Transformer substation outer wall panel and construction method

Abstract

The invention belongs to the technical field of transformer substation building outer walls, and particularly relates to a transformer substation outer wall panel and a construction method. The diversion trenches are arranged at the bottom of each layer of keel frame, and the diversion trench at the bottommost layer is connected with a drainage pipe; the decorative integrated plate is fixed on the outer side of the keel frame; the diversion system comprises a vertical branch pipe, a vertical main pipe and a horizontal pipe which are pre-buried in the outer wall of the transformer substation; the water immersion sensor is installed at a drainage pipe opening and automatically gives an alarm when water flow passes through; and a liquid level control device. The U-shaped stainless steel diversion trench is formed in the bottom of each layer of vertical outer wall, and seepage water and condensate water formed on the wall surface can flow towards the drainage connector without hindrance after naturally converging into the trench body along the vertical wall body, so that equipment in the transformer substation is prevented from being affected with damp.

Description

Technical Field

[0001] This invention belongs to the field of substation building exterior wall technology, specifically relating to a substation exterior wall panel and its construction method. Background Technology

[0002] Currently, the main building of underground unmanned and manned substations typically consists of four underground levels and one above-ground level. The ±0.000 elevation is 44.750m relative to the absolute elevation, the base elevation is -23.70m, and the waterline is around -10m. Located below the surface, underground substations are at risk of moisture seeping into the underground substation interior, especially during seasons with heavy rainfall. Furthermore, due to the low temperature inside the substation, when hot outdoor air enters and encounters the cold walls, floor, or other surfaces, moisture in the air condenses into water droplets, forming condensate. In this environment of frequent wet and dry cycles, the base and surface layers of the walls are prone to peeling and flaking. The persistent presence of condensate, along with the preheating evaporation and subsequent condensation upon cooling, will cause varying degrees of corrosion to the equipment and electrical components within the underground substation over time.

[0003] Chinese invention patent CN113756618A discloses a modular substation building based on integrated fiber-reinforced composite panels, including a frame, wall panel modules, and channel modules. The wall panel modules, fixed to the frame, include an exterior wall decorative layer, a keel system, a base wall system, and an interior wall decorative layer arranged sequentially. The channel modules include main channel channels and branch channel channels, both arranged in a ring on the side of the wall panel modules. The branch channel channels contain prefabricated channels with several wiring layers and several prefabricated openings on the wall surface. This invention achieves waterproof sealing by using waterproof strips, but it cannot prevent condensation from forming, and the condensation will still corrode the equipment inside the substation. Summary of the Invention

[0004] The purpose of this invention is to provide a substation exterior wall panel and construction method to solve the problem in the prior art of condensation water causing wall peeling and corrosion of equipment in underground substations.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A wall panel for the exterior wall of a substation, comprising: Several layers of keel frame, with the inner side fixed to the outer wall of the corresponding floor of the substation; A flow channel is provided at the bottom of each layer of the keel frame, and the flow channel at the bottom layer is connected to a drain pipe; The decorative integrated panel is fixed to the outside of the keel frame; The diversion system includes vertical branch pipes, vertical main pipes, and horizontal pipes embedded in the outer wall of the substation. The vertical branch pipes, vertical main pipes, and horizontal pipes are fixedly connected and communicate with each other. The vertical branch pipes are connected to the diversion channels on each floor. A water immersion sensor is installed at the drain outlet and automatically alarms when water flows through it. The liquid level control device includes a liquid level sensor and a water pump installed in a sump. The liquid level sensor and the water pump are connected by a signal. When the water level exceeds the limit, an alarm is triggered and water is automatically drained. When the water level drops to the set lower limit, the water pump is automatically stopped.

[0006] Preferably, the keel frame is a grid skeleton made of C-shaped galvanized steel keel, and the skeleton is fixedly connected to the outer wall of the substation by expansion bolts. Preferably, the guide channel is a U-shaped channel.

[0007] Preferably, the guide channel has a depth of 100mm, a width of 50mm, and a bottom slope of 1%.

[0008] Preferably, the guide channel is fixed to the bottom of the light steel keel frame by welding, and the corners of the guide channel are integrally formed by laser cutting and bending.

[0009] Preferably, the decorative integrated panel is fixed to the light steel keel frame by self-tapping screws, and the spacing of the self-tapping screws is evenly distributed. Preferably, in the diversion system, water-stop rings are fitted on the outside of the vertical branch pipe, the vertical main pipe, and the horizontal pipe, and the connection nodes of the vertical branch pipe, the vertical main pipe, and the horizontal pipe are filled with sealant.

[0010] Preferably, it also includes a fireproof board, which is located between the keel frame and the decorative integrated panel.

[0011] On the other hand, the present invention provides a method for constructing the exterior wall of a substation, comprising the following specific steps: Vertical main pipes, horizontal pipes, and vertical branch pipes are pre-embedded inside the outer wall of the substation; A keel frame is fixed to the exterior wall of each substation floor; A flow guide channel with a slope of 1% is installed at the bottom of the keel frame. Connect a drain pipe at the bottommost guide channel and install a water immersion sensor at the drain pipe opening; The bottom horizontal pipe leads to the drainage ditch and eventually into the sump. Install the decorative integrated panel on the outside of the keel frame, seal it, and the construction is complete.

[0012] Preferably, in the step of installing the decorative integrated panel on the outside of the keel frame, a fireproof board is added between the decorative integrated panel and the keel frame.

[0013] The beneficial effects of this invention are as follows: This invention utilizes U-shaped stainless steel drainage channels installed at the bottom of each vertical exterior wall, coupled with a 1% slope directional drainage structure. Water seepage and condensation from the wall surface naturally flow into these channels along the vertical wall, then unimpeded towards the drainage inlet. From there, a complete channel is formed by vertical branch pipes, horizontal pipes, and the main pipe, all fully welded to the drainage channels, ultimately converging into a sump. When moisture is generated, a water immersion sensor at the vertical branch pipe inlet immediately captures the signal, simultaneously triggering an alarm and activating a level sensor in the sump. Once the water level reaches a set value, a water pump automatically starts to drain the water. The entire process requires no manual intervention to quickly remove moisture, structurally preventing water erosion of the wall base and avoiding peeling and flaking. It also completely prevents electrical equipment from short-circuiting or corroding due to prolonged dampness, providing direct protection for the substation's structural safety and stable equipment operation.

[0014] This invention overcomes the shortcomings of traditional technologies, such as the separation of drainage from the wall and limited functionality, through an integrated structural design. A light steel keel frame serves as the core supporting structure, using C-shaped galvanized steel and a grid layout to bear the wall load and provide a precise installation reference for the stainless steel drainage channel and integrated decorative panel. The drainage channel is welded to the bottom of the keel, and the integrated decorative panel is fixed to the keel surface with self-tapping screws. These three elements form an integrated structure for support, drainage, and decoration, eliminating the need for separate drainage pipes or decorative layers. Simultaneously, the pipes with water-stop rings and the polyurethane sealant filling process in the drainage system ensure a seamless connection between the drainage structure and the wall structure. This further enhances the anti-leakage effect while achieving drainage, moisture-proofing, and decorative functions, significantly simplifying the construction process, reducing the number of components and installation steps, and lowering construction complexity.

[0015] In this invention, the light steel keel, U-shaped stainless steel guide channel, and fiber-reinforced silicate decorative panel are all prefabricated components in the factory. On-site assembly only requires fixing the keel with expansion bolts, welding the guide channel, and bolting the decorative panel. The entire process eliminates wet work such as plastering and bricklaying, completely eliminating the impact of seasonal climate on construction. Construction can proceed normally even in low temperatures and rainy weather. Compared to traditional masonry walls and plastering processes, this structure has a simpler installation process and improves construction efficiency by more than 30%. Furthermore, the component connections utilize full welding, sealant filling, and self-tapping screw fixing, avoiding the joint cracking problem caused by mortar shrinkage in traditional wet work, significantly improving the stability of construction quality.

[0016] The U-shaped stainless steel drainage channel in this invention features a cross-sectional structure and slope design that enables active, directional drainage of water. The laser-cut, seamless corner design eliminates water accumulation dead zones, preventing mold growth and wall damage from the source. Compared to traditional cavity wall panels or PVC pipe drainage systems without directional drainage, this system offers more thorough moisture protection. In terms of materials, the anti-corrosion coating of the galvanized light steel keel and the rust-resistant properties of the stainless steel drainage channel, combined with a keel thickness of ≥0.6mm and a full-welded connection process, extend the system's service life by more than 10 years compared to PVC pipe drainage solutions. The integrated decorative panel uses fire-resistant material, ensuring a uniform and aesthetically pleasing interior wall finish and enhancing the wall's fire resistance through secure fixing to the keel, further improving the safety level of the substation.

[0017] In this invention, the water immersion sensor, liquid level sensor, and water pump in the drainage system are all independent components, connected to the pipes via wires within an integrated structure, without rigid fixation to the main structure such as decorative panels or keel. When maintenance is required, the sensor or water pump can be directly disassembled and replaced without damaging the decorative panels or wall frame, completely solving the problem of traditional technologies requiring wall demolition and pipe removal for maintenance. Simultaneously, the intelligent monitoring structure eliminates the need for manual on-site inspections, automatically alarming in case of abnormalities, significantly reducing maintenance manpower, lowering maintenance costs for decorative surface repair and wall damage repair, and significantly improving maintenance efficiency. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of a substation exterior wall panel according to Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of a substation exterior wall panel after construction according to Embodiment 1 of the present invention, with part of the exterior wall omitted; Figure 3 This is a schematic diagram of the structure of a substation exterior wall panel according to Embodiment 2 of the present invention; The components include: 1. Decorative integrated panel; 2. Fireproof board; 3. Expansion bolts; 4. Keel frame; 5. Exterior wall; 6. Drainage channel; 7. Vertical branch pipe; 8. Horizontal pipe; 9. Vertical main pipe; 10. Drainage pipe; 11. Water collection trough; 12. Collection pool; 13. Through hole. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0020] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0021] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. It should be noted in the description of this invention that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example 1 like Figures 1-2 As shown, a substation exterior wall panel includes: Several layers of keel frame 4 are fixed to the outer wall 5 of the corresponding layer of the substation on the inside, which is used to connect to the wall and provide an installation base for the subsequent diversion channel 6 and decorative integrated panel 1. At the same time, it reserves equipment installation space and constitutes the core support structure of the wall. The drainage channel 6 is set at the bottom of each layer of the keel frame 4. The bottommost drainage channel 6 is connected to the drain pipe 10, which is used to collect the seepage water and condensate water flowing from the wall and transport the water to the subsequent drain pipe 10 through gravity directional diversion. The decorative integrated panel 1 is fixed to the outside of the keel frame 4 to ensure that the interior wall decoration of the entire station is uniform and beautiful. The diversion system includes vertical branch pipes 7, vertical main pipes 9, and horizontal pipes 8 embedded in the outer wall 5 of the substation. The vertical branch pipes 7, vertical main pipes 9, and horizontal pipes 8 are fixedly connected and interconnected. The vertical branch pipes 7 are connected to the diversion channels 6 on each floor. Water-stop rings are fitted on the outside of the vertical branch pipes 7, vertical main pipes 9, and horizontal pipes 8. The connection nodes of the vertical branch pipes 7, vertical main pipes 9, and horizontal pipes 8 are filled with sealant to achieve a sealed connection of each drainage component, prevent water from leaking from the nodes, and at the same time construct a complete drainage channel to transport the water collected in the diversion channels 6 to the collection pit. A water immersion sensor is installed at the drain pipe inlet 10 and automatically alarms when water flows through it. The liquid level control device includes a liquid level sensor and a water pump installed in the sump. The liquid level sensor and the water pump are connected by a signal. When the water level exceeds the limit, an alarm is triggered and the water pump is automatically started to drain water. When the water level drops to the set lower limit, the water pump is automatically stopped.

[0024] As a preferred example of the above embodiments, the keel frame 4 is a grid skeleton made of C-shaped galvanized steel keel, and the skeleton is fixedly connected to the substation outer wall 5 by expansion bolts 3. As a preferred example of the above embodiment, the keel frame 4 includes top and bottom keels and vertical keels. The top and bottom keels are fixedly connected to the substation exterior wall 5 by expansion bolts 3, and the vertical keels are connected to the top and bottom keels by self-tapping screws to ensure the overall stability of the frame.

[0025] As a preferred example of the above embodiment, the guide channel 6 is a U-shaped channel with a depth of 100mm, a width of 50mm, and a 1% slope at the bottom.

[0026] As a preferred example of the above embodiments, the guide channel 6 is fixed to the bottom of the light steel keel frame 4 by welding, and the corner of the guide channel 6 is integrally formed by laser cutting and bending.

[0027] As a preferred example of the above embodiments, the decorative integrated panel 1 is fixed to the light steel keel frame 4 by self-tapping screws. The self-tapping screws are evenly distributed to ensure that the panel is firmly fixed and there is no risk of loosening.

[0028] As a preferred example of the above embodiments, in the diversion system, the vertical main pipe 9 is made of DN50 stainless steel pipe, the vertical branch pipe 7 is made of DN25 stainless steel pipe, and the horizontal pipe 8 is made of DN32 stainless steel pipe.

[0029] As a preferred example of the above embodiments, a water-stop ring is provided on the horizontal pipe 8.

[0030] As a preferred example of the above embodiments, a fireproof board 2 is also included, which is located between the keel frame 4 and the decorative integrated panel 1.

[0031] As a preferred example of the above embodiments, the fireproof board 2 is a fiber-reinforced silicate fireproof board 2.

[0032] As a preferred example of the above embodiment, it further includes a control module, a water seepage sensor, a temperature sensor, and a humidity sensor. A water seepage sensor is installed inside the guide channel 6 to monitor the actual water seepage volume of each layer of the guide channel 6 in real time. Q leak The water seepage sensor and control module are connected by a signal; a temperature sensor is installed between the keel frame 4 and the outer wall 5 to measure the wall surface temperature. T wall and ambient temperature T env The temperature sensor and control module are connected by a signal; a humidity sensor is installed at the top of each floor of the substation to monitor the ambient humidity. H env The humidity sensor and control module are connected by signals. Based on the collected seepage information, temperature, and humidity, a condensate prediction algorithm is used to predict the amount of condensate generated, and the control module controls the start and stop of the water pump.

[0033] Condensate prediction algorithms include: Calculate dew point temperature T dew : ; in, RH env Relative humidity; Determine the conditions for condensate formation Q cond : ; in, k The condensation coefficient, A wall The area of ​​a single-layer wall; Total water volume Q total predict: ; in, α As a historical correction factor, Q hist This represents historical water infiltration volume.

[0034] Based on the predicted total water volume, the control module controls the start and stop of the water pumps, specifically: When the predicted total water volume exceeds 70% of the sump volume, the water pump is started in advance, reducing the drainage response time from a passive 30 minutes to an active 5 minutes. A condensation risk warning will be issued when the ambient humidity is greater than 85% and the temperature difference between the wall surface and the ambient temperature is less than 2°C.

[0035] Drainage is suspended when the water level in the collection tank exceeds 80%, and recycled water is used preferentially. Working principle: Water seepage from the exterior walls of the underground substation or condensation of moisture in the air upon contact with the cold wall surface; Water seepage and condensation flow naturally down the wall and into the stainless steel drainage channel 6 at the bottom; The water in the diversion channel 6 is diverted by gravity through a 1% slope and enters the DN25 stainless steel vertical branch pipe 7; Water flows through vertical branch pipe 7 into DN32 horizontal pipe 8, and then through DN50 vertical main pipe 9 to the drainage ditch on the fourth underground floor. The drainage ditch directs water into the collection pit; The water level sensor in the sump monitors the water level. When the water level reaches the set height, the water pump is automatically started to pump the water to the rainwater collection tank 12 on the ground. The collected rainwater can be used for comprehensive purposes such as dust suppression by watering and watering greenery.

[0036] Throughout the process, the water immersion sensor monitors the water flow in the 10 drainage pipes in real time, and the liquid level sensor monitors the water level in the sump. In case of abnormalities, such as a sudden increase in water flow or an abnormal rise in water level, an alarm is automatically triggered, achieving all-weather intelligent monitoring.

[0037] This invention utilizes U-shaped stainless steel drainage channels 6 installed at the bottom of each vertical exterior wall 5, coupled with a 1% slope directional drainage structure. Seepage and condensation from the wall surface naturally flow into the channels along the vertical wall, then flow unimpeded towards the drainage interface. A complete channel is formed by vertical branch pipes 7, horizontal pipes 8, and the main pipe, all fully welded to the drainage channels 6, ultimately converging into a sump. When moisture is generated, the water immersion sensor at the inlet of the vertical branch pipe 7 immediately captures the signal, simultaneously triggering an alarm and linking with the liquid level sensor in the sump. Once the water level reaches a set value, the water pump automatically starts to drain the water. The entire process requires no manual intervention to quickly remove moisture, structurally preventing water erosion of the wall base layer and avoiding wall peeling. Simultaneously, it completely prevents electrical equipment from short-circuiting or corroding due to prolonged moisture, providing direct protection for the substation's structural safety and stable equipment operation.

[0038] Example 2 like Figure 3 As shown, a substation exterior wall panel has several through holes 13 on the decorative integrated panel 1. The through holes 13 are of different sizes and are arranged randomly. The through holes 13 are enclosed by stainless steel sleeves and covered with metal covers. The through holes 13 are used to connect fire protection pipes.

[0039] Example 3 A construction method for the external wall 5 of a substation includes the following specific steps: Vertical main pipe 9, horizontal pipe 8 and vertical branch pipe 7 are pre-embedded inside the outer wall 5 of the substation; According to the marked elevation lines, fix the top and bottom keels of the keel frame 4 on the outer wall 5 of each substation, and connect the C-type galvanized vertical keel to the top and bottom keels vertically with self-tapping screws. A flow guide 6 is installed at the bottom of the keel frame 4, and the flow guide 6 has a slope of 1%. A drain pipe 10 is connected at the bottommost guide channel 6, and a water immersion sensor is installed at the outlet of the drain pipe 10; the water immersion sensor is connected to the monitoring system and the mobile phone of the management personnel via a wire; The bottom horizontal pipe 8 is led to the drainage ditch and finally flows into the collection pit; the collection pit is equipped with a liquid level sensor and a water pump, and the collection pit is connected to the ground collection pool 12 to pump the water in the collection pit to the collection pool 12 for subsequent municipal irrigation. Install the decorative integrated panel 1 on the outside of the keel frame 4, seal it, and the construction is complete.

[0040] As a preferred example of the above embodiments, in the step of installing the decorative integrated panel 1 on the outside of the keel frame 4, a fireproof board 2 is added between the decorative integrated panel 1 and the keel frame 4.

[0041] As a preferred example of the above embodiments, the welded parts of the keel are coated with anti-rust paint to ensure the frame is corrosion resistant. As a preferred example of the above embodiment, the U-shaped stainless steel guide channel 6 is placed in sections at the bottom of the light steel keel frame 4, and the adjacent channels are fully welded to ensure that there is no leakage at the joint.

[0042] As a preferred example of the above embodiment, the step of pre-embedding the vertical main pipe 9, horizontal pipe 8, and vertical branch pipe 7 inside the substation outer wall 5 includes: Vertical branch pipe 7 installation: The DN25 stainless steel vertical branch pipe 7 with water-stop ring is pre-embedded in the reserved hole. The lower end of the branch pipe is welded to the stainless steel guide groove 6 and the water-stop ring is tightly attached to the wall base. Horizontal pipe 8 installation: The DN32 stainless steel horizontal pipe 8 is connected to the upper end of each vertical branch pipe 7 by welding or threaded connection, ensuring that the slope of the horizontal pipe 8 is consistent with the guide channel 6; Vertical main pipe 9 installation: Connect the DN50 stainless steel vertical main pipe 9 to the horizontal pipe 8. The spacing between the main pipes should be ≤150m, and the lower end should extend to the underground drainage ditch on the fourth floor.

[0043] As a preferred example of the above embodiment, in the step of installing the decorative integrated panel 1 on the outside of the keel frame 4, the basic fiber reinforced decorative integrated panel 1 is fixed to the light steel keel frame 4 with self-tapping screws; the gaps between the decorative integrated panels 1 are filled with sealant to ensure that the decorative surface is flat and beautiful, while preventing moisture from seeping into the interior of the panel.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A wall panel for an electrical substation outer wall, characterized by, The utility model relates to a kind of substation external wall drainage system, including: Several layers of keel frame (4), inside fixed to the outer wall (5) of corresponding layer of substation; Flow guide groove (6), it is arranged at the bottom of each layer of the keel frame (4), the flow guide groove (6) of the bottom layer is connected with drain pipe (10); Decorate integrated board (1), it is fixed to the outside of the keel frame (4); Flow guide system, including pre-buried in the vertical branch pipe (7) of substation outer wall, vertical main pipe (9) and horizontal pipe (8), the vertical branch pipe (7), vertical main pipe (9) and horizontal pipe (8) are fixedly connected between and communicate, the vertical branch pipe (7) is communicated with each layer of the flow guide groove (6); Water immersion sensor, it is installed in the mouth of drain pipe (10), when water flow passes, automatic alarm; Liquid level control device, including the liquid level sensor and water pump arranged in sump, the liquid level sensor and water pump signal connection, when water level is over limit, trigger alarm and automatically drain, water level drops to set lower limit and automatically stops water pump.

2. The substation exterior wall panel of claim 1, wherein, The keel frame (4) is the grid skeleton formed by C galvanized steel keel, and the skeleton is fixedly connected with the outer wall (5) of substation by expansion bolt (3).

3. The substation exterior wall panel of claim 1, wherein, The flow guide groove (6) is U-shaped groove.

4. The substation exterior wall panel of claim 1, wherein, The groove depth of the flow guide groove (6) is 100mm, the width is 50mm, and the groove bottom is provided with 1% slope.

5. The substation exterior wall panel of claim 1, wherein, The flow guide groove (6) is fixed to the bottom of light steel keel frame (4) by welding, and the corner of the flow guide groove (6) is integrally formed by laser cutting and bending.

6. The substation exterior wall panel of claim 1, wherein, The decorative integrated board (1) is fixed with light steel keel frame (4) by self-tapping screw, and the self-tapping screws are uniformly distributed.

7. The substation exterior wall panel of claim 1, wherein, In the flow guide system, the vertical branch pipe (7), vertical main pipe (9) and horizontal pipe (8) are all sleeved with water stop ring, and the connecting nodes of the vertical branch pipe (7), vertical main pipe (9) and horizontal pipe (8) are all filled with sealant.

8. The substation exterior wall panel of claim 1, wherein, It also includes fireproof board (2), and the fireproof board (2) is located between the keel frame (4) and the decorative integrated board (1).

9. A substation exterior wall method, characterized by, The following specific steps are included: Embed vertical main pipe (9), horizontal pipe (8) and vertical branch pipe (7) inside the outer wall (5) of substation; Fix keel frame (4) on each layer of substation outer wall (5); Install flow guide groove (6) at the bottom of keel frame (4), and the slope of the flow guide groove (6) is 1%; Connect drain pipe (10) at the bottom layer flow guide groove (6), and install water immersion sensor at the mouth of drain pipe (10); Lead the horizontal pipe (8) of the bottom layer to drain ditch, and finally converge to sump; Install decorative integrated board (1) on the outside of keel frame (4), seal, and complete construction.

10. A substation outer wall method as claimed in claim 9, characterised in that, In the step of installing decorative integrated board (1) on the outside of keel frame (4), fireproof board (2) is added between the decorative integrated board (1) and the keel frame (4).

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