Embedded sleeve and pipeline connection plugging structure and construction method

Abstract

The invention discloses a connection plugging structure for an embedded sleeve and a pipeline. The connection plugging structure comprises the embedded sleeve, the pipeline and a filling layer. The embedded sleeve comprises a fixed pipe and a strain pipe, a vibration isolation cavity is formed between the fixed pipe and the strain pipe, and the vibration isolation cavity is filled with a vibration isolation material to form a vibration isolation layer; the pipeline is arranged in the embedded sleeve; the filling layer is arranged between the embedded sleeve and the pipeline and comprises a first sealing layer, a fireproof layer, a reinforcing layer and a second sealing layer which are arranged from the inner layer to the outer layer; the two ends of the filling layer are further provided with connecting pieces. The problems that a traditional plugging technology is single in function, poor in durability and the like are solved, and the multiple functions of water prevention, fire prevention, structure supporting, thermal expansion and cold contraction and pipeline displacement compensation are integrated. And in addition, later repair is reduced to a certain extent, construction efficiency and quality are improved, manpower and materials are saved, benefits are improved, and construction is safe.

Description

Technical Field

[0001] The present invention belongs to the technical field of embedded pipelines, and more specifically, relates to a plugging structure for connecting an embedded casing and a pipeline and a construction method. Background Art

[0002] In construction projects, many industrial pipelines, such as circulating water pipes and firefighting water pipes, are installed indoors and extend from indoors to the site. During factory construction, to save pipeline costs and facilitate standardized management, the pipeline layout is generally not changed, and construction is carried out according to the design drawings. When the pipeline is extended, it is necessary to break a hole in the wall to pass through it. In some special scenarios, it is necessary to avoid damaging the wall's performance. This requires the use of pre-buried sleeves. These sleeves are pre-buried in the wall at the opening, and the pipeline is then passed through the pre-buried sleeves. This protects the wall structure while providing space for the pipeline's routing. The main purpose of sealing the gap between the pre-buried sleeve and the pipeline is to ensure that the gap between the two is completely sealed to prevent the leakage of water or other liquids, thereby enhancing its waterproof performance.

[0003] In the prior art, a Chinese patent with publication number CN211775815U discloses a simple pre-buried casing plugging device, including a plugging device body provided on the pre-buried casing, the plugging device body including a tension link sleeved in the pre-buried casing, the two ends of the tension link symmetrically sleeved with a limiter, a seal and a plugging member from the inside to the outside, and the ends are fastened together by fasteners to achieve plugging. The use of the present invention to provide a pre-buried casing plugging device can achieve tooling, standardization and standardized construction, ensure the cleanliness of the pre-buried casing, provide a favorable installation environment for the later pipeline installation, and avoid the process of filling the inside of the casing during the casing processing process, without generating any construction waste, saving construction costs. The device has a simple structure, is easy to operate and has high construction efficiency. It can be used multiple times, is easy to install and disassemble, and can avoid leakage in the exterior wall while saving costs.

[0004] However, the Chinese patent, publication number CN211775815U, fails to address fire protection, fails to compensate for thermal expansion and contraction of the pipeline, and the gap between the casing and the pipeline is not tightly sealed, making it susceptible to damage. Therefore, a pre-buried casing and pipeline connection sealing structure and construction method are needed that integrates waterproofing, fire protection, structural support, thermal expansion and contraction compensation, and pipeline displacement, addressing the single nature and shortcomings of existing pre-buried pipelines. Summary of the Invention

[0005] In response to the above defects or improvement needs of the prior art, the present invention provides a pre-buried sleeve and pipeline connection sealing structure and construction method. By arranging a vibration isolation layer in the vibration isolation cavity, when the equipment vibrates or the foundation settles, the vibration isolation layer absorbs the vibration energy, avoiding a large interaction force between the pipeline and the wall, and ensuring the safe operation of the pipeline; by arranging a first sealing layer, a fireproof layer and a reinforcement layer between the pre-buried sleeve and the pipeline, the waterproof, fireproof and supporting properties of the pre-buried sleeve are enhanced, avoiding the impact of extreme conditions on the strength of the wall during long-term use, and then causing safety accidents; the two ends of the filling layer are sealed by a connecting piece, and support is provided between the pre-buried sleeve and the pipeline, so as to avoid shaking of the pipeline during operation and affecting safety.

[0006] To achieve the above objectives, according to a first aspect of an embodiment of the present invention, there is provided a pre-buried sleeve and pipeline connection plugging structure, comprising a pre-buried sleeve, a pipeline, and a filling layer;

[0007] The embedded sleeve includes a fixed tube and a strain tube, a vibration isolation cavity is provided between the fixed tube and the strain tube, and the vibration isolation cavity is filled with a vibration isolation material to form a vibration isolation layer;

[0008] The pipeline is arranged in the embedded casing;

[0009] The filling layer is provided between the embedded casing and the pipeline, and includes a first sealing layer, a fireproof layer, a reinforcement layer and a second sealing layer arranged from the inner layer to the outer layer;

[0010] Connectors are also provided at both ends of the filling layer.

[0011] Furthermore, the fixed pipe is embedded in the wall, and a water stop is provided on its outer ring. The water stop is a flat annular plate, and lower edge baffles are provided on both sides of its inner ring.

[0012] An annular groove is further provided at a position away from the center of the opening on the wall, and the fixing pipe is fixed in the annular groove;

[0013] The strain tube passes through the wall, and two circumferential upper edge blocking pieces are provided on the outer surface of the strain tube, and the upper edge blocking pieces are arranged between the lower edge blocking pieces on both sides.

[0014] Furthermore, the lower edge baffle and the upper edge baffle are both arranged in the vibration isolation cavity, and the outer ring and the inner ring of the embedded casing are respectively waterproofed by the lower edge baffle and the upper edge baffle, and the lower edge baffle and the upper edge baffle are arranged in the vibration isolation layer. The vibration isolation layer is squeezed by the lower edge baffle and the upper edge baffle. When the pipeline or wall vibrates, the energy is transferred to the vibration isolation layer through the lower edge baffle and the upper edge baffle, thereby reducing the rigidity between the pipeline or the wall, avoiding the breakage of the pipeline when the wall vibrates, or damaging the strength of the wall when the pipeline vibrates.

[0015] Furthermore, a circle of return spring is provided between the lower edge baffle and the upper edge baffle, which enhances the elasticity between the lower edge baffle and the upper edge baffle. When encountering large vibrations, it provides greater restoring force for the embedded sleeve to avoid exceeding the elastic limit of the vibration isolation layer.

[0016] A pre-buried casing and pipeline connection sealing structure according to any one of claims 1 to 4, characterized in that the first sealing layer and the second sealing layer are both filled with silicone sealant, the fireproof layer comprises fireproof mud and high-temperature resistant ceramic fiber mesh cloth, and the reinforcement layer is fiber-reinforced polymer mortar;

[0017] The first sealing layer and the second sealing layer are connected at both ends, wrapping the fireproof layer and the reinforcement layer therein and sealing them to prevent water from penetrating and affecting the connection strength.

[0018] Furthermore, space is reserved between both ends of the filling layer and the wall as an installation position, and the connecting member is arranged in the installation position. The connecting member includes an annular blocking plate, a connecting plate, a connecting head and a clamping cylinder.

[0019] Furthermore, the annular plugging plate is a rigid plate with an outer diameter equal to the inner diameter of the strain gauge tube and an inner diameter equal to the outer diameter of the pipeline. It is positioned between the two, providing further support for the strain gauge tube and pipeline and sealing both ends. The outer end surface of the annular plugging plate is flush with the wall surface, and the connecting plate is an annular plate positioned at the joint between the annular plugging plate and the wall surface. The connecting plate is anchored to the wall via anchors to limit the position of the annular plugging plate.

[0020] Furthermore, a connector is provided on the outer end of the inner ring of the annular plugging plate close to the pipe surface. The connector is integrally provided with the annular plugging plate, and a thread is provided on the surface of the connector.

[0021] The pipe is covered with a cartridge, the inner diameter of the cartridge close to the connector is the same as the outer diameter of the connector, and the inner diameter of the cartridge away from the connector is the same as the outer diameter of the pipe;

[0022] The end of the cartridge close to the connector is provided with an internal thread, which is connected to the connector through the internal thread. The fitting relationship between the end of the cartridge away from the connector and the pipe is: transitioning from a clearance fit to an interference fit in the direction away from the connector.

[0023] Furthermore, plugs are provided at both ends of the pipe, and the plugs include a spherical panel, a fixing rod and a fixing head;

[0024] The inner side of the spherical panel is a spherical surface, which is arranged in the pipeline and is made of elastic material;

[0025] A plurality of fixing rods extend inward from the inner edge of the spherical panel. The fixing rods extend to the end of the cartridge close to one end of the connector. The ends of the fixing rods are provided with fixing heads which are buckled onto the cartridge through the fixing heads.

[0026] According to a second aspect of the present invention, a construction method for a pre-buried casing and a pipeline connection plugging structure is provided, which specifically includes the following steps:

[0027] S100, placing the fixed tube and the strain gauge tube at corresponding positions, keeping them concentric, placing rubber therebetween, and vulcanizing and molding them to form a pre-buried casing;

[0028] S200, when building a wall, a circular groove is reserved in the wall, and the embedded sleeve is embedded in the circular groove;

[0029] S300, placing the pipe in the strain gauge tube and pre-fixing it, and applying silicone sealant on the outer wall of the pipe and the inner wall of the strain gauge tube to form a first sealing layer and a second sealing layer;

[0030] S400, applying fireproof mud on the surface of the first sealing layer to fully mix the fireproof mud with the high temperature resistant ceramic fiber mesh to form a fireproof layer;

[0031] S500, filling fiber-reinforced polymer mortar between the fireproof layer and the second sealing layer to form a reinforcement layer;

[0032] S600: After the filling layer reaches the designed strength, annular blocking plates are embedded at both ends and fixed to the wall using connecting plates;

[0033] S700, put the cartridge on the pipe and tighten it to the connector;

[0034] S800, install plugs at both ends of the pipeline, allow the ball panel to enter the interior of the pipeline, squeeze the pipe mouth, and use the fixed head to buckle on the cartridge to achieve plugging of both ends of the pipeline.

[0035] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0036] 1. The pre-buried sleeve and pipeline connection sealing structure of the present invention provides a vibration isolation layer in the vibration isolation cavity. When the equipment vibrates or the foundation settles, the vibration isolation layer absorbs the vibration energy, avoids the generation of a large interaction force between the pipeline and the wall, and ensures the safe operation of the pipeline; a first sealing layer, a fireproof layer and a reinforcement layer are provided between the pre-buried sleeve and the pipeline to enhance the waterproof, fireproof and supporting performance of the pre-buried sleeve between them, and avoid the influence of extreme conditions on the strength of the wall during long-term use, thereby causing safety accidents; the two ends of the filling layer are sealed by connecting pieces, and support is provided between the pre-buried sleeve and the pipeline, so as to avoid shaking of the pipeline during operation and affecting safety.

[0037] 2. In the sealing structure for connecting the embedded sleeve and the pipeline of the present invention, the silicone sealant has excellent elasticity and can effectively cope with the displacement of the strain tube and the pipeline caused by thermal expansion and contraction. During the filling process, it ensures full contact between the first sealing layer and the pipeline, and full contact between the first sealing layer and the strain tube. By combining the high-temperature resistant ceramic fiber mesh cloth with the fireproof mud, the structural strength of the fireproof mud is enhanced to prevent cracking or falling off under the action of long-term high temperature or external force. The fiber-reinforced polymer mortar is used to improve the overall strength between the filling layers, avoid the shaking of the pipeline caused by long-term vibration, provide the necessary rigid support for the entire sealing structure, enhance its stability, so as to withstand certain external forces, and protect the internal first sealing layer and fireproof layer at the same time.

[0038] 3. The embedded sleeve and pipeline connection sealing structure of the present invention respectively completes the waterproofing of the outer ring and inner ring of the embedded sleeve through the lower edge baffle and the upper edge baffle, and the lower edge baffle and the upper edge baffle are arranged in the vibration isolation layer. The vibration isolation layer is squeezed by the lower edge baffle and the upper edge baffle. When the pipeline or wall vibrates, the energy is transferred to the vibration isolation layer through the lower edge baffle and the upper edge baffle, thereby reducing the rigidity between the pipeline or the wall, avoiding the breakage of the pipeline caused by the vibration of the wall, or damage to the strength of the wall caused by the vibration of the pipeline.

[0039] 4. The embedded sleeve of the present invention is connected to the pipeline and the sealing structure further reinforces the pipeline through the connector and the clamp, and reduces the gap between it and the pipeline through the interference fit of the end of the clamp, thereby blocking the water on the surface of the pipeline and preventing water from flowing into the internal structure along the pipeline.

[0040] 5. The pre-buried sleeve and pipeline connection sealing structure of the present invention solves the problems of single function and poor durability of traditional sealing technology, and realizes the multi-faceted function integration of waterproofing, fire prevention, structural support, thermal expansion and contraction, and pipeline displacement compensation; and to a certain extent, it reduces the need for later repairs, speeds up construction efficiency and quality, saves manpower and materials, and improves efficiency and safe construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1This is a schematic diagram of the installation of a pre-buried casing and pipeline connection sealing structure according to an embodiment of the present invention;

[0042] Figure 2 This is a structural schematic diagram of a pre-buried casing and pipeline connection and blocking structure according to an embodiment of the present invention;

[0043] Figure 3 This is a cross-sectional view of the installation of a pre-buried sleeve and pipeline connection sealing structure according to an embodiment of the present invention;

[0044] Figure 4 This is a structural cross-sectional view of a pre-buried casing and pipeline connection and plugging structure according to an embodiment of the present invention;

[0045] Figure 5 This is a cross-sectional view of another filling layer structure of a pre-buried casing and pipeline connection plugging structure according to an embodiment of the present invention;

[0046] Figure 6 This is a flow chart of a construction method for a pre-buried casing and pipeline connection sealing structure according to an embodiment of the present invention.

[0047] In all the drawings, the same figure marks represent the same technical features, specifically: 1-wall, 2-embedded sleeve, 21-fixed pipe, 22-strain tube, 23-waterstop, 24-lower edge baffle, 25-upper edge baffle, 26-vibration isolation cavity, 3-pipeline, 4-filling layer, 41-first sealing layer, 42-fireproof layer, 43-reinforcement layer, 44-second sealing layer, 5-connector, 51-annular plug, 52-connecting plate, 53-connecting head, 54-cylinder, 6-plug, 61-spherical panel, 62-fixing rod, 63-fixing head. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0049] Example 1

[0050] like Figure 1-4As shown, an embodiment of the present invention provides a pre-buried sleeve and pipeline connection and plugging structure, comprising: a pre-buried sleeve 2 disposed in a wall 1, a pipeline 3 disposed in the pre-buried sleeve 2, and a filling layer 4 disposed between the pre-buried sleeve 2 and the pipeline 3. The pre-buried sleeve 2 includes a fixed tube 21 and a strain gauge tube 22, with a vibration isolation cavity 26 defined between the fixed tube 21 and the strain gauge tube 22. The vibration isolation cavity 26 is filled with a vibration isolation material to form a vibration isolation layer. The filling layer 4 includes a first sealing layer 41, a fireproof layer 42, a reinforcement layer 43, and a second sealing layer 44, arranged from inner to outer layers. Connectors 5 are also provided at both ends of the filling layer 4. By setting a vibration isolation layer in the vibration isolation cavity 26, when the equipment vibrates or the foundation settles, the vibration isolation layer absorbs the vibration energy, avoiding the generation of a large interaction force between the pipeline 3 and the wall 1, and ensuring the safe operation of the pipeline 3; by setting a first sealing layer 41, a fireproof layer 42 and a reinforcement layer 43 between the embedded sleeve 2 and the pipeline 3, the waterproof, fireproof and supporting properties of the embedded sleeve 2 are enhanced, avoiding the impact of extreme conditions on the strength of the wall during long-term use, thereby causing safety accidents; the two ends of the filling layer 4 are sealed by the connecting piece 5, and it provides support between the embedded sleeve 2 and the pipeline 3 to avoid shaking of the pipeline 3 during operation, which affects safety.

[0051] The fixed tube 21 is embedded in the wall 1. Its outer ring is equipped with a waterstop 23, a flat, annular plate. Lower edge retaining plates 24 are located inward on both sides of its inner ring. An annular groove is also formed away from the center of the opening in the wall 1, into which the fixed tube 21 is secured. The strain gauge tube 22 extends through the wall 1. Two circumferential upper edge retaining plates 25 are located on its outer surface, positioned between the lower edge retaining plates 24. The lower edge baffle 24 and the upper edge baffle 25 are both arranged in the vibration isolation cavity 26, and the outer ring and inner ring of the embedded sleeve 2 are waterproofed respectively by the lower edge baffle 24 and the upper edge baffle 25, and the lower edge baffle 24 and the upper edge baffle 25 are arranged in the vibration isolation layer. The vibration isolation layer is squeezed by the lower edge baffle 24 and the upper edge baffle 25. When the pipe 3 or the wall 1 vibrates, the energy is transferred to the vibration isolation layer through the lower edge baffle 24 and the upper edge baffle 25, thereby reducing the rigidity between the pipe 3 and the wall 1, avoiding the breakage of the pipe 3 when the wall 1 vibrates, or damaging the strength of the wall 1 when the pipe 3 vibrates.

[0052] In a preferred embodiment, the filling material used in the vibration isolation layer is hard rubber, which absorbs vibration energy and restores the relative position between the wall 1 and the pipe 3 after the vibration ends.

[0053] In a preferred embodiment, a circle of return spring (not shown in the figure) is provided between the lower edge baffle 24 and the upper edge baffle 25. The return spring enhances the elasticity between the lower edge baffle 24 and the upper edge baffle 25, and provides a greater restoring force for the embedded sleeve 2 when encountering large vibrations, thereby avoiding exceeding the elastic limit of the vibration isolation layer.

[0054] The first sealing layer 41 and the second sealing layer 44 are both filled with silicone sealant, the fireproof layer 42 includes fireproof mud and high-temperature resistant ceramic fiber mesh cloth, and the reinforcement layer 43 is fiber-reinforced polymer mortar. Among them, the silicone sealant has excellent elasticity and can effectively cope with the displacement of the strain tube 22 and the pipeline 3 caused by thermal expansion and contraction. During the filling process, it ensures full contact between the first sealing layer 41 and the pipeline 3, and full contact between the first sealing layer 41 and the strain tube 22. By combining the high-temperature resistant ceramic fiber mesh cloth with the fireproof mud, the structural strength of the fireproof mud is enhanced to prevent cracking or falling off under the action of long-term high temperature or external force. The fiber-reinforced polymer mortar improves the overall strength between the filling layers 4, prevents the pipeline 3 from shaking due to long-term vibration, provides necessary rigid support for the entire sealing structure, enhances its stability, so as to withstand certain external forces, and protects the internal first sealing layer 41 and fireproof layer 42 at the same time.

[0055] like Figure 5 As shown, in another embodiment of the present invention, the first sealing layer 41 and the second sealing layer 44 are connected at both ends, wrapping the fireproof layer 42 and the reinforcement layer 43 therein and sealing them to prevent water from penetrating and affecting the connection strength.

[0056] There is space reserved at both ends of the filling layer 4 from the wall as an installation position, and the connecting member 5 is arranged in the installation position. The connecting member 5 includes an annular plugging plate 51, a connecting plate 52, a connecting head 53 and a clamping sleeve 54. Among them, the annular plugging plate 51 is a rigid plate, and its outer diameter is the same as the inner diameter of the strain tube 22, and its inner diameter is the same as the outer diameter of the pipe 3. It is arranged between the two to provide further support for the strain tube 22 and the pipe 3, and to seal the two ends. The outer end face of the annular plugging plate 51 is flush with the wall surface of the wall 1. The connecting plate 52 is an annular plate, which is arranged at the joint between the annular plugging plate 51 and the wall surface. The connecting plate 52 is anchored to the wall 1 by anchor nails to limit the annular plugging plate 51. A connecting head 53 is provided at the outer end of the inner ring of the annular plugging plate 51 close to the surface of the pipe 3. The connecting head 53 is integrated with the annular plugging plate 51, and the surface of the connecting head 53 is provided with a thread. The pipe 3 is fitted with a cartridge 54. The inner diameter of the cartridge 54's end near the connector 53 is the same as its outer diameter, while the inner diameter of the end away from the connector 53 is the same as the outer diameter of the pipe 3. The cartridge 54's end near the connector 53 is internally threaded, connecting to the connector 53 via this internal thread. The fit between the cartridge 54's end away from the connector 53 and the pipe 3 transitions from a clearance fit to an interference fit as it moves away from the connector 53. The connector 53 and cartridge 54 further reinforce the pipe 3, and the interference fit at the cartridge 54's end reduces the gap between it and the pipe 3, blocking water on the pipe 3's surface and preventing it from flowing down the pipe into the internal structure.

[0057] Both ends of the pipe 3 are also provided with plugs 6, and the plugs 6 include a spherical panel 61, a fixing rod 62 and a fixing head 63. The inner side of the spherical panel 61 is a spherical surface, which is arranged in the pipe 3, and the spherical surface is made of elastic material. A plurality of fixing rods 62 extend inward from the inner edge of the spherical panel 61, and the fixing rods 62 extend to the end of the cartridge 54 close to one end of the connector 53, and the ends of the fixing rods 62 are provided with fixing heads 63, which are buckled on the cartridge 54 through the fixing heads 63. The spherical panel 61 is temporarily fixed to the two ends of the pipe 3 by the fixing rods 62 and the fixing heads 63 to seal it, so as to prevent debris or insects from entering the pipe 3 and causing blockage of the pipe 3. When connection is required, the plugs 6 at both ends can be removed.

[0058] Example 2

[0059] like Figure 6 As shown, an embodiment of the present invention provides a construction method for a pre-buried casing and a pipeline connection plugging structure, which specifically includes the following steps:

[0060] S100, placing the fixed tube 21 and the strain gauge tube 22 at corresponding positions, keeping them concentric, placing rubber therebetween and vulcanizing them to form the embedded sleeve 2;

[0061] S200, when building a wall, a circular groove is reserved in the wall, and the embedded sleeve 2 is embedded in the circular groove;

[0062] S300: Place the pipe 3 in the strain gauge tube 22 and pre-fix it. Apply silicone sealant to the outer wall of the pipe 3 and the inner wall of the strain gauge tube 22 to form a first sealing layer 41 and a second sealing layer 44.

[0063] S400, applying fireproof mud on the surface of the first sealing layer 41 with a high temperature resistant ceramic fiber mesh cloth, and fully mixing the fireproof mud with the high temperature resistant ceramic fiber mesh cloth to form a fireproof layer 42;

[0064] S500, filling fiber-reinforced polymer mortar between the fireproof layer 42 and the second sealing layer 44 to form a reinforcement layer 43;

[0065] S600: After the filling layer 4 reaches the designed strength, annular blocking plates 51 are embedded at both ends of the filling layer 4 and the connecting plates 52 are used to fix the filling layer 4 to the wall.

[0066] S700, put the cartridge 54 on the pipe 3 and tighten it to the connector 53;

[0067] S800, install plugs 6 at both ends of the pipe 3, allow the ball panel 61 to enter the interior of the pipe 3, and squeeze the pipe mouth, use the fixed head 63 to buckle on the cartridge 54 to achieve blocking of both ends of the pipe 3.

[0068] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pre-buried casing and pipeline connection plugging structure, characterized in that: It comprises a pre-buried casing (2), a pipeline (3) and a filling layer (4); The embedded sleeve (2) comprises a fixed tube (21) and a strain tube (22); a vibration isolation cavity (26) is provided between the fixed tube (21) and the strain tube (22); and the vibration isolation cavity (26) is filled with a vibration isolation material to form a vibration isolation layer; The pipeline (3) is arranged in the pre-buried sleeve (2); The filling layer (4) is provided between the embedded sleeve (2) and the pipeline (3), and comprises a first sealing layer (41), a fireproof layer (42), a reinforcement layer (43), and a second sealing layer (44) arranged from the inner layer to the outer layer; Connecting pieces (5) are also provided at both ends of the filling layer (4).

2. A pre-buried casing and pipeline connection blocking structure according to claim 1, characterized in that: The fixed pipe (21) is embedded in the wall (1), and a water stop (23) is provided on the outer ring thereof. The water stop (23) is a flat annular plate, and lower edge baffles (24) are provided inwardly on both sides of the inner ring thereof. An annular groove is further provided at a portion of the opening on the wall (1) away from the center, and the fixing pipe (21) is fixed in the annular groove; The strain tube (22) passes through the wall (1), and two circumferential upper edge blocking pieces (25) are provided on the outer surface of the strain tube (22), and the upper edge blocking pieces (25) are arranged between the lower edge blocking pieces (24) on both sides.

3. A pre-buried casing and pipeline connection blocking structure according to claim 2, characterized in that: The lower edge baffle (24) and the upper edge baffle (25) are both arranged in the vibration isolation cavity (26), and the outer ring and the inner ring of the embedded casing (2) are waterproofed respectively by the lower edge baffle (24) and the upper edge baffle (25), and the lower edge baffle (24) and the upper edge baffle (25) are arranged in the vibration isolation layer, and the vibration isolation layer is squeezed by the lower edge baffle (24) and the upper edge baffle (25). When the pipeline (3) or the wall (1) vibrates, the energy is transferred to the vibration isolation layer by the lower edge baffle (24) and the upper edge baffle (25), thereby reducing the rigidity between the pipeline (3) and the wall (1), and avoiding the pipeline (3) from being broken when the wall (1) vibrates, or the strength of the wall (1) from being damaged when the pipeline (3) vibrates.

4. A pre-buried casing and pipeline connection blocking structure according to claim 3, characterized in that: A circle of return spring is further provided between the lower edge stop piece (24) and the upper edge stop piece (25). The return spring enhances the elasticity between the lower edge stop piece (24) and the upper edge stop piece (25), and provides a greater restoring force for the embedded sleeve (2) when encountering a large vibration, thereby avoiding exceeding the elastic limit of the vibration isolation layer.

5. A pre-buried casing and pipeline connection and blocking structure according to any one of claims 1 to 4, characterized in that: The first sealing layer (41) and the second sealing layer (44) are both filled with silicone sealant, the fireproof layer (42) includes fireproof mud and high-temperature resistant ceramic fiber mesh cloth, and the reinforcement layer (43) is fiber-reinforced polymer mortar; The first sealing layer (41) and the second sealing layer (44) are connected at both ends, and the fireproof layer (42) and the reinforcement layer (43) are wrapped therein and sealed to prevent water from penetrating and affecting the connection strength.

6. A pre-buried casing and pipeline connection and blocking structure according to any one of claims 1 to 4, characterized in that: Space is reserved at both ends of the filling layer (4) from the wall surface as an installation position, and the connecting member (5) is arranged in the installation position. The connecting member (5) includes an annular blocking plate (51), a connecting plate (52), a connecting head (53) and a clamping cylinder (54).

7. A pre-buried casing and pipeline connection blocking structure according to claim 6, characterized in that: The annular blocking plate (51) is a rigid plate, the outer diameter of which is the same as the inner diameter of the strain tube (22), and the inner diameter of which is the same as the outer diameter of the pipe (3). The annular blocking plate (51) is arranged between the strain tube (22) and the pipe (3), providing further support for the strain tube (22) and the pipe (3), and sealing both ends. The outer end surface of the annular blocking plate (51) is flush with the wall surface of the wall (1). The connecting plate (52) is an annular plate, arranged at the joint between the annular blocking plate (51) and the wall surface. The connecting plate (52) is anchored to the wall (1) by anchor nails, thereby limiting the position of the annular blocking plate (51).

8. The pre-buried casing and pipeline connection blocking structure according to claim 7, characterized in that: A connector (53) is provided on the outer end of the inner ring of the annular plugging plate (51) close to the surface of the pipe (3). The connector (53) and the annular plugging plate (51) are integrally provided, and a thread is provided on the surface of the connector (53). The pipe (3) is sleeved with a cartridge (54), wherein the inner diameter of the end of the cartridge (54) close to the connector (53) is the same as the outer diameter of the connector (53), and the inner diameter of the end of the cartridge (54) away from the connector (53) is the same as the outer diameter of the pipe (3); The end of the cartridge (54) close to the connector (53) is provided with an internal thread, and is connected to the connector (53) through the internal thread. The fitting relationship between the end of the cartridge (54) away from the connector (53) and the pipe (3) is: a transition from a clearance fit to an interference fit in the direction away from the connector (53).

9. The pre-buried casing and pipeline connection blocking structure according to claim 8, characterized in that: Both ends of the pipe (3) are further provided with plugs (6), and the plugs (6) include a spherical panel (61), a fixing rod (62) and a fixing head (63); The inner side of the spherical panel (61) is a spherical surface, which is arranged in the pipe (3), and the spherical surface is made of elastic material; A plurality of fixing rods (62) extend inward from the inner edge of the spherical panel (61), and the fixing rods (62) extend to the end of the cartridge (54) close to one end of the connector (53), and a fixing head (63) is provided at the end of the fixing rod (62), which is buckled onto the cartridge (54) through the fixing head (63).

10. A construction method for a pre-buried casing and pipeline connection plugging structure according to any one of claims 1 to 9, characterized in that: The specific steps include: S100, placing the fixed tube (21) and the strain tube (22) in corresponding positions, keeping them concentric, placing rubber therein and vulcanizing and molding them to form a pre-buried sleeve (2); S200, when building a wall, a ring groove is reserved in the wall, and the embedded sleeve (2) is embedded in the ring groove; S300, placing the pipe (3) in the strain tube (22), pre-fixing it, and applying silicone sealant to the outer wall of the pipe (3) and the inner wall of the strain tube (22) to form a first sealing layer (41) and a second sealing layer (44); S400, applying a high-temperature resistant ceramic fiber mesh cloth on the surface of the first sealing layer (41), and brushing fireproof mud to fully mix the fireproof mud and the high-temperature resistant ceramic fiber mesh cloth to form a fireproof layer (42); S500, filling fiber-reinforced polymer mortar between the fireproof layer (42) and the second sealing layer (44) to form a reinforcement layer (43); S600, after the filling layer (4) reaches the designed strength, annular blocking plates (51) are embedded at both ends thereof and fixed to the wall surface using connecting plates (52); S700, put the cartridge (54) on the pipe (3) and tighten it to the connector (53); S800, plugs (6) are installed at both ends of the pipeline (3), the ball panel (61) is allowed to enter the interior of the pipeline (3), and the pipe mouth is squeezed, and the fixed head (63) is buckled on the cartridge (54) to achieve the blocking of both ends of the pipeline (3).

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