Lightning arrester tripping device for preventing miswelding and lightning arrester

Abstract

The utility model discloses a lightning protection device tripping device and lightning protection device of preventing miswelding, relate to lightning protection equipment technical field, including the casing, static contact, fixedly set up on the protector of lightning protection module, including the installation surface and with non installation surface opposite of installation surface, moving contact, with one pin connection of lightning protection module can revolve around one fixed axle on casing, to do relative motion of static contact, realize contact or separate, the installation surface of moving contact with static contact is fixed by soldering spot welding, elastic drive part, set up in casing, be used to provide the drive force of moving contact and static contact separation, limiting piece, set up in casing, set in one side of moving contact, form the rotary limit to moving contact, prevent moving contact from rotating to the position of non installation surface contact with static contact, thereby can prevent moving contact and static contact from being wrongly installed in tripping device and cause tripping function failure.

Description

Technical Field

[0001] This utility model relates to the field of lightning protection equipment technology, and in particular to a lightning arrester tripping device and a lightning arrester to prevent accidental welding. Background Technology

[0002] In low-voltage power supply systems, surge protectors, also known as lightning arresters or surge surge shields, are critical safety components that protect electrical equipment from direct lightning strikes, induced lightning strikes, and operational overvoltage damage. Among these, surge protectors based on varistors or TVS devices are the most widely used. During long-term operation, these surge protectors gradually age due to repeated surge impacts, or their core components can experience a rapid temperature increase when encountering exceptionally strong lightning currents. To prevent serious safety accidents such as device breakdown or even fire due to overheating, these surge protectors are typically equipped with a crucial safety mechanism: a tripping device.

[0003] The core working mechanism of this tripping device relies on a carefully designed thermal response element. Specifically, the device contains a solder joint made of a special low-temperature solder, which is located at a critical connection point in the current path. During normal operation of the surge protector, this solder joint remains solid, reliably connecting the circuit. Once the surge protector's internal temperature rises to the specific melting point of the low-temperature solder due to aging or overload, the solder joint melts rapidly. At this point, the mechanical energy pre-stored by an energy storage mechanism, such as a spring under tension or compression, is released. This released energy drives a movable mechanical component, typically called a moving contact, to rapidly separate from the fixed stationary contact, thereby forcibly severing the electrical connection between the surge protector and the main circuit, isolating the faulty module from the system, effectively preventing further temperature increases, and avoiding more serious fire risks.

[0004] However, while the thermal tripping principle based on the melting of low-temperature solder joints is effective, a significant safety hazard lurks in the specific implementation of existing technologies. This hazard stems from the assembly process of the tripping device. The reliable operation of the tripping function highly depends on the absolute correctness of the relative positions of the moving and stationary contacts. The movement path of the moving contact after the solder joint melts must be unobstructed to ensure smooth disengagement under spring drive. In actual production or maintenance assembly, if the operator inadvertently reverses the installation positions of the moving and stationary contacts, the stationary contact will obstruct the movement of the moving contact. In this situation, even if the surge protector overheats and causes the low-temperature solder joint to melt as expected, and the spring begins to actuate, attempting to push the moving contact apart, its trajectory will be immediately blocked by the incorrectly positioned stationary contact. The moving contact cannot complete the expected disengagement stroke, and the tripping action fails. The direct consequence is that the faulty surge protector, which is not disconnected from the circuit in time, will continue to carry current and generate more heat. The temperature will rise rapidly and out of control, and may eventually cause a combustion accident due to heat accumulation. As a result, the tripping device, which was originally designed to ensure safety, will completely fail due to its own assembly error, and instead constitute a new safety risk. Utility Model Content

[0005] The technical problem to be solved by this utility model embodiment is: how to prevent the tripping function from failing due to incorrect installation of the moving contact and stationary contact in the tripping device.

[0006] To address the aforementioned problems, in a first aspect, this utility model provides a surge protector tripping device to prevent mis-soldering, wherein the surge protector includes a surge protection module, and the surge protector tripping device to prevent mis-soldering includes:

[0007] case;

[0008] A stationary contact piece is fixedly mounted on the protective device of the surge protection module, including a mounting surface and a non-mounting surface opposite to the mounting surface;

[0009] The moving contact is connected to one pin of the surge protection module and can rotate around a fixed axis on the housing to move relative to the stationary contact, thereby achieving contact or separation; the mounting surfaces of the moving contact and the stationary contact are fixed by soldering.

[0010] An elastic drive component is disposed in the housing and configured to drive the moving contact to separate from the stationary contact in a direction away from the mounting surface after the solder point melts;

[0011] A limiting member is provided in the housing and on one side of the moving contact piece to limit the rotation of the moving contact piece, so as to prevent the moving contact piece from rotating to a position that contacts the non-mounting surface of the stationary contact piece.

[0012] A further technical solution is that the elastic drive component includes an elastic element and an indicator element. One end of the elastic element is fixed, and the other end of the elastic element is connected to the indicator element. The indicator element is rotatably connected to the housing and abuts against the moving contact piece under the elastic force of the elastic element.

[0013] A further technical solution is that the indicator is provided with a protrusion, which abuts against the movable contact piece.

[0014] A further technical solution is that the limiting member is integrally formed with the shell.

[0015] A further technical solution is that the limiting component is a limiting block.

[0016] A further technical solution is that the elastic element is a spring.

[0017] Secondly, this utility model provides a surge protector, including a surge protector tripping device as described in the first aspect to prevent mis-soldering.

[0018] Compared with the prior art, the technical effects achieved by the embodiments of this utility model include:

[0019] This utility model provides a surge arrester tripping device to prevent mis-soldering, comprising a housing; a stationary contact fixedly disposed in the housing, including a mounting surface and a non-mounting surface opposite to the mounting surface; a movable contact rotatably connected to the housing and capable of moving relative to the stationary contact to achieve contact or separation; the movable contact and the mounting surface of the stationary contact are fixed by soldering; an elastic driving component disposed in the housing and configured to drive the movable contact to separate from the stationary contact in a direction away from the mounting surface after the solder melts; and a limiting component disposed in the housing on one side of the movable contact to limit the rotation of the movable contact and prevent the movable contact from rotating to a position that contacts the non-mounting surface of the stationary contact. This utility model, by adding a limiting component, physically prevents the movable contact from being installed in the wrong position during the assembly stage, fundamentally eliminating the risk of tripping failure caused by mis-soldering of the movable contact. This design ensures that the moving contact and the stationary contact are in the correct relative position, so that when the solder melts, the elastic drive component can drive the moving contact to reliably separate without obstruction, thus ensuring the reliability of the tripping function. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0023] Figure 1 This is a schematic diagram of the structure of a surge arrester tripping device for preventing accidental welding, as proposed in an embodiment of this utility model.

[0024] Figure Labels

[0025] 10. Elastic element, 11. Indicator element, 12. Limiting element, 13. Static contact piece, 14. Solder point, 15. Moving contact piece, 16. Connecting wire, 17. Mounting surface, 18. Non-mounting surface, 19. Protrusion, 20. Housing. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0028] It should also be understood that the terminology used in this specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in this specification of embodiments of the present invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0029] See Figure 1This utility model provides a surge protector tripping device to prevent mis-soldering. The surge protector includes a surge protection module, and the number of surge protection modules can be one or more; this utility model does not specifically limit the number. The surge protector tripping device to prevent mis-soldering includes: a housing 20, a stationary contact 13, a moving contact 15, an elastic driving component, and a limiting component 12. The specific structure is described below:

[0030] The stationary contact 13 is fixedly mounted on the protective device (such as a varistor or TVS device) of the surge protection module, including a mounting surface 17 and a non-mounting surface 18 opposite to the mounting surface 17. When the moving contact 15 is fixed to the mounting surface 17, the stationary contact 13 will not restrict the movement of the moving contact 15 during tripping; conversely, when the moving contact 15 is fixed to the non-mounting surface 18, the stationary contact 13 will restrict the movement of the moving contact 15 during tripping, causing tripping failure.

[0031] The moving contact 15 is connected to a pin of the surge protector module and can rotate around a fixed axis on the housing 20 to move relative to the stationary contact 13, achieving contact or separation. The mounting surfaces 17 of the moving contact 15 and the stationary contact 13 are soldered together at solder points 14. Understandably, the moving contact 15 and the stationary contact 13 are connected to a protective device (varistor or TVS device) to form a conductive circuit. When the moving contact 15 and the stationary contact 13 detach, the conductive circuit of the protective device is broken, thereby improving safety. Understandably, the moving contact 15 can be connected to a pin of the surge protector via a connecting wire 16, and is electrically connected to the protective device through this pin. The stationary contact 13 is fixedly mounted on the protective device of the surge protector module and is electrically connected to the protective device.

[0032] An elastic drive component is disposed on the housing 20 and configured to drive the moving contact 15 to separate from the stationary contact 13 in a direction away from the mounting surface 17 after the solder joint 14 melts. The solder joint 14 is a low-temperature solder joint that can melt at a temperature of approximately 150°C.

[0033] A limiting member 12 is disposed on one side of the moving contact piece 15 within the housing 20, thereby limiting its rotation and preventing it from rotating to a position that contacts the non-mounting surface 18 of the stationary contact piece 13. As a pre-set, insurmountable physical boundary, the limiting member 12 directly intervenes and prevents the moving contact piece 15 from rotating to a position that contacts the non-mounting surface 18 of the stationary contact piece 13 or forms an incorrect welding relationship. This means that before final welding and fixing, any attempt to install the moving contact piece 15 in an incorrect orientation, such as reversed or misaligned, will be impossible due to the rigid obstruction of the limiting member 12. For example, see... Figure 1In this embodiment, the limiting member 12 is located on the left side of the movable contact piece 15. When the movable contact piece 15 rotates to a position that contacts the mounting surface 17 of the stationary contact piece 13, the limiting member 12 just contacts the movable contact piece 15, thereby restricting the movable contact piece 15 from continuing to rotate clockwise to contact the non-mounting surface 18 of the stationary contact piece 13.

[0034] In some preferred embodiments, the elastic drive component includes an elastic element 10 and an indicator 11. One end of the elastic element 10 is fixed, and the other end of the elastic element 10 is connected to the indicator 11. The indicator 11 is rotatably connected to the housing 20 and abuts against the movable contact piece 15 under the elastic force of the elastic element 10.

[0035] In practice, the indicator 11 is rotatably connected to the housing 20, and the elastic element 10 provides elastic force to keep it in contact with the moving contact 15 at all times. This configuration creates a highly efficient lever transmission system. When the solder joint 14 is secure, the holding force generated by the solder joint is much greater than the elastic force of the elastic element 10, and the entire mechanism remains stable. Once the solder joint 14 melts, its constraint force on the moving contact 15 disappears instantly. At this time, the potential energy stored in the elastic element 10 is rapidly released and converted into kinetic energy acting on the indicator 11, forcing the indicator 11 to rotate around its axis. Since the indicator 11 and the moving contact 15 are in contact, the rotational motion of the indicator 11 is directly and effectively converted into a pushing force on the moving contact 15, driving the moving contact 15 to rotate around its own axis in the direction of separation from the stationary contact 13, thus achieving disengagement.

[0036] In some preferred embodiments, the indicator 11 is provided with a protrusion 19, which abuts against the movable contact piece 15.

[0037] Specifically, the main body of the indicator 11 is elongated, and a protrusion 19 protrudes from the middle of the indicator 11 and abuts against the movable contact piece 15. The protrusion 19 serves to reliably contact the movable contact piece 15 and reliably apply force.

[0038] In some preferred embodiments, the limiting member 12 is integrally formed with the housing 20.

[0039] Specifically, the limiting member 12 is integrally formed with the housing 20, which improves the connection strength of the limiting member 12, thereby achieving reliable limiting and reducing assembly complexity.

[0040] In some preferred embodiments, the limiting member 12 is a limiting block.

[0041] Specifically, one side of the limiting block forms a surface contact with the stationary contact piece 13, thereby achieving reliable limiting.

[0042] In some preferred embodiments, the elastic element 10 is a spring.

[0043] Specifically, the spring provides reliable elasticity, thereby ensuring the reliability of the tripping device.

[0044] This utility model embodiment proposes a surge protector tripping device to prevent mis-soldering, including a housing 20; a stationary contact 13, fixedly disposed on the protective device of the surge protector module, including a mounting surface 17 and a non-mounting surface 18 opposite to the mounting surface 17; a movable contact 15 connected to a pin of the surge protector module and capable of rotating around a fixed axis on the housing 20 to move relative to the stationary contact 13, thereby achieving contact or separation; the movable contact 15 and the mounting surface 17 of the stationary contact 13 are fixedly soldered together by a solder joint 14; an elastic drive component is disposed on the housing 20 and configured to drive the movable contact 15 to separate from the stationary contact 13 in a direction away from the mounting surface 17 after the solder joint 14 melts; a limiting member 12 is disposed on the housing 20, located on one side of the movable contact 15, to limit the rotation of the movable contact 15, thereby preventing the movable contact 15 from rotating to a position that contacts the non-mounting surface 18 of the stationary contact 13. This invention, by adding a limiting component 12, physically prevents the moving contact 15 from being installed in the wrong position during the assembly stage, fundamentally eliminating the risk of tripping failure caused by missoldering of the moving contact 15. This design ensures that the moving contact 15 and the stationary contact 13 can only be in the correct relative position, so that when the solder joint 14 melts, the elastic drive component can drive the moving contact 15 to reliably separate without obstruction, ensuring the reliability of the tripping function.

[0045] This utility model provides a surge protector, including a surge protector tripping device for preventing mis-soldering as described in any of the above embodiments.

[0046] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0047] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0052] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0053] The above description describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A surge protector tripping device to prevent accidental soldering, characterized in that, The surge protector includes a surge protection module, and the surge protector tripping device for preventing mis-soldering includes: case; A stationary contact piece is fixedly mounted on the protective device of the surge protection module, including a mounting surface and a non-mounting surface opposite to the mounting surface; The moving contact is connected to one pin of the surge protection module and can rotate around a fixed axis on the housing to move relative to the stationary contact, thereby achieving contact or separation; the mounting surfaces of the moving contact and the stationary contact are fixed by soldering. An elastic drive component is disposed in the housing and configured to drive the moving contact to separate from the stationary contact in a direction away from the mounting surface after the solder point melts; A limiting member is provided in the housing and on one side of the moving contact piece to limit the rotation of the moving contact piece, so as to prevent the moving contact piece from rotating to a position that contacts the non-mounting surface of the stationary contact piece.

2. The surge arrester tripping device for preventing mis-soldering according to claim 1, characterized in that, The elastic drive component includes an elastic element and an indicator element. One end of the elastic element is fixed, and the other end of the elastic element is connected to the indicator element. The indicator element is rotatably connected to the housing and abuts against the moving contact piece under the elastic force of the elastic element.

3. The surge arrester tripping device for preventing mis-soldering according to claim 2, characterized in that, The indicator has a protrusion that abuts against the movable contact piece.

4. The surge arrester tripping device for preventing mis-soldering according to claim 1, characterized in that, The limiting component is integrally formed with the housing.

5. The surge arrester tripping device for preventing mis-soldering according to claim 1, characterized in that, The limiting component is a limiting block.

6. The surge arrester tripping device for preventing mis-soldering according to claim 2, characterized in that, The elastic element is a spring.

7. A surge protector, characterized in that, Includes the surge arrester tripping device for preventing mis-soldering as described in any one of claims 1-6.

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