Cabinet door interlocking structure of ring main unit

Abstract

The utility model relates to the technical field of ring main unit interlocking, and discloses a cabinet door interlocking structure of a ring main unit, which comprises a cabinet door main body, a guide baffle plate, a cable chamber side plate and an operating mechanism which are mutually combined for use to play a role, and can prevent mistakenly entering an electrified interval on the basis of five-prevention interlocking of an original ring main unit. The cable chamber cabinet door can be opened only at the grounding position, the interlocking key can be taken out to unlock the net door after the cabinet door main body is opened, the cabinet door main body can be closed only when the interlocking key returns to the lock and is in an unlocking state, the cable chamber cabinet door can be used as a general standardized design, factory and on-site installation requirements can be met at any time, operation is simple, and an original structure does not need to be excessively modified. And the design of the hook claw fastening port enables the outer side door plate to be clamped into the ring main unit in a lifting manner, the strength is better, the arcing impact resistance is realized, the cross section of the guide baffle plate is of a Z-shaped structure, when an internal arcing fault occurs, the Z-shaped structure plays a role in guiding arcing gas, and a corridor structure is formed between the Z-shaped structure and the cabinet door main body.

Description

TECHNICAL FIELD

[0001] The utility model relates to the interlocking technical field of ring main unit, specifically is a cabinet door interlocking structure of ring main unit. BACKGROUND

[0002] The cabinet door of the ring main unit should have an interlocking function to prevent mistaken entry into a live interval, and in the scenarios of photovoltaic, wind power and energy storage, a set of interlocking system should exist between the ring main unit and the transformer net door to prevent the transformer from being mistakenly opened by the operator to enter the transformer room under the condition of being live,

[0003] There are also many interlocking technologies that add a mechanical program lock to the grounding switch, and the interlocking key is taken out to open the net door when grounding. This technology needs to customize a large number of non-standard mechanisms for conventional mechanisms, and additional design and installation of supporting parts are needed to expose the interlocking key through the opening in the mechanism room panel.

[0004] A high-voltage cabinet grounding switch and transformer net door interlocking method is disclosed in Chinese patent CN114038698A, which can effectively solve the problem of mechanical interlocking between the high-voltage cabinet grounding switch and the transformer net door, prevent the transformer net door from being opened under the condition of being live or the power from being sent under the condition of the transformer net door not being closed, completely solve the "five-prevention" problem, and increase the safety and reliability of the high-voltage cabinet overall system.

[0005] In summary, there are still many drawbacks in the existing ring main unit interlocking technology, which can be summarized as follows:

[0006] How to effectively prevent site misoperation and improve operation safety using simple mechanical structures on the basis of the original. INVENTION CONTENTS

[0007] In view of the deficiencies of the prior art, the utility model provides a cabinet door interlocking structure of ring main unit to solve the above problems.

[0008] To achieve the above purpose, the utility model is implemented by the following technical solutions.

[0009] The application discloses a door interlocking structure of a ring main unit, which comprises a door main body, a guide baffle, a cable chamber side plate, and an operating mechanism, the cable chamber side plate is provided with an array of through grooves, the door main body comprises an outer door plate, an inner locking plate, a lock, and a fixing member, the outer door plate is adjustably connected to the inner locking plate through the fixing member, the inner locking plate is provided with an array of hook teeth, the shape of the hook teeth is matched with the shape of the through grooves, the lock is arranged on the inner locking plate and corresponds to the position of the cable chamber side plate, and the guide baffle is connected to the cable chamber side plate. Based on the original ring main unit five-prevention interlocking, the door interlocking structure can prevent mistaken entry into a live interval, the cable chamber door can be opened only when the grounding position is reached, the interlocking key can be taken out only after the door main body is opened, the door main body can be closed only when the interlocking key returns to the lock and is in an unlocked state, the door interlocking structure can be used as a universal standardized design, can meet the requirements of factory and on-site installation at any time, is simple to operate, does not need to be excessively modified from the original structure, the design of the hook fastening opening can make the outer door plate be pulled and clamped into the ring main unit, the strength is better, the anti-arc impact is better, the cross section of the guide baffle is Z-shaped, the Z-shaped structure can guide the arc gas when an internal arc fault occurs, and a corridor structure is formed between the guide baffle and the door main body.

[0010] Preferably, the outer door plate is provided with a pull handle.

[0011] Preferably, the fixing member of the outer door plate is a bolt.

[0012] Preferably, the inner locking plate is provided with a movable adjusting groove.

[0013] Preferably, the movable adjusting groove is matched with the shape of the fixing member.

[0014] Preferably, the cross section of the guide baffle is Z-shaped.

[0015] Preferably, the hook tooth comprises a hook arc entry and a hook fastening opening.

[0016] Preferably, the hook arc entry is located at the end of the hook tooth, and the hook fastening opening is located at the inner side of the hook tooth.

[0017] Preferably, the lock is a mechanical program lock.

[0018] Preferably, the operating mechanism is provided with a lifting plate on the interlocking rod, and the lifting plate corresponds to the position of the inner locking plate.

[0019] Compared to existing technologies, this utility model discloses a cabinet door interlocking structure for a ring main unit, including a cabinet door body, a guide baffle, a cable compartment side plate, and an operating mechanism. These four components work together to prevent accidental entry into energized compartments based on the original five-proof interlocking system of the ring main unit. The cable compartment cabinet door can only be opened when the device is in the grounding position. The interlocking key can only be retrieved to unlock the door after the cabinet door body is opened. The cabinet door body can only be closed after the interlocking key is returned to the lock and unlocked. This design can be used as a universal standardized design to meet factory and on-site installation requirements at any time. It is simple to operate and does not require much modification to the original structure. Furthermore, the design of the hook fastening port allows the outer door panel to be pulled into the ring main unit in a lifting manner, resulting in better strength and resistance to arcing impact. The guide baffle has a Z-shaped cross-section. The Z-shaped structure guides the arcing gas in the event of an internal arcing fault and forms a corridor structure with the cabinet door body. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cabinet door interlocking structure of the ring main unit of this utility model;

[0021] Figure 2 This is a schematic diagram of the main body of the cabinet door of this utility model;

[0022] Figure 3 This is a schematic diagram of the main body of the cabinet door of this utility model;

[0023] Figure 4 This is a schematic diagram of the hook claw teeth of this utility model;

[0024] Figure 5 This is a schematic diagram of the operating mechanism of this utility model;

[0025] Figure 6 This is an operational schematic diagram of the cabinet door interlocking structure of the ring main unit of this utility model;

[0026] Figure 7 This is an operational schematic diagram of the cabinet door interlocking structure of the ring main unit of this utility model;

[0027] Figure 8 This is an operational schematic diagram of the cabinet door interlocking structure of the ring main unit of this utility model;

[0028] Figure 9 This is an operational schematic diagram of the cabinet door interlocking structure of the ring main unit of this utility model;

[0029] Figure 10 This is a schematic diagram illustrating the guiding effect of the guide baffle of this utility model on the arcing gas. Detailed Implementation

[0030] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, and not all the embodiments.

[0031] A cabinet door interlocking structure of a ring main unit, comprising a cabinet door body 1, a guide baffle 2, a cable chamber side plate 3, an operating mechanism 4, the cable chamber side plate 3 is provided with an array of through grooves 31, the cabinet door body 1 comprises an outer door plate 11, an inner lock plate 12, a lock 13, a fixing part 14, the outer door plate 11 is adjustably connected to the inner lock plate 12 through the fixing part 14, the inner lock plate 12 is provided with an array of hook teeth 121, and the shape of the hook teeth 121 is matched with the through grooves 31, the lock 13 is arranged on the inner lock plate 12 and corresponds to the position of the cable chamber side plate 3, the guide baffle 2 is connected to the cable chamber side plate 3, and the outer door plate 11 is provided with a pull handle 111.

[0032] The fixing part 14 of the outer door plate 11 is a bolt, the inner lock plate 12 is provided with a movable adjusting groove 122, the movable adjusting groove 122 is matched with the shape of the fixing part 14, the outer door plate 11 can select a suitable position on the movable adjusting groove 122 through the fixing part 14, and the fixing part 14 is tightened after the up-down position of the outer door plate 11 on the ring main unit is adjusted.

[0033] The cross section of the guide baffle 2 is Z-shaped, the Z-shaped structure plays a guiding role on the arc gas when an internal combustion arc fault occurs, and forms a cloister structure with the cabinet door body 1, as shown in Figure 10 .

[0034] The hook tooth 121 comprises a hooking arc 1211 and a hooking fastening port 1212, the hooking arc 1211 is located at the end of the hook tooth 121, and the hooking fastening port 1212 is located at the inner side of the hook tooth 121, the special design of the hooking arc 1211 makes the outer door plate 4 enter more smoothly, and the design of the hooking fastening port 1212 can make the outer door plate 11 pull-type clamped into the ring main unit, and the strength is better and the anti-arc impact is better.

[0035] The lock 13 is a mechanical program lock.

[0036] The interlocking rod of the operating mechanism 4 is provided with a lifting plate 41, and the lifting plate 41 corresponds to the position of the inner lock plate 12, can prevent the outer door plate 11 from being pulled open when the operating mechanism 4 is grounded, the operating mechanism 4 is common in the ring main unit, the operating mechanism 4 used in the scheme is also a conventional technology, therefore, the internal details are not described too much, the scheme only adds the lifting plate 41 on the operating mechanism 4, and other structures are not changed, as shown in Figure 5 , the interlocking rod of the operating structure can realize two position actions of the opening position and the grounding position.

[0037] When the transformer side needs to be shut down for maintenance, the ring network cabinet side grounding switch is grounded, and the lifting plate 41 is moved up, as shown in the figure, at this time the outer door plate 11 can be pulled up by the pull handle 111, when the hook claw tooth 121 of the hook claw fastening port 1212 exceeds the through slot 31 on the cable chamber side plate 3, the outer door plate 11 can be taken out as a whole. At this time, the lock 13 can be rotated to the locking position, which can pull out the interlocking key to unlock the transformer network door. At this time, the lock tongue of the lock 13 is extended, and the extended lock tongue exceeds the guide baffle 2, at this time the outer door plate 11 cannot be closed, preventing misoperation of power transmission, as shown in the figure. Figure 8 Figure 7

[0038] When the transformer side maintenance is completed and the interlocking key is retrieved, the interlocking key is inserted into the lock 13 to unlock the lock 13, that is, to unlock the mechanical program lock, and the lock tongue is retracted and the interlocking key cannot be pulled out. At this time, the lower cabinet door can be closed, the grounding switch is disconnected, and the power transmission operation is performed, as shown in the figure, and the lifting plate 41 is moved down into the disconnection position, as shown in the figure, and the outer door plate 11 cannot be pulled open. Figure 6 Figure 9

[0039] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0040] It should be noted that the terms "first", "second", and the like, as used in the specification, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms in the description is merely intended to distinguish between analogous elements of the application and is not a limitation on the description. Unless otherwise defined, all terms used in disclosing elements of the application are to be interpreted in accordance with their ordinary meaning.

[0041] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.​​​​

Claims

1. A door interlocking structure of a ring main unit, characterized in that: Including cabinet door body (1), guide baffle (2), cable chamber side plate (3), operating mechanism (4), arrayed with through slot (31) on the cable chamber side plate (3), the cabinet door body (1) includes outer door panel (11), inner side lock plate (12), lockset (13), fixing piece (14), the outer door panel (11) is adjustably connected with the inner side lock plate (12) by fixing piece (14), the inner side lock plate (12) is arrayed with hook claw tooth (121), and the shape of hook claw tooth (121) is adapted to through slot (31), the lockset (13) is arranged on the inner side lock plate (12), and corresponds the position of cable chamber side plate (3), the guide baffle (2) is connected on the cable chamber side plate (3).

2. The interlocking structure of the cabinet door of the ring main unit according to claim 1, characterized in that: The outer door panel (11) is provided with a pull handle (111).

3. The interlocking structure of the cabinet door of the ring main unit according to claim 1, characterized in that: The fixing piece (14) of the outer door panel (11) is a bolt.

4. The interlocking structure of the cabinet door of the ring main unit according to claim 3, characterized in that: The inner side lock plate (12) is provided with a movable adjusting groove (122).

5. The interlocking structure of the cabinet door of the ring main unit according to claim 4, characterized in that: The movable adjusting groove (122) is adapted to the shape of the fixing piece (14).

6. The interlocking structure of the cabinet door of the ring main unit according to claim 1, characterized in that: The cross section of the guide baffle (2) is Z-shaped.

7. The interlocking structure of the cabinet door of the ring main unit according to claim 1, characterized in that: The hook claw tooth (121) includes a hook claw easy-to-enter arc (1211) and a hook claw fastening port (1212).

8. The interlocking structure of the cabinet door of the ring main unit according to claim 7, characterized in that: The hook claw easy-to-enter arc (1211) is located at the end of the hook claw tooth (121), and the hook claw fastening port (1212) is located at the inner side of the hook claw tooth (121).

9. The interlocking structure of the cabinet door of the ring main unit according to claim 1, characterized in that: The lockset (13) is a mechanical program lock.

10. The interlocking structure of the cabinet door of the ring main unit according to claim 1, characterized in that: The operating mechanism (4) is provided with a lifting plate (41) on the interlocking rod, and the lifting plate (41) corresponds to the position of the inner side lock plate (12).

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