High-voltage switch cabinet handcart locking front lower door interlocking device

Abstract

The utility model belongs to the field of switch cabinets, in particular to a high-voltage switch cabinet handcart locking front lower door interlocking device, which comprises a cabinet body, a front middle door and a front lower door, a lock catch is arranged on the inner side of the front middle door, a chassis truck is arranged on the cabinet body close to the front middle door, and the chassis truck is provided with a chassis truck operation hole and a door interlocking hook. The door interlocking hook can be controlled to be clamped with the lock catch through the chassis operation hole, the front middle door is locked through mechanical interlocking, an electromagnetic lock is replaced by the mechanical interlocking, and the reliability of the product is improved.

Description

Technical Field

[0001] The utility model belongs to the field of switch cabinets, and particularly relates to an interlocking device for the front lower door before the handcart of a high-voltage switch cabinet is locked. Background Art

[0002] When there is no need to install primary live components in the front cable chamber of the existing cabinet, the front lower door can be directly opened and closed without any interlock; however, when primary live components are installed in the current cable chamber, in order to meet the five-prevention requirement of "preventing misentry into the live compartment", the front lower door must be provided with an interlocking device; and the conventional solution is to install an electromagnetic lock on the cabinet door, generally using electrical interlock, which requires an external control power supply as a necessary condition, and the reliability will be reduced accordingly; moreover, the added electromagnetic lock also requires secondary wiring; the overall cost of components and labor costs will also increase. Content of the Utility Model

[0003] To solve the problems mentioned in the above background art, it is proposed to lock the front middle door through a mechanical interlock, replace the electromagnetic lock with a mechanical interlock, set a second baffle on the front lower door, and lock the front lower door by abutting against the second baffle while the front middle door is locked, canceling secondary wiring; improving the reliability of the product and saving costs at the same time.

[0004] The technical solution of the utility model: An interlocking device for the front lower door before the handcart of a high-voltage switch cabinet is locked, including a cabinet body, a front middle door, and a front lower door. A lock catch is provided inside the front middle door. A chassis truck is provided near the front middle door of the cabinet body. The chassis truck is provided with a chassis truck operation hole and a door interlock hook. The door interlock hook can be controlled to engage with the lock catch through the chassis operation hole. First limiting plates and second limiting plates are provided on both sides of the chassis truck operation hole. A first baffle is provided inside the front middle door, and a second baffle is provided inside the front lower door. A first pulley and a second pulley are provided on the cabinet body. A corresponding first travel mechanism and a second travel mechanism are respectively provided on one side of the first pulley and the second pulley. The first travel mechanism is connected to the first limiting plate through a first spring; the second travel mechanism is connected to the second limiting plate through a second spring.

[0005] Preferably, when the front middle door and the front lower door are closed, the first baffle abuts against the first pulley, and the second baffle abuts against the second pulley. At this time, the first pulley abuts against the first travel mechanism to act, and the second pulley abuts against the second travel mechanism to act. When both the first travel mechanism and the second travel mechanism are in the abutting state, the first limiting plate and the second limiting plate are respectively driven by the first spring and the second spring to move away from the chassis truck operation hole, and the chassis truck operation hole is unlocked.

[0006] Preferably, a protrusion is provided on one side of the latch, and a metal ring is provided outside the operating hole of the chassis truck. After the operating hole of the chassis truck is unlocked, the crank can be inserted to push the metal ring to the inside, so that the crank is fixedly connected to the operating hole of the chassis truck, facilitating the rotation of the operating hole of the chassis truck and driving the door interlock hook to rotate and latch the protrusion, making the front middle door in a locked state.

[0007] Preferably, the second baffle is located between the cabinet body and the front middle door. When the front middle door is closed, the second baffle is pressed inside the front middle door.

[0008] Preferably, both the front middle door and the front lower door are provided with dust-proof nets to prevent dust from entering.

[0009] Preferably, the first pulley and the second pulley can be rotatably inserted into the cabinet body.

[0010] Preferably, the chassis truck is provided with a handle, and the handle is fixedly connected to the positioning plate.

[0011] Preferably, the positioning plate is located outside the chassis truck, and the positioning plate is elastically connected to the chassis truck. By moving the two handles towards the operating hole of the chassis truck, the positioning plate is driven to move inside the chassis truck, facilitating the pushing of the chassis truck into the cabinet body.

[0012] Compared with the prior art, the present utility model provides a handcart locking front lower door interlock device for a high-voltage switch cabinet, having the following beneficial effects: the front middle door is locked through a mechanical interlock, replacing the electromagnetic lock with a mechanical interlock. By arranging a second baffle on the front lower door and abutting against the second baffle to lock the front lower door while the front middle door is locked, the front middle door and the front lower door are locked simultaneously; the reliability of the product is improved, secondary wiring is cancelled, and costs are saved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0014] Figure 1 It is a schematic diagram of the open state of the front middle door and the front lower door in the embodiment of the present utility model.

[0015] Figure 2 is Figure 1 The enlarged view in the direction of A of.

[0016] Figure 3 It is a schematic diagram of the closed state of the front middle door and the front lower door in the embodiment of the present utility model.

[0017] Figure 4 is Figure 3 The enlarged view in the direction of B of.

[0018] Figure 5 is Figure 3 the enlarged view in the C direction of

[0019] Figure 6 This is a schematic diagram of unlocking and installing the crank of the chassis truck in the embodiment of the present utility model.

[0020] Figure 7 is Figure 6 the enlarged view in the D direction of

[0021] Figure 8 This is a schematic diagram of the embodiment of the present utility model.

[0022] Reference numerals

[0023] 1 - Cabinet; 11 - First pulley; 12 - Second pulley; 13 - First stroke mechanism; 14 - Second stroke mechanism; 15 - First spring; 16 - Second spring; 2 - Front middle door; 21 - Lock catch; 211 - Protrusion; 22 - First baffle; 3 - Front lower door; 31 - Second baffle; 4 - Chassis truck; 41 - Chassis truck operation hole; 42 - Door interlock hook; 43 - First limit plate; 44 - Second limit plate; 45 - Metal ring; 46 - Handle; 47 - Positioning plate; 5 - Crank; 6 - Dust screen; Detailed implementation manners

[0024] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments.

[0025] Generally, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model.

[0026] Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0029] Such as Figures 1 to 8As shown in the figure, it includes a cabinet body 1, a front middle door 2, and a front lower door 3. A latch 21 is provided inside the front middle door 2. A chassis truck 4 is provided near the front middle door 2 of the cabinet body 1. The chassis truck 4 is provided with a chassis truck operation hole 41 and a door interlock hook 42. The door interlock hook 42 can be controlled to latch the latch 21 through the chassis operation hole 41. First limit plates 43 and second limit plates 44 are provided on both sides of the chassis truck operation hole 41. A first baffle 22 is provided inside the front middle door 2, and a second baffle 31 is provided inside the front lower door 3. First pulleys 11 and second pulleys 12 are provided on the cabinet body 1. A corresponding first travel mechanism 13 and second travel mechanism 14 are provided on one side of each of the first pulleys 11 and second pulleys 12 respectively. The first travel mechanism 13 is connected to the first limit plate 43 through a first spring 15. The second travel mechanism 14 is connected to the second limit plate 44 through a second spring 16. When the front middle door 2 and the front lower door 3 are closed, the first baffle 22 abuts against the first pulley 11, and the second baffle 31 abuts against the second pulley 12. At this time, the first pulley 11 abuts against the first travel mechanism 13 to act, and the second pulley 12 abuts against the second travel mechanism 14 to act. When both the first travel mechanism 13 and the second travel mechanism 14 are in the abutting state, the first limit plate 43 and the second limit plate 44 are respectively driven by the first spring 15 and the second spring 16 to move away from the chassis truck operation hole 41, and the chassis truck operation hole 41 is unlocked. A protrusion 211 is provided on one side of the latch 21. A metal ring 45 is provided outside the chassis truck operation hole 41. After the chassis truck operation hole 41 is unlocked, inserting a crank 5 can push the metal ring 45 to the inside, so that the crank 5 is fixedly connected to the chassis truck operation hole 41, facilitating rotating the chassis truck operation hole 41 to drive the door interlock hook 42 to rotate and latch the protrusion 211, so that the front middle door 2 is in a locked state. The second baffle 31 is located between the cabinet body 1 and the front middle door 2. When the front middle door 2 is closed, the second baffle 31 is pressed inside the front middle door 2. Further, only when the front lower door 3 is closed can the front middle door 2 be closed, that is, the second pulley 12 acts first, and then the first pulley 11 acts. The front middle door is locked through a mechanical interlock. The electromagnetic lock is replaced by a mechanical interlock. By providing a second baffle on the front lower door and locking the front lower door by abutting against the second baffle while the front middle door is locked, the front middle door and the front lower door are locked simultaneously, improving the reliability of the product.

[0030] Dust-proof nets 6 are provided on both the front middle door 2 and the front lower door 3 to prevent dust from entering. The first pulleys 11 and the second pulleys 12 are rotatably inserted into the cabinet body 1. The chassis truck 4 is provided with a handle 46, and the handle 46 is fixedly connected to a positioning plate. The positioning plate 47 is located outside the chassis truck 4, and the positioning plate 47 is elastically connected to the chassis truck 4. By moving the two handles towards the chassis truck operation hole, the positioning plate 47 is driven to move inside the chassis truck 4, facilitating pushing the chassis truck 4 into the cabinet body 1 and preventing the chassis truck 4 from being accidentally pushed into the cabinet body 1.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

Claims

1. A high-voltage switch cabinet trolley locking front lower door interlocking device, comprising a cabinet body, a front middle door, and a front lower door, characterized in that: A lock is provided on the inner side of the front middle door, and a chassis trolley is provided on the cabinet body near the front middle door. The chassis trolley is provided with a chassis trolley operating hole and a door interlock hook, and the door interlock hook can be controlled to engage the lock by the chassis operating hole; a first limit plate and a second limit plate are provided on both sides of the chassis trolley operating hole; a first baffle is provided on the inner side of the front middle door, and a second baffle is provided on the inner side of the front lower door; a first pulley and a second pulley are provided on the cabinet body, and corresponding first stroke mechanisms and second stroke mechanisms are respectively provided on one side of the first pulley and the second pulley; the first stroke mechanism is connected to the first limit plate by a first spring; and the second stroke mechanism is connected to the second limit plate by a second spring.

2. A high-voltage switch cabinet trolley locking front lower door interlocking device as claimed in claim 1, characterized in that: When the front middle door and the front lower door are closed, the first baffle plate abuts against the first pulley, and the second baffle plate abuts against the second pulley. At this time, the first pulley abuts against the first stroke mechanism and the second pulley abuts against the second stroke mechanism. When the first stroke mechanism and the second stroke mechanism are both in an abutting state, the first limit plate and the second limit plate are driven by the first spring and the second spring respectively to move away from the chassis vehicle operating hole, and the chassis vehicle operating hole is unlocked.

3. A high-voltage switch cabinet trolley locking front lower door interlocking device as claimed in claim 1, characterized in that: A protrusion is provided on one side of the lock buckle, and a metal ring is provided on the outer side of the chassis vehicle operating hole. When the chassis vehicle operating hole is unlocked, the metal ring can be pushed inside by inserting the crank, so that the crank is fixedly connected to the chassis vehicle operating hole, which is convenient for rotating the chassis vehicle operating hole, driving the door interlocking hook to rotate and engage the protrusion, so that the front middle door is in a locked state.

4. A high-voltage switch cabinet trolley locking front lower door interlocking device as claimed in claim 1, characterized in that: The second baffle is located between the cabinet body and the front middle door. When the front middle door is closed, the second baffle is pressed into the front middle door.

5. The interlocking device for the lower door before locking the high-voltage switch cabinet trolley according to claim 1, characterized in that: The front middle door and the front lower door are both provided with dustproof nets to prevent dust from entering.

6. A high-voltage switch cabinet trolley locking front lower door interlocking device as claimed in claim 1, characterized in that: The first pulley and the second pulley are rotatably inserted into the cabinet.

7. A high-voltage switch cabinet trolley locking front lower door interlocking device as claimed in claim 1, characterized in that: The chassis vehicle is provided with a handle, and the handle is fixedly connected to the positioning plate.

8. A high-voltage switch cabinet trolley locking front lower door interlocking device as claimed in claim 7, characterized in that: The positioning plate is located outside the chassis vehicle, and the positioning plate is elastically connected to the chassis vehicle. By moving the two handles toward the operating holes of the chassis vehicle, the positioning plate is driven to move inside the chassis vehicle, making it easier to push the chassis vehicle into the cabinet.

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