Three-phase PCB onboard surge protection device

Abstract

The utility model discloses a three-phase PCB (printed circuit board)-mounted surge protection device, which comprises a bottom plate, a first mounting framework, a second mounting framework and an upper shell which are sequentially arranged from bottom to top, and the first mounting framework and the second mounting framework define a first accommodating cavity and a second accommodating cavity which are mutually spaced in the upper shell. A first pressure-sensitive element and a second pressure-sensitive element which are arranged in a laminated manner are assembled in the first accommodating cavity, a third pressure-sensitive element and a gas discharge element which are arranged in a laminated manner are assembled in the second accommodating cavity, and corresponding tripping assemblies are assembled on the outer sides of the first accommodating cavity and the second accommodating cavity; the bottom plate is connected with a pin assembly and a remote signaling assembly which are used for connecting the surge protection device with an external circuit through electric signals. The surge protection device provided by the utility model has the advantages of compact and firm structure and small volume, and is more convenient to install and maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric power lightning protection, and particularly relates to a three-phase PCB board-mounted surge protection device. BACKGROUND

[0002] With the vigorous development of power electronics, in order to effectively prevent the influence of space lightning field on power grid, power and electronic equipment, people have invented many lightning surge protection devices. The board-mounted surge protector avoids the bulky structure of the traditional surge protector, and can be applied to the development demand of device miniaturization and refinement. In order to meet the demand of power supply integration and small size, the structure of the traditional board-mounted surge protector needs to be improved to make the structure of the board-mounted surge protector more compact and reduce the volume, thereby facilitating installation and maintenance. SUMMARY

[0003] Therefore, the utility model aims at providing a three-phase PCB board-mounted surge protection device which is compact and firm in structure, small in size, and convenient to install and maintain.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A three-phase PCB board-mounted surge protection device, comprising a bottom plate, a first mounting framework, a second mounting framework and an upper shell arranged in sequence from bottom to top, wherein the first mounting framework and the second mounting framework define a first accommodating cavity and a second accommodating cavity spaced from each other in the upper shell; the first accommodating cavity is assembled with a first pressure-sensitive element and a second pressure-sensitive element arranged in layers, and the second accommodating cavity is assembled with a third pressure-sensitive element and a gas discharge element arranged in layers;

[0006] The first mounting framework is assembled with a first trip-out assembly corresponding to the first pressure-sensitive element on the side away from the first accommodating cavity, the second mounting framework is assembled with a second trip-out assembly corresponding to the second pressure-sensitive element on the side away from the first accommodating cavity, and the second mounting framework is assembled with a third trip-out assembly corresponding to the third pressure-sensitive element on the side away from the second accommodating cavity;

[0007] The bottom plate is connected with a pin assembly and a remote signaling assembly for electrically connecting the surge protection device with external circuit.

[0008] Further, the bottom plate is connected with the first mounting frame through a first buckle, the bottom plate is connected with the upper shell through a second buckle, the upper shell covers the bottom plate, and the first mounting frame and the second mounting frame are accommodated in the upper shell; a protruding portion extending in the longitudinal direction is arranged on the outer side wall of the first mounting frame and the second mounting frame, a limiting groove matched with the protruding portion is arranged on the inner side wall of the upper shell, and the protruding portion is embedded in the limiting groove.

[0009] Further, the protruding portion has a through hole extending in the longitudinal direction, and the pin assembly is inserted into the through hole and extends downward from the edge of the bottom plate.

[0010] Further, the pin assembly comprises a first metal pin, a second metal pin, a third metal pin, a fourth metal pin and a fifth metal pin, and each metal pin is inserted into one through hole;

[0011] The first metal pin is electrically connected with the first pole of the first pressure-sensitive element, the second metal pin is electrically connected with the first pole of the second pressure-sensitive element, the third metal pin is electrically connected with the first pole of the third pressure-sensitive element, the fourth metal pin is electrically connected with the first pole of the gas discharge element, and the fifth metal pin is electrically connected with the second poles of the first pressure-sensitive element, the second pressure-sensitive element, the third pressure-sensitive element and the gas discharge element.

[0012] Further, the remote signaling assembly comprises a PCB board and first and second signal pins electrically connected to the PCB board, and the first signal pin is further electrically connected with the first, second and third tripping assemblies through electrical connectors.

[0013] Further, the PCB board is arranged between the bottom plate and the first mounting frame, and the first and second signal pins extend downward through the bottom plate.

[0014] The three-phase PCB-mounted surge protection device provided by the embodiment of the utility model has the advantages that the first mounting frame and the second mounting frame define the first accommodating cavity and the second accommodating cavity which are spaced from each other between the bottom plate and the upper shell, the pressure-sensitive elements and the gas discharge element are assembled in the first accommodating cavity and the second accommodating cavity, the tripping assemblies corresponding to the pressure-sensitive elements are assembled on the two sides of the first accommodating cavity and the second accommodating cavity, the pin assembly and the remote signaling assembly for electrically connecting the surge protection device with external circuits extend downward from the bottom plate, and therefore, the three-phase PCB-mounted surge protection device has the advantages of compact and firm structure and small volume, and is convenient to install and maintain. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 Figure 1 is a schematic diagram of the overall structure of a surge protection device in the present application;

[0016] Fig. 2 Figure 2 is a schematic diagram of the structure of the surge protection device in the present application after omitting the upper shell;

[0017] Fig. 3 Figure 3 is a longitudinal sectional view of the surge protection device in the present application;

[0018] Fig. 4 Figure 4 is a transverse sectional view of the upper shell in the present application. DETAILED DESCRIPTION

[0019] The embodiments of the present application will be described in detail by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0020] Although the present application has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, all fall within the scope of the present application.

[0021] The terms such as "upper", "lower", "left", "right", "middle" and the like in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship without substantial change of the technical content is also regarded as the scope of the present application.

[0022] The embodiment of the present application provides a three-phase PCB board-mounted surge protection device, referring to Figs. 1 to 4 The first mounting framework 2 and the second mounting framework 3 define a first accommodating cavity 100 and a second accommodating cavity 200 spaced from each other in the upper shell 4. The first accommodating cavity 100 is assembled with a first pressure-sensitive element 51 and a second pressure-sensitive element 52 arranged in layers, and the second accommodating cavity 200 is assembled with a third pressure-sensitive element 53 and a gas discharge element 54 arranged in layers.

[0023] The first mounting skeleton 2 is provided with a first tripping assembly 61 corresponding to the first pressure-sensitive element 51 on the side away from the first accommodating cavity 100, the second mounting skeleton 3 is provided with a second tripping assembly 62 corresponding to the second pressure-sensitive element 52 on the side away from the first accommodating cavity 100, and the second mounting skeleton 3 is provided with a third tripping assembly 63 corresponding to the third pressure-sensitive element 53 on the side away from the second accommodating cavity 200.

[0024] The bottom plate 1 is connected with a pin assembly and a remote signaling assembly for electrically connecting the surge protection device with external circuits.

[0025] Specifically, the pin assembly includes a first metal pin 71, a second metal pin 72, a third metal pin 73, a fourth metal pin 74, and a fifth metal pin 75. The first metal pin 71 is electrically connected to the first pole of the first pressure-sensitive element 51, the second metal pin 72 is electrically connected to the first pole of the second pressure-sensitive element 52, the third metal pin 73 is electrically connected to the first pole of the third pressure-sensitive element 53, the fourth metal pin 74 is electrically connected to the first pole of the gas discharge element 54, and the fifth metal pin 75 is electrically connected to the second poles of the first pressure-sensitive element 51, the second pressure-sensitive element 52, the third pressure-sensitive element 53, and the second pole of the gas discharge element 54. Thus, the pin assembly is connected with the first pressure-sensitive element 51, the second pressure-sensitive element 52, the third pressure-sensitive element 53, and the gas discharge element 54 to form a surge protection circuit.

[0026] Specifically, the remote signaling assembly includes a PCB board 81, a first signal pin 82, and a second signal pin 83 electrically connected to the PCB board 81. The first signal pin 82 is further electrically connected to the first tripping assembly 61, the second tripping assembly 62, and the third tripping assembly 63 through electrical connectors. The PCB board 81 is arranged between the bottom plate 1 and the first mounting skeleton 2, and the first signal pin 82 and the second signal pin 83 extend downward through the bottom plate 1. Thus, the PCB board 81, the first signal pin 82, the second signal pin 83, the first tripping assembly 61, the second tripping assembly 62, and the third tripping assembly 63 form a remote signaling circuit. When any one of the first tripping assembly 61, the second tripping assembly 62, and the third tripping assembly 63 trips, the remote signaling circuit sends a corresponding warning signal.

[0027] In the embodiment, the bottom plate 1 is buckled with the first mounting skeleton 2 through the first buckle 11, the bottom plate 1 is buckled with the upper shell 4 through the second buckle 12, the upper shell 4 covers the bottom plate 1, and the first mounting skeleton 2 and the second mounting skeleton 3 are accommodated in the upper shell 4.

[0028] Further, the outer side wall of the first mounting skeleton 2 and the second mounting skeleton 3 is provided with a longitudinal extending protruding part 9, the inner side wall of the upper shell 4 is provided with a limiting groove 41 matched with the protruding part 9, and the protruding part 9 is embedded in the limiting groove 41.

[0029] The protruding part 9 has a through hole 91 extending longitudinally, the pin assembly is inserted in the through hole 91 and extends downward from the edge of the bottom plate 1, and each metal pin is inserted in one through hole 91.

[0030] The three-phase PCB board-mounted surge protection device provided in the above embodiment has the advantages of compact and firm structure and small volume.

[0031] (1) The first mounting skeleton 2 and the second mounting skeleton 3 define first accommodation cavity 100 and second accommodation cavity 200 spaced from each other between the bottom plate 1 and the upper shell 4, the pressure sensitive element and the gas discharge element are assembled in the first accommodation cavity 100 and the second accommodation cavity 200, the trip assembly corresponding to the pressure sensitive element is assembled on both sides of the first accommodation cavity 100 and the second accommodation cavity 200, the pin assembly and the remote signaling assembly for connecting the surge protection device with external circuit electrical signal extend from the bottom of the bottom plate 1, and thus the three-phase PCB board-mounted surge protection device has the advantages of compact structure and small volume.

[0032] (2) The bottom plate 1, the first mounting skeleton 2 and the upper shell 4 are connected through the buckle, the outer side wall of the first mounting skeleton 2 and the second mounting skeleton 3 is provided with a longitudinal extending protruding part 9, the inner side wall of the upper shell 4 is provided with a limiting groove 41 matched with the protruding part 9, and the protruding part 9 is embedded in the limiting groove 41. Thus, the assembly structure of the surge protection device is more stable and firm.

[0033] (3) The protruding part 9 has a through hole 91 extending longitudinally, the pin assembly is inserted in the through hole 91 and extends downward from the edge of the bottom plate 1, and each metal pin is inserted in one through hole 91. Thus, the pin assembly is more stably connected, which not only facilitates the plug of the surge protection device, but also improves the stability of the electrical performance.

[0034] In summary, the three-phase PCB board-mounted surge protection device provided in the embodiment has the advantages of compact and firm structure and small volume, and is more convenient to install and maintain.

[0035] The above description is merely that of the specific embodiments of the application, and it is to be understood that numerous modifications and enhancements can be made thereto without departing from the principles of the application.

Claims

1. A three-phase PCB-based surge protection device, characterized in that, The device includes a base plate (1), a first mounting frame (2), a second mounting frame (3), and an upper shell (4) arranged sequentially from bottom to top. The first mounting frame (2) and the second mounting frame (3) define a first accommodating cavity (100) and a second accommodating cavity (200) spaced apart from each other within the upper shell (4). The first accommodating cavity (100) is equipped with a first pressure-sensitive element (51) and a second pressure-sensitive element (52) arranged in a stacked manner. The second accommodating cavity (200) is equipped with a third pressure-sensitive element (53) and a gas discharge element (54) arranged in a stacked manner. The first mounting frame (2) is equipped with a first tripping assembly (61) corresponding to the first pressure-sensitive element (51) on the side opposite to the first accommodating cavity (100), the second mounting frame (3) is equipped with a second tripping assembly (62) corresponding to the second pressure-sensitive element (52) on the side opposite to the first accommodating cavity (100), and the second mounting frame (3) is equipped with a third tripping assembly (63) corresponding to the third pressure-sensitive element (53) on the side opposite to the second accommodating cavity (200). The base plate (1) is connected to a pin assembly and a remote signaling assembly for connecting the surge protection device to an external circuit electrical signal.

2. The surge protection device according to claim 1, characterized in that, The base plate (1) is connected to the first mounting frame (2) via the first fastener (11), and the base plate (1) is connected to the upper shell (4) via the second fastener (12). The upper shell (4) covers the base plate (1), and the first mounting frame (2) and the second mounting frame (3) are housed within the upper shell (4). The outer sidewalls of the first mounting frame (2) and the second mounting frame (3) are provided with longitudinally extending protrusions (9), and the inner sidewalls of the upper shell (4) are provided with limiting grooves (41) that are adapted to the protrusions (9). The protrusions (9) are embedded in the limiting grooves (41).

3. The surge protection device according to claim 2, characterized in that, The protrusion (9) has a through hole (91) extending longitudinally, and the pin assembly is inserted into the through hole (91) and extends downward from the edge of the base plate (1).

4. The surge protection device according to claim 3, characterized in that, The pin assembly includes a first metal pin (71), a second metal pin (72), a third metal pin (73), a fourth metal pin (74), and a fifth metal pin (75), each of which is inserted into a through hole (91); The first metal pin (71) is electrically connected to the first electrode of the first pressure-sensitive element (51), the second metal pin (72) is electrically connected to the first electrode of the second pressure-sensitive element (52), the third metal pin (73) is electrically connected to the first electrode of the third pressure-sensitive element (53), the fourth metal pin (74) is electrically connected to the first electrode of the gas discharge element (54), and the fifth metal pin (75) is electrically connected to the second electrode of the first pressure-sensitive element (51), the second electrode of the second pressure-sensitive element (52), the second electrode of the third pressure-sensitive element (53), and the second electrode of the gas discharge element (54).

5. The surge protection device according to claim 2, characterized in that, The remote signaling component includes a PCB board (81) and a first signal pin (82) and a second signal pin (83) electrically connected to the PCB board (81). The first signal pin (82) is also electrically connected to the first tripping component (61), the second tripping component (62) and the third tripping component (63) respectively through an electrical connector.

6. The surge protection device according to claim 5, characterized in that, The PCB board (81) is disposed between the base plate (1) and the first mounting frame (2), and the first signal pin (82) and the second signal pin (83) extend downward through the base plate (1).

Images