A type of underground prefabricated substation

Abstract

This utility model belongs to the field of electrical equipment technology, and in particular relates to an underground prefabricated substation, including a box body, a box cover, and a sealing assembly. Power distribution equipment is installed inside the box body. A limiting protrusion extends from the bottom of the box cover and is tightly fitted against the inner wall of the box body. A sliding groove is provided inside the box cover and the limiting protrusion. An equipment hoisting port communicating with the sliding groove is opened on the box cover. The sealing assembly includes an outer cover and an inner cover, which are connected to each other and spaced a fixed distance apart. The inner cover is slidably disposed in the sliding groove, and the outer cover is slidably disposed on the upper surface of the box cover. The sealing assembly is used to close or open the equipment hoisting port. This facilitates the replacement of electrical equipment inside the box in the future, ensuring both stronger sealing and the connection strength of the sealing assembly.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, and in particular relates to an underground prefabricated substation. Background Technology

[0002] A substation is a location in a power system that transforms voltage and current, receives electrical energy, and distributes it. An underground substation, on the other hand, has its entire enclosure buried underground, housing electrical components such as high-voltage switchgear, low-voltage switchgear, and transformers. Underground substations are smaller in size, and by placing the electrical components underground, they eliminate noise interference on the surface.

[0003] Compared to traditional substations, underground substations bury the enclosure underground. The top of the enclosure is usually sealed and waterproofed, leaving only a small manhole for maintenance personnel to enter and exit. However, this entrance is small and can only accommodate maintenance personnel to enter and exit the enclosure, but it is not possible to move the electrical equipment (such as transformers, low-voltage cabinets, and high-voltage cabinets) inside the enclosure. Therefore, once the equipment is installed, it is difficult to replace the electrical equipment inside the enclosure (especially larger electrical equipment such as transformers, high-voltage cabinets, and low-voltage cabinets) later. Utility Model Content

[0004] In view of the technical problems existing in the background art, this utility model provides a buried prefabricated substation.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] An underground prefabricated substation includes a housing, a cover, and a sealing assembly. Power distribution equipment is installed inside the housing. A limiting protrusion extends from the bottom of the cover and is tightly fitted against the inner wall of the housing. A sliding groove is provided inside the cover and the limiting protrusion. An equipment hoisting port communicating with the sliding groove is opened on the cover. The sealing assembly includes an outer cover and an inner cover, which are connected to each other and spaced a fixed distance apart. The inner cover is slidably disposed in the sliding groove, and the outer cover is slidably disposed on the upper surface of the cover. The sealing assembly is used to close or open the equipment hoisting port.

[0007] Optionally, a plurality of support blocks are provided on one side of the bottom of the outer cover, and a connecting block is provided at the bottom of the support blocks; a plurality of positioning grooves are provided at the upper end of the inner cover, and the connecting block is disposed in the positioning groove.

[0008] Optionally, the inner cover is provided with a U-shaped pull rod, and the outer cover is provided with a guide hole, through which the pull rod passes upward to the upper side of the outer cover.

[0009] Optionally, the upper end of the box cover is provided with a U-shaped baffle, which is arranged around the outside of the equipment hoisting port; the inner wall of the outer cover is slidably arranged against the outer wall of the baffle; a clearance groove is provided on one side of the outer cover, and the two sides of the baffle are slidably arranged in the clearance groove.

[0010] Optionally, one side of the box cover is provided with a bevel, which is located on the side of the equipment hoisting port; when the outer cover slides to close the equipment hoisting port, one side of the outer cover slides to the position of the bevel.

[0011] Optionally, a locking nut is threaded onto the pull rod, and two snap-fit ​​blocks are provided on the inner wall of the equipment hoisting port. The snap-fit ​​blocks are provided with U-shaped guide grooves, and a locking groove is provided at the upper end of the guide grooves. When the outer cover slides to close the equipment hoisting port, both ends of the pull rod slide into the guide grooves, and the locking nut is screwed downwards and tightened in the locking groove.

[0012] Optionally, the inner cover is provided with a through groove.

[0013] Optionally, a limiting ring is provided at the bottom end of the locking nut, the locking groove is annular, and the limiting ring is fitted in the locking groove.

[0014] Optionally, the cover has a first inspection manhole communicating with the slide groove, and the limiting protrusion has a second inspection manhole communicating with the slide groove. The diameter of the first inspection manhole is larger than the diameter of the second inspection manhole. The first inspection manhole and the second inspection manhole are coaxial, and pressure caps are provided on the first inspection manhole and the second inspection manhole.

[0015] Optionally, the bottom end of the gland is provided with a first sealing part and a second sealing part in sequence. The diameter of the first sealing part is larger than the diameter of the second sealing part. The first sealing part is disposed in the first maintenance manhole, and the second sealing part is disposed in the second maintenance manhole.

[0016] This utility model has the following advantages and beneficial effects:

[0017] This utility model designs a pre-installed underground substation. After the substation is pre-installed underground, the enclosure components can be opened or closed later to facilitate the replacement of electrical equipment (especially larger electrical equipment such as transformers, high-voltage cabinets, and low-voltage cabinets) inside the enclosure. The double-cover design of the outer and inner covers ensures both stronger sealing and enhanced connection strength of the enclosure components. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the underground prefabricated substation in this utility model;

[0019] Figure 2 This is a cross-sectional view of the underground prefabricated substation of this utility model;

[0020] Figure 3 for Figure 2 Enlarged view of a portion of the central structure;

[0021] Figure 4 This is a structural diagram of the box cover of this utility model;

[0022] Figure 5 for Figure 2 Front view;

[0023] Figure 6 This is a sectional view of the box cover of this utility model;

[0024] Figure 7 for Figure 4 A magnified view of a portion of point a;

[0025] Figure 8 for Figure 5 Top view;

[0026] Figure 9 This is a structural diagram of the pressure cap in this utility model;

[0027] Figure 10 This is one of the structural diagrams of the outer cover in this utility model;

[0028] Figure 11 This is the second structural diagram of the outer cover in this utility model;

[0029] Figure 12 This is a structural diagram of the inner cover in this utility model;

[0030] Figure 13 This is one of the structural diagrams of the closed component in this utility model;

[0031] Figure 14 This is the second structural diagram of the closed component in this utility model;

[0032] Figure 15 This is a front view of the closed component in this utility model;

[0033] Figure 16 for Figure 15 A cross-sectional view along the AA direction.

[0034] Reference numerals: 1-Box body, 11-Air duct, 12-Heat dissipation fins, 2-Box cover, 21-Limiting protrusion, 211-Second maintenance manhole, 22-Slide groove, 23-Equipment hoisting port, 24-First maintenance manhole, 25-First connecting hole, 26-Bevel, 27-Baffle, 28-Snap-fit ​​block, 281-Guide groove, 282-Locking groove, 3-Pressure cap, 31-First sealing part, 32-Second sealing part, 33-Handle, 34-Second connecting hole, 4-Outer cover, 41-Allowing groove, 42-Guide hole, 43-Support block, 44-Connecting block, 45-Third connecting hole, 5-Inner cover, 51-Through groove, 52-Positioning groove, 53-Fourth connecting hole, 6-Pull rod, 61-Locking nut, 62-Limiting ring, 7-High / low voltage cabinet, 8-Transformer. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] Example

[0038] like Figures 1-3 As shown, an underground prefabricated substation includes a housing 1, a cover 2, and enclosed components. Power distribution equipment, including high / low voltage switchgear 7 and transformers 8, is installed inside the housing 1. The two sides of the housing 1 are connected by U-shaped ducts 11, on which fans can be installed. The bottom section of the ducts 11 (i.e., the section of duct 11 on the lower side of the housing 1) is equipped with heat dissipation fins 12. When the housing 1 is prefabricated underground, the underground space is used to exchange heat and cool the air inside the housing 1, achieving efficient heat dissipation for the power distribution equipment.

[0039] like Figures 1-16As shown, a limiting protrusion 21 extends from the bottom of the box cover 2. The box cover 2 is located at the upper end of the box body 1, and the limiting protrusion 21 is tightly attached to the inner wall of the box body 1. A sliding groove 22 is provided inside the box cover 2 and the limiting protrusion 21. An equipment hoisting port 23 communicating with the sliding groove 22 is provided on the box cover 2, allowing for the hoisting and replacement of internal electrical distribution equipment. The sealing assembly includes an outer cover 4 and an inner cover 5, which are connected to each other and spaced a fixed distance apart. The inner cover 5 is slidably disposed in the sliding groove 22, and the outer cover 4 is slidably disposed on the upper surface of the box cover 2. The sealing assembly is used to close or open the equipment hoisting port 23.

[0040] Once the substation is pre-installed underground, the enclosure components can be opened or closed later to facilitate the replacement of electrical equipment (especially larger equipment such as transformer 8, high-voltage switchgear, and low-voltage switchgear) inside enclosure 1. The double-cover design of the outer cover 4 and the inner cover 5 ensures both stronger sealing and secure connection of the enclosure components.

[0041] like Figures 1-16 As shown, further, a plurality of support blocks 43 are provided on one side of the bottom of the outer cover 4, and a connecting block 44 is provided at the bottom of the support block 43. A plurality of third connecting holes 45 are provided on the connecting block 44. A plurality of positioning grooves 52 are provided at the upper end of the inner cover 5, and a plurality of fourth connecting holes 53 are provided within the positioning grooves 52. The connecting block 44 is positioned within the positioning groove 52, and the third connecting holes 45 and the fourth connecting holes 53 correspond one-to-one. Screws are then inserted into the third connecting holes 45 and the fourth connecting holes 53 for fixation. This structure enables a stable connection between the outer cover 4 and the inner cover 5, and facilitates easy assembly and disassembly.

[0042] like Figures 1-16 As shown, the inner cover 5 is further provided with a U-shaped pull rod 6, and the outer cover 4 is provided with a guide hole 42. The pull rod 6 passes upward through the guide hole 42 to the upper side of the outer cover 4. The connection between the pull rod 6 and the guide hole 42 further strengthens the connection between the inner cover 5 and the outer cover 4.

[0043] like Figures 1-16 As shown, furthermore, a U-shaped baffle 27 is provided at the upper end of the cover 2, and the baffle 27 is arranged around the outside of the equipment hoisting port 23. The inner wall of the outer cover 4 is slidably set against the outer wall of the baffle 27 to achieve sliding limit of the outer cover 4. At the same time, the presence of the baffle 27 increases the sealing and waterproof performance. An avoidance groove 41 is provided on one side of the outer cover 4, and the two sides of the baffle 27 are slidably set in the avoidance groove 41. This design achieves stable sliding of the baffle 27 and the outer cover 4 on the baffle 27, and the sealing of the connection is ensured through the cooperation of the baffle 27 and the outer cover 4.

[0044] like Figure 3As shown, further, one side of the cover 2 is provided with a bevel 26, which is located on the side of the equipment hoisting port 23. When the outer cover 4 slides to close the equipment hoisting port 23, one side of the outer cover 4 slides to the position of the bevel 26. This design is because the baffle 27 is U-shaped, and the equipment hoisting port 23 is protected by the baffle 27 on three sides, with one side being an opening. Therefore, the cover 2 on this side is provided with a bevel 26. When there is rainwater or other fluid, the fluid on the outer cover 4 will flow down through the bevel 26, thereby playing a drainage role and preventing water from entering the inner cover 5 through the outer cover 4, thus increasing the sealing performance.

[0045] like Figures 1-16 As shown, in this invention, locking nuts 61 are threaded onto both sides of the pull rod 6. Two locking blocks 28 are provided on the inner wall of the equipment hoisting port 23. Each locking block 28 has a U-shaped guide groove 281, which is directly opposite the vertical section of the pull rod 6. A locking groove 282 is located at the upper end of the guide groove 281. When the outer cover 4 and inner cover 5 simultaneously slide to close the equipment hoisting port 23, the vertical sections at both ends of the pull rod 6 slide into the guide groove 281, and the locking nuts 61 are screwed downwards into the locking groove 282. This design ensures that when the pull rod 6 is pulled to close the inner cover 5 and outer cover 4, the locking nuts 61 are tightened in the locking groove 282, preventing the outer cover 4 and inner cover 5 from opening backwards, thus providing a safe locking function.

[0046] Furthermore, the inner cover 5 is provided with a through groove 51. A hand can be inserted through the through groove 51 to tighten the locking nut 61. In this way, the outer cover 4 and the inner cover 5 are locked from inside the housing 1. Therefore, the inner cover 5 and the outer cover 4 can only be opened from the inside. This structure has better waterproof performance and prevents the outer cover 4 and the inner cover 5 from being opened from the outside, ensuring the connection security of the sealing components (outer cover 4 and inner cover 5).

[0047] Furthermore, a limiting ring 62 is provided at the bottom of the locking nut 61, and the locking groove 282 is annular, with the limiting ring 62 fitting within the locking groove 282. The limiting ring 62 fitting within the annular locking groove 282 achieves a tighter lock, ensuring that the inner cover 5 and the outer cover 4 are securely closed.

[0048] like Figures 1-3 As shown, in this utility model, the cover 2 has a first maintenance manhole 24 communicating with the slide groove 22, and the limiting protrusion 21 has a second maintenance manhole 211 communicating with the slide groove 22. The diameter of the first maintenance manhole 24 is larger than the diameter of the second maintenance manhole 211. The first maintenance manhole 24 and the second maintenance manhole 211 are coaxial. The first maintenance manhole 24 and the second maintenance manhole 211 are provided with pressure caps 3.

[0049] Furthermore, the pressure cap 3 is provided with a handle 33. A first sealing part 31 and a second sealing part 32 are sequentially provided at the bottom of the pressure cap 3. The diameter of the first sealing part 31 is larger than the diameter of the second sealing part 32. The first sealing part 31 is located in the first maintenance manhole 24, and its bottom end is tightly attached to the bottom wall of the slide groove 22. The second sealing part 32 is located in the second maintenance manhole 211. The pressure cap 3 is provided with several second connecting holes 34, and several first connecting holes 25 are provided on the outer side of the first maintenance manhole 24. The first connecting holes 25 and the second connecting holes 34 correspond one-to-one. By screwing in the locking screws, the pressure cap 3 can be fixed to the box cover 2. This structure provides better sealing. During later maintenance, the pressure cover 3 can be opened to enter the interior of the housing 1. If it is necessary to replace large electrical equipment (such as transformer 8) later, the pressure cover 3 can be opened first to enter the housing 1. Then, the hand can be inserted through the through groove 51 to operate and tighten the locking nut 61 to disengage the limit ring 62 from the locking groove 282. Then the closed components (inner cover 5 and outer cover 4) can be slid to open the equipment hoisting port 23.

[0050] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A prefabricated underground substation, comprising a casing, a cover, and an enclosure assembly, characterized in that: The enclosure is equipped with power distribution equipment, and the bottom end of the enclosure cover extends with a limiting protrusion, which is closely attached to the inner wall of the enclosure. The box cover and the limiting protrusion are provided with a sliding groove inside, and the box cover is provided with a hoisting port that communicates with the sliding groove; The sealing assembly includes an outer cover and an inner cover, which are connected to each other and are spaced a fixed distance apart. The inner cover is slidably disposed in a groove, and the outer cover is slidably disposed on the upper surface of the box cover. The sealing assembly is used to close or open the hoisting port of the equipment.

2. The underground prefabricated substation according to claim 1, characterized in that: The outer cover has several support blocks on one side of its bottom end, and the support blocks have connecting blocks at their bottom ends; the inner cover has several positioning grooves at its top end, and the connecting blocks are positioned in the positioning grooves.

3. The underground prefabricated substation according to claim 2, characterized in that: The inner cover is provided with a U-shaped pull rod, and the outer cover is provided with a guide hole. The pull rod passes upward through the guide hole to the upper side of the outer cover.

4. The underground prefabricated substation according to claim 3, characterized in that: The upper end of the box cover is provided with a U-shaped baffle, which is arranged around the outside of the equipment hoisting port; the inner wall of the outer cover is slidably arranged against the outer wall of the baffle; a clearance groove is provided on one side of the outer cover, and the two sides of the baffle are slidably arranged in the clearance groove.

5. The underground prefabricated substation according to claim 4, characterized in that: The box cover has a bevel on one side, which is located on the side of the equipment hoisting port; when the outer cover slides to close the equipment hoisting port, one side of the outer cover slides to the position of the bevel.

6. The underground prefabricated substation according to claim 3, characterized in that: The pull rod is threaded with a locking nut, and the inner wall of the equipment hoisting port is provided with two snap-fit ​​blocks. The snap-fit ​​blocks are provided with U-shaped guide grooves, and the upper end of the guide grooves is provided with locking grooves. When the outer cover slides to close the equipment hoisting port, the two ends of the pull rod slide into the guide grooves, and the locking nut is screwed downwards and tightened in the locking grooves.

7. The underground prefabricated substation according to claim 6, characterized in that: The inner cover is provided with a through groove.

8. The underground prefabricated substation according to claim 6, characterized in that: The bottom end of the locking nut is provided with a limiting ring, the locking groove is configured as an annular shape, and the limiting ring is fitted in the locking groove.

9. The underground prefabricated substation according to claim 1, characterized in that: The box cover has a first inspection manhole that communicates with the slide groove, and the limiting protrusion has a second inspection manhole that communicates with the slide groove. The diameter of the first inspection manhole is larger than the diameter of the second inspection manhole. The first inspection manhole and the second inspection manhole are coaxial. The first inspection manhole and the second inspection manhole are provided with pressure caps.

10. The underground prefabricated substation according to claim 9, characterized in that: The bottom end of the pressure cap is provided with a first sealing part and a second sealing part in sequence. The diameter of the first sealing part is larger than the diameter of the second sealing part. The first sealing part is located in the first maintenance manhole, and the second sealing part is located in the second maintenance manhole.

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