Grounding switch with buffer device and switch cabinet
By incorporating a buffer device in the grounding switch, including a bracket, buffer pad, upper and lower baffles, and reinforcing ribs, combined with a baffle plate and frame to restrict the rotation of the main shaft, the problem of overshoot of the moving contact is solved, thereby improving the reliability and stability of the grounding switch.
Patent Information
- Application Number
- CN202423285751.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing grounding switches are prone to overshoot of moving contacts during closing, which reduces reliability.
A buffer device is installed in the grounding switch, including a bracket and a buffer pad. The buffer pad is supported by the bracket, and the moving contact is blocked by the buffer pad when there is overshoot, so as to prevent it from falling off the stationary contact. The upper and lower baffles and reinforcing ribs prevent the buffer pad from being damaged. The baffle plate and frame limit the rotation angle of the main shaft to avoid overshoot when closing.
It effectively prevents the moving contact from detaching from the stationary contact, improves the reliability and stability of the grounding switch, reduces damage to the buffer device, and lowers costs.
Smart Images
Figure CN223771016U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of power system, especially a grounding switch and switch cabinet with buffer device. BACKGROUND
[0002] The grounding switch is an important component of the switch cabinet, which can ensure the safety of the staff during power-off maintenance. The grounding switch usually includes a main shaft, a moving contact, a static contact and a spring assembly. The moving contact is fixed to the main shaft, and the main shaft can drive the moving contact to contact or move away from the static contact. The rotation of the main shaft is completed by the driving of the spring assembly. In order to improve the closing speed of the moving contact, the energy of the spring in the spring assembly needs to be higher. At this time, it is necessary to prevent the moving contact from overshooting during closing. SUMMARY
[0003] Therefore, the utility model provides a grounding switch with buffer device, the grounding switch has main shaft, moving contact and static contact, the moving contact is fixed to the main shaft, the main shaft can drive the moving contact to contact or move away from the static contact, the static contact includes: base and static blade fixed on base, the base is fixed to support seat.
[0004] The grounding switch further includes a buffer device, which includes:
[0005] A bracket is fixed to the support seat;
[0006] A buffer pad is supported by the bracket, and the buffer pad is located at the first end of the static blade. The moving contact can contact the static blade from the second end of the static blade.
[0007] By providing a buffer device for the grounding switch, the moving contact can avoid disengaging from the static contact when it overshoots, ensuring the reliability of the grounding switch.
[0008] According to the grounding switch as described above, optionally, the bracket includes:
[0009] An upper baffle is fixed to the support seat;
[0010] A lower baffle is fixed to the upper baffle, and the buffer pad is located between the upper baffle and the lower baffle. The lower baffle abuts against the first end of the static contact.
[0011] According to the grounding switch as described above, optionally, the number of buffer pads is multiple; and / or the upper baffle and the support seat are integrally formed, which not only facilitates processing, but also reduces assembly steps.
[0012] According to the grounding switch, optionally, the upper baffle and the lower baffle are metal baffles. The presence of the lower baffle can average the force applied by the moving contact due to overshoot, avoiding that the force acts on the buffer pad for a long time and causes damage to the buffer pad.
[0013] According to the grounding switch, optionally, the bracket further comprises:
[0014] Two fixing members are respectively arranged at two ends of the upper baffle, the buffer pad and the lower baffle. In this way, the moving contact directly contacts the lower baffle during contacting the buffer device, and the moving contact is not hindered. In addition, such a fixing manner facilitates assembly and is low in cost.
[0015] According to the grounding switch, optionally, the bracket further comprises:
[0016] At least one reinforcing rib is triangular, one side of the reinforcing rib is fixed to the support seat, and the other side of the reinforcing rib is fixed to the upper baffle. In this way, deformation of the buffer device can be avoided as much as possible.
[0017] According to the grounding switch, optionally, the base is a plate-shaped body, the static blade is vertically arranged on the base, and the static blade is integrally formed with the base.
[0018] According to the grounding switch, optionally, the grounding switch further comprises:
[0019] A frame, and the main shaft is rotatably arranged on the frame;
[0020] At least one blocking plate is fixed to the main shaft and has a first side and a second side. In the case that the main shaft drives the moving contact to contact the static contact, the first side of the blocking plate can abut against the frame to limit the moving contact. In the case that the main shaft drives the moving contact to move away from the static contact, the second side of the blocking plate can abut against the frame to limit the moving contact.
[0021] In this way, the rotation angle of the main shaft can be limited by the cooperation of the blocking plate and the frame, thereby avoiding closing overshoot and limiting opening.
[0022] According to the grounding switch, optionally, the first side and the second side are straight sides. In this way, the straight sides of the blocking plate are used for limiting, and compared with point limiting, the contact area is large, so that the limiting is more reliable.
[0023] According to the grounding switch, optionally, the grounding switch further comprises a spring and a spring holder for supporting the spring, and the blocking plate is a part of the spring holder. By adjusting the structure of the spring holder, the rotation angle of the main shaft can be limited, so that the cost can be reduced as much as possible.
[0024] The utility model further provides a switchgear, including the grounding switch with buffer device of any one of above. BRIEF DESCRIPTION OF DRAWINGS
[0025] The preferred embodiments of the utility model will be described in detail below with reference to the drawings, so that the above and other features and advantages of the utility model can be more clearly understood by those skilled in the art, and the drawings are as follows:
[0026] Figure 1 It is the structural schematic diagram of the grounding switch with buffer device according to an embodiment of the utility model.
[0027] Figure 2 It is Figure 1 The side view of the grounding switch with buffer device.
[0028] Figure 3 It is the structural schematic diagram of the buffer device.
[0029] Wherein, the reference signs are as follows:
[0030] 11-main shaft
[0031] 12-moving contact
[0032] 121-fixed seat
[0033] 122-moving blade
[0034] 13-stationary contact
[0035] 131-base
[0036] 132-stationary blade
[0037] 14-frame
[0038] 141-side plate
[0039] 142-back plate
[0040] 15-blocking plate
[0041] 151-first edge
[0042] 152-second edge
[0043] 16-spring
[0044] 2-bracket
[0045] 21-Upper baffle
[0046] 22-Lower baffle
[0047] 23-Factor
[0048] 24-Reinforcing Rib
[0049] 3-Cushioning Pad
[0050] 4-Insulating Post
[0051] 5-Support base Detailed Implementation
[0052] To make the objectives, technical solutions, and advantages of this utility model clearer, the following embodiments are provided to further illustrate this utility model in detail. The nouns and pronouns referring to "person" in this patent application are not limited to specific genders.
[0053] This utility model provides a grounding switch with a buffer device to prevent overshoot of the moving contact during closing. Figures 1 to 3 As shown, the grounding switch has a main shaft 11, a moving contact 12, and a stationary contact 13. The moving contact 12 is fixed to the main shaft 11, and the main shaft 11 can drive the moving contact 12 to contact or move away from the stationary contact 13, which is fixed to the support base 5. Figures 1 to 3 As shown, the support base 5 is connected to an insulating post 4. It should be noted that each phase has a moving contact and a stationary contact, as shown... Figure 1 As shown, the grounding switch has three phases, and each phase has one moving contact 12 and one stationary contact 13.
[0054] like Figures 1 to 3 As shown, the grounding switch also includes a buffer device, which comprises a bracket 2 and a buffer pad 3. Each phase of the grounding switch has a corresponding buffer device.
[0055] The bracket 2 is fixed to the support base 5 and is used to support the buffer pad 3. The structure of the bracket 2 can be any structure, as long as it can provide support for the buffer pad 3.
[0056] The buffer pad 3 is located at the first end of the static contact 13, and the dynamic contact 12 can contact the static blade 132 from the second end of the static blade 132. The location of the buffer pad 3 at the first end of the static contact 13 means that the buffer pad 3 can be located on one side of the first end of the static contact 13, for example, abutting the first end of the static contact 13 or having a certain distance from the first end of the static contact 13. Of course, it can also mean that the buffer pad 3 partially overlaps the first end of the static contact 13. The specific position of the buffer pad 3 can be selected according to actual needs. In addition, the dynamic contact 12 can contact the static blade 132 from the second end of the static blade 132 means that the dynamic contact 12 moves to gradually approach the static blade 132 with the rotation of the main shaft 11, and gradually contacts the static blade 132 from the second end of the static blade 132. If there is an overshoot, it will at least partially separate from the static blade 132 from the first end of the static blade 132. As an example, as shown in Figures 1 to 3 the first end of the static blade 132 is the upper end, and the second end of the static blade 132 is the lower end.
[0057] The structure of the static contact 13 here can be selected according to actual needs, for example Figures 1 to 3 the static contact 13 includes a base 131 and a static blade 132 fixed on the base 131. Specifically, the base 131 is fixed on a support seat 5. The base 131 here can be a plate-shaped body, and one static blade 132 is vertically arranged on the plate-shaped body. The base 131 and the static blade 132 are integrally formed. The dynamic contact 12 also includes a fixed seat 121 and a dynamic blade 122, and the dynamic blade 122 is fixed on the fixed seat 121. The dynamic blade 122 here is two dynamic blades 122, and the two dynamic blades 122 can close the switch by clamping the static blade 132. The structure of the static contact 13 and the dynamic contact 12 can also adopt other ways, for example, the static contact 13 has two static blades 132, and the dynamic contact 12 has one dynamic blade 122. The two static blades 132 can clamp the one dynamic blade 122. The structure of the static contact 13 and the dynamic contact 12 can be set according to actual needs.
[0058] The buffer pad 3 here can be any elastic pad, such as a rubber pad. The number of buffer pads 3 can be set according to actual needs, for example Figures 1 to 3 two buffer pads 3 shown in
[0059] If the dynamic contact 12 overshoots when closing the switch, it will be blocked by the buffer pad 3, and a reverse force will be applied to the dynamic contact 12, preventing the dynamic contact 12 from separating from the static contact 13.
[0060] The utility model discloses, through setting buffer device for grounding switch, make dynamic contact 12 in the case of over-occur, due to the action of the buffer device can avoid dynamic contact 12 from static contact 13, guarantee the reliability of grounding switch.
[0061] Optionally, the bracket 2 comprises an upper baffle 21 and a lower baffle 22, the upper baffle 21 is fixed on the support base 5, the lower baffle 22 is fixed on the upper baffle 21, the buffer pad 3 is located between the upper baffle 21 and the lower baffle 22, and the lower baffle 22 is attached to the first end of the static contact 13. As an example, the upper baffle 21 and the lower baffle 22 can be metal baffles. The presence of the lower baffle 22 can evenly distribute the force exerted by the dynamic contact 12 due to over-occur, preventing the buffer pad 3 from being damaged by the force acting on it for a long time. The lower baffle 22 is attached to the first end of the static contact 13, meaning that the dynamic contact 12 will never come off the static contact 13, which can prevent the contact area between the dynamic and static contact blades from becoming smaller at the moment of closing, ensuring the reliability of the grounding switch and the pass rate of factory testing.
[0062] Optionally, the upper baffle 21 can be integrally formed with the support base 5. As shown in Figure 3 , the support base 5 has a portion protruding to form the upper baffle 21, which not only facilitates processing but also reduces assembly steps.
[0063] Optionally, the bracket 2 further comprises two fixing members 23, which are respectively provided through the upper baffle 21, the buffer pad 3, and the two ends of the lower baffle 22. In this way, the dynamic contact 12 will directly contact the lower baffle 22 during contact with the buffer device, without causing any obstruction to the dynamic contact 12. Furthermore, this fixing method is convenient for assembly and has a relatively low cost.
[0064] Optionally, the bracket 2 further comprises at least one reinforcing rib 24. Figures 1 to 3 As shown in the figure, there are two reinforcing ribs 24, which can be set according to actual needs. One side of the reinforcing rib 24 is fixed on the support base 5, and the other side is fixed on the upper baffle 21. When the dynamic contact 12 contacts the buffer device, it will exert a certain impact force on the buffer device, which may be deformed after a long time of impact. To avoid this situation, the reinforcing rib 24 is provided for the buffer device to minimize the deformation of the buffer device. As an example, the reinforcing rib 24 is triangular, which has a low cost and occupies less space.
[0065] Optionally, the grounding switch further comprises a frame 14 and at least one blocking plate 15. The main shaft 11 is rotatably arranged on the frame 14. The blocking plate 15 is fixed on the main shaft 11, and in the case where the main shaft 11 drives the dynamic contact 12 to contact the static contact 13, as shown in Figure 2As shown, the first edge 151 of the blocking plate 15 can abut against the frame 14 to limit the moving contact 12, and the second edge 152 of the blocking plate 15 can abut against the frame 14 to limit the moving contact 12 when the main shaft 11 drives the moving contact 12 away from the static contact 13. The frame 14 can include two side plates 141 fixed to the two sides of a back plate 142, and the main shaft 11 is arranged between the two side plates 141 and can rotate, and the moving contact 12 is fixed to the main shaft 11. Figure 1 and Figure 2 As shown, the first edge 151 of the blocking plate 15 can abut against the frame 14 to limit the moving contact 12, and the second edge 152 of the blocking plate 15 can abut against the frame 14 to limit the moving contact 12 when the main shaft 11 drives the moving contact 12 away from the static contact 13. The frame 14 can include two side plates 141 fixed to the two sides of a back plate 142, and the main shaft 11 is arranged between the two side plates 141 and can rotate, and the moving contact 12 is fixed to the main shaft 11. Figure 1 and Figure 2 As shown, the first edge 151 of the blocking plate 15 can abut against the frame 14 to limit the moving contact 12, and the second edge 152 of the blocking plate 15 can abut against the frame 14 to limit the moving contact 12 when the main shaft 11 drives the moving contact 12 away from the static contact 13. The frame 14 can include two side plates 141 fixed to the two sides of a back plate 142, and the main shaft 11 is arranged between the two side plates 141 and can rotate, and the moving contact 12 is fixed to the main shaft 11. Figure 1 and Figure 2 As shown, the first edge 151 of the blocking plate 15 can abut against the frame 14 to limit the moving contact 12, and the second edge 152 of the blocking plate 15 can abut against the frame 14 to limit the moving contact 12 when the main shaft 11 drives the moving contact 12 away from the static contact 13. The frame 14 can include two side plates 141 fixed to the two sides of a back plate 142, and the main shaft 11 is arranged between the two side plates 141 and can rotate, and the moving contact 12 is fixed to the main shaft 11.
[0066] Optionally, the grounding switch further includes a spring 16 assembly, the spring 16 assembly includes a spring 16 and a spring holder for supporting the spring 16, and the blocking plate 15 is part of the spring holder. Figure 1 As shown, the spring holder includes two blocking plates 15, the two main shafts 11 are arranged in the blocking plates 15 and the blocking plates 15 are fixed to the main shafts 11. How the spring holder supports the spring 16 to apply power to the main shaft 11 is prior art and will not be repeated here. In this example, the structure of the spring holder is adjusted to limit the rotation angle of the main shaft 11, so as to avoid increasing the cost as much as possible.
[0067] The utility model also provides a switch cabinet, the switch cabinet includes the grounding switch with the buffer device of any preceding. The switch cabinet can be an air insulation switch cabinet.
[0068] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. Grounding switch with buffer means, said grounding switch having a main shaft (11), a moving contact (12) and a stationary contact (13), said moving contact (12) being fixed to said main shaft (11), said main shaft (11) being able to bring said moving contact (12) in contact or away from said stationary contact (13), said stationary contact (13) comprising: A base (131) and a static blade (132) fixed to the base (131), the base (131) is fixed to the support seat (5); The grounding switch further comprises a buffering device, the buffering device comprises: A support (2) fixed to the support seat (5); A buffering pad (3), the support (2) is used for supporting the buffering pad (3), the buffering pad (3) is located at a first end of the static blade (132), and the movable contact (12) can contact the static blade (132) from a second end of the static blade (132).
2. The grounding switch of claim 1, wherein, The support (2) comprises: An upper baffle (21) fixed to the support seat (5); A lower baffle (22) fixed to the upper baffle (21), the buffering pad (3) is located between the upper baffle (21) and the lower baffle (22), and the lower baffle (22) abuts against a first end of the static contact (13).
3. The grounding switch of claim 2, wherein, The number of the buffering pads (3) is multiple; and / or The upper baffle (21) is integrally formed with the support seat (5).
4. The grounding switch of claim 2, wherein, The upper baffle (21) and the lower baffle (22) are metal baffles.
5. The grounding switch of claim 2, wherein, The support (2) further comprises: Two fixing members (23) respectively penetrating through two ends of the upper baffle (21), the buffering pad (3) and the lower baffle (22); and / or At least one reinforcing rib (24) in a triangular shape, one side of the reinforcing rib (24) is fixed to the support seat (5), and the other side is fixed to the upper baffle (21).
6. The grounding switch of claim 1, wherein, The base (131) is a plate-shaped body, the static blade (132) is vertically arranged on the base (131), and the static blade (132) is integrally formed with the base (131).
7. The grounding switch according to any of claims 1-6, characterized in that, The grounding switch further comprises: A frame (14), the main shaft (11) is rotatably arranged on the frame (14); At least one blocking baffle (15) fixed to the main shaft (11) and having a first side (151) and a second side (152), in the case that the main shaft (11) drives the movable contact (12) to contact the static contact (13), the first side (151) of the blocking baffle (15) can abut against the frame (14) to limit the movable contact (12), and in the case that the main shaft (11) drives the movable contact (12) to move away from the static contact (13), the second side (152) of the blocking baffle (15) can abut against the frame (14) to limit the movable contact (12).
8. The grounding switch of claim 7, wherein, The first side (151) and the second side (152) are straight sides.
9. The grounding switch of claim 7, wherein, The grounding switch further comprises a spring (16) and a spring holder, the spring holder is used for supporting the spring (16), and the blocking baffle (15) is part of the spring holder.
10. Switchgear, characterized in that The grounding switch with the buffering device according to any one of claims 1-9.