Embedded pipe for modular integrated building casting process

Abstract

The utility model relates to the technical field of modular integrated building, especially a kind of embedded pipeline for the pouring process of modular integrated building, including sleeve and connecting rib, sleeve can be inserted formwork and is through pouring cavity, the axial position of sleeve is fixed relative to formwork, connecting rib fixedly connects sleeve and structural steel bar, to make sleeve embedded in modular integrated building after pouring is finished, and then form the pipeline that is through the pouring of modular integrated building, its beneficial effects are not only solve the problem of inaccurate positioning, easy to deviate in traditional embedding process, also provide reliable technical support for the integration, standardization arrangement of internal pipeline system of modular building, significantly improve the overall performance and construction efficiency of building.

Description

Technical Field

[0001] This utility model relates to the technical field of modular integrated buildings, and in particular to a pre-embedded pipe used in the pouring process of modular integrated buildings. Background Technology

[0002] With the development of prefabricated building technology, especially the application of modular integrated building (MiC), it is known as the 4.0 era of prefabricated construction. This construction method can be widely used in various building projects, including high-rise buildings and residential projects, hotels and tourist resorts, education and medical facilities, etc. Pre-installation and embedding, as one of the commonly used technologies in these projects, have seen their application prospects become more extensive with the development of prefabricated building technology. However, the pre-installation of modules within MiC itself has become a pain point in this field.

[0003] Integrated Manufacturing (MIC) buildings, as a highly industrialized construction method, have been widely used in recent years. They break down buildings into multiple modular units, prefabricated in factories, and then transported to the construction site for assembly. In this process, pre-embedded pipes are crucial for ensuring the quality of pipe installation, the building's waterproofing performance, and the overall structural stability. However, existing pre-embedded pipes used in MIC integrated buildings on the market currently have several problems:

[0004] MIC integrated building emphasizes efficient assembly, while traditional pre-embedded pipes often require complex positioning and fixing operations during installation. For example, some pre-embedded pipes need to be precisely welded on the construction site, which not only consumes a lot of time and manpower, but is also prone to affecting the installation accuracy of subsequent pipes due to installation errors, thus reducing construction efficiency. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides a pre-embedded pipe for the pouring process of modular integrated buildings. It solves the technical problem that the pre-embedded pipe in the prior art needs to be precisely welded on the construction site, which not only consumes a lot of time and manpower, but is also prone to affecting the installation accuracy of subsequent pipes due to installation errors, thus reducing construction efficiency.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] In the first aspect, this utility model provides a pre-embedded pipe for the pouring process of modular integrated buildings. The modular integrated buildings are formed by enclosing a pouring cavity with a template and then pouring the concrete after setting structural steel bars in the pouring cavity. The pre-embedded pipe includes a sleeve and a connecting bar. The sleeve can be inserted into the template and penetrate the pouring cavity. The axial position of the sleeve is fixed relative to the template. The connecting bar fixes the sleeve and the structural steel bars so that the sleeve is pre-embedded in the modular integrated building after the pouring is completed, thereby forming a pipe that penetrates the pouring of the modular integrated building.

[0010] In one technical solution of this utility model, an inner tube is also included. The inner tube is axially inserted into the sleeve and its axial position relative to the sleeve is fixed. One end of the inner tube forms a first flange, which can abut against the outer wall of the template to limit the axial position of the sleeve relative to the template.

[0011] In one technical solution of this utility model, a second flange and a locking member are also included; when the inner tube is inserted into the sleeve, the locking member can apply a sliding force to the second flange towards the first flange so that the sleeve is clamped between the first flange and the second flange.

[0012] In one technical solution of this utility model, the locking component includes a bolt and a nut. The bolt passes through the first flange and the second flange. After the nut is tightened on the bolt, the sleeve is clamped between the first flange and the second flange.

[0013] In one technical solution of this utility model, the outer diameter of the second flange is greater than the inner diameter of the sleeve, but less than or equal to the outer diameter of the sleeve.

[0014] In one technical solution of this utility model, the sleeve is provided in various length models; the length of the sleeve is equal to the sum of the width of the casting cavity and the thickness of the templates on both sides.

[0015] In one technical solution of this utility model, a first sealing element and a second sealing element are also included, both of which are used to establish a sealing relationship between the sleeve and the template.

[0016] In one technical solution of this utility model, a first sealing element is disposed between the first flange and the template to establish a sealing relationship between the template and the first flange, thereby establishing a sealing relationship between the sleeve and the template; a second sealing element is disposed on the outer wall of the sleeve away from the first flange to establish a sealing relationship between the sleeve and the template.

[0017] In one technical solution of this utility model, a boss is provided on the first flange; when the inner tube is inserted into the sleeve, the boss can cooperate with the inner wall of the sleeve to limit the radial position of the inner tube relative to the sleeve.

[0018] (III) Beneficial Effects

[0019] The beneficial effects of this utility model are as follows: Firstly, the pre-embedded pipe used in the pouring process of modular integrated buildings achieves high stability of the pre-embedded pipe in complex pouring environments by rigidly connecting the sleeve to the structural steel reinforcement. This significantly reduces the risk of rework due to pipe displacement in traditional construction, improving the reliability of construction quality. Secondly, the sleeve penetrates the entire pouring cavity and is exposed at both ends, avoiding structural damage and construction difficulties caused by later drilling or pipe insertion, thus enhancing the overall integrity and durability of the building. Furthermore, this pre-embedding method is highly compatible with the industrialized production process of modular buildings, allowing installation to be completed in the factory prefabrication stage, reducing on-site work, and does not rely on precise welding, thereby accelerating the construction progress and meeting the high efficiency and high quality requirements of prefabricated buildings. Simultaneously, the standardized sleeve and connecting bars facilitate mass production and quality control, helping to reduce material waste and labor costs, demonstrating good economic efficiency and promotional value.

[0020] This technical solution not only solves the problems of inaccurate positioning and easy deviation in traditional pre-embedded processes, but also provides reliable technical support for the integrated and standardized layout of internal pipeline systems in modular buildings, significantly improving the overall performance and construction efficiency of buildings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the sleeve and connecting rib structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the pre-embedded pipe structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the inner tube structure of this utility model;

[0024] Figure 4 This is one of the structural schematic diagrams showing the pre-embedded pipe in use according to this utility model;

[0025] Figure 5 This is the second schematic diagram of the pre-embedded pipe structure of this utility model.

[0026] [Explanation of Labels in the Attached Image]

[0027] 100: Template;

[0028] 200: Structural reinforcement;

[0029] A: Casting cavity;

[0030] 1: Sleeve;

[0031] 2: Connecting ribs;

[0032] 3: Inner tube; 3a: First flange; 3aa: Boss;

[0033] 4: Second flange;

[0034] 5: Locking component; 51: Bolt; 52: Nut. Detailed Implementation

[0035] To better explain and facilitate understanding of this utility model, the following description is provided in conjunction with the appendix. Figures 1-5 This invention will be described in detail through specific embodiments. Wherein, directional terms such as "upper" and "lower" are used in this document. Figure 1 The orientation is used as a reference.

[0036] Example 1:

[0037] Reference Figures 1-5 This utility model provides a pre-embedded pipe for the pouring process of a modular integrated building. The modular integrated building is formed by a formwork 100 surrounding a pouring cavity A, and is poured after structural steel bars 200 are set in the pouring cavity A. The pre-embedded pipe includes a sleeve 1 and a connecting bar 2. The sleeve 1 can be inserted into the formwork 100 and penetrate the pouring cavity A. The axial position of the sleeve 1 is fixed relative to the formwork 100. The connecting bar 2 fixes the sleeve 1 and the structural steel bars 200 so that the sleeve 1 is pre-embedded in the modular integrated building after the pouring is completed, thereby forming a pipe that penetrates the pouring of the modular integrated building.

[0038] Specifically, modular integrated buildings typically employ a formwork system 100 to enclose a closed casting cavity A, within which a structural steel reinforcement frame 200 is arranged before concrete pouring. During this process, a sleeve 1 can be directly inserted axially between the formwork 100s, spanning the entire casting cavity A, with both ends exposed on the inner and outer sides of the formwork 100s for subsequent pipeline routing and connection. To ensure that the sleeve 1 does not shift or float during pouring, its axial position is relatively fixed through its cooperation with the formwork 100, thereby guaranteeing the accuracy of the pipeline path.

[0039] Furthermore, one end of the connecting bar 2 is firmly welded or tied to the structural steel reinforcement 200 of the main building structure, while the other end is reliably connected to the outer wall of the sleeve 1, for example, by welding, so that the sleeve 1 and the structural steel reinforcement 200 skeleton form an integral load-bearing system. During the concrete pouring process, the connecting bar 2 can effectively resist the impact and buoyancy brought by the concrete flow, preventing the sleeve 1 from shifting or floating due to uneven stress, and ensuring its positional accuracy in the final formed component. As the concrete solidifies, the sleeve 1 is completely wrapped and firmly anchored inside the building module, forming a pre-embedded channel running through the entire component, providing convenience for the subsequent installation of water and electricity pipelines, communication cables, or other functional pipes.

[0040] This technical solution achieves several advantages. First, by rigidly connecting the sleeve 1 to the structural reinforcing steel 200, the pre-embedded pipe achieves high stability in complex casting environments, significantly reducing the risk of rework due to pipe displacement in traditional construction and improving the reliability of construction quality. Second, the sleeve 1 penetrates the entire casting cavity A and is exposed at both ends, avoiding structural damage and construction difficulties caused by later drilling or pipe insertion, thus enhancing the overall integrity and durability of the building. Furthermore, this pre-embedding method is highly compatible with the industrialized production process of modular buildings, allowing installation to be completed in the factory prefabrication stage, reducing on-site work, and does not rely on precise welding, thereby accelerating construction progress and meeting the high efficiency and high quality requirements of prefabricated buildings. Simultaneously, the standardized sleeve 1 and connecting steel 2 facilitate mass production and quality control, helping to reduce material waste and labor costs, demonstrating good economic efficiency and promotional value.

[0041] This technical solution not only solves the problems of inaccurate positioning and easy deviation in traditional pre-embedded processes, but also provides reliable technical support for the integrated and standardized layout of internal pipeline systems in modular buildings, significantly improving the overall performance and construction efficiency of buildings.

[0042] Reference Figures 1-5 The pre-embedded pipe also includes an inner pipe 3, which is axially inserted into the sleeve 1 and fixed in axial position relative to the sleeve 1. One end of the inner pipe 3 forms a first flange 3a, which can abut against the outer wall of the template 100 to limit the axial position of the sleeve 1 relative to the template 100.

[0043] In this embodiment, the inner tube 3 significantly improves the positioning accuracy, installation stability, and construction adaptability of the pre-embedded pipe. The inner tube 3 is inserted axially into the sleeve 1, and the first flange 3a can tightly abut against the outer wall of the template 100 in the installed state, forming an effective axial limiting support. When the sleeve 1 passes through the template 100 and crosses the pouring cavity A, the contact between the first flange 3a and the outer wall of the template 100 can accurately limit the axial installation position of the sleeve 1, preventing it from moving back and forth or deviating in depth under the action of concrete pressure, thereby achieving precise positioning of the sleeve 1 in three-dimensional space.

[0044] Reference Figures 1-5 The pre-embedded pipe also includes a second flange 4 and a locking element 5; when the inner pipe 3 is inserted into the sleeve 1, the locking element 5 can apply a force to the second flange 4 to slide axially toward the first flange 3a, so that the sleeve 1 is clamped between the first flange 3a and the second flange 4.

[0045] The locking element 5 includes a bolt 51 and a nut 52. The bolt 51 passes through the first flange 3a and the second flange 4. After the nut 52 is tightened on the bolt 51, the sleeve 1 is clamped between the first flange 3a and the second flange 4.

[0046] In this embodiment, the addition of a second flange 4 and a locking element 5 further enhances the axial positioning reliability and overall structural stability of the pre-embedded pipeline system on the template 100. When the inner pipe 3 is inserted into the sleeve 1, the second flange 4 is fitted over the bolt 51 and located at the other end of the sleeve 1, forming a clamping structure for both ends of the sleeve 1 in conjunction with the first flange 3a. At this time, by sequentially passing the bolt 51 through the first flange 3a, the end of the sleeve 1, and the second flange 4, and tightening the nut 52 at the exposed end of the bolt 51, the bolt 51 generates axial tension as the nut 52 is tightened, driving the second flange 4 to slide towards the first flange 3a, thereby tightly clamping the pipe wall portion of the sleeve 1 between the first flange 3a and the second flange 4.

[0047] Specifically, the diameters of the first flange 3a and the second flange 4 are both larger than the inner diameter of the sleeve 1, thereby forming a clamping part on the outer edge of the first flange 3a and the second flange 4 that presses against the sleeve 1.

[0048] Example 2:

[0049] Reference Figures 1-5 In addition to possessing all the technical solutions of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0050] The outer diameter of the second flange 4 is greater than the inner diameter of the sleeve 1 and less than or equal to the outer diameter of the sleeve 1, which makes it easier to set the sleeve 1 of the inner tube 3 through the template 100, thus improving work efficiency.

[0051] Example 3:

[0052] Reference Figures 1-5 In addition to possessing all the technical solutions of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0053] The sleeve 1 is provided in various length models; the length of the sleeve 1 is greater than or equal to the sum of the width of the casting cavity A and the thickness of the templates 100 on both sides, preferably equal, to ensure that the sleeve 1 has sufficient length to penetrate the casting cavity A and the templates 100 on both sides.

[0054] In this embodiment, when the length of the sleeve 1 is equal to the sum of the width of the pouring cavity A and the thickness of the two side templates 100, and by precisely setting the length of the sleeve 1 to be equal to the sum of the pouring space and the thickness of the two side templates 100, the first flange 3a and the second flange 4 can both be located outside the template 100 and clamp the template 100, thereby improving the positional accuracy and stability of the pre-embedded pipe.

[0055] Specifically, the sleeve 1 is designed in various lengths to accommodate modular building components and formwork 100 systems of different thicknesses, thereby enhancing the versatility and engineering applicability of the embedded pipe structure. In practical applications, the width of the casting cavity A and the thickness of the formwork 100 on both sides may differ. By providing sleeves 1 in a series of lengths, they can be flexibly selected according to specific engineering parameters, ensuring that the embedded components can accurately match the actual installation space.

[0056] When the length of sleeve 1 is exactly equal to the sum of the width of the casting cavity A and the thickness of the two side templates 100, sleeve 1 can completely penetrate the entire template 100-casting cavity A system, with its two ends extending to the outer surfaces of the two side templates 100 respectively, achieving precise embedding without gaps, protrusions or depressions.

[0057] In this configuration, after the inner pipe 3 is inserted into the sleeve 1, the first flange 3a at one end can be tightly attached to the outer wall of one side of the template 100, while the second flange 4 at the other end is located on the outside of the opposite side template 100. Bolts 51 pass through the first flange 3a and the second flange 4, and nuts 52 are tightened, thus clamping the entire template 100 system in the middle from both sides. At this time, the sleeve 1 not only serves as a through-channel but also as a structural tie rod connecting the two templates 100, making the embedded pipe assembly and the template 100 system form a stable integrated structure. This clamping fixing method significantly enhances the positioning stiffness of the embedded pipe in three-dimensional space, effectively suppressing the bulging of the template 100 or the displacement of the sleeve 1 caused by the lateral pressure of concrete during pouring, while also preventing the sleeve 1 from axially sliding or rotating circumferentially under the impact of flowing concrete.

[0058] Since both the first flange 3a and the second flange 4 are located outside the template 100 and are clamped uniformly by bolts 51, the entire embedded system forms a symmetrical and balanced stress state on the surface of the template 100. This ensures that the axis of the sleeve 1 is highly perpendicular to the template 100, greatly improving the positional accuracy of the embedded channel. This not only ensures the straightness and alignment of the embedded pipe in the final concrete component but also provides a good connection benchmark for pipeline connection during subsequent multi-module docking, reducing the amount of on-site pipeline misalignment and adjustment work. In addition, the clamping force is transmitted through the template 100, ensuring that the sleeve 1 remains stable throughout the entire pouring process and is not affected by secondary stresses such as shrinkage and settlement during concrete setting.

[0059] This design also brings significant convenience to construction operations. Construction workers do not need to use additional complex positioning brackets or welding fixing devices. By selecting the matching length of the sleeve 1 and tightening the bolts 51, they can achieve quick and reliable installation, greatly reducing human operation errors. This not only achieves high-precision and high-stability installation of the pre-embedded pipes, but also strengthens the overall rigidity of the formwork 100 system, improves the forming quality of concrete components, and increases construction efficiency.

[0060] Example 4:

[0061] Reference Figures 1-5 In addition to possessing all the technical solutions of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0062] The pre-embedded pipe also includes a first sealing element and a second sealing element, both of which are used to establish a sealing relationship between the sleeve 1 and the template 100. The first sealing element is located between the first flange 3a and the template 100 to establish a sealing relationship between the template 100 and the first flange 3a, thereby establishing a sealing relationship between the sleeve 1 and the template 100; the second sealing element is located on the outer wall of the sleeve 1 away from the first flange 3a to establish a sealing relationship between the sleeve 1 and the template 100.

[0063] In this embodiment, the technical solution also integrates a first sealing element and a second sealing element to form a multi-layer sealing barrier, effectively ensuring the airtightness of the pouring environment and the molding quality of the components, improving the sealing performance of the pre-embedded pipeline system during the pouring process, and preventing concrete slurry from leaking from the gap between the template 100 and the sleeve 1.

[0064] The first sealing element can be made of elastic material such as a rubber gasket or a silicone sealing ring. The second sealing element can be designed as an elastic sealing ring or an expansion sealing sleeve fitted around the outer circumference of the sleeve 1, with its outer diameter slightly larger than the reserved hole diameter on the template 100. After the sleeve 1 is installed in place, the second sealing element is squeezed between the outer wall of the sleeve 1 and the hole wall of the template 100, forming a radial seal. This sealing structure can effectively seal the annular gap between the sleeve 1 and the hole of the template 100. Especially when the template 100 undergoes slight deformation or hole deviation due to repeated use, it can still maintain a good sealing effect by relying on elastic deformation, preventing concrete from leaking from this side during high-pressure pouring or vibration.

[0065] Through the synergistic effect of the first and second sealing elements, the pre-embedded pipe system achieves reliable sealing at both ends of the sleeve 1 penetrating the formwork 100, improving construction efficiency and the appearance quality of the finished product. Furthermore, the good sealing performance also helps maintain the overall stability of the formwork 100 system, preventing internal pressure imbalance caused by localized grout loss, thereby reducing the possibility of formwork bulging or displacement of the formwork 100.

[0066] Example 5:

[0067] Reference Figures 1-5 In addition to possessing all the technical solutions of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0068] The first flange 3a is provided with a boss 3aa; when the inner tube 3 is inserted into the sleeve 1, the boss 3aa can cooperate with the inner wall of the sleeve 1 to limit the radial position of the inner tube 3 relative to the sleeve 1.

[0069] In this embodiment, the boss 3aa extends radially and is embedded in the inner wall area of ​​the sleeve 1. By mating with the inner wall of the sleeve 1, it forms an effective radial limiting structure, which can constrain the lateral displacement of the inner tube 3 in the sleeve 1 and prevent it from shaking, eccentric or locally bending due to external force disturbance during installation or concrete pouring, thereby ensuring that the axis of the inner tube 3 and the axis of the sleeve 1 remain highly coaxial.

[0070] The boss 3aa further enhances the circumferential fixing effect between the inner tube 3 and the sleeve 1. The contact surface between the boss 3aa and the inner wall of the sleeve 1 prevents the inner tube 3 from rotating relative to the sleeve 1. When the nut 52 is tightened, the bolt 51 may cause the inner tube 3 to twist, but the friction between the boss 3aa and the sleeve 1 can effectively reduce this torque, improving the smoothness and reliability of the locking process. At the same time, this structure also helps maintain the compression uniformity of the first seal, avoiding failure due to uneven stress on the seal caused by flange deflection.

[0071] The boss 3aa can be integrally formed with the first flange 3a, requiring no additional parts or complex processes, resulting in a simple structure and controllable cost. By rationally designing the dimensions and tolerances of the boss 3aa, a moderate interference fit and transition fit can be achieved while ensuring smooth assembly, balancing ease of installation and positioning accuracy.

[0072] It can be understood that, except for conflicting parts, the above embodiments 1-9 can be freely combined to form other embodiments of this utility model.

[0073] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0074] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0075] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0076] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0077] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An embedded pipe for the casting process of a modular integrated building, wherein the modular integrated building is formed by a casting cavity (A) enclosed by a template (100) and cast by setting structural steel bars (200) in the casting cavity (A), characterized in that: The pre-embedded pipe includes a sleeve (1) and a connecting bar (2). The sleeve (1) can be inserted into the template (100) and pass through the casting cavity (A). The axial position of the sleeve (1) is fixed relative to the template (100). The connecting bar (2) is fixedly connected to the sleeve (1) and the structural steel bar (200) so that the sleeve (1) can be pre-embedded in the modular integrated building after the casting is completed, thereby forming a pipe that passes through the casting of the modular integrated building.

2. The embedded pipe for the modular integrated building casting process as described in claim 1, characterized in that: It also includes an inner tube (3), which is axially inserted into the sleeve (1) and fixed in axial position relative to the sleeve (1). One end of the inner tube (3) forms a first flange (3a), which can abut against the outer wall of the template (100) to limit the axial position of the sleeve (1) relative to the template (100).

3. The embedded pipe for the modular integrated building casting process as described in claim 2, characterized in that: It also includes a second flange (4) and a locking element (5); When the inner tube (3) is inserted into the sleeve (1), the locking member (5) can apply an axial sliding force to the second flange (4) towards the first flange (3a) so that the sleeve (1) is clamped between the first flange (3a) and the second flange (4).

4. The embedded pipe for the modular integrated building casting process as described in claim 3, characterized in that: The locking component (5) includes a bolt (51) and a nut (52). The bolt (51) passes through the first flange (3a) and the second flange (4). After the nut (52) is tightened on the bolt (51), the sleeve (1) is clamped between the first flange (3a) and the second flange (4).

5. The embedded pipe for the modular integrated building casting process as described in claim 3, characterized in that: The outer diameter of the second flange (4) is greater than the inner diameter of the sleeve (1) and less than or equal to the outer diameter of the sleeve (1).

6. The embedded pipe for the modular integrated building casting process as described in claim 5, characterized in that: The sleeve (1) is available in various length models; The length of the sleeve (1) is equal to the sum of the width of the casting cavity (A) and the thickness of the templates (100) on both sides.

7. The embedded pipe for the modular integrated building casting process as described in claim 6, characterized in that: It also includes a first seal and a second seal, both of which are used to establish a sealing relationship between the sleeve (1) and the template (100).

8. The embedded pipe for the modular integrated building casting process as described in claim 7, characterized in that: The first sealing element is disposed between the first flange (3a) and the template (100) to establish a sealing relationship between the template (100) and the first flange (3a), thereby establishing a sealing relationship between the sleeve (1) and the template (100); The second seal is disposed on the outer wall of the sleeve (1) away from the first flange (3a) to establish a sealing relationship between the sleeve (1) and the template (100).

9. The embedded pipe for the casting process of modular integrated buildings as described in claim 2, characterized in that: The first flange (3a) is provided with a boss (3aa); When the inner tube (3) is inserted into the sleeve (1), the boss (3aa) can cooperate with the inner wall of the sleeve (1) to limit the radial position of the inner tube (3) relative to the sleeve (1).

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