Elastic arc contact device of high-voltage isolating switch
By designing an elastic adjustment mechanism in the high-voltage isolation switch to adjust the distance between the arc contacts, the arc burn problem caused by the arc contacts not being in contact with the active contacts is solved, and the effect of protecting the main contacts is achieved, which extends the replacement cycle and improves the power supply reliability.
Patent Information
- Application Number
- CN202421513643.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-06-28
AI Technical Summary
In the high-voltage isolating switch contact system, the arc contact does not come into contact with the active contact, resulting in the main static contact being burned by the arc.
A high-voltage isolation switch elastic arc contact device is designed, and an elastic adjustment mechanism is used to adjust the spacing between the arc contacts, so that the active contact first contacts are in contact with the arc contacts when closing. The arc contacts bear arc sparks and protect the main contacts.
By adjusting the contact end spacing of the arc contacts, we ensure that the active contact can smoothly enter the designated position when closing, avoid the main static contact being burned by arcs, extend the replacement cycle of dynamic and static contacts, save material and labor costs, and improve power supply reliability.
Smart Images
Figure CN222851317U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power switches, in particular to an elastic arc contact device for a high-voltage isolating switch. Background Art
[0002] The booster station of some power plants adopts double busbar wiring form and adopts GW27 horizontal rotary high-voltage AC disconnector. The contact system of the high-voltage disconnector includes a base, a main contact and an arc contact. The base and the arc contact are made of stainless steel. The main contact includes two main static contacts and an active contact rod. The two main static contacts are fixed on the base, and a gap for clamping the active contact is left between the two main static contacts. The two main static contacts are one up and one down. The main static contacts are made of copper and silver and are used to pass large currents. There are also two arc contacts. The two arc contacts are arranged on the base on one side of the two main static contacts. The two arc contacts are one up and one down. A gap for clamping the active contact is left between the two arc contacts, and the gap is smaller than the gap. The arc contact is plate-shaped. When closing the circuit, the active contact first contacts with the two arc contacts. After the circuit is closed, the two arc contacts are squeezed apart, and then the active contact directly contacts the main static contact. When closing the circuit, the arc contact replaces the main static contact to bear the arc spark. When the active contact contacts the main static contact, there is no voltage difference between the active contact and the main static contact, so no arc spark occurs. When opening the circuit, the active contact first separates from the main static contact, but at this time the active contact is connected to the main static contact through the arc contact and the base, so that no arc spark occurs between the active contact and the main static contact. If the circuit is opened, the active contact will separate from the arc contact, so that the arc contact bears the arc spark. The arc contact protects the main contact and prevents the main contact from being burned by the arc when opening and closing the circuit.
[0003] The arc contact is also called the arc-starting plate. The two arc-starting plates are fixed on the base. Affected by the precision of design and manufacturing, the distance between the two arc contacts may not meet the actual needs. For example, if the distance between the two arc contacts is too large, the arc-starting function will be lost and the effect of protecting the main contact will not be achieved. If the distance between the two arc contacts is too small, the main contact will not be able to close in place. Therefore, in the actual operation of the above-mentioned high-voltage disconnector contact system, there is a situation where the arc contact does not contact the active contact, which causes the main contact to be burned by the arc. Utility Model Content
[0004] The utility model aims to provide a high-voltage disconnector elastic arc contact device to solve the problem that the arc contact of the high-voltage disconnector contact system does not contact with the active contact, thereby causing the main static contact to be burned by the arc.
[0005] The utility model is realized by the following technical solutions:
[0006] A high-voltage disconnector elastic arc contact device comprises a base and two main static contacts and two arc contacts located on the base, the two arc contacts are located on one side of the two main static contacts, a gap is left between the two main static contacts, a spacing is left between the two arc contacts, one end of the two arc contacts are connected to the base, and the other end is a contact end for contacting with an active contact, a mounting plate is provided on the base on one side of the two main static contacts, the two arc contacts are connected to the mounting plate by a hinge, the two arc contacts are electrically connected to the main static contact through the mounting plate and the base, an elastic adjustment mechanism is provided between the two arc contacts, and the elastic adjustment mechanism is used to adjust the spacing between the contact ends of the two arc contacts.
[0007] Furthermore, the elastic adjustment mechanism includes a fixed block, a connecting rod, two springs and two adjusting nuts, the fixed block is arranged on a side plate surface of the mounting plate away from the contact end of the arc contact, the fixed block is provided with a through passage hole, the ends of the two arc contacts away from the contact end are provided with through adjustment holes, and the two adjustment holes extend along the length direction of the corresponding arc contacts, the outer wall of the connecting rod is provided with an external thread, one end of the connecting rod passes through the adjustment hole of any one arc contact, the passage hole of the fixed block and the adjustment hole of another arc contact in sequence, and is threadedly connected to an adjusting nut, the other end of the connecting rod is threadedly connected to another adjusting nut, and the two arc contacts are located between the two adjusting nuts, and a spring is sleeved on the connecting rod sections on both sides of the fixed block, one end of the two springs are tightly pressed against the fixed block, and the other end is tightly pressed against the arc contact on the corresponding side.
[0008] Furthermore, conductive tapes are connected between the two arc contacts and the fixing block.
[0009] Furthermore, the fixing block is connected to the mounting plate via bolts, and the mounting plate is connected to the base via bolts.
[0010] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0011] In the utility model, maintenance personnel can regularly check whether the distance between the two arc contacts meets the requirements of the opening and closing of the active contacts. When it is found that the distance between the contact ends of the two arc contacts is too large or too small, the distance between the two arc contacts can be adjusted by an elastic adjustment mechanism, so that the active contact can first contact the arc contact when closing, so that the arc contact can bear the arc spark, and the active contact can smoothly cut into the designated position between the two main static contacts, thereby achieving the closing standard. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model.
[0013] In the attached picture:
[0014] Figure 1 It is a structural schematic diagram of the utility model;
[0015] Figure 2 For the utility model Figure 1 Enlarged view of part A in the middle;
[0016] Figure 3 This is a structural diagram of the arc contact of the utility model.
[0017] Marks and corresponding parts names in the attached drawings:
[0018] 1. Base; 2. Main static contact; 3. Arc contact; 4. Mounting plate; 5. Fixed block; 6. Connecting rod; 7. Spring; 8. Adjusting nut; 9. Pass hole; 10. Adjusting hole; 11. Conductive tape. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with the embodiments and drawings. The schematic implementation mode and description of the utility model are only used to explain the utility model and are not intended to limit the utility model. It should be noted that the utility model is already in the actual development and use stage.
[0020] Example 1
[0021] A high voltage disconnector elastic arc contact device, referring to Figure 1 , Figure 2 , including a base 1 and two main static contacts 2 and two arc contacts 3 located on the base 1, the two arc contacts 3 are located on one side of the two main static contacts 2, a gap is left between the two main static contacts 2, a spacing is left between the two arc contacts 3, and one end of the two arc contacts 3 is connected to the base 1, and the other end is a contact end for contacting with the active contact, a mounting plate 4 is provided on the base 1 on one side of the two main static contacts 2, the two arc contacts 3 are connected to the mounting plate 4 through a hinge, the two arc contacts 3 are electrically connected with the main static contacts 2 through the mounting plate 4 and the base 1, and an elastic adjustment mechanism is provided between the two arc contacts 3, and the elastic adjustment mechanism is used to adjust the spacing between the contact ends of the two arc contacts 3.
[0022] In this solution, maintenance personnel can regularly check whether the distance between the two arc contacts 3 meets the requirements of the active contact opening and closing. When it is found that the distance between the contact ends of the two arc contacts 3 is too large or too small, the distance between the two arc contacts 3 can be adjusted by an elastic adjustment mechanism, so that the active contact can first contact the arc contact 3 when closing, so that the arc contact 3 can withstand the arc spark, and the active contact can smoothly cut into the designated position between the two main static contacts 2, thereby achieving the closing standard.
[0023] Example 2
[0024] Based on Example 1, in this example, reference Figure 1 , Figure 2 , combined with Figure 3 The elastic adjustment mechanism includes a fixed block 5, a connecting rod 6, two springs 7 and two adjustment nuts 8. The fixed block 5 is arranged on a side plate surface of the mounting plate 4 away from the contact end of the arc contact 3. A through passage hole 9 is provided on the fixed block 5. The ends of the two arc contacts 3 away from the contact end are provided with through adjustment holes 10, and the two adjustment holes 10 extend along the length direction of the corresponding arc contacts 3. The outer wall of the connecting rod 6 is provided with an external thread. One end of the connecting rod 6 passes through the adjustment hole 10 of any arc contact 3, the through hole 9 of the fixed block 5 and the adjustment hole 10 of another arc contact 3 in sequence, and then is threadedly connected with an adjustment nut 8. The other end of the connecting rod 6 is threadedly connected with another adjustment nut 8, and the two arc contacts 3 are located between the two adjustment nuts 8. A spring 7 is sleeved on the rod sections of the connecting rod 6 on both sides of the fixed block 5. One end of the two springs 7 is tightly pressed against the fixed block 5, and the other end is tightly pressed against the arc contact 3 on the corresponding side. It should be noted that the mounting plate 4 and the fixing block 5 are made of stainless steel for easy conduction.
[0025] In this solution, when any one of the adjusting nuts 8 is rotated, when the distance between the two adjusting nuts 8 is increased, the two springs 7 will push the ends of the two arc contacts 3 away from each other. Since the two arc contacts 3 are rotatably set on the mounting plate 4, the distance between the contact ends of the two arc contacts 3 can be reduced, which can facilitate the active contact to contact the arc contact 3 first, and then the arc contact 3 can be struck; when the distance between the two adjusting nuts 8 is reduced, since the two arc contacts 3 are rotatably set on the mounting plate 4, the distance between the contact ends of the two arc contacts 3 can be increased, which can facilitate the active contact to be smoothly closed to the specified position. By adjusting the distance between the contact ends of the two arc contacts 3, the active contact can first contact the arc contact 3 when closing the switch, and can also close the switch to the specified position; it is convenient to avoid the occurrence of arc burns on the main contacts of the disconnector, extend the replacement cycle of the moving and static contacts, save the material cost and labor cost caused by replacing the contacts, and help improve the power supply reliability.
[0026] Example 3
[0027] Based on Example 1, in this example, reference Figure 1 , Figure 2 Conductive strips 11 are connected between the two arc contacts 3 and the fixed block 5. One end of the two conductive strips 11 is tightly connected to the arc contact 3 by bolts, and the other end is tightly connected to the fixed block 5 by bolts, so that the two arc contacts 3 are electrically connected with the main static contact 2 through the conductive strips 11, the fixed block 5, the base 1, and the main static contact 2. When the active contact contacts the arc contact 3 when the switch is closed, the arc contact 3 is subjected to the arc spark. When the active contact further contacts the main static contact 2, no spark will be generated on the main static contact 2, thereby burning the main static contact 2.
[0028] Example 4
[0029] Based on Example 2, in this example, refer to Figure 1 , Figure 2 The fixing block 5 is connected to the mounting plate 4 by bolts, and the mounting plate 4 is connected to the base 1 by bolts. In this solution, the fixing block 5 is first fixed to the mounting plate 4 by bolts, and then the mounting plate 4 is installed on the base 1 by bolts, which improves the convenience of installing the arc contact 3 device.
[0030] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A high-voltage disconnector elastic arc contact device, comprising a base (1), two main static contacts (2) and two arc contacts (3) located on the base (1), the two arc contacts (3) being located on one side of the two main static contacts (2), a gap being left between the two main static contacts (2), a spacing being left between the two arc contacts (3), and one end of the two arc contacts (3) being connected to the base (1) and the other end being a contact end for contacting with an active contact, characterized in that: A mounting plate (4) is provided on the base (1) on one side of the two main static contacts (2); the two arc contacts (3) are connected to the mounting plate (4) via a hinge; the two arc contacts (3) are electrically connected to the main static contacts (2) via the mounting plate (4) and the base (1); an elastic adjustment mechanism is provided between the two arc contacts (3); the elastic adjustment mechanism is used to adjust the distance between the contact ends of the two arc contacts (3).
2. A high voltage disconnector elastic arc contact device according to claim 1, characterized in that: The elastic adjustment mechanism comprises a fixing block (5), a connecting rod (6), two springs (7) and two adjustment nuts (8); the fixing block (5) is arranged on a side plate surface of the mounting plate (4) away from the contact end of the arc contact (3); a through hole (9) is provided on the fixing block (5); a through adjustment hole (10) is provided at one end of the two arc contacts (3) away from the contact end, and the two adjustment holes (10) extend along the length direction of the corresponding arc contact (3); an external thread is provided on the outer wall of the connecting rod (6); one end of the connecting rod (6) passes through any The adjusting hole (10) of one arc contact (3), the passing hole (9) of the fixing block (5) and the adjusting hole (10) of the other arc contact (3) are threadedly connected to an adjusting nut (8), the other end of the connecting rod (6) is threadedly connected to the other adjusting nut (8), and the two arc contacts (3) are located between the two adjusting nuts (8), and a spring (7) is sleeved on the connecting rod (6) sections on both sides of the fixing block (5), and one end of the two springs (7) is tightly pressed against the fixing block (5), and the other end is tightly pressed against the arc contact (3) on the corresponding side.
3. The elastic arc contact device of a high-voltage disconnector according to claim 1, characterized in that: Conductive strips (11) are connected between the two arc contacts (3) and the fixed block (5).
4. A high voltage disconnector elastic arc contact device according to claim 2, characterized in that: The fixing block (5) is connected to the mounting plate (4) via bolts, and the mounting plate (4) is connected to the base (1) via bolts.