Ventilated roof structure for a box-type substation

Abstract

This utility model relates to the field of prefabricated substation technology and discloses a ventilated top cover structure for a prefabricated substation, including a substation body. A lower top cover is fixed to the top surface of the substation body, and an upper top cover is disposed on the top surface of the lower top cover. A heat dissipation assembly is disposed between the lower and upper top covers. This utility model uses a cooling fan to guide hot airflow from the flow hole and along the inclined surface of an umbrella-shaped guide plate to the space between the lower and upper top covers, and then discharges it from the exhaust hole, thereby effectively dissipating heat from the substation body. During this process, after the hot airflow enters the top surface of the lower top cover, as it flows along the inclined surface of the umbrella-shaped guide plate, the temperature drops to the dew point, causing condensation on the inclined surface of the umbrella-shaped guide plate. The dew then flows along the inclined surface of the umbrella-shaped guide plate and drips onto the top surface of the lower top cover, and is then guided along the inclined surface of the top surface of the lower top cover to the drain hole for discharge. This effectively prevents the risk of dew condensing inside the top cover and flowing back into the substation body.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated substation technology, and in particular to a ventilation top cover structure for a prefabricated substation. Background Technology

[0002] A prefabricated substation, also known as a prefabricated transformer substation, is a type of high-voltage switchgear, distribution transformer, and low-voltage distribution equipment. It is particularly suitable for urban power grid construction and renovation, and is a new type of substation that has emerged after civil engineering substations.

[0003] An existing ventilation top cover structure for a prefabricated substation (publication number: CN222338887U) has at least the following drawbacks: While the device provides multiple exhaust fans and vents on the top cover to effectively increase heat dissipation, it lacks an effective condensation diversion and discharge mechanism. Existing prefabricated substations typically use heating pipes to control the internal gas temperature, maintaining it at the dew point +3 degrees Celsius to prevent condensation. However, because the exhaust system is not located on the top cover, there is no temperature control system inside. This results in a situation where, as airflow passes through the long internal channels of the top cover, the increased airflow velocity leads to a temperature drop, potentially causing the air temperature to fall back to the dew point. Consequently, condensation occurs on the top cover when the airflow encounters the mechanism, making it difficult to discharge and potentially causing dew to flow back into the prefabricated substation. Therefore, this invention is proposed. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a ventilation top cover structure for a box-type substation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A ventilation top cover structure for a prefabricated substation includes a substation body. A lower top cover is fixed to the top surface of the substation body, and an upper top cover is provided on the top surface of the lower top cover. A heat dissipation assembly is provided between the lower top cover and the upper top cover. The heat dissipation assembly includes an umbrella-shaped guide plate fixed at the middle position of the top surface of the lower top cover. Several cooling fans are installed on the umbrella-shaped guide plate and the lower top cover. Several exhaust holes are opened on the top surface of the upper top cover. Flow holes are opened on both sides of the umbrella-shaped guide plate on the top surface of the lower top cover. Several drainage holes are opened on the top surface of the lower top cover near the left and right sides.

[0007] As a further embodiment of this utility model, the two ends of the front side of the lower top cover extend to the front and rear sides of the substation body, respectively, the drainage hole leads to the outside of the substation body, and the cooling fan and the exhaust hole are positioned correspondingly.

[0008] As a further embodiment of this utility model, the slope of the inclined plates at both ends of the umbrella-shaped guide plate is the same as the slope of the top surface of the lower top cover, and the length of the inclined plates at both ends of the lower top cover is greater than the width of the flow hole.

[0009] As a further embodiment of this utility model, a number of rain shields are fixed on the top surface of the upper cover, and the positions of the rain shields and the ventilation holes correspond to each other.

[0010] As a further embodiment of this utility model, a protective grille is provided on the front side of the rain shield.

[0011] As a further embodiment of this utility model, the top surfaces of the upper and lower top covers are detachably installed by bolts, a number of mounting strips are fixed between the umbrella-shaped guide plate and the lower top cover, the cooling fan is detachably installed with the top surfaces of two adjacent mounting strips by bolts, and the protective grille is detachably installed with one side of the rain shield by bolts.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The cooling fan draws hot air from the substation body through the flow holes. The hot air is then guided along the inclined surface of the umbrella-shaped guide plate between the lower and upper top covers and discharged through the exhaust vents, effectively cooling the substation body. During this process, as the hot air enters the top surface of the lower top cover and flows along the inclined surface of the umbrella-shaped guide plate, the temperature drops to the dew point, causing condensation on the inclined surface of the umbrella-shaped guide plate. The dew then flows along the inclined surface of the umbrella-shaped guide plate and drips onto the top surface of the lower top cover. Subsequently, it is guided along the inclined surface of the top surface of the lower top cover to the drainage holes for discharge. This effectively prevents the risk of dew condensing inside the top cover and flowing back into the substation body. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a ventilation top cover structure for a box-type substation proposed in this utility model;

[0015] Figure 2 This is a three-dimensional sectional view of the top cover of a ventilated top cover structure for a box-type substation proposed in this utility model.

[0016] Figure 3 for Figure 2 A magnified schematic diagram of the partial three-dimensional structure of A in the middle;

[0017] Figure 4 This is a three-dimensional structural diagram of the rain shield of the ventilation top cover structure of a box-type substation proposed in this utility model.

[0018] In the diagram: 1. Substation main body; 101. Lower top cover; 102. Upper top cover; 2. Umbrella-shaped guide plate; 201. Cooling fan; 202. Exhaust vent; 203. Flow hole; 204. Drain hole; 205. Mounting strip; 3. Rain guard; 4. Protective grille. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figures 1-4 As shown, a ventilation top cover structure for a box-type substation includes a substation body 1. A lower top cover 101 is fixed to the top surface of the substation body 1. An upper top cover 102 is provided on the top surface of the lower top cover 101. A heat dissipation assembly is provided between the lower top cover 101 and the upper top cover 102. The heat dissipation assembly includes an umbrella-shaped guide plate 2 fixed at the middle position of the top surface of the lower top cover 101. Several cooling fans 201 are installed on the umbrella-shaped guide plate 2 and the lower top cover 101. Several exhaust holes 202 are opened on the top surface of the upper top cover 102. Flow holes 203 are opened on both sides of the umbrella-shaped guide plate 2 on the top surface of the lower top cover 101. Several drainage holes 204 are opened on the top surface of the lower top cover 101 near the left and right sides.

[0023] like Figures 2-4As shown, in this embodiment, the front ends of the lower top cover 101 extend to the front and rear sides of the substation body 1, respectively. The drain hole 204 leads to the outside of the substation body 1. The cooling fan 201 and the exhaust hole 202 are positioned correspondingly. By activating the cooling fan 201, exhaust air is drawn from the inside of the substation body 1, so that the hot airflow is led out from the flow hole 203 and guided along the inclined surface of the umbrella-shaped guide plate 2 between the lower top cover 101 and the upper top cover 102, and discharged from the exhaust hole 202, thereby ventilating the substation body 1. The main body of the substation 1 effectively dissipates heat. During this process, after the hot air enters the top surface of the lower top cover 101, it flows along the inclined surface of the umbrella-shaped guide plate 2. When the air temperature drops to the dew point, condensation occurs on the inclined surface of the umbrella-shaped guide plate 2. The dew then flows along the inclined surface of the umbrella-shaped guide plate 2 and drips onto the top surface of the lower top cover 101. Subsequently, it is guided to the drainage hole 204 on the inclined surface of the top surface of the lower top cover 101 and discharged. This effectively prevents the risk of backflow of dew into the main body of the substation 1 due to the inability to drain the condensed dew inside the top cover.

[0024] like Figures 2-4 As shown in this embodiment, the slope of the inclined plates at both ends of the umbrella-shaped guide plate 2 is the same as the slope of the top surface of the lower top cover 101. The length of the inclined plates at both ends of the lower top cover 101 is greater than the width of the flow hole 203. Since the slope of the inclined plates at both ends of the umbrella-shaped guide plate 2 is the same as the slope of the top surface of the lower top cover 101, and the length of the inclined plates at both ends of the lower top cover 101 is greater than the width of the flow hole 203, it can prevent the dew on the inclined surface of the lower top cover 101 from dripping back into the substation body 1 through the flow hole 203.

[0025] like Figures 2-4 As shown in this embodiment, a number of rain shields 3 are fixed on the top surface of the upper cover 102. The rain shields 3 are positioned corresponding to the ventilation holes 202. By setting the rain shields 3, the ventilation holes 202 can be blocked to prevent rainwater from entering the lower cover 101 from the ventilation holes 202.

[0026] like Figures 2-4 As shown in this embodiment, a protective grille 4 is provided on the front side of the rain shield 3. By providing the protective grille 4, the ventilation hole 202 can be protected to prevent insects or large debris from entering the rain shield 3 and causing blockage.

[0027] like Figures 2-4 As shown, in this embodiment, the top surfaces of the upper cover 102 and the lower cover 101 are detachably installed by bolts. Several mounting strips 205 are fixed between the umbrella-shaped guide plate 2 and the lower cover 101. The cooling fan 201 and the top surfaces of two adjacent mounting strips 205 are detachably installed by bolts. The protective grille 4 is detachably installed to one side of the rain shield 3 by bolts. The detachable installation of the upper cover 102 and the lower cover 101, the cooling fan 201 and the mounting strips 205, and the protective grille 4 and the rain shield 3 by bolts facilitates disassembly and maintenance.

[0028] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: In use, when it is necessary to dissipate heat from the main body 1 of the substation, the cooling fan 201 is activated to exhaust air from the inside of the main body 1 of the substation. The hot airflow is led out from the flow hole 203 and guided along the inclined surface of the umbrella-shaped guide plate 2 to the space between the lower top cover 101 and the upper top cover 102, and then discharged from the exhaust hole 202, thereby effectively dissipating heat from the main body 1 of the substation. During this process, after the hot airflow enters the top surface of the lower top cover 101, it flows along the inclined surface of the umbrella-shaped guide plate 2. When the airflow temperature drops to the dew point, condensation occurs on the inclined surface of the umbrella-shaped guide plate 2. The dew flows along the inclined surface of the umbrella-shaped guide plate 2 and drips onto the top surface of the lower top cover 101, and then is guided along the inclined surface of the top surface of the lower top cover 101 to the drain hole 204 for discharge, effectively preventing the dew from being discharged due to the heat inside the top cover. The condensed dew cannot be discharged, posing a risk of backflow into the main body 1 of the substation. The slope of the inclined plates at both ends of the umbrella-shaped guide plate 2 is the same as the slope of the top surface of the lower top cover 101, and the length of the inclined plates at both ends of the lower top cover 101 is greater than the width of the flow hole 203. This can prevent the dew on the inclined surface of the lower top cover 101 from dripping back into the main body 1 of the substation through the flow hole 203. The rain shield 3 can be installed to cover the exhaust hole 202 to prevent rainwater from entering the lower top cover 101 from the exhaust hole 202. The protective grille 4 can be installed to protect the exhaust hole 202 and prevent insects or large debris from entering the rain shield 3 and causing blockage. The upper top cover 102 and the lower top cover 101, the cooling fan 201 and the mounting strip 205, and the protective grille 4 and the rain shield 3 are all installed with bolts for easy disassembly and maintenance.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A ventilated top cover structure for a prefabricated substation, applied to the main body (1) of the substation, characterized in that, The substation body (1) has a lower top cover (101) fixed on its top surface. The lower top cover (101) has an upper top cover (102) on its top surface. A heat dissipation assembly is provided between the lower top cover (101) and the upper top cover (102). The heat dissipation assembly includes an umbrella-shaped guide plate (2) fixed at the middle position of the top surface of the lower top cover (101). Several cooling fans (201) are installed on the umbrella-shaped guide plate (2) and the lower top cover (101). Several exhaust holes (202) are opened on the top surface of the upper top cover (102). Flow holes (203) are opened on both sides of the top surface of the lower top cover (101) near the umbrella-shaped guide plate (2). Several drainage holes (204) are opened on the top surface of the lower top cover (101) near the left and right sides.

2. The ventilation top cover structure of a prefabricated substation according to claim 1, characterized in that, The front ends of the lower top cover (101) extend to the front and rear sides of the substation body (1), respectively. The drainage hole (204) leads to the outside of the substation body (1), and the cooling fan (201) corresponds to the position of the exhaust hole (202).

3. The ventilation top cover structure of a prefabricated substation according to claim 2, characterized in that, The slope of the two inclined plates at both ends of the umbrella-shaped guide plate (2) is the same as the slope of the top surface of the lower top cover (101), and the length of the two inclined plates at both ends of the lower top cover (101) is greater than the width of the flow hole (203).

4. The ventilation top cover structure of a prefabricated substation according to claim 3, characterized in that, The top surface of the top cover (102) is fixed with several rain shields (3), and the rain shields (3) are positioned corresponding to the ventilation holes (202).

5. The ventilation top cover structure of a prefabricated substation according to claim 4, characterized in that, A protective grille (4) is provided on the front side of the rain shield (3).

6. The ventilation top cover structure of a prefabricated substation according to claim 5, characterized in that, The top surfaces of the upper cover (102) and the lower cover (101) are detachably installed by bolts. Several mounting strips (205) are fixed between the umbrella-shaped guide plate (2) and the lower cover (101). The top surfaces of the cooling fan (201) and two adjacent mounting strips (205) are detachably installed by bolts. The protective grille (4) is detachably installed on one side of the rain shield (3) by bolts.

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