High breaking capacity disconnect switch

Abstract

This invention relates to a high breaking capacity disconnector, comprising a housing, a handle, a contact frame slidably disposed within the housing, a pull rod disposed between the handle and the contact frame, a spring disposed between the contact frame and the housing, a moving contact linked to the contact frame, and two stationary contacts cooperating with the moving contact. Each of the two stationary contacts has an arc-guiding iron sheet disposed on one side. Multiple iron core sleeves are arranged at intervals below the arc-guiding iron sheets within the housing. This invention has the advantages of simple structure, stable and reliable performance, long service life, and good arc-extinguishing effect.

Description

Technical Field

[0001] This invention relates to a disconnecting switch, and more specifically to a high breaking capacity disconnecting switch. Background Technology

[0002] Currently, miniature disconnect switches are suitable for AC 50Hz or 60Hz power distribution and control circuits with a rated operating voltage of 220 / 380V and below. They are primarily used as main switches for terminal electrical appliances, but can also be used to control various types of motors, low-power appliances, and lighting. They are widely used in industrial and mining enterprises, high-rise buildings, commercial establishments, and homes. However, miniature disconnect switches have poor arc-extinguishing performance. When the moving contact breaks with the stationary contact, an electric arc is generated. This arc not only causes significant damage to the contacts but also prolongs the circuit breaking time, posing a potential hazard to the disconnect switch's use. Therefore, these disconnect switches suffer from unreliable performance and low breaking capacity. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high breaking capacity disconnect switch that is simple in structure, stable and reliable in performance, long in service life and good in arc extinguishing effect.

[0004] To achieve the above objectives, the present invention employs a high breaking capacity disconnect switch, comprising a housing, a handle, a contact frame slidably disposed within the housing, a pull rod disposed between the handle and the contact frame, a spring disposed between the contact frame and the housing, a moving contact linked to the contact frame, and two stationary contacts cooperating with the moving contact. Each of the two stationary contacts is provided with an arc-guiding iron sheet on one side, and multiple iron core sleeves are arranged at intervals below the corresponding arc-guiding iron sheets within the housing.

[0005] The beneficial effects of the above structure are: the arc-initiating plate can play an arc-pulling role, introducing the electric arc between the moving and stationary contacts into the space between multiple iron core bushings. The arc rotates among the multiple iron core bushings, and can be rapidly cooled and extinguished, resulting in better arc extinguishing effect. The arc will not burn the moving and stationary contacts, extending their service life and improving the breaking capacity of the disconnecting switch. Therefore, this disconnecting switch has the advantages of simple structure, stable and reliable performance, long service life, and good arc extinguishing effect.

[0006] Specifically, an arc-inducing plate is provided on the other side of the two stationary contacts. One end of the arc-inducing plate has a stationary contact point, and the other end has an arc-shaped arc-inducing portion. The arc-shaped arc-inducing portion of the arc-inducing plate can attract the electric arc at the stationary contact point, thereby preventing the electric arc from burning the stationary contact point and helping to extend the service life of the stationary contact.

[0007] Specifically, multiple support columns are respectively provided within the housing at the locations of multiple iron core sleeves. The multiple iron core sleeves are respectively fitted onto the multiple support columns, forming a snap-fit ​​connection between the multiple iron core sleeves and the multiple support columns. The multiple iron core sleeves mounted on the multiple support columns can elongate the electric arc, and the arc can be rapidly cooled between the multiple iron core sleeves, which is beneficial for the rapid extinguishing of the arc. Furthermore, the multiple iron core sleeves can be snapped onto the multiple support columns within the housing, thus facilitating the assembly of the iron core sleeves with the housing and making assembly more convenient.

[0008] Specifically, each of the two moving contacts has an arc-inducing angle at its two ends, corresponding to the two moving contact points. Multiple arc-cutting protrusions are provided inside the housing at each arc-inducing angle, with the tail of the arc-inducing angle extending towards the multiple arc-cutting protrusions. The arc-inducing angle can quickly guide the electric arc on the moving contact to the multiple arc-cutting protrusions, which can cut the arc, facilitating its rapid extinguishing and thus improving the breaking capacity of the high-breaking capacity disconnector.

[0009] Specifically, the multiple tangential ridges are arranged at intervals, and tangential channels are formed between the multiple tangential ridges. The tangential channels can cut and cool the electric arc between the moving contact and the stationary contact, which is beneficial to the rapid extinguishing of the electric arc.

[0010] Specifically, one end of the stationary contact has a wire-pressing portion that inserts into the terminal block, and a wire-pressing cavity is formed between the wire-pressing portion and the terminal block. Since one end of the stationary contact is inserted into the terminal block, the stationary contact and the terminal block are modularly integrated, facilitating modular assembly of the terminal block and the stationary contact, and improving assembly efficiency.

[0011] Specifically, the lower end face of the wire clamping part is provided with multiple wire clamping protrusions, and the terminal block is provided with multiple anti-slip grooves. The wire clamping protrusions can press the wire tightly into the terminal block, and the anti-slip grooves can prevent the wire from slipping out of the terminal block, making the connection more secure. Attached Figure Description

[0012] Figure 1 This is a perspective view of the internal structure of an embodiment of the present invention.

[0013] Figure 2 This is a front view of the internal structure of an embodiment of the present invention.

[0014] Figure 3 This is an assembly diagram of the stationary contact and the wiring terminal according to an embodiment of the present invention. Detailed Implementation

[0015] like Figures 1 to 3As shown, this embodiment of the invention is a high breaking capacity disconnect switch, including a housing 10, a handle 11, a contact frame 12 slidably disposed within the housing 10, a pull rod 13 disposed between the handle 11 and the contact frame 12, a spring 14 disposed between the contact frame 12 and the housing 10, a moving contact 15 linked to the contact frame 12, and two stationary contacts 16 cooperating with the moving contact 15. Each of the two stationary contacts 16 has an arc-guiding iron sheet 17 disposed on one side. Multiple iron core sleeves 18 are arranged at intervals below the arc-guiding iron sheet 17 inside the housing 10.

[0016] like Figure 1 and 2 As shown, an arc-inducing plate 19 is provided on the other side of the two stationary contacts 16. One end of the arc-inducing plate 19 has a stationary contact 191, and the other end has an arc-shaped arc-inducing portion 192. The arc-shaped arc-inducing portion of the arc-inducing plate can attract the electric arc at the stationary contact, thereby preventing the electric arc from burning the stationary contact and extending the service life of the stationary contact. Multiple support columns 101 are respectively provided inside the housing 10 at the locations of multiple iron core sleeves 18. The multiple iron core sleeves 18 are respectively fitted onto the multiple support columns 101, forming a snap-fit ​​connection between the multiple iron core sleeves 18 and the multiple support columns 101. The multiple iron core sleeves on the multiple support columns can lengthen the electric arc, and the electric arc can be rapidly cooled between the multiple iron core sleeves, which is beneficial for the rapid extinguishing of the electric arc. Furthermore, the multiple iron core sleeves can be snapped onto the multiple support columns inside the housing, thus facilitating the assembly of the iron core sleeves and the housing, making assembly more convenient. The moving contact 15 has an arc-inducing angle 152 at each of its two moving contact points 151. Multiple arc-cutting protrusions 102 are respectively provided inside the housing 10 at the arc-inducing angles 152, with the tail of the arc-inducing angle 152 extending towards the multiple arc-cutting protrusions 102. The arc-inducing angle can quickly introduce the electric arc on the moving contact to the multiple arc-cutting protrusions, which can cut the electric arc, facilitating its rapid extinguishing and thus improving the breaking capacity of the high-breaking capacity disconnector. The multiple arc-cutting protrusions 153 are arranged at intervals, and an arc-cutting channel 103 is formed between the multiple arc-cutting protrusions 102. The arc-cutting channel can cut and cool the electric arc between the moving contact and the stationary contact, facilitating its rapid extinguishing.

[0017] like Figure 2 , 3As shown, one end of the stationary contact 16 has a wire-pressing portion 161 that passes through the terminal 20, and a wire-pressing cavity 200 is formed between the wire-pressing portion 161 and the terminal 20. The stationary contact is inserted into the terminal, thus integrating the stationary contact and the terminal into a modular design, facilitating modular assembly of the terminal and the stationary contact, and improving assembly efficiency. Multiple wire-pressing protrusions 162 are provided on the lower end surface of the wire-pressing portion 161, and multiple anti-slip grooves 201 are provided inside the terminal 20. The wire-pressing protrusions can press the wire tightly into the terminal, and the anti-slip grooves can prevent the wire from slipping out of the terminal, making the connection more secure.

[0018] The arc-initiating piece serves to draw out the electric arc, guiding it from the moving contact to the stationary contact and into multiple iron core bushings. The arc rotates among these bushings, rapidly cooling and extinguishing itself, resulting in better arc extinguishing. The arc does not burn the moving or stationary contacts, extending their service life and improving the breaking capacity of the disconnector. Therefore, this disconnector has the advantages of simple structure, stable and reliable performance, long service life, and excellent arc extinguishing effect.

Claims

1. A high breaking capacity disconnect switch, comprising a housing, a handle, a contact frame slidably disposed within the housing, a pull rod disposed between the handle and the contact frame, a spring disposed between the contact frame and the housing, a moving contact linked to the contact frame, and two stationary contacts cooperating with the moving contact, characterized in that: Each of the two stationary contacts has an arc-guiding iron sheet on one side. Multiple iron core sleeves are arranged at intervals below the arc-guiding iron sheets inside the housing. An arc-inducing plate is provided on the other side of the two stationary contacts. One end of the arc-inducing plate has a stationary contact point, and the other end has an arc-shaped arc-inducing portion. Multiple support columns are provided inside the housing corresponding to the multiple iron core sleeves. The multiple iron core sleeves are respectively fitted onto the multiple support columns, forming a snap-fit ​​connection between the multiple iron core sleeves and the multiple support columns. Each of the two moving contacts has an arc-inducing angle at each of the two moving contact points. Multiple tangential protrusions are provided inside the housing corresponding to the arc-inducing angles, and the tail of the arc-inducing angle extends towards the multiple tangential protrusions.

2. The high breaking capacity disconnector according to claim 1, characterized in that: The multiple tangential convex strips are arranged at intervals, and tangential channels are formed between the multiple tangential convex strips.

3. The high breaking capacity disconnector according to claim 1, characterized in that: One end of the stationary contact has a wire clamping part that is inserted into the terminal block, and a wire clamping cavity is formed between the wire clamping part and the terminal block.

4. The high breaking capacity disconnector according to claim 3, characterized in that: The lower end face of the pressure part is provided with multiple pressure protrusions, and the terminal block is provided with multiple anti-slip grooves.

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