Existing building pipeline transition waterproof and drainage structure

Abstract

The invention relates to the technical field of constructional engineering, and discloses an existing building pipeline transition waterproof and drainage structure which comprises a tube well arranged on the top face of a second building single body and located between electromechanical equipment and a curtain wall, a deformation joint is formed between the tube well and the curtain wall, and a line passing cavity is formed in the tube well; a line passing opening communicated with the line passing cavity is formed in the tube well, a pipeline of the electromechanical equipment sequentially passes through the line passing opening and the line passing cavity, penetrates through the top face of the second building single body, passes through the deformation joint and penetrates through the curtain wall and then enters the first building single body, and the line passing opening is provided with a water retaining part which can prevent rainwater from entering the line passing cavity; the waterproof cornice is arranged on the curtain wall, and the waterproof cornice can cover the deformation joint when being observed in the vertical direction. The existing building pipeline transition waterproof and drainage structure aims at solving the problem that in the prior art, when a pipeline of electromechanical equipment crosses a deformation joint, rainwater is extremely prone to leaking into a building along the outer wall of the pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, in particular to a transition waterproof and drainage structure for existing building pipelines. Background Art

[0002] Existing buildings are typically renovated and expanded by combining multiple building units, such as a taller tower (the first building unit) and a lower podium (the second building unit). To accommodate potential uneven settlement, thermal expansion and contraction, and seismic activity between these units, structural expansion joints must be installed between them.

[0003] In renovation projects, a large amount of mechanical and electrical equipment (such as air conditioning units and ventilation equipment) is often installed on the lower podium roof, while serving the taller building tower. This inevitably requires a large number of mechanical and electrical pipelines (such as refrigerant pipes, water pipes, and cables) to start from the podium roof, cross and pass through the expansion joint between the tower and podium, and finally penetrate the tower curtain wall to enter the interior. When the mechanical and electrical pipelines pass through the expansion joint, they become a direct channel for rainwater to enter the building interior.

[0004] Specifically, when rainwater flows through the tower curtain wall facade or lands in the deformation joint area, it is very easy to flow along the outer wall of the pipeline. Since the bonding interface between the pipeline and the waterproof layer or the first sealant is extremely small, and is affected by temperature changes (thermal expansion and contraction of the pipeline itself), vibration, and building displacement for a long time, traditional sealing measures (such as applying the first sealant) are very easy to crack, age, or detach, forming a leakage path. Once the seal fails, rainwater will flow unimpeded along the outer wall of the pipeline through the curtain wall and into the interior of the building. This type of leakage not only erodes the building structure, but also poses a serious threat to the safe operation of the pipeline itself. Summary of the Invention

[0005] The purpose of the present invention is to provide a transition waterproof and drainage structure for existing building pipelines, aiming to solve the problem in the prior art that when the pipelines of electromechanical equipment cross the deformation joints, rainwater easily leaks along the outer wall of the pipelines into the interior of the building.

[0006] To achieve the above-mentioned object, the present invention provides a pipeline transition waterproofing and drainage structure for an existing building, wherein the existing building includes a first building unit and a second building unit spaced apart in a horizontal direction, wherein a curtain wall is provided on the end face of the first building unit adjacent to the second building unit, and electromechanical equipment is installed on the top face of the second building unit, wherein pipelines of the electromechanical equipment pass through the curtain wall and enter the interior of the first building unit, and the pipeline transition waterproofing and drainage structure for an existing building comprises:

[0007] A pipe well, the pipe well being provided on the top surface of the second building unit, the pipe well being located between the electromechanical equipment and the curtain wall, a deformation joint being provided between the pipe well and the curtain wall, a wire passage cavity being provided inside the pipe well, a wire passage opening being provided on the pipe well and communicating with the wire passage cavity, the pipelines of the electromechanical equipment sequentially passing through the wire passage opening, the wire passage cavity, through the top surface of the second building unit, through the deformation joint, through the curtain wall and into the interior of the first building unit, the wire passage opening being provided with a water retaining portion to prevent rainwater from entering the wire passage cavity;

[0008] A waterproof overhang is provided on the curtain wall, and when viewed in the vertical direction, the waterproof overhang can cover the deformation joint.

[0009] Furthermore, a drainage ditch is provided between the electromechanical equipment and the pipe well, the top surface of the waterproof eaves has a first drainage slope toward the pipe well, and the pipe well has a second drainage slope toward the drainage ditch.

[0010] Furthermore, the existing building pipeline transition drainage structure also includes a waterstop, and a first sealant is connected between the top surface of the pipe well and the bottom surface of the waterproof eaves. One end of the waterstop is arranged on the waterproof eaves, and the other end of the waterstop is adhered to the upper end of the pipe well through the first sealant.

[0011] Furthermore, the existing building pipeline transition waterproofing and drainage structure also includes a foam filling plate, which is arranged in the deformation joint, and the two sides of the foam filling plate are respectively connected to the curtain wall and the pipe shaft.

[0012] Furthermore, a fire barrier strip is provided at the lower end of the foam-filled plate.

[0013] Furthermore, a drainage ditch is provided between the curtain wall and the second building unit, and the drainage ditch is located below the fire barrier.

[0014] Furthermore, the drainage trough has a third drainage slope.

[0015] Furthermore, the water retaining portion includes a rainproof shutter provided at the wire passing opening.

[0016] Furthermore, a drying portion is provided on the wire passing port, and the drying portion is arranged on the inner side of the water retaining portion.

[0017] Furthermore, the drying section includes a drying fan.

[0018] Compared with the prior art, the transition waterproofing and drainage structure for existing building pipelines according to the embodiment of the present invention has the following advantages:

[0019] 1. Achieve source shielding and active protection: By setting up waterproof eaves on the curtain wall that can cover the expansion joints, rainwater flowing down the curtain wall facade or falling directly can be intercepted at the source to prevent it from directly eroding and invading the expansion joints and pipelines passing through the area, transforming traditional passive blocking into active shielding and protection.

[0020] 2. Centralized storage and orderly transition: The pipe well provides a centralized, protected internal passageway for multiple pipelines that need to cross expansion joints. This not only aligns and organizes the previously chaotic pipeline layout but, more importantly, isolates the pipelines from the harsh external environment. The water retaining feature at the passageway further prevents rainwater from entering the passageway, providing a second layer of protection for the pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of an existing building pipeline transition waterproofing and drainage structure according to an embodiment of the present invention;

[0022] Figure 2 2. It is a structural schematic diagram of a waterproof overhanging eave of an existing building pipeline transition waterproof drainage structure according to an embodiment of the present invention;

[0023] In the figure, 1, the first building unit;

[0024] 2. The second building unit;

[0025] 3. Curtain wall

[0026] 4. Mechanical and electrical equipment;

[0027] 5. Tube well; 51. Wire passage cavity; 52. Wire passage opening;

[0028] 6. Water retaining part; 61. Rainproof shutter;

[0029] 7. Waterproof eaves; 71. First eaves; 72. Second eaves;

[0030] 73. Connecting part; 731. First angle steel; 732. Steel beam;

[0031] 74. Support portion; 741. First square tube; 742. Second square tube;

[0032] 75. Accommodation cavity;

[0033] 76. Second angle steel;

[0034] 77. Second sealant;

[0035] 78. Third angle steel;

[0036] 79. Third sealant;

[0037] 7a, U-shaped channel steel;

[0038] 7b, fourth sealant;

[0039] 8. Drainage ditch;

[0040] 9. Expansion joints;

[0041] 10. Waterstop;

[0042] 11. First sealant;

[0043] 12. Foam filling board;

[0044] 13. Fire barrier;

[0045] 14. Drainage trough;

[0046] 15. Drying section; 151. Drying fan;

[0047] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0048] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0049] In the description of the present invention, the terms "upper," "lower," "left," "right," "front," "back," "inner," "outer," "lateral," and "longitudinal" to indicate directions or positions are based on the directions or positions shown in the accompanying drawings. These terms are used solely to facilitate the description of the present invention and to simplify the description. They are not intended to limit the devices, elements, or components indicated to having a specific direction, or to be constructed or operated in a specific direction. Therefore, they should not be construed as limitations on the present invention. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0050] In the description of the present invention, the terms "provided with," "disposed," "connected," and "placed" should be interpreted broadly. For example, they may refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0051] Furthermore, the terms "first," "second," and the like are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0052] The technical solution of the present invention is further described below with reference to the embodiments and drawings.

[0053] like Figure 1-2 As shown, an embodiment of the present invention provides a pipeline transition waterproofing and drainage structure for an existing building. The existing building includes a first building unit 1 and a second building unit 2 spaced apart in a horizontal direction. A curtain wall 3 is provided on the end surface of the first building unit 1 close to the second building unit 2. Electromechanical equipment 4 is installed on the top surface of the second building unit 2. The pipelines of the electromechanical equipment 4 pass through the curtain wall 3 and enter the interior of the first building unit 1. The pipeline transition waterproofing and drainage structure for the existing building includes:

[0054] The pipe well 5 is provided on the top surface of the second building unit 2. The pipe well 5 is located between the electromechanical equipment 4 and the curtain wall 3. There is a deformation joint 9 between the pipe well 5 and the curtain wall 3. The interior of the pipe well 5 has a wire cavity 51. The pipe well 5 is provided with a wire opening 52 connected to the wire cavity 51. The pipelines of the electromechanical equipment 4 pass through the wire opening 52 and the wire cavity 51 in sequence, pass through the top surface of the second building unit 2, pass through the deformation joint 9, pass through the curtain wall 3, and enter the interior of the first building unit 1. The wire opening 52 is provided with a water retaining portion 6 to prevent rainwater from entering the wire cavity 51.

[0055] The waterproof overhanging eaves 7 are arranged on the curtain wall 3 . When viewed in the vertical direction, the waterproof overhanging eaves 7 can cover the deformation joint 9 .

[0056] Based on the above technical solution, by arranging a waterproof eaves 7 on the curtain wall 3 that can cover the expansion joint 9, rainwater flowing down along the facade of the curtain wall 3 or falling directly can be intercepted at the source to prevent it from directly eroding and invading the expansion joint 9 and the pipelines passing through the area, thereby transforming the traditional passive blocking into active shielding protection; by arranging a pipe well 5, a centralized and protected internal wire cavity 51 is provided for multiple pipelines that need to cross the expansion joint 9, which not only makes the originally messy pipeline arrangement regular and orderly, but more importantly, isolates the pipeline from the harsh external environment. The water retaining part 6 provided at the wire mouth 52 further prevents ground rainwater from entering the wire cavity 51, providing a second layer of protection for the pipeline.

[0057] Preferably, a drainage ditch 8 is provided between the electromechanical equipment 4 and the pipe shaft 5 , the top surface of the waterproof eaves 7 has a first drainage slope toward the pipe shaft 5 , and the pipe shaft 5 has a second drainage slope toward the drainage ditch 8 .

[0058] The first drainage slope is from the waterproof eaves 7 to the top surface of the pipe well 5, ensuring that rainwater flowing down from the facade of the curtain wall 3 or directly falling on the waterproof eaves 7 is actively and directionally guided to the top surface of the pipe well 5; the second drainage slope is from the top surface of the pipe well 5 to the drainage ditch 8, ensuring that the rainwater received by the top surface of the pipe well 5 from the waterproof eaves 7 and the rainwater directly falling on itself can be quickly and secondary guided to the drainage ditch 8. The synergistic effect of the two slopes avoids the possibility of water accumulation on the top surfaces of the two waterproof components, the waterproof eaves 7 and the pipe well 5. Through rapid drainage, the hydrostatic pressure is greatly reduced, thereby significantly reducing the risk of leakage.

[0059] Preferably, the existing building pipeline transition drainage structure also includes a waterstop 10, and a first sealant 11 is connected between the top surface of the pipe shaft 5 and the bottom surface of the waterproof eaves 7. One end of the waterstop 10 is arranged on the waterproof eaves 7, and the other end of the waterstop 10 is adhered to the upper end of the pipe shaft 5 through the first sealant 11.

[0060] The first sealant 11 is filled between the top surface of the pipe shaft 5 and the waterproof eaves 7 to form a continuous and dense surface waterproof layer, which can prevent water vapor from invading the deformation joint 9. This is the first line of defense; the waterstop 10 serves as a wider and more reliable physical barrier, with its two ends respectively set on the waterproof eaves 7 and at the connection between the first sealant 11 and the upper end surface of the pipe shaft 5. This is the second line of defense. Even if the first sealant 11 is partially damaged after long-term use due to aging, extreme displacement between the first building unit 1 and the second building unit 2, or construction defects, any water attempting to infiltrate will be intercepted by the waterstop 10 as long as the first sealant 11 still has partial adhesion ability.

[0061] In another embodiment, the waterproof eaves 7 can be detachably installed on the curtain wall 3 .

[0062] Specifically, the waterproof eaves 7 includes a first eaves body 71, a second eaves body 72, two connecting parts 73, and a supporting part 74. The two connecting parts 73 are respectively arranged at the two ends of the curtain wall 3 in the first direction X, and the two ends of the supporting part 74 in the first direction X are respectively connected to the two connecting parts 73. The first eaves body 71 and the second eaves body 72 can be detachably installed on the supporting part 74. The first eaves body 71, the second eaves body 72 and the facade of the curtain wall 3 together enclose a receiving cavity 75 for accommodating the supporting part 74.

[0063] More specifically, the connecting portion 73 includes a first angle steel 731 and a steel beam 732. One side wall of the first angle steel 731 is fixed to the end of the curtain wall 3 in the first direction X by bolts. The steel beam 732 is welded to the other end face of the first angle steel 731. The steel beam 732 extends toward the second building unit 2. The supporting portion 74 includes a first square tube 741 and a second room tube. The first square tube 741 and the second square tube 742 are arranged at intervals along the second direction Y. The first square tube 741 and the second square tube 742 are both Extending along the first direction X, the first square tube 741 is disposed near the curtain wall 3. The ends of the first square tube 741 and the second square tube 742 are respectively welded to the steel beams 732 of the two connecting portions 73. The first square tube 741 and the second square tube 742 are both accommodated in the accommodating cavity 75. When viewed along the first direction X, the first eaves 71 is L-shaped. The second eaves 72 is mounted below the support portion 74. The first eaves 71 covers the upper surface of the support portion 74 and the end surface of the support portion 74 in the second direction Y.

[0064] The end surface of the first eaves 71 near the curtain wall 3 is connected to the first square tube 741 via a second angle steel 76 and bolts. A second sealant 77 is filled between the end surface of the first eaves 71 near the curtain wall 3 and the curtain wall 3. The second sealant 77 covers the heads of the bolts of the second angle steel 76. The end surface of the second eaves 72 near the curtain wall 3 is connected to the first square tube 741 via a third angle steel 78 and bolts. A third sealant 79 is filled between the end surface of the second eaves 72 near the curtain wall 3 and the curtain wall 3. The third sealant 79 covers the heads of the bolts of the third angle steel 78.

[0065] The end face of the second eaves 72 facing away from the curtain wall 3 and the other end of the L-shaped first eaves 71 are connected to the two side walls of the U-shaped channel steel 7a by bolts. The bottom wall of the U-shaped channel steel 7a is connected to the second square tube 742 by bolts. The fourth sealant 7b is filled between the end face of the second eaves 72 facing away from the curtain wall 3 and the other end of the L-shaped first eaves 71.

[0066] The first direction X and the second direction Y are perpendicular to each other.

[0067] The connecting portion 73 (comprising a first angle steel 731 and a steel beam 732) and the supporting portion 74 (comprising a first square tube 741 and a second square tube 742) form a stable load-bearing framework. The first and second eaves 71 and 72, serving as exterior panels, are detachably mounted to the load-bearing framework using connectors such as a second angle steel 76 and a third angle steel 78, U-shaped channel steel 7a, and bolts. When the first eaves 71 or the second eaves 72 is damaged for some reason, there is no need to perform any destructive operations on the load-bearing frame. It is only necessary to remove the corresponding fasteners and connectors to achieve independent replacement of the outer covering panel, which simplifies the maintenance process and effectively reduces maintenance costs; the waterproof function between the waterproof eaves 7 and the curtain wall 3 is undertaken by the second sealant 77 and the third sealant 79. When these sealing materials have reached the end of their service life and need to be replaced, it is allowed to temporarily remove the first eaves 71 and the second eaves 72, thereby exposing the connection position between the eaves and the curtain wall 3, providing barrier-free working conditions for completely removing the aging sealing materials. The reversible disassembly and assembly process ensures the quality of maintenance, avoids waterproof risks caused by inconvenient maintenance, and thus effectively extends the service life of the waterproof eaves 7.

[0068] Preferably, the existing building pipeline transition waterproofing and drainage structure further includes a foam filling plate 12, which is arranged in the deformation joint 9, and the two sides of the foam filling plate 12 are respectively connected to the curtain wall 3 and the pipe shaft 5.

[0069] More preferably, a fire barrier strip 13 is provided at the lower end of the foam filling plate 12 .

[0070] The foam filling board 12 serves as the direct carrier of the fire barrier strip 13. The fire barrier strip 13 can be fixed flatly and continuously on the surface of the foam filling board 12, ensuring that the fire barrier strip 13 can be evenly heated and reliably expanded when a fire occurs, thereby tightly sealing the gaps caused by structural deformation or material combustion, and effectively preventing the spread of flames and high-temperature smoke.

[0071] More preferably, a drainage ditch 14 is provided between the curtain wall 3 and the second building unit 2 , and the drainage ditch 14 is located below the fire barrier 13 .

[0072] The drainage trough 14 is located below all upper waterproof structures (waterproof eaves 7, first sealant 11, and waterstop 10). Its function is to intercept and collect any trace water that may penetrate the upper waterproof structure due to material aging, extreme weather or construction defects, thereby eliminating potential leakage risks and improving the long-term reliability and ultimate tolerance of the entire drainage structure.

[0073] It effectively isolates and protects the fire blocking system, ensuring its long-term performance stability. The fire resistance of the fire barrier strip 13 has high requirements for the dryness of its working environment. The drainage groove 14 is set below the fire barrier strip 13 to block trace water vapor from below, which will not infiltrate or permanently damage the fire barrier strip 13. The fire barrier strip 13 is physically isolated and protected in all directions, effectively preventing the performance degradation of the fireproof material due to moisture (such as expansion failure and material degradation), thereby ensuring that the fireproof structure can play its preset blocking function after the drainage groove 14 is burned in the event of a fire, solving the technical hidden danger of fireproof structure failure due to water vapor erosion.

[0074] More preferably, the drainage groove 14 has a third drainage slope.

[0075] Specifically, the third drainage slope is 1%-2%.

[0076] Preferably, the water retaining portion 6 includes a rainproof louver 61 provided at the wire opening 52 .

[0077] The rainproof shutter 61 has an inclined blade structure. Raindrops caught by the blades will be guided to the outside of the shutter along the inclined direction and discharged to the drain ditch 8, thereby reliably preventing rainwater from directly splashing or pouring into the wire cavity 51 of the pipe well 5. The rainproof shutter 61 constitutes an active defense barrier, which solves the problem of rainwater directly invading the pipe well 5 under severe weather conditions from the source, and provides direct waterproof protection for the pipelines entering the wire cavity 51. Moreover, the rainproof shutter 61 can effectively prevent larger foreign objects, such as leaves, garbage, birds or small animals, from entering the wire cavity 51, avoiding foreign objects from damaging the pipeline or causing dangers such as short circuits.

[0078] Preferably, a drying portion 15 is further provided on the wire passing opening 52 , and the drying portion 15 is arranged on the inner side of the water retaining portion 6 .

[0079] More preferably, the drying section 15 includes a drying fan.

[0080] The drying section 15 is disposed inside the water retaining portion 6 and is capable of processing any trace amounts of water mist, moisture, or splashing water droplets that may penetrate the water retaining portion 6. In addition to passive water retaining, an active environmental control measure is added, thereby providing a more reliable dry environment for the wire passage cavity 51, effectively preventing various malfunction risks caused by moisture.

[0081] In summary, the embodiment of the present invention provides a transition waterproof drainage structure for pipelines in existing buildings, which realizes source shielding and active protection: by providing a waterproof eaves 7 on the curtain wall 3 that can cover the deformation joint 9, rainwater flowing down along the facade of the curtain wall 3 or falling directly can be intercepted from the source to prevent it from directly eroding and invading the deformation joint 9 and the pipelines passing through the area, thus transforming the traditional passive blocking into active shielding and protection; it provides centralized storage and orderly transition: by providing a pipe well 5, a centralized and protected internal wire cavity 51 is provided for multiple pipelines that need to cross the deformation joint 9. This not only makes the originally messy pipeline layout regular and orderly, but more importantly, it isolates the pipeline from the harsh external environment. The water retaining portion 6 provided at the wire port 52 further prevents rainwater from the ground from entering the wire cavity 51, providing a second layer of protection for the pipeline.

[0082] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A pipeline transition waterproofing and drainage structure for an existing building, wherein the existing building comprises a first building unit (1) and a second building unit (2) spaced apart in a horizontal direction, wherein a curtain wall (3) is provided on the end face of the first building unit (1) close to the second building unit (2), and electromechanical equipment (4) is installed on the top face of the second building unit (2), and pipelines of the electromechanical equipment (4) pass through the curtain wall (3) and enter the interior of the first building unit (1), characterized in that: include: A pipe well (5), the pipe well (5) being arranged on the top surface of the second building unit (2), the pipe well (5) being located between the electromechanical equipment (4) and the curtain wall (3), a deformation joint (9) being provided between the pipe well (5) and the curtain wall (3), the interior of the pipe well (5) being provided with a wire passage cavity (51), the pipe well (5) being provided with a wire passage opening (52) connected to the wire passage cavity (51), the pipeline of the electromechanical equipment (4) sequentially passing through the wire passage opening (52), the wire passage cavity (51), passing through the top surface of the second building unit (2), passing through the deformation joint (9), passing through the curtain wall (3), and then entering the interior of the first building unit (1), the wire passage opening (52) being provided with a water retaining portion (6) which can prevent rainwater from entering the wire passage cavity (51); A waterproof overhanging eave (7) is provided on the curtain wall (3); when viewed in a vertical direction, the waterproof overhanging eave (7) can cover the deformation joint (9).

2. The existing building pipeline transition waterproofing and drainage structure according to claim 1 is characterized in that: A drainage ditch (8) is provided between the electromechanical equipment (4) and the pipe well (5); the top surface of the waterproof overhanging eaves (7) has a first drainage slope toward the pipe well (5); and the pipe well (5) has a second drainage slope toward the drainage ditch (8).

3. The existing building pipeline transition waterproofing and drainage structure according to claim 1, characterized in that: It also includes a water stop (10), a first sealant (11) is connected between the top surface of the pipe well (5) and the bottom surface of the waterproof eaves (7), one end of the water stop (10) is arranged on the waterproof eaves (7), and the other end of the water stop (10) is attached to the upper end of the pipe well (5) through the first sealant (11).

4. The existing building pipeline transition waterproofing and drainage structure according to claim 1, characterized in that: It also includes a foam filling plate (12), which is arranged in the deformation joint (9), and the two sides of the foam filling plate (12) are respectively connected to the curtain wall (3) and the pipe well (5).

5. The existing building pipeline transition waterproofing and drainage structure according to claim 4, characterized in that: A fire-blocking strip (13) is provided at the lower end of the foam-filled plate (12).

6. The existing building pipeline transition waterproofing and drainage structure according to claim 5, characterized in that: A drainage trough (14) is provided between the curtain wall (3) and the second building unit (2), and the drainage trough (14) is located below the fire barrier (13).

7. The existing building pipeline transition waterproofing and drainage structure according to claim 6, characterized in that: The drainage trough (14) has a third drainage slope.

8. The existing building pipeline transition waterproofing and drainage structure according to claim 1, characterized in that: The water retaining portion (6) includes a rainproof louver (61) provided at the wire-passing opening (52).

9. The existing building pipeline transition waterproofing and drainage structure according to claim 1, characterized in that: The wire passing port (52) is further provided with a drying portion (15), and the drying portion (15) is arranged on the inner side of the water retaining portion (6).

10. The existing building pipeline transition waterproofing and drainage structure according to claim 9, characterized in that: The drying section (15) includes a drying fan (151).

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