High-voltage switch cabinet with locking system

Abstract

The utility model relates to a high-voltage switch cabinet with a locking system. The high-voltage switch cabinet comprises a high-voltage switch cabinet, a grounding knife-switch and the locking system, the locking system comprises a safety lock I arranged at the high-voltage switch cabinet and a safety lock III arranged at the grounding knife switch; the grounding knife switch is locked through the third safety lock, and when the high-voltage switch of the high-voltage switch cabinet is not pushed out, the key of the first safety lock is locked; when the high-voltage switch of the high-voltage switch cabinet is pushed out, the key of the safety lock I is unlocked; the third safety lock is unlocked through a key of the first safety lock. Before the grounding knife switch is switched on, the first safety lock and the third safety lock can be sequentially unlocked only when the high-voltage switch cabinet is in a maintenance state, so that the grounding knife switch can be switched on only when the third safety lock locks the grounding knife switch, and the operation safety and reliability are greatly improved; the electrified misoperation of the grounding knife switch in a loop is avoided, and the normal operation of a power system and the safety of personnel are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment, and particularly relates to a high-voltage switch cabinet with a locking system. Background Art

[0002] In the operation of the power system, a high-voltage switch cabinet is a common electrical equipment. The grounding knife switch of the switch is a safety guarantee for the maintenance of the load equipment during power outage. When the load equipment needs to be maintained, closing the grounding knife switch can provide a reliable grounding circuit to prevent the accidental start of the electrical equipment or the discharge caused by static electricity accumulation, and ensure the personal safety of the maintenance personnel. However, since the grounding knife switch of the high-voltage switch cannot be mechanically locked, once the operation is improper, it may cause misoperation of the grounding knife switch and lead to serious safety accidents. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a high-voltage switch cabinet with a locking system to overcome the above deficiencies in the prior art.

[0004] The technical solution of the utility model to solve the above technical problem is as follows: A high-voltage switch cabinet with a locking system includes a high-voltage switch cabinet, a grounding knife switch, and a locking system; the locking system includes a safety lock I arranged at the high-voltage switch cabinet and a safety lock III arranged at the grounding knife switch; the grounding knife switch is locked by the safety lock III, and when the high-voltage switch of the high-voltage switch cabinet is not pushed out, the key of the safety lock I is locked; when the high-voltage switch of the high-voltage switch cabinet is pushed out, the key of the safety lock I is unlocked; the safety lock III is unlocked by the key of the safety lock I.

[0005] The beneficial effect of the utility model is: Through the double locking of the safety lock I and the safety lock III, before closing the grounding knife switch, it is necessary to first make the high-voltage switch cabinet in the maintenance state, and then the safety lock I and the safety lock III can be released in sequence, so as to release the locking of the safety lock III on the grounding knife switch. At this time, the grounding knife switch can be closed, which greatly improves the safety and reliability of the operation, avoids misoperation of the grounding knife switch when the circuit is energized, and ensures the normal operation of the power system and the safety of personnel.

[0006] On the basis of the above technical solution, the utility model can be further improved as follows.

[0007] Further, the safety lock I is arranged on the high-voltage switch of the high-voltage switch cabinet, and a positioning hole is arranged on the inner side wall of the high-voltage switch cabinet. The lock tongue of the safety lock I is detachably connected to the positioning hole.

[0008] Further, a retaining piece is connected to the lock tongue of the safety lock III, and the retaining piece is arranged below the grounding knife switch; when unlocking the safety lock III, the lock tongue of the safety lock III retracts, and the lock tongue of the safety lock III drives the retaining piece away from the grounding knife switch.

[0009] Further, the high-voltage switchgear is a dual-power high-voltage switchgear, including a first high-voltage switch and a second high-voltage switch. The locking system further includes a second safety lock disposed at the second high-voltage switch; the third safety lock is unlocked by the keys of the first safety lock and the second safety lock simultaneously.

[0010] Further, the first safety lock, the second safety lock, and the third safety lock are mechanically interlocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the locking system of the single-power high-voltage switchgear of the present invention;

[0012] Figure 2 is a schematic structural diagram of the locking system of the dual-power high-voltage switchgear of the present invention;

[0013] Figure 3 is a schematic structural diagram of the high-voltage switchgear of the present invention;

[0014] Figure 4 is a schematic structural diagram of the locking of the third safety lock and the grounding knife switch of the present invention.

[0015] In the drawings, the list of components represented by each reference numeral is as follows:

[0016] 1. High-voltage switchgear; 11. Positioning hole; 12. First high-voltage switch; 13. Second high-voltage switch; 2. Grounding knife switch; 3. Locking system; 31. First safety lock; 32. Second safety lock; 33. Third safety lock; 34. Flap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0018] As Figures 1 to 4 shown, in Embodiment 1, a high-voltage switchgear with a locking system includes a high-voltage switchgear 1, a grounding knife switch 2, and a locking system 3; the locking system 3 includes a first safety lock 31 disposed at the high-voltage switchgear 1 and a third safety lock 33 disposed at the grounding knife switch 2; the grounding knife switch 2 is locked by the third safety lock 33. When the high-voltage switch of the high-voltage switchgear 1 is not pushed out, the key of the first safety lock 31 is locked; when the high-voltage switch of the high-voltage switchgear 1 is pushed out, the key of the first safety lock 31 is unlocked; the third safety lock 33 is unlocked by the key of the first safety lock 31.

[0019] Through the double locking of safety lock 1 (31) and safety lock 3 (33), before closing the grounding switch (2), it is necessary to first put the high-voltage switchgear (1) in the maintenance state, that is, when the high-voltage switch is pushed out. The high-voltage switch is also called the switch trolley. Only then can safety lock 1 (31) and safety lock 3 (33) be released in sequence, thereby releasing the locking of safety lock 3 (33) on the grounding switch (2). Only at this time can the grounding switch (2) be closed. This greatly improves the safety and reliability of the operation, avoids misoperation of the grounding switch (2) with live electricity in the circuit, and ensures the normal operation of the power system and the safety of personnel.

[0020] Embodiment 2 is a further improvement based on Embodiment 1, and the specific content is as follows:

[0021] Safety lock 1 (31) is arranged on the high-voltage switch of the high-voltage switchgear (1). A positioning hole (11) is arranged on the inner side wall of the high-voltage switchgear (1). The locking tongue of safety lock 1 (31) is detachably connected in the positioning hole (11).

[0022] Safety lock 1 (31) is arranged at the inner top of the high-voltage switch of the high-voltage switchgear (1). The positioning hole (11) is arranged on the inner wall of the high-voltage switchgear (1) near the outside. When the high-voltage switchgear (1) is in the closed state, the locking tongue of safety lock 1 (31) cannot pop out under the action of the inner wall of the high-voltage switchgear (1). When the high-voltage switchgear (1) is in the maintenance state, at this time the high-voltage switch is pushed out, and the locking tongue of safety lock 1 (31) just extends into the positioning hole (11), thereby unlocking and the key can be pulled out.

[0023] Embodiment 3 is a further improvement based on Embodiment 1, and the specific content is as follows:

[0024] A retaining piece (34) is connected to the locking tongue of safety lock 3 (33). The retaining piece (34) is arranged below the grounding switch (2). When safety lock 3 (33) is unlocked, the locking tongue of safety lock 3 (33) retracts, and the locking tongue of safety lock 3 (33) drives the retaining piece (34) away from the grounding switch (2). When safety lock 3 (33) is not unlocked, since the locking tongue of safety lock 3 (33) is in the extended state, the retaining piece (34) is located directly below the grounding switch (2), and at this time the grounding switch (2) cannot be closed downward. When safety lock 3 (33) is unlocked, since the locking tongue of safety lock 3 (33) is in the retracted state, the retaining piece (34) is away from directly below the grounding switch (2), and at this time the grounding switch (2) can be closed downward.

[0025] Embodiment 4 is a further improvement based on any one of Embodiments 2 or 3, and the specific content is as follows:

[0026] The high-voltage switchgear cabinet 1 is a dual-power high-voltage switchgear cabinet 1, which includes a first high-voltage switch 12 and a second high-voltage switch 13. The interlocking system 3 also includes a second safety lock 32 provided at the second high-voltage switch 13; the third safety lock 33 is unlocked simultaneously by the keys of the first safety lock 31 and the second safety lock 32. This technical solution is applicable to both single-power high-voltage switchgear cabinets and dual-power high-voltage switchgear cabinets; by respectively providing the first safety lock 31 and the second safety lock 32 at the first high-voltage switch 12 and the second high-voltage switch 13, and the keys of the first safety lock 31 and the second safety lock 32 jointly unlocking the third safety lock 33, it can avoid accidentally touching and closing the grounding knife switch 2 when any high-voltage switchgear cabinet 1 is in the closing state, with higher safety.

[0027] Embodiment 5, this embodiment is a further improvement based on Embodiment 4, and the specific content is as follows:

[0028] The first safety lock 31, the second safety lock 32 and the third safety lock 33 are mechanical interlocks. In specific implementation, the first safety lock 31, the second safety lock 32 and the third safety lock 33 adopt the existing mechanical interlock of three locks and two keys.

[0029] Specific implementation steps:

[0030] When the high-voltage switchgear cabinet 1 is not in the open-circuit maintenance position (that is, when the high-voltage switch is pushed in), the lock tongues of the first safety lock 31 and the second safety lock 32 retract, the keys of the first safety lock 31 and the second safety lock 32 cannot be pulled out, and are respectively located inside the first high-voltage switch 12 and the second high-voltage switch 13; at this time, the third safety lock 33 is in the locked state, the lock tongue of the third safety lock 33 protrudes, and the retaining plate 34 is located below the grounding knife switch 2, and the grounding knife switch 2 cannot be closed;

[0031] When the high-voltage switchgear cabinet 1 is in the open-circuit maintenance position (that is, when the high-voltage switch is pushed out), the lock tongues of the first safety lock 31 and the second safety lock 32 extend into the positioning holes 11, and the keys of the first safety lock 31 and the second safety lock 32 can be pulled out; inserting the keys of the first safety lock 31 and the second safety lock 32 into the third safety lock 33 at the same time can unlock it, the lock tongue of the third safety lock 33 retracts, and drives the retaining plate 34 away from below the grounding knife switch 2, and at this time, the grounding knife switch 2 can be closed;

[0032] When it is necessary to close the first high-voltage switch 12 and the second high-voltage switch 13, insert the keys of the first safety lock 31 and the second safety lock 32 back into the first safety lock 31 and the second safety lock 32 respectively, and turn the keys to make the lock tongues of the first safety lock 31 and the second safety lock 32 disengage from the positioning holes 11, then the first high-voltage switch 12 and the second high-voltage switch 13 can be closed.

[0033] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A high-voltage switchgear with a locking system, characterized in that, It includes a high-voltage switchgear (1), an earthing switch (2) and a locking system (3); the locking system (3) includes a first safety lock (31) arranged at the high-voltage switchgear (1) and a third safety lock (33) at the earthing switch (2); the earthing switch (2) is locked by the third safety lock (33), and when the high-voltage switch of the high-voltage switchgear (1) is not pushed out, the key of the first safety lock (31) is locked; when the high-voltage switch of the high-voltage switchgear (1) is pushed out, the key of the first safety lock (31) is unlocked; the third safety lock (33) is unlocked by the key of the first safety lock (31).

2. The high-voltage switchgear with a latching system according to claim 1, characterized in that The first safety lock (31) is arranged on the high-voltage switch of the high-voltage switchgear (1), and a positioning hole (11) is arranged on the inner side wall of the high-voltage switchgear (1), and the locking tongue of the first safety lock (31) is detachably connected in the positioning hole (11).

3. The high-voltage switchgear with a latching system according to claim 1, characterized in that, A retaining piece (34) is connected to the locking tongue of the third safety lock (33), and the retaining piece (34) is arranged below the earthing switch (2); when the third safety lock (33) is unlocked, the locking tongue of the third safety lock (33) retracts, and the locking tongue of the third safety lock (33) drives the retaining piece (34) away from the earthing switch (2).

4. A high-voltage switchgear with a locking system according to any one of claims 2 or 3, characterized in that, The high-voltage switchgear (1) is a dual-power high-voltage switchgear, which includes a first high-voltage switch (12) and a second high-voltage switch (13), and the locking system (3) further includes a second safety lock (32) arranged at the second high-voltage switch (13); the third safety lock (33) is unlocked by the keys of the first safety lock (31) and the second safety lock (32) simultaneously.

5. A high-voltage switchgear with a locking system according to claim 4, characterized in that, The first safety lock (31), the second safety lock (32) and the third safety lock (33) are mechanical interlocks.

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