Load switch structure with emergency power-off function
By introducing levers and limit components into the load switch, the problem of difficulty in emergency power cut-off caused by the absolute locking mechanism is solved, realizing rapid power cut-off and protection against misoperation, and improving the safety and flexibility of the load switch.
Patent Information
- Application Number
- CN202423050469.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-11
AI Technical Summary
The locking mechanism of existing load switches is relatively absolute, and they cannot be quickly turned off after operation, which may cause serious consequences in the event of an emergency power outage.
A load switch structure with emergency power-off function was designed. By providing a radial lever and a first limiting component at the knob, including a sliding limit block and a guide surface, the knob can be directly rotated from the closed state to the open state, while a second limiting component prevents accidental closing.
It enables rapid power cut-off in emergency situations, while preventing accidental closing and opening, thus improving the safety and operational reliability of the load switch.
Smart Images
Figure CN223501715U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electrical equipment technology, and in particular relates to a load switch structure with emergency power-off function. Background Technology
[0002] A load switch is a type of switching device that falls between a circuit breaker and a disconnector. It is generally equipped with a simple arc-extinguishing device, but its structure is relatively simple.
[0003] Existing load switches have an integrated handle or knob, which, compared to separate units, allows for emergency power cut-off and power-on functions without the need to find a separate handle for installation. Some common load switches on the market have a locking mechanism on the knob, which prevents the knob from being turned directly, i.e., it cannot open or close the circuit breaker, and a key is required to unlock it. The purpose of this is to prevent accidental operation by personnel. However, this locking mechanism is relatively absolute. After operation, the knob cannot be turned to open the circuit breaker. In some situations where an emergency power cut-off is required, the inability to turn the knob to open the circuit breaker in a short time may cause serious consequences. Utility Model Content
[0004] This utility model addresses the problem that the locking mechanism in the prior art is too absolute, and after operation, the knob cannot be rotated to open the circuit breaker. In some situations where emergency power cut is required, the inability to rotate the knob to open the circuit breaker in a short time may cause serious consequences. The following technical solution is proposed: a load switch structure with emergency power cut function, including a switch body with a knob on the end face, a lever extending radially at the knob, and a first limiting component at the end face of the switch body.
[0005] The first limiting assembly includes a first mounting base connected to the switch body and located at the closing and opening paths of the lever; the first mounting base is provided with a first limiting block that slides along the axial direction of the knob and has a spring inside; the spring is used to prevent the first limiting block from flipping the lever; the first limiting block has a guide surface on its side wall near the closing direction.
[0006] The first limit block prevents the lever (or knob) from being adjusted from the open to the closed state, thus preventing accidental closing. Meanwhile, the guide surface allows the lever (or knob) to be adjusted directly from the closed to the open state, providing an emergency power-off function.
[0007] As a preferred embodiment of the above technical solution, the first mounting base is provided with a sliding cavity arranged along the axial direction of the knob; the side wall is provided with a sliding opening that communicates with the sliding cavity; the first limiting block is slidably engaged with the sliding cavity, and a detachably connected limiting plate is provided on one side; the limiting plate extends through the sliding opening to the outside of the first mounting base; and a spring is provided between the bottom of the sliding cavity and the first limiting block.
[0008] The limiting plate allows the first limiting block to be limited and slid at the sliding cavity, preventing it from detaching from the sliding cavity.
[0009] As a preferred embodiment of the above technical solution, the bottom of the sliding cavity is provided with a groove for engaging with the end of the spring.
[0010] The groove design allows for a certain degree of spring limitation, preventing it from shifting inside the sliding cavity and causing the first limiting block to fail to rebound after being pressed, thus maintaining the state of the blocking lever flipped over.
[0011] As a preferred embodiment of the above technical solution, the end face of the switch body is provided with an open label and an closed label, which are located in the open and closed positions of the knob, respectively; the first limit block is located between the open label and the closed label.
[0012] The trip and closing labels facilitate correct operation by operators and indicate to installers where the first and second limit components are installed.
[0013] As a preferred embodiment of the above technical solution, the guide surface is disposed on one side of the first limiting block, and this side can remain parallel to the length direction of the lever.
[0014] The guide surface is positioned so that when the lever moves from the closed state to the open state, it can contact the guide surface. After contact, the lever continues to rotate so that the first limit block is pushed into the sliding cavity, thereby allowing the lever, i.e. the knob, to rotate to the open state, so that it can cut off the power in an emergency.
[0015] As a preferred embodiment of the above technical solution, a second limiting component is provided on the side of the first limiting component near the trip label; the second limiting component includes a second mounting base connected to the first mounting base; a slot is provided at the second mounting base; a second limiting block is fitted at the slot; a lead screw is provided on one side of the second limiting block, which is threadedly engaged with the second mounting base; the lead screw is used to drive the second limiting block to move between the limiting plate and the switch body when rotated.
[0016] The design incorporates a screw that rotates to move the second limiting block between the limiting plate and the switch body, preventing the limiting plate from moving and thus preventing the first limiting block from sliding into the sliding cavity. In this case, the lever or knob cannot be adjusted to any state, enabling the switch to have multiple functions and adapt to more usage scenarios.
[0017] The beneficial effects of this utility model are as follows:
[0018] (1) The present invention provides a first limiting component at the switch body. The first limiting component includes a first limiting block for blocking the rotation of the knob. However, a guide surface is provided near the closing position of the first limiting block, so that the operator can directly rotate the knob from the closing position to the opening position, but cannot directly rotate it from the opening position to the closing position, so that it can be used in situations where it is necessary to prevent accidental closing but an emergency power cut is required.
[0019] (2) The present invention provides a second limiting component at the first limiting component. The second limiting component can prevent the limiting block of the first limiting component from moving, thereby preventing the knob from rotating to any position. This not only has the above-mentioned effect, but also has the effect of preventing accidental closing and accidental opening in the prior art. Attached Figure Description
[0020] Figure 1 The diagram shown is a schematic of the switch body in the open state in Embodiment 1;
[0021] Figure 2 The diagram shown is a schematic of the knob rotating toward the open position in Embodiment 1;
[0022] Figure 3 The image shown is a side view of the switch body in Embodiment 1;
[0023] Figure 4 The diagram shown is a split view of the first limiting component and the second limiting component in Embodiment 1. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Example
[0025] Figure 1 The diagram shown is a structural schematic of a specific embodiment of the present invention.
[0026] A load switch structure with emergency power-off function includes a switch body 1 with a knob 2 at the end face, a lever 3 extending radially at the knob 2, and a first limiting component 4 at the end face of the switch body 1.
[0027] The first limiting component 4 includes a first mounting base 11 connected to the switch body 1 and located at the closing and opening path of the lever 3; the first mounting base 11 is provided with a first limiting block 9 that slides along the axial direction of the knob 2 and has a spring 14 inside; the spring 14 is used to prevent the first limiting block 9 from flipping the lever 3; the first limiting block 9 is provided with a guide surface 8 on the side wall near the closing direction.
[0028] The first limiting block 9 prevents the lever 3 (knob 2) from being adjusted from the open to the closed state, thus preventing accidental closing. The guide surface 8 allows the lever 3 (knob 2) to be adjusted directly from the closed to the open state, providing an emergency power-off function. The switch body 1 is a known load switch, containing an arc-extinguishing device, a transmission system that works with the knob for opening and closing, moving contacts, stationary contacts, and a spring energy storage mechanism. Since this is not within the scope of the improved structure, its specific construction will not be described in detail.
[0029] In this embodiment, the first mounting base 11 is provided with a sliding cavity 13 arranged along the axial direction of the knob 2; the side wall is provided with a sliding opening 17 that communicates with the sliding cavity 13; the first limiting block 9 is slidably engaged with the sliding cavity 13, and a detachably connected limiting plate 10 is provided on one side; the limiting plate 10 extends through the sliding opening 17 to the outside of the first mounting base 11; the spring 14 is disposed between the bottom of the sliding cavity 13 and the first limiting block 9.
[0030] The limiting plate 10 allows the first limiting block 9 to be limited and slid at the sliding cavity 13, preventing it from detaching from the sliding cavity 13.
[0031] In this embodiment, the bottom of the sliding cavity 13 is provided with a groove 15, which is used to cooperate with the end of the spring 14.
[0032] The groove 15 can limit the spring 14 to a certain extent, preventing it from shifting inside the sliding cavity 13 and causing the first limiting block 9 to fail to rebound after being pressed, thus keeping the blocking lever 3 in a flipped state.
[0033] In this embodiment, the end face of the switch body 1 is provided with an open label 6 and an closed label 7, which are located in the open state position and the closed state position of the knob 2, respectively; the first limit block 9 is located between the open label 6 and the closed label 7.
[0034] The tripping label 6 and closing label 7 facilitate correct operation by the operator and indicate to the installer where the first limit component 4 and the second limit component 5 are installed.
[0035] In this embodiment, the guide surface 8 is disposed on one side of the first limiting block 9, and this side can remain parallel to the length direction of the lever 3.
[0036] The guide surface 8 is positioned such that when the lever 3 moves from the closed state to the open state, it can contact the guide surface 8. After contact, the lever 3 continues to rotate, which can push the first limit block 9 into the sliding cavity 13, so that the lever 3, i.e. the knob 2, can rotate to the open state, so that it can cut off the power in an emergency.
[0037] In this embodiment, a second limiting component 5 is provided on the side of the first limiting component 4 near the trip label 6; the second limiting component 5 includes a second mounting base 12 connected to the first mounting base 11; a slot 16 is provided at the second mounting base 12; a second limiting block 19 is fitted at the slot 16; a lead screw 18 is provided on one side of the second limiting block 19 and threadedly engaged with the second mounting base 12; the lead screw 18 is used to drive the second limiting block 19 to move between the limiting plate 10 and the switch body 1 when rotated.
[0038] The setting that the second limiting block 19 can be moved between the limiting plate 10 and the switch body 1 by rotating the lead screw 18 makes the limiting plate 10 unable to move, that is, the first limiting block 9 cannot slide into the sliding cavity 13. At this time, the lever 3, i.e. the knob 2, cannot adjust any state, so that the switch can have multiple functions and adapt to more usage scenarios.
[0039] Working principle: When the load switch needs to be in a state that has both emergency power-off function and accidental closing function, rotate the screw 18 to retract the second limit block 19 into the slot 16, so that the limit plate 10 can be displaced, that is, the first limit block 9 can slide freely in the sliding cavity 13; when closing in this state, the first limit block 9 needs to be manually pressed so that the lever 3 can be flipped to the closing label 7 position, that is, the closing state; when opening in this state, the lever 3 can be directly flipped. When the lever 3 is flipped, it will contact the guide surface 8, and in turn, push the first limit block 9 into the sliding cavity 13 to compress the spring 14, so that the lever 3 can open directly without obstruction, which is suitable for emergency power-off situations.
[0040] When the load switch needs to be in a state that can both open and close accidentally, rotate the screw 18 to place the second limit block 19 between the limit plate 10 and the switch body 1. At this time, the limit plate 10 cannot move, that is, the first limit block 9 cannot slide into the sliding cavity 13. At this time, the lever 3, i.e. the knob 2, cannot adjust any state.
[0041] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.
Claims
1. A load switch structure with emergency power-off function, comprising a switch body (1) with a knob (2) at one end face, characterized in that, A lever (3) extending radially is provided at the knob (2), and a first limiting component (4) is provided at the end face of the switch body (1). The first limiting component (4) includes a first mounting base (11) connected to the switch body (1) and located at the closing and opening path of the lever (3); the first mounting base (11) is provided with a first limiting block (9) that slides along the axial direction of the knob (2) and has a spring (14) inside; the spring (14) is used to enable the first limiting block (9) to prevent the lever (3) from flipping; the first limiting block (9) is provided with a guide surface (8) on the side wall near the closing direction.
2. The load switch structure with emergency power-off function according to claim 1, characterized in that, The first mounting base (11) is provided with a sliding cavity (13) arranged along the axial direction of the knob (2); the side wall is provided with a sliding opening (17) that communicates with the sliding cavity (13); the first limiting block (9) is slidably engaged with the sliding cavity (13), and a detachably connected limiting plate (10) is provided on one side; the limiting plate (10) extends through the sliding opening (17) to the outside of the first mounting base (11); the spring (14) is provided between the bottom of the sliding cavity (13) and the first limiting block (9).
3. A load switch structure with emergency power-off function according to claim 2, characterized in that, The bottom of the sliding cavity (13) is provided with a groove (15), which is used to cooperate with the end of the spring (14).
4. A load switch structure with emergency power-off function according to claim 3, characterized in that, The switch body (1) is provided with a trip label (6) and a close label (7) on its end face. The trip label (6) and the close label (7) are located in the trip position and the close position of the knob (2), respectively. The first limit block (9) is located between the trip label (6) and the close label (7).
5. A load switch structure with emergency power-off function according to claim 4, characterized in that, The guide surface (8) is located on one side of the first limiting block (9), and this side is parallel to the length direction of the lever (3).
6. A load switch structure with emergency power-off function according to claim 5, characterized in that, The first limiting component (4) has a second limiting component (5) on the side near the trip label (6); the second limiting component (5) includes a second mounting base (12) connected to the first mounting base (11); the second mounting base (12) has a slot (16); the slot (16) is fitted with a second limiting block (19); the second limiting block (19) has a screw (18) threadedly engaged with the second mounting base (12) on one side; the screw (18) is used to drive the second limiting block (19) to move between the limiting plate (10) and the switch body (1) when rotating.