Multi-layer prefabricated cabin unit module abutted seam waterproof structure

By employing a labyrinthine waterproof loop structure consisting of a waterproof top cover, a first waterproof shell, and a flow-guiding shell at the joints of prefabricated module units, the problems of large on-site workload and poor waterproofing effect in existing technologies are solved, achieving a highly efficient joint waterproofing effect.

CN223540080UActive Publication Date: 2025-11-11SHANGHAI SIEYUAN TRANSMISSION & DIST ENG CO LTD +1
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Patent Information

Application Number
CN202422859557.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-22
Publication Date
2025-11-11
Estimated Expiration
2034-11-22

AI Technical Summary

Technical Problem

The existing waterproofing methods for prefabricated modular unit joints have problems such as large on-site workload, damage to anti-corrosion paint and safety hazards, and insufficient effective period of waterproofing adhesive.

Method used

The multi-layer prefabricated modular waterproof structure is adopted, including a waterproof top cover, a first waterproof shell, a first blocking entity, and a flow guiding shell. A labyrinth waterproof circuit is formed by riveting to prevent external water from entering the joint and to guide external water through the flow guiding channel, thus avoiding the need for full welding and the use of waterproof adhesive.

Benefits of technology

It significantly reduced on-site workload, protected the anti-corrosion paint on the outer surface of the prefabricated module, avoided the need for glue application, and achieved effective waterproofing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the field of prefabricated cabins, and discloses a waterproof structure for a multi-layer prefabricated cabin unit module abutted seam, which avoids water resistance in a full welding mode or a waterproof glue mode, thereby greatly reducing field workload, protecting anti-corrosion paint on the outer surface of a prefabricated cabin unit module and avoiding glue repair operation after the prefabricated cabin is installed at one time. Comprising a first waterproof shell, a first blocking entity and a flow guide shell, the first waterproof shell covers the first abutted seam, a first shell seam is formed by the edge of the first waterproof shell and the side face of the prefabricated cabin unit module, and the first blocking entity is arranged in the first waterproof shell; the first blocking entity is arranged between the first shell gap and the first abutted seam in a blocking mode, the flow guide shell is arranged on the step kicking face of the exposed step face in a blocking mode in the vertical direction and located over the second abutted seam, a flow guide channel is formed in the flow guide shell, the flow guide channel and the second abutted seam extend in the same direction, and the flow guide channel is open outwards. And the first blocking entity extends into the flow guide channel.
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Description

Technical Field

[0001] This utility model belongs to the field of prefabricated cabins, specifically relating to a waterproof structure for the splicing of multi-layer prefabricated cabin unit modules. Background Technology

[0002] Prefabricated modules are outdoor intelligent substations issued by the national power industry based on the core concept of "standard power distribution type". To facilitate transportation and storage, prefabricated modules are made in the form of multiple unit modules. When they need to be installed at a predetermined location, the unit modules are transported to the site in multiple trips by transport vehicles, and the unit modules of multiple prefabricated modules are connected and installed on site to form the entire prefabricated module.

[0003] The prefabricated module is rectangular and fully coated with anti-corrosion paint, such as... Figure 1 As shown, during storage, multiple prefabricated cabin unit modules are stacked in a planar matrix layer. When there are many prefabricated cabin unit modules, they are stacked in multiple layers from smallest to largest, with fewer modules on the upper layer than on the lower layer. This creates an exposed stepped surface exposed to the environment. To prevent water damage, a waterproof cap is laid on the top of each layer of prefabricated cabin unit modules, i.e., on the horizontal part of the exposed stepped surface. As a result, the joints between adjacent prefabricated cabin unit modules on the upper layer and the joints formed by the waterproof caps on the top of the prefabricated cabin unit modules on the lower layer at the step edge of the exposed stepped surface intersect, forming a "T"-shaped exposed joint. Currently, the method of waterproofing this exposed joint is full welding or applying waterproof adhesive. Here, waterproofing mainly refers to preventing rainwater infiltration.

[0004] However, the above-mentioned waterproofing methods have the following drawbacks: when using full welding, it results in a large amount of on-site work and causes some damage to the anti-corrosion paint on the outer surface of the prefabricated module, and there are unavoidable safety hazards associated with hot work on site; when using waterproof sealant, the effective period of the sealant is much shorter than the expected storage or use period of the prefabricated module, so multiple applications of sealant are required, otherwise the relevant construction standards cannot be met. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a waterproof structure for the seams of multi-layer prefabricated cabin unit modules, avoiding the need for full welding or waterproofing with waterproof adhesive. This significantly reduces on-site workload, protects the anti-corrosion paint on the outer surface of the prefabricated cabin unit modules, and eliminates the need for additional adhesive application after the prefabricated cabin is installed once.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A multi-layer prefabricated cabin unit module joint waterproof structure includes a waterproof top cover. The prefabricated cabin unit modules are rectangular, and multiple prefabricated cabin unit modules arranged in a planar matrix form a single-layer structure. The number of prefabricated cabin units in the upper layer is less than that in the lower layer. Adjacent upper and lower prefabricated cabin unit modules form exposed stepped surfaces. The waterproof top cover is placed on the stepped treads of the exposed stepped surfaces. Adjacent prefabricated cabin unit modules in the same layer form a first joint on the stepped risers of the exposed stepped surfaces, and the stepped gaps on the exposed stepped surfaces are second joints. The structure is characterized by further including: a first waterproof shell, covering the structure vertically. Located outside the first joint, the edge of the first waterproof shell and the side of the prefabricated cabin unit module form a first shell gap, the first shell gap extends vertically, the first blocking entity is located inside the first waterproof shell and directly above the first joint, the first blocking entity blocks the first shell gap and the first joint, the flow guiding shell blocks the exposed step surface of the step riser in the vertical direction and is located near the second joint, the flow guiding shell has a flow guiding channel inside, the flow guiding channel extends in the same direction as the second joint and opens to the outside, the first blocking entity extends into the flow guiding channel.

[0008] Preferably, the present invention further includes a first blocking groove plate, which is U-shaped. The first blocking entity is the bottom surface of the first blocking groove plate. There are two first blocking groove plates, which are symmetrically arranged on both sides of the first joint, and the two grooves face away from each other. The first waterproof shell is a U-shaped groove plate with the groove facing the first joint.

[0009] Furthermore, the present invention also includes a second blocking entity, wherein the flow channel has a raised sidewall located outside the stepped kick surface of the exposed stepped surface, and the second blocking entity is disposed on the top of the raised sidewall.

[0010] Furthermore, the present invention also includes a second blocking groove plate, which is in the shape of an inverted U. The second blocking entity is the bottom surface of the second blocking groove plate. The top of the raised side wall is a free side end that is bent at a right angle towards the inside of the guide channel. The second blocking groove plate is covered on the free side end, and the bottom surface of the second blocking groove plate is in contact with the free side end.

[0011] Furthermore, the bottom end of the first blocking trough plate is attached to the bottom surface of the guide channel. The bottom end of the first blocking trough plate is bent twice to form a continuous first water-blocking trough section and a second water-blocking trough section. The first water-blocking trough section bends and extends along the bottom surface of the guide channel toward the raised side wall, and the second water-blocking trough section extends upward along the raised side wall. The bottom surfaces of the U-shaped grooves of the first water-blocking trough section and the second water-blocking trough section are perpendicular to the bottom surface of the guide channel and the raised side wall, respectively, and the second water-blocking trough section is closed and connected to the free end of the side through the end.

[0012] Furthermore, the present invention also includes a second waterproof shell located inside the first waterproof shell, with a portion of the first blocking groove plate located inside the flow channel serving as the channel inner groove. The second waterproof shell covers the opening of the U-groove in the channel inner groove, and a flow opening is formed between the bottom edge of the second waterproof shell and the bottom surface of the flow channel.

[0013] Furthermore, this utility model also includes a top plate extension plate, which is set at the end of the waterproof top cover on the side facing the upper prefabricated cabin unit module. It is U-shaped, and the top plate extension plate extends vertically upward. The top of the top plate extension plate is a free end of the top plate that bends at a right angle toward the waterproof top cover. The extension directions of the top free end and the side free end are opposite, and the bottom surface of the second blocking groove plate is in contact with both the side free end and the top free end.

[0014] Furthermore, the waterproof roof has a drainage channel located near the top plate extension plate, the drainage channel extending in the same direction as the second joint and opening outwards, and the opening of the second blocking plate facing the bottom surface of the drainage channel.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. Because the multi-layer prefabricated cabin unit module joint waterproof structure of this utility model includes a first waterproof shell, a first blocking entity, and a flow guiding shell, the first waterproof shell covers the outside of the first joint, the edge of the first waterproof shell and the side of the prefabricated cabin unit module form a first shell gap, the first blocking entity is disposed inside the first waterproof shell, the first blocking entity is disposed between the first shell gap and the first joint, the flow guiding shell is disposed on the exposed stepped surface of the step in the vertical direction and is located directly above the second joint, the flow guiding shell has a flow guiding channel formed inside, the flow guiding channel extends in the same direction as the second joint and opens to the outside, the first blocking entity... By extending into the flow channel, the first and second seams form a "T"-shaped exposed seam. The first waterproof shell and the first blocking entity prevent external water from entering the first seam, and the flow-guiding shell prevents external water from entering the second seam. The flow-guiding channel guides the water falling along the first blocking entity to the outside, thus forming an overall waterproof effect on the "T"-shaped exposed seam. Furthermore, all of the above-mentioned connection structures can be completed by riveting. Therefore, this utility model avoids the need for full welding or waterproofing with waterproof adhesive, thereby significantly reducing on-site workload, protecting the anti-corrosion paint on the outer surface of the prefabricated cabin unit module, and eliminating the need for additional adhesive application after the prefabricated cabin is installed once.

[0017] 2. Because this utility model also includes a first blocking groove plate, which is U-shaped, and the first blocking entity is the bottom surface of the first blocking groove plate, there are two first blocking groove plates. The two first blocking groove plates are symmetrically arranged on both sides of the first joint, and the two groove openings face away from each other. The first waterproof shell is a U-shaped groove plate, and the groove opening faces the first joint. Therefore, the first joint of this utility model is located between the two first blocking groove plates, so that the first waterproof shell and the two first blocking groove plates form a waterproof labyrinth loop.

[0018] 3. Because this utility model also includes a second blocking groove plate, which is inverted U-shaped, the second blocking entity is the bottom surface of the second blocking groove plate, and the top of the raised side wall is a free end of the side that is bent at a right angle towards the inside of the guide channel. The second blocking groove plate is covered on the free end of the side, and the bottom surface of the second blocking groove plate is in contact with the free end of the side. Therefore, this utility model avoids water ingress between the waterproof top cover and the second blocking plate by covering the top of the raised side wall with the second blocking groove plate.

[0019] 4. Because the bottom end of the first blocking groove plate of this utility model is attached to the bottom surface of the guide channel, the bottom end of the first blocking groove plate forms a continuous first water-blocking groove segment and a second water-blocking groove segment through two bends. The first water-blocking groove segment bends and extends along the bottom surface of the guide channel toward the raised side wall, and the second water-blocking groove segment extends upward along the raised side wall. The bottom surfaces of the U-shaped grooves of the first water-blocking groove segment and the second water-blocking groove segment are perpendicular to the bottom surface of the guide channel and the raised side wall, respectively. The second water-blocking groove segment is closed and connected to the free end of the side through its end. Therefore, this utility model avoids water leakage from the first blocking groove plate by setting the first water-blocking groove segment and the second water-blocking groove segment, and avoids water entering the first joint from between the two first blocking groove plates by closing and connecting the end of the second water-blocking groove segment to the free end of the side.

[0020] 5. Because this utility model also includes a second waterproof shell, located inside the first waterproof shell, and uses a portion of the first blocking groove plate located inside the flow channel as the channel inner groove, the second waterproof shell covers the opening of the U-groove in the channel inner groove, and a flow opening is formed between the bottom edge of the second waterproof shell and the bottom surface of the flow channel, this utility model prevents the risk of water leakage from the first blocking groove plate by blocking the opening of the first blocking groove plate of the second waterproof shell, and the flow opening allows water to flow smoothly out of the flow channel. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the stacking of multi-layer prefabricated cabin unit modules according to an embodiment of the present invention;

[0022] Figure 2This is a schematic diagram showing the cooperation of the first waterproof shell, the first blocking groove plate, the flow guiding shell, and the top extension plate of the multi-layer prefabricated cabin unit module splicing waterproof structure according to an embodiment of the present utility model (the second blocking groove plate is not shown).

[0023] Figure 3 This is a schematic diagram showing the cooperation between the first waterproof shell and the first blocking groove plate in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the cooperation between the flow guide shell and the first blocking groove plate in an embodiment of the present invention (the second blocking groove plate is not shown);

[0025] Figure 5 This is a perspective view of the second waterproof shell according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram showing the cooperation of the first blocking groove plate, the flow guiding shell, and the second waterproof shell in an embodiment of the present invention (the second blocking groove plate is not shown).

[0027] Figure 7 for Figure 6 A schematic diagram of the engagement of the second blocking groove plate.

[0028] In the diagram: M, prefabricated cabin unit module; L1, first joint; L2, second joint; S1, step riser; S2, step tread; G, waterproof top cover; 1, first waterproof shell; 2, first blocking groove plate; 2a, first blocking entity; 21, channel inner groove; 22a, first water-proof groove section; 22b, second water-proof groove section; 3, flow guide shell; 3a, flow guide channel; 31, raised side wall; 31a, side free end; 4, second blocking groove plate; 4a, second blocking entity; 5, second waterproof shell; 5a, flow opening; 6, top plate extension plate; 6a, top plate free end; 6b, drainage channel. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate the waterproof structure of the multi-layer prefabricated cabin unit module splicing of this utility model. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0030] The multi-layer prefabricated cabin unit module joint waterproof structure in this embodiment includes a waterproof top cover G. The prefabricated cabin unit module M is rectangular. Multiple prefabricated cabin unit modules M arranged in a planar matrix form a single-layer structure, and the number of prefabricated cabin units on the upper layer is less than that on the lower layer. Adjacent upper and lower prefabricated cabin unit modules form exposed step surfaces. The waterproof top cover G covers the step tread S2 of the exposed step surface. Adjacent prefabricated cabin unit modules M on the same layer form a first joint L1 on the step kick surface S1 of the exposed step surface. The step gap of the exposed step surface is the second joint L2. Specifically, the top surface of the prefabricated cabin unit module M corresponding to the extended length of the lower layer prefabricated cabin unit module M compared to the adjacent upper layer prefabricated cabin unit module M is the step tread S2. The waterproof top cover G covers the prefabricated cabin unit module M involved in the step tread. The first joint L1 is vertical, the second joint L2 is horizontal, and the first joint L1 and the second joint L2 intersect in a "T" shape.

[0031] like Figure 2 As shown, the multi-layer prefabricated cabin unit module joint waterproof structure includes a first waterproof shell 1, a first blocking groove plate 2, a flow guiding shell 3, a second blocking groove plate 4, a second waterproof shell 5, and a top plate extension plate 6.

[0032] like Figure 3 As shown, the first waterproof shell 1 is vertically covered outside the first joint L1. The first waterproof shell 1 is a U-shaped groove plate with the groove facing the first joint L1. Thus, the edges of the two sides of the first waterproof shell 1 and the side of the prefabricated cabin unit module M, i.e. the step kick surface S1, form two vertically extending first shell gaps (not shown in the figure).

[0033] Two first blocking groove plates 2 are disposed inside the first waterproof shell 1 and are U-shaped. The two first blocking groove plates 2 are symmetrically disposed on both sides of the first joint L1, and the two grooves face away from each other. The bottom surface of the first blocking groove plate 2 is used as the first blocking entity 2a. Thus, the two first blocking entities 2a are located near the two sides of the first joint L1, and the first blocking entities 2a are blocked between the gap in the first shell and the first joint L1. Water entering from the gap in the first shell will be blocked on the surface of the first blocking entity 2a. Specifically, there is a gap between the first waterproof shell 1 and the two first blocking groove plates 2, thereby forming a maze waterproof circuit.

[0034] like Figure 4 As shown, the flow guide housing 4 is positioned on the exposed step surface S1 of the step surface that blocks the second joint L2 in the vertical direction, and is located directly above the second joint L2. The flow guide housing 4 has a flow guide channel (not shown in the figure) inside. The flow guide channel 4 extends in the same direction as the second joint L2 and opens to the outside. The first blocking groove plate 2 extends into the flow guide channel, and the first blocking entity 2a is perpendicular to the inner wall of the flow guide channel 4.

[0035] The flow channel has a raised sidewall 31 located outside the stepped kick surface S1 of the exposed stepped surface, and the top of the raised sidewall 31 is a free side end 31a that bends at a right angle toward the inside of the flow channel. Specifically, the flow guide shell 4 is a solid formed by "L"-shaped sheet metal layout, with a horizontal plate part connected to the stepped kick surface S1 and a vertical plate part, and the vertical plate part is the raised sidewall 31. The free side end 31a is a right angle folded edge of the raised sidewall 31, and the free side end 31a is parallel to the horizontal plate part. In this embodiment, the prefabricated cabin unit module M is reserved with a fixed stepped surface, and the horizontal plate part is fixed on the fixed stepped surface.

[0036] The bottom end of the first blocking groove plate 2 is attached to the inner wall of the guide channel, namely the horizontal plate part and the vertical plate part, and the part of the first blocking groove plate 2 located in the guide channel is used as the inner groove part 21 of the channel.

[0037] The bottom end of the channel inner groove 21 forms a continuous first water-blocking groove segment 22a and a second water-blocking groove segment 22b by bending twice along the horizontal plate and vertical plate of the guide channel. That is, the first water-blocking groove segment 22a extends along the horizontal plate, that is, the bottom surface of the guide channel, towards the raised side wall 31 at a right angle. The second water-blocking groove segment 22b extends upward along the raised side wall 31. The bottom surface of the U-shaped groove of the first water-blocking groove segment 22a and the second water-blocking groove segment 22b is perpendicular to the bottom surface of the guide channel and the raised side wall 31, respectively. The second water-blocking groove segment 22b is closed and connected to the side free end 31a through its end.

[0038] like Figures 5-7 As shown, the second blocking groove plate 4 is an inverted U-shape. The bottom surface of the second blocking groove plate 4 serves as the first blocking entity 4a. The second blocking groove plate 4 covers the free end 31a on the side, and the bottom surface of the second blocking groove plate 4 is in contact with the free end 31a on the side. That is, the second blocking entity 4a is blocked on the top of the raised side wall 31.

[0039] The second waterproof shell 5 is located inside the first waterproof shell 1. The second waterproof shell 5 covers the opening of the U-groove in the channel inner groove 21, and a flow opening 5a is formed between the bottom edge of the second waterproof shell 5 and the bottom surface of the guide channel. Specifically, the second waterproof shell 5 extends in a "U" shape, and the extension section is a "U" sheet metal structure. Thus, the "U" sheet metal structure can simultaneously close the opening of the U-groove in the channel inner groove 21 of the two first blocking side plates 2, thereby clamping the two first blocking side plates 2 in the extension direction of the second joint L2. The two sides of the second waterproof shell 5 are clamped and positioned by the guide shell 3. The inner wall of the first waterproof shell 1 is connected to the outer surface of the second waterproof shell 5, thereby positioning the first waterproof shell 1.

[0040] The top plate extension plate 6 is located at the end of the waterproof top cover G on the side facing the upper prefabricated cabin unit module M. It is U-shaped and extends vertically upward. The top of the top plate extension plate 6 is a free end 6a of the top plate that bends at a right angle towards the waterproof top cover G. The extension directions of the top free end 6a and the side free end 31a are opposite. The bottom surface of the second blocking groove plate 4 is in contact with both the side free end 31a and the top free end 6a.

[0041] The waterproof top cover G also has a drainage channel 6b located near the top plate extension plate 6. The drainage channel 6b extends in the same direction as the second joint L2 and opens outward. The opening of the second blocking plate 4 faces the bottom surface of the drainage channel 6b. Specifically, the top plate extension plate 6 and the waterproof top cover G have a step difference in the horizontal direction, thereby forming a stepped surface. The horizontal plate part of the flow guide shell 3 is placed on the stepped surface.

[0042] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent.

Claims

1. A multi-layer prefabricated cabin unit module joint waterproof structure, comprising a waterproof top cover, the prefabricated cabin unit modules being rectangular, multiple prefabricated cabin unit modules stacked in a planar matrix forming a single-layer structure, wherein the number of prefabricated cabin units in the upper layer is less than that in the lower layer, adjacent upper and lower prefabricated cabin unit modules forming exposed stepped surfaces, the waterproof top cover covering the stepped treads of the exposed stepped surfaces, adjacent prefabricated cabin unit modules in the same layer forming a first joint on the stepped treads of the exposed stepped surfaces, and the stepped gaps of the exposed stepped surfaces forming a second joint, characterized in that... Also includes: A first waterproof shell is vertically installed over the outside of the first joint. The edge of the first waterproof shell forms a first shell gap with the side of the prefabricated cabin unit module, and the first shell gap extends vertically. A first blocking entity is disposed inside the first waterproof shell and near the first seam. The first blocking entity blocks the gap between the first shell and the first seam. The flow guide housing is vertically positioned to block the exposed stepped surface of the step and is located directly above the second joint. The flow guide housing has a flow guide channel inside, which extends in the same direction as the second joint and opens to the outside. The first blocking entity extends into the flow guide channel.

2. The multi-layer prefabricated cabin unit module joint waterproof structure according to claim 1, characterized in that, Also includes: The first blocking groove plate is U-shaped, and the first blocking entity is the bottom surface of the first blocking groove plate. There are two first blocking groove plates, which are symmetrically arranged on both sides of the first joint, with the two groove openings facing away from each other. The first waterproof shell is a U-shaped groove plate, with the groove facing the first joint.

3. The multi-layer prefabricated cabin unit module joint waterproof structure according to claim 2, characterized in that, Also includes: Second blocking entity, The flow channel has a raised sidewall located outside the stepped surface of the exposed stepped surface, and the second blocking entity is disposed on the top of the raised sidewall.

4. The multi-layer prefabricated cabin unit module joint waterproof structure according to claim 3, characterized in that, Also includes: The second blocking groove plate is in the shape of an inverted U, and the second blocking entity is the bottom surface of the second blocking groove plate. The top of the raised sidewall is a free side end that bends at a right angle toward the inside of the guide channel. The second blocking groove plate is placed on the free side end, and the bottom surface of the second blocking groove plate is in contact with the free side end.

5. The waterproof structure for the joints of multi-layer prefabricated cabin unit modules according to claim 4, characterized in that: in, The bottom end of the first blocking groove plate is in contact with the bottom surface of the guide channel. The bottom end of the first blocking groove plate is bent twice to form a continuous first water-blocking groove segment and a second water-blocking groove segment. The first water-blocking trough section bends and extends along the bottom surface of the flow guide channel toward the raised side wall, and the second water-blocking trough section extends upward along the raised side wall. The bottom surfaces of the U-shaped grooves of the first water-blocking trough section and the second water-blocking trough section are perpendicular to the bottom surface of the flow guide channel and the raised side wall, respectively, and the second water-blocking trough section is closed and connected to the free end of the side through its end.

6. The waterproof structure for the joints of multi-layer prefabricated cabin unit modules according to claim 5, characterized in that, Also includes: The second waterproof shell is located inside the first waterproof shell. The portion of the first blocking groove plate located within the flow guiding channel is used as the channel inner groove. The second waterproof shell covers the opening of the U-groove in the channel inner groove, and a flow opening is formed between the bottom edge of the second waterproof shell and the bottom surface of the flow guiding channel.

7. The multi-layer prefabricated cabin unit module joint waterproof structure according to claim 5, characterized in that, Also includes: The top plate extension plate, located at the end of the waterproof top cover on the side facing the upper prefabricated cabin unit module, is U-shaped and extends vertically upwards. The top end of the top plate extension plate is a free end of the top plate that bends at a right angle toward the waterproof top cover, and the extension directions of the free end of the top plate and the free end of the side plate are opposite. Furthermore, the bottom surface of the second blocking groove plate is in close contact with both the free end of the side plate and the free end of the top plate.

8. The multi-layer prefabricated cabin unit module joint waterproof structure according to claim 7, characterized in that: in, The waterproof top cover has a drainage channel located near the top plate extension plate, the drainage channel extending in the same direction as the second joint and opening outward, and the opening of the second blocking plate facing the bottom surface of the drainage channel.