Ring main unit secondary cell with double-layer door structure

Abstract

The utility model discloses a ring main unit secondary cell with a double-layer door structure, which relates to the technical field of high-voltage ring main units and comprises a secondary cell body, an inner layer door is arranged at one end inside the secondary cell body, the secondary cell body is connected with the inner layer door through an inner layer door hinge, an outer layer door is arranged at one end outside the secondary cell body, and the outer layer door is connected with the inner layer door through an outer layer door hinge. The secondary cell body is connected with the outer-layer door through an outer-layer door hinge; the bottoms of the inner-layer door and the outer-layer door are connected with the secondary cell body through positioning assemblies; and a plurality of travel switches are arranged on one side in the secondary cell body. The fixing plate and the positioning connecting rod are arranged in the secondary cell body, and the positioning supporting plates are arranged on the outer layer door and the inner layer door, so that the opening angle of the door plate is larger than or equal to 120 degrees, the door plate can be fixed at a certain position, and convenience is provided for operation and maintenance personnel.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage ring network cabinets, in particular to a secondary chamber of a ring network cabinet with a double-layer door structure. Background Art

[0002] The secondary chamber of the ring main unit refers to the part inside the ring main unit for placing control, protection and monitoring equipment. These devices usually include relay protection devices, measuring instruments, communication equipment, etc. They together constitute the "brain" of the ring main unit and are responsible for executing and monitoring the operation of the power grid. The secondary chamber of the ring main unit is installed on the top of the ring main unit operating mechanism room. There are many types of secondary chambers of the ring main unit, including single-layer door structure and double-layer door mechanism.

[0003] For example, Chinese patent CN220909483U discloses a double-door secondary box structure, including a side panel 1, a top panel, a side panel 2, a bottom panel and a back panel assembled and installed on the secondary box; a double door assembly connected by a door hinge piece 1, a door hinge piece 2 and a hinge shaft is installed at the opening of the secondary box, and a lock assembly is installed on the double door assembly, and the double door assembly includes an inner sealing door and an outer sealing door, and the inner sealing door is installed on the inner side of the secondary box opening by a door hinge piece 1. The double-door secondary box structure has the advantages of being easy to disassemble and store, but the double-door secondary box structure still has the following defects when in use:

[0004] 1) There is no foam strip on the door panel of the secondary chamber, which cannot meet the IP55 protection level;

[0005] 2) The opening angle of the secondary compartment door is small and lacks positioning support. During on-site operation and maintenance, the secondary compartment door panel may be affected by wind force or the stress of the secondary wiring harness in the secondary compartment door, and the secondary compartment door panel cannot be positioned in a fixed position;

[0006] 3) Lack of modular design: The secondary compartment of the ring main unit is equipped with current terminals, voltage terminals, miniature circuit breakers and various wiring terminals. One end of the secondary control line, signal line and the control and signal line of the current transformer / voltage transformer is connected to the terminal, and the other end is led to the mechanism room through the wire hole on the bottom plate of the secondary compartment, making the assembly and replacement operations not convenient enough, and modular operation cannot be realized, and independent disassembly and assembly cannot be achieved.

[0007] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0008] 1. Technical issues to be solved

[0009] In view of the deficiencies in the prior art, the utility model provides a secondary chamber of a ring main unit with a double-layer door structure, which has the advantages of modular design, thereby solving the problem that modular operation cannot be achieved in the prior art.

[0010] (II) Technical solution

[0011] In order to achieve the advantages of the above modular design, the specific technical solutions adopted by the utility model are as follows:

[0012] A secondary chamber of a ring main unit with a double-door structure comprises a secondary chamber body, an inner door is arranged at one inner end of the secondary chamber body, and the secondary chamber body and the inner door are connected through an inner door hinge, an outer door is arranged at one outer end of the secondary chamber body, and the secondary chamber body and the outer door are connected through an outer door hinge; the bottoms of the inner door and the outer door are connected to the secondary chamber body through a positioning assembly; a plurality of travel switches are arranged on one inner side of the secondary chamber body, a secondary chamber brow is arranged at one top end of the secondary chamber body, a nameplate is arranged on the outer side wall of the secondary chamber brow, and an aviation plug assembly is arranged at the other top end of the secondary chamber body.

[0013] Furthermore, in order to provide a foam strip on the outer door, the center position of the foam strip is aligned with the bending of the surrounding panels inside the secondary chamber body. When the outer door is closed, the foam strip on the outer door tightly presses the bending of the surrounding panels, thereby meeting the IP55 protection level. An observation window is provided at one end of the outer side of the outer door, and the observation window and the outer door are connected by a number of fixing bolts, and a foam strip is provided on the inner top of the outer door.

[0014] Furthermore, in order to enhance the protective measures and provide an additional level of safety under the cooperation of the door lock and the lock tongue, and at the same time, under the cooperation of the inner door hinge and the outer door hinge, allow the door panel to rotate smoothly on a fixed axis, thereby reducing structural damage caused by improper operation, a plurality of door locks are arranged on the outer side of the inner door and the outer door, and a plurality of lock tongues are arranged on the side of the inner door and the outer door away from the door lock; an inner door left side limit plate cooperating with the inner door is arranged on one side of the interior of the secondary chamber body, an inner door top limit plate cooperating with the inner door is arranged on the inner top of the secondary chamber body, and an inner door cooperating with the inner door is arranged on the other side of the interior of the secondary chamber body. A right side limit plate of the inner door, an inner bottom of the secondary chamber body is provided with an inner door bottom limit plate matched with the inner door, the inner door hinge includes an inner door fixed hinge arranged on the side of the left side limit plate of the inner door, one side of the inner door fixed hinge is provided with an inner door rotating hinge connected to the inner door, the inner door fixed hinge and the inner door rotating hinge are connected through the inner door hinge rotating shaft, the outer door hinge includes a plurality of fixed blocks 1 arranged on one side of the secondary chamber body, fixed blocks 2 connected to the outer door are arranged between the fixed blocks 1, the fixed blocks 1 and the fixed blocks 2 are connected through the outer door hinge rotating shaft, and mounting holes are opened inside the fixed blocks 1 and the fixed blocks 2.

[0015] Furthermore, in order to set a fixing plate and a positioning connecting rod inside the secondary chamber body, and set a positioning support plate on the outer door and the inner door, it is ensured that the opening angle of the door panel is greater than or equal to 120°, and the door panel can be fixed in a certain position to provide convenience for operation and maintenance personnel. At the same time, the secondary chamber provided by the utility model adopts a double-door structure design, which not only improves the safety protection level, but also improves the stability and service life of the equipment. The positioning assembly includes positioning plates that are arranged on one side of the bottom of the inner door and the outer door, and a plurality of mounting holes are opened on the top of the positioning plate. The interior of the mounting hole is connected to the positioning connecting rod through a rotating shaft, and a fixing plate connected to the bottom of the secondary chamber body is arranged at the end of the positioning connecting rod away from the mounting hole.

[0016] Furthermore, in order to provide aviation plugs at the top and bottom of the secondary chamber body and install them in a plug-in manner, which not only saves assembly time but also avoids wiring errors, the aviation plug assembly includes a twenty-six-core aviation plug one arranged at one end of the top of the secondary chamber body, and a six-core aviation plug and an Ethernet aviation plug are arranged in sequence at the other end of the top of the secondary chamber body; an aviation plug fixing plate is arranged at the inner bottom of the secondary chamber body, and a twenty-six-core aviation plug two is arranged on the top of the aviation plug fixing plate.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a secondary chamber of a ring main unit with a double-layer door structure, which has the following beneficial effects:

[0019] (1) The secondary chamber of the ring main unit provided by the utility model is provided with a foam strip on the outer door, and the center position of the foam strip is aligned with the bending part of the surrounding panels inside the secondary chamber body. When the outer door is closed, the foam strip on the outer door tightly presses the bending part of the surrounding panels, and the inner door adopts a mosaic structure design, thereby meeting the IP55 protection level.

[0020] (2) The utility model arranges a fixing plate and a positioning connecting rod inside the secondary chamber body, and arranges positioning support plates on the outer door and the inner door, thereby ensuring that the door panel opening angle is greater than or equal to 120°, and the door panel can be fixed in a certain position, providing convenience for operation and maintenance personnel. At the same time, the secondary chamber provided by the utility model adopts a double-door structure design, which not only improves the safety protection level, but also improves the stability and service life of the equipment.

[0021] (3) The utility model provides a secondary chamber header on the top of the secondary chamber body, and a nameplate on the secondary chamber header to facilitate identification of the equipment identification information, and provides an LED lighting lamp inside the secondary chamber body, and a travel switch is provided on the right door frame of the outer door and the inner door. When the outer door and the inner door are opened, the LED lighting lamp lights up, providing convenience for operation and maintenance personnel to inspect and repair.

[0022] (4) The utility model adopts a modular design of the secondary chamber, and the secondary line adopts the form of aviation plug-in, so that aviation plugs are set on the top and bottom of the secondary chamber body and installed by plug-in, which not only saves assembly time, but also can avoid wiring errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 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 work.

[0024] Figure 1 It is a structural schematic diagram of a secondary chamber of a ring main unit with a double-layer door structure according to an embodiment of the utility model;

[0025] Figure 2 It is a structural schematic diagram of a secondary chamber of a ring main unit with a double-layer door structure according to an embodiment of the utility model when the outer door is opened;

[0026] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0027] Figure 4 It is a structural schematic diagram of the outer door and the inner door of the secondary chamber of the ring main unit with a double-layer door structure according to an embodiment of the utility model when they are opened;

[0028] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0029] Figure 6 It is a structural schematic diagram of another angle when the outer door and the inner door of the secondary chamber of the ring main unit with a double-layer door structure according to an embodiment of the utility model are opened;

[0030] Figure 7 It is a structural schematic diagram of the inner door in the secondary chamber of the ring main unit with a double-layer door structure according to an embodiment of the utility model;

[0031] Figure 8 It is a structural schematic diagram of the inner door hinge in the secondary chamber of the ring main unit with a double-layer door structure according to an embodiment of the utility model.

[0032] In the figure:

[0033] 1. Secondary chamber body; 2. Inner door; 3. Inner door hinge; 301. Inner door fixed hinge; 302. Inner door rotating hinge; 303. Inner door hinge shaft; 4. Outer door; 5. Outer door hinge; 501. Fixed block 1; 502. Fixed block 2; 503. Outer door hinge shaft; 6. Positioning assembly; 601. Positioning plate; 602. Mounting hole; 603. Positioning connecting rod; 604. Fixed plate; 7. Secondary chamber brow; 8. Nameplate; 9. Aviation plug assembly; 901. Twenty Six-core aviation plug one; 902, six-core aviation plug; 903, Ethernet aviation plug; 904, aviation plug fixing plate; 905, twenty-six-core aviation plug two; 10, observation window; 11, fixing bolt; 12, door lock; 13, lock tongue; 14, left limit plate of inner door; 15, top limit plate of inner door; 16, right limit plate of inner door; 17, foam strip; 18, travel switch; 19, top bent plate; 20, right bent plate; 21, bottom bent plate; 22, left bent plate; 23, bottom limit plate of inner door. DETAILED DESCRIPTION

[0034] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0035] According to an embodiment of the utility model, a secondary chamber of a ring main unit with a double-layer door structure is provided.

[0036] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-Figure 8 As shown, the secondary chamber of the ring main unit with a double-door structure according to the embodiment of the utility model includes a secondary chamber body 1, an inner door 2 is arranged at one end of the interior of the secondary chamber body 1, and the secondary chamber body 1 and the inner door 2 are connected by an inner door hinge 3, an outer door 4 is arranged at one end of the exterior of the secondary chamber body 1, and the secondary chamber body 1 and the outer door 4 are connected by an outer door hinge 5; the bottoms of the inner door 2 and the outer door 4 are connected to the secondary chamber body 1 through a positioning assembly 6; a plurality of travel switches 18 are arranged on one side of the interior of the secondary chamber body 1, a secondary chamber brow 7 is arranged at one end of the top of the secondary chamber body 1, a nameplate 8 is arranged on the outer wall of the secondary chamber brow 7, and an aviation plug assembly 9 is arranged at the other end of the top of the secondary chamber body 1.

[0037] With the aid of the above scheme, the secondary chamber of the ring main unit provided by the utility model is provided with a foam strip 17 on the outer door 4, and the center position of the foam strip 17 is aligned with the bending part of the surrounding panels inside the secondary chamber body 1. When the outer door 4 is closed, the foam strip 17 on the outer door 4 tightly presses the bending part of the surrounding panels, and the inner door 2 adopts a mosaic structure design, thereby meeting the IP55 protection level.

[0038] In one embodiment, for the above-mentioned outer door 4, an observation window 10 is provided at one end of the outer side of the outer door 4, and the observation window 10 is connected to the outer door 4 by a plurality of fixing bolts 11, and a foam strip 17 is provided at the inner top of the outer door 4, so that by providing the foam strip 17 on the outer door 4, the center position of the foam strip 17 is aligned with the bending part of the surrounding panels inside the secondary chamber body 1, when the outer door 4 is closed, the foam strip 17 on the outer door 4 tightly presses the bending part of the surrounding panels, thereby meeting the IP55 protection level.

[0039] In one embodiment, for the above-mentioned inner door 2, a plurality of door locks 12 are provided on the outer side of the inner door 2 and the outer door 4, and a plurality of lock tongues 13 are provided on the side of the inner door 2 and the outer door 4 away from the door lock 12; an inner door left side limit plate 14 matching with the inner door 2 is provided on the inner side of the secondary chamber body 1, an inner door top limit plate 15 matching with the inner door 2 is provided on the inner top of the secondary chamber body 1, an inner door right side limit plate 16 matching with the inner door 2 is provided on the other side of the interior of the secondary chamber body 1, an inner door bottom limit plate 23 matching with the inner door 2 is provided on the inner bottom of the secondary chamber body 1, the inner door hinge 3 includes an inner door fixed hinge 301 arranged on one side of the inner door left side limit plate 14, and a inner door fixed hinge 301 is provided on one side thereof. The inner door rotating hinge 302 is connected to the layer door 2, the inner door fixed hinge 301 is connected to the inner door rotating hinge 302 through the inner door hinge shaft 303, the outer door hinge 5 includes a plurality of fixed blocks 501 arranged on one side of the secondary chamber body 1, and fixed blocks 502 connected to the outer door 4 are arranged between the fixed blocks 1 501, and the fixed blocks 1 501 and the fixed blocks 2 502 are connected through the outer door hinge shaft 503, and mounting holes are provided inside the fixed blocks 1 501 and the fixed blocks 2 502, thereby enhancing the protection measures under the cooperation of the door lock 12 and the lock tongue 13, providing an additional level of safety, and at the same time, under the cooperation of the inner door hinge 3 and the outer door hinge 5, the door panel is allowed to rotate smoothly on the fixed axis, reducing structural damage caused by improper operation.

[0040] It should be noted that the inner door 2 adopts an inlaid structure design to meet the IP55 protection level. The frame around the inner door 2 is composed of an inner door left limit plate 14, an inner door top limit plate 15, an inner door right limit plate 16, and an inner door bottom limit plate 23. The inner door right limit plate 16 is provided with a travel switch wire hole.

[0041] like Figure 2 As shown, the secondary chamber body 1 includes a top bent plate 19, a right bent plate 20, a bottom bent plate 21 and a left bent plate 22. The left limit plate 14 of the inner door is fixed to the left bent plate 22 by screws, the top limit plate 15 of the inner door is fixed to the top bent plate 19 by screws, the right limit plate 16 of the inner door is fixed to the right bent plate 20 by screws, the bottom limit plate 23 of the inner door is fixed to the bottom bent plate 21 by screws, and the bottom aviation plug fixing plate 29 is fixed to the bottom bent plate 21 by screws; the outer door 4 is fixed to the left bent plate 22 on the secondary chamber body 1 by the outer door hinge 5.

[0042] In one embodiment, for the above-mentioned positioning assembly 6, the positioning assembly 6 includes a positioning plate 601 which is arranged on one side of the bottom of the inner door 2 and the outer door 4, and a plurality of mounting holes 602 are opened on the top of the positioning plate 601. The interior of the mounting hole 602 is connected to the positioning link 603 through a rotating shaft, and the end of the positioning link 603 away from the mounting hole 602 is provided with a fixing plate 604 connected to the bottom of the secondary chamber body 1, so that the fixing plate 604 and the positioning link 603 are arranged inside the secondary chamber body 1, and the positioning plate 601 is arranged on the outer door 4 and the inner door 2, to ensure that the opening angle of the door panel is greater than or equal to 120°, and the door panel can be fixed in a certain position, providing convenience for operation and maintenance personnel. At the same time, the secondary chamber provided by the utility model adopts a double-door structure design, which not only improves the safety protection level, but also improves the stability and service life of the equipment.

[0043] In one embodiment, for the above-mentioned aviation plug assembly 9, the aviation plug assembly 9 includes a twenty-six-core aviation plug 1 901 arranged at one end of the top of the secondary chamber body 1, and a six-core aviation plug 902 and an Ethernet aviation plug 903 are arranged in sequence at the other end of the top of the secondary chamber body 1; an aviation plug fixing plate 904 is arranged at the inner bottom of the secondary chamber body 1, and a twenty-six-core aviation plug 2 905 is arranged on the top of the aviation plug fixing plate 904, so that aviation plugs are arranged on the top and bottom of the secondary chamber body 1 and installed in a plug-in manner, which not only saves assembly time, but also can avoid wiring errors.

[0044] It should be noted that one end of the 26-core aviation plug 905 is connected to the terminal block in the secondary chamber body 1, and the other end is connected to the mechanism room of the ring network cabinet through the aviation plug cable; one end of the 26-core aviation plug 901 is connected to the terminal block in the secondary chamber body 1, and the other end is connected to other cabinets; the structural design of the aviation plug is adopted for modular production, which is simple to assemble, saves labor time, and reduces wiring errors.

[0045] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0046] In actual application, when it is necessary to inspect the interior of the secondary chamber of the ring main unit:

[0047] (1) Open the outer door 4:

[0048] Open the door lock 12 on the outer door 4, rotate it 90° counterclockwise to open it, and open the outer door 4 to the left. After the outer door 4 is opened, the travel switch 18 on the right curved plate is triggered, and the LED lighting in the secondary chamber body 1 is lit. When it is opened to a certain angle, take out the positioning connecting rod 603 of the outer door 4 and rotate it to the left. There are fixing studs on the positioning connecting rod 603 of the outer door 4. Insert the studs into the mounting holes 602 on the outer door 4 on the outer door 4 to fix the outer door 4 in a certain position.

[0049] (2) Open inner door 2:

[0050] Open the door lock 12 on the inner door 2, rotate it 90° counterclockwise to open it, and open the inner door 2 to the left. After the inner door 2 is opened, when it is opened to a certain angle, take out the positioning connecting rod 603 of the inner door 2 and rotate it to the left. There are fixing studs on the positioning connecting rod 603 of the inner door 2. Insert the studs into the mounting holes 602 on the inner door 2 to fix the inner door 2 in a certain position.

[0051] When the door of the secondary compartment of the ring main unit is closed after internal inspection:

[0052] (1) Close the inner door 2:

[0053] Take out the fixing stud on the positioning link 603 of the inner door 2 and rotate it to the right, and insert the stud into the hole on the fixing plate. At this time, the limit is released, close the inner door 2, and then rotate the door lock 12 on the inner door 2 90° clockwise. The lock tongue 13 is stuck in the inner limit plate 16 on the right side of the inner door, and the inner door 2 is locked.

[0054] (2) Close the outer door 4:

[0055] Take out the fixing stud on the positioning link 603 of the outer door 4 and rotate it to the right, insert the stud into the hole on the fixing plate 604, then the limit is released, close the outer door 4, and then rotate the door lock 12 on the outer door 4 90° clockwise, the lock tongue 13 of the outer door 4 is stuck in the right curved plate, the outer door 4 is locked, and the inspection is completed.

[0056] In summary, with the aid of the above technical solution of the utility model, the secondary chamber of the ring main unit provided by the utility model is provided with a foam strip 17 on the outer door 4, and the center position of the foam strip 17 is aligned with the bending part of the surrounding panels inside the secondary chamber body 1. When the outer door 4 is closed, the foam strip 17 on the outer door 4 tightly presses the bending part of the surrounding panels, and the inner door 2 adopts a mosaic structure design, thereby meeting the IP55 protection level; the utility model is provided with a fixing plate 604 and a positioning connecting rod 603 inside the secondary chamber body 1, and a positioning plate 601 is provided on the outer door 4 and the inner door 2, so as to ensure that the door panel opening angle is greater than or equal to 120°, and the door panel can be fixed in a certain position, which provides convenience for operation and maintenance personnel. At the same time, the secondary chamber provided by the utility model The double-door structure design of the small room not only improves the safety protection level, but also improves the stability and service life of the equipment. The utility model sets a secondary room brow 7 on the top of the secondary room body 1, and sets a nameplate 8 on the secondary room brow 7 to facilitate the identification of the equipment identification information, and sets an LED light inside the secondary room body 1, and a travel switch 18 is set at the right door frame of the outer door 4 and the inner door 2. When the outer door 4 and the inner door 2 are opened, the LED light is on, which provides convenience for the operation and maintenance personnel to inspect and repair. The utility model adopts a modular design of the secondary room, and the secondary line adopts the form of aviation plug connection, so that aviation plugs are set on the top and bottom of the secondary room body 1 and installed in a plug-in manner, which not only saves assembly time, but also can avoid wiring errors.

[0057] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0058] 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 secondary chamber of a ring main unit with a double-layer door structure, comprising a secondary chamber body (1), characterized in that: An inner door (2) is provided at one end of the interior of the secondary chamber body (1), and the secondary chamber body (1) and the inner door (2) are connected via an inner door hinge (3); an outer door (4) is provided at one end of the exterior of the secondary chamber body (1), and the secondary chamber body (1) and the outer door (4) are connected via an outer door hinge (5); The bottoms of the inner door (2) and the outer door (4) are connected to the secondary chamber body (1) via a positioning assembly (6); a plurality of travel switches (18) are arranged on one side of the interior of the secondary chamber body (1); a secondary chamber brow (7) is arranged at one end of the top of the secondary chamber body (1); a nameplate (8) is arranged on the outer wall of the secondary chamber brow (7); and an aviation plug assembly (9) is arranged at the other end of the top of the secondary chamber body (1).

2. According to the double-door structure of the ring main unit secondary chamber of claim 1, it is characterized in that: An observation window (10) is provided at one end of the outer side of the outer door (4), and the observation window (10) is connected to the outer door (4) via a plurality of fixing bolts (11), and a foam strip (17) is provided at the inner top of the outer door (4).

3. The secondary chamber of a ring main unit with a double-layer door structure according to claim 2 is characterized in that: A plurality of door locks (12) are provided on the outer side of the inner door (2) and the outer door (4), and a plurality of lock tongues (13) are provided on the side of the inner door (2) and the outer door (4) away from the door locks (12); An inner door left side limit plate (14) matching with the inner door (2) is arranged on one inner side of the secondary chamber body (1); an inner door top limit plate (15) matching with the inner door (2) is arranged on the inner top of the secondary chamber body (1); an inner door right side limit plate (16) matching with the inner door (2) is arranged on the other inner side of the secondary chamber body (1); and an inner door bottom limit plate (23) matching with the inner door (2) is arranged on the inner bottom of the secondary chamber body (1).

4. The secondary chamber of a ring main unit with a double-layer door structure according to claim 3 is characterized in that: The inner door hinge (3) comprises an inner door fixed hinge (301) arranged on one side of the left limit plate (14) of the inner door, and an inner door rotating hinge (302) connected to the inner door (2) is arranged on one side of the inner door fixed hinge (301), and the inner door fixed hinge (301) and the inner door rotating hinge (302) are connected via an inner door hinge rotating shaft (303).

5. The secondary chamber of a ring main unit with a double-layer door structure according to claim 4 is characterized in that: The outer door hinge (5) includes a plurality of fixed blocks (501) arranged on one side of the secondary chamber body (1), and a fixed block (502) connected to the outer door (4) is arranged between the fixed blocks (501). The fixed block (501) and the fixed block (502) are connected via an outer door hinge shaft (503), and mounting holes are provided inside the fixed block (501) and the fixed block (502).

6. The secondary chamber of a ring main unit with a double-layer door structure according to claim 5 is characterized in that: The positioning assembly (6) includes a positioning plate (601) which is arranged on one side of the bottom of the inner door (2) and the outer door (4), and a plurality of mounting holes (602) are provided on the top of the positioning plate (601). The interior of the mounting holes (602) is connected to a positioning connecting rod (603) via a rotating shaft, and a fixing plate (604) connected to the bottom of the secondary chamber body (1) is provided at one end of the positioning connecting rod (603) away from the mounting holes (602).

7. The secondary chamber of a ring main unit with a double-layer door structure according to claim 6 is characterized in that: The aviation plug assembly (9) comprises a twenty-six-core aviation plug one (901) arranged at one end of the top of the secondary chamber body (1), and a six-core aviation plug (902) and an Ethernet aviation plug (903) are arranged in sequence at the other end of the top of the secondary chamber body (1); an aviation plug fixing plate (904) is arranged at the inner bottom of the secondary chamber body (1), and a twenty-six-core aviation plug two (905) is arranged at the top of the aviation plug fixing plate (904).

Images