Online leaking stoppage method

Abstract

The invention discloses an online leaking stoppage method, which relates to the technical field of chemical engineering, and comprises the following steps: S1, sealing a leaking point on a pipeline by using a leaking stoppage sheet, and fixing the leaking stoppage sheet after the sealing is completed; s2, the periphery of the pipeline leakage point is cleaned; s3, epoxy resin is used for smearing the peripheral area of the leaking stoppage piece; s4, carbon fiber cloth is used for oppositely winding the peripheral area coated with the epoxy resin; s5, the outer layer of the area where the carbon fiber cloth strips are wound is coated with epoxy resin again; the epoxy resin is completely dried, and leaking stoppage is completed. The combination composed of the carbon fiber cloth and the epoxy resin can reinforce a thin-wall pipeline near an original leakage point, and the service life of the pipeline is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of chemical engineering, in particular to an online leak plugging method. Background Art

[0002] The chemical production area of ​​large ramming coke ovens is equipped with sulfuric acid ammonia washing, benzene washing, vacuum carbonate desulfurization, OMC wet desulfurization and dry desulfurization process equipment. With the aging of the equipment, leaks often appear in the process pipelines. The original online plugging method can only be sealed by mechanical structure coating. However, this type of sealing method is difficult to plug online in areas such as reducers, elbows, tees and flange welds. Before this, the only way to centrally deal with the leaks is to reverse the machine or stop production, which seriously affects the stable operation of production. In order to solve this technical problem, an online plugging method is proposed. Summary of the invention

[0003] The purpose of the present invention is to provide an online plugging method, which can handle leaks in complex pipeline environments that are difficult to handle with traditional mechanical plugging methods, and can also reinforce thin-walled pipes near the leaks due to rust or corrosion. This technology does not require prefabrication, and solves the problem of device shutdown caused by the inability to handle leaks in complex pipelines online, which is of great significance to the safe and stable production of chemical plants.

[0004] To achieve the above object, the present invention provides the following technical solutions: An online leak plugging method, the online leak plugging method comprising: S1. Use the plugging piece to seal the leaking point on the pipeline, and fix the plugging piece after sealing; S2. Clean the area around the pipeline leak; S3. Use epoxy resin to coat the surrounding area of ​​the plugging piece; S4, using carbon fiber cloth to wrap around the surrounding area where epoxy resin is applied; S5. Apply epoxy resin again to the outer layer of the area where the carbon fiber cloth strips are wrapped; when the epoxy resin is completely dry, the leak is plugged.

[0005] As a further solution of the present invention: S1, using a leak-blocking sheet to seal the leaking point on the pipeline, and fixing the leak-blocking sheet after the sealing is completed, including: If the diameter of the leak on the pipeline is less than 0.3cm and greater than 0.1cm, use electrical tape to curl and wrap it into a cone suitable for the leak. Wrap two layers of raw tape around the cone. The assembly can be directly plugged at the leak location. Use a small iron (aluminum or stainless steel) sheet to stick to the outside of the assembly to complete the plugging stage. If the diameter of the leak on the pipeline is less than 0.1cm, use raw tape to wrap it into a small cone, and use a small iron (aluminum or stainless steel) sheet to stick it on the outside to complete the plugging stage; If the pipeline is an offline pipeline (meaning it has been emptied or is not pressurized), S1 treatment is not performed and subsequent S2-S5 are performed directly.

[0006] As a further solution of the present invention: the plugging sheet can be an iron sheet, an aluminum sheet, a stainless steel sheet or a tape cone.

[0007] As a further solution of the present invention: the edges of the iron sheet, the aluminum sheet and the stainless steel sheet are wrapped with adhesive tape.

[0008] As a further solution of the present invention: the leak-proof sheet is fixed on the pipeline by a fixing strip.

[0009] As a further solution of the present invention: both ends of the plugging piece are provided with fixing strips which are wound around the pipe to fix it.

[0010] As a further solution of the present invention: the fixing strip can be an iron wire or a steel strip.

[0011] As a further solution of the present invention: cleaning the area around the pipeline leaking point includes: Clean the rust, moisture and stains around the leaking point of the pipe.

[0012] As a further solution of the present invention: using carbon fiber cloth to be oppositely wound around the peripheral area coated with epoxy resin, comprising: Use a carbon fiber cloth with a width of 2-3 cm to wrap around the surrounding area where the epoxy resin is applied.

[0013] As a further solution of the present invention: using carbon fiber cloth to be oppositely wound around the peripheral area coated with epoxy resin, comprising: Use a carbon fiber strip with a width of 2-3 cm to wrap it around the surrounding area where the epoxy resin is applied at an angle of 10°.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the epoxy resin, polytetrafluoroethylene and carbon fiber used in the present invention have good acid, alkali and oil resistance; the materials used in the present invention are suitable for almost all pipeline environments where the pressure in the pipeline is less than or equal to 0.5 MPa when the temperature of the conveying medium is lower than 150°C and the temperature is higher than -10°C; the carbon fiber is a flexible material and can adapt to pipelines of various shapes and sizes; the combination of the carbon fiber cloth and the epoxy resin in the present invention can reinforce the thin-walled pipeline near the original leakage point and increase the service life of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of step S1 in an online leak plugging method according to an embodiment of the present invention.

[0016] Figure 2This is a completion status diagram of an online leak plugging method according to an embodiment of the present invention.

[0017] In the figure: 1-leak point, 2-tape, 3-leakage plugging piece, 4-fixing strip, 5-pipe, 6-carbon fiber cloth strip. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1 and Figure 2 As shown, the present invention provides an online plugging method, which includes the following steps S1-S5.

[0020] S1. Use the leak-blocking piece 3 to seal the leak point 1 on the pipeline 5, and fix the leak-blocking piece 3 after the sealing is completed.

[0021] In the embodiment of the present invention, S1, using the plugging sheet 3 to seal the leaking point 1 on the pipeline 5, and fixing the plugging sheet 3 after the sealing is completed, including: If the diameter of the leak point 1 on the pipe 5 is less than 0.3cm and greater than 0.1cm, use electrical tape to curl and wrap it into a cone suitable for the leak point 1, and wrap two layers of raw tape around the cone. The assembly can be directly plugged at the leak point, and a small iron (aluminum or stainless steel) sheet can be used to stick to the outside of the assembly to complete the plugging stage; If the diameter of the leak point 1 on the pipeline 5 is less than 0.1 cm, use raw tape to curl it into a small cone, and use a small iron (aluminum or stainless steel) sheet to stick it on the outside to complete the plugging stage.

[0022] If pipeline 5 is an offline pipeline (meaning it is emptied or has no pressure), S1 processing is not performed and subsequent S2-S5 are directly performed.

[0023] In the embodiment of the present invention, the plugging sheet 3 may be an iron sheet, an aluminum sheet, a stainless steel sheet or a tape cone.

[0024] In the embodiment of the present invention, the edges of the iron sheet, the aluminum sheet and the stainless steel sheet are wrapped with adhesive tape 2. The adhesive tape 2 may be a polytetrafluoroethylene tape.

[0025] In the embodiment of the present invention, the plugging piece 3 is fixed on the pipeline 5 via a fixing strip.

[0026] Both ends of the plugging sheet 3 are provided with fixing strips wound around the pipe 5 to fix it. The fixing strips can be iron wires or steel strips.

[0027] S2. Clean the area around the pipeline leak.

[0028] In an embodiment of the present invention, cleaning around the pipeline leak point includes: Clean the rust, moisture and stains around the leaking point of the pipe.

[0029] S3, coating the peripheral area of ​​the plugging piece 3 with epoxy resin.

[0030] S4. Use carbon fiber cloth to wrap around the surrounding area where epoxy resin is applied.

[0031] In the embodiment of the present invention, S4, using carbon fiber cloth to wrap around the peripheral area coated with epoxy resin in opposite directions, includes: Use a carbon fiber cloth with a width of 2-3 cm to wrap around the surrounding area where the epoxy resin is applied.

[0032] In the embodiment of the present invention, S4, using carbon fiber cloth strips 6 to wrap around the peripheral area coated with epoxy resin, includes: A carbon fiber strip 6 with a width of 2-3 cm is used to be wound around the peripheral area coated with epoxy resin at an angle of 10°.

[0033] S5. Apply epoxy resin again to the outer layer of the area where the carbon fiber cloth strip 6 is wrapped; the epoxy resin is completely dried, and the leak plugging is completed.

[0034] Example 1 An online plugging method, the method comprising the following steps S1-S5: S1. If the diameter of the leak on the pipe 5 is less than 0.3cm and greater than 0.1cm, use electrical tape to curl and wrap it into a cone suitable for the leak 1. Wrap two layers of raw tape around the cone. The assembly can be directly plugged at the leak location. Use a small iron (aluminum or stainless steel) sheet to stick to the outside of the assembly to complete the plugging stage. S2. Clean the rust, moisture and stains around the pipeline leakage point 1.

[0035] S3, coating the peripheral area of ​​the plugging piece 3 with epoxy resin.

[0036] S4. Use a carbon fiber strip 6 with a width of 2 cm to wrap it around the peripheral area coated with epoxy resin at an angle of 10°.

[0037] S5. Apply epoxy resin again to the outer layer of the area where the carbon fiber cloth strip 6 is wrapped; the epoxy resin is completely dried, and the leak plugging is completed.

[0038] Example 2 An online plugging method, the method comprising the following steps S1-S5: S1. If the diameter of the leak on the pipe 5 is less than 0.3cm and greater than 0.1cm, use electrical tape to curl and wrap it into a cone suitable for the leak 1. Wrap two layers of raw tape around the cone. The assembly can be directly plugged at the leak location. Use a small iron (aluminum or stainless steel) sheet to stick to the outside of the assembly to complete the plugging stage. S2. Clean the rust, moisture and stains around the pipeline leakage point 1.

[0039] S3, coating the peripheral area of ​​the plugging piece 3 with epoxy resin.

[0040] S4. Use a carbon fiber strip 6 with a width of 3 cm to wrap it around the peripheral area coated with epoxy resin at an angle of 10°.

[0041] S5. Apply epoxy resin again to the outer layer of the area where the carbon fiber cloth strip 6 is wrapped; the epoxy resin is completely dried, and the leak plugging is completed.

[0042] Example 3 An online leak plugging method comprises the following steps: S1. For leak point 1 with a diameter less than 0.1cm, use raw tape to curl and wrap it into a small cone, and use a small iron (aluminum or stainless steel) sheet to stick it on the outside to complete the plugging stage.

[0043] S2. Clean the rust, moisture and stains around the leak point 1.

[0044] S3, coating the peripheral area of ​​the plugging piece 3 with epoxy resin.

[0045] S4. Use a carbon fiber strip 6 with a width of 2.2 cm to wrap it around the peripheral area coated with epoxy resin at an angle of 10°.

[0046] S5. Apply epoxy resin again to the outer layer of the area where the carbon fiber cloth strip 6 is wrapped; the epoxy resin is completely dried, and the leak plugging is completed.

[0047] Example 4 An online leak plugging method comprises the following steps: S1. For leak point 1 with a diameter less than 0.1cm, use raw tape to curl and wrap it into a small cone, and use a small iron (aluminum or stainless steel) sheet to stick it on the outside to complete the plugging stage.

[0048] S2. Clean the rust, moisture and stains around the leak point 1.

[0049] S3, coating the peripheral area of ​​the plugging piece 3 with epoxy resin.

[0050] S4. Use a carbon fiber strip 6 with a width of 2.8 cm to wrap it around the peripheral area coated with epoxy resin at an angle of 10°.

[0051] S5. Apply epoxy resin again to the outer layer of the area where the carbon fiber cloth strip 6 is wrapped; the epoxy resin is completely dried, and the leak plugging is completed.

[0052] Example 5 An online leak plugging method comprises the following steps: S1. Clean rust, moisture and stains around the leak point 1 on the offline pipeline 5.

[0053] S2. Use epoxy resin to coat the surrounding area of ​​the plugging piece 3.

[0054] S3. Use a carbon fiber strip 6 with a width of 2.5 cm to wrap it around the peripheral area coated with epoxy resin at an angle of 10°.

[0055] S4, applying epoxy resin again to the outer layer of the area where the carbon fiber cloth strip 6 is wrapped; the epoxy resin is completely dried, and the leak plugging is completed.

[0056] Example 6 An online leak plugging method comprises the following steps: S1. Use the plugging sheet 3 to seal the leaking point 1 on the pipe 5. After the sealing is completed, fix the iron sheet. The diameter of the leaking point 1 is greater than 0.3 cm.

[0057] The edge of the iron sheet is wrapped with polytetrafluoroethylene tape.

[0058] S2. Clean the area around the pipeline leak.

[0059] In an embodiment of the present invention, cleaning around the pipeline leak point includes: Clean the rust, moisture and stains around the leaking point of the pipe.

[0060] S3, coating the peripheral area of ​​the plugging piece 3 with epoxy resin.

[0061] S4. Use a carbon fiber strip 6 with a width of 2.5 cm to wrap it around the peripheral area coated with epoxy resin at an angle of 10°.

[0062] S5. Apply epoxy resin again to the outer layer of the area where the carbon fiber cloth strip 6 is wrapped; the epoxy resin is completely dried, and the leak plugging is completed.

[0063] Example 7 An online leak plugging method comprises the following steps: S1. Use the plugging sheet 3 to seal the leaking point 1 on the pipe 5. After the sealing is completed, fix the aluminum sheet. The diameter of the leaking point 1 is greater than 0.3 cm.

[0064] The edges of the aluminum sheet were wrapped with polytetrafluoroethylene tape.

[0065] S2. Clean the area around the pipeline leak.

[0066] In an embodiment of the present invention, cleaning around the pipeline leak point includes: Clean the rust, moisture and stains around the leaking point of the pipe.

[0067] S3, coating the peripheral area of ​​the plugging piece 3 with epoxy resin.

[0068] S4. Use a carbon fiber strip 6 with a width of 3 cm to wrap it around the peripheral area coated with epoxy resin at an angle of 10°.

[0069] S5. Apply epoxy resin again to the outer layer of the area where the carbon fiber cloth strip 6 is wrapped; the epoxy resin is completely dried, and the leak plugging is completed.

[0070] Example 8 An online leak plugging method comprises the following steps: S1. Use the plugging sheet 3 to seal the leaking point 1 on the pipeline 5. After the sealing is completed, fix the stainless steel sheet. The diameter of the leaking point 1 is greater than 0.3 cm.

[0071] The edge of the stainless steel sheet is wrapped with polytetrafluoroethylene tape.

[0072] S2. Clean the area around the pipeline leak.

[0073] In an embodiment of the present invention, cleaning around the pipeline leak point includes: Clean the rust, moisture and stains around the leaking point of the pipe.

[0074] S3, coating the peripheral area of ​​the plugging piece 3 with epoxy resin.

[0075] S4. Use a carbon fiber strip 6 with a width of 2 cm to wrap it around the peripheral area coated with epoxy resin at an angle of 10°.

[0076] S5. Apply epoxy resin again to the outer layer of the area where the carbon fiber cloth strip 6 is wrapped; the epoxy resin is completely dried, and the leak plugging is completed.

[0077] The present invention firstly adopts a leak-proof sheet with a polytetrafluoroethylene tape attached to the edge, and cooperates with iron wire or steel belt to achieve preliminary leak-proofing of the leak point, and then uses carbon fiber cloth and epoxy resin to fix, seal and reinforce the leak point and the surrounding area, and finally achieves the purpose of online leak-proofing of the pipeline without ignition.

[0078] The epoxy resin, polytetrafluoroethylene and carbon fiber used in the present invention have good acid, alkali and oil resistance; the materials used in the present invention are suitable for almost all pipeline environments where the pressure in the pipeline is less than or equal to 0.5MPa when the temperature of the conveying medium is lower than 150°C and the temperature is higher than -10°C; carbon fiber is a flexible material and can adapt to pipelines of various shapes and sizes; the materials needed in the present invention, except for carbon fiber cloth and epoxy resin, do not need to be purchased additionally at the production site; the combination of carbon fiber cloth and epoxy resin can reinforce the thin-walled pipeline near the original leakage point, thereby increasing the service life of the pipeline.

[0079] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An online plugging method, characterized in that: The online plugging method includes: S1. Use the plugging piece to seal the leaking point on the pipeline, and fix the plugging piece after sealing; S2. Clean the area around the pipeline leak; S3. Use epoxy resin to coat the surrounding area of ​​the plugging piece; S4, using carbon fiber cloth to wrap around the surrounding area where epoxy resin is applied; S5. Apply epoxy resin again to the outer layer of the area where the carbon fiber cloth strips are wrapped; when the epoxy resin is completely dry, the leak is plugged.

2. The online plugging method according to claim 1, characterized in that: S1. Use the plugging piece to seal the leaking point on the pipeline. After the sealing is completed, fix the plugging piece, including: If the diameter of the leak on the pipeline is less than 0.3cm and greater than 0.1cm, use electrical tape to curl and wrap it into a cone suitable for the leak. Wrap two layers of raw tape around the cone. The assembly can be directly plugged at the leak location. Use a small iron (aluminum or stainless steel) sheet to stick to the outside of the assembly to complete the plugging stage. If the diameter of the leak on the pipeline is less than 0.1cm, use raw tape to wrap it into a small cone, and use a small iron (aluminum or stainless steel) sheet to stick it on the outside to complete the plugging stage; If the pipeline is an offline pipeline (meaning it has been emptied or is not pressurized), S1 treatment is not performed and subsequent S2-S5 are performed directly.

3. The online plugging method according to claim 1, characterized in that: The plugging piece can be an iron sheet, an aluminum sheet, a stainless steel sheet or a tape cone.

4. The online plugging method according to claim 3, characterized in that: The edges of the iron sheet, the aluminum sheet and the stainless steel sheet are wrapped with adhesive tape.

5. The online leak plugging method according to claim 3, characterized in that: The leak-blocking piece is fixed on the pipeline via a fixing strip.

6. The online leak plugging method according to claim 5, characterized in that: Both ends of the plugging piece are provided with fixing strips which are wound around the pipeline to fix it.

7. The online plugging method according to claim 6, characterized in that: The fixing strip is an iron wire or a steel strip.

8. The online plugging method according to claim 1, characterized in that: Clean the area around the pipeline leak, including: Clean the rust, moisture and stains around the leaking point of the pipe.

9. The online leak plugging method according to claim 1, characterized in that: Use carbon fiber cloth to wrap around the area where epoxy resin is applied, including: Use a carbon fiber cloth with a width of 2-3 cm to wrap around the surrounding area where the epoxy resin is applied.

10. The online leak plugging method according to claim 9, characterized in that: Use carbon fiber cloth to wrap around the area where epoxy resin is applied, including: Use a carbon fiber strip with a width of 2-3 cm to wrap it around the surrounding area where the epoxy resin is applied at an angle of 10°.

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