A low temperature rise disconnector

Abstract

The utility model relates to a kind of low temperature-rise disconnecting switch, and the accommodation end supported by contact provides stable mounting position for movable contact, so that movable contact can be firmly fixed in shell, ensure the position accuracy of movable contact in working process, reduce the problem such as poor contact caused by movable contact shaking, movable contact uses integrally-formed main part, two ends respectively extend outward to form contact arm, simple and compact structure, reduce the number of parts, reduce manufacturing and assembly cost, also improve the overall strength and reliability of movable contact, wiring board is integrated straight contact plate, simple structure, large contact area, can provide good conductivity, reduce contact resistance, reduce temperature rise, and contact arm is provided with cylindrical contact point at one end close to wiring board, can increase the contact pressure between contact arm and wiring board, make contact more closely, to effectively reduce contact resistance.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to a low-temperature rise disconnecting switch. Background Technology

[0002] In power systems, disconnecting switches are key devices used for isolating power sources, switching operations, and connecting / closing circuits with no or low current. However, existing disconnecting switches suffer from several drawbacks. Their moving contact structures are complex, consisting of multiple components, increasing manufacturing and assembly costs and reducing overall strength and reliability. Regarding conductivity and temperature rise control, some terminal blocks have small contact areas, resulting in poor conductivity, high resistance, and excessive heat generation when current flows through them, accelerating component aging, reducing performance, and even causing insulation damage and short circuits. Furthermore, in terms of heat dissipation and assembly maintenance, their design is poor, with small contact areas and low efficiency, making it difficult to dissipate heat effectively. Finally, regarding insulation and mechanical strength, the smooth surface of the contact arms results in short creepage distances, making them prone to surface flashover short circuits in humid or dusty environments. Additionally, the insufficient mechanical strength of the contact arms makes them susceptible to deformation and breakage, affecting normal use. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a low-temperature rise isolating switch with good operation convenience, high transmission stability, and strong conductivity and temperature rise control.

[0004] To achieve the above objectives, this utility model employs a low-temperature rise isolating switch, comprising a housing, within which a transmission mechanism is provided. The transmission mechanism includes a handle installed within the housing, one end of which extends outward through a handle slot on the housing, and the other end of which is provided with a contact support installed within the housing. The contact support includes a receiving end and a connecting rod end, the connecting rod end being engaged with a slot on the handle. A moving contact is installed within the receiving end of the contact support. The moving contact includes an integrally formed main body, with both ends of the main body extending outward to form contact arms. Both ends of the moving contact are provided with wiring plates, which are mirror-shaped and installed and limited within the housing. The wiring plates are integral straight contact plates, and each contact arm has a cylindrical contact point at the end near the wiring plate.

[0005] Compared with existing technologies, the advantages of the above structure are as follows: the receiving end supported by the contact provides a stable mounting position for the moving contact, allowing the moving contact to be firmly fixed in the housing, ensuring the positional accuracy of the moving contact during operation, and reducing problems such as poor contact caused by the shaking of the moving contact. The moving contact adopts an integrally molded main body, with both ends extending outward to form contact arms. The structure is simple and compact, reducing the number of parts and lowering manufacturing and assembly costs. At the same time, it also improves the overall strength and reliability of the moving contact. The terminal block is an integral straight contact plate with a simple structure and a large contact area, which can provide good conductivity, reduce contact resistance, and reduce temperature rise. In addition, the contact arm has a cylindrical contact point at the end near the terminal block, which can increase the contact pressure between the contact arm and the terminal block, making the contact tighter and thus effectively reducing contact resistance.

[0006] This utility model is further configured with a housing comprising a base, a base mounted on one side of the base, and a cover mounted on the other side of the base. Identical transmission mechanisms are provided between the base and the base, and between the base and the cover. A wedge-shaped heat dissipation groove is also provided at the bottom connection between the base and the base. The modular structure of the housing, consisting of the base, the base, and the cover, facilitates the assembly of the entire device. The symmetrical arrangement of the identical transmission mechanisms between the base and the base and between the base and the cover helps improve the stability of the entire device. The wedge-shaped heat dissipation groove at the bottom connection between the base and the base increases the heat dissipation area and improves heat dissipation efficiency.

[0007] This utility model is further configured with groove structures on the surface of the contact arm. By setting the groove structure, the creepage distance on the surface of the contact arm can be increased. Attached Figure Description

[0008] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0009] Figure 2 This is a schematic diagram of the transmission structure inside the base according to an embodiment of the present utility model.

[0010] Figure 3 This is a schematic diagram of the transmission structure inside the base in an embodiment of this utility model from another angle. Detailed Implementation

[0011] like Figures 1-3As shown, this embodiment of the present invention provides a low-temperature rise disconnect switch. The housing 1 consists of three parts: a base 11, a base 12, and a cover 13. The base 12 is installed on one side of the base 11, and the cover 13 is installed on the other side of the base 11. A wedge-shaped heat dissipation groove 2 is provided at the bottom connection between the base 11 and the base 12. The transmission mechanism 3 is the core part of the disconnect switch to realize its operating function. The transmission mechanism 3 includes a handle 31 installed inside the housing 1. One end of the handle 31 extends to the outside of the housing 1 through a handle groove opened on the housing 1, which facilitates manual operation by the operator. The other end of the handle 31 is connected to a contact support 32. The contact support 32 includes a receiving end 33 and a connecting rod end. 34. The connecting rod end 34 is snapped into the slot opened on the handle 31. The movable contact 35 is installed in the receiving end 33 of the contact support 32. The movable contact 35 is made by one-piece molding process. The movable contact 35 includes a one-piece molded main body 36. The two ends of the main body 36 extend outward to form contact arms 37. Both ends of the movable contact 35 are provided with wiring plates 38. The wiring plates 38 are in a mirror layout. The wiring plates 38 are one-piece straight contact plates. The contact arms 37 are provided with cylindrical contact points 371 at the end near the wiring plate 38. The surface of the contact arms 37 is provided with groove structure 372. The same transmission mechanism 3 is provided between the base 11 and the base 12 and between the base 11 and the cover 13.

[0012] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A low temperature rise disconnect switch characterized by: The device includes a housing, within which a transmission mechanism is provided. The transmission mechanism includes a handle installed inside the housing. One end of the handle extends out of the housing through a handle slot. The other end of the handle is also provided with a contact support installed inside the housing. The contact support includes a receiving end and a connecting rod end. The connecting rod end engages with a slot on the handle. A moving contact is installed in the receiving end of the contact support. The moving contact includes an integrally formed main body. Both ends of the main body extend outward to form contact arms. Both ends of the moving contact are provided with wiring plates. The wiring plates are mirror-shaped and are both installed and limited within the housing. The wiring plates are integral straight contact plates. Each contact arm has a cylindrical contact point at the end near the wiring plate.

2. A low-risc disconnecting circuit according to claim 1, characterized in that: The housing includes a base, a base mounted on one side of the base, and a cover mounted on the other side of the base. The same transmission mechanism is provided between the base and the base, and between the base and the cover. A wedge-shaped heat dissipation groove is also provided at the bottom connection between the base and the base.

3. A low-rising disconnector according to claim 1 or 2, characterised in that: The surface of each contact arm is provided with a groove structure.

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