Grounding interlocking device for ring main unit

Abstract

The invention discloses a grounding interlocking device for a ring main unit, and the device comprises a supporting plate which is disposed on a three-station operation mechanism of the ring main unit; a program lock is arranged at the front end of the supporting plate, and a program lock baffle is arranged on the supporting plate through a program lock connecting rod. The program lock baffle moves along with a lock cylinder of the program lock. When the program lock key is rotated clockwise, the lock cylinder can move in the direction away from the program lock shell. When the lock cylinder rotates anticlockwise, the lock cylinder can move towards the program lock shell; a limiting key is arranged in a lock hole corresponding to the program lock key, and the program lock key can be pulled out only when the program lock key clockwise rotates to a limit position; the grounding operation shaft of the three-position operation mechanism of the ring main unit is provided with an elastic pin capable of rotating. According to the grounding interlocking device, through a dual interlocking mechanism of the program lock and the latching electromagnet, the wrong grounding operation of the ring main unit in an electrified state and the risk of opening a transformer net door in an ungrounded state are effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of power equipment safety, and in particular to a grounding interlocking device for a ring network cabinet. Background Art

[0002] As an important power distribution equipment in the power system, the operating safety of the ring main unit is directly related to the stable operation of the power system and the personal safety of the operators. The grounding operation of the traditional ring main unit often lacks an effective interlocking mechanism, which is easy to cause misoperation, such as opening the transformer network door when it is grounded or not grounded, which brings safety hazards to the power system. Therefore, it is particularly important to develop a grounding interlocking device that can effectively prevent misoperation. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the purpose of the present invention is to provide a grounding interlocking device for a ring main unit. Through the mechanical and electrical dual interlocking mechanism, the safety of the ring main unit during the grounding operation is ensured, and the "five protections" of preventing the live grounding switch from being closed and preventing the accidental entry into the live compartment are realized.

[0004] A grounding interlocking device for a ring main unit, comprising:

[0005] A support plate, wherein the support plate is arranged on the three-position operating mechanism of the ring main unit;

[0006] A program lock is arranged at the front end of the support plate, and a program lock baffle is arranged on the support plate through a program lock connecting rod;

[0007] The program lock baffle moves together with the lock core of the program lock;

[0008] When the program lock key is rotated clockwise, the lock core will move away from the program lock housing; when it is rotated counterclockwise, the lock core will move toward the program lock housing;

[0009] A limit key is set in the lock hole corresponding to the program lock key. The program lock key can only be pulled out when it is rotated clockwise to the limit position, and the program lock key is consistent with the key of the transformer network door;

[0010] The grounding operation shaft of the three-position operating mechanism of the ring main unit is provided with an elastic pin capable of rotating in a certain direction;

[0011] When the ring main unit is in the grounding opening position, the elastic pin on the grounding operation shaft of the three-position operating mechanism is in a horizontal state, and when the ring main unit is in the grounding closing position, the elastic pin turns to a vertical state;

[0012] The locking electromagnet is arranged on the three-position operating mechanism of the ring main unit through the locking electromagnet mounting plate;

[0013] The locking electromagnet core of the locking electromagnet is arranged toward the grounding operation axis direction of the three-position operating mechanism of the ring main unit, and the reset spring of the locking electromagnet is arranged at the shell end away from the locking electromagnet core of the locking electromagnet.

[0014] In a preferred embodiment of the present invention, the program lock is installed at the front end of the support plate via a program lock installation plate.

[0015] In a preferred embodiment of the present invention, when the ring main unit is in the grounding opening position, the elastic pin on the grounding operating shaft of the three-position operating mechanism is in a horizontal state;

[0016] At this time, rotate the program lock key clockwise, and the lock core and the program lock baffle move to the right until they are blocked by the elastic pin on the grounding operating shaft of the three-position operating mechanism, so that the program lock key cannot be pulled out;

[0017] When the ring main unit is in the grounding closing position, the elastic pin turns to a vertical state. At this time, rotate the program lock key clockwise, and the lock core and the program lock baffle can move freely to the extreme position of clockwise rotation. The program lock key can be pulled out and the transformer network door can be opened.

[0018] In a preferred embodiment of the present invention, the coil of the locking electromagnet is energized to cause the iron core of the locking electromagnet to move in a direction away from the housing, and the iron core of the locking electromagnet is reset by a reset spring of the locking electromagnet after the coil of the locking electromagnet is de-energized;

[0019] When the incoming cable in the cable room of the incoming cabinet of the ring main unit is energized, the coil of the locking electromagnet is energized, and the iron core of the locking electromagnet moves toward and fits the grounding operation shaft of the three-position mechanism, preventing the operating handle from being inserted into the grounding operation shaft of the three-position mechanism to avoid erroneous grounding operation;

[0020] When the incoming cable in the cable room of the ring main unit is not energized, the coil of the locking electromagnet loses power, the lock core of the locking electromagnet is reset, and the operating handle can be inserted into the grounding operating shaft of the three-position mechanism for grounding operation.

[0021] The beneficial effects of the present invention are:

[0022] The grounding interlock device of the present invention effectively prevents the risk of mistaken grounding operation of the ring main unit in a live state and opening the transformer network door in an ungrounded state through the dual interlocking mechanism of the program lock and the locking electromagnet, thereby improving the safety and stability of the power system, meeting the "five protection" requirements of the power system, and having important practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The structure of the present invention is schematically shown Figure 1 .

[0024] Figure 2 The structure of the present invention is schematically shown Figure 2 . DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following structure, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] like Figure 1 A grounding interlocking device for a ring main unit as shown in or 2 comprises a support plate 1, which is arranged on a three-position operating mechanism 2 of the ring main unit.

[0028] A program lock 6 is arranged at the front end of the support plate 1 , and a program lock baffle 5 is arranged on the support plate 1 through a program lock connecting rod 7 , and the program lock baffle 5 moves together with the lock core 62 of the program lock.

[0029] The program lock 6 is installed at the front end of the support plate 1 through the program lock installation plate 8 .

[0030] When the program lock key 61 is rotated clockwise, the lock core 62 will move in a direction away from the program lock housing 63 ; when it is rotated counterclockwise, the lock core 62 will move in a direction toward the program lock housing 63 .

[0031] A limit key is arranged in the lock hole corresponding to the program lock key 61. The program lock key 61 can be pulled out only when it is rotated clockwise to the limit position, and the program lock key 61 is consistent with the key of the transformer network door.

[0032] A rotatable elastic pin 22 is provided on the grounding operating shaft 21 of the three-position operating mechanism of the ring main unit. When the ring main unit is in the grounding opening position, the elastic pin 22 on the grounding operating shaft 21 of the three-position operating mechanism is in a horizontal state. When the ring main unit is in the grounding closing position, the elastic pin 22 turns to a vertical state.

[0033] Specifically, when the ring main unit is in the grounding opening position, the elastic pin 22 on the grounding operating shaft 21 of the three-position operating mechanism is in a horizontal state. At this time, the program lock key 61 is rotated clockwise, and the lock core 62 and the program lock baffle 5 move to the right until they are blocked by the elastic pin 21 on the grounding operating shaft 2 of the three-position operating mechanism, so that the program lock key 61 does not reach the limit position and cannot be pulled out.

[0034] When the ring main unit is in the grounding closing position, the elastic pin 2 turns to a vertical state. At this time, the program lock key 61 is rotated clockwise, and the lock core 62 and the program lock baffle 5 can move freely to the extreme position of clockwise rotation. The program lock key 61 can be pulled out to open the transformer network door.

[0035] The locking electromagnet 4 is arranged on the three-position operating mechanism 2 of the ring main unit through the locking electromagnet mounting plate 3. The locking electromagnet core 41 of the locking electromagnet 4 is arranged toward the grounding operating axis 21 of the three-position operating mechanism of the ring main unit. The reset spring 43 of the locking electromagnet 4 is arranged at the end of the shell 42 of the locking electromagnet core 41 away from the locking electromagnet.

[0036] When the coil of the locking electromagnet 4 is energized, the iron core 41 of the locking electromagnet can move in a direction away from the housing 42. When the coil of the locking electromagnet 4 is deenergized, the iron core 41 of the locking electromagnet is reset by the reset spring 43 of the locking electromagnet.

[0037] When the incoming cable in the cable room of the incoming cabinet of the ring main unit is energized, the coil of the locking electromagnet 4 is energized, and the iron core 41 of the locking electromagnet moves toward and fits the three-position mechanism grounding operation shaft 21, preventing the operating handle from being inserted into the three-position mechanism grounding operation shaft 21, thereby avoiding misoperation of grounding;

[0038] When the incoming cable in the cable room of the ring main unit incoming cabinet is not energized, the coil of the locking electromagnet 4 loses power, the lock core 41 of the locking electromagnet is reset, and the operating handle can be inserted into the three-position mechanism grounding operating shaft 21 for grounding operation.

[0039] The basic principles and main features of the invention and the advantages of the invention are shown and described above.

[0040] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A grounding interlocking device for a ring main unit, characterized in that: include: A support plate, wherein the support plate is arranged on the three-position operating mechanism of the ring main unit; A program lock is arranged at the front end of the support plate, and a program lock baffle is arranged on the support plate through a program lock connecting rod; The program lock baffle moves together with the lock core of the program lock; When the program lock key is rotated clockwise, the lock core will move away from the program lock housing; when it is rotated counterclockwise, the lock core will move toward the program lock housing; A limit key is set in the lock hole corresponding to the program lock key. The program lock key can only be pulled out when it is rotated clockwise to the limit position, and the program lock key is consistent with the key of the transformer network door; The grounding operation shaft of the three-position operating mechanism of the ring main unit is provided with an elastic pin capable of rotating in a certain direction; When the ring main unit is in the grounding opening position, the elastic pin on the grounding operation shaft of the three-position operating mechanism is in a horizontal state, and when the ring main unit is in the grounding closing position, the elastic pin turns to a vertical state; The locking electromagnet is arranged on the three-position operating mechanism of the ring main unit through the locking electromagnet mounting plate; The locking electromagnet core of the locking electromagnet is arranged toward the grounding operation axis direction of the three-position operating mechanism of the ring main unit, and the reset spring of the locking electromagnet is arranged at the shell end away from the locking electromagnet core of the locking electromagnet.

2. A grounding interlocking device for a ring main unit as claimed in claim 1, characterized in that: The program lock is installed at the front end of the support plate through a program lock installation plate.

3. A grounding interlocking device for a ring main unit as claimed in claim 1, characterized in that: When the ring main unit is in the grounding opening position, the elastic pin on the grounding operating shaft of the three-position operating mechanism is in a horizontal state; At this time, rotate the program lock key clockwise, and the lock core and the program lock baffle move to the right until they are blocked by the elastic pin on the grounding operating shaft of the three-position operating mechanism, so that the program lock key cannot be pulled out; When the ring main unit is in the grounding closing position, the elastic pin turns to a vertical state. At this time, rotate the program lock key clockwise, and the lock core and the program lock baffle can move freely to the extreme position of clockwise rotation. The program lock key can be pulled out and the transformer network door can be opened.

4. A grounding interlocking device for a ring main unit as claimed in claim 1, characterized in that: When the coil of the locking electromagnet is energized, the iron core of the locking electromagnet moves in a direction away from the housing. When the coil of the locking electromagnet is deenergized, the iron core of the locking electromagnet is reset by the reset spring of the locking electromagnet. When the incoming cable in the cable room of the incoming cabinet of the ring main unit is energized, the coil of the locking electromagnet is energized, and the iron core of the locking electromagnet moves toward and fits the grounding operation shaft of the three-position mechanism, preventing the operating handle from being inserted into the grounding operation shaft of the three-position mechanism to avoid erroneous grounding operation; When the incoming cable in the cable room of the ring main unit is not energized, the coil of the locking electromagnet loses power, the lock core of the locking electromagnet is reset, and the operating handle can be inserted into the grounding operating shaft of the three-position mechanism for grounding operation.

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