CN218069668U - Interlocking device for switch cabinet and switch cabinet with same - Google Patents

Abstract

The utility model relates to an interlock and have its cubical switchboard for cubical switchboard, interlock includes: a door lock member including a main body portion and a lock lever movably mounted to the main body portion, the lock lever being locked to the cabinet door in a closed position; the first end of the first transmission rod is connected to the lock rod, and the second end of the first transmission rod transversely extends to the position below the isolation grounding mechanism; a second transmission rod, a first end of which is connected to the first transmission rod and a second end of which longitudinally extends to be opposite to a gap of the isolation grounding mechanism located at the grounding position, wherein the second transmission rod is provided with a closing interlocking part along the longitudinal direction thereof, and the circuit breaker mechanism is configured to allow the closing interlocking part to move when located at the closing position; wherein, the locking lever moves to when the unblock position under the exogenic action, and the locking lever can drive the second transfer line via first transfer line and move towards the breach of keeping apart ground mechanism to when the locking lever moved to the unblock position, the second end of second transfer line moved into the breach of keeping apart ground mechanism, and locking lever and cabinet door unblock and allow the cabinet door to open.

Description

Interlocking device for switch cabinet and switch cabinet with same

Technical Field

The utility model relates to the technical field of electrical equipment, especially, relate to interlock and have its cubical switchboard for cubical switchboard.

Background

Switch cabinets, especially upper isolation and lower breaker ring main units, are widely used as important electrical equipment. In order to ensure the personal safety of operators, the upper isolation lower circuit breaker ring main unit requires that the cable chamber door can be opened after grounding of a primary circuit side in the ring main unit during installation and maintenance, and the primary circuit side can be electrified after the cable chamber door is required to be closed after the maintenance is finished.

Specifically, the isolator, earthing switch of circuit breaker looped netowrk cabinet under last isolation arrange in cabinet body top usually, and the circuit breaker is arranged in cabinet body below to need operate in proper order when the installation is maintained and make circuit breaker separating brake, isolator separating brake, earthing switch combined floodgate and circuit breaker combined floodgate, open cable chamber door again, after the maintenance is accomplished, then need operate cable chamber door in proper order and close, circuit breaker separating brake, earthing switch separating brake, isolator combined floodgate and circuit breaker combined floodgate. Because an interlocking device is not arranged between the earthing switch and the cable chamber door of the circuit breaker in the upper isolation lower circuit breaker ring main unit in the prior art, the complex operation is only carried out according to the operation specification by operators, and the defects of complex operation and low reliability of the switch cabinet obviously occur.

Accordingly, there is a need in the art for an interlock between a grounding switch and a cable chamber door within a switchgear cabinet.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an interlock that can solve above-mentioned part problem at least.

The utility model discloses still aim at providing an use above-mentioned modified interlock's cubical switchboard.

According to an aspect of the utility model, a provide an interlock for cubical switchboard, the cubical switchboard includes the cabinet body, install to the cabinet door and the holding of the cabinet body in the internal isolation ground mechanism and the circuit breaker operating device of cabinet, interlock for cubical switchboard install to the cabinet is internal and include: a door lock member including a main body portion and a lock lever movably mounted to the main body portion, the lock lever being locked to the cabinet door in a closed position; the first end of the first transmission rod is connected to the lock rod, and the second end of the first transmission rod transversely extends to the position below the isolation grounding mechanism; a second transmission rod, a first end of which is connected to the transverse transmission rod and a second end of which longitudinally extends to be opposite to the gap of the isolation grounding mechanism located at the grounding position, wherein the second transmission rod is provided with a closing interlocking part along the longitudinal direction thereof, and the breaker operating mechanism is configured to allow the closing interlocking part to move when located at the closing position; when the lock rod moves to the unlocking position under the action of external force, the lock rod can drive the second transmission rod to move to the notch of the isolation grounding mechanism through the first transmission rod, so that when the lock rod moves to the unlocking position, the second end of the second transmission rod moves into the notch of the isolation grounding mechanism, and the lock rod is unlocked by the cabinet door to allow the cabinet door to be opened.

Compared with the prior art, the utility model discloses an interlock through the lock component, first transfer line and the second transfer line that link each other, can realize only being in ground state and circuit breaker operating device and being in the condition below of combined floodgate state at isolation ground mechanism and open the cabinet door and carry out maintenance, only rely on operating personnel's experience operation in prior art relatively, greatly improved the reliability. In addition, interlock's lock component, first transfer line and second transfer line simple structure and at the internal occupation space of cabinet less, the first transfer line of horizontal extension can make the utility model provides an interlock is particularly useful for keeping apart ground mechanism and circuit breaker operating device and is not in the cubical switchboard of same longitudinal plane, and the suitability is wider.

Preferably, the door lock member further comprises a locking plate resiliently mounted to the main body portion, the locking plate applying a biasing force to the locking bar in the unlocked position to prevent the locking bar from moving to the locked position.

Preferably, the outer surface of the locking rod is provided with a radially inward concave engaging groove along the axial direction thereof, and the engaging groove is engaged with the counter locking plate when the locking rod is in the unlocking position.

Preferably, an opening and closing interlocking part which is arranged at an interval with the closing interlocking part is arranged on the second transmission rod along the axial direction of the second transmission rod, and the opening and closing interlocking part moves to lock an opening and closing tripping mechanism of the switch cabinet when the lock rod moves to the unlocking position.

Preferably, the interlocking device for the switch cabinet further comprises a locking plate mounted on the inner side of the cabinet door, and a locking opening allowing the locking rod to pass through when the cabinet door is closed in place is formed in the locking plate.

Preferably, both ends of the first transmission rod are connected to the lock rod and the second transmission rod via crank arms, respectively.

Preferably, the closing interlock is fixedly connected to the second transmission rod.

Preferably, the opening interlock is rotatably mounted to the second transmission lever.

According to another aspect of the utility model, a cubical switchboard is provided, the cubical switchboard includes the cabinet body, install to the cabinet door and the holding of the cabinet body in internal isolation ground mechanism and the circuit breaker operating device of cabinet and aforementioned interlocking device for cubical switchboard.

Preferably, the isolation grounding switch is a three-position switch.

Additional features and advantages of the invention will be set forth in part in the description which follows, and in part will be readily apparent to those skilled in the art from that description or recognized by practicing the invention as described in the detailed description which follows, together with the description of the invention.

Drawings

Embodiments of the present invention are described in detail below with reference to the attached drawing figures, wherein:

fig. 1 is a first schematic view of a switchgear cabinet according to the present invention, wherein the isolation grounding mechanism is in the grounding position, the circuit breaker operating mechanism is in the closing position, the interlock is in the locking position, the cabinet door is closed and partially removed to show details;

FIG. 2a is a front view of the switchgear cabinet of FIG. 1, with the cabinet doors shown in their entirety;

FIG. 2B is a cross-sectional view of the switchgear panel of FIG. 2a taken along B-B;

fig. 3 is a second schematic view of a switchgear cabinet according to the present invention, wherein the isolation grounding mechanism is in the grounding position, the circuit breaker operating mechanism is in the closing position, the interlock device is in the unlocking position, and the cabinet door is opened;

fig. 4a is a front view of the switchgear cabinet of fig. 3;

fig. 4b is a side view of the switchgear cabinet of fig. 3.

Description of the reference numerals:

100-a switch cabinet; 10-an interlock; 11-a door lock member; 111-a body portion; 112-locking bar; 112 a-a coupling groove; 113-a back locking plate; 12-a first transfer lever; 13-a second transmission rod; 131-a closing interlocking part; 132-a brake-separating interlocking part; 14-crank arm; 20-isolating the grounding mechanism; 21-a notch; 30-a circuit breaker operating mechanism; 40-a cabinet door; 41-locking plate; 42-locking the mouth; 50-opening tripping mechanism.

Detailed Description

Referring now to the drawings, illustrative aspects of the disclosed switchgear and interlock arrangement thereof will be described in detail. Although the drawings are provided to present some embodiments of the invention, the drawings are not necessarily to scale of particular embodiments, and certain features may be exaggerated, removed, or partially sectioned to better illustrate and explain the present disclosure. The position of some components in the drawings can be adjusted according to actual requirements on the premise of not influencing the technical effect. The appearances of the phrase "in the drawings" or similar language in the specification are not necessarily referring to all of the drawings or the examples.

Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "above", "below", and other directional terms, will be understood to have their normal meaning and refer to those directions as they normally relate to when viewing the drawings. Unless otherwise indicated, the directional terms described herein are generally in accordance with conventional directions as understood by those skilled in the art.

The terms "first," "second," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

The terms "joined," "connected," and the like as used herein, include both two components that are indirectly connected together through an intermediate layer (e.g., an adhesive, a solder, etc.) or an intermediate member (e.g., a connector, a transition member, etc.), and two components that are directly connected together without any intermediate layer (e.g., an adhesive, a solder, etc.) or intermediate member (e.g., a connector, a transition member, etc.).

Fig. 1 to 4 show a switch cabinet 100 and an interlock apparatus 10 thereof by way of example, the switch cabinet 100 may include a cabinet body, a cabinet door 40 movably mounted to the cabinet body to form a closed space in cooperation with the cabinet body, and an isolation grounding mechanism 20, especially a three-position switch and circuit breaker operating mechanism 30, accommodated in the closed space. The switchgear 100 may be, for example, an upper isolated lower circuit breaker ring main unit, and particularly, an upper isolated lower circuit breaker ring main unit in which the isolated grounding mechanism 20 and the circuit breaker operating mechanism 30 are not located in the same longitudinal plane. In the illustrated embodiment, the interlock device 10 is mountable to the inside of the cabinet and may include a door lock member 11, a first drive link 12, and a second drive link 13.

As shown, the door lock member 11 may include a main body portion 111 and a lock lever 112 movably mounted, e.g., slidably mounted, to the main body portion 111, the lock lever 112 being slidable relative to the main body portion 111 by an external force, e.g., an operator or an operating mechanism, to a locked position shown in fig. 1 or an unlocked position shown in fig. 3. The locking lever 112 passes through the locking opening 42 on the locking plate 41 mounted to the inside of the cabinet door 40 in the locking position to lock the cabinet door 40 to the cabinet body to be inhibited from opening, and moves out of the locking opening 42 to be unlocked from the locking plate 41 and thus from the cabinet door 40 in the unlocking position to allow the cabinet door 40 to be opened. Wherein the locking notch 4 is dimensioned to allow the locking bar 112 to pass through only in case the cabinet door 40 is in position relative to the cabinet body when the cabinet door 40 is closed again from the open state.

A first end of the first transmission lever 12 is mounted to the lock lever 112, for example, via the crank arm 14, so as to rotate following the sliding of the lock lever 112, and a second end of the first transmission lever 12 extends laterally below the isolated ground 20 to facilitate the engagement of the second transmission lever 13 with the isolated ground 20. The first end of the second transmission lever 13 may also be connected to the second end of the first transmission lever 12, for example via a crank arm 14, so that the second transmission lever 13 may follow the rotation of the first transmission lever 12. As shown in fig. 1, the second transmission lever 13 can thus move synchronously with the lock lever 112. The second end of the second drive link 13 extends longitudinally from its first end to a notch 21 adjacent the isolated ground mechanism 20. The transverse arrangement of the first transmission rod 12 and the longitudinal arrangement of the second transmission rod 13 are combined, so that the occupied space of the interlocking device 10 in the cabinet body can be greatly reduced, the interlocking device is suitable for the condition that the isolation grounding mechanism 20 and the circuit breaker operating mechanism 30 are not in the same longitudinal plane, and the applicability is wide.

Further, a closing interlocking part 131, such as a closing interlocking plate fixedly connected to the second transmission rod 13 and extending radially outward from the second transmission rod 13, is provided on the outer circumference of the second transmission rod 13. The closing interlock 131 of the second transmission rod 13 is designed to cooperate with a shaft pin of a breaker operating mechanism 30, such as a main shaft transmission part of the breaker, so that when the breaker operating mechanism 30 is not moved to the closing position, the breaker operating mechanism 30 is located in a moving path of the closing interlock 131 to prevent the closing interlock 131 and thus the second transmission rod 13 from moving, and as shown in fig. 1 to 3, when the breaker operating mechanism 30 is moved to the closing position, the breaker operating mechanism 30 is retracted to allow the closing interlock 131 and allow the second transmission rod 13 to move.

Further, as shown in fig. 1 to 2b, when the isolated ground engaging mechanism 20 is moved to the ground engaging position, the notch 21 of the periphery of the disk provided with the isolated ground engaging mechanism 20 is correspondingly moved downward to be opposite to the second end of the second transmission rod 13, so as to allow the second end of the second transmission rod 13 to move into the notch 21 as shown in fig. 3 to 4b, and accordingly prevent the isolated ground engaging mechanism 20 from moving away from the ground engaging position. Accordingly, when the isolated ground mechanism 20 is moved to the ground position, the isolated ground mechanism 20 abuts against the second end of the second transmission rod 13, thereby preventing the second transmission rod 13 from moving.

In this way, only in the case where the isolation ground mechanism 20 is in the ground state and the circuit breaker operating mechanism 30 is in the closed state, the movement of the second transmission rod 13 is not blocked by the circuit breaker operating mechanism 3 and the isolation ground mechanism 20, and therefore, the lock lever 112 may be moved from the locking position to the unlocking position by an external force, the second transmission rod 13 is moved to the notch 21 of the isolation ground mechanism 20 via the first transmission rod 12 in response to the movement of the lock lever 112, so that when the lock lever 112 is moved to the unlocking position, the second end of the second transmission rod 13 is moved into the notch 21 of the isolation ground mechanism 20, and the lock lever 112 effects unlocking with the cabinet door 40 to allow the cabinet door 40 to be opened. It will be appreciated that when either the isolation grounding mechanism 20 is not in the grounding position or the circuit breaker operating mechanism 30 is not in the closing position, the lock lever 112 cannot be moved and thus the cabinet door 40 cannot be opened. In summary, the mechanical interlocking of the door lock member 11, the first transmission rod 12 and the second transmission rod 13 realizes the interlocking relationship among the grounding switch, the circuit breaker and the cabinet door 40, greatly improves the reliability of the switch cabinet 100 to which the interlocking device 10 is applied, and is very simple and convenient to operate.

Alternatively, as shown in fig. 1, an opening interlocking part 132 is further disposed on an outer surface of second transmission rod 13 and axially spaced from closing interlocking part 131, and opening interlocking part 132 may be configured as an opening interlocking plate extending radially outward from second transmission rod 13. Specifically, the first end of the opening interlocking portion 13 is rotatably connected to the second transmission rod 13, the second end of the opening interlocking portion 13 is freely suspended, and the middle region between the first end and the second end of the opening interlocking portion 132 is rotatably connected to the cabinet, so that when the second transmission rod 13 moves, the opening interlocking portion 132 can rotate around the connection point with the cabinet, so that the second end of the opening interlocking portion 132 moves to a position where the opening tripping mechanism 50 of the switch cabinet 100 is locked (as shown in fig. 3 to 4 b) or unlocked (as shown in fig. 1 to 2 b).

Specifically, when the lock rod 112 moves to the unlocking position, the second transmission rod 13 moves along with the lock rod 112 via the first transmission rod 12, and the opening blocking portion 132 is correspondingly driven to the locking opening tripping mechanism 50, so that when the switch cabinet 100 is repaired and maintained, the circuit breaker of the switch cabinet 100 is prevented from opening, and the safety of an operator is ensured. Accordingly, the opening interlock 132 is also designed such that when the lock lever 112 returns to the locking position again, the opening interlock 132 is unlocked from the opening trip mechanism 50, thereby allowing the circuit breaker to open. In this way, the interlocking relationship that the opening operation of the circuit breaker can be carried out only when the cabinet door 40 is closed in place relative to the cabinet body is realized.

Alternatively, as shown in fig. 1 to 3, the door lock member 11 may further include an anti-locking plate 113 mounted to the main body portion 111 via an elastic member, the anti-locking plate 113 abutting to the outside of the lock lever 112 to bias the lock lever 112 moved to the unlock position to prevent the lock lever 112 from falling back to the lock position. Preferably, a side of the outer surface of the lock lever 112 facing the counter lock plate 113 may be provided with an engaging groove 112a recessed in a radial direction in an axial direction, the engaging groove 112a may engage the lock plate when the lock lever 112 is moved to the unlock position, and an upper end side thereof may catch the counter lock plate 113 to enhance a capability of the counter lock plate 113 to prevent the lock lever 112 from being moved to the lock position. Thus, when the locking lever 112 is to be moved from the unlocking position to the locking position, the locking lever 112 has to push the counter-locking plate 113 open and the cabinet door 40 has to be closed in position relative to the cabinet body so that the locking lever 112 can pass through the locking opening 42.

In practical applications, as shown in fig. 1 to fig. 2b, when the isolation grounding mechanism 20 moves to the grounding position and the circuit breaker operating mechanism 30 moves to the closing position, the lock lever 112 can be toggled upward, the lock lever 112 moves out of the locking notch 42 of the locking plate 41, the first transmission rod 12 rotates and drives the second transmission rod 13 to move upward, the second end of the second transmission rod 13 moves into the notch 21 of the isolation grounding mechanism 20, and the opening interlocking portion 132 is driven to lock the opening tripping mechanism 50, as shown in fig. 3 to fig. 4b, at this time, an operator can open the cabinet door 40 for maintenance.

After the overhaul and maintenance are completed, an operator can close the cabinet door 40 in place, the lock rod 112 is shifted downwards, the lock rod 112 moves into the lock opening 42 of the lock plate 41, the first transmission rod 12 rotates to drive the second transmission rod 13 to move downwards, the second end of the second transmission rod 13 moves out of the notch 21 of the isolation grounding mechanism 20, and the opening interlocking part 132 is driven to unlock the opening tripping mechanism 50, as shown in fig. 1 to 2b, at this time, the operator can operate the circuit breaker operating mechanism 30 to move to the opening position, the isolation grounding mechanism 20 moves to the closing position, and the circuit breaker operating mechanism 30 moves to the closing position again.

It should be understood that although the description is in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.

Claims (10)

1. An interlock (10) for a switchgear panel (100), said switchgear panel (100) comprising a cabinet body, a cabinet door (40) mounted to said cabinet body, and an isolation grounding mechanism (20) and a circuit breaker operating mechanism (30) housed within said cabinet body, characterized in that said switchgear panel (100) is mounted to said cabinet body with the interlock (10) and comprises:

a door lock member (11) including a main body portion (111) and a lock lever (112) movably mounted to the main body portion (111), the lock lever (112) being locked to the cabinet door (40) in a closed position;

a first transmission rod (12) with a first end connected to the lock rod (112) and a second end extending transversely below the isolation grounding mechanism (20);

a second transmission rod (13) having a first end connected to the first transmission rod (12) and a second end longitudinally extended to be opposite to the notch (21) of the isolation grounding mechanism (20) located at the grounding position, the second transmission rod (13) being provided with a closing interlocking part (131) along the longitudinal direction thereof, the circuit breaker operating mechanism (30) being configured to allow the closing interlocking part (131) to move when located at the closing position;

wherein, locking lever (112) move to when unblock position under the exogenic action, locking lever (112) can via first transfer line (12) drive second transfer line (13) move to keep apart breach (21) of ground mechanism (20), with when locking lever (112) move to unblock position, the second end immigration of second transfer line (13) keep apart breach (21) of ground mechanism (20), and locking lever (112) with cabinet door (40) unblock and allow cabinet door (40) are opened.

2. The interlock device (10) for a switchgear panel (100) according to claim 1, wherein said door lock member (11) further comprises a counter-latch plate (113) elastically mounted to said main body portion (111), said counter-latch plate (113) applying a biasing force to said lock lever (112) in the unlocked position to prevent said lock lever (112) from moving to the locked position.

3. The interlock device (10) for a switchgear (100) according to claim 2, wherein the lock lever (112) is provided on an outer surface thereof with a radially inward concave engaging groove (112 a) along an axial direction thereof, the engaging groove (112 a) being engaged to the counter-locking plate (113) when the lock lever (112) is in the unlocking position.

4. The interlocking device (10) for a switchgear (100) according to claim 1, wherein the second transmission rod (13) is provided with an opening interlocking portion (132) spaced apart from the closing interlocking portion (131) along an axial direction thereof, and the opening interlocking portion (132) moves to an opening tripping mechanism (50) for locking the switchgear (100) when the lock rod (112) moves to the unlocking position.

5. The interlocking device (10) for a switch cabinet (100) according to claim 1, characterized in that the interlocking device (10) for a switch cabinet (100) further comprises a locking plate (41) mounted to the inner side of the cabinet door (40), and the locking plate (41) is provided with a locking notch (42) allowing the locking bar (112) to pass through when the cabinet door (40) is closed in place.

6. The interlock device (10) for a switchgear panel (100) according to claim 1, characterized in that both ends of the first transmission lever (12) are connected to the locking lever (112) and the second transmission lever (13) via a crank arm (14), respectively.

7. Interlocking device (10) for a switchgear panel (100) according to claim 1, characterised in that said closing interlocking section (131) is fixedly connected to said second transmission rod (13).

8. Interlocking device (10) for a switchgear cabinet (100) according to claim 4, characterised in that the opening interlock (132) is rotatably mounted to the second transmission rod (13).

9. A switchgear panel (100), characterized in that the switchgear panel (100) comprises a cabinet body, a cabinet door (40) mounted to the cabinet body, and an isolation grounding mechanism (20) and a circuit breaker operating mechanism (30) housed in the cabinet body, and an interlocking device (10) for a switchgear panel (100) according to any one of claims 1 to 8.

10. The switchgear panel (100) according to claim 9 wherein said isolating and grounding mechanism (20) is a three-position switch.

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