Electrical switch anti-misoperation device

Abstract

The utility model relates to an anti-misoperation device for an electrical switch, which comprises a U-shaped clamp used for clamping and fixing the front side of the electrical switch and shielding a switch handle, the closed end of the U-shaped clamp is a vertically-arranged protective plate, at least one of the two side edges of the U-shaped clamp is a movable clamping plate, and a vertical channel for a spring to be installed in is arranged in the protective plate. The movable clamping plate is connected with the protection plate through a connecting rod bolt with a nut, the connecting rod bolt sequentially penetrates through the protection plate and the movable clamping plate through the vertical channel and then is in threaded connection with the nut, the spring is arranged on the connecting rod bolt in a sleeving mode, and the middle of the protection plate is provided with a limiting tongue plate which extends towards the opening end of the U-shaped clamp to limit movement of the switch handle. The low-voltage switch protection device has the advantages that protection and limiting are provided through a specific mechanical structure, it is ensured that the low-voltage switch cannot be operated by mistake under the condition that operation conditions are not met, equipment damage and safety accidents caused by misoperation are effectively avoided, the low-voltage switch protection device is easy to operate and convenient to use, a specially-assigned person is not needed for nursing, and work safety of operators is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of safety protection of electric switches in power systems, and in particular relates to an anti-error device for electric switches. Background Art

[0002] Power systems often contain switching devices that require specific conditions to operate. Misoperation of these devices can cause significant damage to equipment and even lead to safety accidents. Therefore, effectively preventing misoperation of these devices has become an unresolved issue. Electrical switch misoperation prevention devices primarily protect switching devices in electrical and control circuits, particularly those that require operation under specific circumstances, such as knife switches and circuit breakers. These switching devices play a critical control and protection role in power systems, and preventing their misoperation is crucial for ensuring safe and stable operation. Existing electrical switch misoperation prevention devices often suffer from the following issues: poor adaptability and difficulty adapting to electrical switches of varying specifications; cumbersome installation and disassembly; poor stability after installation; and the tendency to slip when subjected to external forces; lack of a direct mechanism to limit the switch key, allowing the switch key to be operated even after inserting a tool into the protective housing, still presenting the risk of misoperation. Utility Model Content

[0003] The utility model provides an anti-error device for an electrical switch, aiming to overcome the above-mentioned deficiencies in the prior art to at least a certain extent.

[0004] The U-shaped clamp has a cam portion for retaining the switch in a fixed position so as to prevent the switch from sliding upwards or downwards, and the U-shaped clamp has a cam portion for retaining the switch in a fixed position so as to prevent the switch from sliding upwards or downwards.

[0005] On the basis of the above technical solution, the present invention can also be improved as follows.

[0006] Furthermore, the vertical grooves are respectively provided on the left and right sides of the protective plate. The vertical grooves are cylindrical grooves. The spring and the connecting rod bolt both enter the vertical grooves from one end. A through hole is provided at the center of the inner end wall of the vertical groove for one end of the connecting rod bolt to pass through. The inner diameter of the through hole is smaller than the inner diameter of the vertical groove.

[0007] Furthermore, the movable splint is located on the upper side of the open end of the U-shaped clamp, and the lower side of the open end of the U-shaped clamp is a fixed splint fixedly connected to the protective plate.

[0008] Furthermore, the upper surface of the movable splint is provided with a limiting groove corresponding to the nut, and the upper end of the connecting rod bolt passes through the movable splint from the bottom of the movable splint upward and enters the limiting groove and is threadedly connected to the nut. The peripheral wall of the limiting groove is a regular polygon that matches the peripheral wall of the nut.

[0009] Furthermore, the nut is a round-headed ball nut with one end open.

[0010] Furthermore, the nut is a hexagonal nut with openings at both upper and lower ends.

[0011] Furthermore, a plurality of friction strips are fixedly adhered to the clamping end surfaces of the movable clamping plate and the fixed clamping plate that are opposite to each other at the opening end of the U-shaped clamp.

[0012] Furthermore, there are two movable splints, which are respectively connected to the upper end and the lower end of the protective plate through the connecting rod bolts, nuts and springs.

[0013] Furthermore, a plurality of friction strips are fixedly adhered to the clamping end surfaces of the two movable clamps that are opposite to each other at the open end of the U-shaped clamp.

[0014] Furthermore, the movable splint is provided with a limiting groove corresponding to the nut, and the nut can be moved axially in the limiting groove and positioned in the circumferential direction, and the axial dimension of the nut is smaller than the axial dimension of the limiting groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] Due to the presence of the spring, the movable clamping plate on one side or both sides of the U-shaped clamp can be moved relative to the protective plate and pulled apart. The restoring force of the spring enables the two movable clamping plates or the movable clamp and the fixed clamping plate to clamp the front side of the electrical switch. After clamping, the protective plate can shield the switch handle to avoid accidental operation of the switch handle during normal use. In addition, a limiting tongue is fixed on the protective plate, and the limiting tongue can prevent the switch handle from resetting. Even if someone uses a tool to enter the U-shaped clamp through the gaps on both sides of the U-shaped clamp and apply force to the switch handle, the switch handle cannot be displaced due to the presence of the limiting tongue, so the anti-misoperation effect is better.

[0017] Based on a survey of various air switches and disconnect switches on the market, the appropriate spring specifications and connecting rod bolt dimensions for the device were determined. This electrical switch anti-malfunction device can provide stable and secure clamping for both the smallest (where spring compression is minimal but clamping force is sufficient) and largest (where spring compression is maximum and clamping force is greater), demonstrating excellent applicability. When the nut is a hexagonal nut with open ends, rotating the connecting rod bolt changes the nut's position on the connecting rod bolt, ensuring flexible adjustment of the clamping force.

[0018] Friction strips are provided on the movable splint and / or the fixed splint, which can increase the static friction between the splint and the electrical switch when clamped and fixed, ensuring that the anti-error device provided by the utility model is not easy to fall off from the electrical switch when subjected to external force, thereby ensuring better protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an axonometric diagram of an electrical switch anti-error device provided by the utility model;

[0020] Figure 2 for Figure 1 The front view of the electrical switch anti-error device shown;

[0021] Figure 3 for Figure 2 Bottom view of the electrical switch anti-error device shown;

[0022] Figure 4 for Figure 2 A top view of the electrical switch anti-error device shown;

[0023] Figure 5 for Figure 4 The cross-sectional view of the electrical switch anti-error device along AA is shown;

[0024] Figure 6 for Figure 5 The structure shown is a schematic diagram after omitting the nuts and connecting rod bolts;

[0025] Figure 7An axonometric drawing of an electrical switch anti-error device with two upper and lower movable clamping plates clamped to the front side of the disconnector;

[0026] Figure 8 for Figure 7 A cross-sectional view of the electrical switch anti-error device along the connecting rod nut in the front-to-back direction.

[0027] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0028] 1. Protective plate; 2. Movable splint; 3. Spring; 4. Vertical groove; 5. Nut; 6. Connecting rod bolt; 7. Limit tongue; 8. Through hole; 9. Fixed splint; 10. Limit groove; 11. Friction strip. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] In the description of the present invention, if terms indicating directions such as "up", "down", "left", "right", "top", "bottom", "inside" and "outside" are used, the directions or positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0031] like Figures 1 to 8 The cam 24 is a vertical cam 24 that is used to hold the switch in place and to lock the switch handle, and the cam 24 has a U-shaped handle 24 for locking the switch handle in a closed position.

[0032] It should be noted that the U-shaped clamp is preferably made of a weather-resistant, non-conductive insulating material to ensure durability while minimizing the risk of electrical leakage, enhancing safety. The movable clamp is designed with an arc-shaped curve at the end that holds the electrical switch, making it easier to clamp the switch. The spring provides flexibility and clamping force for the entire anti-error device, making it compatible with products of varying specifications.

[0033] The above-mentioned electrical switch anti-error device can post warning signs and safety terms on the outer surface of the protective plate to remind others that the electrical switch cannot be operated unless necessary, thereby preventing others from operating the electrical switch by mistake.

[0034] In one embodiment of the present utility model, the vertical groove 4 is provided on the left and right sides of the protective plate 1 respectively, and the vertical groove 4 is a cylindrical groove. The spring 3 and the connecting rod bolt 6 both enter the vertical groove 4 from one end, and a through hole 8 is opened at the center of the inner end wall of the vertical groove 4 for one end of the connecting rod bolt 6 to pass through. The inner diameter of the through hole 8 is smaller than the inner diameter of the vertical groove 4.

[0035] It can be understood that the vertical groove is a blind groove rather than a through groove, and the through hole does not belong to the vertical groove. The inner diameter of the through hole is smaller than the vertical groove, so a circular surface is formed at the inner end wall of the vertical groove to press against one end of the spring.

[0036] In one embodiment of the present invention, Figures 1 to 6 As shown, the movable splint 2 is located on the upper side of the open end of the U-shaped clamp, and the lower side of the open end of the U-shaped clamp is a fixed splint 9 fixedly connected to the protective plate 1. The fixed splint and the protective plate can be formed as one piece.

[0037] In one embodiment of the present utility model, the upper surface of the movable splint 2 is provided with a limiting groove 10 corresponding to the nut 5, and the upper end of the connecting rod bolt 6 passes through the movable splint 2 from the bottom of the movable splint 2 upward and enters the limiting groove 10 and is threadedly connected to the nut 5. The surrounding wall of the limiting groove 10 is a regular polygon that matches the surrounding wall of the nut 5.

[0038] It should be noted that the nut cannot rotate within the polygonal retaining groove because it fits within the retaining groove. However, when the connecting rod bolt is rotated, the connecting rod bolt can move axially relative to the nut, allowing the nut and connecting rod bolt to be tightened or loosened. When the nut and connecting rod bolt are loosened and disengaged, the movable splint can be completely separated from the protective plate. Therefore, if the movable splint is damaged, the two can be separated using the above method and replaced with a new one.

[0039] In one embodiment of the present invention, the nut 5 is a round ball nut with an open end, specifically as follows Figure 1 、4 and 5.

[0040] In another embodiment of the present invention, the nut 5 is a hexagonal nut with openings at both ends. In this embodiment, one end of the connecting rod bolt connected to the nut can pass through the nut, so the position of the nut on the connecting rod bolt can shift as the connecting rod bolt rotates, so the clamping force can be adjusted to avoid the problem of the electrical switch being easily fallen off due to too little clamping force or being damaged by too much clamping force when clamping the electrical switch.

[0041] In another embodiment of the present invention, the movable splint 2 and the fixed splint 9 are respectively fixedly attached with a plurality of friction strips 11 at intervals on the clamping end surfaces facing each other at the opening end of the U-shaped clamp. The friction strips can be in the shape of a round cake (such as Figure 1 As shown), frustum or rectangular strip, the material of the friction strip can be rubber or the like.

[0042] In another embodiment of the present invention, Figure 7 and 8 As shown, there are two movable clamps 2, which are respectively connected to the upper and lower ends of the protective plate 1 through the connecting rod bolts 6, nuts 5 and springs 3. At this time, both movable clamps can move up and down relative to the protective plate. After clamping, the protective plate is basically located in the middle of the electrical switch.

[0043] In another embodiment of the present invention, a plurality of friction strips 11 are fixedly attached to the clamping end surfaces of the two movable clamping plates 2 facing each other at the open end of the U-shaped clamp. "Several" includes both one and multiple friction strips. When there are multiple friction strips, the friction strips (in the form of round pancakes or short strips) on each clamping end surface are evenly spaced. When there is only one friction strip, it is longer (long strip).

[0044] In another embodiment of the present invention, the movable plate 2 is provided with a limiting recess 10 corresponding to the nut 5. The nut 5 can be moved axially within the limiting recess 10 for circumferential positioning. The axial dimension of the nut 5 is smaller than the axial dimension of the limiting recess 10. In this embodiment, the nut can be completely concealed within the limiting recess. In this way, when in use, the entire electrical switch anti-error device has no exposed metal parts, providing improved safety.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electrical switch anti-error device, characterized in that: The invention relates to a U-shaped clamp for clamping and fixing the front side of an electrical switch and shielding a switch handle, wherein the closed end of the U-shaped clamp is a vertically arranged protective plate (1), and at least one side of the upper and lower sides of the open end of the U-shaped clamp is arranged as a movable clamp (2) that can move up and down in the vertical direction relative to the protective plate (1), and a vertical groove (4) for installing a spring (3) is provided in the protective plate (1), and the movable clamp (2) is connected to the protective plate (1) by a connecting rod bolt (6) with a nut (5). The connecting rod bolt (6) passes through the protective plate (1) and the movable clamp (2) in sequence through the vertical groove (4) and is then threadedly connected to the nut (5). The spring (3) is sleeved on the connecting rod bolt (6). One end of the spring (3) is pressed against the head of the connecting rod bolt (6) away from the nut (5), and the other end is pressed against the inner end wall of the vertical groove (4). The middle part of the protective plate (1) has a limiting tongue plate (7) extending toward the open end of the U-shaped clamp to limit the movement of the switch handle.

2. The electrical switch anti-error device according to claim 1, characterized in that: The vertical groove (4) is provided on the left and right sides of the protective plate (1), respectively. The vertical groove (4) is a cylindrical groove. The spring (3) and the connecting rod bolt (6) both enter the vertical groove (4) from one end. A through hole (8) for one end of the connecting rod bolt (6) to pass through is provided at the center of the inner end wall of the vertical groove (4). The inner diameter of the through hole (8) is smaller than the inner diameter of the vertical groove (4).

3. The electrical switch anti-error device according to claim 2, characterized in that: The movable clamp (2) is located on the upper side of the open end of the U-shaped clamp, and the lower side of the open end of the U-shaped clamp is a fixed clamp (9) fixedly connected to the protective plate (1).

4. The electrical switch anti-error device according to claim 3, characterized in that: The upper surface of the movable splint (2) is provided with a limiting groove (10) corresponding to the nut (5); the upper end of the connecting rod bolt (6) passes through the movable splint (2) from the bottom of the movable splint (2) upward and enters the limiting groove (10) and is threadedly connected with the nut (5); the peripheral wall of the limiting groove (10) is a regular polygon that matches the peripheral wall of the nut (5).

5. The electrical switch anti-error device according to claim 4, characterized in that: The nut (5) is a round ball nut with an open end.

6. The electrical switch anti-error device according to claim 4, characterized in that: The nut (5) is a hexagonal nut with openings at both upper and lower ends.

7. An electrical switch error prevention device according to any one of claims 3 to 6, characterized in that: The movable clamping plate (2) and the fixed clamping plate (9) are respectively fixedly adhered with a plurality of friction strips (11) at intervals on the clamping end surfaces facing each other at the opening end of the U-shaped clamp.

8. The electrical switch anti-error device according to claim 2, characterized in that: There are two movable splints (2) which are respectively connected to the upper end and the lower end of the protective plate (1) through the connecting rod bolt (6), the nut (5) and the spring (3).

9. The electrical switch anti-error device according to claim 8, characterized in that: A plurality of friction strips (11) are fixedly adhered to the clamping end surfaces of the two movable clamps (2) facing each other at the opening end of the U-shaped clamp.

10. An electrical switch anti-error device according to claim 8 or 9, characterized in that: The movable splint (2) is provided with a limiting groove (10) corresponding to the nut (5), and the nut (5) can be moved axially in the limiting groove (10) and positioned in the circumferential direction. The axial dimension of the nut (5) is smaller than the axial dimension of the limiting groove (10).

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