CN218997414U

CN218997414U - High-voltage cabinet capable of preventing ground switch from being mistakenly closed

Info

Publication number: CN218997414U
Application number: CN202222437836.0U
Authority: CN
Inventors: 陈争; 蒯圣礼; 王辉
Original assignee: Liyuan Power Equipment Joint Stocks Co ltd
Current assignee: Liyuan Power Equipment Joint Stocks Co ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2023-05-09
Anticipated expiration: 2032-09-14

Abstract

The utility model discloses a high-voltage cabinet capable of preventing a grounding switch from being mistakenly closed, which comprises a cabinet body, a wire inlet side, a grounding switch, an electromagnet seat, an electromagnet assembly, an operating rod, a reset spring and a linkage mechanism, wherein when the wire inlet side is electrified, electromagnetic ferromagnetism is endowed, an armature is attracted to carry a limiting block to overcome the resistance of deformation of the reset spring and slide into a caulking groove, and the caulking groove locks the limiting block in the rotating direction together with the operating rod; when the incoming line side is powered down, the electromagnet is demagnetized, and the reset spring pulls the limiting block to be separated from the caulking groove, so that the operating rod can rotate. The utility model can effectively avoid misoperation of the grounding switch when an operator is electrified at the incoming line side, and can effectively avoid risks.

Description

High-voltage cabinet capable of preventing ground switch from being mistakenly closed

Technical Field

The utility model relates to the technical field of power equipment, in particular to a high-voltage cabinet capable of preventing a grounding switch from being turned on by mistake.

Background

With the development of the power grid and the improvement of equipment technology, the high-voltage cabinet is widely used in the power grid, plays roles in power transmission and distribution, control and protection, the grounding switch in the high-voltage cabinet is used as a grounding protection device when a power failure line is not powered, and the switching-on grounding switch is strictly forbidden when the equipment normal operation line is electrified, so that the grounding switch is very important to operate correctly.

The prior high-voltage cabinet grounding switch is communicated with the power supply incoming line side, when an operator performs daily operation maintenance and equipment overhaul of the high-voltage cabinet, although a breaker is disconnected, whether the power supply incoming line side is still electrified is unknown, if the grounding switch is mistakenly closed at this time, three-phase short circuit can be caused, damage to equipment can be caused, threat to life safety of the operator is formed, and the problem needs to be solved urgently.

Disclosure of Invention

In order to solve the technical problems in the background technology, the utility model provides a high-voltage cabinet capable of preventing a grounding switch from being turned on by mistake.

The utility model provides a high-voltage cabinet capable of preventing a grounding switch from being mistakenly closed, which comprises a cabinet body, a wire inlet side, a grounding switch, an electromagnet seat, an electromagnet assembly, an operating rod, a reset spring and a linkage mechanism, wherein the electromagnet seat and the grounding switch are fixedly arranged in the cabinet body; when the incoming line side is powered down, the electromagnet is demagnetized, and the reset spring pulls the limiting block to be separated from the caulking groove, so that the operating rod can rotate.

Preferably, the method further comprises: and the transformer is electrically connected between the wire inlet side and the electromagnet assembly so as to convert the high voltage at the wire inlet side into a relatively low voltage for the electromagnet assembly.

Preferably, one end of the operating rod penetrating through the cabinet body is fixedly provided with a handle.

Preferably, the operation lever specifically includes: the body part and encircle the protruding portion of body part arrangement, reset spring fixes between stopper and protruding portion, and reset spring and body part parallel arrangement.

Preferably, at least two sets of return springs are included and are circumferentially evenly spaced around the body portion.

Preferably, the main body part comprises a rotating part and a sliding part, and the limiting block is sleeved on the sliding part and forms locking for relative rotation between the sliding part and the limiting block.

Preferably, the grounding switch includes: the pivot and fix in pivot epaxial knife switch, the pivot rotates and can drives the knife switch, and interlock mechanism includes: the first connecting rod, the second connecting rod and the third connecting rod are hinged in sequence, one end of the first connecting rod, which is far away from the second connecting rod, is vertically fixed on the main body part, one end of the third connecting rod, which is far away from the second connecting rod, is vertically fixed on the rotating shaft, and the rotating direction of the first connecting rod relative to the second connecting rod is vertical to the rotating direction of the second connecting rod relative to the third connecting rod.

According to the utility model, the caulking groove is formed in the electromagnet seat, the electromagnet is accommodated in the caulking groove, the electromagnet is connected with the incoming line side in a ferroelectric manner and is powered by the incoming line side, the armature is arranged on the limiting block, and the reset spring is arranged between the limiting block and the operating rod; when an operator can operate the grounding switch through the operating rod, the operator can judge that the line at the incoming line side is powered down, the operator can rotate the operating rod outside the cabinet body to operate the grounding switch to open and close, and then follow-up maintenance work is safely carried out. The utility model can effectively avoid misoperation of the grounding switch when an operator is electrified at the incoming line side, and can effectively avoid risks.

Drawings

Fig. 1 is a schematic structural diagram of a high-voltage cabinet in a non-electric state at an inlet side, which can prevent a grounding switch from being turned on by mistake.

Fig. 2 is a schematic structural diagram of a live state of an incoming line side of a high-voltage cabinet capable of preventing a grounding switch from being turned on by mistake.

Detailed Description

Referring to fig. 1-2, the high-voltage cabinet capable of preventing the grounding switch from being mistakenly combined comprises a cabinet body 1, a wire inlet side 2, a grounding switch 3, an electromagnet seat 4, an electromagnet assembly, an operating rod 5, a reset spring 6 and a linkage mechanism 7, wherein the electromagnet seat 4 and the grounding switch 3 are fixedly arranged in the cabinet body 1, an embedded groove 41 is formed in the electromagnet seat 4, an electromagnet 8 of the electromagnet assembly is arranged in the embedded groove 41, the electromagnet 8 is electrically connected with the wire inlet side 2 and is powered by the wire inlet side 2, the grounding switch 3 is connected with the wire inlet side 2 in series, the operating rod 5 rotates to be connected with the cabinet body 1, one end of the operating rod 5 penetrates through the cabinet body 1 and extends out of the cabinet body 1, the operating rod 5 is connected with the grounding switch 3 through the linkage mechanism 7, so that the operating rod 5 can be operated to be opened and closed by rotating the operating rod 5 outside the cabinet body 1, a limiting block 9 capable of axially sliding relative to the operating rod 5 is sleeved at the other end of the operating rod 5, an armature 91 is arranged on the limiting block 9, a reset spring 6 is arranged between the limiting block 9 and the operating rod 5, the embedded groove 41 is electrically connected with the operating rod 5, the electromagnet 9 is electrically connected with the wire inlet side 2 in series, and the armature 9 is enabled to be attracted to axially slide to the limiting block 9 to be deformed to be opposite to the electromagnet 9 when the electromagnet 9 is axially arranged at the side to be in the side 9, and the wire inlet side 9 is enabled to be deformed to be opposite to be deformed to be opposite to the wire 9; when the incoming line side 2 is powered off, the electromagnet 8 is demagnetized, and the reset spring 6 pulls the limiting block 9 to be separated from the caulking groove 41, so that the operating rod 5 can rotate.

As can be seen from the above, according to the utility model, the caulking groove 41 is formed on the electromagnet seat 4, the electromagnet 8 is accommodated in the caulking groove 41, the electromagnet 8 is electrically connected with the wire inlet side 2 and is powered by the wire inlet side 2, the armature 91 is mounted on the limiting block 9, the reset spring 6 is mounted between the limiting block 9 and the operating rod 5, when an operator performs daily operation maintenance and equipment overhaul of the high-voltage cabinet, after the circuit breaker is disconnected, if the circuit of the wire inlet side 2 is still electrified, the electromagnet 8 continuously keeps to have the magnetic attraction armature 91 to embed the limiting block 9 in the caulking groove 41, and the caulking groove 41 locks the limiting block 9 with the operating rod 5 in the rotating direction, so that when the operator cannot operate the grounding switch 3 through the operating rod 5, the circuit of the wire inlet side 2 can be judged to be still electrified; when an operator can operate the grounding switch 3 through the operating rod 5, the operator can judge that the line on the incoming line side 2 is powered down, the grounding switch can be operated to be opened and closed by rotating the operating rod outside the cabinet body, and then follow-up maintenance work is safely carried out. The utility model can effectively avoid misoperation of the grounding switch 3 when the operator is electrified on the incoming line side 2, and can effectively avoid risks.

In a specific embodiment, the method further comprises: the transformer is electrically connected between the wire inlet side 2 and the electromagnet assembly, so that the high voltage of the wire inlet side 2 is converted into the relatively low voltage for the electromagnet assembly, and the use safety and stability of the electromagnet assembly can be effectively improved.

In this embodiment, the handle 53 is fixedly disposed at one end of the operating rod 5 penetrating through the cabinet body 1, so that the operator can conveniently rotate the operating rod 5.

In this embodiment, the operation lever 5 specifically includes: a main body portion 51 and a protruding portion 52 arranged around the main body portion 51, the return spring 6 is fixed between the stopper 9 and the protruding portion 52, and the return spring 6 is arranged in parallel with the main body portion 51; the stability of the installation of the return spring 6 can be effectively improved, and the force guarantee is provided for the axial sliding of the limiting block 9 relative to the operating rod 5.

In a further specific embodiment, at least two groups of return springs 6 are included and are uniformly arranged at intervals around the circumference of the main body 51, so that the balance and stability of the force when the limiting block 9 axially slides relative to the operating rod 5 can be effectively improved.

In a further specific embodiment, the main body 51 includes a rotating portion 511 and a sliding portion 512, the limiting block 9 is sleeved on the sliding portion 512 and locks the relative rotation between the sliding portion 512 and the limiting block 9, when the incoming line side 2 is electrified or powered off, the limiting block 9 can be effectively improved to slide into or slide out of the caulking groove 41 accurately relative to the sliding portion 512, so that the function of preventing misoperation of the grounding switch 3 is achieved.

In a further specific embodiment, the grounding switch 3 comprises: the pivot and fix in pivot epaxial knife switch, the pivot rotates and can drive the knife switch, and interlock mechanism 7 includes: the first connecting rod 71, the second connecting rod 72 and the third connecting rod 73 are hinged in sequence, one end of the first connecting rod 71, which is far away from the second connecting rod 72, is vertically fixed on the main body part 51, one end of the third connecting rod 73, which is far away from the second connecting rod 72, is vertically fixed on the rotating shaft, and the rotating direction of the first connecting rod 71 relative to the second connecting rod 72 is vertical to the rotating direction of the second connecting rod 72 relative to the third connecting rod 73; the operating rod 5 is converted into up-and-down motion for driving the rotating shaft of the grounding switch 3 to execute the knife switch opening and closing operation by driving the first connecting rod 71, the second connecting rod 72 and the third connecting rod 73 to rotate, so that the local stress concentration is avoided, the stress is uniform, the stability of the operating process is fully ensured, and the service life of the misoperation-preventing grounding switch 3 is prolonged.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a high-voltage board capable of preventing the misoperation of a grounding switch, which comprises a cabinet body (1), an inlet wire side (2), a grounding switch (3), an electromagnet seat (4), an electromagnet assembly, an operating rod (5), a reset spring (6) and a linkage mechanism (7), and is characterized in that the electromagnet seat (4) and the grounding switch (3) are fixedly arranged in the cabinet body (1), a caulking groove (41) is arranged on the electromagnet seat (4), an electromagnet (8) of the electromagnet assembly is stored and arranged in the caulking groove (41), the electromagnet (8) is electrically connected with the inlet wire side (2) and is powered by the inlet wire side (2), the grounding switch (3) is connected with the inlet wire side (2) in series, the operating rod (5) is rotationally connected with the cabinet body (1), one end penetrates through the cabinet body (1) and extends out of the cabinet body (1), the operating rod (5) is connected with the grounding switch (3) through the linkage mechanism (7) so that the operating rod (5) can be operated to open and close, the other operating rod (5) in the cabinet body (1) can be rotated out, the operating rod (5) is provided with a limiting block (9) and the other end (5) is provided with a limiting block (9) which can be axially arranged on the sliding end (9), the caulking groove (41) is positioned at the side of the limiting block (9) on the axial extension line of the operating rod (5), so that when the wire inlet side (2) is electrified, magnetism is endowed to the electromagnet (8) and the armature (91) is attracted to slide into the caulking groove (41) with the limiting block (9) against the resistance of deformation of the return spring (6), and the caulking groove (41) forms locking on the limiting block (9) along with the operating rod (5) in the rotating direction; when the incoming line side (2) is powered off, the electromagnet (8) is demagnetized, and the reset spring (6) breaks away from the traction limiting block (9) from the caulking groove (41) so that the operating rod (5) can rotate.

2. The high-voltage board capable of preventing the false closing of the grounding switch according to claim 1, further comprising: and the transformer is electrically connected between the wire inlet side (2) and the electromagnet assembly so as to convert the high voltage of the wire inlet side (2) into a relatively low voltage for the electromagnet assembly.

3. The high-voltage cabinet capable of preventing the false closing of the grounding switch according to claim 1, wherein a handle (53) is fixedly arranged at one end of the operating rod (5) penetrating through the outside of the cabinet body (1).

4. The high-voltage cabinet capable of preventing the false closing of the grounding switch according to claim 1, wherein the operating lever (5) specifically comprises: the device comprises a main body part (51) and a protruding part (52) arranged around the main body part (51), wherein the return spring (6) is fixed between the limiting block (9) and the protruding part (52), and the return spring (6) is arranged in parallel with the main body part (51).

5. The high-voltage cabinet capable of preventing false closing of a grounding switch according to claim 4, comprising at least two groups of return springs (6) and being circumferentially and uniformly arranged at intervals around the main body (51).

6. The high-voltage cabinet capable of preventing the false closing of the grounding switch according to claim 4, wherein the main body part (51) comprises a rotating part (511) and a sliding part (512), and the limiting block (9) is sleeved on the sliding part (512) and forms a locking for the relative rotation between the sliding part (512) and the limiting block (9).

7. The high-voltage cabinet capable of preventing erroneous closing of a grounding switch according to claim 4, wherein the grounding switch (3) comprises: the pivot and fix in pivot epaxial knife switch, the pivot rotates and can drive the knife switch, and interlock mechanism (7) include: the device comprises a first connecting rod (71), a second connecting rod (72) and a third connecting rod (73) which are hinged in sequence, wherein one end of the first connecting rod (71) far away from the second connecting rod (72) is vertically fixed on a main body part (51), one end of the third connecting rod (73) far away from the second connecting rod (72) is vertically fixed on a rotating shaft, and the rotating direction of the first connecting rod (71) relative to the second connecting rod (72) is perpendicular to the rotating direction of the second connecting rod (72) relative to the third connecting rod (73).