CN115863100A - Rotary isolating switch and electronic equipment - Google Patents

Abstract

The invention discloses a rotary isolating switch and electronic equipment. The rotary isolating switch comprises at least one first stacked module and at least one second stacked module, wherein the first stacked module and the second stacked module are alternately distributed and stacked; the first laminated module and the second laminated module are respectively provided with a moving contact and two static contacts, each static contact is provided with a static contact part, each moving contact is provided with two moving contact parts, and the moving contacts can rotate around an axis so as to enable the moving contact parts to be connected with or disconnected from the corresponding static contact parts; the connecting line between the two static contact parts in the first stacked module and the connecting line between the two static contact parts in the second stacked module have a preset included angle, and the value range of the preset included angle is 30-60 degrees. On one hand, enough creepage distance between the adjacent static contacts is ensured, and the insulativity between the adjacent static contacts is ensured; on the other hand, the exhaust passage has sufficient space to be arranged at the same end of the corresponding static contact part, the electric arc stays in the inner part for a shorter time, and the arc extinguishing and exhaust performance is improved.

Description

Rotary isolating switch and electronic equipment

Technical Field

The invention relates to the technical field of electrical switches, in particular to a rotary isolating switch.

Background

Rotary disconnectors are typically constructed from one or more modular stacked modules, each of which typically includes a movable contact and a pair of stationary contacts.

In order to improve the electrical insulation between adjacent fixed contacts of two vertically adjacent stacked modules, in a rotary isolating switch in the prior art, the adjacent fixed contacts in the two adjacent stacked modules are arranged in a manner substantially perpendicular to each other, but in the two adjacent stacked modules, an outlet of an exhaust channel corresponding to the fixed contact in at least one stacked module cannot be opened at the end where the fixed contact is located, but is located at the other end far away from the fixed contact terminal, so that the path of arc extinguishing exhaust flowing is longer and bent during breaking, the residence time of an arc inside is longer, and the arc extinguishing exhaust function is affected.

In another rotary isolating switch, the adjacent static contacts in two adjacent stacked modules are arranged in the same way, and in order to improve the insulating property, an insulating structure is additionally arranged on the outer side of the stacked modules, so that the whole structure is complex, the cost is high, and a special wiring terminal matched with the insulating structure is required.

Disclosure of Invention

The invention aims to provide a rotary isolating switch, which improves the arc extinguishing and exhausting performance of the switch, ensures the insulating performance between static contacts, and has the advantages of simple structure and low cost.

In order to solve the technical problem, the invention provides a rotary isolating switch, which comprises at least one first stacked module and at least one second stacked module, wherein the first stacked module and the second stacked module are alternately distributed and stacked;

the first stacked module and the second stacked module are respectively provided with a moving contact and two static contacts, each static contact is provided with a static contact part, each moving contact is provided with two moving contact parts, and the moving contacts can rotate around an axis so as to enable the moving contact parts to be connected with or disconnected from the corresponding static contact parts;

the connecting line between the two static contact parts in the first stacked module and the connecting line between the two static contact parts in the second stacked module form a preset included angle, and the value range of the preset included angle is 30-60 degrees.

According to the rotary isolating switch, the connecting line between the two static contact parts in the two adjacent stacked modules is arranged in an included angle, so that on one hand, compared with the arrangement mode that the adjacent static contacts in the two adjacent stacked modules are selected in the prior art, the creepage distance between the adjacent static contacts is ensured, the insulativity between the adjacent static contacts is improved, an independent insulating structure is not required to be arranged, and the structure cost is reduced; on the other hand, compared with the arrangement mode that the adjacent static contacts in the two adjacent laminated modules are basically vertical in the prior art, the included angle ranges from 30 degrees to 60 degrees, the exhaust channel has sufficient space and is arranged at the same end corresponding to the static contact part, the inlet of the exhaust channel is close to the static contact part, the outlet of the exhaust channel penetrates through the end wall of the same end, the flowing path of arc extinguishing exhaust gas is shorter when the exhaust channel is broken, the electric arc stays in the interior for a shorter time, and the arc extinguishing exhaust performance of the rotary isolating switch is improved.

In summary, the rotary isolating switch of the invention has the advantages that the static contact parts in the two adjacent stacked modules are innovatively designed, the arc extinguishing performance and the insulating performance are both considered, the movable contact part and the corresponding static contact part are ensured to be normally disconnected, and the normal work of the rotary isolating switch is ensured.

Optionally, the preset included angle is 45 °.

Optionally, in the first stacked module and the second stacked module, two of the static contact portions are located at two ends of the radial direction corresponding to the movable contact.

Optionally, the first stacked module and the second stacked module each include a housing, the housing is provided with a first mounting seat and two second mounting seats, the moving contact is rotatably mounted on the first mounting seat, and the stationary contact is fixedly mounted on the corresponding second mounting seat.

Optionally, the first stacked module and the second stacked module are both provided with two exhaust channels, and the exhaust channels are disposed at the same end corresponding to the static contact.

Optionally, an inlet end of the exhaust passage is bent to a side close to the stationary contact portion, and an outlet end of the exhaust passage penetrates through a corresponding end wall of the housing.

Optionally, the exhaust passage inlet end is provided with an arc extinguishing chamber.

Optionally, the outlet end of the exhaust passage is provided with a flashover baffle.

The invention also provides electronic equipment comprising the rotary isolating switch.

The electronic device of the present invention includes the aforementioned rotary isolating switch, and therefore has the same technical effects as the aforementioned rotary isolating switch, and will not be described herein again.

Optionally, the electronic device is a photovoltaic inverter.

Drawings

FIG. 1 is a schematic structural diagram of a rotary isolating switch according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a first stacked module in the rotary isolator switch of fig. 1;

FIG. 3 is a schematic view of the first stacked module of FIG. 2;

fig. 4 is a schematic structural view of a second stacked module in the rotary isolating switch of fig. 1;

FIG. 5 is a schematic view of the second stacked module of FIG. 4;

FIG. 6 is a schematic illustration of the position of the stationary contact portions of the first stacked module and the second stacked module in the rotary isolating switch of FIG. 1;

wherein the reference numerals in fig. 1-6 are explained as follows:

1-a first stacked module;

1' -a second stacked module;

11-moving contact;

111-moving contact;

12-a static contact;

121-stationary contact;

13-a housing;

14-an exhaust channel;

15-an arc extinguishing chamber;

16-flashover baffles.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The terms "first," "second," and the like, herein are used for convenience in describing two or more structures or components that are identical or similar in structure and/or function and do not denote any particular limitation in order and/or importance.

As used herein, the term "plurality" refers to an indefinite number of plural, usually more than two; and when the term "plurality" is used to indicate a quantity of a particular element, it does not indicate a quantitative relationship between such elements.

Here, the wall surface in the longitudinal direction of the housing 13 is an "end wall".

Referring to fig. 1 to 6, fig. 1 is a schematic structural diagram of a rotary isolating switch according to an embodiment of the present invention; fig. 2 is a schematic structural view of a first stacked module in the rotary isolator switch of fig. 1;

FIG. 3 is a schematic view of the first stacked module of FIG. 2; FIG. 4 is a schematic diagram of a second stacked module of the rotary isolator of FIG. 1; FIG. 5 is a schematic view of the second stacked module of FIG. 4; fig. 6 is a schematic view of the positions of the stationary contact portions of the first stacked module and the second stacked module in the rotary isolating switch of fig. 1.

The invention provides a rotary isolating switch, which comprises at least one first stacked module 1 and at least one second stacked module 1', wherein the first stacked module 1 and the second stacked module 1' are alternately distributed and stacked;

the first laminated module 1 and the second laminated module 1' are both provided with a movable contact 11 and two fixed contacts 12, each fixed contact 12 is provided with a static contact part 121, each movable contact 11 is provided with two movable contact parts 111, and each movable contact 11 can rotate around an axis so as to enable each movable contact part 111 to be connected with or disconnected from the corresponding static contact part 121;

a connecting line between the two stationary contact parts 121 in the first stacked module 1 and a connecting line between the two stationary contact parts 121 in the second stacked module 1' have a preset included angle, and the value range of the preset included angle is 30-60 degrees.

According to the rotary isolating switch, the connecting line between the two static contact parts 121 in the two adjacent stacked modules is arranged at an included angle, on one hand, compared with the arrangement mode that the adjacent static contacts in the two adjacent stacked modules in the prior art are selected in the same mode, the creepage distance between the adjacent static contacts is increased, the insulativity between the adjacent static contacts is improved, an independent insulating structure is not required to be arranged, the structure is simple, and the structure cost is reduced; on the other hand, compared with the arrangement mode that the adjacent static contacts in the two adjacent stacked modules are basically vertical in the prior art, the included angle ranges from 30 degrees to 60 degrees, as can be seen from fig. 3 and 5, the exhaust channel 14 has sufficient space arranged at the same end of the corresponding static contact part 121, the inlet of the exhaust channel 14 can be arranged close to the static contact part 121, the outlet of the exhaust channel 14 penetrates through the same end wall close to the static contact part 121, the flow path of arc extinguishing exhaust gas is shorter when the arc extinguishing exhaust gas is broken, the residence time of the arc in the interior is shorter, and the arc extinguishing exhaust performance of the rotary isolating switch is improved.

In summary, the rotary isolating switch of the invention, through innovative design of the relative position of the stationary contact part 121 in two adjacent stacked modules, both arc extinguishing performance and insulating performance are taken into consideration, so that the movable contact part 111 and the corresponding stationary contact part 121 are ensured to be normally disconnected, and the rotary isolating switch is ensured to normally work, and the rotary isolating switch has a simple structure and low cost.

Wherein the preset included angle is preferably 45 degrees. In practice, the adjustment can be made according to the size of the housing 13 in the first stacked module 1 and the second stacked module 1'.

With continued reference to fig. 2 to fig. 5, in the first stacked module 1 and the second stacked module 1', two static contact portions 121 are located at two radial ends of the corresponding movable contacts 11.

In other words, a connecting line between the two stationary contact portions 121 passes through the center of the movable contact 11. In this way, the distance between the two stationary contact portions 121 is the farthest, and the creepage distance between the two stationary contact portions 121 is increased.

Of course, in practical applications, the relative position between the two stationary contact portions 121 is not limited to this arrangement, as long as the insulating performance between the two can be ensured.

Further, in this embodiment, each of the first stacked module 1 and the second stacked module 1' includes a housing 13, the housing 13 is provided with a first mounting seat and two second mounting seats, the movable contact 11 is rotatably mounted on the first mounting seat, and the fixed contact 12 is fixedly mounted on the corresponding second mounting seat.

With continued reference to fig. 3 and fig. 5, the first stacked module 1 and the second stacked module 1' are both provided with two exhaust channels 14, and the exhaust channels 14 are disposed at the same end of the corresponding static contact 12; and the inlet end of the exhaust passage 14 is bent toward the side close to the stationary contact portion 121, and the outlet end of the exhaust passage 14 penetrates the corresponding end wall of the housing 13.

Therefore, the exhaust channel 1 is close to the corresponding static contact part 121 as much as possible, the flow path of arc extinguishing exhaust is shorter when the exhaust channel is disconnected, the arc extinguishing exhaust performance of the rotary isolating switch is improved, and the normal operation of the rotary isolating switch is ensured.

Further, as shown in fig. 2 and 4, an inlet end of the exhaust passage 14 is provided with an arc-extinguishing chamber 15. The arc extinguishing chamber 15 has excellent insulation and arc extinguishing performance, can quickly extinguish arc and restrain current after a power supply is cut off, and improves the arc extinguishing and exhausting performance of the rotary isolating switch.

Further, the outlet end of the exhaust passage 14 is provided with a flashover partition 15.

One application scene of the rotary isolating switch is the photovoltaic inverter, the rotary isolating switch is installed inside a box body of the photovoltaic inverter, the box body of the photovoltaic inverter comprises other circuit boards besides the rotary isolating switch, the movable contact part 111 and the static contact part 121 are separated to generate electric arcs, the electric arcs not only comprise high-temperature gas, but also comprise metal particles, and if the metal particles are also discharged from the exhaust channel 14 and are attached to other circuit boards, the metal particles can cause short circuit of other circuit boards, and the normal operation of the photovoltaic inverter is influenced;

therefore, in the embodiment, the flashover partition 15 is arranged at the outlet end of the exhaust passage 14, and the flashover partition 15 may be a mesh metal plate, so that the high-temperature gas can be discharged from the flashover partition 15, and the metal particles are blocked and cannot be discharged together with the high-temperature gas, thereby ensuring the normal operation of other circuit boards and the normal operation of the photovoltaic inverter.

The invention also provides electronic equipment comprising the rotary isolating switch.

The electronic device of the present invention includes the aforementioned rotary isolating switch, and therefore has the same technical effects as the aforementioned rotary isolating switch, and is not described herein again.

Wherein, this electronic equipment can be photovoltaic inverter, and rotatory isolator installs in photovoltaic inverter's box inside.

Certainly, the application scenario of the rotary isolating switch is not limited to the photovoltaic inverter, and the rotary isolating switch can also be widely applied to a power system, such as wind power and the like.

The present invention provides a rotary isolating switch and an electronic device, which are described in detail above, and the principle and the embodiments of the present invention are explained by applying specific examples, and the descriptions of the above examples are only used to help understand the method of the present invention and the core idea thereof. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. A rotary disconnector, characterized in that it comprises at least one first stacked module (1), and at least one second stacked module (1 '), said first stacked module (1) and said second stacked module (1') being alternately distributed and arranged one above the other;

the first laminated module (1) and the second laminated module (1') are respectively provided with a movable contact (11) and two fixed contacts (12), each fixed contact (12) is provided with a static contact part (121), each movable contact (11) is provided with two movable contact parts (111), and the movable contacts (11) can rotate around an axis to enable the movable contact parts (111) to be jointed with or disconnected from the corresponding static contact parts (121);

a connecting line between the two static contact parts (121) in the first lamination module (1) and a connecting line between the two static contact parts (121) in the second lamination module (1') form a preset included angle, and the value range of the preset included angle is 30-60 degrees.

2. The rotary isolating switch according to claim 1, wherein the predetermined included angle is 45 °.

3. The rotary disconnector according to claim 1, characterized in that in the first laminated module (1) and in the second laminated module (1'), two of said static contact portions (121) are located at the two radial ends of the corresponding movable contacts (11).

4. The rotary isolating switch according to claim 1, wherein each of the first stacked module (1) and the second stacked module (1') includes a housing (13), the housing (13) is provided with a first mounting seat and two second mounting seats, the movable contact (11) is rotatably mounted on the first mounting seat, and the fixed contact (12) is fixedly mounted on the corresponding second mounting seat.

5. The rotary disconnector according to claim 4, characterized in that both the first laminated module (1) and the second laminated module (1') are provided with two exhaust channels (14), the exhaust channels (14) being provided at the same end corresponding to the stationary contact (12).

6. The rotary disconnector according to claim 5, characterized in that the inlet end of the exhaust channel (14) is bent towards the side close to the stationary contact head (121), and the outlet end of the exhaust channel (14) extends through the corresponding end wall of the housing (13).

7. A rotary disconnector according to claim 5, characterized in that the inlet end of the exhaust gas channel (14) is provided with an arc-extinguishing chamber (15).

8. A rotary disconnector according to claim 5, characterized in that the outlet end of the exhaust channel (14) is provided with a flashover partition (15).

9. An electronic device comprising a rotary isolating switch according to any one of claims 1 to 8.

10. The electronic device of claim 9, wherein the electronic device is a photovoltaic inverter.

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