Isolation power switch capable of reducing electric arc
By adding auxiliary contact pieces and spring structures to the isolating power switch, the problem of arcing when the moving and stationary contacts separate is solved, thereby reducing the arc and ensuring stable operation of the switch.
Patent Information
- Application Number
- CN202520284110.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-21
AI Technical Summary
Existing isolating power switches are prone to arcing when the moving and stationary contacts separate, which can cause contact piece erosion, affecting safety and service life.
Adding an auxiliary contact piece to the isolating power switch allows the moving and stationary contacts to remain in contact during the initial separation phase through the elastic action of the spring. Once the handle is rotated to a certain angle, the auxiliary contact piece quickly separates, reducing the generation of electric arcs.
It effectively reduces arc generation, protects moving and stationary contacts, ensures stable switch performance, and extends service life.
Smart Images
Figure CN223871386U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power switch equipment technology, and in particular to an isolated power switch that can reduce electric arc. Background Technology
[0002] An isolating switch is a switching device without arc-extinguishing function. In the application of isolating switches, operators operate the handle in either the forward or reverse direction to complete the opening and closing of the circuit.
[0003] Although existing isolating power switches meet control requirements to some extent, they still have the following technical problems due to structural limitations. Specifically, they lack arc-extinguishing functionality. Whether the power is disconnected manually or electrically by the operator, the separation speed of the multiple moving contacts and multiple stationary contacts connected to the handle is limited. This means that an electric arc can easily be generated at the moment of separation between the moving and stationary contacts. The arc temperature is extremely high, posing a chance of arc erosion of the moving and stationary contacts. Consequently, arc erosion prevents the moving and stationary contacts from effectively closing and separating, adversely affecting safe power supply control and even rendering the isolating power switch unusable. Therefore, it is particularly necessary to provide an isolating power switch that reduces arc erosion of the moving and stationary contacts. Utility Model Content
[0004] To overcome the shortcomings of existing isolating power switches due to structural limitations, as described in the background art, this utility model provides an isolating power switch that, under the combined action of related mechanisms, initially separates the moving contact piece when the operator operates the handle, while the auxiliary contact piece and the stationary contact piece remain in contact. After the handle is rotated to a certain angle, the auxiliary contact piece and the stationary contact piece quickly separate. Because the separation speed of the auxiliary contact piece and the stationary contact piece is fast, the probability of arcing is reduced, thus providing good protection for the auxiliary contact piece, the moving contact piece, and the stationary contact piece, and reducing arcing.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] An arc-reducing isolating power switch includes a base plate, handle, outer protective shell, isolation plate, support base, connecting rod, fixed arm, shaft, and opening / closing mechanism. Multiple sets of the opening / closing mechanism and isolation plates are included. Each set includes a moving contact plate, a stationary contact plate, an auxiliary contact plate, a spring, and a connecting arm. The lower end of the connecting arm and the rear middle of the moving contact plate are fixedly installed together. The lower rear end of the auxiliary contact plate is rotatably installed on the front middle of the moving contact plate. Hook seats are fixedly installed on the middle of the auxiliary contact plate and the middle of the moving contact plate, respectively. The upper and lower ends of the spring are rotatably hooked onto the outside of the hook seats of the auxiliary contact plate and the moving contact plate, respectively. Multiple isolation plates are longitudinally fixedly installed on the base plate at left-right intervals at their lower ends. A terminal block is fixedly installed on the lower front end of the stationary contact plate. The lower parts of the terminal blocks of the stationary contact plates of the multiple opening / closing mechanisms are longitudinally fixedly installed on the front end of the base plate at left-right intervals at their lower ends. The device comprises at least two support seats, two fixed arms, and two shafts. Each support seat has a shaft hole at its upper end. The outer ends of the two shafts are rotatably fitted into the shaft holes of the two support seats. The lower ends of the two fixed arms are fixedly installed on the inner ends of the two shafts. The lower ends of the two support seats are fixedly installed on both sides of the rear end of the base plate. The lower ends of the moving contact plates of the multiple sets of opening and closing mechanisms are rotatably installed on a wire inlet seat. The lower parts of the wire inlet seats of the moving contact plates of the multiple sets of opening and closing mechanisms are fixedly installed longitudinally at a distance from left to right on the rear end of the base plate. The upper ends of the connecting arms of the multiple sets of opening and closing mechanisms each have shaft holes. The connecting rods are rotatably fitted into the shaft holes of the connecting arms of the multiple sets of opening and closing mechanisms. The left and right sides of the connecting rods are fixedly installed together with the inner sides of the upper ends of the two fixed arms. The lower end of the outer protective shell is fixedly installed on the upper end of the base plate. One side of the protective shell has an opening. One side of the shaft is located outside the protective shell through the opening. The rear end of the handle is fixedly installed on the outer side of the shaft.
[0007] Furthermore, the moving contact plates and stationary contact plates of the multiple sets of opening and closing mechanisms are respectively aligned in a straight line in the front and rear longitudinal directions, and the left and right thicknesses of the moving contact plates and auxiliary contact plates are consistent.
[0008] Furthermore, the lower rear end of the auxiliary contact piece has a bevel, and the lower rear end of the auxiliary contact piece is spaced a certain distance from the front side of the moving contact piece.
[0009] Furthermore, the spacing between the inner sides of the upper ends of the stationary contact pieces is greater than the left and right widths of the auxiliary contact pieces and the moving contact pieces, and the spacing between the inner sides of the lower ends of the stationary contact pieces is less than the left and right widths of the auxiliary contact pieces and the moving contact pieces.
[0010] Furthermore, the moving contact piece, stationary contact piece, auxiliary contact piece, spring, hook seat, outlet seat, and inlet seat are all made of metal.
[0011] Compared with existing technologies, the advantages of this utility model are as follows: This utility model adds an auxiliary contact piece to the existing moving contact piece of the opening and closing power switch. When the operator operates the handle to control the engagement of the moving and stationary contact pieces, under the tension of the spring, the moving and auxiliary contact pieces can simultaneously engage within the stationary contact piece to deliver power. Initially, when the handle separates the moving contact piece, the auxiliary and stationary contact pieces remain in contact due to the elastic relaxation of the spring. At the moment the handle is rotated to a certain angle and the auxiliary and stationary contact pieces separate, the spring tension is rapidly released, allowing the auxiliary and stationary contact pieces to quickly separate. Because of the rapid separation speed, the probability of arcing is reduced, providing good protection for the auxiliary, moving, and stationary contact pieces. In summary, this utility model has good application prospects. Attached Figure Description
[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0014] Figure 2 This is a schematic diagram of the planar structure of the static contact piece and the moving contact piece of this utility model in their separated states.
[0015] Figure 3 This is a schematic diagram of the planar structure of the static contact piece and the moving contact piece of this utility model in the combined state.
[0016] Figure 4 This is a schematic diagram of the planar structure of the stationary contact piece and the auxiliary contact piece in contact state of this utility model. Detailed Implementation
[0017] Figure 1 , 2As shown in Figures 3 and 4, the arc-reducing isolation power switch includes a base plate 1, a handle (not shown in the figure), an outer protective shell (not shown in the figure), an isolation plate 2, a support base 3, a connecting rod 4, a fixed arm 5, a shaft 7, and a closing / opening mechanism. There are three sets of closing / opening mechanisms and four isolation plates 2. Each set of closing / opening mechanisms includes a moving contact piece 61, a stationary contact piece 62, an auxiliary contact piece 63, a spring 64, and a connecting arm 65. The lower end of the connecting arm 65 has a "Π" shaped structure. The lower end of the connecting arm 65 and the rear middle of the moving contact piece 61 are fixedly installed together. The rear lower end of the auxiliary contact piece 63 is rotatably installed at the front middle of the moving contact piece at the front end of the connecting arm. There are two springs 64, and the middle of the auxiliary contact piece 63 and the moving contact piece are connected together. A hook seat 66 is fixedly installed on the left and right sides of the middle part of the contact piece (located at the upper end of the connecting arm). The upper and lower ends of the two springs 64 are respectively rotatably hooked onto the outside of the hook seat of the auxiliary contact piece 63 and the moving contact piece 61. The stationary contact piece 62 has a "U" shaped structure, and its upper end has a "V" shaped elastic structure. The lower ends of the four isolation plates 2 are respectively fixedly installed longitudinally on the base plate 1 at left and right intervals. The lower front end of the stationary contact piece 62 is fixedly installed with a wire outlet seat 621 (with a bolt at the upper front end). The lower part of the wire outlet seat 621 of the stationary contact pieces of the three sets of opening and closing mechanisms is fixedly installed longitudinally at left and right intervals at the front end of the base plate 1 and located between the front ends of the four isolation plates. The wire outlet seat 621 of the stationary contact pieces of the three sets of opening and closing mechanisms and the three The electrical load terminals are fixedly connected by bolts and nuts; there are two support seats 3, two fixed arms 5, and two shafts 7. Each support seat 3 has a shaft hole at its upper end. The outer ends of the two shafts 7 are rotatably fitted into the shaft holes of the two support seats 3. The lower ends of the two fixed arms 5 are fixedly installed on the inner ends of the two shafts 7 and are rotatably located on the inner ends of the two support seats 3. The lower ends of the two support seats 3 are fixedly installed on the left and right sides of the rear end of the base plate 1; the lower ends of the moving contact plates 63 of the three sets of opening and closing mechanisms are rotatably installed on a wire inlet seat 611 (with bolts at the upper rear end). The lower parts of the wire inlet seats 611 of the moving contact plates of the three sets of opening and closing mechanisms are fixedly installed longitudinally on the rear end of the base plate 1 at left and right intervals and located on the four isolation plates 2. Between the rear ends, the inlet seat 611 of the moving contact plate of the three sets of opening and closing mechanisms and the terminal of the three power supply wires are fixedly connected by bolts and nuts; the upper end of the connecting arm 65 of the three sets of opening and closing mechanisms has a through shaft hole on the left and right sides respectively, and the connecting rod 4 is rotatably sleeved in the shaft hole of the connecting arm 65 of the three sets of opening and closing mechanisms. The left and right sides of the connecting rod 4 are fixedly installed together with the inner side of the upper end of the two fixed arms 5 respectively; the lower end of the outer protective shell is fixedly installed on the upper end of the base plate 1, and the isolation plate 2, support seat 3, connecting rod 4, fixed arm 5, opening and closing mechanism, etc. are all located inside the outer protective shell; there is an opening in the middle of the rear right end of the outer protective shell, and the outer side of the right end shaft is located outside the right side of the protective shell through the opening. The rear end of the handle is fixedly installed on the outer side of the right end shaft.
[0018] Figure 1 , 2 As shown in Figures 3 and 4, the moving contact piece 61 and stationary contact piece 62 of the three sets of opening and closing mechanisms are aligned longitudinally in a straight line. The moving contact piece 61 and auxiliary contact piece 63 have the same thickness on both sides. The lower rear end of the auxiliary contact piece 63 has a bevel 631. The lower rear end of the auxiliary contact piece 63 is spaced a certain distance from the front end of the moving contact piece 61. The lower end of the auxiliary contact piece 63 can rotate a certain angle back and forth along the rotation mounting point of the moving contact piece 62. The spacing between the inner upper ends of the stationary contact pieces 62 is greater than the lateral width of the auxiliary contact piece 63 and the moving contact piece 61, while the spacing between the inner lower ends of the stationary contact pieces 62 is less than the lateral width of the auxiliary contact piece 63 and the moving contact piece 61. The moving contact piece 61, stationary contact piece 62, auxiliary contact piece 63, spring 64, hook seat 66, outlet seat 621, and inlet seat 611 are made of copper, while the remaining components are made of plastic insulation.
[0019] Figure 1 , 2As shown in Figures 3 and 4, this new type of circuit breaker has all the functions of a conventional opening and closing power switch. Specifically, when the operator pulls the handle backward or forward, the handle will cause the lower ends of the two fixed arms 5 to rotate along the shaft holes of the two support seats 3 via the shaft rod 7. The upper ends of the two fixed arms 5 will cause the three connecting arms 65 to move backward or forward via the connecting rod 4. The three connecting arms 65 will cause the moving contact plates 61 of the three sets of opening and closing mechanisms to rotate backward or forward along the rotation point of the inlet seat 611. When the moving contact piece 61 rotates forward to a certain angle, the front ends of the moving contact pieces 61 of the three sets of opening and closing mechanisms respectively engage with the stationary contact pieces 62 of the three sets of opening and closing mechanisms, completing the closing action of the opening and closing power switch. When the moving contact pieces 61 of the three sets of opening and closing mechanisms rotate backward to a certain angle, the front ends of the moving contact pieces 61 of the three sets of opening and closing mechanisms separate from the stationary contact pieces 62 of the three sets of opening and closing mechanisms, completing the opening action of the opening and closing power switch. In this new invention, specifically, when the operator operates the handle to control the engagement of the moving contact plate 61 and stationary contact plate 62 of the three sets of opening and closing mechanisms, under the tension of the spring 64 of the three sets of opening and closing mechanisms, the moving contact plate 61 and the auxiliary contact plate 63 of the three sets of opening and closing mechanisms can simultaneously engage with the stationary contact plate 62 to transmit power. Initially, when the operating handle is turned backward to separate the moving contact plate 61 of the three sets of opening and closing mechanisms, due to the elastic relaxation of the spring 64, although the moving contact plate 61 and the stationary contact plate of the three sets of opening and closing mechanisms have separated, the auxiliary contact plate 63 and the stationary contact plate 62 of the three sets of opening and closing mechanisms remain in contact. As the handle is turned backward to a certain position... At a fixed angle, the front end of the moving contact piece 61 of the three sets of opening and closing mechanisms contacts the lower rear end of the auxiliary contact piece 63 of the three sets of opening and closing mechanisms. In this way, the auxiliary contact piece 63 of the three sets of opening and closing mechanisms will separate from the stationary contact piece 62 of the three sets of opening and closing mechanisms. At the moment of separation between the auxiliary contact piece 63 and the stationary contact piece 62, the backward pulling force of the spring 64 is quickly released, and the auxiliary contact piece 63 can quickly separate from the stationary contact piece 62. Because the moving contact piece 61 and the stationary contact piece 62 separate quickly, the probability of generating an electric arc is reduced, which can play a good protective role for the moving contact piece 61 and the stationary contact piece 62, and correspondingly ensure the stable working performance of the opening and closing power switch.
[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.
[0021] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An arc-reducing isolating power switch, comprising a base plate, handle, outer protective shell, isolation plate, support base, connecting rod, fixed arm, shaft, and opening / closing mechanism; characterized in that, The circuit breaker mechanism and isolation plates are provided in multiple sets. Each set includes a moving contact plate, a stationary contact plate, an auxiliary contact plate, a spring, and a connecting arm. The lower end of the connecting arm and the rear middle of the moving contact plate are fixedly installed together. The lower rear end of the auxiliary contact plate is rotatably installed on the front middle of the moving contact plate. Hook seats are fixedly installed on the middle of the auxiliary contact plate and the middle of the moving contact plate, respectively. The upper and lower ends of the spring are rotatably hooked onto the outside of the hook seats of the auxiliary contact plate and the moving contact plate, respectively. The lower ends of the multiple isolation plates are fixedly installed longitudinally on the base plate at intervals on the left and right. A cable outlet seat is fixedly installed on the lower front of the stationary contact plate. The lower parts of the cable outlet seats of the stationary contact plates of the multiple sets of circuit breaker mechanisms are fixedly installed longitudinally on the front end of the base plate at intervals on the left and right. There are at least two support seats, fixed arms, and shafts. Each support seat has... The upper end of each component has a shaft hole. The outer ends of the two shafts are rotatably fitted into the shaft holes of the two support seats. The lower ends of the two fixed arms are fixedly installed on the inner ends of the two shafts. The lower ends of the two support seats are fixedly installed on both sides of the rear end of the base plate. The lower ends of the moving contact plates of the multiple sets of opening and closing mechanisms are rotatably installed on a wire inlet seat. The lower parts of the wire inlet seats of the moving contact plates of the multiple sets of opening and closing mechanisms are fixedly installed longitudinally on the rear end of the base plate at left and right intervals. The upper end of the connecting arm of the multiple sets of opening and closing mechanisms has a shaft hole. The connecting rod is rotatably fitted into the shaft hole of the connecting arm of the multiple sets of opening and closing mechanisms. The left and right sides of the connecting rod are fixedly installed together with the inner sides of the upper ends of the two fixed arms. The lower end of the outer protective shell is fixedly installed on the upper end of the base plate. One side of the protective shell has an opening. One side of the shaft is located outside the protective shell through the opening. The rear end of the handle is fixedly installed on the outer side of the shaft.
2. The arc-reducing isolation power switch according to claim 1, characterized in that, The moving contact plates and stationary contact plates of the multiple opening and closing mechanisms are aligned longitudinally in the front and rear directions, and the left and right thicknesses of the moving contact plates and auxiliary contact plates are consistent.
3. The arc-reducing isolation power switch according to claim 1, characterized in that, The auxiliary contact piece has a bevel at its lower rear end, and the lower rear end of the auxiliary contact piece is a certain distance away from the front end of the moving contact piece.
4. The arc-reducing isolation power switch according to claim 1, characterized in that, The spacing between the inner sides of the upper ends of the stationary contact pieces is greater than the left and right widths of the auxiliary contact pieces and the moving contact pieces, while the spacing between the inner sides of the lower ends of the stationary contact pieces is less than the left and right widths of the auxiliary contact pieces and the moving contact pieces.
5. The arc-reducing isolation power switch according to claim 1, characterized in that, The moving contact piece, stationary contact piece, auxiliary contact piece, spring, hook base, cable outlet base, and cable inlet base are all made of metal.