Isolating switch with equipotential arc striking contact
By designing an isolating switch with equipotential arcing contacts, the coordination of the rotating arm and equipotential arcing contacts is used to solve the problem of long-lasting arcing of the traditional isolating switch, and the safe closing and disconnection control of the circuit is achieved.
Patent Information
- Application Number
- CN202422178445.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-05
AI Technical Summary
Traditional isolation switches are prone to arcing when the circuit is opened and closed, and the arcing is longer due to the potential difference, so the existing arc extinguishing structure design is not effective enough.
An isolating switch with equipotential arc-induced contacts is designed, including a first static contact, a second static contact, a rotating arm, an equipotential arc-induced contact and an arc extinguishing chamber. Through the coordination of the rotating arm and an equipotential arc-induced contact, the arc is guided and eliminated in the arc extinguishing chamber, while the working circuit and the power supply circuit maintain equipotential.
It realizes effective removal of arcs when the circuit is opened and closed, avoids the generation of additional arcs and ensures safe closing and disconnection of the circuit.
Smart Images
Figure CN223140659U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the fields of electrical components and power system protection, in particular to a disconnector with an equipotential arcing contact. Background Art
[0002] An arc is a discharge phenomenon in which, when current passes through some insulating media (such as air), due to a sufficiently large electric field strength, gas molecules are ionized to form a plasma, and then a path is formed between the electrodes.
[0003] A disconnector is a switching device mainly used for isolating power sources, switching operations, connecting and disconnecting small-current circuits, but traditionally it does not have an arc extinguishing function.
[0004] An arc extinguishing device is an important part of a disconnector, which is used to quickly extinguish the possible arcs generated when the circuit is disconnected to protect the safety of equipment and personnel.
[0005] In the prior art, due to its compact design, the arc extinguishing structure enables the arc to stay inside for a long time. At the same time, due to the potential difference in the circuit, more and longer arcs will be generated. Therefore, we provide a disconnector with an equipotential arcing contact. Summary of the Utility Model
[0006] The technical problem to be solved by the utility model is how to effectively guide the circuit and extinguish the arc in the arc extinguishing chamber when arcs are generated during circuit opening and closing, and at the same time enable the working circuit and the power supply circuit to have equal potentials when conducting, so as to avoid generating more arcs. A disconnector with an equipotential arcing contact is provided.
[0007] The technical solution adopted by the utility model to solve its technical problems is as follows:[[]]
[0008] A disconnector with an equipotential arcing contact includes: a first static contact, a second static contact, a rotating arm, an equipotential arcing contact, and an arc extinguishing chamber.
[0009] The first static contact is fixedly arranged.
[0010] The second static contact is fixedly arranged directly above the first static contact.
[0011] The equipotential arcing contact is fixedly arranged directly above the second static contact and is electrically connected to the second static contact through a conductive sheet.
[0012] The lower end of the rotating arm is rotatably connected to the first static contact, its rotation axis is horizontally arranged, the lower end of the rotating arm is electrically connected to the first static contact, the upper part is electrically connected to the second static contact and the equipotential arcing contact, and an operating mechanism is connected to the middle of the rotating arm.
[0013] The arc extinguishing chamber is arranged directly above the equipotential arcing contact and the rotating arm.
[0014] When the user wants to change the state of the circuit to conducting, the user first connects the power circuit to the second stationary contact and the working circuit to the first stationary contact. When the user rotates the rotating arm through the operating mechanism so that the rotating arm contacts the equipotential arcing contact and the first stationary contact and the second stationary contact are in contact through the rotating arm, at this time the working circuit will be connected and conducted to the power circuit on the first stationary contact and the second stationary contact. At this time, the working circuit can be conducted to the power circuit, and the potential of the working circuit and the power circuit will be equal. At the same time, when the rotating arm contacts the equipotential arcing contact, an arc will be generated on the rotating arm and the equipotential arcing contact, and the generated arc will be guided and attracted by the arc extinguishing chamber and move into the arc extinguishing chamber to extinguish the generated arc, thereby realizing the safe closing control of the circuit.
[0015] When the user wants to change the state of the circuit to open, the user can rotate the rotating arm through the operating mechanism so that the rotating arm can be separated from the equipotential arcing contact, and at the same time the first stationary contact cannot be connected and conducted to the second stationary contact through the rotating arm, thereby disconnecting the working circuit from the power circuit. When the working circuit and the power circuit are disconnected, an arc will be generated on the rotating arm and the equipotential arcing contact at this time, and the arc extinguishing chamber will guide and attract the arc on the rotating arm and the equipotential arcing contact until it is completely extinguished by the arc extinguishing chamber. Thereby realizing the safe opening control of the circuit.
[0016] With such a function realized, when an arc is generated during the opening and closing of the circuit, the arc extinguishing chamber can effectively guide the circuit and extinguish the arc, and at the same time can also make the potential of the working circuit and the power circuit equal when they are conducting, thereby avoiding the technical effect of generating more arcs.
[0017] Furthermore, the rotating arm includes: a plurality of conductive grid plates, a moving contact knife, a knife protection housing, a baffle plate, and a moving contact piece.
[0018] The knife protection housing is made of a conductive material, its lower part is rotatably connected to the first stationary contact and is electrically connected to the first stationary contact, its rotation axis is horizontally arranged, and the middle part of the knife protection housing is connected to the operating mechanism.
[0019] A plurality of conductive grid plates are fixedly arranged on the upper part of the knife protection housing.
[0020] The moving contact knife is fixedly arranged on the upper part of the knife protection housing and is located between a plurality of conductive grid plates, at the upper end of the moving contact knife.
[0021] The moving contact piece is fixed on the upper part of the moving contact knife and contacts the equipotential arcing contact.
[0022] A number of moving contacts are fixed on the surfaces of a number of conductive grid plates and moving contact blades, and are in contact with the second static contact.
[0023] A baffle is arranged between the first static contact and the second static contact, and the baffle is fixedly connected to the knife gate protection housing.
[0024] When the user wants to close and conduct the circuit, at this time, the user can rotate the knife gate protection housing through the operating mechanism. When the knife gate protection housing rotates, it can drive a number of conductive grid plates inside to rotate together with the moving contact blade, so that the moving contact blade can contact the equipotential arcing contact through the moving contact piece, and at the same time, a number of conductive grid plates can contact the second static contact through the moving contact piece, so as to make the second static contact conduct with the first static contact through the knife gate protection housing and a number of conductive grid plates, so that the working circuit can be closed and conducted with the power supply circuit, and the potential of the working circuit can be equal to that of the power supply circuit.
[0025] When the user wants to open and disconnect the circuit, the user can rotate the knife gate protection housing through the operating mechanism, so that when the knife gate protection housing rotates, it can drive a number of conductive grid plates inside to rotate together with the moving contact blade, so that the moving contact blade can separate from the equipotential arcing contact through the moving contact piece, and a number of conductive grid plates and the moving contact piece can separate from the second static contact, so as to make the first static contact unable to contact the second static contact through the knife gate protection housing and a number of conductive grid plates, so as to disconnect the working circuit from the power supply circuit.
[0026] Furthermore, the moving contact piece is fixedly connected to the upper part of the moving contact blade by a mortise and tenon structure and is also fixedly connected by bolts.
[0027] By adopting the mortise and tenon structure, the moving contact piece and the moving contact blade can be better fixed together.
[0028] Furthermore, the moving contact piece is cross-shaped, the left arm is integrally connected to the upper arm and is in contact with the equipotential arcing contact, and the right arm and the lower arm of the moving contact piece are fixedly connected to the moving contact blade through a raised block.
[0029] By setting the moving contact piece to be cross-shaped, the protrusion on the upper arm of the moving contact piece can better guide the arc, so as to elongate the arc, so that the upper arc extinguishing chamber can guide and extinguish the elongated arc.
[0030] Furthermore, the equipotential arcing contact is a vertical strip shape, its lower part is in contact with the moving contact piece, and its upper part bends inward.
[0031] When the lower part of the equipotential arcing contact touches the moving contact piece to generate an arc, the area bent inward at the upper part will guide the arc, so that the arc can be guided by the equipotential arcing contact to the upper arc extinguishing chamber above, so that the upper arc extinguishing chamber can better attract and extinguish the arc.
[0032] Furthermore, the first static contact and the second static contact are fixed by bolts.
[0033] By setting the first static contact and the second static contact, it can help users better fix the device on other devices and connect it to the circuit.
[0034] Advantages of the utility model:
[0035] 1. Through the mutual cooperation and support among the first static contact, the second static contact, the rotating arm, the equipotential arcing contact, and the arc extinguishing chamber of the utility model. When the user wants to change the state of the circuit to conducting, by operating the rotating arm, the rotating arm is brought into contact with the equipotential arcing contact, and the first static contact and the second static contact are brought into contact through the rotating arm. At this time, the working circuit will be connected and conducted to the power supply circuit on the first static contact and the second static contact, making the working circuit and the power supply circuit conduct, and making the potentials of the working circuit and the power supply circuit equal. At the same time, when the rotating arm is in contact with the equipotential arcing contact, an arc will be generated on the rotating arm and the equipotential arcing contact, and the generated arc will be guided and attracted by the arc extinguishing chamber and move into the arc extinguishing chamber to extinguish the generated arc, thereby realizing the safe closing control of the circuit.
[0036] When the user wants to change the state of the circuit to disconnected, the user can rotate the rotating arm to separate the rotating arm from the equipotential arcing contact, and at the same time make the first static contact unable to be connected and conducted to the second static contact through the rotating arm, so as to disconnect the working circuit from the power supply circuit. When the working circuit and the power supply circuit are disconnected, an arc will be generated on the rotating arm and the equipotential arcing contact at this time, and the arc extinguishing chamber will guide and attract the arc on the rotating arm and the equipotential arcing contact until it is completely extinguished by the arc extinguishing chamber. In this way, the safe disconnection control of the circuit is realized.
[0037] With such a function, when an arc is generated during the opening and closing of the circuit, the arc extinguishing chamber can effectively guide the circuit and extinguish the arc, and at the same time can make the potentials of the working circuit and the power supply circuit equal when conducting, so as to avoid the technical effect of generating more arcs. Description of the drawings
[0038] Figure 1 is a schematic diagram of the utility model;
[0039] Figure 2 is a side cross-sectional view of the utility model;
[0040] Figure 3 is a schematic cross-sectional view of the present utility model.
[0041] Description of reference numerals: 1, first static contact; 2, second static contact; 3, equipotential arcing contact; 4, conductive grid; 5, moving contact blade; 6, blade protection housing; 7, baffle; 8, moving contact piece. Specific embodiments
[0042] The concept and technical effects of the present utility model will be clearly and completely described below in conjunction with embodiments to fully understand the purpose, features and effects of the present utility model.
[0043] Please refer to Figures 1 - 3 : Isolating switch with equipotential arcing contact, comprising: first static contact 1, second static contact 2, rotating arm, equipotential arcing contact 3, arc extinguishing chamber.
[0044] The first static contact 1 is fixedly arranged.
[0045] The second static contact 2 is fixedly arranged directly above the first static contact 1.
[0046] The equipotential arcing contact 3 is fixedly arranged directly above the second static contact 2 and is electrically connected to the second static contact 2 through a conductive sheet.
[0047] The lower end of the rotating arm is rotatably connected to the first static contact 1, its rotation axis is horizontally arranged, the lower end of the rotating arm is electrically connected to the first static contact 1, the upper part is electrically connected to the second static contact 2 and the equipotential arcing contact 3, and an operating mechanism is connected to the middle of the rotating arm.
[0048] The arc extinguishing chamber is arranged directly above the equipotential arcing contact 3 and the rotating arm.
[0049] When the user wants to control the closing of the working circuit and the power circuit, the user first connects the power circuit to the second static contact 2 and connects the working circuit to the first static contact 1, and then the user controls the rotation of the rotating arm through the operating mechanism until the rotating arm contacts the equipotential arcing contact 3. At this time, the working circuit will be connected and conducted with the power circuit on the second static contact 2 through the first static contact 1 and the rotating arm. At the same time, an arc will be generated between the rotating arm and the equipotential arcing contact 3 and between the rotating arm and the second static contact. The generated arc will be guided and attracted by the arc extinguishing chamber and move into the arc extinguishing chamber to extinguish the generated arc, thereby realizing the safe closing control of the circuit.
[0050] When the user wants to open the circuit breaker between the working circuit and the power supply circuit, the user can rotate the rotating arm through the operating mechanism, so that the rotating arm can be separated from the equipotential arcing contact 3, and at the same time, the rotating arm can be separated from the second static contact 2 and the equipotential arcing contact, so as to disconnect the working circuit from the power supply circuit. At the same time, an arc will be generated between the rotating arm and the equipotential arcing contact 3 and between the rotating arm and the second static contact, and the arc extinguishing chamber will guide and attract the arc on the rotating arm and the equipotential arcing contact 3 until the arc is completely extinguished by the arc extinguishing chamber. In this way, the safe disconnection control of the circuit is realized.
[0051] Since the second static contact is equipotential with the equipotential arcing contact, the arc generated between the rotating arm and the second static contact will move upward, so that the equipotential arcing contact can elongate the arc, thereby improving the arc extinguishing efficiency.
[0052] The rotating arm includes: a plurality of conductive grid sheets 4, a moving contact blade 5, a blade protection housing 6, a baffle 7, and a moving contact piece 8.
[0053] The blade protection housing 6 is made of conductive material, its lower part is rotatably connected to the first static contact 1 and is electrically connected to the first static contact 1, its rotation axis is horizontally arranged, and the middle part of the blade protection housing 6 is connected to the operating mechanism.
[0054] A plurality of conductive grid sheets 4 are fixedly arranged on the upper part of the blade protection housing 6.
[0055] The moving contact blade 5 is fixedly arranged on the upper part of the blade protection housing 6 and is located between a plurality of conductive grid sheets 4, at the upper end of the moving contact blade 5.
[0056] The moving contact piece 8 is fixed on the upper part of the moving contact blade 5 and is in contact with the equipotential arcing contact 3.
[0057] A plurality of moving contacts are fixed on the surfaces of a plurality of conductive grid sheets 4 and the moving contact blade 5 and are in contact with the second static contact 2.
[0058] The baffle 7 is arranged between the first static contact 1 and the second static contact 2, and the baffle 7 is fixedly connected to the blade protection housing 6.
[0059] When the user wants to control the closing of the circuit breaker between the working circuit and the power supply circuit, the user can control the rotation of the blade protection housing 6 through the operating mechanism. The rotation of the blade protection housing 6 can drive a plurality of conductive grid sheets 4, a plurality of moving contacts, the moving contact piece, the baffle and the moving contact blade 5 to rotate together until the moving contact piece 8 is in contact with the equipotential arcing contact 3 and a plurality of moving contacts are in contact with the second static contact, so that the working circuit can be closed and conducted with the power supply circuit.
[0060] When the user wants to switch off the working circuit from the power supply circuit, the user operates the operating mechanism again to control the reverse rotation of the knife gate protection housing 6. The reverse rotation of the knife gate protection housing 6 can drive a plurality of conductive grid pieces 4, a plurality of moving contacts, moving contact pieces, a blocking plate and the moving knife gate 5 to rotate in the reverse direction by a certain angle, so that the moving contact piece 8 is separated from the equipotential arc ignition contact 3, and a plurality of moving contacts are separated from the second static contact, so that the working circuit can be switched off from the power supply circuit.
[0061] The moving contact piece 8 is fixedly connected to the upper part of the moving knife gate 5 by a mortise and tenon structure and is also fixedly connected by bolts.
[0062] By adopting the mortise and tenon structure, the moving contact piece 8 and the moving knife gate 5 can be better fixed together.
[0063] The moving contact piece 8 is in a cross shape, and the left arm and the upper arm are integrally connected and are in contact with the equipotential arc ignition contact 3. The right arm and the lower arm of the moving contact piece 8 are fixedly connected to the moving knife gate 5.
[0064] By setting the moving contact piece 8 in a cross shape, the convex part of the upper arm of the moving contact piece 8 can better guide the arc, so as to elongate the arc, so that the upper arc extinguishing chamber can guide and extinguish the elongated arc.
[0065] The equipotential arc ignition contact 3 is in a vertical strip shape, its lower part is in contact with the moving contact piece 8, and its upper part bends inward.
[0066] When an arc is generated when the lower part of the equipotential arc ignition contact 3 is in contact with the moving contact piece 8, the area where the upper part bends inward at this time will guide the arc, so that the arc can be guided by the equipotential arc ignition contact 3 into the upper arc extinguishing chamber, so that the arc extinguishing chamber can better attract and extinguish the arc.
[0067] The first static contact 1 and the second static contact 2 are fixed by bolts.
[0068] By setting the first static contact 1 and the second static contact 2, it can help the user better fix the device on other devices and connect it to the circuit.
[0069] Working process:
[0070] When the user wants to close and conduct the circuit, the user can rotate the knife switch protection housing 6 through the operating mechanism. When the knife switch protection housing 6 rotates, it can drive a number of internal conductive grid plates 4 and the moving contact knife switch 5 to rotate together, so that the moving contact knife switch 5 can contact the equipotential arcing contact 3 through the moving contact piece 8, and at the same time make a number of conductive grid plates 4 contact the second static contact 2, so that the second static contact 2 can be conducted with the first static contact 1 through the knife switch protection housing 6 and a number of conductive grid plates 4, so that the working circuit can be closed and conducted with the power supply circuit, and the potential of the working circuit can be equal to that of the power supply circuit. At the same time, when the working circuit is conducted with the power supply circuit, an arc will be generated on the moving contact piece 8 and the equipotential arcing contact 3 at this time, and the generated arc will be guided and attracted by the arc extinguishing chamber and move into the arc extinguishing chamber to extinguish the generated arc, thereby realizing the safe closing control of the circuit.
[0071] When the user wants to open and disconnect the circuit, the user can rotate the knife switch protection housing 6 through the operating mechanism, so that when the knife switch protection housing 6 rotates, it can drive a number of internal conductive grid plates 4 and the moving contact knife switch 5 to rotate together, so that the moving contact knife switch 5 separates from the equipotential arcing contact 3 through the moving contact piece 8, and a number of conductive grid plates 4 separate from the second static contact 2, so that the first static contact 1 cannot contact the second static contact 2 through the knife switch protection housing 6 and a number of conductive grid plates 4, so that the working circuit is disconnected from the power supply circuit. When the working circuit is disconnected from the power supply circuit, an arc will be generated on the moving contact piece 8 and the equipotential arcing contact 3 at this time, and the arc extinguishing chamber will guide and attract the arc on the rotating arm and the equipotential arcing contact 3 until it is completely extinguished by the arc extinguishing chamber. Thereby realizing the safe disconnection control of the circuit.
[0072] The above embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts all belong to the scope of protection of the present invention.
Claims
1. Isolated switch with an equipotential arc ignition contact, characterized in that, Comprising: A first static contact (1), a second static contact (2), a rotating arm, an equipotential arcing contact (3), and an arc extinguishing chamber; The first static contact (1) is fixedly arranged; The second static contact (2) is fixedly arranged directly above the first static contact (1); The equipotential arcing contact (3) is fixedly arranged directly above the second static contact (2) and is electrically connected to the second static contact (2) through a conductive sheet; The lower end of the rotating arm is rotatably connected to the first static contact (1), its rotation axis is horizontally arranged, the lower end of the rotating arm is electrically connected to the first static contact (1), the upper part is electrically connected to the second static contact (2) and the equipotential arcing contact (3), and an operating mechanism is connected to the middle of the rotating arm; The arc extinguishing chamber is arranged directly above the equipotential arcing contact (3) and the rotating arm.
2. The isolating switch with an equipotential arc ignition contact according to claim 1, characterized in that: The rotating arm includes: a plurality of conductive grid sheets (4), a moving contact blade (5), a blade protection housing (6), a blocking plate (7), and a moving contact piece (8); The blade protection housing (6) is made of a conductive material, its lower part is rotatably connected to the first static contact (1) and is electrically connected to the first static contact (1), its rotation axis is horizontally arranged, and the middle of the blade protection housing (6) is connected to the operating mechanism; A plurality of the conductive grid sheets (4) are fixedly arranged on the upper part of the blade protection housing (6); The moving contact blade (5) is fixedly arranged on the upper part of the blade protection housing (6) and is located between a plurality of the conductive grid sheets (4), and the upper end of the moving contact blade (5); The moving contact piece (8) is fixed on the upper part of the moving contact blade (5) and contacts the equipotential arcing contact (3); A plurality of moving contacts are fixed on the surfaces of a plurality of the conductive grid sheets (4) and the moving contact blade (5) and contact the second static contact (2); The blocking plate (7) is arranged between the first static contact (1) and the second static contact (2), and the blocking plate (7) is fixedly connected to the blade protection housing (6).
3. The isolating switch with an equipotential arcing contact according to claim 2, characterized in that: The moving contact piece (8) is fixedly connected to the upper part of the moving contact blade (5) by a mortise and tenon structure and is also fixedly connected by bolts.
4. The isolating switch with an equipotential arcing contact according to claim 2, characterized in that: The moving contact piece (8) is cross-shaped, and the left arm and the upper arm are integrally connected and contact the equipotential arcing contact (3), and the right arm and the lower arm of the moving contact piece (8) are fixedly connected to the moving contact blade (5) through a raised block.
5. The isolating switch with an equipotential arc ignition contact according to claim 3, characterized in that: The equipotential arcing contact (3) is vertically strip-shaped, its lower part contacts the moving contact piece (8), and its upper part bends inward.
6. The isolating switch with an equipotential arc ignition contact according to claim 3, characterized in that: The first static contact (1) and the second static contact (2) are fixed by bolts.