Old cell pipeline minimally invasive replacement structure

Abstract

The utility model discloses an old community pipeline minimally invasive replacement structure, including the drain pipe of being worn in floor, be equipped with multilayer structure on the floor, be equipped with floor tile on the multilayer structure, at least one waterproof layer is equipped in the multilayer structure, be equipped with coaxial mounting through -hole on the floor the multilayer structure and floor tile, the drain pipe is worn the mounting through -hole, the outer periphery between the drain pipe and the floor is filled with the leaking stoppage layer, the outer periphery between the drain pipe and the multilayer structure and floor tile is equipped with non solidified waterproof paint layer, the drain pipe still is equipped with the sealing decoration cover of covering the non solidified waterproof paint layer and the mounting through -hole. The replacement structure of this replacement structure changes from the original " full -scale demolition " structure to " minimally invasive " structure, not only can shorten the construction period greatly, reduce building construction garbage, and have better waterproof performance, ensure that the floor and floor tile are no leakage and seepage after replacing the drain pipe.

Description

Technical Field

[0001] This utility model relates to the field of building pipeline construction technology, specifically to a minimally invasive replacement structure for pipelines in old residential communities. Background Technology

[0002] Old residential communities often face the problem of pipe replacement during the renovation of old buildings. Traditional pipe replacement follows the "complete demolition and reconstruction" model, with an average construction period of 45-60 days, which leads to residents having to relocate for a long time. According to statistics, 83% of complaints about old building renovation involve construction noise.

[0003] Moreover, technical defects during the renovation process can cause secondary damage. Water supply and drainage renovation requires decorative layers on walls, ceilings and floors, generating an average of 1.2 tons of construction waste per household, and the cost of secondary renovation increases by 37% after the renovation.

[0004] In addition, improper renovations can exacerbate social conflicts: the elderly population accounts for more than 40% of the population in old residential areas, and the high frequency and long duration of construction seriously affect the quality of life of special groups. Some projects have been forced to stop due to residents' opposition, and the renovation progress rate is less than 65%. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a minimally invasive replacement structure for pipelines in old residential communities.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A minimally invasive pipe replacement structure for old residential buildings includes a drain pipe inserted into a floor slab. A multi-layer structure is provided above the floor slab, and floor tiles are laid on the multi-layer structure. At least one waterproof layer is provided within the multi-layer structure. Coaxial installation through-holes are provided on the floor slab, the multi-layer structure, and the floor tiles. The drain pipe passes through the installation through-holes, and the difference between the inner diameter of the installation through-hole and the outer diameter of the drain pipe does not exceed 20mm. A leak-sealing layer is filled between the outer periphery of the drain pipe and the floor slab. A non-curing waterproof coating layer is provided between the outer periphery of the drain pipe and the multi-layer structure and the floor tiles. The non-curing waterproof coating layer is tightly connected to the waterproof layer. The lower end of the non-curing waterproof coating layer is connected to the leak-sealing layer, and the upper end protrudes from the floor tiles. A sealing decorative cap is also fitted onto the drain pipe, covering the non-curing waterproof coating layer and the installation through-holes.

[0007] The minimally invasive pipe replacement structure in this old residential community improves the installation and waterproofing structure of the newly installed drainage pipes, transforming the original "complete dismantling" structure into a "minimally invasive" structure. This not only significantly shortens the construction period and reduces construction waste, but also provides better waterproofing performance, ensuring that there are no leaks or seepage in the floor slabs and tiles after the drainage pipes are replaced.

[0008] Furthermore, the difference between the inner diameter of the mounting through hole and the outer diameter of the drain pipe is 10-20mm, and the hole is positioned with the central axis of the drain pipe as the center.

[0009] Furthermore, the sealing layer is a fast-hardening micro-expansion grout that fills the gap between the outer periphery of the drainage pipe and the floor slab.

[0010] Furthermore, the non-curing waterproof coating layer is a non-curing rubber asphalt coating that fills the annular gap between the outer periphery of the drainage pipe and the multi-layer structure and the floor tiles.

[0011] Furthermore, the upper end of the non-curing waterproof coating layer protrudes from the floor tile to form an inverted cone shape that is thick in the center and thin at the edges, and the inverted cone shape is covered with the sealing decorative cover.

[0012] Furthermore, the axial height of the inverted cone is 10-25 mm, and the sealing decorative cover includes a neutral silicone sealing strip disposed along the root of the inverted cone, and a PVC decorative cover fitted on top.

[0013] Furthermore, the multi-layer structure includes, from bottom to top, a slope-finding layer, a leveling layer, a waterproof layer, a waterproof protective layer, and a connecting mortar layer disposed between the floor slab and the floor tiles.

[0014] Furthermore, the upper and lower ends of the drain pipe are respectively bonded to the reserved pipe section with a socket, the axial length of the socket bonding is not less than 1.5 times the outer diameter of the drain pipe, and it is fixed on the outer periphery by pipe clamps.

[0015] Compared with existing technologies, the beneficial effects of this utility model are: 1. This minimally invasive replacement structure for pipelines in old residential areas improves the installation and waterproofing structures of newly installed drainage pipes, transforming the original "complete dismantling" structure into a "minimally invasive" structure. This not only significantly shortens the construction period and reduces construction waste, but also provides better waterproofing performance, ensuring no leakage or seepage in the floor slabs and tiles after the drainage pipes are replaced; 2. This minimally invasive replacement structure for pipelines in old residential areas also features a simple structure, ease of construction, and minimal environmental pollution. Construction minimally affects residents' normal lives, eliminates the need for relocation, and reduces additional living costs incurred due to drainage system renovations. It is particularly suitable for pipeline renovations in densely populated and structurally complex old residential areas; 3. The size of the installation through hole is only slightly larger than the outer diameter of the drain pipe, eliminating the need to drill large holes in the existing floor slab and floor tiles, or to remove the existing floor tiles and the existing structure beneath them; 4. The sealing layer can form a relatively stable leak-proof and seepage-proof structure between the drain pipe and the existing floor slab structure, and can connect the drain pipe; The non-curing waterproof coating layer can not only form a waterproof structure between the drain pipe and the existing floor tiles and multi-layer structure, but also connect the waterproof layer of the multi-layer structure to form a comprehensive waterproof structure; 5. The upper end of the non-curing waterproof coating layer is higher than the upper surface of the floor tiles. With the setting of the sealing decorative cover, it can prevent water seepage at the opening and water accumulation around the pipe, and is also more aesthetically pleasing, with no exposed structural adhesive. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of a minimally invasive pipeline replacement structure for old residential communities according to this utility model; Figure 2 This is a schematic diagram of the floor slab, multi-layer structure, and openings in the floor tiles of this utility model. Figure 3 This is a schematic diagram of the replacement and installation of the drainage pipe in the comparative example of this utility model; In the diagram: 1. Floor slab; 2. Slope-forming layer; 3. Leveling layer; 4. Waterproof layer; 5. Waterproof protective layer; 6. Connecting mortar layer; 7. Floor tiles; 8. Drainage pipe; 9. Installation through hole; 10. Leak-stopping layer; 11. Non-curing waterproof coating layer; 12. Sealing decorative cover; 13. Steel sleeve; 14. Waterproof sealing material; 15. Filling mortar; 16. Waterstop strip. Detailed Implementation

[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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 this utility model.

[0019] Example 1: A minimally invasive pipe replacement structure for old residential communities is provided, such as... Figure 1 and Figure 2 As shown, the system includes a drain pipe 8 inserted into a floor slab 1. A multi-layer structure is provided on the floor slab 1, and floor tiles 7 are provided on the multi-layer structure. At least one waterproof layer 4 is provided within the multi-layer structure. The floor slab 1, the multi-layer structure, and the floor tiles 7 are provided with coaxial mounting holes 9. The drain pipe 8 passes through the mounting holes 9, and the difference between the inner diameter of the mounting holes 9 and the outer diameter of the drain pipe 8 does not exceed 20mm. A sealing layer 10 is filled between the outer periphery of the drain pipe 8 and the floor slab 1. A non-curing waterproof coating layer 11 is provided between the outer periphery of the drain pipe 8 and the multi-layer structure and the floor tiles 7. The non-curing waterproof coating layer 11 is tightly connected to the waterproof layer 4. The lower end of the non-curing waterproof coating layer 11 is connected to the sealing layer 10, and the upper end protrudes from the floor tiles 7. A sealing decorative cap 12 is also fitted onto the drain pipe 8, covering the non-curing waterproof coating layer 11 and the mounting holes 9.

[0020] The minimally invasive replacement structure for the pipes in this old residential community improves the installation and waterproofing structure of the newly installed drainage pipe 8, transforming it from the original "complete dismantling" structure to a "minimally invasive" structure. This not only significantly shortens the construction period and reduces construction waste, but also provides better waterproofing performance, ensuring that there is no leakage or seepage in the floor slab 1 and floor tiles 7 after the drainage pipe is replaced.

[0021] The minimally invasive pipeline replacement structure for this old residential community is characterized by its simple structure, ease of construction, and minimal environmental pollution. During construction, it will not significantly affect residents' normal lives, and there is no need for residents to relocate. This reduces the additional living costs incurred by residents due to drainage renovations, making it particularly suitable for pipeline renovations in densely populated and structurally complex old residential communities.

[0022] The size of the installation through hole 9 is only slightly larger than the outer diameter of the drain pipe 8, enough to allow the drain pipe 8 to pass through and to be filled with sealing and plugging materials. There is no need to make large holes in the original floor slab and floor tiles, nor is it necessary to dig out the original floor tiles and the existing structure below the floor tiles.

[0023] The sealing layer 10 can form a relatively stable leak-proof and seepage-proof structure between the drainage pipe 8 and the existing floor slab structure, and can connect the drainage pipe 9; the non-curing waterproof coating layer 11 can not only form a waterproof structure between the drainage pipe 8 and the existing floor tiles and multi-layer structure, but also connect the waterproof layer of the multi-layer structure to form an all-round waterproof structure.

[0024] The upper end of the non-curing waterproof coating layer 11 is higher than the upper surface of the floor tile. With the setting of the sealing decorative cover 12, it can prevent water seepage at the opening and water accumulation around the pipe, and it is also more beautiful with no exposed structural adhesive. Moreover, it can protect the waterproof structure and extend its service life.

[0025] Furthermore, the difference between the inner diameter of the mounting through hole 9 and the outer diameter of the drain pipe 8 is 10-20mm, and the hole is positioned with the central axis of the drain pipe 8 as the center.

[0026] By controlling the difference between the inner diameter of the mounting through hole 9 and the outer diameter of the drain pipe 8 within this range, it is possible to avoid excessively large openings and ensure that the gap between the two can be easily filled with sealing material and non-cured waterproof material. The coaxial arrangement is conducive to the uniformity of the annular gap size, avoiding uneven filling of sealing material and non-cured waterproof material.

[0027] Furthermore, the sealing layer 10 is a fast-hardening micro-expansion grout that fills the gap between the outer periphery of the drainage pipe and the floor slab. It has a fast hardening speed, reduces the curing waiting time, and can expand appropriately during the curing process, which is beneficial for sealing.

[0028] Furthermore, the non-curing waterproof coating layer 11 is a non-curing rubber asphalt coating that fills the annular gap between the outer periphery of the drainage pipe and the multi-layer structure and the floor tiles. It is made of rubber, asphalt, softening oil and other main components, mixed with temperature control agents and fillers to maintain a viscous paste-like consistency during its service life. It can effectively seal the gap between the drainage pipe and the multi-layer structure and floor tiles, and has a certain degree of plasticity, allowing it to be shaped in the exposed part.

[0029] Furthermore, the upper end of the non-curing waterproof coating layer 11 protrudes from the floor tile to form an inverted cone (or truncated cone) shape that is thick in the center and thin at the edges, and the sealing decorative cover 12 is placed over the inverted cone shape.

[0030] The axial height of the inverted cone is 10-25 mm, and the sealing decorative cover 12 includes a neutral silicone sealing strip provided along the root of the inverted cone, and a PVC decorative cover fitted on top.

[0031] The inverted cone shape and the neutral silicone sealing strip can form a good sealing structure at the opening, which can prevent water accumulation and seepage. After the PVC decorative cover is put on, it can cover the non-cured waterproof coating and the sealing strip, and can also squeeze the two together to make them tightly connected.

[0032] Furthermore, the multi-layer structure includes, from bottom to top, a slope-forming layer 2, a leveling layer 3, a waterproof layer 4, a waterproof protective layer 5, and a connecting mortar layer 6, arranged between the floor slab 1 and the floor tiles 7. The waterproof layer 4 and the non-curing waterproof coating layer 11 together form the waterproof structure of the entire floor structure, with good integrity. The waterproof protective layer 5 can add a waterproof barrier and also protect the waterproof layer, ensuring long-lasting and effective waterproofing.

[0033] Furthermore, the upper and lower ends of the drain pipe 8 are respectively bonded to the reserved pipe section with a socket, the axial length of the socket bonding is not less than 1.5 times the outer diameter of the drain pipe, and it is fixed on the outer periphery by pipe clamps.

[0034] One construction method for this minimally invasive pipeline replacement structure is as follows: (1) Positioning and cutting: Leave 200mm above and below the pipe section to be replaced, use an angle grinder (with metal cutting disc) to cut the old cast iron pipe and remove the old pipe section.

[0035] (2) Drilling: Position the pipe center and use a Φ125mm water drill (with a matching Φ110mm new PVC drainage pipe) to penetrate the floor slab, remove the residue, and the hole diameter = drainage pipe outer diameter + 15mm.

[0036] (3) New pipe installation: Insert Φ110mm PVC-U drainage pipe and adjust the verticality; glue the upper and lower pipe sections together (using special PVC glue), the bonding length is ≥1.5 times the pipe diameter, ensure the connection effectiveness, and install pipe clamps to fix it.

[0037] (4) Grouting with suspended formwork: A circular steel formwork is erected on the ground floor and fixed firmly against the bottom surface of the floor slab; quick-hardening micro-expansion grout is mixed (the water-to-material ratio is usually 0.13-0.15); it is poured into the annular gap (the annular gap around the drain pipe) on the ground floor and tamped until it is flush with the upper surface of the floor slab. After 1 hour, the strength is ≥20MPa, forming the leak-stopping layer.

[0038] (5) Non-curing coating construction: Heat the non-curing coating to 160°C, pour the molten coating into the annular joint, and form a 20mm thick inverted cone shape with a thick center and thin edges on the surface of the floor tile to obtain the non-curing waterproof coating layer.

[0039] (6) Install the sealing decorative cover: After the non-curable waterproof coating layer cools to normal temperature (sticky to the touch but not flowing), apply a circle of neutral silicone sealant (bead diameter of about 8mm) along the root of the cone, fit the PVC decorative cover (central hole Φ=116mm, with a reserved 6mm gap), press down firmly while rotating to extrude a uniform and full sealant ring, and clean up the excess squeezed sealant.

[0040] (7) Water tightness test (24 hours): Block the upstream of the lowest point of the pipeline on this floor (e.g., above the toilet interface) with an airbag, inject water to a level 50mm above the local floor slab surface, and let it stand for 24 hours.

[0041] (8) Inspection: (a) This floor: around the pipelines, interfaces and decorative covers; (b) Key inspection on the ceiling of the lower floor: the position corresponding to the floor penetration and the surrounding range of 300mm.

[0042] Water level control: Measured with a scale, with an error of ±1mm; the high water level (50mm) provides sufficient hydrostatic pressure.

[0043] Leakage judgment: By visual inspection combined with touch, it is qualified if there is no water stain, water droplet or dampness. This judgment standard is intuitive, clear and commonly used in the industry.

[0044] Detectable leakage rate: Slow leakage as low as the level of 0.1 mL / min can be detected (by observing tiny water stains or the expansion of damp spots after a long period of time).

[0045] Effect verification: For 10 residential bathroom pipeline replacement points constructed according to this embodiment, after the above 24-hour water tightness test, there is no dampness or water trace on the ceiling of the lower floor. After 1 year of follow-up use, there is no leakage at all. Compared with the traditional mortar plugging (water tightness test failure rate >30%, leakage rate within 1 year >15%), this solution achieves zero leakage.

[0046] Comparative example: A traditional "complete disassembly and reassembly" construction mode is provided.

[0047] As Figure 3 shown, in this structure and construction method, it is necessary to open a relatively large hole in the floor slab, the outer periphery of the drainage pipe 8 needs to be sleeved with a steel sleeve 13, a waterproof sealing material 14 needs to be filled between the two, a water stop strip 16 needs to be arranged on the outer periphery of the steel sleeve 13, and more cement mortar 15 needs to be poured for repairing the opening. The waterproof structure and floor tiles above the floor slab 1 also need to be redone.

[0048] Through construction in a unit building of an old residential community, compared with the embodiment, the replacement structure and construction method changes from "complete disassembly" to "minimally invasive", the construction period is shortened from 45-60 days to 7-10 days, and the construction waste is reduced from 1.2 tons per household to less than 0.2 tons per household. It not only improves the renovation efficiency and reduces the comprehensive cost, but also reduces environmental pollution and residential conflicts.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A minimally invasive replacement structure for pipelines in old residential communities, comprising a drainage pipe running through a floor slab, characterized in that, A multi-layer structure is provided above the floor slab, and floor tiles are provided on the multi-layer structure. At least one waterproof layer is provided within the multi-layer structure. The floor slab, the multi-layer structure, and the floor tiles are provided with coaxial installation through holes. The drain pipe passes through the installation through holes, and the difference between the inner diameter of the installation through holes and the outer diameter of the drain pipe does not exceed 20mm. A leak-stopping layer is filled between the outer periphery of the drain pipe and the floor slab. A non-curing waterproof coating layer is provided between the outer periphery of the drain pipe, the multi-layer structure, and the floor tiles. The non-curing waterproof coating layer is tightly connected to the waterproof layer. The lower end of the non-curing waterproof coating layer is connected to the leak-stopping layer, and the upper end protrudes from the floor tiles. A sealing decorative cap is also fitted on the drain pipe to cover the non-curing waterproof coating layer and the installation through holes.

2. The minimally invasive pipeline replacement structure for old residential communities according to claim 1, characterized in that, The difference between the inner diameter of the mounting through hole and the outer diameter of the drain pipe is 10-20mm, and the hole is positioned with the central axis of the drain pipe as the center.

3. The minimally invasive pipeline replacement structure for old residential communities according to claim 1, characterized in that, The sealing layer is a fast-hardening micro-expansion grout that fills the gap between the outer periphery of the drainage pipe and the floor slab.

4. The minimally invasive pipeline replacement structure for old residential communities according to claim 1, characterized in that, The non-curing waterproof coating layer is a non-curing rubber asphalt coating that fills the annular gap between the outer periphery of the drainage pipe and the multi-layer structure and the floor tiles.

5. The minimally invasive pipeline replacement structure for old residential communities according to claim 1, characterized in that, The upper end of the non-curing waterproof coating layer protrudes from the floor tile to form an inverted cone shape that is thick in the center and thin at the edges, and the inverted cone shape is covered with the sealing decorative cover.

6. The minimally invasive pipeline replacement structure for old residential communities according to claim 5, characterized in that, The axial height of the inverted cone is 10-25mm, and the sealing decorative cover includes a neutral silicone sealing strip provided along the root of the inverted cone, and a PVC decorative cover fitted on top.

7. The minimally invasive pipeline replacement structure for old residential communities according to claim 1, characterized in that, The multi-layer structure includes, from bottom to top, a slope-finding layer, a leveling layer, a waterproof layer, a waterproof protective layer, and a connecting mortar layer disposed between the floor slab and the floor tiles.

8. The minimally invasive pipeline replacement structure for old residential communities according to claim 1, characterized in that, The upper and lower ends of the drain pipe are respectively bonded to the reserved pipe section with a socket. The axial length of the socket bonding is not less than 1.5 times the outer diameter of the drain pipe, and it is fixed on the outer periphery by pipe clamps.

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