High-voltage interlocking structure of high-voltage electrical cabinet

Abstract

This utility model discloses a high-voltage interlocking structure for a high-voltage electrical cabinet, including a door cover and a cabinet body. The door cover includes a first door cover, a second door cover, and several third door covers. The first door cover covers the cabinet body portion equipped with a locking structure. The locking structure is used to lock the door cover lock on the second door cover. The second door cover presses down on the third door covers via an interlocking pressure plate. The locking structure includes a flip-top cover plate, a locking element, and a maintenance switch. The flip-top cover plate is rotatably mounted inside the cabinet body. The locking element is located on the flip-top cover plate. The maintenance switch is used to lock and unlock the flip-top cover plate. After the maintenance switch locks the flip-top cover plate, the locking element engages with the latch of the door cover lock to restrict the rotation of the latch. This utility model achieves the function of allowing only the first door cover, the second door cover, and the third door cover to be opened sequentially by setting a locking structure to lock the door cover lock on the second door cover and setting an interlocking pressure plate to press down on the third door covers. The locking structure of this application has a simple structure, the parts are regular in shape and easy to process, and the required installation space is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of electrical facilities technology, and in particular to a high-voltage interlocking structure for a high-voltage electrical cabinet. Background Technology

[0002] To prevent operator misoperation and ensure maintenance is only performed after power is off, electrical equipment is typically equipped with interlocking structures. Electrical and mechanical interlocks are widely used in various electrical control systems, especially in high-voltage electrical cabinets or battery cabinets. Mechanical interlocks are implemented through mechanical components. A common structure prevents two switches from closing simultaneously by using a mechanical lever to lock the other switch in place when one is closed. This ensures that the operating handle of the isolating switch cannot be activated when the circuit breaker is open, thus preventing operation under load. Mechanical interlocks offer high reliability and effectively prevent misoperation, ensuring the safety of equipment and personnel. However, existing mechanical interlocks with lever structures suffer from complex structures, difficult-to-manufacture parts, and require significant installation space. Utility Model Content

[0003] This utility model provides a high-voltage interlocking structure for a high-voltage electrical cabinet to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A high-voltage interlocking structure for a high-voltage electrical cabinet includes a door cover and a cabinet body. The door cover is installed on the cabinet body by a door cover lock. The door cover includes a first door cover, a second door cover, and a plurality of third door covers. The first door cover is located on one side of the second door cover. The first door cover covers the cabinet body part equipped with a locking structure. The locking structure is used to lock the door cover lock on at least one of the second door covers. The second door cover presses down on at least one of the third door covers by an interlocking pressure plate.

[0006] The locking structure includes: a flip cover, a locking element, and a maintenance switch. The flip cover is rotatably mounted inside the cabinet. The locking element is mounted on the flip cover. The maintenance switch is used to lock and unlock the flip cover. After the maintenance switch locks the flip cover, the locking element engages with the latch of the door cover lock to restrict the rotation of the latch.

[0007] Preferably, the flip cover has a limit hole, the maintenance switch is installed on the cabinet and passes through the limit hole, and the edge of the limit hole of the flip cover engages with the maintenance switch after rotation to limit the flip cover from continuing to rotate.

[0008] Preferably, at least two maintenance switches are provided, and the number of limit holes is consistent with the number of maintenance switches and corresponds one-to-one.

[0009] Preferably, the locking element includes a limiting groove. After the maintenance switch locks the flip cover, the latch of the door cover lock engages in the limiting groove of the locking element to restrict rotation.

[0010] Preferably, the locking component includes: a connecting plate, a locking main board, and a bending baffle. The connecting plate is fixedly mounted on the flip cover. One end of the locking main board is fixedly connected to the connecting plate, and the other end is fixedly connected to the bending baffle. The bending baffle bends toward the latch of the corresponding door cover lock. A limiting groove is formed on the bending baffle and extends from the end away from the locking main board through the locking main board.

[0011] Preferably, the flip cover includes: a first plate, a transition plate and a second plate, a limiting hole is provided on the first plate, the first plate and the second plate are connected by the transition plate, and the second plate is rotatably connected to the edge of the locking structure mounting plate of the cabinet; when the first plate rotates to fit the locking structure mounting plate, the second plate is perpendicular to the locking structure mounting plate.

[0012] Preferably, the flip cover has a through hole, and the locking screw passes through the through hole and is threaded into the cabinet body.

[0013] Preferably, the first door cover is installed on the cabinet body by a number of door cover locks and a main lock.

[0014] Preferably, the main lock includes: a main lock head, a main lock tongue, and a lock ring. The lock ring is fixed to the cabinet body. Rotating the main lock head causes the main lock tongue to extend into the locking hole of the lock ring and exit the locking hole of the lock ring.

[0015] Preferably, the second door cover presses down on at least one third door cover by an interlocking pressure plate, and a plurality of third door covers are installed with interlocking pressure plates on the third door cover of the previous level in the order of opening.

[0016] Beneficial effects:

[0017] This application discloses a high-voltage interlocking structure for a high-voltage electrical cabinet. It uses a locking mechanism to lock the second door cover lock, and a maintenance switch to lock the flip-top cover, thus limiting the flip-top cover's rotation. This causes the locking element to engage with the door cover lock's latch to restrict latch rotation. Furthermore, an interlocking plate presses down on the third door cover, achieving an interlocking function, ensuring that only the first, second, and third door covers can be opened sequentially. The locking structure of this application is simple in structure, the parts are regular in shape and easy to manufacture, and the required installation space is greatly reduced. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the high-voltage interlocking structure of a high-voltage electrical cabinet disclosed in this utility model;

[0020] Figure 2 for Figure 1 Sectional view of AA;

[0021] Figure 3 for Figure 2 A magnified view of part B in the image;

[0022] Figure 4 This is a top view of a high-voltage interlocking structure of a high-voltage electrical cabinet disclosed in this utility model;

[0023] Figure 5 for Figure 4 Sectional view of CC;

[0024] Figure 6 for Figure 5 A magnified view of part D;

[0025] Figure 7 This is a schematic diagram of the locking component of a high-voltage interlocking structure for a high-voltage electrical cabinet disclosed in this utility model;

[0026] Figure 8 This is a schematic diagram of the flip-top cover of a high-voltage interlocking structure for a high-voltage electrical cabinet disclosed in this utility model.

[0027] 1. Cabinet body; 11. Locking structure mounting plate; 2. Door cover lock; 21. Lock tongue; 22. Lock cylinder; 31. First door cover; 32. Second door cover; 33. Third door cover; 4. Interlocking pressure plate;

[0028] 51. Flip-top cover; 511. Limiting hole; 512. First plate; 513. Transition plate; 514. Second plate; 52. Locking component; 521. Limiting groove; 522. Connecting plate; 523. Locking main board; 524. Bending baffle; 53. Maintenance switch;

[0029] 6. Main lock; 61. Main lock cylinder; 62. Main lock tongue; 63. Lock ring. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] A high-voltage interlocking structure for a high-voltage electrical cabinet, combined with Figures 1-8 As shown, the cabinet includes a door cover and a cabinet body 1. The door cover is installed on the cabinet body 1 by a door cover lock 2. The door cover includes: a first door cover 31, a second door cover 32 and several third door covers 33. The first door cover 31 is located on one side of the second door cover 32. The first door cover 31 covers the cabinet body part with a locking structure. The locking structure is used to lock the door cover lock 2 on at least one of the second door covers 32. The second door cover 32 presses down on at least one of the third door covers 33 by a chain pressure plate 4.

[0032] The locking structure includes: a flip cover 51, a locking element 52, and a maintenance switch 53. The flip cover 51 is rotatably installed inside the cabinet 1. The locking element 52 is installed on the flip cover 51. The maintenance switch 53 is used to lock and unlock the flip cover 51. After the maintenance switch 53 locks the flip cover 51, the locking element 52 engages with the latch 21 of the door cover lock 2 to restrict the rotation of the latch 21.

[0033] This application uses a locking structure to lock the door cover lock 2 on the second door cover 32, and a maintenance switch 53 to lock the flip cover 51, thereby limiting the flipping of the flip cover 51. This causes the locking element 52 to engage with the latch 21 of the door cover lock 2 to restrict the rotation of the latch 21. Furthermore, an interlocking pressure plate 4 is provided to press down the third door cover 33, achieving an interlocking function. This ensures that only the first door cover 31, the second door cover 32, and the third door cover 33 can be opened sequentially. The locking structure of this application is simple, the parts are regular in shape and easy to process, and the required installation space is greatly reduced.

[0034] Preferably, the flip cover 51 has a limit hole 511, and the maintenance switch 53 is installed on the cabinet 1 and passes through the limit hole 511. After the edge of the limit hole 511 of the flip cover 51 rotates, it engages with the maintenance switch 53 to limit the flip cover 51 from continuing to rotate.

[0035] Specifically, the limiting hole 511 is rectangular in shape. The maintenance switch 53 passes through the limiting hole 511. After the flip cover 51 rotates by 10°-20°, the edge of the limiting hole 511 away from the axis of rotation is engaged in the groove of the maintenance switch 53 to achieve a locking action, thereby restricting the flip cover 51 from continuing to rotate and ensuring that the locking member 52 still restricts the rotation of the locking tongue 21.

[0036] Preferably, at least two maintenance switches 53 are provided, and the number of limiting holes 511 is consistent with the number of maintenance switches 53 and corresponds one-to-one. The maintenance switches 53 are arranged in a direction parallel to the rotation axis of the flip cover 51 to improve the reliability of the limiting of the flip cover 51.

[0037] Preferably, the locking member 52 includes a limiting groove 521. After the maintenance switch 53 locks the flip cover 51, the latch 21 of the door cover lock 2 is engaged in the limiting groove 521 of the locking member 52 to restrict rotation. This prevents the latch 21 from rotating to the open position when the lock head 22 of the door cover lock 2 is rotated, thus preventing the door cover lock 2 of the second door cover 32 from being unlocked and the second door cover 32 from being opened.

[0038] Preferably, the locking component 52 includes: a connecting plate 522, a locking main plate 523, and a bending baffle 524. The connecting plate 522 is fixedly mounted on the flip cover plate 51. One end of the locking main plate 523 is fixedly connected to the connecting plate 522, and the other end is fixedly connected to the bending baffle 524. The bending baffle 524 bends toward the corresponding latch 21 of the door cover lock 2. A limiting groove 521 is formed on the bending baffle 524 and extends from the end away from the locking main plate 523, penetrating through the locking main plate 523. After the latch 21 is engaged in the limiting groove 521, the bending baffle 524 prevents the latch 21 from rotating upward and downward.

[0039] Specifically, the connecting plate 522, the locking main board 523, and the bending baffle 524 are integrally formed, for example, using a bending process commonly used in chassis structures. The connecting plate 522, locking main board 523, and bending baffle 524 are formed by sequentially bending a single sheet of material. The connecting plate 522 and the locking main board 523 form an obtuse angle, with the locking main board 523 facing the latch 21. The bending baffle 524 forms a right angle with the locking main board 523, with the bending baffle 524 bending towards the latch 21. The limiting groove 521 is a rectangular opening cut inwards from the edge of the entire sheet of material, formed after bending to improve the strength of the locking component 52. The connecting plate 522 is fixed to the flip cover 51 by screws. The limiting groove 521 extends to the middle of the locking main board 523, so that the limiting groove 521 can avoid the nut used for connecting the lock tongue 21 to the lock head 22, and ensure that the bending baffle 524 can always restrict the lock tongue 21 before the maintenance switch 53 jams the flip cover 51.

[0040] Specifically, a locking structure mounting plate 11 is provided inside the cabinet 1, which is used to install the locking structure.

[0041] Preferably, the flip cover 51 includes a first plate 512, a transition plate 513, and a second plate 514. A limiting hole 511 is provided on the first plate 512. The first plate 512 and the second plate 514 are connected by the transition plate 513. The second plate 514 is rotatably connected to the edge of the locking structure mounting plate 11 of the cabinet 1. When the first plate 512 rotates to fit against the locking structure mounting plate 11, the second plate 514 is perpendicular to the locking structure mounting plate 11. The cooperation between the second plate 514 and the locking structure mounting plate 11 can limit the maximum rotation angle of the first plate 512 and prevent the first plate 512 from flipping to the back of the locking structure mounting plate 11.

[0042] Specifically, the first plate 512, the transition plate 513, and the second plate 514 are integrally formed, for example, by bending a single sheet of material. The second plate 514 is connected to the back of the locking structure mounting plate 11 via a hinge, allowing the first plate 512 to rotate on one side of the locking structure mounting plate 11. The first plate 512 is located in front of the locking structure mounting plate 11. When locked, the first plate 512 is parallel to the locking structure mounting plate 11; when unlocked, the first plate 512 is perpendicular to the locking structure mounting plate 11, and the second plate 514 is attached to the back of the locking structure mounting plate 11.

[0043] Preferably, the flip cover 51 is provided with a through hole, and the locking screw passes through the through hole and is threaded to the cabinet 1. The addition of the locking screw further prevents misoperation. The flip cover 51 can only be rotated after the locking screw is removed and the maintenance switch 53 is released.

[0044] Specifically, the edge of the first plate 512 away from the transition plate 513 is bent towards the locking structure mounting plate 11, such that after the bent edge abuts against the locking structure mounting plate 11, the first plate 512 and the locking structure mounting plate 11 are parallel and spaced apart. Two through holes are provided on the first plate 512, and two spacers are provided between the first plate 512 and the locking structure mounting plate 11 corresponding to the through holes. Two locking screws pass through the first plate 512 and are locked onto the locking structure mounting plate 11, thereby locking the first plate 512 onto the locking structure mounting plate 11.

[0045] Preferably, the first door cover 31 is installed on the cabinet 1 by a plurality of door cover locks 2 and a main lock 6. In this embodiment, the first door cover 31 is installed by a main lock 6 located on the left side and four door cover locks 2 located at the four corners.

[0046] Preferably, the main lock 6 includes a main lock head 61, a main lock tongue 62, and a lock ring 63. The lock ring 63 is fixed to the cabinet body 1. Rotating the main lock head 61 causes the main lock tongue 62 to extend into and exit the locking hole of the lock ring 63. The telescopic locking structure of the main lock 6 and the rotary locking structure of the door cover lock 2 ensure more reliable locking of the first door cover 31.

[0047] Preferably, the second cover 32 presses down on at least one third cover 33 by interlocking pressure plates 4, and a plurality of third covers 33 are installed with interlocking pressure plates 4 on the previous third cover 33 in the order of opening. In this embodiment, there are three third covers 33, two of which are located on the side of the second cover 32 away from the first cover 31 and below the second cover 32, respectively, and the remaining third cover 33 is located diagonally opposite the second cover 32. Two interlocking pressure plates 4 are installed on the second cover 32 by screws, and the two interlocking pressure plates 4 press down on the third cover 33 on its side and the third cover 33 below it, respectively. The third cover 33 on the side of the second cover 32 is provided with interlocking pressure plates 4, which press down on the remaining third cover 33.

[0048] The working principle of the device in this application is as follows:

[0049] When maintenance is required, firstly, unlock the main lock 6 and the door cover lock 2 of the first door cover 31 and remove the first door cover 31; secondly, remove the locking screws and then pull out the maintenance switch to unlock the flip cover 51; then, rotate the flip cover 51 90° so that the locking member 52 disengages from the latch 21 of the door cover lock 2 of the second door cover 32, thereby releasing the restriction of the latch 21 of the second door cover 32; then, unlock the door cover lock 2 of the second door cover 32 and remove the second door cover 32; finally, unlock the door cover lock 2 of the third door cover 33 in sequence and remove all the third door covers 33 in sequence; ultimately, only when the maintenance switch is pulled out to disconnect the power can the first door cover 31, the second door cover 32 and the third door cover 33 be opened in sequence for routine maintenance.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-voltage interlocking structure for a high-voltage electrical cabinet, comprising a door cover and a cabinet body (1), wherein the door cover is installed on the cabinet body (1) by a door cover lock (2), characterized in that, The door cover includes: a first door cover (31), a second door cover (32) and a plurality of third door covers (33), wherein the first door cover (31) is located on one side of the second door cover (32); the first door cover (31) covers the cabinet part provided with a locking structure, wherein the locking structure is used to lock the door cover lock (2) on at least one of the second door covers (32), and the second door cover (32) presses down on at least one third door cover (33) through a chain pressure plate (4); The locking structure includes: a flip cover (51), a locking element (52), and a maintenance switch (53). The flip cover (51) is rotatably disposed inside the cabinet (1). The locking element (52) is disposed on the flip cover (51). The maintenance switch (53) is used to lock and unlock the flip cover (51). After the maintenance switch (53) locks the flip cover (51), the locking element (52) engages with the latch (21) of the door cover lock (2) to restrict the rotation of the latch (21).

2. The high-voltage interlocking structure of a high-voltage electrical cabinet according to claim 1, characterized in that, The flip cover (51) has a limiting hole (511). The maintenance switch (53) is installed on the cabinet (1) and passes through the limiting hole (511). After the edge of the limiting hole (511) of the flip cover (51) rotates, it engages with the maintenance switch (53) to restrict the flip cover (51) from continuing to rotate.

3. The high-voltage interlocking structure of a high-voltage electrical cabinet according to claim 2, characterized in that, At least two maintenance switches (53) are provided, and the number of limiting holes (511) is consistent with the number of maintenance switches (53) and corresponds one-to-one.

4. The high-voltage interlocking structure of a high-voltage electrical cabinet according to claim 2, characterized in that, The locking element (52) includes a limiting groove (521). After the maintenance switch (53) locks the flip cover (51), the latch (21) of the door cover lock (2) is engaged in the limiting groove (521) of the locking element (52) to restrict rotation.

5. The high-voltage interlocking structure of a high-voltage electrical cabinet according to claim 4, characterized in that, The locking component (52) includes: a connecting plate (522), a locking main board (523), and a bending baffle (524). The connecting plate (522) is fixed on the flip cover (51). One end of the locking main board (523) is fixedly connected to the connecting plate (522), and the other end is fixedly connected to the bending baffle (524). The bending baffle (524) bends toward the latch (21) of the corresponding door cover lock (2). The limiting groove (521) is opened on the bending baffle (524) and extends from the end away from the locking main board (523) through the locking main board (523).

6. The high-voltage interlocking structure of a high-voltage electrical cabinet according to claim 2, characterized in that, The flip cover (51) includes: a first plate (512), a transition plate (513) and a second plate (514). The limiting hole (511) is provided on the first plate (512). The first plate (512) and the second plate (514) are connected by the transition plate (513). The second plate (514) is rotatably connected to the edge of the locking structure mounting plate (11) of the cabinet (1). When the first plate (512) rotates to fit the locking structure mounting plate (11), the second plate (514) is perpendicular to the locking structure mounting plate (11).

7. The high-voltage interlocking structure of a high-voltage electrical cabinet according to claim 2, characterized in that, The flip cover (51) has a through hole, and the locking screw passes through the through hole and is threaded to the cabinet (1).

8. The high-voltage interlocking structure of a high-voltage electrical cabinet according to claim 1, characterized in that, The first door cover (31) is installed on the cabinet (1) by a number of door cover locks (2) and a main lock (6).

9. The high-voltage interlocking structure of a high-voltage electrical cabinet according to claim 8, characterized in that, The main lock (6) includes: a main lock head (61), a main lock tongue (62) and a lock ring (63). The lock ring (63) is fixed on the cabinet (1). Rotating the main lock head (61) causes the main lock tongue (62) to extend into the locking hole of the lock ring (63) and exit the locking hole of the lock ring (63).

10. The high-voltage interlocking structure of a high-voltage electrical cabinet according to claim 1, characterized in that, The second door cover (32) presses down on at least one third door cover (33) by interlocking pressure plate (4), and the interlocking pressure plate (4) is installed on the previous third door cover (33) in the order of opening.

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