Air sandwich type heat insulation roof and box-type substation using the same

Abstract

The utility model discloses an air sandwich type heat insulation top cover and box type substation using the air sandwich type heat insulation top cover, and the heat insulation top cover is composed of the upper cover and lower cover of metal, the upper cover is several and sets up on the upper surface of lower cover, the cavity is formed air sandwich layer between the upper cover and lower cover, is equipped with the heat dissipation slit in the side of cavity, and the air sandwich layer is communicated with outside environment through the heat dissipation slit. The utility model uses the three -layer structure similar to "sandwich biscuit" under the condition of not influencing the original box function and overall appearance, utilizes flowing air as the medium of heat insulation and heat dissipation, prevents the thermal invasion from top to bottom, reduces the temperature rise of the box body inside caused by solar radiation from the source, reduces the temperature of box while not increasing too many box cost, and can reduce the power consumption of the heat dissipation and heat exchange of box, greatly optimizes the operation performance of box, so that it can adapt to more severe installation environment.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated substations, and particularly relates to an air-insulated sandwich top cover, as well as a prefabricated substation using the air-insulated sandwich top cover. Background Technology

[0002] According to the design requirements of prefabricated substations, the temperature rise requirements specified in GB / T 17467-2020 "High Voltage / Low Voltage Prefabricated Substations" must be met. In particular, the maximum allowable operating temperature of electronic components in the low-voltage cabinet cannot exceed 70℃. This requires that the temperature rise inside the low-voltage cabinet of the prefabricated substation cannot exceed 30K under an ambient temperature of up to 40℃. In photovoltaic power generation projects, the design capacity ratio of photovoltaic modules is generally ≥1.1. Thus, on sunny days with abundant sunshine, the prefabricated substation operates under an overload of 1.1 times for at least 3 to 4 hours per day. Conventional cooling methods usually only use fans to extract the high-temperature air inside the box to achieve air circulation cooling, or use heat exchangers similar to air conditioning for cooling.

[0003] Although many current cooling solutions for transformer substations can meet the requirements and high temperatures are rare under normal operating conditions, the power required by using fans and heat exchangers is relatively large, which will consume too much electricity. Utility Model Content

[0004] The first objective of this invention is to provide an air-insulated sandwich top cover that is simple in structure, low in cost, and can prevent external heat intrusion to reduce the temperature rise inside the cabinet, thereby reducing power consumption.

[0005] The first objective of this utility model is achieved through the following technical measures: an air-insulated sandwich top cover, characterized in that it consists of a metal upper cover and a lower cover, wherein there are several upper covers and they are disposed on the upper surface of the lower cover, and an air sandwich layer is formed between the upper cover and the lower cover, and a heat dissipation slit is provided on the side of the cavity, and the air sandwich layer is connected to the external environment through the heat dissipation slit.

[0006] This invention, without affecting the original functions and overall appearance of the transformer substation, uses a three-layer structure similar to a "sandwich," utilizing flowing air as a medium for heat insulation and dissipation. This prevents heat intrusion from top to bottom, reducing the internal temperature rise of the enclosure caused by solar radiation at the source. It significantly reduces the temperature of the transformer substation without increasing its cost excessively, and also reduces the power consumed by the transformer substation for heat dissipation and heat exchange. This triple benefit greatly optimizes the operating performance of the transformer substation, enabling it to adapt to harsher installation environments.

[0007] The upper cover of this utility model is an inverted groove-shaped structure, and the heat dissipation seam is located on the opposite side walls of the upper cover.

[0008] The lower cover of this utility model is an inverted groove-shaped structure, and the top plate of the lower cover is inverted V-shaped.

[0009] The upper cover of this utility model is arranged in an array on the lower cover, and there is a gap between the sides of two adjacent rows of upper covers with heat dissipation seams so that the heat dissipation seams on them can be directly connected to the external environment.

[0010] The top plate of the lower cover of this utility model has a step, and the heat dissipation seam on the upper cover located on the upper step surface is higher than that on the upper cover located on the lower step surface.

[0011] The present invention provides a lifting lug on the top plate of the lower cover.

[0012] This utility model provides reflective anti-collision markings on the outer surface of the corner of the lower cover.

[0013] The height of the heat dissipation slit in this invention is half that of the side wall of the upper cover.

[0014] The second objective of this invention is to provide a box-type substation using the aforementioned air-insulated sandwich top cover.

[0015] The second objective of this utility model is achieved through the following technical measures: a box-type substation, comprising a box body and a top cover installed on the upper end of the box body, characterized in that the top cover is the aforementioned air-insulated sandwich top cover.

[0016] Compared with the prior art, the present invention has the following significant technical effects:

[0017] (1) This utility model cools down the transformer from the source by means of insulation. Specifically, it uses a three-layer structure similar to a "sandwich". It uses flowing air as a medium for insulation and heat dissipation, preventing heat from entering from top to bottom. This reduces the temperature rise inside the transformer caused by solar radiation from the source, thereby enhancing the transformer's resistance to high environmental temperatures and reducing the power consumption of the transformer for heat dissipation.

[0018] (2) The heat-insulating top cover of the transformer substation of this utility model further improves the performance of the transformer substation product, enabling it to adapt to harsher installation environments.

[0019] (3) This utility model has a simple structure, low cost, strong practicality, and is suitable for widespread promotion and use. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0022] Figure 2This is the second three-dimensional structural schematic diagram of this utility model;

[0023] Figure 3 This is a cross-sectional view of the present invention;

[0024] Figure 4 This is one of the working principle diagrams of this utility model;

[0025] Figure 5 This is the second working principle diagram of this utility model.

[0026] In the diagram: 1-Top cover; 2-Lower cover; 3-Air sandwich layer; 4-Heat dissipation seam; 5-Step; 6-Top plate; 7-Gap; 8-Reinforcing rod; 9-Hanging lug; 10-Reflective anti-collision sign. Detailed Implementation

[0027] like Figures 1-3 As shown, this utility model discloses an air-insulated sandwich top cover, which consists of a metal upper cover 1 and a lower cover 2. There are several upper covers 1 and they are disposed on the upper surface of the lower cover 2. There is a cavity between the upper cover 1 and the lower cover 2 to form an air sandwich layer 3. A heat dissipation slit 4 is provided on the side of the cavity. The air sandwich layer 3 is connected to the external environment through the heat dissipation slit 4.

[0028] The upper cover 1 has an inverted concave structure, with heat dissipation slits 4 located on opposite side walls of the upper cover 1. The height of the heat dissipation slits 4 is half the height of the side walls of the upper cover 1. The lower cover 2 has an inverted concave structure, and its top plate 6 is inverted V-shaped. The upper covers 1 are arranged in an array on the lower cover 2, and there is a gap 7 between the sides of adjacent rows of upper covers 1 with heat dissipation slits 4, allowing the heat dissipation slits 4 to communicate directly with the external environment. The top plate 6 of the lower cover 2 has a step 5, and the heat dissipation slits 4 on the upper cover 1 located on the upper step surface are higher than those on the lower step surface of the upper cover 1.

[0029] A lifting lug 9 is provided on the top plate 6 of the lower cover 2 for lifting the top cover and installing it on the box body. Reflective anti-collision markings 10 are provided on the outer surface of the corners of the lower cover 2.

[0030] The working principle of this utility model is as follows: The top cover consists of an upper cover and a lower cover, with an air sandwich layer between the upper and lower covers to allow air circulation at that location. The air in the sandwich layer can serve as a heat insulation medium. At the same time, since the temperature of the air under solar radiation is lower than the temperature of the sheet metal structure (upper and lower covers), according to the law of entropy increase (i.e., the second law of thermodynamics), heat will be transferred from the high-temperature sheet metal structure to the low-temperature air. Moreover, the low-temperature air is flowing. After a portion of the low-temperature air absorbs heat, it will be replaced and replenished by new low-temperature air, forming a good heat output port, and ultimately achieving the functions of heat insulation and heat dissipation.

[0031] This utility model's top cover consists of a lower cover and an upper cover with multiple areas on the lower cover. Each upper cover has a heat dissipation slit on its side, allowing each area to dissipate heat independently. This ensures that after receiving solar radiation, the air in each individual "sandwich layer" can circulate promptly after being heated. The advantage is that the heat dissipation of each heat-insulating area does not affect the others, avoiding heat accumulation and ensuring that the heat insulation performance of this utility model is at its optimal state.

[0032] In each individual "sandwich layer" region, air can enter the space between the upper and lower covers through the heat dissipation slits, forming a "sandwich" layer. This air acts as both an insulation medium and a heat dissipation carrier. In calm or low-wind conditions, this "sandwich" air acts as a static insulation medium; in windy conditions, it acts as a dynamic heat dissipation carrier. The following explanation will elaborate on both static and dynamic forms:

[0033] like Figure 4 As shown, in a static state, since the environment is windless or with little wind, the air sandwich layer 3 is stationary in the "sandwich" area, absorbing part of the heat radiated by the sun A from the upper cover 1, preventing this part of the heat from being transferred to the lower cover 2, so that less heat is transferred to the inside of the box, thus playing the role of heat insulation medium.

[0034] like Figure 5 As shown, in the dynamic state, due to the wind in the environment, external air B will enter the "sandwich" area through the heat dissipation slit 4 and flow out from the heat dissipation slit 4 on the other side. In this case, the air in the "sandwich" layer that has absorbed and stored heat in the static state will be replaced, and the temperature of the "sandwich" layer air will be reset to the new external air temperature, thus playing a role in heat dissipation.

[0035] If there is a continuous breeze in the environment, the air in the "sandwich" layer will be constantly renewed and replaced. The heat from solar radiation on the top cover 1 and the heat generated inside the transformer itself will be continuously carried away by the flowing air in the "sandwich" layer, and the heat dissipation effect will be more obvious.

[0036] The lower cover 2 is equipped with a reinforcing rod 8 that provides support and reinforcement, and a connecting structure that connects the box body.

[0037] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An air sandwiched insulating roof covering characterised in that: It consists of a metal upper cover and a lower cover. There are several upper covers, which are disposed on the upper surface of the lower cover. There is a cavity between the upper cover and the lower cover to form an air sandwich layer. A heat dissipation slit is provided on the side of the cavity. The air sandwich layer is connected to the external environment through the heat dissipation slit.

2. The air sandwiched insulating roof covering according to claim 1, characterized in that: The top cover has an inverted groove-shaped structure, and the heat dissipation slits are located on the opposite side walls of the top cover.

3. The air sandwiched insulating roof covering according to claim 2, characterized in that: The lower cover has an inverted groove-shaped structure, and the top plate of the lower cover is inverted V-shaped.

4. The air sandwiched insulating roof covering according to claim 3, characterized in that: The upper cover is arranged in an array on the lower cover, and there is a gap between the sides of two adjacent rows of upper covers with heat dissipation slits so that the heat dissipation slits on them can be directly connected to the external environment.

5. The air-insulated sandwich roof according to claim 4, characterized in that: The top plate of the lower cover has a step, and the heat dissipation slit on the upper cover located on the upper step surface is higher than that on the upper cover located on the lower step surface.

6. The air sandwiched insulating roof covering according to claim 5, characterized in that: The top plate of the lower cover is provided with lifting lugs.

7. The air sandwiched insulating roof covering according to claim 6, characterized in that: Reflective anti-collision markings are provided on the outer surface of the corners of the lower cover.

8. The air sandwiched insulating roof covering according to claim 7, characterized in that: The height of the heat dissipation slit is half that of the side wall of the upper cover.

9. A box-type substation comprising a box and a roof mounted on an upper end of the box, characterized in that: The top cover is the air-insulated sandwich top cover as described in any one of claims 1 to 8.

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