axially horizontally on the pipe. S2: Position Marking; To facilitate position adjustment, centering marks are made on the outer wall of the pipe according to the specific location of the leak; S3: Position adjustment; According to the centering mark, adjust the axial position of the main structure relative to the pipeline so that the pipeline leak is located directly below the sealing plate (5); S4: Sealing operation; pull out the limit pin (9), lower the connecting rod (601) so that the sealing plate (5) contacts the leak in the pipeline; install the threaded top rod (4); use a wrench to turn the threaded top rod (4) to press the sealing plate (5) and the sealing plate (6) against the leak; the degree of pressing depends on the sealing pressure, and different sealing pressures correspond to the preload required by the threaded top rod (4); S5: Sealing treatment of the annular area; on the left and right sides of the main structure, sealing elements (7) that contact the outer wall of the pipe are respectively embedded. S6: Grouting operation; injecting filling grout into the annular area using the grouting port; S7: Finishing operation; After the grouting operation is completed, close the grouting port and the grout outlet (101) and wait for the filling grout to solidify.

[0042] As a preferred option, considering that corrosive media or other media that may affect the filling or curing effect of the filling slurry may be transported in the pipeline, the annular area needs to be cleaned between S5 and S6. As a preferred method, the criterion for determining whether the grouting operation in S6 is completed is: the grout outlet (101) reserved in the upper shell (1) stably discharges grout for 30 seconds.

[0043] Based on the above specific embodiments, this patent has the following advantages: 1. Compared with traditional pipeline repair methods such as welding repair, this patent does not require hot work during implementation, thus it is applicable to a wider range of working environments, especially suitable for repairing pipelines transporting flammable and explosive media such as crude oil, natural gas, and refined oil. In addition, sealing plates (5) made of different materials can be selected to seal pipelines for different media.

[0044] 2. Compared to traditional pipe sealing methods such as "using conventional cast clamps with sealing rubber strips," this patent features a welded structure that utilizes threaded fastening to achieve pipe sealing. The cured filler slurry maintains the sealing effect. Therefore, under the same sealing pressure, this patent requires smaller clamps, smaller fastening threads, and is lighter, resulting in lower manufacturing costs and easier installation. Furthermore, after sealing, this patent allows for cleaning to remove residual media in the annular region, eliminating the adverse effects of spilled media, whereas traditional pipe sealing methods cannot remove spilled media.

[0045] 3. Currently, pipeline plugging and pipeline repair are two relatively independent work processes, and the tooling and fixtures used are different. This patent highly integrates the two processes of pipeline plugging and pipeline repair, making installation and operation more convenient, construction efficiency higher, and operation time shorter, thus achieving the goal of rapid emergency repair of leaking pipelines.

[0046] 4. When using traditional mechanical clamps to seal leaking pipelines, the flow rate of the medium overflowing from the leak increases dramatically with the increase of sealing pressure, and it sprays and splashes in all directions. This severely obstructs the vision of the workers and may even endanger their health and safety. This patented design, during the positioning and sealing process, uses a main structure to shield the splashed medium, acting as an "isolation shield," facilitating the collection and effective removal of the overflowing medium.

[0047] 5. Compared with the temporary maintenance method of ordinary pipelines, when the filling grout in this patent is made of high-strength grout and epoxy resin, it can carry out long-term maintenance of leaking pipelines. The reasons are as follows: 1) After the filling grout is cured in the annular area, it forms a permanent mechanical anchoring effect that is isolated from the external environment, thereby eliminating the problem of sealing failure caused by the loosening of the thread of the threaded top rod (4) and the failure of its strength under the disturbance of external environment such as high pipeline internal pressure fluctuation, pipeline vibration, ocean current, or electrochemical corrosion; 2) After the filling grout is cured in the annular area, it greatly improves the overall rigidity of the device of this patent, and plays a significant role in strengthening the strength of the leaking pipeline, especially the bending strength.

[0048] It will be apparent to those skilled in the art that this patent is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this patent. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this patent is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this patent. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A live-line sealing and repair device for leaking pipelines, comprising a main structure and sealing components, characterized in that: The main structure includes an upper shell (1) and a lower shell (2); the upper shell (1) and the lower shell (2) are fastened to the pipe by bolts (3); The sealing assembly includes a threaded push rod (4), a connecting rod (601), a sealing plate (6), and a sealing plate (5); The threaded push rod (4) is connected to the main structure via a threaded pair; the connecting rod (601) is unidirectionally embedded in the main structure; the end of the threaded push rod (4) is provided with the connecting rod (601); a sealing plate (6) is provided below the connecting rod (601); the sealing plate (5) is provided between the sealing plate (6) and the pipe wall; by tightening the threaded push rod (4), the connecting rod (601) can be contacted and pushed to move radially relative to the main structure, thereby pressing the sealing plate (5) against the leak on the outer wall of the pipe; the sealing pressure can be adjusted by adjusting the preload of the threaded push rod (4); An annular area is formed between the main structure and the pipeline; The main structure is equipped with grouting ports; grout is injected into the annular area through the grouting ports.

2. The leaking pipeline pressurized sealing and repair device according to claim 1, characterized in that: The sealing plate (5) is bonded and fixed to the inside of the sealing plate (6).

3. The leaking pipeline pressurized sealing and repair device according to claim 1, characterized in that: On the left and right sides of the main structure, sealing elements (7) that come into contact with the outer wall of the pipe are respectively provided.

4. The live sealing and repair device for leaking pipelines according to claim 1, characterized in that: The grouting port includes a main grouting port (201); the grouting port is located at the lower part of the main structure; and the grout outlet (101) is located at the upper part of the main structure.

5. The live sealing and repair device for leaking pipelines according to claim 4, characterized in that: The grouting port also includes a spare grouting port (202); the main grouting port (201) and the spare grouting port (202) are respectively located on the left and right sides of the main structure and arranged back and forth along the pipeline axis.

6. The live sealing and repair device for leaking pipelines according to claim 1, characterized in that: The filler grout can be either high-strength grout or epoxy resin material.

7. The live sealing and repair device for leaking pipelines according to claim 1, characterized in that: The upper part of the connecting rod (601) is provided with a limiting structure; the limiting structure includes an annular boss (601-1) and a guide groove (601-2) radially opened along the annular boss (601-1). In terms of the main structure, a stepped hole is provided, consisting of a ring platform through hole (1-1) and a connecting rod through hole (1-4); a stop end face (1-3) is provided between the ring platform through hole (1-1) and the connecting rod through hole (1-4); a guide protrusion (1-2) is provided on the surface of the ring platform through hole (1-1). The annular boss (601-1) and the annular through hole (1-1) form a clearance fit; the guide protrusion (1-2) and the guide groove (601-2) form a clearance fit; The connecting rod (601) moves axially through the stepped hole, but the annular boss (601-1) of the connecting rod (601) is stopped on the stop end face (1-3).

8. The live sealing and repair device for leaking pipelines according to claim 7, characterized in that: The main structure is provided with an installation cylinder (8); the installation cylinder (8) is provided with an internal thread that matches the threaded push rod (4), and a ring platform through hole (1-1); the main structure is provided with a connecting rod through hole (1-4).

9. The live sealing and repair device for leaking pipelines according to claim 1, characterized in that: The upper part of the threaded push rod (4) is provided with a hexagonal structure (4-1); the middle part of the threaded push rod (4) is provided with an anti-loosening thread (4-2); the lower part of the threaded push rod (4) is a reduced diameter push post (4-3); the upper part of the connecting rod (601) is provided with a blind hole that matches it.

10. The live sealing and repair device for leaking pipelines according to claim 1, characterized in that: It also includes a limiting pin (9); during the pre-assembly stage, the limiting pin (9) is used to limit the position of the connecting rod (601) so that the sealing component is disengaged from the outer wall of the pipe.

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