Rapid maintenance structure for sewage discharge pipeline in old residential building and construction method of rapid maintenance structure

Abstract

The invention discloses a rapid maintenance structure of a sewage discharge pipeline in an old residential building and a construction method thereof, according to the problems and characteristics of the indoor sewage discharge pipeline of the old residential building, an old cast iron pipe is not completely dismantled, the cast iron sewage discharge pipe within the range of 100 mm above and below a floor slab is not replaced, and only interlayer pipelines are replaced. In this way, the cast iron pipe in the floor does not need to be removed by digging the floor, and adverse effects on the structure are avoided; as the floor slab does not need to be excavated, subsequent repairing is not needed, the construction period is shortened, and meanwhile the leakage risk is reduced; pipelines except the reserved cast iron pipe are replaced by plastic pipes, the plastic pipes are connected with the original cast iron pipe through the first inserting part and the second inserting part, and three waterproof treatments are performed at the joint, so that a very strong sealing effect is achieved; the floor tiles in a resident room cannot be damaged, the procedure of repairing the floor tiles in the later period is avoided, the efficiency is improved, the cost is saved, and very high economic benefits are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of maintenance of sewage pipelines in old residential buildings, and in particular to a quick maintenance structure and a construction method of sewage pipelines in old residential buildings. Background Art

[0002] Old houses usually refer to houses with a long history, outdated facilities and poor living environment. These houses often have safety hazards, unreasonable functional layout, poor energy-saving and environmental protection performance, etc., which seriously affect the living experience and quality of life of residents. Especially for the houses in the staff family quarters built in the 1980s and 1990s, most of their indoor sewage pipes are cast iron pipes. As time goes by, most of the sewage pipes are seriously corroded and often blocked. During the peak water use period, sewage will occasionally come up. In order to improve the living environment of residents, the implementation of sewage pipe renovation projects in residential buildings has become an urgent need to improve people's livelihood.

[0003] However, there is still a certain degree of difficulty in the renovation of indoor sewage pipes in old residential buildings with a relatively large age. The residential buildings have 3, 4, 5, and 6 floors, and there are various apartment types such as one elevator with two households, one elevator with three households, etc. During on-site construction, the cast iron pipes that need to be replaced are generally removed and replaced with new pipes. In order to replace the entire sewer pipe, the floor slab needs to be chiseled open to remove the cast iron pipes in the floor slab.

[0004] Although the above processing method can complete the work of replacing the pipeline, it still has the following disadvantages: 1) Considering that the building is 30-40 years old and the floor is a prefabricated structure, cutting open the floor may cause problems in terms of structural load-bearing and safety; 2) After installing the new pipe, the chiseled floor slab needs to be repaired, which requires a long construction period and is prone to leakage risks; 3) Chiseling open the floor slab also requires the removal of some floor tiles. The floor tile style of the residents' homes is outdated and can no longer be purchased on the market, which not only causes trouble but also increases the cost of subsequent repairs. Summary of the invention

[0005] The present invention provides a quick repair structure for sewage pipelines in old residential buildings and a construction method thereof, so as to solve the technical problems that when replacing sewage pipes in old residential buildings, floor slabs need to be chiseled open, which easily leads to safety problems of floor slab structure, leakage risks, long construction period and high cost of later repairs.

[0006] To achieve the above object, the present invention adopts the following technical solution: The present invention provides a quick maintenance structure for sewage pipelines in old residential buildings, comprising a floor, a first pipeline, a first connection node, and a second connection node; the first pipeline passes through the floor, the upper end of the first pipeline is provided with the first connection node, and the lower end of the first pipeline is provided with the second connection node; the first connection node comprises a second pipeline and a first plug-in portion; the lower end of the second pipeline is provided with the first plug-in portion, and the first plug-in portion is integrally formed with the second pipeline; the first plug-in portion is a variable diameter hollow pipe, comprising a first variable diameter section and a first plug-in portion, the diameter of the first variable diameter section is gradually reduced from top to bottom, the first plug-in portion is provided at the lower end of the first variable diameter section, and is plug-in-arranged with the first pipeline; The second connection node includes a second plug-in portion and a third pipeline; the second plug-in portion is a variable diameter hollow pipe, including a connecting section, a second variable diameter section and a second plug-in section; the connecting section is arranged at the lower end of the first pipeline, the second variable diameter section is arranged at the lower end of the connecting section, the diameter of the second variable diameter section is gradually reduced from top to bottom, the second plug-in section is arranged at the lower end of the second variable diameter section, and is plug-in-arranged with the third pipeline; It also includes a plugging material, which is arranged on the outer side surface of the second pipe, the joint between the first connection node and the first pipe, the outer side surface of the first pipe, and the joint between the second connection node and the first pipe; the plugging material includes a first plugging material, a second plugging material and a third plugging material; the first plugging material is arranged in multiple places, respectively arranged on the outer side surface of the lower part of the second pipe, the outer side surface of the lower end of the first plug-in section, the outer side surface of the lower part of the first pipe and the outer side surface of the lower end of the second plug-in section; wherein the first plugging material located on the outer side surface of the lower end of the first plug-in section is tightly pressed against the inner side surface of the first pipe, and the first plugging material located on the outer side surface of the lower end of the second plug-in section is tightly pressed against the inner side surface of the third pipe; The second plugging material is arranged on the upper end surface of the first plugging material; wherein the second plugging material located on the outer side surface of the lower end of the first plugging section is pressed against the inner side surface of the first pipe, and the second plugging material located on the outer side surface of the lower end of the second plugging section is pressed against the inner side surface of the third pipe; The third plugging material is arranged on the upper end surface of the second plugging material; wherein, the third plugging material located on the outer side surface of the first diameter-reducing section and the outer side surface of the second diameter-reducing section, the outer surfaces of the above two third plugging materials are flush with the outer surface of the first pipe.

[0007] Preferably, it also includes an inspection port; when the third pipeline is located on the ground floor of the building, an inspection port is set on the outer side surface of the third pipeline located at the lower part of the second connection node; when the second pipeline is located on the top floor of the building, an inspection port is set on the outer side surface of the second pipeline located at the upper part of the first connection node.

[0008] Preferably, it also includes a vertical fixing card, which is arranged on the outer side of the second pipe and the third pipe and is used to fix the pipe to the wall.

[0009] Preferably, the first pipeline is a cast iron pipe, and the second pipeline, the third pipeline, the first plug-in part and the second plug-in part are all plastic pipes.

[0010] Preferably, the inner diameter of the connecting section of the second plug-in portion is larger than the outer diameter of the first pipe, and the connecting section is sleeve-connected with the first pipe.

[0011] Preferably, the length of the first pipe above the floor slab and the length of the first pipe below the floor slab are both not less than 10 cm.

[0012] Preferably, the first plugging material is oily hemp silk, the second plugging material is watertight, and the third plugging material is silicone sealant.

[0013] The present invention also provides a construction method for the rapid maintenance structure of the sewage pipeline in the residential building, comprising the following steps: Step 1: Preparation before construction: Before the construction starts, lay plastic sheets on the walkways from the door to the bathroom and kitchen, lay plywood on the floor of the kitchen and bathroom construction areas, and take measures to protect the finished products, that is, cover or temporarily remove the walls, tiles, ceilings and sanitary kitchen facilities; Step 2: Removal of old pipes: Workers use handheld cutting machines to cut and remove the original cast iron pipes that need to be replaced in sections, leaving the original cast iron pipes above and below the floor slabs with a length of no less than 10 cm for connection with new pipes and leaving space for construction operations. After the original cast iron pipes are removed, they are manually transported out of the house and transported to the designated collection point outside the building, and cleared away after the construction is completed; Step 3: Surface treatment of old pipes: manually polish and remove rust from the original cast iron pipes, then apply a layer of anti-rust paint, and then apply a layer of blending paint after the anti-rust paint is dry; Step 4: Pipeline installation: In the outdoor work area, prefabricate new pipes according to the size and shape of indoor sewer pipes, and install them indoors after the new pipes are made; Step 5, waterproofing: waterproofing the joint between the first pipe and the first connection node, and waterproofing the joint between the first pipe and the second connection node; Step 6: Pipeline fixing: Install two sets of lifting rings to connect and fix the pipe to the floor slab, and use two sets of vertical fixing clips to connect and fix the pipe to the wall; Step seven, pipeline restoration: After the pipeline replacement is completed and the sealing material is solidified, restore the sanitary ware and kitchen utensils that were removed or covered before construction, strengthen civilized construction management, reduce dust and noise, and clean up waste in a timely manner.

[0014] Preferably, in step 4, prefabrication of the new pipeline includes integrally molding the second pipeline and the first plug-in portion, and separately molding the third pipeline and the second plug-in portion.

[0015] Preferably, in step five, the waterproof treatment method at the first connection node is as follows: wrap a circle of oily hemp silk around the outer side surface of the first plug-in section, and after the first plug-in section and the first pipe are plugged in, apply water-tight and silicone sealant at the joint between the two, and then wrap oily hemp silk around the outer side surface of the joint between the second pipe and the first pipe, and apply water-tight and silicone sealant; the waterproof treatment method of the second connection node is the same as that of the first connection node.

[0016] The beneficial effects of the present invention are embodied in: 1) The present invention provides a rapid maintenance structure and construction method for sewage pipelines in old residential buildings. According to the problems and characteristics of indoor sewage pipelines in old residential buildings, the old cast iron pipes are not completely removed, and the cast iron sewage pipes within 100 mm above and below the floor are not replaced. Only the pipelines between the layers are replaced. In this way, there is no need to excavate the floor to remove the cast iron pipes in the floor, which will not have a bad effect on the structure. In addition, the cast iron pipes retained in the floor are less exposed to the air, so the aging degree is low and the use requirements can be met. 2) The present invention provides a quick repair structure and construction method for sewage pipelines in old residential buildings. Since there is no need to excavate the floor slab, there is no need for subsequent repairs, which shortens the construction period and reduces the risk of leakage. Pipelines other than the retained cast iron pipes are replaced with plastic pipes, and the original cast iron pipes are connected through the first plug-in part and the second plug-in part. Three waterproof treatments are performed at the joints, which has a strong sealing effect. 3) The present invention provides a rapid repair structure and construction method for sewage pipelines in old residential buildings. Since there is no need to chisel open the floor slab, it will not damage the floor tiles in the residents' rooms, nor will it affect the indoor kitchen utensils, bathroom layout, etc., avoiding the need to repair floor tiles in the later stage, improving efficiency and saving costs, and has strong economic benefits.

[0017] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention; the main purpose and other advantages of the present invention may be realized and obtained through the solutions particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the rapid maintenance structure of the sewage pipeline of the present invention.

[0019] Figure numbers: 1-floor, 2-first pipeline, 3-first connecting node, 31-second pipeline, 32-first plug-in part, 321-first reducing section, 322-first plug-in section, 4-second connecting node, 41-second plug-in part, 411-connecting section, 412-second reducing section, 413-second plug-in section, 42-third pipeline, 51-first sealing material, 52-second sealing material, 53-third sealing material, 6-inspection port, 7-vertical fixing card. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is described in detail below through examples. The following examples are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, but cannot be interpreted as limiting the technical solution of the present invention.

[0021] This embodiment takes a renovation project of an old residential area as an example. For the renovation of indoor sewage pipes in the oilfield staff family area built in the 1980s and 1990s, there are still certain difficulties in construction. The residential buildings in the community have 3, 4, 5, and 6 floors, with various types of apartments such as one elevator for two households and one elevator for three households. The floor tiles of the residents' homes cannot be purchased on the market. According to this situation, the cast iron sewage pipe within 100mm above and below the floor is not replaced, and only the pipelines between the floors are replaced. This solves the long construction period of the traditional construction plan, avoids the risks of leakage and structural safety, and meets the functional requirements.

[0022] Reference Figure 1 , the present embodiment provides a rapid maintenance structure for sewage pipelines in old residential buildings, including a floor 1, a first pipe 2, a first connection node 3, and a second connection node 4; the first pipe 2 passes through the floor 1, and the length of the first pipe 2 above the floor 1 and the length below the floor 1 are not less than 10 cm, the first connection node 3 is arranged at the upper end of the first pipe 2, and the second connection node 4 is arranged at the lower end of the first pipe 2; the first connection node 3 includes a second pipe 31 and a first plug-in portion 32; the first plug-in portion 32 is arranged at the lower end of the second pipe 31, and the first plug-in portion 32 is integrally formed with the second pipe 31; the first plug-in portion 32 is a variable diameter hollow pipe, including a first variable diameter section 321 and a first plug-in section 322, the diameter of the first variable diameter section 321 is gradually reduced from top to bottom, the first plug-in section 322 is arranged at the lower end of the first variable diameter section 321, and is plugged with the first pipe 2; The second connection node 4 includes a second plug-in portion 41 and a third pipe 42; the second plug-in portion 41 is a hollow pipe with a reduced diameter, including a connecting section 411, a second reducing section 412 and a second plug-in section 413; the connecting section 411 is arranged at the lower end of the first pipe 2, and the inner diameter of the connecting section 411 is greater than the outer diameter of the first pipe 2, and is sleeved with the first pipe 2, the second reducing section 412 is arranged at the lower end of the connecting section 411, and the diameter of the second reducing section 412 is gradually reduced from top to bottom, and the second plug-in section 413 is arranged at the lower end of the second reducing section 412, and is plugged with the third pipe 42; It also includes a vertical fixing card 7, which is arranged on the outer side of the second pipe 31 and the third pipe 42 and is used to fix the pipes to the wall; It also includes a plugging material 5, which is arranged on the outer side of the second pipe 31, the joint between the first connection node 3 and the first pipe 2, the outer side of the first pipe 2, and the joint between the second connection node 4 and the first pipe 2; the plugging material 5 includes a first plugging material 51, a second plugging material 52 and a third plugging material 53, wherein the first plugging material 51 is made of oil hemp silk, the second plugging material 52 is made of water-tight, and the third plugging material 53 is made of silicone sealant; the first plugging material 51 is arranged in multiple places, respectively arranged on the outer side of the lower part of the second pipe 31, the outer side of the lower end of the first plug-in section 322, the outer side of the lower part of the first pipe 2 and the outer side of the lower end of the second plug-in section 413; wherein the first plugging material 51 located on the outer side of the lower end of the first plug-in section 322 is tightly pressed against the inner side of the first pipe 2, and the first plugging material 51 located on the outer side of the lower end of the second plug-in section 413 is tightly pressed against the inner side of the third pipe 42; The second plugging material 52 is arranged on the upper end surface of the first plugging material 51; wherein the second plugging material 52 located on the outer side surface of the lower end of the first plugging section 322 is pressed against the inner side surface of the first pipe 2, and the second plugging material 52 located on the outer side surface of the lower end of the second plugging section 413 is pressed against the inner side surface of the third pipe 42; The third plugging material 53 is arranged on the upper end surface of the second plugging material 52; wherein, the third plugging material 53 located on the outer side surface of the first reducing section 321 and the outer side surface of the second reducing section 412, the outer surfaces of the above two third plugging materials 53 are flush with the outer surface of the first pipe 2.

[0023] Furthermore, the rapid maintenance structure of the sewage pipeline in the above-mentioned old residential building also includes an inspection port 6. When the third pipe 42 is located on the ground floor of the building, the inspection port 6 is set on the outer side surface of the third pipe 42 located at the lower part of the second connection node 4; when the second pipe 31 is located on the top floor of the building, the inspection port 6 is set on the outer side surface of the second pipe 31 located at the upper part of the first connection node 3.

[0024] Furthermore, the first pipe 2 is a cast iron pipe, that is, the original cast iron pipe / old pipe, the second pipe 31, the third pipe 42, the first plug-in part 32 and the second plug-in part 41 are all plastic pipes, that is, new pipes. The new pipes can adopt PVC-U pipes. Compared with the old pipes, the new pipes are not only less prone to rust, but also have a thicker diameter; some of the replaced cast iron pipes have been corroded, and some of the inner diameters of the pipes have been occupied by scale for 1 / 3; and PVC-U pipes can avoid this problem very well; the cast iron pipes in the floor 1 are only rust-proofed and painted, which not only ensures the structural safety, but also solves the problem of blockage of the original cast iron pipes.

[0025] This embodiment also provides a construction method for the rapid repair structure of the sewage pipeline in the old residential building, including the following steps: Step 1: Preparation before construction: Before the construction starts, lay plastic sheets on the walkways from the door to the bathroom and kitchen, lay plywood on the floor of the kitchen and bathroom construction areas, and take measures to protect the finished products, that is, cover or temporarily remove the walls, tiles, ceilings and sanitary kitchen facilities; Step 2: Removal of old pipes: Workers use handheld cutting machines to cut and remove the original cast iron pipes that need to be replaced in sections, leaving the original cast iron pipes above and below the floor 1 with a length of no less than 10 cm for connection with the new pipes and leaving space for construction operations. After the original cast iron pipes are removed, they are manually transported out of the house and transported to the designated collection point outside the building, and cleared away after the construction is completed; Step 3: Surface treatment of old pipes: Because the original cast iron pipes have oil stains, residual paint powder and severe rust on the surface, the original cast iron pipes are manually polished and rusted, and then a layer of anti-rust paint is applied first, and then a layer of blending paint is applied after the anti-rust paint is dry; Step 4, pipe installation: in the outdoor work area, prefabricate the new pipe according to the size and shape of the indoor sewer pipe, including integrally forming the second pipe 31 and the first plug-in portion 32, and separately forming the third pipe 42 and the second plug-in portion 41. After the new pipe is manufactured, install it indoors; Step 5, waterproof treatment: waterproof treatment is performed on the joint between the first pipe 2 and the first connection node 3, and waterproof treatment is performed on the joint between the first pipe 2 and the second connection node 4; the waterproof treatment method for the joint between the first pipe 2 and the first connection node 3 is: wrap a circle of oil hemp silk around the outer side surface of the first plug section 322, and after the first plug section 322 is plugged into the first pipe 2, a water-tight and silicone sealant is applied to the joint between the two, and then oil hemp silk is wrapped around the outer side surface of the joint between the second pipe 31 and the first pipe 2, and a water-tight and silicone sealant is applied; the waterproof treatment method for the joint between the first pipe 2 and the second connection node 4 is the same as above; Step 6: Pipe fixing: Install two sets of lifting rings to connect and fix the pipe to the floor 1, and use two sets of vertical fixing clips 7 to connect and fix the pipe to the wall; Step 7, pipeline restoration: After the pipeline replacement is completed and the plugging material 5 is solidified, the sanitary ware and kitchen utensils that were removed or covered before the construction are restored, and civilized construction management is strengthened to reduce dust and noise, and clean up waste in a timely manner.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a technician familiar with the technical field can think of within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A quick maintenance structure for sewage pipelines in old residential buildings, characterized in that: It comprises a floor slab (1), a first pipe (2), a first connection node (3), and a second connection node (4); The first pipeline (2) passes through the floor slab (1), a first connection node (3) is provided at the upper end of the first pipeline (2), and a second connection node (4) is provided at the lower end of the first pipeline (2); The first connection node (3) comprises a second pipe (31) and a first plug-in portion (32); the first plug-in portion (32) is arranged at the lower end of the second pipe (31), and the first plug-in portion (32) and the second pipe (31) are integrally formed; the first plug-in portion (32) is a variable diameter hollow pipe, comprising a first variable diameter section (321) and a first plug-in portion (322); the diameter of the first variable diameter section (321) is gradually reduced from top to bottom, and the first plug-in portion (322) is arranged at the lower end of the first variable diameter section (321) and is plug-in-arranged with the first pipe (2); The second connection node (4) comprises a second plug-in portion (41) and a third pipe (42); the second plug-in portion (41) is a hollow pipe with a reduced diameter, comprising a connecting section (411), a second reduced diameter section (412) and a second plug-in section (413); the connecting section (411) is arranged at the lower end of the first pipe (2), the second reduced diameter section (412) is arranged at the lower end of the connecting section (411), the diameter of the second reduced diameter section (412) is gradually reduced from top to bottom, and the second plug-in section (413) is arranged at the lower end of the second reduced diameter section (412) and is plug-in-arranged with the third pipe (42); It also includes a plugging material (5), the plugging material (5) being arranged on the outer side surface of the second pipeline (31), the joint between the first connection node (3) and the first pipeline (2), the outer side surface of the first pipeline (2), and the joint between the second connection node (4) and the first pipeline (2); The plugging material (5) comprises a first plugging material (51), a second plugging material (52) and a third plugging material (53); The first plugging material (51) is disposed at multiple locations, respectively disposed on the outer side surface of the lower portion of the second pipe (31), the outer side surface of the lower end of the first plug section (322), the outer side surface of the lower portion of the first pipe (2), and the outer side surface of the lower end of the second plug section (413); The first plugging material (51) located on the outer side surface of the lower end of the first plugging section (322) is tightly pressed against the inner side surface of the first pipe (2), and the first plugging material (51) located on the outer side surface of the lower end of the second plugging section (413) is tightly pressed against the inner side surface of the third pipe (42); The second plugging material (52) is arranged on the upper end surface of the first plugging material (51); wherein the second plugging material (52) located on the outer side surface of the lower end of the first plugging section (322) is tightly pressed against the inner side surface of the first pipe (2), and the second plugging material (52) located on the outer side surface of the lower end of the second plugging section (413) is tightly pressed against the inner side surface of the third pipe (42); The third plugging material (53) is arranged on the upper end surface of the second plugging material (52); wherein the third plugging material (53) located on the outer side surface of the first diameter-reducing section (321) and the outer side surface of the second diameter-reducing section (412), the outer surfaces of the third plugging material (53) at the two locations are both flush with the outer surface of the first pipe (2).

2. A quick maintenance structure for sewage pipelines in old residential buildings as claimed in claim 1, characterized in that: It also includes an inspection port (6); when the third pipeline (42) is located at the bottom floor of the building, the inspection port (6) is provided on the outer side surface of the third pipeline (42) located below the second connection node (4); when the second pipeline (31) is located at the top floor of the building, the inspection port (6) is provided on the outer side surface of the second pipeline (31) located above the first connection node (3).

3. A quick maintenance structure for sewage pipelines in old residential buildings as claimed in claim 2, characterized in that: It also includes a vertical fixing card (7), which is arranged on the outer side of the second pipe (31) and the third pipe (42) and is used to fix the pipes to the wall.

4. A rapid maintenance structure for sewage pipelines in old residential buildings as claimed in claim 2, characterized in that: The first pipeline (2) is a cast iron pipe, and the second pipeline (31), the third pipeline (42), the first plug-in portion (32) and the second plug-in portion (41) are all plastic pipes.

5. A quick maintenance structure for sewage pipelines in old residential buildings as claimed in claim 4, characterized in that: The inner diameter of the connecting section (411) of the second plug-in portion (41) is greater than the outer diameter of the first pipe (2), and the connecting section (411) and the first pipe (2) are sleeve-connected.

6. A quick maintenance structure for sewage pipelines in old residential buildings as claimed in claim 2, characterized in that: The length of the first pipe (2) above the floor slab (1) and the length of the first pipe (2) below the floor slab (1) are both not less than 10 cm.

7. A rapid maintenance structure for sewage pipelines in old residential buildings as claimed in claim 4, characterized in that: The first plugging material (51) is made of oily hemp silk, the second plugging material (52) is made of water-tight glue, and the third plugging material (53) is made of silicone sealant.

8. The construction method of a rapid repair structure for sewage pipelines in old residential buildings as claimed in claim 7, characterized in that: The steps include: Step 1: Preparation before construction: Before the construction starts, lay plastic sheets on the walkways from the door to the bathroom and kitchen, lay plywood on the floor of the kitchen and bathroom construction areas, and take measures to protect the finished products, that is, cover or temporarily remove the walls, tiles, ceilings and sanitary kitchen facilities; Step 2: Removal of old pipes: Workers use handheld cutting machines to cut and remove the original cast iron pipes that need to be replaced into sections, leaving the original cast iron pipes above and below the floor slab (1) with a length of no less than 10 cm for connection with the new pipes and leaving space for construction operations. After the original cast iron pipes are removed, they are manually transported out of the house and transported to a designated storage point outside the building for removal after the construction is completed; Step 3: Surface treatment of old pipes: manually polish and remove rust from the original cast iron pipes, then apply a layer of anti-rust paint, and then apply a layer of blending paint after the anti-rust paint is dry; Step 4: Pipeline installation: In the outdoor work area, prefabricate new pipes according to the size and shape of indoor sewer pipes, and install them indoors after the new pipes are made; Step 5: waterproofing: waterproofing the joint between the first pipe (2) and the first connection node (3), and waterproofing the joint between the first pipe (2) and the second connection node (4); Step 6: Pipe fixing: install two sets of lifting rings to connect and fix the pipe to the floor (1), and use two sets of vertical fixing clips (7) to connect and fix the pipe to the wall; Step 7: Pipeline restoration: After the pipeline replacement is completed and the plugging material (5) is solidified, the sanitary ware and kitchen utensils that were removed or covered before construction are restored, and civilized construction management is strengthened to reduce dust and noise, and waste is cleaned up in a timely manner.

9. The construction method of a rapid repair structure for sewage pipelines in old residential buildings as claimed in claim 8, characterized in that: In step 4, prefabrication of the new pipeline includes integrally molding the second pipeline (31) and the first plug-in portion (32), and separately molding the third pipeline (42) and the second plug-in portion (41).

10. The construction method of a rapid repair structure for sewage pipelines in old residential buildings as claimed in claim 8, characterized in that: In step 5, the waterproof treatment method for the joint between the first pipe (2) and the first connection node (3) is as follows: a circle of oily hemp silk is wrapped around the outer side surface of the first plug-in section (322), and after the first plug-in section (322) and the first pipe (2) are plugged together, a water-tight silicone sealant is applied to the joint between the two, and then oily hemp silk is wrapped around the outer side surface of the joint between the second pipe (31) and the first pipe (2), and a water-tight silicone sealant is applied; the waterproof treatment method for the joint between the first pipe (2) and the second connection node (4) is the same as above.

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