Anti-condensation water guide structure for ring main unit instrument box and ring main unit instrument box

Abstract

The utility model provides an anti-condensation water guide structure for a ring main unit instrument box and the ring main unit instrument box, and relates to the technical field of ring main unit instrument box anti-condensation, the anti-condensation water guide structure for the ring main unit instrument box is used for internal anti-condensation drainage of the ring main unit instrument box, and comprises a top plate, a water absorption sponge, a water guide groove and a side plate, the water absorption sponge is installed on the inner wall of the top plate and used for absorbing water vapor, the water guide groove is installed below the water absorption sponge and used for collecting liquid seeping from the water absorption sponge, a water guide through hole is formed in the side plate, and one end of the water guide groove extends to the side plate and is in butt joint with the water guide through hole so that the liquid in the water guide groove can be discharged from the water guide through hole. According to the ring main unit instrument box, condensation and water vapor can be quickly and timely discharged, so that the condensation and the water vapor can be prevented from influencing the insulation performance of equipment in the ring main unit instrument box, and the influence of the condensation and the water vapor on the service life and the use safety of the ring main unit instrument box can be effectively reduced.

Description

Technical Field

[0001] This application relates to the technical field of anti-condensation for ring main unit instrument boxes, and specifically relates to an anti-condensation water guiding structure for a ring main unit instrument box and a ring main unit instrument box. Background Art

[0002] A ring main unit is a set of power transmission and distribution electrical equipment (high-voltage switchgear), which is an electrical equipment installed in a metal or non-metal insulated cabinet or made into a prefabricated sectionalized ring main unit power supply unit. Its core part uses a load switch and a fuse, and has the advantages of simple structure, small volume, low price, improved power supply parameters and performance, and power supply safety. It has been widely used in distribution substations and box-type substations in load centers such as urban residential areas, high-rise buildings, large public buildings, and industrial enterprises.

[0003] Currently, there is no corresponding active air circulation device or structure in a conventional ring main unit instrument box. When the temperature difference between day and night is large, the condensation, water vapor, etc. generated in the ring main unit instrument box accumulate in the ring main unit instrument box and cannot be actively discharged. These condensation, water vapor, etc. may adhere to secondary electrical equipment, electrical connection structures, etc., which will cause a significant reduction in the insulation performance of the equipment and even breakdown; at the same time, these condensation, water vapor, etc. are also likely to cause corrosion of the ring main unit instrument box itself, accelerate equipment aging, and pose potential safety hazards.

[0004] In view of this, how to quickly and timely discharge the condensation and water vapor in the ring main unit instrument box has become an urgent problem to be solved. Utility Model Content

[0005] In order to solve the technical problems in the related art, this application provides an anti-condensation water guiding structure for a ring main unit instrument box and a ring main unit instrument box. Through the anti-condensation water guiding structure for the ring main unit instrument box of this application, the condensation and water vapor in the ring main unit instrument box can be quickly and timely discharged, thereby avoiding the influence of condensation and water vapor on the insulation performance of the equipment in the ring main unit instrument box. At the same time, it can also effectively avoid the long-term accumulation of condensation and water vapor in the ring main unit instrument box, thereby reducing the influence of condensation and water vapor on the service life and use safety of the ring main unit instrument box itself.

[0006] In order to achieve the above purpose, the technical solutions adopted in this application include:

[0007] According to the first aspect of the present application, a dew condensation prevention and water drainage structure for a ring main unit instrument box is provided for internal dew condensation prevention and drainage of the ring main unit instrument box, including a top plate, a water absorption sponge, a water guide groove, and side plates. The water absorption sponge is installed on the inner wall of the top plate for absorbing water vapor. The water guide groove is installed below the water absorption sponge for collecting the liquid oozing from the water absorption sponge. A water guide through hole is formed on the side plate, and one end of the water guide groove extends to the side plate and is docked with the water guide through hole, so that the liquid in the water guide groove can be discharged from the water guide through hole.

[0008] Optionally, the top plate is installed obliquely. The top plate includes a first end and a second end arranged oppositely, wherein the horizontal position of the first end is higher than the horizontal position of the second end, and the water guide groove is installed below the second end.

[0009] Optionally, the height difference H between the first end and the second end satisfies: 15 mm ≤ H ≤ 20 mm.

[0010] Optionally, the dew condensation prevention and water drainage structure for the ring main unit instrument box further includes a pressing strip. The pressing strip is installed on the inner wall of the top plate, and there is a gap between the pressing strip and the top plate. The water absorption sponge is arranged between the top plate and the pressing strip.

[0011] Optionally, the pressing strip is detachably installed on the top plate.

[0012] Optionally, the dew condensation prevention and water drainage structure for the ring main unit instrument box further includes at least one bolt fastener. An installation through hole for the bolt fastener to pass through is formed on the pressing strip, and a fastening hole for installing the bolt fastener is formed on the top plate. The bolt fastener is used to detachably install the pressing strip on the top plate.

[0013] Optionally, two pressing strips are provided. The two pressing strips are arranged at intervals in a first direction, and each pressing strip extends in a second direction. The top plate is installed obliquely. The top plate includes a first end and a second end arranged oppositely, and the horizontal position of the first end is higher than the horizontal position of the second end. The water guide groove is installed below the second end.

[0014] Wherein, the first direction is the extending direction of the water guide groove, and the second direction is the direction pointing from the first end to the second end.

[0015] Optionally, two side plates are provided. The two side plates are arranged at intervals, and mutually corresponding water guide through holes are respectively formed on the two side plates. Both ends of the water guide groove respectively extend to the two side plates and are docked with the corresponding water guide through holes.

[0016] Optionally, the top surface of the water guiding groove is recessed inward to form a water guiding cavity. The water guiding cavity includes a first part and a second part that are connected to each other. The first part includes a first edge communicating with the second part and a second edge butting against one of the two side plates. The second part includes a third edge communicating with the first part and a fourth edge butting against the other of the two side plates;

[0017] Wherein, the horizontal position of the first edge is higher than the horizontal position of the second edge, and in the direction from the first edge to the second edge, the height of the first part gradually decreases; the horizontal position of the third edge is higher than the horizontal position of the fourth edge, and in the direction from the third edge to the fourth edge, the height of the second part gradually decreases.

[0018] According to a second aspect of the present application, there is also provided a ring main unit instrument box, including the anti-condensation water guiding structure for the ring main unit instrument box in any of the technical solutions in the first aspect of the present application.

[0019] Beneficial effects:

[0020] 1. Through the above technical solution, when there is water vapor in the anti-condensation water guiding structure for the ring main unit instrument box of the present application, when the water vapor rises to the vicinity of the water absorbing sponge, it will be adsorbed by the water absorbing sponge and condensed into dew or water droplets. These dew or water droplets will not condense on other structures of the ring main unit instrument box. Moreover, the dew or water droplets adsorbed by the water absorbing sponge will gather at the bottom of the water absorbing sponge under the action of gravity and seep out. The seeping dew or water droplets will fall into the water guiding groove and be guided by the water guiding groove to the water guiding through hole provided on the side plate, and then flow out of the ring main unit instrument box. In this way, the dew and water vapor in the ring main unit instrument box can be discharged quickly and timely, so as to avoid the influence of dew and water vapor on the insulation performance of the equipment in the ring main unit instrument box. At the same time, it can also effectively avoid the long-term accumulation of dew and water vapor in the ring main unit instrument box, thereby reducing the influence of dew and water vapor on the service life and use safety of the ring main unit instrument box itself.

[0021] 2. Other beneficial effects or advantages of the present application will be described in detail in combination with specific structures in the specific implementation manner. Description of the drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings. In addition, it should be understood that the proportional relationships of the various components in the accompanying drawings of this specification do not represent the proportional relationships in actual material selection and design. It is only a schematic diagram of the structure or position, where:

[0023] Figure 1 is a schematic assembly structure diagram of a ring main unit instrument box provided by an exemplary embodiment of the present application;

[0024] Figure 2 is a schematic partial sectional structure diagram of a ring main unit instrument box provided by an exemplary embodiment of the present application;

[0025] Figure 3 is Figure 2 a schematic enlarged partial structure diagram at position A in;

[0026] Figure 4 is a schematic three-dimensional structure diagram of a ring main unit instrument box provided by an exemplary embodiment of the present application;

[0027] Figure 5 is a schematic three-dimensional structure diagram of a water guide groove provided by an exemplary embodiment of the present application;

[0028] Figure 6 is a schematic partial sectional structure diagram of a water guide groove provided by an exemplary embodiment of the present application.

[0029] Explanation of reference numerals in the drawings:

[0030] 100 - Ring main unit instrument box; 101 - Anti - condensation water - guiding structure for the ring main unit instrument box; 1 - Top plate; 11 - First end; 12 - Second end; 2 - Absorbent sponge; 3 - Water guide groove; 31 - Water - guiding cavity; 311 - First part; 3111 - First edge; 3112 - Second edge; 312 - Second part; 3121 - Third edge; 3122 - Fourth edge; 4 - Side plate; 41 - Water - guiding through - hole; 5 - Press strip; 6 - Bolt fastener. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0032] Accordingly, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0033] In the description of the present application, it should be noted that the terms used, such as "first" and "second", are only for distinguishing expressions, rather than indicating or implying any importance or sequential difference; the terms used, such as "inside" and "outside", refer to the inside and outside of the specific contour. The use of the above terms is only for the convenience of clearly and simply expressing the technical solution of the present application and cannot be construed as a limitation of the present application.

[0034] The technical solution of the present application will be described in detail below with reference to the accompanying drawings.

[0035] Embodiment 1

[0036] As Figures 1 to 6 shown, this embodiment provides, according to the first aspect of the present application, a dew condensation prevention and water drainage structure 101 for a ring main unit instrument box, for internal dew condensation prevention and drainage of the ring main unit instrument box 100, including a top plate 1, a water absorption sponge 2, a water guide groove 3, and a side plate 4. The water absorption sponge 2 is installed on the inner wall of the top plate 1 for absorbing water vapor. The water guide groove 3 is installed below the water absorption sponge 2 for collecting the liquid oozing from the water absorption sponge 2. A water guide through hole 41 is formed on the side plate 4. One end of the water guide groove 3 extends to the side plate 4 and is docked with the water guide through hole 41 so that the liquid in the water guide groove 3 can be discharged from the water guide through hole 41.

[0037] Through the above technical solution, when there is water vapor in the dew condensation prevention and water drainage structure 101 for the ring main unit instrument box of the present application, when the water vapor rises to near the water absorption sponge 2, it will be adsorbed by the water absorption sponge 2 and condensed into dew or water droplets. These dew or water droplets will not condense on other structures of the ring main unit instrument box 100. Moreover, the dew or water droplets adsorbed by the water absorption sponge 2 will gather at the bottom of the water absorption sponge 2 and ooze out under the action of gravity. The oozed dew or water droplets will fall into the water guide groove 3 and be guided by the water guide groove 3 to the water guide through hole 41 provided on the side plate 4, and then flow out of the ring main unit instrument box 100. In this way, the dew condensation and water vapor in the ring main unit instrument box 100 can be quickly and timely discharged, thereby avoiding the influence of dew condensation and water vapor on the insulation performance of the equipment in the ring main unit instrument box 100. At the same time, it can also effectively avoid the long-term accumulation of dew condensation and water vapor in the ring main unit instrument box 100, thereby reducing the influence of dew condensation and water vapor on the service life and use safety of the ring main unit instrument box 100 itself.

[0038] In the above embodiments, it should be noted that, first, the size (width, length, and thickness) of the water-absorbing sponge 2 can be set according to the actual size of the switchgear instrument box 100, and the present application does not make specific limitations thereto. However, it can be understood that the water-absorbing sponge 2 can cover the inner wall of the entire top plate 1 to ensure the adsorption effect and adsorption efficiency for water vapor.

[0039] Second, the water-absorbing sponge 2 can be in various structural forms. For example, the water-absorbing sponge 2 can be formed into a plate-like structure. Correspondingly, the water guide groove 3 can be provided at the lowest point of the plate-like water-absorbing sponge 2 to accurately and reliably collect the condensed dew or water droplets oozing from the water-absorbing sponge 2. The water-absorbing sponge 2 can also be formed into a triangular prism shape. The triangular prism-shaped water-absorbing sponge 2 extends in the horizontal direction, one of its side surfaces is installed on the inner wall of the top plate 1, and the tip formed by the other two side surfaces is correspondingly arranged above the water guide groove 3, which can also accurately and reliably collect the condensed dew or water droplets oozing from the water-absorbing sponge 2.

[0040] In an embodiment of the present application, as Figure 2 shown, the top plate 1 of the present application can be installed obliquely. The top plate 1 can include a first end 11 and a second end 12 which are oppositely arranged. Among them, the horizontal position of the first end 11 is higher than the horizontal position of the second end 12, and the water guide groove 3 is installed below the second end 12.

[0041] In this way, through the top plate 1 arranged in this way, the water-absorbing sponge 2 provided on the inner wall of the top plate 1 can also be formed into an inclined shape, so that the condensed dew or water droplets oozing from the water-absorbing sponge 2 can be accurately and reliably collected in the water guide groove 3, facilitating the export of the condensed dew or water droplets.

[0042] In an embodiment of the present application, the height difference H between the first end 11 and the second end 12 of the present application can satisfy: 15 mm ≤ H ≤ 20 mm. It can be understood that the height difference H between the first end 11 and the second end 12 should not be too large or too small. If the height difference H is too small, the diversion effect is likely to be poor. If the height difference H is too large, the overall shape of the switchgear instrument box 100 is likely to be too irregular, which is not convenient for installation and use.

[0043] In this embodiment, when the height difference H between the first end 11 and the second end 12 is set to 15 mm, on the basis of ensuring that the overall shape of the switchgear instrument box 100 is relatively regular to the greatest extent, it is also beneficial to ensure that the condensed dew or water droplets oozing from the water-absorbing sponge 2 can be effectively and reliably diverted into the water guide groove 3, and the water diversion effect is relatively excellent. When the height difference between the first end 11 and the second end 12 is set to 20 mm, on the basis of ensuring the water diversion effect to the greatest extent, it is also beneficial to ensure that the overall shape of the switchgear instrument box 100 is relatively regular, facilitating installation and use.

[0044] In an embodiment of the present application, as Figures 1 to 3 shown, the dew condensation prevention and water drainage structure 101 for the instrument box of the ring main unit of the present application may further include a pressing strip 5. The pressing strip 5 is installed on the inner wall of the top plate 1, and there is a gap between the pressing strip 5 and the top plate 1. The water-absorbing sponge 2 is arranged between the top plate 1 and the pressing strip 5. In this way, by installing the water-absorbing sponge 2 on the inner wall of the top plate 1 through the pressing strip 5, it is not only convenient for the water-absorbing sponge 2 to stably and reliably adsorb water vapor at the inner wall of the top plate 1, but also beneficial to the installation, disassembly or replacement of the water-absorbing sponge 2.

[0045] It can be understood that the water-absorbing sponge 2 of the present application can also be installed in other forms. For example, the water-absorbing sponge 2 is directly adhered to the inner wall of the top plate 1, or the water-absorbing sponge 2 can also be directly installed on the inner wall of the top plate 1 through other limiting or mounting structures, such as buckles, pins, bolts, etc.

[0046] In an embodiment of the present application, the pressing strip 5 of the present application can be detachably installed on the top plate 1. In this way, the detachably arranged pressing strip 5 is not only convenient for maintenance and replacement itself, but also convenient for setting pressing strips 5 of different sizes according to water-absorbing sponges 2 of different sizes.

[0047] Of course, it can be understood that the pressing strip 5 of the present application can also be fixedly connected to the top plate 1.

[0048] In an embodiment of the present application, as Figures 1 to 3 shown, the dew condensation prevention and water drainage structure 101 for the instrument box of the ring main unit of the present application may further include at least one bolt fastener 6. The pressing strip 5 is provided with an installation through hole (not shown) for the bolt fastener 6 to pass through, and the top plate 1 is provided with a fastening hole (not shown) for the bolt fastener 6 to be installed. The bolt fastener 6 is used to detachably install the pressing strip 5 on the top plate 1. In this way, by installing the pressing strip 5 on the top plate 1 through the bolt fastener 6, the installation and disassembly of the pressing strip 5 can be very conveniently realized.

[0049] In this embodiment, it can be understood that, first, the fastening hole can be a blind hole (that is, not penetrating the top plate 1) or a through hole (that is, penetrating the top plate 1), and the present application does not make specific limitations on this.

[0050] Second, the number and setting position of the bolt fasteners 6 can be selected according to actual needs. For example, each pressing strip 5 can be correspondingly provided with two bolt fasteners 6, and the two bolt fasteners 6 are respectively correspondingly arranged at both ends of each pressing strip 5.

[0051] In an embodiment of the present application, as Figure 1As shown, two pressing strips 5 of the present application can be provided. The two pressing strips 5 are arranged at intervals in the first direction, and each pressing strip 5 extends in the second direction. The top plate 1 is installed obliquely. The top plate 1 includes a first end 11 and a second end 12 which are oppositely arranged. The horizontal position of the first end 11 is higher than that of the second end 12. The water guide groove 3 is installed below the second end 12. Among them, the first direction is the extending direction of the water guide groove 3, and the second direction is the direction from the first end 11 to the second end 12.

[0052] In this way, on the one hand, the two pressing strips 5 arranged at intervals in the first direction can reliably and stably install the water-absorbing sponge 2 on the inner wall of the top plate 1, so as to ensure its adsorption effect on water vapor. On the other hand, the pressing strip 5 extending in the second direction can not only play a role in fixing the water-absorbing sponge 2, but also has certain water guiding performance. Compared with the pressing strip 5 in other installation directions (for example, the pressing strip 5 extending in the first direction), it can play a role in guiding the condensed dew or water droplets exuded from the water-absorbing sponge 2, so that the condensed dew or water droplets exuded from the water-absorbing sponge 2 can be guided into the water guide groove 3.

[0053] In an embodiment of the present application, as Figure 1 and Figure 4 shown, two side plates 4 of the present application can be provided. The two side plates 4 are arranged at intervals. Water guiding through holes 41 corresponding to each other are respectively formed on the two side plates 4. The two ends of the water guide groove 3 respectively extend to the two side plates 4 and are docked with the corresponding water guiding through holes 41. In this way, the water guide groove 3 has two water outlets, and can more quickly and thoroughly discharge the liquid collected therein from the ring main unit instrument box 100.

[0054] In an embodiment of the present application, as Figure 5 and Figure 6 shown, the top surface of the water guide groove 3 of the present application is recessed inward to form a water guiding cavity 31. The water guiding cavity 31 includes a first part 311 and a second part 312 which are connected to each other. The first part 311 includes a first edge 3111 communicating with the second part 312 and a second edge 3112 docked with one of the two side plates 4. The second part 312 includes a third edge 3121 communicating with the first part 311 and a fourth edge 3122 docked with the other of the two side plates 4. Among them, the horizontal position of the first edge 3111 is higher than that of the second edge 3112, and in the direction from the first edge 3111 to the second edge 3112, the height of the first part 311 gradually decreases. The horizontal position of the third edge 3121 is higher than that of the fourth edge 3122, and in the direction from the third edge 3121 to the fourth edge 3122, the height of the second part 312 gradually decreases.

[0055] In this way, through the water guide groove 3 arranged in this manner, the liquid collected therein can be more quickly and effectively guided outside the two side plates 4.

[0056] According to the second aspect of the present application, as Figure 1 and Figure 4 , a ring main unit instrument box 100 is further provided, which includes the anti-condensation water guide structure 101 for the ring main unit instrument box in any technical solution of the first aspect of the present application.

[0057] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A condensation prevention and water drainage structure for the instrument box of a ring main unit, which is used for preventing condensation and draining water inside the instrument box of the ring main unit, and is characterized in that, It includes a top plate (1), a water-absorbing sponge (2), a water guide groove (3) and side plates (4). The water-absorbing sponge (2) is installed on the inner wall of the top plate (1) for absorbing water vapor. The water guide groove (3) is installed below the water-absorbing sponge (2) for collecting the liquid seeping out from the water-absorbing sponge (2). A water guide through hole (41) is formed on the side plate (4). One end of the water guide groove (3) extends to the side plate (4) and is docked with the water guide through hole (41) so that the liquid in the water guide groove (3) can be discharged from the water guide through hole (41).

2. The anti-condensation water guiding structure for the instrument box of the ring main unit according to claim 1, characterized in that, The top plate (1) is installed obliquely. The top plate (1) includes a first end (11) and a second end (12) which are oppositely arranged. Among them, the horizontal position of the first end (11) is higher than the horizontal position of the second end (12), and the water guide groove (3) is installed below the second end (12).

3. The anti-condensation water guiding structure for the instrument box of the ring main unit according to claim 2, characterized in that, The height difference H between the first end (11) and the second end (12) satisfies: 15 mm ≤ H ≤ 20 mm.

4. The anti-condensation water guiding structure for the instrument box of the ring main unit cabinet according to claim 1, characterized in that, The anti-condensation water guide structure for the ring main unit instrument box further includes a pressing strip (5). The pressing strip (5) is installed on the inner wall of the top plate (1), and there is a gap between the pressing strip (5) and the top plate (1). The water-absorbing sponge (2) is arranged between the top plate (1) and the pressing strip (5).

5. The anti - condensation water - guiding structure for the instrument box of the ring - main unit cabinet according to claim 4, characterized in that, The pressing strip (5) is detachably installed on the top plate (1).

6. The anti-condensation water guide structure for the instrument box of the ring main unit cabinet according to claim 4, characterized in that, The anti-condensation water guide structure for the ring main unit instrument box further includes at least one bolt fastener (6). An installation through hole for the bolt fastener (6) to pass through is formed on the pressing strip (5), and a fastening hole for installing the bolt fastener (6) is formed on the top plate (1). The bolt fastener (6) is used to detachably install the pressing strip (5) on the top plate (1).

7. The anti-condensation water guiding structure for the instrument box of the ring main unit cabinet according to claim 4, characterized in that, There are two pressing strips (5). The two pressing strips (5) are arranged at intervals in the first direction, and each pressing strip (5) extends in the second direction. The top plate (1) is installed obliquely. The top plate (1) includes a first end (11) and a second end (12) which are oppositely arranged. The horizontal position of the first end (11) is higher than the horizontal position of the second end (12), and the water guide groove (3) is installed below the second end (12). Among them, the first direction is the extending direction of the water guide groove (3), and the second direction is the direction pointing from the first end (11) to the second end (12).

8. The anti-condensation water conduction structure for the instrument box of the ring main unit according to claim 1, characterized in that, There are two side plates (4). The two side plates (4) are arranged at intervals. Water guide through holes (41) corresponding to each other are respectively formed on the two side plates (4). Both ends of the water guide groove (3) extend to the two side plates (4) respectively and are docked with the corresponding water guide through holes (41).

9. The anti-condensation water guiding structure for the instrument box of the ring main unit according to claim 8, characterized in that, The top surface of the water guide groove (3) is recessed inward to form a water guide cavity (31). The water guide cavity (31) includes a first part (311) and a second part (312) that are connected to each other. The first part (311) includes a first edge (3111) communicating with the second part (312) and a second edge (3112) docked with one of the two side plates (4). The second part (312) includes a third edge (3121) communicating with the first part (311) and a fourth edge (3122) docked with the other of the two side plates (4). Wherein, the horizontal position of the first edge (3111) is higher than the horizontal position of the second edge (3112), and in the direction from the first edge (3111) to the second edge (3112), the height of the first part (311) gradually decreases; the horizontal position of the third edge (3121) is higher than the horizontal position of the fourth edge (3122), and in the direction from the third edge (3121) to the fourth edge (3122), the height of the second part (312) gradually decreases.

10. A ring main unit instrument box, characterized in that, It includes the anti-condensation water guide structure for the ring main unit instrument box according to any one of claims 1-9.

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