Full-mode surge protection device for rail transit

Abstract

The utility model discloses a full-mode surge protection device for rail transit. The full-mode surge protection device comprises a bottom plate, a mounting framework, an upper shell and a full-mode protection circuit unit, a right side accommodating cavity and a left side accommodating cavity which are spaced from each other are defined in the upper shell by the mounting framework; a first pressure-sensitive element, a second pressure-sensitive element and gas discharge elements correspondingly connected with the first pressure-sensitive element and the second pressure-sensitive element in the full-mode protection circuit unit are assembled in the right side containing cavity, a third pressure-sensitive element and gas discharge elements correspondingly connected with the third pressure-sensitive element are assembled in the left side containing cavity, and the PCB is connected to the front side face of the installation framework. The tripping assembly is connected to the top of the installation framework, and the pin assembly and the remote signaling assembly are connected to the lower portion of the installation framework and penetrate through the bottom plate to extend downwards. Therefore, the full-mode surge protection device with the structure has the advantages of compact and firm structure and small volume, is more convenient to install and maintain, can meet the requirements of integral integration and volume miniaturization of a power supply, and is particularly suitable for a power supply system of rail transit.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric power lightning protection, and particularly relates to a full-mode surge protection device for rail transit. BACKGROUND

[0002] At present, urban rail transit has developed to an irreplaceable position as a main traffic tool. Generally, rail transit drives rail vehicles through a direct current power supply, and each station of the rail transit provides power for each load in the station through commercial power. When lightning overvoltage, lightning electromagnetic pulse, and abnormal mutation of supply voltage in the line occur, an electric surge (instantaneous overvoltage exceeding normal working voltage) often occurs, and the electric system and electric equipment are damaged. In order to avoid the occurrence of the above situation, a surge protection device (SPD) needs to be arranged in the power supply system of the rail transit. The on-board surge protection device avoids the large size structure of the traditional surge protection device, and can be applied to the development demand of miniaturization and refinement of equipment. In order to meet the demand of overall integration and miniaturization of the power supply, the structure of the traditional on-board surge protection device needs to be improved, so that the structure of the on-board surge protection device is more compact and the volume is reduced, thereby being beneficial to installation and maintenance. SUMMARY

[0003] Therefore, the utility model aims at providing a full-mode surge protection device for rail transit, which is compact and firm in structure, small in volume, 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 full-mode surge protection device for rail transit, comprising a bottom plate, a mounting framework and an upper shell arranged in sequence from bottom to top, and further comprising a full-mode protection circuit unit assembled on the mounting framework; the mounting framework defines a right side accommodating cavity and a left side accommodating cavity spaced from each other in the upper shell;

[0006] The full-mode protection circuit unit comprises a PCB board, a first pressure sensitive element, a second pressure sensitive element, a third pressure sensitive element, a plurality of gas discharge elements, a tripping assembly, a pin assembly and a remote signaling assembly;

[0007] The first pressure sensitive element and the second pressure sensitive element and the gas discharge elements connected therewith are assembled in the right side accommodating cavity; the third pressure sensitive element and the gas discharge elements connected therewith are assembled in the left side accommodating cavity; the PCB board is connected to the front side of the mounting framework, the tripping assembly is connected to the top of the mounting framework, and the pin assembly and the remote signaling assembly are connected to the lower part of the mounting framework and extend downward through the bottom plate.

[0008] Further, the bottom plate is provided with a first buckle member, and the bottom plate is connected with the mounting frame through the first buckle member; the mounting frame is provided with a second buckle member adjacent to the position of the bottom plate, and the upper shell is connected with the mounting frame through the second buckle member and covers the bottom plate, and the mounting frame is accommodated in the upper shell.

[0009] Further, the left side and the right side of the upper shell are respectively provided with ventilation openings for heat dissipation, and the top of the upper shell is provided with a state observation window for observing the tripping assembly.

[0010] Further, the bottom plate is provided with a first buckle member, and the bottom plate is connected with the mounting frame through the first buckle member; the mounting frame is provided with a second buckle member adjacent to the position of the bottom plate, and the upper shell is connected with the mounting frame through the second buckle member and covers the bottom plate, and the mounting frame is accommodated in the upper shell.

[0011] Further, the bottom plate is provided with a first buckle member, and the bottom plate is connected with the mounting frame through the first buckle member; the mounting frame is provided with a second buckle member adjacent to the position of the bottom plate, and the upper shell is connected with the mounting frame through the second buckle member and covers the bottom plate, and the mounting frame is accommodated in the upper shell.

[0012] The full-mode surge protection device for rail transit provided by the embodiment of the utility model, through the mounting frame, right side containing cavity and left side containing cavity are defined between the bottom plate and the upper shell, the first pressure sensitive element and the second pressure sensitive element in the full-mode protection circuit unit and the corresponding connected gas discharge element are assembled in the right side containing cavity, the third pressure sensitive element in the full-mode protection circuit unit and the corresponding connected gas discharge element are assembled in the left side containing cavity, the PCB plate in the full-mode protection circuit unit is connected on the front side of the mounting frame, the tripping assembly in the full-mode protection circuit unit is connected on the top of the mounting frame, the pin assembly and the remote signaling assembly in the full-mode protection circuit unit are connected on the low part of the mounting frame and extend downward through the bottom plate, thus, the full-mode surge protection device has the advantages of compact and firm structure, small volume, convenient installation and maintenance, can meet the demand of power supply integration and small size, and is especially suitable for power supply system of rail transit. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a perspective view of the top of the full-mode surge protection device in the utility model;

[0014] Fig. 2 It is a perspective view of the bottom of the full-mode surge protection device in the utility model;

[0015] Fig. 3 It is a structure schematic diagram of the full-mode surge protection device in the utility model without the upper shell.

[0016] Fig. 4 Figure 3 is a lateral sectional view of the full-mode surge protection device in the utility model. DETAILED DESCRIPTION

[0017] The embodiments of the utility model will be described in detail by specific examples. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. Obviously, the described embodiments are part of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0018] Although the utility model has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the utility model, 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 utility model, all belong to the scope of protection of the utility model.

[0019] The terms such as "upper", "lower", "left", "right", "middle" and the like cited in the specification are only for the convenience of clear description, not to limit the scope of the utility model that can be implemented, and the change or adjustment of the relative relationship is also regarded as the scope of the utility model that can be implemented without substantial change of technical content.

[0020] The utility model embodiment provides a kind of full-mode surge protection device for rail transit, refer to Figs. 1 to 4 The full-mode surge protection device includes bottom plate 1, installation framework 2 and upper shell 3 sequentially arranged from bottom to top, and also includes full-mode protection circuit unit assembled on the installation framework 2. The installation framework 2 defines right side accommodating cavity 21 and left side accommodating cavity 22 spaced from each other in the upper shell 3.

[0021] Specifically, the first buckle piece 11 is arranged on the bottom plate 1, and the bottom plate 1 is connected with the installation framework 2 by the first buckle piece 11. The second buckle piece 23 is arranged on the installation framework 2 adjacent to the position of the bottom plate 1, and the upper shell 3 is connected with the installation framework 2 by the second buckle piece 23 and covers on the bottom plate 1, and the installation framework 2 is accommodated in the upper shell 3 and defines the right side accommodating cavity 21 and the left side accommodating cavity 22.

[0022] Specifically, the full-mode protection circuit unit includes a PCB board 40, a first pressure-sensitive element 41, a second pressure-sensitive element 42, a third pressure-sensitive element 43, a plurality of gas discharge elements 44, a tripping assembly 45, and a pin assembly and a remote signaling assembly. It should be noted that the specific protection circuit structure formed by the mutual connection of each electrical element in the full-mode protection circuit unit can refer to the existing protection circuit scheme.

[0023] The first pressure-sensitive element 41 and the second pressure-sensitive element 42 and the gas discharge elements 44 connected thereto are assembled in the right accommodating cavity 21. The third pressure-sensitive element 43 and the gas discharge elements 44 connected thereto are assembled in the left accommodating cavity 22. The PCB board 40 is connected to the front side of the mounting skeleton 2. The tripping assembly 45 is connected to the top of the mounting skeleton 2, and the pin assembly and the remote signaling assembly are connected to the lower part of the mounting skeleton 2 and extend downward through the bottom plate 1.

[0024] The pin assembly and the remote signaling assembly are mainly used to connect the full-mode surge protection device with external circuit electrical signals. Specifically, the pin assembly includes a first metal pin 51, a second metal pin 52, a third metal pin 53, a fourth metal pin 54, and a fifth metal pin 55. The first metal pin 51 is used for electrical connection with the live wire L1, the second metal pin 52 is used for electrical connection with the live wire L2, the third metal pin 53 is used for electrical connection with the live wire L3, the fourth metal pin 54 is used for electrical connection with the neutral wire N, and the fifth metal pin 55 is used for electrical connection with the protective wire PE.

[0025] The remote signaling assembly includes a plurality of remote signaling signal pins 6. When any one of the first pressure-sensitive element 41, the second pressure-sensitive element 42, and the third pressure-sensitive element 43 is tripped from the tripping point electrically connected to the tripping assembly 45, the tripping assembly 45 performs a tripping action to protect the electrical equipment, and the corresponding warning signal is sent based on the remote signaling circuit of the remote signaling assembly.

[0026] In this embodiment, the left and right sides of the upper shell 3 are respectively provided with ventilation openings 31 for heat dissipation. The top of the upper shell 3 is provided with a state observation window 32 for observing the tripping assembly 45. Further, the bottom plate 1 is connected with a downward extending foolproof pin 12.

[0027] Based on the full-mode surge protection device provided in the above embodiment, the right side accommodating cavity 21 and the left side accommodating cavity 22 are defined by the mounting skeleton 2 between the bottom plate 1 and the upper shell 3, the first pressure sensitive element 41 and the second pressure sensitive element 42 in the full-mode protection circuit unit and the corresponding connected gas discharge element 44 are assembled in the right side accommodating cavity 21, the third pressure sensitive element 43 in the full-mode protection circuit unit and the corresponding connected gas discharge element 44 are assembled in the left side accommodating cavity 22, the PCB plate 40 in the full-mode protection circuit unit is connected on the front side of the mounting skeleton 2, the tripping assembly 45 in the full-mode protection circuit unit is connected on the top of the mounting skeleton 2, and the pin assembly and the remote signaling assembly in the full-mode protection circuit unit are connected on the low part of the mounting skeleton 2 and extend downward through the bottom plate 1, so that the full-mode surge protection device with the above structure has the advantages of compact and firm structure, small volume, convenient installation and maintenance, and can meet the demand of overall integration and small size of the power supply, and is particularly suitable for the power supply system of rail transit.

[0028] It should be noted that the above only describes the specific embodiments of the present application, and for those skilled in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A full mode surge protection device for rail transportation, characterized in that, It comprises a bottom plate (1), a mounting skeleton (2) and an upper shell (3) arranged in sequence from bottom to top, and further comprises a full-mode protection circuit unit assembled on the mounting skeleton (2); the mounting skeleton (2) defines a right side accommodating cavity (21) and a left side accommodating cavity (22) spaced from each other in the upper shell (3); The full-mode protection circuit unit comprises a PCB board (40), a first pressure sensitive element (41), a second pressure sensitive element (42), a third pressure sensitive element (43), a plurality of gas discharge elements (44), a tripping assembly (45), and a pin assembly and a remote signaling assembly; Wherein, the first pressure sensitive element (41) and the second pressure sensitive element (42) and the corresponding connected gas discharge elements (44) are assembled in the right side accommodating cavity (21); the third pressure sensitive element (43) and the corresponding connected gas discharge elements (44) are assembled in the left side accommodating cavity (22); the PCB board (40) is connected on the front side of the mounting skeleton (2), the tripping assembly (45) is connected on the top of the mounting skeleton (2), and the pin assembly and the remote signaling assembly are connected on the low part of the mounting skeleton (2) and extend downward through the bottom plate (1).

2. The full module surge protection device of claim 1, wherein, A first buckle member (11) is arranged on the bottom plate (1), and the bottom plate (1) is connected with the mounting skeleton (2) through the first buckle member (11); a second buckle member (23) is arranged on the mounting skeleton (2) adjacent to the bottom plate (1), and the upper shell (3) is connected with the mounting skeleton (2) through the second buckle member (23) and covers the bottom plate (1), and the mounting skeleton (2) is accommodated in the upper shell (3).

3. The full module surge protection device of claim 2, wherein, Ventilation openings (31) for heat dissipation are respectively arranged on the left side and the right side of the upper shell (3), and a state observation window (32) for observing the state of the tripping assembly (45) is arranged on the top of the upper shell (3).

4. The full module surge protection device of claim 2, wherein, A foolproof pin (12) extending downward is connected on the bottom plate (1).

5. The full module surge protection device of any of claims 1-4, wherein, The pin assembly comprises a first metal pin (51), a second metal pin (52), a third metal pin (53), a fourth metal pin (54) and a fifth metal pin (55), and the remote signaling assembly comprises a plurality of remote signaling signal pins (6); wherein, the first metal pin (51) is used for electrically connecting with a live wire L1, the second metal pin (52) is used for electrically connecting with a live wire L2, the third metal pin (53) is used for electrically connecting with a live wire L3, the fourth metal pin (54) is used for electrically connecting with a neutral wire N, and the fifth metal pin (55) is used for electrically connecting with a protective wire PE.

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