Compact ring main unit

Abstract

The utility model relates to a compact ring main unit, which comprises a cabinet body and a cabinet door, a circuit breaker and an isolating switch are arranged in the cabinet body, the cabinet door is formed by hinging a first door plate, a second door plate, a third door plate and a fourth door plate which are longitudinally arranged, and the opening end of the cabinet body is fixedly connected with a guide plate at each of the two sides of the cabinet door. The upper end of the first door plate is rotationally connected into the groove of the guide plate, and the two sides of the lower end of the second door plate, the two sides of the upper end of the third door plate and the two sides of the lower end of the fourth door plate are connected with a first guide rod, a second guide rod and a third guide rod located in the groove of the guide plate correspondingly. A locking rod penetrating through the third guide rod is slidably arranged on the inner side of the fourth door plate, a sliding groove is formed in the fourth door plate, the end of the locking rod is fixedly connected with a shifting plate penetrating through the sliding groove, and a first locking hole and a second locking hole which are matched with the locking rod and distributed up and down are formed in the guide plate. According to the compact ring main unit, a larger maintenance space is provided when the cabinet door is opened, and maintenance operation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker cabinets, in particular to a compact ring network cabinet. Background Art

[0002] Ring Main Unit is a group of electrical equipment (high voltage switchgear) installed in a metal or non-metallic insulated cabinet or assembled into a spaced ring main unit. Its core part uses isolating switches and circuit breakers, which have the advantages of simple structure, small size, low price, improved power supply parameters and performance, and power supply safety. It is widely used in distribution stations and box-type substations in urban residential areas, high-rise buildings, large public buildings, factories and enterprises and other load centers.

[0003] A door is provided on the ring network cabinet so that the ring network cabinet can be inspected and maintained during use. Generally, in the prior art, the door of the ring network cabinet is opened on the left or right side. However, since multiple ring network cabinets are arranged side by side when networking, this results in that when multiple ring network cabinets are inspected and maintained at the same time, the ring network cabinet, especially the compact ring network cabinet, has a small cabinet width. Therefore, the ring network cabinet located in the middle after networking is affected by the doors of the adjacent ring network cabinets, resulting in a small maintenance operation space, which is inconvenient for maintenance operations.

[0004] In view of the above problems, the present invention makes improvements. Summary of the invention

[0005] The utility model provides a compact ring network cabinet, which solves the above-mentioned problems existing in the prior art during use.

[0006] The technical solution of the utility model is achieved in this way:

[0007] A compact ring network cabinet comprises a cabinet body and a cabinet door, wherein a circuit breaker and an isolating switch are arranged in the cabinet body, wherein the cabinet door is composed of a first door panel, a second door panel, a third door panel and a fourth door panel which are arranged in a longitudinal direction and connected to each other, wherein a U-shaped guide plate is fixedly connected to each of two sides of the cabinet door at an opening end of the cabinet body, wherein the upper end of the first door panel is rotatably connected to a groove of the guide plate and the lower end is connected to the upper end of the second door panel through a first hinge, the lower end of the second door panel is connected to the upper end of the third door panel through a second hinge, the lower end of the third door panel is connected to the fourth door panel through a third hinge, and the first hinge and the third hinge are connected to each other. The rotating shaft of the first hinge is located on the inner side of the cabinet door, and the rotating shaft of the second hinge is located on the outer side of the cabinet door. The two sides of the lower end of the second door panel, the two sides of the upper end of the third door panel and the two sides of the lower end of the fourth door panel are respectively fixedly connected with a first guide rod, a second guide rod and a third guide rod located in the groove of the guide plate. A locking rod passing through the third guide rod is slidably arranged on the inner side of the fourth door panel, and a sliding groove located on one side of the end of the locking rod is provided on the fourth door panel. A toggle plate passing through the sliding groove is fixedly connected to the end of the locking rod, and a first locking hole and a second locking hole matching the locking rod and distributed up and down are provided on the guide plate.

[0008] Preferably, a connecting pile is fixedly connected to each of the two sides of the upper end of the first door panel in the groove of the guide plate, and a connecting pin screwed into the connecting pile is passed through the first door panel.

[0009] Preferably, the first guide rod and the second guide rod are sleeved with ball bearings that match the groove of the guide plate and are located in the groove of the guide plate.

[0010] Preferably, a first sealing strip is fixedly connected to the lower end surface of the first door panel and the upper end surface of the second door panel, a second sealing strip is fixedly connected to the lower end surface of the second door panel and the upper end surface of the third door panel, and a third sealing strip is fixedly connected to the lower end surface of the third door panel and the upper end surface of the fourth door panel.

[0011] Preferably, a sliding seat is fixedly connected to the inner side surface of the fourth door panel, the locking rod is penetrated through the sliding seat and the locking rod is fixedly connected to a spring seat located on the side of the sliding seat away from the sliding groove, and the locking rod is sleeved with a spring located between the sliding seat and the spring seat.

[0012] Preferably, two locking rods are symmetrically arranged on the fourth door panel, and correspondingly, two sliding seats, sliding grooves and springs are also symmetrically arranged respectively, and a handle located between the two sliding grooves is fixedly connected to the outer side surface of the fourth door panel.

[0013] Preferably, a limiting plate located below the fourth door panel is fixedly connected between the lower ends of the two guide plates, and a buffer pad layer is fixedly connected to the upper surface of the limiting plate.

[0014] To sum up, the beneficial effect of the utility model is that when the cabinet door is opened, the first door panel, the second door panel, the third door panel and the fourth door panel are folded and located on the upper side of the opening end of the cabinet body. Therefore, the cabinet door will not block the opening end of the adjacent ring network cabinet after opening, so that several ring network cabinets arranged side by side have a larger operating space when the cabinet door is opened for maintenance, thereby facilitating maintenance operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the cabinet door in the utility model;

[0019] Figure 4 This is an exploded schematic diagram of the cabinet door in the utility model;

[0020] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0021] Figure 6 This is a schematic diagram of the structure of the fourth door panel in the utility model;

[0022] Figure 7 It is a structural schematic diagram of the cabinet door in the utility model in an open state.

[0023] In the figure: 1. cabinet body; 2. cabinet door; 21. first door panel; 211. connecting pin; 22. second door panel; 221. first guide rod; 23. third door panel; 231. second guide rod; 24. fourth door panel; 241. third guide rod; 242. locking rod; 2421. spring seat; 243. toggle plate; 244. sliding seat; 245. spring; 246. handle; 247. sliding groove; 25. first hinge; 26. second hinge; 27. third hinge; 28. ball bearing; 3. circuit breaker; 4. isolating switch; 5. guide plate; 51. first locking hole; 52. second locking hole; 53. connecting pile; 6. first sealing strip; 7. second sealing strip; 8. third sealing strip; 9. limit plate; 10. buffer layer. DETAILED DESCRIPTION

[0024] The following will be combined with the attached embodiment of the utility model Figure 1-7 , the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] As shown in the figure, a compact ring network cabinet comprises a cabinet body 1 and a cabinet door 2, wherein a circuit breaker 3 and an isolating switch 4 are arranged in the cabinet body 1, and the cabinet door 2 is composed of a first door panel 21, a second door panel 22, a third door panel 23 and a fourth door panel 24 arranged in a longitudinal direction, and a U-shaped guide plate 5 is fixedly connected to each side of the cabinet door 2 at the opening end of the cabinet body 1, the upper end of the first door panel 21 is rotatably connected to the groove of the guide plate 5, and the lower end is connected to the upper end of the second door panel 22 through a first hinge 25, the lower end of the second door panel 22 is connected to the upper end of the third door panel 23 through a second hinge 26, and the lower end of the third door panel 23 is connected to the fourth door panel 24 through a third hinge 27, and the rotating shafts of the first hinge 25 and the third hinge 27 are connected to the fourth door panel 24. Located on the inner side of the cabinet door 2, the rotating shaft of the second hinge 26 is located on the outer side of the cabinet door 2, and the two sides of the lower end of the second door panel 22, the two sides of the upper end of the third door panel 23 and the two sides of the lower end of the fourth door panel 24 are respectively fixedly connected with a first guide rod 221, a second guide rod 231 and a third guide rod 241 located in the groove of the guide plate 5, a locking rod 242 passing through the third guide rod 241 is slidably arranged on the inner side of the fourth door panel 24, and a sliding groove 247 located on one side of the end of the locking rod 242 is opened on the fourth door panel 24, and a toggle plate 243 passing through the sliding groove 247 is fixedly connected to the end of the locking rod 242, and a first locking hole 51 and a second locking hole 52 matching the locking rod 242 and distributed up and down are opened on the guide plate 5.

[0026] Specifically, the upper end of the first door panel 21 is rotatably connected to the structure in the groove of the guide plate 5:

[0027] The groove of the guide plate 5 is located on both sides of the upper end of the first door panel 21, and a connecting pile 53 is fixedly connected thereto. The first door panel 21 is provided with a connecting pin 211 screwed into the connecting pile 53. The cooperation between the connecting pin 211 and the connecting pile 53 realizes the rotational connection between the first door panel 21 and the guide plate 5. Through the above method, when assembling the first door panel 21, the second door panel 22, the third door panel 23 and the fourth door panel 24, the first guide rod 221, the second guide rod 231 and the third guide rod 241 can be slid from the lower end of the groove of the guide plate 5 into the groove of the guide plate 5, and then the connecting pin 211 can be screwed into the connecting pile 53 to fix the first door panel 21, thereby facilitating the assembly of the cabinet door 2.

[0028] In the above embodiment, the first door panel 21 and the second door panel 22 can be swung to the inner side surfaces facing each other through the action of the first hinge 25, the second door panel 22 and the third door panel 23 can be swung to the outer side surfaces facing each other through the action of the second hinge 26, and the third door panel 23 and the fourth door panel 24 can be swung to the inner side surfaces facing each other through the action of the third hinge 27. When closing the cabinet door 2, the second door panel 22, the third door panel 23 and the fourth door panel 24 slide downwardly through the downward sliding of the first guide rod 221, the second guide rod 231 and the third guide rod 241 in the groove of the guide plate 5, and during the sliding process, the first door panel 21, the second door panel 22, the third door panel 23 and the fourth door panel 24 swing to the positions where the end surfaces face each other to form the cabinet door 2 (such as Figure 3 As shown in the figure, at this time, the locking rod 242 is aligned with the second locking hole 52, and the cabinet door 2 can be locked by sliding the toggle plate 243 in the sliding groove 247 to drive the locking rod 242 to be inserted into the second locking hole 52. When the cabinet door 2 is opened, the toggle plate 243 is toggled to drive the locking rod 242 to be pushed out of the second locking hole 52, and the fourth door panel 24 is pushed upward to drive the third door panel 23 and the second door panel 22 to slide upward. During the sliding process, the first door panel 21, the second door panel 22, the third door panel 23 and the fourth door panel 24 swing to the relative positions of the inner side surface or the outer side surface to form a folded state (as shown in the figure). Figure 7 As shown), at this time, the locking rod 242 is aligned with the first locking hole 51, and the cabinet door 2 can be kept in the open state by moving the toggle plate 243 to drive the locking rod 242 to be inserted into the first locking hole 51. Through the above-mentioned structure and method, since the cabinet door 2 is in the open state, it is folded and located on the upper side of the open end of the cabinet body 1, the cabinet door 2 will not block the open end of the adjacent ring network cabinet after opening, so that several ring network cabinets arranged side by side have a larger operating space when the cabinet door 2 is opened for maintenance, thereby facilitating maintenance operations.

[0029] Preferably, the first guide rod 221 and the second guide rod 231 are provided with ball bearings 28 that match the groove of the guide plate 5 and are located in the groove of the guide plate 5. The ball bearings 28 make the first guide rod 221 and the second guide rod 231 slide more stably and smoothly in the groove of the guide plate 5, thereby making the second door panel 22 and the third door panel 23 slide more stably and smoothly when closing or opening the cabinet door 2, that is, making the closing and opening process of the cabinet door 2 more stable and smooth.

[0030] Preferably, a first sealing strip 6 is fixedly connected to the lower end surface of the first door panel 21 and the upper end surface of the second door panel 22, a second sealing strip 7 is fixedly connected to the lower end surface of the second door panel 22 and the upper end surface of the third door panel 23, and a third sealing strip 8 is fixedly connected to the lower end surface of the third door panel 23 and the upper end surface of the fourth door panel 24. When the cabinet door 2 is closed, the end surfaces of the first door panel 21, the second door panel 22, the third door panel 23 and the fourth door panel 24 are opposite to each other, so that the two first sealing strips 6, the two second sealing strips 7 and the two third sealing strips 8 are respectively fitted in pairs, thereby eliminating the gap between the end surfaces of the first door panel 21, the second door panel 22, the third door panel 23 and the fourth door panel 24 when the cabinet door 2 is closed, thereby enhancing the sealing of the cabinet door 2 when it is closed.

[0031] Furthermore, a sliding seat 244 is fixedly connected to the inner side surface of the fourth door panel 24, the locking rod 242 is penetrated by the sliding seat 244 and a spring seat 2421 is fixedly connected to the locking rod 242 and is located on the side of the sliding seat 244 away from the sliding groove 247, and a spring 245 is sleeved on the locking rod 242 and is located between the sliding seat 244 and the spring seat 2421.

[0032] Specifically, two locking rods 242 are symmetrically arranged on the fourth door panel 24 , and correspondingly, two sliding seats 244 , sliding grooves 247 and springs 245 are also symmetrically arranged respectively. A handle 246 located between the two sliding grooves 247 is fixedly connected to the outer side surface of the fourth door panel 24 .

[0033] In the above preferred embodiment, when the cabinet door 2 is closed or opened and the locking rod 242 is aligned with the second locking hole 52 or the second locking hole 52, the locking rod 242 is automatically inserted into the second locking hole 52 or the first locking hole 51 under the action of the spring 245, so that when closing the cabinet door 2, it is only necessary to hold the handle 246 and simultaneously push the two push plates 243 inward, and the first door panel 21, the second door panel 22, the third door panel 23 and the fourth door panel 24 can slide downward and unfold and lock under the action of gravity. When opening the cabinet door 2, it is only necessary to hold the handle 246 and simultaneously push the two push plates 243 inward to push the fourth door panel 24, the third door panel 23, the second door panel 22 and the first door panel 21 upward to slide, fold and lock, thereby making the closing and opening operations of the cabinet door 2 easier and quicker.

[0034] Preferably, a limit plate 9 located below the fourth door panel 24 is fixedly connected between the lower ends of the two guide plates 5, and a buffer layer 10 is fixedly connected to the upper end surface of the limit plate 9. After the cabinet door 2 is closed and the first door panel 21, the second door panel 22, the third door panel 23 and the fourth door panel 24 slide downward and unfold, the buffer layer 10 has a buffering and limiting effect on the sliding of the fourth door panel 24, while reducing the noise when the cabinet door 2 is closed, ensuring that the locking rod 242 can be aligned with the second locking hole 52 to achieve the locking of the cabinet door 2.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A compact ring main unit, comprising a cabinet body (1) and a cabinet door (2), wherein a circuit breaker (3) and an isolating switch (4) are arranged in the cabinet body (1), characterized in that: The cabinet door (2) is composed of a first door panel (21), a second door panel (22), a third door panel (23) and a fourth door panel (24) which are arranged in a longitudinal direction and connected to each other. A U-shaped guide plate (5) is fixedly connected to each side of the cabinet door (2) at the opening end of the cabinet body (1). The upper end of the first door panel (21) is rotatably connected to a groove of the guide plate (5) and the lower end is connected to the upper end of the second door panel (22) via a first hinge (25). The lower end of the second door panel (22) is connected to the upper end of the third door panel (23) via a second hinge (26). The lower end of the third door panel (23) is connected to the fourth door panel (24) via a third hinge (27). The rotation axes of the first hinge (25) and the third hinge (27) are located on the inner side of the cabinet door (2). The rotation axis of the second hinge (26) is located on the inner side of the cabinet door (2). On the outside of the cabinet door (2), a first guide rod (221), a second guide rod (231) and a third guide rod (241) located in a groove of the guide plate (5) are fixedly connected to the two sides of the lower end of the second door panel (22), the two sides of the upper end of the third door panel (23) and the two sides of the lower end of the fourth door panel (24), respectively; a locking rod (242) passing through the third guide rod (241) is slidably arranged on the inner side of the fourth door panel (24), and a sliding groove (247) located on one side of the end of the locking rod (242) is provided on the fourth door panel (24); a toggle plate (243) passing through the sliding groove (247) is fixedly connected to the end of the locking rod (242); and a first locking hole (51) and a second locking hole (52) matching the locking rod (242) and distributed up and down are provided on the guide plate (5).

2. A compact ring main unit according to claim 1, characterized in that: A connecting pile (53) is fixedly connected to each of the two sides of the upper end of the first door panel (21) in the groove of the guide plate (5), and a connecting pin (211) screwed into the connecting pile (53) is passed through the first door panel (21).

3. A compact ring main unit according to claim 1, characterized in that: The first guide rod (221) and the second guide rod (231) are sleeved with ball bearings (28) that match the groove of the guide plate (5) and are located in the groove of the guide plate (5).

4. A compact ring main unit according to claim 1, characterized in that: A first sealing strip (6) is fixedly connected to the lower end surface of the first door panel (21) and the upper end surface of the second door panel (22), a second sealing strip (7) is fixedly connected to the lower end surface of the second door panel (22) and the upper end surface of the third door panel (23), and a third sealing strip (8) is fixedly connected to the lower end surface of the third door panel (23) and the upper end surface of the fourth door panel (24).

5. The compact ring main unit according to claim 1, characterized in that: A sliding seat (244) is fixedly connected to the inner side surface of the fourth door panel (24); the locking rod (242) is inserted through the sliding seat (244) and a spring seat (2421) is fixedly connected to the locking rod (242) and is located on a side of the sliding seat (244) away from the sliding groove (247); and a spring (245) is sleeved on the locking rod (242) and is located between the sliding seat (244) and the spring seat (2421).

6. A compact ring main unit according to claim 5, characterized in that: Two locking rods (242) are symmetrically arranged on the fourth door panel (24), and correspondingly, two sliding seats (244), sliding grooves (247) and springs (245) are also symmetrically arranged respectively. A handle (246) located between the two sliding grooves (247) is fixedly connected to the outer side surface of the fourth door panel (24).

7. The compact ring main unit according to claim 5, characterized in that: A limit plate (9) located below the fourth door panel (24) is fixedly connected between the lower ends of the two guide plates (5), and a buffer pad layer (10) is fixedly connected to the upper end surface of the limit plate (9).

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