A cable chamber sliding door interlocking structure and ring main unit

Abstract

The utility model provides a kind of cable chamber overhead door interlocking structure, including electromagnetic lock and interlocking piece, the electromagnetic lock is fixedly arranged on external frame, the interlocking piece is installed on the slide bar of the electromagnetic lock, the interlocking piece is pressed on the cable chamber overhead door, the electromagnetic lock locks the slide bar so that cable chamber overhead door is stopped by interlocking piece, so as to be unable to be pulled open upward;The electromagnetic lock is unlocked to the slide bar so that cable chamber overhead door loses the pressing limit of interlocking piece, and cable chamber overhead door can be normally pulled open;Interlocking to cable chamber overhead door is realized by simple structure, avoid personnel in the on-off equipment live state mistake into cable chamber, improve power utilization safety, avoid the occurrence of safety accident.

Description

Technical Field

[0001] This utility model relates to the field of live high-voltage switchgear, specifically to a cable compartment pull-out door interlocking structure and a ring main unit. Background Technology

[0002] A ring main unit (RMU) is an electrical device consisting of a group of power transmission and distribution equipment (high-voltage switchgear) housed in a metal or non-metal insulated cabinet or assembled into a modular ring network power supply unit. It includes a high-voltage cable compartment. The cable compartment sliding door is a protective door that can be opened and closed by pulling up and down. It is simple in structure and easy to use, and is frequently used in RMUs. The interlocking of the cable compartment sliding door is usually achieved through the opening and closing of the grounding switch operating mechanism. When the grounding switch is in the closed position, the cable compartment sliding door can be opened. When the grounding switch is in the open position, the cable compartment sliding door cannot be opened, thus preventing accidental entry into the energized compartment and improving electrical safety.

[0003] However, some cabinet types lack a grounding operating mechanism. The cable compartment sliding door of this type of cabinet does not have a locking device when it is pulled up. Especially when the power is on, the cabinet door can be opened at will, posing a great safety hazard. Utility Model Content

[0004] Therefore, this utility model provides a cable compartment sliding door interlocking structure and a ring main unit for interlocking the cable compartment sliding door when used in a ring main unit without a grounding operating mechanism.

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

[0006] A cable compartment sliding door interlocking structure is disclosed, wherein the cable compartment sliding door can be opened by lifting upwards. The cable compartment sliding door interlocking structure includes an electromagnetic lock and an interlocking component. The electromagnetic lock is fixedly mounted on an external frame, and the interlocking component is mounted on a slide rod of the electromagnetic lock. The interlocking component presses against the cable compartment sliding door. The electromagnetic lock locks the slide rod, thereby blocking the cable compartment sliding door from being lifted upwards by the interlocking component. The electromagnetic lock unlocks the slide rod, thus removing the pressure restriction of the interlocking component from the cable compartment sliding door.

[0007] Furthermore, the electromagnetic lock is fixed above the cable compartment sliding door, and the interlocking component is vertically downward and presses against the cable compartment sliding door.

[0008] Furthermore, an interlocking baffle is fixed on the cable compartment sliding door, and the interlocking component presses against the interlocking baffle of the cable compartment sliding door.

[0009] Furthermore, a clearance window is provided on one side of the interlocking baffle, and the interlocking member has a laterally extending stop arm that extends into the clearance window; the stop arm of the interlocking member presses against the bottom side wall of the clearance window to stop the cable compartment lifting door.

[0010] Furthermore, the interlocking component is an "L"-shaped interlocking rod, including a vertically arranged vertical rod and a stop arm connected to the lower end of the vertical rod; the upper end of the vertical rod is fixedly connected to the slide rod of the electromagnetic lock.

[0011] Furthermore, the cable compartment lifting door interlocking structure also includes a guide member, which forms a guiding engagement with the interlocking member.

[0012] Furthermore, the cable compartment sliding door interlocking structure also includes an electromagnetic lock mounting plate, on which the electromagnetic lock is mounted and the mounting plate is fixed to an external frame; a guide member is fixed on the electromagnetic lock mounting plate, and the guide member forms a guiding engagement with the interlocking member.

[0013] Furthermore, the cable compartment lifting door interlocking structure also includes a linkage operation mechanism, which is linked with the slide rod of the electromagnetic lock, and the operating end of the linkage operation mechanism is exposed.

[0014] Furthermore, the electromagnetic lock is electrically connected to the current transformer in the cable compartment, thereby energizing or de-energizing the electromagnetic lock, and thus locking or unlocking the sliding rod; alternatively, the electromagnetic lock is connected to the high-voltage live indicator of the ring main unit, and the high-voltage live indicator controls the energization or de-energization of the electromagnetic lock, thereby locking or unlocking the sliding rod.

[0015] A ring main unit includes a cable compartment with a cable compartment lift-up door, which can be opened by lifting upwards; it also includes the above-mentioned cable compartment lift-up door interlocking structure, wherein the cable compartment lift-up door and the cable compartment lift-up door interlocking structure form an interlocking cooperation.

[0016] Furthermore, the ring main unit also has a mechanism compartment located above the cable compartment, and the electromagnetic lock is fixedly mounted on the side plate of the mechanism compartment.

[0017] The technical solution provided by this utility model has the following beneficial effects:

[0018] An electromagnetic lock and an interlocking component pressing against the cable compartment sliding door are added. The electromagnetic lock locks the sliding rod, causing the cable compartment sliding door to be blocked by the interlocking component, thus preventing it from being pulled up and opened. The electromagnetic lock unlocks the sliding rod, allowing the interlocking component to move and move, so that the cable compartment sliding door is no longer restricted by the interlocking component and can be pulled up and opened normally. This simple structure achieves an interlock for the cable compartment sliding door, preventing personnel from accidentally entering the cable compartment when the switchgear is energized, improving electrical safety, and avoiding safety accidents. Attached Figure Description

[0019] Figure 1 The diagram shown is a schematic representation of the ring main unit in the embodiment. Figure 1 ;

[0020] Figure 2 The diagram shown is a schematic representation of the ring main unit in the embodiment. Figure 2 ;

[0021] Figure 3 As shown Figure 2 An enlarged schematic diagram of region A in the middle. Detailed Implementation

[0022] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0023] In the description of this invention, terms such as "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] Reference Figures 1 to 3 As shown, this embodiment provides a ring main unit 1, which has a cable compartment 2 and a mechanism compartment 4 located above the cable compartment 2; the cable compartment 2 has a cable compartment lifting door 3, which can be opened by lifting upwards.

[0027] Furthermore, this embodiment also provides a cable compartment sliding door interlocking structure, applied to the aforementioned ring main unit 1; the cable compartment sliding door 3 and the cable compartment sliding door interlocking structure form an interlocking cooperation. Specifically, refer to... Figures 1 to 3 As shown, the cable compartment sliding door interlocking structure includes an electromagnetic lock 10 and an interlocking component 20. The electromagnetic lock 10 is fixedly mounted on an external frame and electrically connected to the cable compartment 2. That is, the electromagnetic lock 10 draws power from the cable compartment 2. When the cable compartment 2 is energized, the electromagnetic lock 10 is in an energized state; when the cable compartment 2 is de-energized, the electromagnetic lock 10 is in a de-energized state. Preferably, the electromagnetic lock 10 draws power from the cable compartment 2 from a current transformer installed on the cable in the cable compartment 2. The voltage and current on the current transformer are both relatively small, suitable for the electromagnetic lock 10, and it avoids shunting current from the high-voltage cable.

[0028] Furthermore, the electromagnetic lock 10 adopts the existing technology structure. The electromagnetic lock 10 has a slide bar 11. In this embodiment, the electromagnetic lock 10 is configured to lock the slide bar 11 when the electromagnetic lock 10 is energized, and unlock the slide bar 11 when the electromagnetic lock 10 is de-energized.

[0029] The interlocking component 20 is installed on the slide rod 11 of the electromagnetic lock 10. The interlocking component 20 presses against the cable compartment sliding door 3. When the cable compartment 2 is not de-energized, the electromagnetic lock 10 is energized. At this time, the electromagnetic lock 10 locks the slide rod 11, causing the cable compartment sliding door 3 to be stopped by the interlocking component 20. That is, the slide rod 11 and the interlocking component 20 are locked and cannot move, so that the interlocking component 20 remains pressed against the cable compartment sliding door 3, thereby preventing the cable compartment sliding door 3 from being lifted and opened. When the cable compartment 2 is completely de-energized, the electromagnetic lock 10 is de-energized. The electromagnetic lock 10 unlocks the slide rod 11. At this time, the interlocking component 20 can move to make room, so that the cable compartment sliding door 3 loses the pressing restriction of the interlocking component, and the cable compartment sliding door 3 can be lifted and opened normally.

[0030] This application achieves interlocking of the cable compartment sliding door 3 through a simple structure, preventing personnel from accidentally entering the cable compartment when the switchgear is energized, improving electrical safety and preventing safety accidents; it is very suitable for ring main units without grounding operating mechanisms.

[0031] Specifically, in this embodiment, the electromagnetic lock 10 is fixed above the cable compartment lifting door 3, and the interlocking member 20 is vertically downward and presses against the cable compartment lifting door 3. This is beneficial to the design, and when the cable compartment lifting door 3 is lifted upward in the state of pressing and locking, the direction of the force on the interlocking member 20 is consistent with the extension direction of the interlocking member 20, and the interlocking member 20 is not easily bent. Of course, in other embodiments, the electromagnetic lock 10 can also be fixed to the side of the cable compartment lifting door 3. When the electromagnetic lock 10 unlocks the slide bar 11, the interlocking member 20 can be moved out to the side, so that it is detached from the cable compartment lifting door 3, thereby allowing the cable compartment lifting door 3 to be lifted upward and opened. Although it can also achieve the interlocking effect, in this side-mounted setting, when the cable compartment lifting door 3 is lifted upward, the direction of the force on the interlocking member 20 is not consistent with the extension direction of the interlocking member 20 when the interlocking member 20 is in the state of pressing and locking, which can easily cause the interlocking member 20 to bend or break, and is not the most preferred option.

[0032] Furthermore, an interlocking baffle 30 is fixed to the cable compartment sliding door 3. The interlocking component 20 presses against the interlocking baffle 30 of the cable compartment sliding door 3. The interlocking baffle 30 can be assembled laterally, allowing assembly on the existing ring main unit structure without altering its design. More specifically, the interlocking baffle 30 is located inside the cable compartment sliding door 20, forming a concealed structure that maintains a clean appearance and preserves the volume of the ring main unit 1; it also prevents damage due to exposed structure.

[0033] In a further preferred embodiment, a clearance window 31 is provided on one side of the interlocking baffle 30. In this embodiment, the clearance window 31 is square. The interlocking member 20 has a laterally extending stop arm 22, which extends into the clearance window 31. The stop arm 22 of the interlocking member 20 presses against the bottom side wall 32 of the clearance window 31 to stop the cable compartment lifting door 3. The cooperation structure between the clearance window 31 and the stop arm 22 is provided so that the clearance window 31 can limit the range of motion of the stop arm 22, so that the interlocking member 20 and the interlocking baffle 30 have a relative range of motion, but will not disengage and cause the stop to fail.

[0034] The interlocking baffle 30 is installed on the inside of the cable room lifting door 3 to avoid the possibility of human interference caused by exposure, and also to maintain the clean appearance of the product.

[0035] Specifically, the interlocking component 20 is an "L"-shaped interlocking rod 20, including a vertically arranged vertical rod 21 and a stop arm 22 connected to the lower end of the vertical rod 21; the upper end of the vertical rod 21 is fixedly connected to the slide rod 11 of the electromagnetic lock 10. Specifically, the upper end of the vertical rod 21 is fixed to the slide rod 11 by two fasteners (such as bolts, rivets, etc.) to achieve a stable connection.

[0036] In this embodiment, an interlocking baffle 30 is added to the cable compartment sliding door 3 to engage with the interlocking rod 20 for a stop, improving the flexibility of the stop engagement without altering the original structure of the cable compartment sliding door 3. Furthermore, the "L"-shaped interlocking rod 20 and the interlocking baffle 30 with a clearance window 31 ensure a more complete stop engagement, facilitating layout and improving stop reliability. Of course, in other embodiments, when the cable compartment sliding door 3 has sufficient space to provide pressure, the interlocking member 20 can directly press against the body of the cable compartment sliding door 3, and the interlocking member 20 can simply be a vertical rod 21, etc.

[0037] The ring main unit 1 also has a mechanism chamber 4 located above the cable chamber 2. The electromagnetic lock 10 is fixedly mounted on a side panel 5 of the mechanism chamber 4, that is, the aforementioned external frame is the side panel 5 of the mechanism chamber 4. Specifically, the side panel 5 can be a fixed plate or an openable side door panel, which is not limited here. Of course, in other embodiments, the external frame can also be other structures, such as supports inside the mechanism chamber 4 or in other locations.

[0038] The cable compartment lifting door interlocking structure also includes an electromagnetic lock mounting plate 40, on which the electromagnetic lock 10 is mounted. The electromagnetic lock mounting plate 40 is fixed to the external frame (i.e., the side plate 5 of the mechanism compartment 4). Similarly, the electromagnetic lock mounting plate 40 is also fixed to the inside of the side plate 5 of the mechanism compartment 4, which serves to protect the electromagnetic lock 10 and ensure the overall appearance of the machine is simple.

[0039] A guide member 50 is fixed on the electromagnetic lock mounting plate 40. The guide member 50 and the interlocking member 20 form a guiding fit. For example, the guide member 50 is a guiding bracket. The guide member 50 is fixed to the bottom of the electromagnetic lock mounting plate 40 and is provided with a guide hole. The vertical rod 21 of the interlocking member 20 passes through the guide hole of the guide member 50 to achieve limiting and guiding. In this way, the lifting and lowering movement of the interlocking member 20 is not prone to swaying and causing disengagement.

[0040] The above discloses the auxiliary installation of the electromagnetic lock mounting plate 40 and the guiding and limiting of the guide member 50. In order to realize one of the preferred solutions of this application, of course, in other embodiments, the electromagnetic lock 10 and the guide member 50 can also be directly fixed on the external frame (such as the side plate 5 of the mechanism chamber 4).

[0041] Furthermore, to more accurately confirm the position of the interlocking element 20 and ensure that the interlocking element 20 can switch to the stop position, in this embodiment, the cable compartment lifting door interlocking structure further includes a linkage operation mechanism 60. The linkage operation mechanism 60 is linked with the slide rod 11 of the electromagnetic lock 10. The operating end of the linkage operation mechanism 60 is exposed, such as... Figure 1 The image shows the outer side of the side panel 5 exposed in the mechanism chamber 4. The interlocking element 20 is switched between a stop position and a yield position via a linkage operating mechanism 60. Thus, the operator can operate the linkage operating mechanism 60 to switch the position of the interlocking element 20. To lock, the interlocking element 20 is pressed down to the stop position by operating the linkage operating mechanism 60. To open the cable chamber lifting door 3, the interlocking element 20 is first raised to the yield position by operating the linkage operating mechanism 60. If the linkage operating mechanism 60 cannot be operated at this time, it indicates that the cable chamber 2 is not de-energized and is locked by the electromagnetic lock 10. If it can be operated normally, it indicates that the cable chamber 2 is completely de-energized, and the cable chamber lifting door 3 can be lifted and opened. This linkage operating mechanism 60 structure allows for standardized operation by the operator, precise confirmation of the position of the interlocking element 20, and ensures that the interlocking element 20 can be switched to the stop position. Specifically, the linkage operation mechanism 60 can be a knob-type linkage operation mechanism 60, that is, the knob and the slide bar 11 are linked together, and the slide bar 11 is driven to slide up and down by rotating the knob; or it can be a vertical lifting knob structure, and the slide bar 11 is driven to slide up and down by directly moving the knob up and down, etc.

[0042] Example 2

[0043] This embodiment provides a cable compartment sliding door interlocking structure, which is largely the same as the structure disclosed in Embodiment 1. The difference lies in that, in this embodiment, the electromagnetic lock is connected to the high-voltage live indicator of the ring main unit. The high-voltage live indicator controls the electromagnetic lock 10 to be energized or de-energized, thereby locking or unlocking the slide rod 11. If the electromagnetic lock 10 adopts the configuration of Embodiment 1, the slide rod 11 is locked when the high-voltage live indicator controls the electromagnetic lock 10 to be energized, and unlocked when the high-voltage live indicator controls the electromagnetic lock 10 to be de-energized. Of course, in other embodiments, the electromagnetic lock 10 can also be selected to lock the slide rod 11 when de-energized and unlock it when energized. Controlling the electromagnetic lock 10 through the high-voltage live indicator of the ring main unit can effectively prevent personnel from accidentally entering the cable compartment when the switching equipment is energized, improving electrical safety and preventing accidents; it is very suitable for ring main units without grounding operating mechanisms.

[0044] Furthermore, this embodiment also provides a ring main unit 1, which has the cable compartment pull-out door interlocking structure described above.

[0045] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A cable compartment sliding door interlocking structure, wherein the cable compartment sliding door can be opened by lifting upwards; characterized in that: The cable compartment sliding door interlocking structure includes an electromagnetic lock and an interlocking component. The electromagnetic lock is fixedly mounted on an external frame, and the interlocking component is installed on the slide rod of the electromagnetic lock. The interlocking component presses against the cable compartment sliding door. The electromagnetic lock locks the slide rod, causing the cable compartment sliding door to be stopped by the interlocking component, thus preventing it from being pulled upwards and opened. The electromagnetic lock unlocks the slide rod, causing the cable compartment sliding door to lose the pressure restriction of the interlocking component.

2. The cable compartment sliding door interlocking structure according to claim 1, characterized in that: The electromagnetic lock is fixed above the cable compartment sliding door, and the interlocking component is vertically downward and presses against the cable compartment sliding door.

3. The cable compartment lifting door interlocking structure according to claim 2, characterized in that: An interlocking baffle is fixed on the cable compartment sliding door, and the interlocking component presses against the interlocking baffle of the cable compartment sliding door.

4. The cable compartment lifting door interlocking structure according to claim 3, characterized in that: The interlocking baffle has a clearance window on one side, and the interlocking has a laterally extending stop arm that extends into the clearance window; the stop arm of the interlocking presses against the bottom side wall of the clearance window to stop the cable compartment lifting door.

5. The cable compartment sliding door interlocking structure according to claim 4, characterized in that: The interlocking component is an "L"-shaped interlocking rod, including a vertically arranged vertical rod and a stop arm connected to the lower end of the vertical rod; the upper end of the vertical rod is fixedly connected to the slide rod of the electromagnetic lock.

6. The cable compartment sliding door interlocking structure according to claim 1, characterized in that: The cable compartment lifting door interlocking structure also includes a guide member, which forms a guiding engagement with the interlocking member.

7. The cable compartment sliding door interlocking structure according to claim 1, characterized in that: The cable compartment sliding door interlocking structure also includes an electromagnetic lock mounting plate, on which the electromagnetic lock is mounted and the mounting plate is fixed to an external frame; a guide member is fixed on the electromagnetic lock mounting plate, and the guide member forms a guiding engagement with the interlocking member.

8. The cable compartment sliding door interlocking structure according to any one of claims 1 to 7, characterized in that: The cable compartment lifting door interlocking structure also includes a linkage operation mechanism, which is linked with the slide rod of the electromagnetic lock, and the operating end of the linkage operation mechanism is exposed.

9. The cable compartment sliding door interlocking structure according to claim 1, characterized in that: The electromagnetic lock is electrically connected to the current transformer in the cable compartment, thereby energizing or de-energizing the electromagnetic lock and locking or unlocking the slide bar; or, the electromagnetic lock is connected to the high-voltage live display of the ring main unit, and the high-voltage live display controls the energization or de-energization of the electromagnetic lock, thereby locking or unlocking the slide bar.

10. A ring main unit, comprising a cable compartment with a pull-out door, the cable compartment pull-out door being openable by pulling upwards; characterized in that: It also includes the cable compartment lifting door interlocking structure according to any one of claims 1 to 9, wherein the cable compartment lifting door and the cable compartment lifting door interlocking structure form an interlocking cooperation.

11. The ring main unit according to claim 10, characterized in that: The ring main unit also has a mechanism compartment located above the cable compartment, and the electromagnetic lock is fixedly mounted on the side plate of the mechanism compartment.

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