A frame and relay

Abstract

The application relates to the technical field of relays, in particular to a frame used for being mounted on a relay, which comprises a base used for being arranged on the relay and a first enclosure, and further comprises an upper cover and a second enclosure. The high-voltage area and the low-voltage area are separated by the second enclosure arranged in the upper cover and by the second enclosure and the first enclosure, the strength of the second enclosure and the first enclosure can discharge the energy in the high-voltage area to the outside of the relay through the upper cover when the energy impact occurs in the high-voltage area, damage to the low-voltage area is avoided, and the electric arc generated in the high-voltage area can be guided into the arc-extinguishing grid set through the arranged arc-leading assembly and arc-extinguishing grid set, so that the electric arc generated in the high-voltage area is treated, and the electric arc is prevented from ablation to the low-voltage module.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a frame and a relay. Background Technology

[0002] High-voltage relays are widely used in high-power DC circuits. They consist of a high-voltage module that carries a large current and a low-voltage magnetic circuit module that controls the operation. During normal operation, the switching of the high-voltage module contacts in existing high-voltage relays can generate a strong electric arc; in extreme faults, the high-voltage module may even explode.

[0003] However, when the high-voltage module generates an electric arc or explodes, the high temperature, high pressure gas and shock wave of the existing relay structure often directly affect the adjacent low-voltage magnetic circuit module, causing insulation erosion, component damage or even complete failure of the low-voltage module, which seriously affects the reliability, safety and maintainability of the relay.

[0004] Furthermore, when the high-voltage relay is working normally, the high-voltage module will generate an electric arc when switching high current. In the existing technology, the electric arc generated by the high-voltage module will affect the low-voltage module, causing the low-voltage module to be burned by the electric arc and become damaged and unable to work properly.

[0005] Therefore, how to design a structure that can effectively isolate and protect the low-voltage module when the high-voltage module malfunctions is a technical problem that urgently needs to be solved in the field of high-voltage relay technology. Utility Model Content

[0006] The purpose of this application is to provide a frame and relay that can prevent the low-voltage module from being damaged when the high-voltage module explodes, thereby ensuring that the low-voltage module can still be used normally after the high-voltage module explodes.

[0007] To achieve the above objective, this application provides a frame for mounting on a relay. The frame includes a base for mounting on the relay and a first enclosure. The frame also includes:

[0008] Top cover, used to cover the base;

[0009] The second enclosure is set inside the top cover. The shape of the second enclosure matches that of the first enclosure, dividing the interior of the top cover into a low-pressure area and two high-pressure areas. The two high-pressure areas are located at two adjacent corners of the top cover.

[0010] The high-voltage area is equipped with an arc-initiating assembly and an arc-extinguishing grid assembly. The arc-initiating assembly and the arc-extinguishing grid assembly are adjacent to each other. The arc-initiating assembly is used to guide the electric arc to move in the direction of the arc-extinguishing grid assembly.

[0011] Preferably, when the relay and the top cover are installed together, the installation position of the high-voltage module corresponds to the high-voltage area, and the installation position of the low-voltage module corresponds to the low-voltage area.

[0012] Preferably, the second enclosure comprises an integrally extended first section, second section, and third section;

[0013] The first and third sections are connected to the inner shell surface of the top cover, while the second section matches the shape of the middle partition and side panels of the first enclosure.

[0014] Preferably, the structural strength of the first enclosure and the top cover at the connection point between the first and third sections is higher than the structural strength of the corner portions of the top cover.

[0015] Preferably, the two high-voltage areas are separated by a third segment, which is used to increase the creepage distance between the two high-voltage areas.

[0016] Preferably, the arc-initiating assembly includes a first arc-initiating piece, a second arc-initiating piece, a first mounting plate, and a second mounting plate. The first arc-initiating piece and the first mounting plate are attached to each other and are located on the side closer to the inner wall of the upper cover. The second arc-initiating piece and the second mounting plate are attached to each other and are located on the side closer to the low-pressure area. The first arc-initiating piece, the second arc-initiating piece, the first mounting plate, and the second mounting plate together form an arc-shaped arc channel.

[0017] Preferably, the vertical position of the second segment corresponds to the position of the second mounting plate, which facilitates the entry of the electric arc formed in the high-voltage area into the arc-ignition channel.

[0018] Preferably, the relay is also provided with a cavity, and the arc extinguishing grid group is located on the lower side of the arc ignition channel, and the lower side of the arc extinguishing grid group is also connected to the cavity.

[0019] Preferably, after the top cover and the base are fitted together: a gap is left between the side plate of the first enclosure and the middle area of ​​the second section, the gap is used for the mutual circulation of high-temperature gas in the high-pressure area and low-temperature gas in the low-pressure area.

[0020] A relay includes a base, a high-voltage module, and a low-voltage module, and also includes the framework of any one of the claims.

[0021] Compared to the aforementioned background technology, by setting a second enclosure inside the top cover, the high-voltage area and the low-voltage area are separated by the second enclosure and the first enclosure. The strength of the second enclosure and the first enclosure is sufficient to discharge the energy outside the relay through the top cover when an energy impact occurs in the high-voltage area, thus preventing damage to the low-voltage area. Furthermore, by setting an arc-initiating component and an arc-extinguishing grid assembly, the arc generated in the high-voltage area can be guided into the arc-extinguishing grid assembly to process the arc generated in the high-voltage area, preventing the arc from burning the low-voltage module. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the relay structure;

[0024] Figure 2 This is a schematic diagram of the structure of the upper cover in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram showing the location of the arc-starting channel in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram showing the location of the cavity in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram showing the location of the arc-extinguishing grid assembly in an embodiment of this application.

[0028] Among them: 1. Base;

[0029] 2. First enclosure; 201. Side panel; 202. Partition;

[0030] 3. Top cover;

[0031] 4. Second enclosure; 401. First section; 402. Second section; 403. Third section;

[0032] 5. Low-pressure areas;

[0033] 6. High-voltage areas;

[0034] 7. Arc-starting assembly; 701. First arc-starting piece; 702. Second arc-starting piece; 703. First mounting plate; 704. Second mounting plate;

[0035] 8. Arc-extinguishing grid assembly;

[0036] 9. Arc initiation channel; 901. Exit;

[0037] 10. Cavity;

[0038] 11. Gap. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] It should be noted that the directional terms such as "upper end," "lower end," "left side," and "right side" mentioned below are defined based on the accompanying drawings in the instruction manual.

[0042] An embodiment of this utility model provides a frame for mounting on a relay. The frame includes a base 1 and a first enclosure 2 for mounting on the relay. The frame also includes a top cover 3, a second enclosure 4, and an arc-initiating assembly 7 and an arc-extinguishing grid assembly 8 disposed in a high-voltage area 6.

[0043] The second enclosure 4, in conjunction with the first enclosure 2, separates the high-voltage area 6 and the low-voltage area 5 of the relay. Furthermore, in the event of an explosion in the high-voltage area, the impact is released through the corners of the upper cover 3, preventing the explosion from affecting the low-voltage area. Additionally, the arc-initiating component 7 and the arc-extinguishing grid group 8 guide the arc generated by the high-voltage module to the arc-extinguishing grid group 8 for processing, preventing the arc from burning the low-voltage module.

[0044] In some embodiments, the top cover 3 is used to cover the base 1. A second enclosure 4 is disposed inside the top cover 3, and the shape of the second enclosure 4 matches that of the first enclosure 2, dividing the interior of the top cover 3 into a low-pressure area 5 and two high-pressure areas 6, with the two high-pressure areas 6 located at two adjacent corners of the top cover 3.

[0045] When the relay and the top cover 3 are installed together, the installation position of the high voltage module corresponds to the high voltage area 6, and the installation position of the low voltage module corresponds to the low voltage area 5.

[0046] Furthermore, the strength of the first enclosure 2 and the second enclosure 4 is higher than the corner strength of the upper cover 3 corresponding to the high-pressure area 6, which is used to protect the low-pressure area 5 in the event of an explosion in the high-pressure area 6. Specifically, the structural strength of the first enclosure 2 and the upper cover 3 at the connection position of the first section 401 and the third section 403 is higher than the structural strength of the corner part of the upper cover 3.

[0047] See attached document Figure 2 and attached Figure 3The locations of low-pressure area 5 and high-pressure area 6 are such that, in the event of an explosion in the high-pressure area, the combined protection of the first enclosure 2 and the second enclosure 4 allows the impact of the explosion in high-pressure area 6 to be released through the corners of the upper cover 3. This prevents the explosion of the high-pressure module in high-pressure area 6 from affecting the low-pressure module in low-pressure area 5. This solves the problem of existing systems where the explosion of the high-pressure module renders the low-pressure module unusable.

[0048] In some embodiments, as shown in the appendix Figure 2 and attached Figure 3 As shown, the second enclosure 4 includes an integrally extended first section 401, a second section 402, and a third section 403. The first section 401 and the third section 403 are both in contact with the inner shell surface of the upper cover 3, and the second section 402 is shaped to match the central partition 202 and the side plate 201 of the first enclosure 2.

[0049] Specifically, the shape of the second segment 402 is designed to precisely match the central partition 202 and side plate 201 of the first enclosure 2 on the base. When the top cover 3 is installed with the base 1, the tight fit between the second segment 402 and the first enclosure 2 forms an enhanced double-layer protective structure, improving the safety isolation level between the high-voltage area 6 and the low-voltage area 5, and effectively blocking the damage of arc products or explosive shock waves to the low-voltage module.

[0050] In addition, this combination can also serve as an internal support point, significantly improving the mechanical stability of the relay after overall installation.

[0051] Furthermore, the two high-voltage regions 6 are separated by a third segment 403, which is used to increase the creepage distance between the two high-voltage regions 6.

[0052] Based on the increased structural strength of the third section 403, the impact of an explosion in one high-voltage area 6 on the other high-voltage area 6 was simultaneously prevented. At the same time, the creepage distance of the two high-voltage modules in the two high-voltage areas 6 was also increased.

[0053] In some embodiments, the vertical position of the second segment 402 corresponds to the position of the second mounting plate 704, so that the electric arc formed in the high-voltage region 6 can enter the arc-starting channel 9.

[0054] With the arc-initiating component 7 configured as described above, when an electric arc is generated in the high-voltage module in the high-voltage region 6, the arc can be guided to move in a regular manner along with the arc-extinguishing grid group 8, thereby guiding the arc towards the arc-extinguishing grid group 8 to process the generated arc. This prevents the arc from moving erratically towards the low-voltage region 5, which could lead to the ablation of the low-voltage module.

[0055] Specifically, the arc-initiating assembly 7 is constructed to form a pre-defined, low-magnetic-resistance arc movement path. It includes a first arc-initiating plate 701, a second arc-initiating plate 702, and a first mounting plate 703 and a second mounting plate 704 for support and positioning. The first arc-initiating plate 701 is attached to the first mounting plate 703 and is positioned close to the inner wall of the upper cover 3; while the second arc-initiating plate 702 is attached to the second mounting plate 704 and is positioned near the isolation barrier of the low-voltage area 5. These four components together form an arc-initiating channel 9 with a specific cross-section. This arc-initiating channel 9 is preferably designed to be arc-shaped.

[0056] By making the arc-initiating channel 9 arc-shaped, the path of the electric arc can be extended. Compared to a straight line, an arc shape allows the arc to be stretched longer. Simultaneously, lengthening the arc accelerates cooling and the deionization process. Furthermore, the arc shape optimizes the internal space layout of the upper cover 3, enabling more efficient use of space within a limited area.

[0057] In some embodiments, to ensure that the electric arc generated in the high-voltage region 6 can smoothly enter the arc-ignition channel 9, this embodiment provides a preferred design. The high-voltage region 6, as the source of the electric arc, is located directly opposite the entrance of the arc-ignition channel 9. Specifically, the second segment 402 of the second enclosure 4 used for isolation has its vertical position corresponding to the position of the second mounting plate 704 in the arc-ignition assembly 7, forming a guiding surface. This ensures that after the electric arc is generated, it is reliably guided by the hot airflow and enters the interior of the arc-ignition channel 9, without moving to other directions such as the low-voltage region 5, thus avoiding the risk of burning the low-voltage module.

[0058] The electric arc moves along the arc-ignition channel 9 and eventually enters the arc-extinguishing grid group 8 located at the end of the channel. The arc-extinguishing grid group 8 consists of multiple parallel metal grid plates. It cuts the single strong electric arc into multiple short electric arcs connected in series, which greatly increases the total arc voltage and cools the arc violently, so that the arc cannot reignite when it crosses zero, thus achieving the purpose of rapid and reliable extinguishing.

[0059] Arc extinction is an exothermic process that generates high-temperature gas. To handle this high-temperature gas, the lower part of the arc-extinguishing grid assembly 8 is connected to a dedicated cavity 10. The arc-ignition channel 9 forms an outlet 901 after the arc-extinguishing grid assembly 8, which leads directly to the cavity 10. When the arc is extinguished, the generated high-temperature, high-pressure gas rapidly expands through outlet 901 and enters the cavity 10.

[0060] In some embodiments, after the upper cover 3 is fitted with the base 1: a gap 11 is left between the side plate 201 of the first enclosure 2 and the middle area of ​​the second section 402, and the gap 11 is used for mutual circulation of high temperature gas in the high pressure area 6 and low temperature gas in the low pressure area 5.

[0061] Specifically, as described above, when the electric arc is extinguished, the heat enters the low-pressure region 5 through the outlet 901 and the opening. The low-temperature gas in the low-pressure region 5 flows into the arc-extinguishing grid group 8 through the gap between the side plate 201 and the second section 402, completing the mutual circulation between the high-temperature gas in the high-pressure region 6 and the low-temperature gas in the low-pressure region 5.

[0062] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0063] The framework and relay provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A frame for mounting on a relay, the frame comprising a base (1) for mounting on the relay and a first enclosure (2), characterized in that, The framework also includes: Top cover (3) for covering the base (1); The second enclosure (4) is set inside the upper cover (3). The shape of the second enclosure (4) matches that of the first enclosure (2), dividing the interior of the upper cover (3) into a low-pressure area (5) and two high-pressure areas (6). The two high-pressure areas (6) are located at two adjacent corners of the upper cover (3). The high-voltage area (6) is provided with an arc-initiating component (7) and an arc-extinguishing grid group (8). The arc-initiating component (7) and the arc-extinguishing grid group (8) are adjacent to each other. The arc-initiating component (7) is used to guide the electric arc to move in the direction of the arc-extinguishing grid group (8).

2. The framework according to claim 1, characterized in that, When the relay is installed in conjunction with the upper cover (3), the installation position of the high voltage module corresponds to the high voltage area (6), and the installation position of the low voltage module corresponds to the low voltage area (5).

3. The framework according to claim 1, characterized in that, The second enclosure (4) includes an integrally extended first section (401), a second section (402) and a third section (403). The first segment (401) and the third segment (403) are both connected to the inner shell surface of the upper cover (3), and the second segment (402) is shaped to match the middle partition (202) and side plate (201) of the first enclosure (2).

4. The frame according to claim 3, characterized in that, The structural strength of the first enclosure (2) and the top cover (3) at the connection position of the first section (401) and the third section (403) is higher than the structural strength of the corner portion of the top cover (3).

5. The framework according to claim 3, characterized in that, The two high-voltage regions (6) are separated by the third segment (403), which is used to increase the creepage distance between the two high-voltage regions (6).

6. The framework according to claim 3, characterized in that, The arc-initiating assembly (7) includes a first arc-initiating piece (701), a second arc-initiating piece (702), a first mounting plate (703), and a second mounting plate (704). The first arc-initiating piece (701) and the first mounting plate (703) are attached to each other and are located on the side close to the inner wall of the upper cover (3). The second arc-initiating piece (702) and the second mounting plate (704) are attached to each other and are located on the side close to the low-pressure area (5). The first arc-initiating piece (701), the second arc-initiating piece (702), the first mounting plate (703), and the second mounting plate (704) together form an arc-initiating channel (9), which is arc-shaped.

7. The frame according to claim 6, characterized in that, The vertical position of the second segment (402) corresponds to the position of the second mounting plate (704), which facilitates the electric arc formed in the high-voltage area (6) to enter the arc-starting channel (9).

8. The frame according to claim 7, characterized in that, The relay is also provided with a cavity (10), and the arc extinguishing grid group (8) is located on the lower side of the arc ignition channel (9). The lower side of the arc extinguishing grid group (8) is also connected to the cavity (10).

9. The framework according to claim 3, characterized in that, After the upper cover (3) and the base (1) are fitted together: a gap (11) is left between the side plate (201) of the first enclosure (2) and the middle area of ​​the second section (402), the gap (11) is used for the mutual circulation of high temperature gas in the high pressure area (6) and low temperature gas in the low pressure area (5).

10. A relay, comprising a base (1), a high-voltage module, and a low-voltage module, characterized in that, It also includes the framework as described in any one of claims 1 to 9.

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