Resin-based composite cover plate for electric power

Abstract

The present application relates to the technical field of building roof cover plate, and particularly relates to a resin-based composite cover plate for electric power. The technical scheme comprises a base plate and an exhaust assembly; at least one exhaust assembly is arranged on the base plate, and the exhaust assembly penetrates the base plate; when the air pressure on one side of the base plate is greater than that of the external environment, the exhaust assembly is opened to allow air flow to flow from one side of the base plate to the external space, so as to balance the air pressure difference between one side of the base plate and the external space. Technical effects: through the working of the device, the problem that the base plate is lifted and flown due to the air in the cable channel abutting against the base plate when flowing to the external space is avoided.

Description

Technical Field

[0001] This invention relates to the field of building roof cover technology, and more particularly to a resin-based composite material cover for power applications. Background Technology

[0002] With the widespread application of distributed photovoltaics on the roofs of commercial and industrial buildings, the demand for power well covers is increasing as an important component for protecting roof pipelines, access ports and some photovoltaic equipment connection points. These covers are usually made of composite resin (especially glass fiber reinforced resin) and internal skeleton by molding, and have the advantages of insulation, corrosion resistance, lightweight and high strength, making them suitable for outdoor and roof environments. However, existing cover plates still have significant technical shortcomings in rooftop photovoltaic applications, especially in areas with frequent extreme weather: When extreme winds such as typhoons occur, the high-speed airflow passing over the surface of the cover plate will generate a significant negative pressure effect (Bernoulli effect). In the existing technology, the cover plate with frame is mostly fastened with bolts, but it lacks an effective structure to actively balance the air pressure, which poses a safety hazard. Summary of the Invention

[0003] The purpose of this invention is to provide a resin-based composite material cover for power generation, which solves the problem that existing cover plates on building roofs are easily blown away by high-speed airflow.

[0004] To achieve this objective, the present invention adopts the following technical solution: a resin-based composite material cover for power applications, comprising a substrate and an exhaust assembly; At least one of the exhaust components is disposed on the substrate, and the exhaust component penetrates the substrate. The exhaust assembly is activated when the air pressure in the space on one side of the substrate is greater than that in the external environment, allowing airflow to be discharged from the side of the substrate to the external space in order to balance the air pressure difference between the space on the side of the substrate and the external space.

[0005] Compared with the prior art, the present invention has the following advantages: the operation of this device avoids the problem that when the air inside the cable channel flows into the external space, it touches the substrate and causes the substrate to be blown away. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0008] Figure 1 A schematic diagram of the structure of a resin-based composite material cover plate for power applications; Figure 2 This is a cross-sectional view of a resin-based composite material cover plate for power applications. Figure 3 A schematic diagram of the structural support component 3 and the exhaust assembly 2 for a resin-based composite material cover plate for power applications; Figure 4 A schematic diagram of the exhaust assembly 2 for a resin-based composite material cover plate for power applications; Figure 5 A schematic diagram of the anti-slip protrusion 4 of a resin-based composite material cover plate for power applications; Figure 6 The anti-slip protrusion 4 of the cover plate for power resin-based composite material exploded.

[0009] Illustration: Base plate 1, Exhaust assembly 2, One-way valve 21, connecting cylinder 22, connecting chamber 22a, Structural bearing component 3 Support rod 31, grid window 31a, Reinforcing rod 32 Anti-slip convex part 4. 41 raised strip, 41a drainage channel Reflective layer 42. Detailed Implementation

[0010] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0011] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0012] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] This invention provides a resin-based composite material cover plate for power applications, such as... Figures 1-6 As shown, it includes a substrate 1 and an exhaust assembly 2; At least one of the exhaust components 2 is disposed on the substrate 1, and the exhaust component 2 penetrates the substrate 1. The exhaust assembly 2 is activated when the air pressure in the space on one side of the substrate 1 is greater than that in the external environment, allowing airflow to be discharged from the side of the substrate 1 to the external space in order to balance the air pressure difference between the space on one side of the substrate 1 and the external space.

[0014] Specifically, to prevent cables from aging due to water erosion and sunlight exposure (especially in coastal areas of temperate, subtropical, and tropical monsoon climates), existing technology requires that the cable channel be relatively isolated from the external space. Furthermore, to facilitate maintenance of the cables within the channel, openings are typically provided. Existing technologies require cover plates to conceal cable channel openings, and to ensure the stability of these cover plates, they are typically secured to the cable channels with bolts. However, this means the cable tunnel is relatively isolated from the outside space. When extreme winds such as typhoons occur, the high-speed airflow sweeping across the cover surface will create a significant negative pressure effect (Bernoulli effect), which can cause the cover to be lifted. Specifically, when a high-speed airflow passes through the existing cover plate, the cover plate is lifted by the airflow inside the cable channel, causing the fixing bolts to move slightly. After the high-speed airflow passes through the existing cover plate multiple times, the bolts fixing the cover plate loosen. When the high-speed airflow passes over the cover plate, the cover plate loses its effective bolt fixation and will be lifted off by the air inside the cable channel under the negative pressure effect (for example, a category 12 typhoon will generate a suction force of more than 1.2kN / m² on the cover plate, that is, the cover plate is subjected to a tensile force of more than 120kg per square meter). Therefore, this device is equipped with an exhaust component 2. When the air flow rate in the external space is too fast, since the example channel 001 is relatively isolated from the external space, the air pressure in the external space is low. When the air inside the cable channel flows to the external space, it will preferentially flow out from the exhaust component 2, which can avoid the problem that the air inside the cable channel will touch the substrate 1 when it flows to the external space, thus causing the substrate 1 to be blown away.

[0015] Preferably, the exhaust assembly 2 includes a one-way valve 21 and a connecting cylinder 22; The connecting cylinder 22 is fixedly connected to the substrate 1. The connecting cylinder 22 has a connecting cavity 22a, which penetrates the substrate 1. The one-way valve 21 is screwed into the connecting cavity 22a.

[0016] Preferably, the one-way valve 21 is provided with an airflow monitoring element.

[0017] Specifically, the exhaust assembly 2 includes a one-way valve 21 and a connecting cylinder 22. Since the one-way valve 21 is connected to the connecting cylinder 22 by a thread, if it is damaged during long-term use or in case of accident, the maintenance personnel only need to loosen the thread to remove the old one-way valve 21 and replace it with a new one-way valve 21 without damaging or replacing the entire base plate 1. This modular design greatly reduces maintenance costs and time. Furthermore, before this device is put into operation, the airflow monitoring component is connected to an external terminal device. The valve body of the one-way valve 21 is equipped with an airflow monitoring device, such as a miniature turbine flow meter or a thermal flow sensor. The one-way valve 21 uses the airflow monitoring device to detect the gas velocity or flow rate data flowing through the valve body in real time, and can transmit the data to an external handheld terminal or central monitoring platform via cable or wireless module (such as NB-IoT or LoRa communication unit).

[0018] When the one-way valve 21 is in normal working condition and there is no internal blockage, its airflow will match the ambient air pressure, internal temperature and humidity, and external wind force, exhibiting a dynamic change that conforms to a certain pattern. Once the one-way valve 21 is partially blocked by foreign objects (such as fallen leaves, insects, or dust clumps), its effective flow cross-sectional area will decrease, resulting in an abnormally low monitored airflow value compared to the historical normal data range or theoretical expected value under the same pressure conditions. The monitoring software of the external terminal device can identify this abnormal pattern early and accurately by comparing real-time data with the normal model through a preset algorithm, and issue an early warning to maintenance personnel. In this way, maintenance tasks can be scheduled in advance without the need for daily manual inspections or waiting for the cover plate function to fail, thereby significantly improving the maintainability, early warning safety, and long-term operational reliability of the entire exhaust system.

[0019] Preferably, the substrate 1 is made of a composite resin substrate; the composite resin substrate includes synthetic resin, fiber reinforcement material and filler aggregate.

[0020] Specifically, in routine maintenance, staff frequently need to inspect the cables within the cable channels. Since the working environment for the cable covers is on the roof of a building, and existing cable covers are made of metal or concrete, their weight is extremely heavy, which is very detrimental to routine maintenance. Furthermore, metal and concrete materials are more prone to weathering after long-term exposure to sunlight and water accumulation. Therefore, the substrate (1) is made of a composite resin substrate composed of synthetic resin (such as unsaturated polyester resin (UPR), epoxy resin, etc.), fiber reinforcement materials (such as chopped glass fiber, continuous fiber felt, etc.) and filler aggregates (such as quartz sand, calcium carbonate powder, etc.). Its constituent materials are lighter than traditional metal or concrete materials per unit volume, making it easier for staff to inspect and maintain cables. The composite resin substrate has higher UV resistance, which can extend the service life of this device.

[0021] Preferably, it further includes a structural support member 3, which is embedded in the substrate 1.

[0022] Preferably, the structural support member 3 includes a plurality of mutually fixedly connected support rods 31, and there are gaps between adjacent support rods 31 to form a plurality of grid windows 31a, and the exhaust assembly 2 passes through one of the grid windows 31a.

[0023] Preferably, a plurality of reinforcing rods 32 are provided on the outer periphery of the exhaust assembly 2, one end of the reinforcing rod 32 is connected to the corresponding support rod 31, and the other end extends toward the exhaust assembly 2.

[0024] Specifically, a structural support member 3 is provided inside the substrate 1. The structural integrity of the substrate 1 is enhanced by the embedded support of the structural support member 3. When the cover plate 1 is subjected to pressure from above (such as people stepping on it or equipment squeezing it) or internal air pressure from below, the structural support member 3 acts as an internal skeleton, effectively dispersing stress and preventing the base plate 1 from bending as a whole or collapsing locally. Furthermore, when additional handles, lifting rings, or other accessories need to be installed on the cover plate 1, the connection point can be directly fixed to the structural support component 3, avoiding the problems of "pull-out" or "slippage" that are easily caused by the bolts being directly screwed into the composite resin substrate.

[0025] Among them, the structural load-bearing component 3 is usually made of corrosion-resistant metal (such as stainless steel) or high-strength plastic; Furthermore, the structural support member 3 is composed of multiple mutually fixedly connected support rods 31 with pre-drilled gaps between adjacent members. This design forms a grid-like frame to create multiple grid windows 31a. In this way, while ensuring the structural strength of the cover plate 1, the amount of metal (or high-strength plastic) used is minimized, reducing the overall weight of the device, and at the same time avoiding air bubbles caused by using solid embedded parts inside the cover plate 1. Furthermore, during the molding of the cover plate 1, the composite resin substrate can evenly penetrate and wrap each area of ​​the structural support member 3, ensuring a firm bond. Furthermore, the exhaust assembly 2 can pass directly through one of the grid windows 31a without the need for additional drilling or opening on the structural support 3, which significantly reduces the complexity and processing difficulty of manufacturing and installation. Furthermore, since the exhaust assembly 2 penetrates the substrate 1 and passes through the mesh window 31a, the area where the exhaust assembly 2 is in direct contact with the substrate 1 is not directly supported by the structural load-bearing member 3, thus becoming a weak point in mechanical structure. This leads to microcracks or damage in this area of ​​the substrate 1 due to stress concentration. Therefore, a number of outwardly radially extending reinforcing rods 32 are provided on the outer periphery of the exhaust assembly 2. One end of each reinforcing rod 32 is fixedly connected to the adjacent support rod 31, and the other end extends radially inward and approaches or contacts the outer wall of the exhaust assembly 2. Furthermore, a local annular reinforcing ring is established around the exhaust assembly 2 to prevent microcracks or damage from stress concentration in the substrate 1 in this area, thereby slowing down material fatigue degradation under wind load and frequent changes in air pressure.

[0026] Preferably, a non-slip protrusion 4 is provided on one side wall of the substrate 1, and during installation, the non-slip protrusion 4 faces the external space.

[0027] Preferably, the anti-slip protrusion 4 includes a plurality of protrusions 41 with triangular cross sections, and the edges of adjacent protrusions 41 are connected to each other to form a drainage groove 41a at the connection.

[0028] Preferably, a reflective layer 42 is provided on the outer surface of the protrusion 41.

[0029] Specifically, the anti-slip protrusion 4 of this device uses multiple triangular-shaped protrusions 41 with their edges connected to each other. At the connection position of two adjacent protrusions 41, such as... Figure 1 and Figure 5 As shown, its structure forms a continuous "V-shaped" drainage channel 41a. Compared to traditional dot-shaped or flat-topped strip-shaped protrusions, the "V-shaped" drainage groove 41a provides a confluence and guiding channel for liquids (such as rainwater) falling on the surface of the substrate 1, thereby significantly improving the instantaneous drainage capacity of this device and effectively reducing water accumulation on the surface of the substrate 1. Furthermore, since the cross-section of the protrusion 41 is triangular, under natural light (especially sunlight), its oblique surface becomes the main light-receiving surface at different times of the day, depending on the angle of sunlight incidence. That is, for any convex strip 41, the energy of light, heat and ultraviolet rays does not act continuously and concentratedly on a single plane, but is distributed to different sides at different times. This significantly slows down the aging rate of substrate 1, effectively extends the overall service life of the device in outdoor environments, and reduces the probability of early failure caused by material surface powdering and cracking. Furthermore, the surface of the raised strip 41 has a reflective layer 42, which is essentially a functional coating or film that can directionally reflect incident light (especially ultraviolet light and infrared radiation) back to the external environment. The reflective layer 42 significantly reduces the light and heat energy absorbed by the protrusion 41 by reflecting most of the solar radiation, thereby suppressing problems such as thermal and oxygen aging, surface powdering and color fading of the substrate 1 caused by photothermal effect and ultraviolet chemical action. Furthermore, the reflective layer 42 works in conjunction with the protrusion 41. On the one hand, the dynamically changing illumination angle shortens the continuous heating time of the inclined surface of the protrusion 41, avoiding energy concentration on a single plane. On the other hand, the reflective layer 42 further reduces the total radiation dose received by the surface of the protrusion 41, thereby further improving the substrate 1's resistance to light aging in outdoor environments, thus maintaining its mechanical strength for longer and effectively extending the service life of the device.

[0030] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A resin-based composite material cover for power applications, comprising a substrate (1) and an exhaust assembly (2); At least one of the exhaust components (2) is disposed on the substrate (1), and the exhaust component (2) penetrates the substrate (1). The exhaust assembly (2) is activated when the air pressure in the space on one side of the substrate (1) is greater than that in the external environment, allowing airflow to be discharged from the side of the substrate (1) to the external space, so as to balance the air pressure difference between the space on one side of the substrate (1) and the external space.

2. The resin-based composite cover plate for electric power use according to claim 1, characterized by The exhaust assembly (2) includes a one-way valve (21) and a connecting cylinder (22); The connecting cylinder (22) is fixedly connected to the substrate (1). The connecting cylinder (22) has a connecting cavity (22a) that penetrates the substrate (1). The one-way valve (21) is screwed into the connecting cavity (22a).

3. The resin-based composite cover plate for electric power use according to claim 2, characterized by The one-way valve (21) is equipped with an airflow monitoring device.

4. The resin-based composite cover plate for electric power use according to claim 2, characterized by The substrate (1) is made of a composite resin substrate; the composite resin substrate includes synthetic resin, fiber reinforcement material and filler aggregate.

5. The power-use resin-based composite material cover plate according to claim 4, characterized in that, It also includes a structural support member (3), which is embedded in the substrate (1).

6. The power-use resin-based composite material cover plate according to claim 5, characterized in that, The structural support member (3) includes a plurality of mutually fixedly connected support rods (31), and there are gaps between adjacent support rods (31) to form a plurality of grid windows (31a), and the exhaust assembly (2) passes through one of the grid windows (31a).

7. The power-use resin-based composite material cover plate according to claim 6, characterized in that, The outer periphery of the exhaust assembly (2) is provided with a plurality of reinforcing rods (32), one end of the reinforcing rod (32) is connected to the corresponding support rod (31), and the other end extends toward the exhaust assembly (2).

8. The power supply resin-based composite material cover plate according to any one of claims 3-7, characterized in that, The substrate (1) has an anti-slip protrusion (4) on one side wall. When installed, the anti-slip protrusion (4) faces the external space.

9. The power-use resin-based composite material cover plate according to claim 8, characterized in that, The anti-slip protrusion (4) includes a plurality of protrusions (41) with triangular cross sections, and the edges of adjacent protrusions (41) are connected to each other to form a drainage groove (41a) at the connection.

10. The resin-based composite material cover plate for power applications according to claim 9, characterized in that, A reflective layer (42) is provided on the outer surface of the protrusion (41).

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