A direct current surge protector

Abstract

The utility model discloses a direct current surge protector, including base, middle module and edge module, be equipped with male locating groove on the mounting groove between middle module and edge module, be equipped with single locating groove on the base outside wall of edge module outside, male locating groove and single locating groove are all arranged in the both ends of mounting groove, and the both ends of middle module and edge module have the locating piece, and the single locating groove plug connection of edge module outside locating piece, and the male locating groove plug connection of adjacent locating piece of middle module and edge module, the locating piece end face of middle module and edge module and the locating piece end face of edge module are equipped with the gap increase groove, and there is arc baffle in the gap increase groove, and there is parallel rib on the both sides of arc baffle, and the rib makes the air gap between arc baffle and locating piece and between arc baffle. Through arc baffle and air gap effectively block the arc propagation, avoid the safety accident of arc high temperature and the insulating breakdown between module, improve the security and reliability, and the adaptability is strong.

Description

Technical Field

[0001] This utility model relates to the field of surge protector technology, specifically to a DC surge protector. Background Technology

[0002] With the rapid development of power electronics technology, DC power supply systems, due to their high efficiency and stability, are widely used in key areas such as new energy power generation, rail transportation, communication base stations, and data centers. However, during operation, DC systems are highly susceptible to surge overvoltages caused by factors such as lightning strikes, switching operations, and equipment failures. If these overvoltages are not suppressed in time, they can lead to equipment malfunctions and performance degradation, or even component burnout, system paralysis, and fires. Therefore, DC surge protectors, as core components ensuring the safe operation of DC systems, have received significant attention regarding their performance and reliability.

[0003] In existing technologies, DC surge protectors typically consist of a base and multiple pluggable modules. Different surge protection specifications are achieved through the combination of these modules. This modular design facilitates later maintenance and replacement, significantly improving the practicality of the equipment. However, in practical applications, when a surge protector encounters an overvoltage surge, its internal protective components (such as varistors and gas discharge tubes) will quickly activate, conducting the overvoltage to ground. During this process, electric arcs can easily occur at the electrode connections between modules and between the modules and the base.

[0004] Compared to AC systems, electric arcs in DC systems are characterized by their longer duration and greater difficulty in extinguishing. If the arc spreads freely between modules, it can easily cause insulation breakdown between modules, leading to surge protector failure. More seriously, the high temperature generated by a continuous arc may ignite surrounding insulation materials, causing fires and other safety hazards. To address this issue, existing technologies often employ methods such as increasing insulation distance and installing simple partitions to block arc propagation, but the results are not ideal.

[0005] Specifically, traditional plug-in modules often employ a rigid fit in their positioning structure during installation, with a lack of targeted gap design between modules. This allows electric arcs to easily form conductive channels through these gaps. Furthermore, while some products incorporate partitions, the tight fit between the partitions and the positioning components makes it difficult to create an effective air insulation gap. The smooth surface of the partitions also limits their cooling and extinguishing effect on electric arcs, failing to meet the safety protection requirements of high-voltage, high-current DC systems. In addition, when multiple modules are used in combination, the electric arcs between the positioning components of adjacent modules interfere with each other, further increasing the risk of insulation failure and severely limiting the service life and operational reliability of DC surge protectors.

[0006] Therefore, optimizing the positioning structure of the plug-in module and effectively suppressing the generation and propagation of electric arcs through reasonable design of arc blocking components and air gaps has become a key technical issue for improving the safety performance of DC surge protectors, and an important direction that those skilled in the art urgently need to address. Utility Model Content

[0007] To address the shortcomings of the prior art, this utility model provides a DC surge protector.

[0008] The technical solution adopted by this utility model is: a DC surge protector, including a base and a plurality of pluggable modules that can be detachably installed in the mounting slots of the base. The pluggable modules include a middle module and a side module. A common positioning groove is provided on the mounting slot between the middle module and the side module. A single positioning groove is provided on the outer side wall of the base located outside the side module. The common positioning groove and the single positioning groove are respectively provided at both ends of the mounting slot.

[0009] Both ends of the middle module and the side module are provided with positioning pieces. The positioning piece on the outer side of the side module is inserted into a single positioning slot. The adjacent positioning pieces of the middle module and the side module are inserted into a common positioning slot. Gap-increasing grooves are provided on the end faces of the positioning pieces facing each other on the middle module and the side module, as well as on the end faces of the positioning pieces of the side module. An arc partition is provided in the gap-increasing groove. Several parallel ribs are provided on the two sides of the arc partition. The ribs create air gaps between the arc partition and the positioning piece, as well as between the arc partitions themselves.

[0010] Furthermore, the arc separator is made of modified PPS or PPA with a CTI ≥ 600V.

[0011] Furthermore, the thickness of the arc partition is 0.5-1mm, and the height of the rib is 0.5-1mm.

[0012] Furthermore, both the male positioning groove and the single positioning groove are composed of a vertical groove on the side wall of the mounting groove and a horizontal groove on the bottom wall of the mounting groove, and the positioning piece is composed of a vertical piece adapted to the vertical groove and a horizontal piece adapted to the horizontal groove.

[0013] Furthermore, positioning grooves are provided at both ends of the bottom wall of the mounting groove.

[0014] Furthermore, directional grooves are provided at both ends of the bottom wall of the mounting groove.

[0015] The beneficial effects of this utility model are:

[0016] I. Significantly Enhanced Arc Interception Capability: Arc baffles are installed within the gap-increasing grooves on the positioning plate end faces of the middle and side modules, as well as on the positioning plate end faces of the side modules. Ribs on both sides of the arc baffles create air gaps between the arc baffles and the positioning plates, and between the arc baffles themselves. These air gaps, working in conjunction with the arc baffles, effectively isolate, cool, and extinguish the arc generated during surge impacts, contributing to increased arc extinguishing effect and creepage distance, thus improving the safety protection performance of the surge protector in high-voltage, high-current DC systems.

[0017] II. Optimized Module Positioning Structure: The male and female positioning slots are located at opposite ends of the mounting slot. The positioning pieces of the middle and side modules interlock with their corresponding positioning slots. This positioning method ensures more precise and secure installation of the modules within the base mounting slot. The stability of the connection between adjacent modules and between the modules and the base is enhanced, reducing contact problems caused by loose installation and ensuring the surge protector's stable performance during long-term operation.

[0018] III. Ingenious Structural Design and Strong Adaptability. The inclusion of gap-increasing grooves, arc-blocking plates, and ribs achieves arc-breaking functionality without excessively increasing the overall size and weight of the surge protector, allowing the product to better adapt to different installation environments. Furthermore, this structural design offers excellent compatibility with different specifications of center and side modules. Through combinations of different modules, diverse surge protection needs can be met, enhancing the product's applicability in various DC power supply scenarios such as new energy power generation, rail transit, and communication base stations.

[0019] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 for Figure 1 A magnified schematic diagram is shown in section A.

[0023] Figure 3 This is a structural diagram of the base.

[0024] Figure 4 This is a schematic diagram of the pluggable module.

[0025] Figure 1-4In the middle: 1. Base; 2. Middle module; 3. Side module; 4. Male positioning groove; 5. Single positioning groove; 6. Positioning piece; 7. Gap-increasing groove; 8. Arc partition; 9. Rib; 10. Air gap; 11. Vertical groove; 12. Horizontal groove group; 13. Vertical piece; 14. Horizontal piece; 15. Positioning groove; 16. Orientation groove; 17. Mounting groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] This utility model provides a DC surge protector.

[0029] In this embodiment, refer to Figure 1-4 The DC surge protector includes a base 1 and multiple pluggable modules that can be detachably installed in the mounting slots 17 of the base. Each pluggable module includes a middle module 2 and a side module 3. A common positioning slot 4 is provided on the mounting slot between the middle module 2 and the side module 3. A single positioning slot 5 is provided on the outer wall of the base located outside the side module. The common positioning slot and the single positioning slot are respectively located at both ends of the mounting slot.

[0030] Both ends of the middle module and the side module are provided with positioning pieces 6. The positioning piece 6 on the outer side of the side module is inserted into a single positioning slot. The adjacent positioning pieces of the middle module and the side module are inserted into a common positioning slot. Gap-increasing grooves 7 are provided on the end faces of the positioning pieces facing each other on the middle module and the side module, as well as on the end faces of the positioning pieces of the side module. An arc baffle 8 is provided in the gap-increasing groove. Several parallel ribs 9 are provided on the two sides of the arc baffle 8. The ribs 9 form air gaps 10 between the arc baffle and the positioning piece, and between the arc baffles themselves.

[0031] In the above technical solution, the pluggable module is divided into a middle module and a side module. The common and single positioning slots on the base are used to engage with the positioning plates at both ends of the module, achieving precise positioning and installation. Simultaneously, a ribbed arc baffle is installed within the clearance-increasing groove on the end face of the positioning plate. The ribs create an air gap, improving the creepage distance.

[0032] It enables convenient disassembly and stable positioning of modules, effectively blocks arc propagation, avoids insulation breakdown between modules and safety accidents caused by high temperature of arc, improves the safety and reliability of surge protectors, and retains the maintenance convenience of modular design.

[0033] Specifically, the arc separator is made of modified PPS or PPA with a CTI ≥ 600V.

[0034] In this embodiment, the arc separator is made of modified PPS or PPA with a CTI ≥ 600V, exhibiting excellent resistance to arc ignition and tracking. Under the high temperature and electric field conditions generated by the arc, this material is not easily ignited by the arc and maintains stable insulation performance.

[0035] Specifically, the thickness of the arc partition is 0.5-1mm, and the height of the rib is 0.5-1mm.

[0036] In this embodiment, the thickness of the arc barrier is set to 0.5-1mm, which ensures sufficient structural strength to withstand arc impact without excessively increasing the module volume. The rib height is 0.5-1mm, creating a moderate air gap that effectively blocks the arc using air insulation properties while ensuring reasonable arrangement within the limited installation space. This avoids insufficient insulation due to too small a gap or affecting the module's compactness due to too large a gap.

[0037] Specifically, both the male positioning groove and the single positioning groove are composed of a vertical groove 11 on the side wall of the mounting groove and a horizontal groove 12 on the bottom wall of the mounting groove, and the positioning piece is composed of a vertical piece 13 adapted to the vertical groove and a horizontal piece 14 adapted to the horizontal groove.

[0038] In this embodiment, the positioning groove and the single positioning groove are composed of vertical grooves and horizontal grooves, and the positioning piece is composed of vertical piece and horizontal piece. The positioning groove and the positioning piece as a whole have an "L" shaped structure, which enhances the connection stability between the module and the base.

[0039] Specifically, positioning grooves 5 are provided at both ends of the bottom wall of the mounting groove.

[0040] In this embodiment, positioning grooves are provided at both ends of the bottom wall of the mounting groove, which cooperate with the corresponding structure at the bottom of the module to provide additional positioning of the module from the bottom. These positioning grooves restrict the rotation and horizontal displacement of the module within the bottom wall plane, and cooperate with the positioning plates at both ends to form multi-directional positioning.

[0041] Specifically, directional grooves 16 are provided at both ends of the bottom wall of the mounting groove.

[0042] In this embodiment, the directional grooves at both ends of the bottom wall of the mounting groove cooperate with the directional structure at the bottom of the module to guide the module during installation and prevent the module from being reversed.

[0043] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A DC surge protector, comprising a base and a plurality of pluggable modules detachably mounted in mounting slots within the base, characterized in that: The plug-in module includes a middle module and a side module. A common positioning groove is provided on the mounting groove between the middle module and the side module, and a single positioning groove is provided on the outer wall of the base located outside the side module. The common positioning groove and the single positioning groove are respectively located at both ends of the mounting groove. Both ends of the middle module and the side module are provided with positioning pieces. The positioning piece on the outer side of the side module is inserted into a single positioning slot. The adjacent positioning pieces of the middle module and the side module are inserted into a common positioning slot. Gap-increasing grooves are provided on the end faces of the positioning pieces facing each other on the middle module and the side module, as well as on the end faces of the positioning pieces of the side module. An arc partition is provided in the gap-increasing groove. Several parallel ribs are provided on the two sides of the arc partition. The ribs create air gaps between the arc partition and the positioning piece, as well as between the arc partitions themselves.

2. The DC surge protector according to claim 1, characterized in that: The arc separator is made of modified PPS or PPA with a CTI ≥ 600V.

3. The DC surge protector according to claim 1, characterized in that: The thickness of the arc partition is 0.5-1mm, and the height of the rib is 0.5-1mm.

4. The DC surge protector according to claim 1, characterized in that: Both the male positioning groove and the single positioning groove are composed of a vertical groove on the side wall of the mounting groove and a horizontal groove on the bottom wall of the mounting groove. The positioning piece is composed of a vertical piece that matches the vertical groove and a horizontal piece that matches the horizontal groove.

5. The DC surge protector according to claim 1, characterized in that: Positioning grooves are provided at both ends of the bottom wall of the mounting groove.

6. The DC surge protector according to claim 1, characterized in that: Orientation grooves are provided at both ends of the bottom wall of the mounting groove.

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