Prefabricated metal closed ring main unit convenient to overhaul

Abstract

The invention relates to the technical field of ring main units, in particular to a prefabricated metal closed ring main unit convenient to overhaul, which comprises a box body and four box doors, the front surface of the box body is open and is provided with an inner cavity, the box doors are used for closing the box body, the box doors are divided into two groups, the two groups of box doors are arranged along the width direction of the box body, and the four box doors are arranged in the box body. The two box doors in one group are a first box door and a second box door respectively, the second box door is located on the side, away from the adjacent group of box doors, of the first box door, the first box door can be arranged on the second box door in a sliding mode in the width direction of the box body, and when the first box door slides to be completely opened, the second box door is located on the second box door. The locking assembly is used for locking the first box door to the second box door, the second box door can be rotationally arranged on the box body around a rotating axis extending in the vertical direction, and after the second box door is rotationally opened, the limiting assembly is used for preventing the second box door from being reversely closed.

Description

Technical Field

[0001] The present application relates to the field of ring network boxes, and in particular to a prefabricated metal closed ring network box that is easy to maintain. Background Art

[0002] A ring main unit (RMU) is a crucial power distribution device in power systems, primarily used in 10kV (or 20kV) medium-voltage distribution networks. Its core function is to provide power to the ring main unit and branch cables. The RMU consists of a housing that houses multiple RMUs and a communications cabinet.

[0003] The ring main box includes a box body, in which multiple ring main cabinets and a communication cabinet are installed. The box body is equipped with a door for closing the box body. In the prior art, multiple ring main cabinets are arranged along the width of the box body, and there are four doors in total. The four doors are divided into two groups. The two doors in one group are the first door and the second door. The first door is rotatably mounted on the second door, and the second door is rotatably mounted on the box body. The two groups of doors rotate in opposite directions to open. When inspecting the ring main box, all the doors need to be opened. In this case, the first door needs to be opened first, and then the second door. However, due to the long total width of a group of doors and the high degree of freedom of rotation of the first door, after the doors are fully opened, both the first door and the second door will swing arbitrarily due to external factors (such as strong winds), affecting inspection and maintenance, and the door opening operation is more troublesome. Summary of the Invention

[0004] In order to facilitate the maintenance of the ring network box, the present application provides a pre-assembled metal closed ring network box that is easy to maintain.

[0005] This application provides a prefabricated metal closed ring network box that is easy to maintain, which adopts the following technical solutions: A prefabricated metal closed ring network box for easy maintenance, comprising a box body and four doors, the box body having an opening at the front and an inner cavity, the box doors being used to close the box body, the box doors being divided into two groups, the two groups of doors being arranged along the width direction of the box body, the two doors in one group being respectively a first door and a second door, the second door being located on a side of the first door away from an adjacent group of doors, and further comprising a locking assembly and a limiting assembly, the first door being capable of sliding on the second door along the width direction of the box body, when the first door slides to be fully opened, the locking assembly being used to lock the first door on the second door, the second door being capable of being rotatably arranged on the box body around a rotation axis extending in a vertical direction, when the second door is rotated to open, the limiting assembly being used to prevent the second door from reversing and closing.

[0006] By adopting the above technical solution, when the first door slides to be fully opened, the first door is fixed to the second door relatively by the locking assembly, so that the first door can be opened as the second door rotates, and the second door is limited by the limiting assembly to prevent the second door from reversing and closing; the combined design of the sliding first door and the rotating second door, combined with the locking assembly and the limiting assembly, significantly optimizes the maintenance operation process, the sliding opening operation of the first door is convenient, and when only the first door is opened, the first door is not likely to slide in a strong wind environment, which is convenient for maintenance; if If the second door needs to be opened, the first door is first fixed to the second door so that the first door and the second door become a whole, and then the second door is rotated to open. Since the total width of the first door and the second door is the width of one door (the two doors are stacked together), it will not take up too much space. Finally, the limit assembly is used to prevent the second door from reversing and closing, and at the same time limit the second door and the first door. This structure solves the shaking problem of traditional double-doors due to the large total width and uncontrolled rotational freedom, while reducing the door operation steps and improving maintenance stability and safety.

[0007] Optionally, the locking assembly includes a locking block and a locking slot for inserting the locking block, a telescopic slot is provided on the second box door, the locking block is slidably arranged in the telescopic slot along the depth direction of the box body, the lock slot is provided on the first box door, and a locking elastic member is connected between the locking block and the slot wall of the telescopic slot to enable the locking block to pop out of the telescopic slot and insert into the lock slot, and an inclined guide slope is formed on the surface of the locking block, and the distance between the guide slope and the bottom wall of the telescopic slot increases along the direction in which the first box door slides open, and the first box door is used to slide until it conflicts with the guide slope, pressing the lock block back into the telescopic slot.

[0008] By adopting the above technical solution, when the first door slides open, the first door slides until it conflicts with the guiding inclined surface on the locking block, pressing the locking block back into the telescopic slot, and the first door continues to slide until the lock slot is aligned with the telescopic slot, and the end of the locking block pops out of the telescopic slot under the elastic force of the locking elastic member and inserts into the lock slot, completing the locking of the first door and the second door; the locking assembly adopts the elastic locking block in the telescopic slot to cooperate with the lock slot to realize automatic locking after the first door slides into place, the first door slides into conflict with the guiding inclined surface, and the locking elastic member drives the locking block to insert into the lock slot, and the rigid fixation of the first door and the second door can be completed without manual intervention, effectively preventing the first door from detaching or shaking due to external force (such as wind) during maintenance, enhancing structural reliability, and simplifying the locking operation process.

[0009] Optionally, a fixing component is further included, which is used to lock the second box door on the box body. The fixing component includes a card block and a card slot. A mounting slot is provided on the inner wall of the box body. The card block is slidably arranged in the mounting slot along the width direction of the box body. The card slot is provided on the second box door. The card block includes an insertion portion for inserting into the card slot. A fixed elastic member is connected between the card block and the slot wall of the mounting slot to enable the insertion portion of the card block to pop out of the mounting slot and insert into the card slot.

[0010] By adopting this technical solution, the fixing assembly automatically locks the second door in the closed state by elastically engaging the clamping block in the mounting slot. The fixed elastic member pushes the clamping block into the slot to form a rigid connection, ensuring that the door is firmly protected against external impact when closed, improving the overall protection of the ring network box while avoiding the cumbersome manual operation of traditional door bolts.

[0011] Optionally, when the first door is fully opened, the first door is located on the side of the second door close to the inner cavity of the box body, and the card block also includes an unlocking part, which is located on the side of the insertion part close to the inner cavity of the box body. The first door is used to slide to the interference and push the unlocking part, driving the card block to move to the insertion part to exit the card slot.

[0012] By adopting the above technical solution, when the first door slides open, the unlocking part of the card block is contacted to drive the card block out of the card slot, thereby realizing the synchronous unlocking of the second door; this design integrates the opening action of the first door and the unlocking action of the second door into a single operation (opening the first door can unlock the second door), greatly simplifying the opening process of the front door for maintenance and improving operational efficiency; the unlocking part is located on the side of the insertion part close to the inner cavity of the box body, so that the second door will not interfere with the unlocking part when it is rotated to open, ensuring that the second door can be opened smoothly.

[0013] Optionally, an inclined retraction slope is formed on the surface of the insertion portion away from the unlocking portion, and the distance between the retraction slope and the bottom wall of the installation groove decreases along the arrangement direction of the box body and the box door. The second box door is used to slide against the retraction slope to press the block back into the installation slot.

[0014] By adopting the above technical solution, when the second box door is rotated to close, the second box door rotates to contact the retracted inclined surface, pressing the card block back into the installation slot until the second box door rotates to align the card slot with the installation slot, and the end of the card block pops out of the installation slot and inserts into the card slot under the elastic force of the fixed elastic part; the retracted inclined surface design of the card block enables the card block to be automatically pressed back when the second box door is closed. When the second box door is closed, its edge slides along the inclined surface and pushes the card block back to the installation slot, realizing "contactless" unlocking, avoiding manual alignment operations, and significantly improving the convenience and fault tolerance of door closing.

[0015] Optionally, the limiting assembly includes a ratchet fixed on the second box door and a pawl rotatably set on the box body, the rotation axis of the pawl extends in the vertical direction, a stop groove is formed between two adjacent ratchet teeth of the ratchet, and a stop elastic member is connected between the pawl and the box body to allow the end of the pawl to be inserted into the stop groove.

[0016] By adopting the above technical solution, when the second door is rotated to open, it drives the ratchet to rotate, pushing the pawl to rotate, so that the end of the pawl rotates to exit the anti-retraction groove, and the second door can be smoothly rotated and opened. When the second door is rotated to a suitable angle, the end of the pawl is inserted into the anti-retraction groove under the elastic force of the anti-retraction elastic member, which prevents the ratchet from retreating and prevents the second door from reversing and closing. The limiting assembly adopts a ratchet-pawl mechanism, and the pawl is stuck in the ratchet tooth groove under the action of the anti-retraction elastic member to form a mechanical one-way stop. This structure completely prevents the second door from reversing and closing due to gravity or wind after opening, ensuring that the door maintains a stable opening angle during maintenance, ensuring the safety of the operator, and the opening angle of the second door is adjustable.

[0017] Optionally, the ratchet is in the shape of an arc-shaped strip, and the limit assembly also includes a limit block provided on the front surface of the box body, the limit block and the box body are provided with a through hole that is connected and for the ratchet to be inserted and passed through, a rotating groove is provided on the hole wall of the through hole of the limit block, the pawl is provided in the rotating groove, and the second box door is used to rotate until it conflicts with the limit block.

[0018] By adopting the above technical solution, the ratchet is inserted and passed through the perforation, ensuring that the second box door can be smoothly rotated and opened. By setting a limit block, rainwater is not easily able to enter the box through the perforation on the box body when entering the perforation, which is equivalent to increasing the flow path of rainwater and improving the waterproof performance; and the second box door can be rotated until it conflicts with the limit block, thereby limiting the rotation angle of the second box door.

[0019] Optionally, an unlocking groove connected to the rotating groove is provided on the surface of the limit block, and an unlocking member is provided in the unlocking groove for sliding along the horizontal direction. The unlocking member is rotatably connected to the pawl, and the unlocking member is used to slide out of the unlocking groove and drive the pawl to rotate to exit the anti-retraction groove.

[0020] By adopting the above technical solution, when the second door is to be unlocked and closed, the unlocking piece is pulled outward to drive the pawl to rotate to exit the anti-retraction groove, so that the second door can be reversed and closed; the sliding unlocking piece in the unlocking groove is rotatably connected to the pawl, and the pawl can be driven out of the anti-retraction groove by sliding the unlocking piece horizontally. This design enables the unlocking operation to be completed directly from the outside of the door without the need for tools or contact with the internal mechanism, which significantly improves the convenience and safety of releasing the limit assembly.

[0021] Optionally, the opening surface of the unlocking slot is a limiting surface, and a limiting slot connected to the unlocking slot for inserting the unlocking member is provided on the limiting surface. The unlocking member is fixed with a limiting member that slides in the limiting slot. When the unlocking member slides out of the unlocking slot, the limiting member can pass through the limiting slot. When the unlocking member is inserted into the limiting slot, the limiting member conflicts with the limiting surface.

[0022] By adopting the above technical solution, when the unlocking piece is inserted into the limiting groove, the limiting piece contacts the limiting surface to form a temporary fixation, maintaining the state of the pawl disengaged from the ratchet; this mechanism allows the second box door to remain in the unlocked state at all times, without the need for manual labor to hold the unlocking piece, which is convenient for operation and saves manpower.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. It solves the shaking problem of traditional double-doors caused by large total width and uncontrolled rotation freedom, while reducing the number of door operation steps and improving maintenance stability and safety; 2. The opening action of the first door and the unlocking action of the second door are integrated into a single operation, which greatly simplifies the process of opening the door before maintenance and improves operational efficiency; 3. The limit assembly prevents the second door from closing due to gravity or wind after opening, ensuring that the door maintains a stable opening angle during maintenance, ensuring the safety of operators, and the opening angle of the second door is adjustable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of this application.

[0025] Figure 2 It is a side sectional view of the first door and the second door when the first door is fully opened in this application.

[0026] Figure 3 It is a top sectional view of the first door and the second door when the first door is fully opened in this application.

[0027] Figure 4 This is a top-down cross-sectional view of the present application highlighting the fixing components.

[0028] Figure 5 It is a top cross-sectional view of the present application highlighting the perforation.

[0029] Figure 6 This is a top-down cross-sectional view of the present application highlighting the unlocking slot.

[0030] Figure 7 yes Figure 1 Enlarged view of point A in the middle.

[0031] Explanation of reference numerals: 1. Box body; 11. Mounting slot; 2. Box door; 21. First box door; 22. Second box door; 221. Telescopic slot; 222. Slide; 3. Locking assembly; 31. Lock block; 311. Guide slope; 32. Locking slot; 33. Locking elastic member; 4. Limiting assembly; 41. Ratchet; 411. Retraction groove; 42. Ratchet; 421. Strip hole; 43. Retraction elastic member; 4 4. Limit block; 441. Perforation; 442. Rotation slot; 443. Unlocking slot; 444. Limiting surface; 445. Limiting slot; 446. Limiting inclined surface; 5. Fixed assembly; 51. Block; 511. Insertion portion; 512. Unlocking portion; 513. Return inclined surface; 52. Slot; 53. Fixed elastic member; 6. Unlocking member; 61. Connecting end; 62. Operating end; 7. Limiting member; 8. Roller. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-7 This application is described in further detail.

[0033] The embodiment of the present application discloses a prefabricated metal closed ring network box that is easy to repair. Figure 1 and Figure 2 The prefabricated metal closed ring network box for easy maintenance includes a box body 1 and four doors 2. The box body 1 has an opening at the front and an inner cavity. The doors 2 are used to close the box body 1. The doors 2 are divided into two groups. The two groups of doors 2 are arranged along the width direction of the box body 1. The two doors 2 in one group are respectively a first door 21 and a second door 22. When the doors are closed, the second door 22 is located on the side of the first door 21 away from the adjacent group of doors 2. The prefabricated metal closed ring network box for easy maintenance also includes a locking assembly 3 and a limiting assembly 4. The first door 21 can be slidably installed on the second door 22 along the width direction of the box body 1. When the first door 21 slides to be fully opened, the locking assembly 3 is used to lock the first door 21 on the second door 22. The second door 22 can be rotatably installed on the box body 1 around a rotation axis extending in the vertical direction. When the second door 22 is rotated to open, the limiting assembly 4 is used to prevent the second door 22 from reversing and closing.

[0034] Reference Figure 1 and Figure 2, setting the depth direction of the box body 1 as the front-to-back direction, and the width direction as the left-to-right direction, when the first door 21 is fully opened, the first door 21 is located behind the second door 22. A roller 8 is rotatably mounted on the front wall of the first door 21, and the axis of rotation of the roller 8 extends along the front-to-back direction. A slide groove 222 extending along the left-to-right direction is provided on the rear wall of the second door 22. The slide groove 222 is a "T"-shaped groove. The slide groove 222 is for the roller 8 to insert and roll. The roller 8 and the slide groove 222 can guide the sliding of the first door 21 and limit it in the left-to-right direction. When the first door 21 is fully closed, there is an overlapping part in the projections of the first door 21 and the second door 22 in the front-to-back direction, that is, the first door 21 will not completely fall out of the second door 22.

[0035] Both first doors 21 are provided with a locking assembly (not shown in the figure), which is used to lock the first doors 21 to the box body 1. In other embodiments, the locking assembly can also lock the two first doors 21 relative to each other so that the two first doors 21 cannot slide back to back.

[0036] Reference Figure 2 The locking assembly 3 includes a locking block 31 and a locking slot 32 for inserting the locking block 31. A telescopic slot 221 extending in the front-to-back direction is provided on the rear wall of the second door 22, and the locking block 31 is slidably installed in the telescopic slot 221 in the front-to-back direction. The lock slot 32 extends in the front-to-back direction and passes through the first door 21. A locking elastic member 33 is connected between the locking block 31 and the bottom wall of the telescopic slot 221. The locking elastic member 33 is a compression spring. The locking elastic member 33 is used to push the locking block 31 to slide out of the telescopic slot 221, so that the end of the locking block 31 pops out of the telescopic slot 221 and inserts into the lock slot 32. Since the lock slot 32 passes through the front and back walls of the first door 21, when the first door 21 needs to be unlocked, the lock slot 32 is inserted by hand or a tool to push the lock block 31 so that the lock block 31 exits the lock slot 32. When the first door 21 is fully closed, the locking assembly 3 is located in the overlapping portion of the first door 21 and the second door 22 in the front-to-back direction, so that the lock slot 32 is not exposed to the outside, thereby ensuring the waterproof performance of the first door 21.

[0037] In other embodiments, the lock slot 32 may not penetrate the front wall of the first door 21, and an unlocking assembly may be provided on the first door 21 and the second door 22 to unlock the first door 21. In other embodiments, the locking assembly 3 may adopt a magnetic structure or a latch structure.

[0038] Reference Figure 3The locking block 31 has an inclined guide surface 311 formed on its surface near the adjacent set of doors 2 through a chamfering process. The distance between the guide surface 311 and the bottom wall of the expansion slot 221 increases gradually in the direction in which the first door 21 slides open. When the first door 21 slides open, the sidewall of the first door 21 slides against the guide surface 311, overcoming the elastic force of the locking spring 33 and pressing the locking block 31 back into the expansion slot 221. This occurs until the first door 21 slides until the locking slot 32 is aligned with the expansion slot 221. At this point, the end of the locking block 31 pops out of the expansion slot 221 under the elastic force of the locking spring 33 and retracts into the locking slot 32.

[0039] Reference Figure 4 The pre-assembled metal closed ring network box for easy maintenance also includes a fixing component 5, which is used to lock the second box door 22 on the box body 1. The fixing component 5 includes a card block 51 and a card slot 52. An installation slot 11 is provided on the inner wall of the box body 1 in the left and right directions close to the second box door 22. The card block 51 is slidably installed in the installation slot 11 along the left and right directions. The card slot 52 is provided on the side wall of the second box door 22 in the left and right directions close to the box body 1. The card block 51 includes an insertion portion 511 for inserting into the card slot 52. A fixed elastic member 53 is connected between the card block 51 and the bottom wall of the installation slot 11. The fixed elastic member 53 is a compression spring. The fixed elastic member 53 is used to push the card block 51 to slide out of the installation slot 11, so that the insertion portion 511 of the card block 51 pops out of the installation slot 11 and inserts into the card slot 52.

[0040] Reference Figure 4 The block 51 also includes an unlocking portion 512 located behind the insertion portion 511, giving the block 51 an overall "concave" shape. The unlocking portion 512 is ejected from the mounting slot 11 by the elastic force of the fixing elastic member 53. When the first door 21 slides open, the left and right sidewalls of the first door 21 contact and push the unlocking portion 512 into the mounting slot 11, allowing the insertion portion 511 to exit the slot 52.

[0041] In other embodiments, the unlocking portion 512 may not be provided, and the second door 22 may be unlocked by manually or using a tool to press the block 51 back into the mounting slot 11. In other embodiments, the fixing assembly 5 may adopt a magnetic structure or a latch structure.

[0042] Reference Figure 4The front surface of the insertion portion 511 is chamfered to form an inclined recoil surface 513. The distance between the recoil surface 513 and the bottom wall of the mounting slot 11 increases from front to back. When the second door 22 is rotated to close, the rear wall of the second door 22 slides against the recoil surface 513, overcoming the elastic force of the fixed elastic member 53 and pressing the block 51 back into the mounting slot 11. The second door 22 rotates until the slot 52 is aligned with the mounting slot 11. Under the elastic force of the fixed elastic member 53, the insertion portion 511 of the block 51 pops out of the mounting slot 11 and inserts into the slot 52.

[0043] Reference Figure 5 and Figure 6 The limiting assembly 4 includes a ratchet 41, a pawl 42 and a limiting block 44. The ratchet 41 is in the shape of an arc strip, and the central axis of the ratchet 41 extends in the vertical direction. One end of the ratchet 41 is fixedly mounted on the front wall of the second box door 22. A stop groove 411 for the end of the pawl 42 to be inserted is formed between two adjacent ratchet teeth of the ratchet 41. The limiting block 44 is fixedly mounted on the front wall of the box body 1. The limiting block 44 and the box body 1 are both provided with mutually connected through-holes 441 for the ratchet 41 to be inserted and passed through. The ratchet 41 can slide in the through-hole 441 as the second box door 22 rotates. A rotating groove 442 is provided on the wall of the through-hole 441. The pawl 42 is rotatably mounted in the rotating groove 442. The rotating axis of the pawl 42 slides in the vertical direction. The pawl 42 and the ratchet 41 are arranged in the left-right direction. A retractable elastic member 43 is connected between the pawl 42 and the wall of the rotation slot 442 . The retractable elastic member 43 is a torsion spring and is used to rotate the pawl 42 until its end is inserted into the retractable slot 411 .

[0044] The stopper assembly 4 allows the opening angle of the second door 22 to be adjustable and can prevent the second door 22 from reversing and closing at multiple angles. In other embodiments, the stopper assembly 4 can adopt a magnetic structure or a latch structure, but it cannot achieve multi-angle fixation of the second door 22.

[0045] Reference Figure 1 and Figure 5 Two stoppers 44 are provided, corresponding one to each of the two sets of doors 2. The opposing surfaces of the two stoppers 44 are chamfered to form inclined stop surfaces 446, with the distance between the two stop surfaces 446 decreasing from front to back. The second door 22 is designed to rotate until it contacts the stop surfaces 446, thereby limiting its rotational angle.

[0046] Reference Figure 5 and Figure 6On the surface of the limit block 44 away from the other limit block 44, an unlocking groove 443 extending in the left-right direction and connected to the rotation groove 442 is provided. An unlocking member 6 is slidably installed in the unlocking groove 443 in the left-right direction. The unlocking member 6 is rod-shaped. A strip hole 421 extending in the horizontal direction is provided through the pawl 42. The strip hole 421 is located behind the rotation axis of the pawl 42 and passes through the upper and lower surfaces of the pawl 42. The unlocking member 6 includes a connecting end 61 and an operating end 62. The connecting end 61 is rotatably connected to the strip hole 421 and can slide vertically relative to the pawl 42. The operating end 62 extends through the unlocking groove 443 and is intended to be held by an operator. The operator can rotate the pawl 42 by holding the operating end 62 and pulling the unlocking member 6 outward, so that the pawl 42 rotates until the end exits the anti-retraction groove 411.

[0047] Reference Figure 6 and Figure 7 The unlocking groove 443 opens onto a limiting surface 444. The limiting surface 444 further defines a limiting groove 445 that communicates with the unlocking groove 443 and into which the unlocking member 6 is inserted. A limiting member 7 is integrally formed on the lower surface of the unlocking member 6. The limiting member 7 is located between the connecting end 61 and the operating end 62 and is slidably mounted within the limiting groove 445. When the unlocking member 6 slides outward from the unlocking groove 443, the limiting member 7 can slide out of the limiting groove 445. The unlocking member 6 is then moved downward until it slides into the limiting groove 445. If the user lets go of the limiting member 7, it will come into contact with the limiting surface 444. The unlocking member 6 cannot be reset under the elastic force of the retaining elastic member 43, allowing the second door 22 to be reversed and closed.

[0048] The embodiment of the present application provides a prefabricated metal enclosed ring network box that facilitates maintenance. The principle of operation is as follows: When maintenance personnel need to inspect the ring network box, they first unlock the door lock assembly, allowing the first door 21 to slide open. If the door 2 needs to be fully opened, the maintenance personnel first slide the first door 21 to the full open position. At this point, the locking block 31 engages the locking slot 32, and the insertion portion 511 of the locking block 51 exits the locking slot 52, unlocking the second door 22. The maintenance personnel can then rotate the second door 22 to open it to a suitable angle. After the inspection is completed, the maintenance personnel first unlocks the first box door 21 and slides the first box door 21 to the closed state. The maintenance personnel then holds the operating end 62 of the unlocking member 6 and pulls it outward. The unlocking member 6 drives the pawl 42 to rotate to exit the anti-retraction groove 411. The maintenance personnel pulls the unlocking member 6 outward until the limiting member 7 exits the limiting groove 445, and moves the unlocking member 6 downward so that the limiting member 7 contacts the limiting surface 444. At this time, you can let go and reverse the second box door 22 to close it. Finally, the two first box doors 21 are locked.

[0049] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A prefabricated metal closed ring network box convenient for maintenance, comprising a box body (1) and four box doors (2), wherein the box body (1) is open at the front and has an inner cavity, and the box doors (2) are used to close the box body (1), and the box doors (2) are divided into two groups, and the two groups of box doors (2) are arranged along the width direction of the box body (1), and the two box doors (2) in one group are respectively a first box door (21) and a second box door (22), and the second box door (22) is located on a side of the first box door (21) away from an adjacent group of box doors (2), characterized in that: The utility model further comprises a locking assembly (3) and a limiting assembly (4), wherein the first door (21) can be slidably arranged on the second door (22) along the width direction of the box body (1), and when the first door (21) slides to be fully opened, the locking assembly (3) is used to lock the first door (21) on the second door (22), and the second door (22) can be rotatably arranged on the box body (1) around a rotation axis extending in a vertical direction, and when the second door (22) is rotated to open, the limiting assembly (4) is used to prevent the second door (22) from being reversed and closed.

2. The prefabricated metal closed ring network box for easy maintenance according to claim 1, characterized in that: The locking assembly (3) includes a locking block (31) and a locking groove (32) for inserting the locking block (31), a telescopic groove (221) is provided on the surface of the second box door (22), the locking block (31) is slidably arranged in the telescopic groove (221) along the depth direction of the box body (1), the locking groove (32) is provided on the first box door (21), a locking elastic member (33) is connected between the locking block (31) and the groove wall of the telescopic groove (221) to enable the locking block (31) to pop out of the telescopic groove (221) and insert into the locking groove (32), a guide inclined surface (311) is formed on the surface of the locking block (31), the distance between the guide inclined surface (311) and the groove bottom wall of the telescopic groove (221) increases along the direction in which the first box door (21) slides open, and the first box door (21) is used to slide until it contacts the guide inclined surface (311) and press the locking block (31) back into the telescopic groove (221).

3. The prefabricated metal closed-loop cage for easy maintenance according to claim 1 is characterized in that: The invention also includes a fixing assembly (5), wherein the fixing assembly (5) is used to lock the second box door (22) on the box body (1), and the fixing assembly (5) includes a card block (51) and a card slot (52). The inner wall of the box body (1) is provided with a mounting slot (11), and the card block (51) is slidably arranged in the mounting slot (11) along the width direction of the box body (1). The card slot (52) is provided on the second box door (22), and the card block (51) includes an insertion portion (511) for inserting into the card slot (52). A fixing elastic member (53) is connected between the card block (51) and the groove wall of the mounting slot (11) to enable the insertion portion (511) of the card block (51) to pop out of the mounting slot (11) and insert into the card slot (52).

4. The prefabricated metal closed-loop cage for easy maintenance according to claim 3 is characterized in that: When the first door (21) is fully opened, the first door (21) is located on a side of the second door (22) close to the inner cavity of the box body (1), and the card block (51) further includes an unlocking portion (512), which is located on a side of the insertion portion (511) close to the inner cavity of the box body (1). The first door (21) is used to slide to contact and push the unlocking portion (512), thereby driving the card block (51) to move to the insertion portion (511) and exit the card slot (52).

5. The prefabricated metal closed-loop cage for easy maintenance according to claim 3 is characterized in that: A recoil slope (513) is formed on the surface of the insertion portion (511) away from the unlocking portion (512), and the distance between the recoil slope (513) and the bottom wall of the installation groove (11) decreases along the arrangement direction of the box body (1) and the box door (2). The second box door (22) is used to slide against the recoil slope (513) to press the block (51) back into the installation groove (11).

6. The prefabricated metal closed-loop cage for easy maintenance according to claim 1, characterized in that: The limiting assembly (4) comprises a ratchet (41) fixedly arranged on the second box door (22) and a pawl (42) rotatably arranged on the box body (1); the rotation axis of the pawl (42) extends in the vertical direction; a stop groove (411) is formed between two adjacent ratchet teeth of the ratchet (41); and a stop elastic member (43) is connected between the pawl (42) and the box body (1) so that the end of the pawl (42) is inserted into the stop groove (411).

7. The prefabricated metal closed-loop cage for easy maintenance according to claim 6, characterized in that: The ratchet (41) is in the shape of an arc strip, and the limiting assembly (4) further comprises a limiting block (44) provided on the front surface of the box body (1), the limiting block (44) and the box body (1) are both provided with a through hole (441) which is connected and for the ratchet (41) to be inserted and passed through, a rotation groove (442) is provided on the hole wall of the through hole (441) of the limiting block (44), the pawl (42) is provided in the rotation groove (442), and the second box door (22) is used to rotate until it contacts the limiting block (44).

8. The prefabricated metal closed-loop cage for easy maintenance according to claim 7, characterized in that: An unlocking groove (443) communicating with the rotation groove (442) is provided on the surface of the limit block (44), an unlocking member (6) is provided in the unlocking groove (443) for sliding in the horizontal direction, the unlocking member (6) being rotationally connected to the pawl (42), and the unlocking member (6) being used to slide outward of the unlocking groove (443) and drive the pawl (42) to rotate until it exits the anti-retraction groove (411).

9. The prefabricated metal closed-loop cage for easy maintenance according to claim 8, characterized in that: The opening surface of the unlocking groove (443) is a limiting surface (444), and a limiting groove (445) is provided on the limiting surface (444) and is connected to the unlocking groove (443) for the unlocking member (6) to be inserted. A limiting member (7) is fixedly provided on the unlocking member (6) and slides in the limiting groove (445). When the unlocking member (6) slides out of the unlocking groove (443), the limiting member (7) can pass through the limiting groove (445). When the unlocking member (6) is inserted into the limiting groove (445), the limiting member (7) contacts the limiting surface (444).

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