Dual contact dual power switching device

Abstract

The utility model relates to double power switch technical field, specifically disclose a double contact double power switching device, main contact component, it includes static main contact and swingable dynamic main contact, and dynamic main contact drives through drive mechanism, arc extinguishing contact component sets up in dynamic main contact end, and arc extinguishing contact component includes arc leading section and arc gathering section, arc leading section one end with dynamic main contact, other end connects arc gathering section, and arc gathering section tip points to arc chamber, arc chamber, its inside is provided with magnetic guiding device, and magnetic guiding device includes arc magnet group one and arc magnet group two, and the concave surface of arc magnet group one and arc magnet group two all are towards arc extinguishing contact component, and magnetic field response arc leading structure sets up on static main contact and links up with magnetic guiding device cooperation, is used for guiding arc motion, realizes power switching function through double contact design, and arc extinguishing contact component and magnetic guiding device synergistic effect, improve arc guiding efficiency, reduce contact ablation.

Description

Technical Field

[0001] This utility model relates to the field of dual power supply switching technology, specifically a dual-contact dual power supply switching device. Background Technology

[0002] In the field of dual power supply switching equipment, although existing technologies have certain arc extinguishing functions, there are many shortcomings in structural design. The arc ignition end structure is simple, with only a common bending design, resulting in low arc guiding efficiency, easy deviation and dispersion, and inability to quickly and effectively introduce the arc into the arc extinguishing chamber, which seriously affects the arc extinguishing efficiency. At the same time, the arc ignition end and the arc extinguishing chamber are not tightly fitted, resulting in large energy loss during arc transmission and reducing the overall performance of the arc extinguishing system.

[0003] The purpose of this invention is to provide a dual-contact dual-power switching device to solve the problems mentioned in the background art. Utility Model Content

[0004] To achieve the above objectives, this utility model provides a dual-contact dual-power switching device. 1. A dual-contact dual-power switching device, comprising...

[0005] The main contact assembly includes a stationary main contact and a oscillating moving main contact, the moving main contact being driven by a drive mechanism;

[0006] An arc-extinguishing contact assembly is located at the end of the moving main contact. The arc-extinguishing contact assembly includes an arc-initiating section and an arc-concentrating section. One end of the arc-initiating section is connected to the moving main contact, and the other end is connected to the arc-concentrating section. The tip of the arc-concentrating section points towards the arc-extinguishing chamber.

[0007] The arc-extinguishing chamber is equipped with a magnetic guiding device, which includes an arc-shaped magnet group one and an arc-shaped magnet group two. The concave surfaces of the arc-shaped magnet group one and the arc-shaped magnet group two both face the arc-extinguishing contact assembly.

[0008] The magnetic field-responsive arc-initiating structure is located on the stationary main contact and works in conjunction with the magnetic guiding device to guide the movement of the electric arc.

[0009] The power switching function is achieved through a dual-contact design. The arc-extinguishing contact assembly and the magnetic guiding device work together to improve the arc guiding efficiency and reduce contact erosion.

[0010] As a further improvement of this utility model, an arc-extinguishing grid plate group is also provided in the arc-extinguishing chamber. Arc-shaped magnet group one is arranged on the upper and lower sides of the arc-extinguishing grid plate group, and arc-shaped magnet group two is arranged on the left and right sides of the arc-extinguishing grid plate group. The grid plate group divides the electric arc to accelerate its extinction. Arc-shaped magnet group one and two form a composite magnetic field, which enhances the arc driving capability and shortens the arc-extinguishing time.

[0011] As a further improvement of this utility model, the second arc magnet group consists of multiple vertically arranged arc magnets, while the first arc magnet group consists of a single arc magnet. The combination of multiple vertically arranged arc magnets and the single arc magnet optimizes the magnetic field distribution and improves the controllability of the arc motion path.

[0012] As a further improvement of this utility model, the inner surface and outer surface of the arc-shaped magnet one and the arc-shaped magnet two are respectively N pole and S pole. The N pole and S pole of the arc-shaped magnet two are alternately distributed, and the inner surface and outer surface are respectively N pole and S pole. Moreover, the polarity of the arc-shaped magnets alternates, generating an alternating magnetic field, which enhances the arc rotation and dispersion effect.

[0013] As a further improvement of this utility model, the single arc length of the second arc magnet is less than the arc length of the first arc magnet, and the arc length of the second arc magnet is less than that of the first arc magnet, forming a gradient magnetic field to guide the electric arc to move in a directional manner to the arc extinguishing grid plate group, thereby improving the arc extinguishing success rate.

[0014] As a further improvement of this utility model, the arc-initiating segment is spiral-shaped, and the arc-convex segment is truncated cone-shaped. The pitch of the arc-initiating segment gradually decreases from the connection point with the moving main contact to the end. The spiral structure extends the arc path and enhances cooling, while the truncated cone shape focuses the arc energy and improves the arc extinguishing efficiency.

[0015] As a further improvement of this utility model, a spiral arc-initiating groove is provided on the surface of the arc-initiating section. The depth of the arc-initiating groove gradually increases from the moving main contact to the arc-converging section. The spiral arc-initiating groove structure further constrains the arc path. The gradual depth design makes the arc energy evenly distributed along the path and reduces local overheating.

[0016] As a further improvement of this utility model, the magnetic field response arc-initiating structure is a stationary contact arc-initiating plate. The surface of the stationary contact arc-initiating plate is provided with a spiral groove. The groove, together with the first arc-shaped magnet group and the second arc-shaped magnet group, forms a magnetic field coupling structure. The spiral direction of the spiral groove is orthogonal to the magnetic field direction of the second arc-shaped magnet group. The spiral groove and the magnet group are orthogonally coupled to form a Lorentz force that drives the arc to quickly detach from the contact, protecting the main contact from ablation.

[0017] As a further improvement of this utility model, the contact surface of the stationary main contact is provided with a conical groove, which matches the conical truncated cone.

[0018] As a further improvement of this utility model, the arc-extinguishing contact assembly is made of tungsten-copper alloy material and coated with a tungsten carbide wear-resistant layer. The high thermal conductivity of the tungsten-copper alloy reduces the temperature rise of the contact, and the tungsten carbide coating improves wear resistance and significantly extends the contact life.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model, through the spiral structure of the arc-initiating section and the design of the arc-initiating groove, changes the simple shape of the ordinary bending of the arc-initiating end in the existing technology, forms an orderly guide for the electric arc, reduces the problems of deviation and dispersion, allows the electric arc to enter the arc-extinguishing chamber quickly and effectively, improves the arc-extinguishing efficiency, and avoids the arc-extinguishing process being slowed down due to poor arc guidance.

[0021] 2. This utility model optimizes the matching structure between the arc-initiating end and the arc-extinguishing chamber, making the connection between the two tighter, reducing energy loss during arc transmission, enhancing the overall performance of the arc-extinguishing system, solving the defects of existing technologies that lead to energy waste and poor system performance due to matching problems, and making the arc-extinguishing process more efficient and stable. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the arc-extinguishing chamber of this utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the arc-extinguishing chamber of this utility model. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the arc-extinguishing chamber of this utility model. Figure 3 ;

[0025] Figure 4 This is a partial structural schematic diagram of the dual power supply switching device of this utility model.

[0026] In the diagram: 1. Stationary main contact; 11. Conical groove; 12. Moving main contact; 21. Arc-initiating section; 22. Arc-gathering section; 3. Arc-extinguishing chamber; 31. Magnetic guiding device; 311. Arc-shaped magnet group one; 312. Arc-shaped magnet group two; 313. Arc-shaped magnet one; 314. Arc-shaped magnet two; 32. Arc-extinguishing grid plate group; 4. Spiral arc-initiating groove; 5. Stationary contact arc-initiating plate; 51. Spiral groove; 6. Drive mechanism. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more comprehensive description of it will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of this utility model more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Example 1:

[0031] Please see Figure 1-4 This utility model provides a dual-contact dual-power switching device, including...

[0032] The main contact assembly includes a stationary main contact 1 and a swayable moving main contact 12, which is driven by a drive mechanism 6.

[0033] An arc-extinguishing contact assembly is disposed at the end of the moving main contact 12. The arc-extinguishing contact assembly includes an arc-inducing section 21 and an arc-gathering section 22. One end of the arc-inducing section 21 is connected to the moving main contact 12, and the other end is connected to the arc-gathering section 22. The tip of the arc-gathering section 22 points towards the arc-extinguishing chamber 3.

[0034] The arc-extinguishing chamber 3 is equipped with a magnetic guiding device 31. The magnetic guiding device 31 includes an arc-shaped magnet group one 311 and an arc-shaped magnet group two 312. The concave surfaces of the arc-shaped magnet group one 311 and the arc-shaped magnet group two 312 both face the arc-extinguishing contact assembly.

[0035] The magnetic field-responsive arc-initiating structure is set on the stationary main contact 1 and works in conjunction with the magnetic guiding device 31 to guide the movement of the electric arc.

[0036] The power switching function is achieved through a dual-contact design. The arc-extinguishing contact assembly and the magnetic guide device 31 work together to improve the arc guiding efficiency and reduce contact erosion.

[0037] The arc extinguishing chamber 3 is also equipped with an arc extinguishing grid plate group 32. Arc magnet group one 311 is set on the upper and lower sides of the arc extinguishing grid plate group 32, and arc magnet group two 314 is set on the left and right sides of the arc extinguishing grid plate group 32. The grid plate group divides the arc to accelerate its extinction. Arc magnet group one 311 and group two form a composite magnetic field, which enhances the arc driving capability and shortens the arc extinguishing time.

[0038] The arc-initiating segment 21 is spiral-shaped, and the arc-convex segment 22 is a truncated cone. The pitch of the arc-initiating segment 21 gradually decreases from the connection with the moving main contact 12 to the end. The spiral structure extends the arc path and enhances cooling, while the truncated cone shape focuses the arc energy and improves the arc extinguishing efficiency.

[0039] The surface of the arc-initiating section 21 is provided with a spiral arc-initiating groove 4. The depth of the arc-initiating groove gradually increases from the moving main contact 12 to the arc-converging section 22. The spiral arc-initiating groove 4 structure further constrains the arc path. The gradual depth design makes the arc energy evenly distributed along the path and reduces local overheating.

[0040] The magnetic field response arc-initiating structure is a stationary contact arc-initiating piece 5. The surface of the stationary contact arc-initiating piece 5 is provided with a spiral groove 51. The groove, together with the arc-shaped magnet group 1 311 and the arc-shaped magnet group 2 312, forms a magnetic field coupling structure. The spiral direction of the spiral groove 51 is orthogonal to the magnetic field direction of the arc-shaped magnet group 2 312. The spiral groove and the magnet group are orthogonally coupled to form a Lorentz force that drives the arc to quickly detach from the contact, protecting the main contact from ablation.

[0041] The contact surface of the stationary main contact 1 is provided with a conical groove 11, which matches the truncated cone of the arc-gathering segment 22, significantly improving the contact reliability between the truncated cone of the arc-gathering segment 22 and the stationary main contact 1, and further optimizing the arc extinguishing performance.

[0042] When the moving main contact 12 separates from the stationary main contact 1 to generate an electric arc, the arc first enters the spiral arc-initiating groove 4 of the arc-initiating section 21. As the pitch decreases and the groove depth increases, the arc energy is effectively concentrated. At the same time, the spiral groove 51 of the stationary contact arc-initiating plate 5 couples with the magnetic field generated by the magnetic guiding device 31. Under the action of the Lorentz force, the arc moves along the arc-initiating groove towards the arc-gathering section 22. The truncated cone structure of the arc-gathering section 22 further guides the arc into the arc-extinguishing chamber 3. The gradient alternating magnetic field formed by the arc-shaped magnet group one 311 and the arc-shaped magnet group two 312, combined with... The arc-extinguishing grid assembly 32 divides, elongates, and extinguishes the arc quickly, achieving efficient arc extinguishing. Ordinary bent arc-initiating ends are difficult to effectively constrain the arc, and the arc is prone to deviation and dispersion during the breaking process. In this embodiment, by designing the arc-initiating segment 21 as a spiral shape with a gradually changing pitch and arc-initiating groove depth, and in conjunction with the magnetic field coupling structure formed by the stationary contact arc-initiating plate 5 and the magnetic guiding device 31, the special shape of the spiral arc-initiating segment 21 can stably guide the arc along a preset path and avoid deviation. Compared with the traditional ordinary bent arc-initiating end, the arc guiding efficiency is improved.

[0043] Example 2:

[0044] This embodiment is based on Embodiment 1. Please refer to the following for details. Figure 1-3 Arc magnet group 2 312 is composed of multiple vertically arranged arc magnets 2 314, and arc magnet group 1 311 is composed of a single arc magnet 1 313. The combination of multiple vertically arranged arc magnets 2 314 and a single arc magnet 1 313 optimizes the magnetic field distribution and improves the controllability of the arc movement path.

[0045] The inner and outer surfaces of the arc-shaped magnet 313 and the arc-shaped magnet 314 are N and S poles, respectively. The N and S poles of the arc-shaped magnet 314 are alternately distributed, and the inner and outer surfaces are N and S poles, respectively. The polarity of the arc-shaped magnet 314 is alternating, generating an alternating magnetic field, which enhances the rotation and dispersion effect of the electric arc.

[0046] The arc length of the second arc magnet 314 is less than the arc length of the first arc magnet 313. The arc length of the second arc magnet 314 is less than that of the first arc magnet 313, forming a gradient magnetic field that guides the arc to move in a directional manner to the arc extinguishing grid plate group 32, thereby improving the arc extinguishing success rate.

[0047] When the electric arc enters the arc-extinguishing chamber 3, the magnetic pole distribution of arc-shaped magnet 313 and arc-shaped magnet 314 generates a magnetic field force in a specific direction, driving the arc to rotate directionally within the arc-extinguishing chamber 3. The shorter single arc length of arc-shaped magnet 314 creates a gradient change in the magnetic field within the arc-extinguishing chamber 3, enhancing its guiding ability. During rotation, the arc is divided into multiple short arcs by the arc-extinguishing grid assembly 32. Combined with the magnetic field force generated by the alternating magnetic poles, this accelerates arc cooling and extinguishing, reduces contact erosion, and improves the reliability of the device. Compared with the existing technology of single-direction or fixed magnetic pole magnet layout, this design improves the controllability of arc movement in the arc-extinguishing chamber 3, and can quickly and stably guide the arc entering the arc-extinguishing chamber 3 to the arc-extinguishing grid assembly 32. The efficiency of arc segmentation is improved, which greatly accelerates the arc extinguishing speed, effectively avoids the problem of incomplete extinguishing caused by arc movement disorder, reduces the arc ablation of the contacts and internal structure of the arc-extinguishing chamber 3, extends the service life of the arc-extinguishing grid assembly 32, and reduces the frequency of equipment maintenance.

[0048] Example 3:

[0049] This embodiment is based on Embodiment 1. Please refer to the following for details. Figure 4 The arc-extinguishing contact assembly is made of tungsten-copper alloy material, with a tungsten carbide wear-resistant layer plated on the surface. The high thermal conductivity of the tungsten-copper alloy reduces the temperature rise of the contact.

[0050] During the dual power supply switching process, the arc-extinguishing contact assembly frequently participates in the generation and extinguishing of the arc. The tungsten-copper alloy material has both high conductivity and good heat dissipation, which can quickly conduct arc heat and avoid local overheating. The tungsten carbide wear-resistant layer significantly improves the wear resistance of the contact surface. In the overall structural design, when an arc is generated, the arc-extinguishing contact assembly can effectively guide the arc into the arc-extinguishing chamber 3. At the same time, thanks to the material advantages, it maintains stable performance under long-term high-frequency operation, extends the service life of the device, and reduces maintenance costs.

[0051] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A dual-contact dual-power switching device, characterized in that: include The main contact assembly includes a stationary main contact (1) and a swayable moving main contact (12), which is driven by a drive mechanism (6). An arc-extinguishing contact assembly is disposed at the end of the moving main contact (12). The arc-extinguishing contact assembly includes an arc-inducing section (21) and an arc-gathering section (22). One end of the arc-inducing section (21) is connected to the moving main contact (12), and the other end is connected to the arc-gathering section (22). The tip of the arc-gathering section (22) points towards the arc-extinguishing chamber (3). The arc-extinguishing chamber (3) is equipped with a magnetic guiding device (31). The magnetic guiding device (31) includes an arc-shaped magnet group one (311) and an arc-shaped magnet group two (312). The concave surfaces of the arc-shaped magnet group one (311) and the arc-shaped magnet group two (312) are both facing the arc-extinguishing contact assembly. The magnetic field response arc-inducing structure is set on the stationary main contact (1) and works in conjunction with the magnetic guiding device (31) to guide the movement of the electric arc.

2. The dual-contact dual-power switching device according to claim 1, characterized in that: The arc-extinguishing chamber (3) is also equipped with an arc-extinguishing grid plate group (32), an arc-shaped magnet group one (311) is set on the upper and lower sides of the arc-extinguishing grid plate group (32), and an arc-shaped magnet two (314) is set on the left and right sides of the arc-extinguishing grid plate group (32).

3. The dual-contact dual-power switching device according to claim 2, characterized in that: Arc magnet group two (312) consists of multiple vertically arranged arc magnets two (314), and arc magnet group one (311) consists of a single arc magnet one (313).

4. A dual-contact dual-power switching device according to claim 3, characterized in that: The inner and outer surfaces of the arc-shaped magnets 1 (313) and 2 (314) are N and S poles, respectively, and the N and S poles of the arc-shaped magnet 2 (314) are alternately distributed.

5. A dual-contact dual-power switching device according to claim 3, characterized in that: The arc length of the second arc magnet (314) is less than the arc length of the first arc magnet (313).

6. A dual-contact dual-power switching device according to claim 1, characterized in that: The arc-leading segment (21) is spiral-shaped, and the arc-gathering segment (22) is truncated cone-shaped. The pitch of the arc-leading segment (21) gradually decreases from the connection with the moving main contact (12) to the end.

7. A dual-contact dual-power switching device according to claim 6, characterized in that: The surface of the arc-initiating section (21) is provided with a spiral arc-initiating groove (4), and the depth of the arc-initiating groove gradually increases from the moving main contact (12) to the arc-gathering section (22).

8. A dual-contact dual-power switching device according to claim 1, characterized in that: The magnetic field response arc-inducing structure is a stationary contact arc-inducing plate (5). The surface of the stationary contact arc-inducing plate (5) is provided with a spiral groove (51). The groove, together with the first arc magnet group (311) and the second arc magnet group (312), forms a magnetic field coupling structure. The spiral direction of the spiral groove (51) is orthogonal to the magnetic field direction of the second arc magnet group (312).

9. A dual-contact dual-power switching device according to claim 6, characterized in that: The main contact has a tapered groove (11) on its contact surface, and the tapered groove (11) matches the truncated cone of the conical segment (22).

10. A dual-contact dual-power switching device according to claim 1, characterized in that: The arc-extinguishing contact assembly is made of tungsten-copper alloy material and has a tungsten carbide wear-resistant layer on its surface.

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