A grounding switch locking device

Abstract

This invention discloses a grounding switch locking device, comprising a base, a locking lever, a return spring, and a locking electromagnet. The locking lever is rotatably connected to a mounting plate of the base and can rotate between a locked position and an unlocked position. The locking lever has a locking part that controls whether the operating shaft is locked or unlocked. The return spring cooperates with the locking lever and the mounting plate to drive the locking lever to the locked position. The locking electromagnet is mounted on the base, and its telescopic rod moves through a limiting hole and engages with the locking lever in a limiting engagement. When the telescopic rod of the locking electromagnet engages with the locking lever, the locking lever is limited to the locked position, so that the locking part of the locking lever remains engaged with the operating shaft of the grounding switch, thereby locking the operating shaft of the operating switch and preventing operation. This invention has the advantages of small size, low cost, and stable and reliable operation.

Description

Technical Field

[0001] The invention relates to the field of switch equipment, in particular to a grounding switch locking device. Background Art

[0002] In the existing switchgear, the grounding switch is locked and controlled by an electromagnetic lock. However, the existing electromagnetic locks used for the grounding switch are large in size and high in cost. In addition, the locking rod of the electromagnetic lock is easily bent and deformed after long-term use, which causes the electromagnetic lock to become stuck. As a result, the electromagnetic lock cannot lock the grounding switch normally. Therefore, the existing electromagnetic locks are not stable and reliable in use. Summary of the invention

[0003] The object of the present invention is to provide a grounding switch locking device, which has the advantages of stable and reliable use.

[0004] In order to achieve the above object, the solution of the present invention is:

[0005] A locking device for a grounding switch comprises a base, a locking plate, a return spring and a locking electromagnet; the base is provided with a mounting plate, the mounting plate is provided with a limit hole and an operating hole for the operating shaft of the grounding switch to pass through; the locking plate is rotatably connected with the mounting plate, and the locking plate can be rotated between a locking position and an unlocking position, the locking plate is provided with a locking portion, and the locking portion is used to cooperate with the operating shaft of the grounding switch to control whether the operating shaft is locked or not; the return spring cooperates with the locking plate and the mounting plate, and the return spring is used to drive the locking plate to rotate to the locking position; the locking electromagnet is installed on the base, the locking electromagnet has a telescopic rod that can be telescopically moved, the telescopic rod movably passes through the limit hole, and the telescopic rod is movably limited to cooperate with the locking plate; when the telescopic rod of the locking electromagnet forms a limit fit with the locking plate, the locking plate is limited to the locking position, so that the locking portion of the locking plate and the operating shaft of the grounding switch remain in a matching state, thereby making the operating shaft of the operating switch locked and unable to be operated.

[0006] The locking plate is also provided with a stopper, and the stopper and the locking part of the locking plate are respectively located on both sides of the locking plate; the telescopic rod of the locking electromagnet is movably abutted against the stopper of the locking plate.

[0007] The mounting plate is provided with a spring connecting portion, and the two ends of the return spring are respectively connected to the spring connecting portion of the mounting plate and the stopper of the locking plate.

[0008] The locking plate is arranged in parallel with the mounting plate, and the locking plate and the locking electromagnet are respectively located on two sides of the mounting plate.

[0009] The locking plate is provided with an arc-shaped hole, the center of which is located on the central axis of rotation of the locking plate; the mounting plate cooperates with a limiting column, which is movably inserted into the arc-shaped hole; when the limiting column abuts against one side of the arc-shaped hole, the locking plate is in a locked position; and when the limiting column abuts against the other side of the arc-shaped hole, the locking plate is in an unlocked position.

[0010] The locking portion of the locking plate is provided with an inclined pushing surface.

[0011] The base includes a pedestal and the mounting plate; the mounting plate is detachably connected to the base, and the locking electromagnet is mounted on the pedestal.

[0012] The mounting plate and the base are detachably connected via screws.

[0013] The locking electromagnet is detachably connected to the base.

[0014] The base is detachably connected to an electromagnet bracket, and the locking electromagnet is installed on the electromagnet bracket.

[0015] After adopting the above scheme, the working principle of the present invention is specifically as follows:

[0016] When the telescopic rod of the locking electromagnet is in the extended state, the locking plate is in the locked position under the action of the return spring. Therefore, the telescopic rod of the locking electromagnet forms a limiting match with the locking plate to limit the locking plate to the locked position, thereby driving the locking portion of the locking plate to maintain a matching state with the operating shaft of the grounding switch, so that the operating shaft of the operating switch is locked and cannot be operated. At this time, the grounding switch locking device of the present invention is in the locked state;

[0017] When the telescopic rod of the locking electromagnet of the present invention is in a retracted state, the grounding switch locking device of the present invention is in an unlocked state. At this time, the telescopic rod of the locking electromagnet does not form a limiting cooperation with the locking paddle, so that the locking paddle can be rotated from the locked position to the unlocked position. In this way, the operator can rotate the locking paddle from the locked position to the unlocked position to unlock the operating shaft of the operating switch, so that the operator can operate the operating shaft of the grounding switch through the operating handle of the grounding switch.

[0018] In the present invention, since the telescopic rod of the locking electromagnet passes through the limiting hole of the mounting plate, the limiting hole will limit and protect the telescopic rod of the locking electromagnet, preventing the telescopic rod of the locking electromagnet from being deformed by external force, so that the telescopic rod of the locking electromagnet can be stably and reliably extended, thereby making the grounding switch locking device of the present invention stable and reliable to use. In addition, the grounding switch locking device of the present invention has fewer parts, and the locking electromagnet is smaller in size and cost than the existing electromagnetic lock, which makes the grounding switch locking device of the present invention lower in cost and smaller in size. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure of the present invention is schematically shown Figure 1 (The present invention is in a locked state);

[0020] Figure 2 The structure of the present invention is schematically shown Figure 2 (The present invention is in unlocked state);

[0021] Figure 3 The structure of the present invention is schematically shown Figure 3 (The present invention is in a locked state);

[0022] Figure 4 The structure of the present invention is schematically shown Figure 4 (The present invention is in a locked state);

[0023] Figure 5 It is a structural exploded view of the base of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the locking plate of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the operating shaft of the grounding switch of the present invention;

[0026] Description of labels:

[0027] Base 1, mounting plate 11, limiting hole 111, operating hole 112, spring connection part 113, limiting column 114, base 12, electromagnet bracket 13

[0028] Locking plate 2, locking portion 21, pushing surface 211,

[0029] Return spring 3,

[0030] Locking electromagnet 4, telescopic rod 41,

[0031] Earthing switch A, operating shaft A1, neck A11, polygonal cylinder A12. DETAILED DESCRIPTION

[0032] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0033] like Figures 1 to 7As shown, the present invention discloses a grounding switch locking device, which includes a base 1, a locking plate 2, a reset spring 3 and a locking electromagnet 4; the base 1 is provided with a mounting plate 11, the mounting plate 11 is provided with a limit hole 111 and an operating hole 112 for the operating shaft A1 of the grounding switch A to pass through; the locking plate 2 is rotatably connected to the mounting plate 11, and the locking plate 2 can be rotated between a locking position and an unlocking position, and the locking plate 2 is provided with a locking portion 21, and the locking portion 21 is used to cooperate with the operating shaft A1 of the grounding switch A to control whether the operating shaft A1 is locked or not; the reset spring 3 is connected to the locking plate 2 and The mounting plate 11 cooperates with each other, and the reset spring 3 is used to drive the locking plate 2 to rotate to the locking position; the locking electromagnet 4 is installed on the base 1, and the locking electromagnet 4 has a telescopic rod 41 that can be telescopically moved, and the telescopic rod 41 movably passes through the limiting hole 111, and the telescopic rod 41 is movably limited and matched with the locking plate 2; when the telescopic rod 31 of the locking electromagnet 4 forms a limited match with the locking plate 2, the locking plate 2 is limited to the locking position, so that the locking portion 21 of the locking plate 2 maintains a matching state with the operating shaft A1 of the grounding switch A, thereby making the operating shaft A1 of the operating switch A locked and unable to be operated.

[0034] When the present invention is in use, the operating shaft A1 of the grounding switch A passes through the operating hole 112, and the operating shaft A1 is movably matched with the locking portion 21 of the locking plate 2; the working principle of the present invention is specifically as follows:

[0035] In the present invention, when the telescopic rod 41 of the locking electromagnet 4 is in the extended state, the locking plate 2 is in the locked position under the action of the return spring 3. Therefore, the telescopic rod 41 of the locking electromagnet 4 forms a limiting match with the locking plate 2 to limit the locking plate 2 to the locked position, thereby driving the locking portion 21 of the locking plate 2 to maintain a matching state with the operating shaft A1 of the grounding switch A, so that the operating shaft A1 of the operating switch A is locked and cannot be operated. At this time, the grounding switch locking device of the present invention is in the locked state;

[0036] When the telescopic rod 41 of the locking electromagnet 4 of the present invention is in a retracted state, the grounding switch locking device of the present invention is in an unlocked state. At this time, the telescopic rod 41 of the locking electromagnet 4 does not form a limiting fit with the locking dial plate 2, so that the locking dial plate 2 can be rotated from the locked position to the unlocked position. In this way, the operator can rotate the locking dial plate 2 from the locked position to the unlocked position to unlock the operating shaft A1 of the operating switch A, so that the operator can operate the operating shaft A1 of the grounding switch A through the operating handle of the grounding switch A.

[0037] In the present invention, since the telescopic rod 41 of the locking electromagnet 4 passes through the limiting hole 111 of the mounting plate 11, the limiting hole 111 will limit and protect the telescopic rod 41 of the locking electromagnet 4, so as to prevent the telescopic rod 41 of the locking electromagnet 4 from being deformed by external force, and the telescopic rod 41 of the locking electromagnet 4 can be stably and reliably extended and retracted, thereby making the grounding switch locking device of the present invention stable and reliable to use. In addition, the grounding switch locking device of the present invention has fewer parts, and the locking electromagnet 4 is smaller in size and cost than the existing electromagnetic lock, which makes the grounding switch locking device of the present invention lower in cost and smaller in size.

[0038] In the present invention, the operating shaft A1 of the grounding switch A can form a neck A11 to cooperate with the locking portion 21 of the locking plate 2, and the operating shaft A1 of the grounding switch A also has a polygonal column A12 for the operating handle of the grounding switch A to be sleeved; when the locking plate 2 is maintained at the locked position, the locking portion 21 of the locking plate 2 remains inserted into the neck A11 of the operating shaft A1, and at this time, the operating handle of the grounding switch A is blocked by the locking portion 21 and cannot be sleeved on the polygonal column A12 of the operating shaft A1, so that the operator cannot operate the operating shaft A1 of the grounding switch A through the operating handle of the grounding switch A. In the present invention, the locking portion 21 of the locking plate 2 may be provided with an inclined pushing surface 211. When the grounding switch locking device of the present invention is in an unlocked state, the operating handle of the grounding switch A is sleeved on the operating shaft A1, and the operating handle of the grounding switch A pushes the pushing surface 211, thereby driving the locking plate 2 to rotate to the unlocked position, and then the operating handle of the grounding switch A is sleeved on the polygonal cylinder A12 of the operating shaft A1, which is convenient for the operator to use.

[0039] In the present invention, the locking plate 2 is further provided with a stopper 22, and the stopper 22 and the locking part 21 of the locking plate 2 are respectively located on both sides of the locking plate 2; the telescopic rod 41 of the locking electromagnet 4 is movably abutted against the stopper 22 of the locking plate 2, so that the telescopic rod 41 and the locking plate 2 are movably limited, thereby controlling whether the locking plate 2 is limited to the locked position. The mounting plate 11 may be provided with a spring connection part 113, and the two ends of the reset spring 3 are respectively connected to the spring connection part 113 of the mounting plate 11 and the stopper 22 of the locking plate 2, so that the reset spring 3 can drive the locking plate 2 to rotate to the locked position.

[0040] In the present invention, the locking plate 2 can be arranged parallel to the mounting plate 11, and the locking plate 2 and the locking electromagnet 4 are respectively located on both sides of the mounting plate 11; the present invention is arranged in this way, so that the structure of the grounding switch locking device of the present invention can be made more compact, which helps to reduce the volume of the grounding switch locking device of the present invention.

[0041] In the present invention, the locking plate 2 may be provided with an arc-shaped hole 23, the center of which is located on the rotation center axis of the locking plate 2; the mounting plate 11 cooperates with a limiting column 114, and the limiting column 114 is movably inserted into the arc-shaped hole 23; the present invention enables the locking plate 2 to rotate between a locked position and an unlocked position through the cooperation between the arc-shaped hole 23 and the limiting column 114; when the limiting column 114 abuts against one side of the arc-shaped hole 23, the locking plate 2 is in the locked position; and when the limiting column 114 abuts against the other side of the arc-shaped hole 23, the locking plate 2 is in the unlocked position.

[0042] In the present invention, the base 1 includes a base 12 and a mounting plate 11; the mounting plate 11 can be detachably connected to the base 12, and the locking electromagnet 4 is mounted on the base 12 of the base 1; the present invention is configured in this way so that the present invention can replace different mounting plates 11 and locking dial plates 2 according to different grounding switches, thereby improving the adaptability of the present invention. Specifically, the mounting plate 11 and the base 12 can be detachably connected by screws. The locking electromagnet 4 can be detachably connected to the base 12 to facilitate replacement and maintenance of the locking electromagnet 4; the base 12 can be detachably connected to an electromagnet bracket 13, the locking electromagnet 4 is mounted on the electromagnet bracket 13, the base 12 and the electromagnet bracket 13 can be detachably connected by screws, and the locking electromagnet 4 and the electromagnet bracket 13 can also be detachably connected by screws.

[0043] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made thereto by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A grounding switch locking device, characterized in that: It includes a base, a locking plate, a return spring and a locking electromagnet; The base is provided with a mounting plate, the mounting plate is provided with a limit hole and an operating hole for the operating shaft of the grounding switch to pass through; The locking plate is rotatably connected to the mounting plate, and the locking plate rotates between a locking position and an unlocking position. The locking plate is provided with a locking portion, which is used to cooperate with the operating shaft of the grounding switch to control whether the operating shaft is locked or not; the locking plate is provided with an arc-shaped hole, and the center of the arc-shaped hole is located on the rotation center axis of the locking plate; the mounting plate is equipped with a limiting column, and the limiting column is movably inserted into the arc-shaped hole; when the limiting column abuts against one side of the arc-shaped hole, the locking plate is in the locking position; and when the limiting column abuts against the other side of the arc-shaped hole, the locking plate is in the unlocking position; The return spring cooperates with the locking plate and the mounting plate, and is used to drive the locking plate to rotate to the locking position; The locking electromagnet is installed on the base, and the locking electromagnet has a telescopic rod that can be telescopically moved, the telescopic rod movably passes through the limiting hole, and the telescopic rod is movably limited and matched with the locking plate; When the telescopic rod of the locking electromagnet forms a limiting fit with the locking plate, the locking plate is limited to the locking position, so that the locking portion of the locking plate maintains a matching state with the operating shaft of the grounding switch, thereby locking the operating shaft of the operating switch and making it impossible to operate.

2. A grounding switch locking device as claimed in claim 1, characterized in that: The locking plate is also provided with a stopper, and the stopper and the locking part of the locking plate are respectively located on both sides of the locking plate; the telescopic rod of the locking electromagnet is movably abutted against the stopper of the locking plate.

3. A grounding switch locking device as claimed in claim 2, characterized in that: The mounting plate is provided with a spring connecting portion, and the two ends of the return spring are respectively connected to the spring connecting portion of the mounting plate and the stopper of the locking plate.

4. A grounding switch locking device as claimed in claim 1, characterized in that: The locking plate is arranged in parallel with the mounting plate, and the locking plate and the locking electromagnet are respectively located on two sides of the mounting plate.

5. A grounding switch locking device as claimed in claim 1, characterized in that: The locking portion of the locking plate is provided with an inclined pushing surface.

6. A grounding switch locking device as claimed in claim 1, characterized in that: The base includes a pedestal and the mounting plate; the mounting plate is detachably connected to the base, and the locking electromagnet is mounted on the pedestal.

7. A grounding switch locking device as claimed in claim 6, characterized in that: The mounting plate and the base are detachably connected via screws.

8. A grounding switch locking device as claimed in claim 6, characterized in that: The locking electromagnet is detachably connected to the base.

9. A grounding switch locking device as claimed in claim 8, characterized in that: The base is detachably connected to an electromagnet bracket, and the locking electromagnet is installed on the electromagnet bracket.

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