Direct-current power supply high-voltage live plug mechanism

Abstract

This invention relates to a DC power supply high-voltage live plug-in mechanism, comprising a DC power supply module and a plug-in module. The DC power supply module includes a housing, within which a voltage conversion circuit is disposed. A plug assembly is disposed on the rear side of the housing. The plug assembly includes a first compartment fixed to the housing, comprising a first high-voltage compartment, a first low-voltage compartment, and a first control compartment. The first high-voltage compartment, the first low-voltage compartment, and the first control compartment are respectively provided with a first high-voltage input terminal, a first low-voltage output terminal, and a first control signal terminal. The plug-in module includes a bracket and a socket assembly. The socket assembly includes a second compartment mounted on the bracket, comprising a second high-voltage compartment, a second low-voltage compartment, and a second control compartment. The second high-voltage compartment, the second low-voltage compartment, and the second control compartment are respectively provided with a second high-voltage input terminal, a second low-voltage output terminal, and a second control signal terminal. It has the advantages of simple structure, convenient operation, and safety and reliability.

Description

Technical Field

[0001] This invention relates to hot-swap technology, and more specifically to a hot-swap mechanism for a DC power supply under high voltage and energized conditions. Background Technology

[0002] In the aerospace field, DC regulated power supplies are power distribution equipment in the ground power supply and distribution system of launch platforms. Their main function is to convert high-voltage DC power into 28V low-voltage DC power to supply power to equipment on the low-voltage bus. DC regulated power supplies typically use multiple power modules connected in parallel to achieve automatic current sharing and improve the stability and reliability of power supply and distribution. However, existing DC regulated power supplies usually use external cables directly connected to the power modules. When a power module fails, automatic fault isolation cannot be achieved. The power supply to the corresponding high-voltage bus must be shut down before the faulty power module can be removed and replaced. This process is not only cumbersome and inefficient but also poses certain dangers to operators, resulting in poor safety. Summary of the Invention

[0003] The purpose of this invention is to provide a DC power supply high-voltage live plug-in mechanism, which has the advantages of simple structure, convenient operation, safety and reliability, and high degree of standardization.

[0004] To address the aforementioned problems in the prior art, this invention provides a DC power supply high-voltage live plug-in mechanism, comprising a DC power supply module and a plug-in module. The DC power supply module includes a housing that slides with a distribution cabinet, a voltage conversion circuit is provided in the housing, and a plug assembly is provided on the rear side of the housing. The plug assembly includes a first compartment fixed to the housing, the first compartment including a first high-voltage compartment, a first low-voltage compartment, and a first control compartment. The first high-voltage compartment, the first low-voltage compartment, and the first control compartment are respectively provided with a first high-voltage input terminal, a first low-voltage output terminal, and a first control signal terminal connected to the voltage conversion circuit. The plug-in module includes a bracket and a socket assembly. The bracket is fixed to the distribution cabinet, and the socket assembly includes a second compartment mounted on the bracket. The second compartment includes a second high-voltage compartment, a second low-voltage compartment, and a second control compartment that correspond to the first high-voltage compartment, the first low-voltage compartment, and the first control compartment. The second high-voltage compartment is provided with a second high-voltage input terminal that plugs into the first high-voltage input terminal, the second low-voltage compartment is provided with a second low-voltage output terminal that plugs into the first low-voltage output terminal, and the second control compartment is provided with a second control signal terminal that plugs into the first control signal terminal.

[0005] Furthermore, the present invention provides a DC power supply high-voltage live plug-in mechanism, wherein the housing includes an integrally connected left side plate, front side plate, right side plate, rear side plate, and supporting heat sink plate. A detachable cover plate is fixed to the upper side of the left side plate, front side plate, right side plate, and rear side plate. The supporting heat sink plate is located in the middle of the left side plate and right side plate in the vertical direction, and the front side plate and rear side plate are located above the supporting heat sink plate. The lower side of the supporting heat sink plate is provided with heat dissipation teeth integrally distributed with it at left-right intervals. The rear side plate is provided with holes for installing a first compartment. The voltage conversion circuit is mounted on the supporting heat sink plate.

[0006] Furthermore, the present invention provides a DC power supply high-voltage live plug-in mechanism, wherein axial flow fans facing the heat dissipation teeth are installed at the front ends of the left and right side plates, and the heat dissipation teeth are flush with the bottom of the left and right side plates.

[0007] Furthermore, the present invention provides a DC power supply high-voltage live plug-in mechanism, wherein multiple axial flow fans are arranged side by side, and ear plates are respectively provided on the outer front end of the left and right side plates, and push-pull handles are fixed on the front side of the ear plates.

[0008] Furthermore, the present invention provides a DC power supply high-voltage live plugging and unplugging mechanism, wherein a sealing ring is provided between the cover plate and the left side plate, the front side plate, the right side plate and the rear side plate, and a sealing gasket is provided between the first compartment body and the rear side plate.

[0009] Furthermore, the present invention provides a DC power supply high-voltage live plug-in mechanism, wherein the distribution cabinet has left and right spaced limit blocks on the layered partition, and a guide groove is formed between adjacent limit blocks. The housing of the DC power supply module is located in the guide groove, and the plug-in module bracket is fixed on the layered partition at the rear end of the guide groove.

[0010] Furthermore, the present invention provides a DC power supply high-voltage live plug-in mechanism, wherein the rear ends of the left side plate and the right side plate are respectively fixed with rearward positioning pins, the ends of the positioning pins are tapered, and the length of the positioning pins is greater than the length of the first high-voltage input terminal, the first low-voltage output terminal and the first control signal terminal, and the bracket is provided with positioning holes that cooperate with the positioning pins.

[0011] Furthermore, the present invention provides a DC power supply high-voltage live plug-in mechanism, wherein the bracket is provided with a slot for mounting a second compartment, and threaded holes are provided on the left and right sides of the slot, the second compartment is located in the slot, and a gap is provided between the second compartment and the peripheral wall of the slot, and mounting holes corresponding to the threaded holes are provided on the left and right front ends of the second compartment, and connecting screws screwed into the threaded holes are provided in the mounting holes, the diameter of the connecting screws being smaller than the inner diameter of the mounting holes.

[0012] Furthermore, the present invention provides a DC power supply high-voltage live plug-in mechanism, wherein the bracket is provided with ventilation holes spaced apart on the lower side of the slot, and the bracket is provided with a third high-voltage compartment, a third low-voltage compartment, and a third control compartment on the rear side of the slot, corresponding to the second high-voltage compartment, the second low-voltage compartment, and the second control compartment.

[0013] Furthermore, the present invention provides a DC power supply high-voltage live plug-in mechanism, wherein the first high-voltage chamber is provided with a first pre-charge terminal, the length of the first pre-charge terminal is greater than the length of the first high-voltage input terminal, the first pre-charge terminal is connected to a first pre-charge circuit, the second high-voltage chamber is provided with a second pre-charge terminal that is plugged into the first pre-charge terminal, the second pre-charge terminal is connected to a second pre-charge circuit; the ear plate is provided with a fixing hole.

[0014] Compared with the prior art, the DC power supply high-voltage live plug-in mechanism of the present invention has the following advantages: The present invention sets up a DC power supply module and a plug-in module; the DC power supply module is set in a housing that slides with the distribution cabinet, a voltage conversion circuit is set in the housing, a plug assembly is set on the rear side of the housing, and the plug assembly is set in a first compartment fixed on the housing. The first compartment includes a first high-voltage compartment, a first low-voltage compartment and a first control compartment. A first high-voltage input terminal, a first low-voltage output terminal and a first control signal terminal connected to the voltage conversion circuit are correspondingly set in the first high-voltage compartment, the first low-voltage compartment and the first control compartment; the plug-in module is set with a bracket and a socket assembly, the bracket is fixed on the distribution cabinet, and the socket assembly is set in a second compartment mounted on the bracket. The second compartment includes a second high-voltage compartment, a second low-voltage compartment and a second control compartment that cooperate with the first high-voltage compartment, the first low-voltage compartment and the first control compartment. A second high-voltage input terminal that plugs into the first high-voltage input terminal is set in the second high-voltage compartment, a second low-voltage output terminal that plugs into the first low-voltage output terminal is set in the second low-voltage compartment, and a second control signal terminal that plugs into the first control signal terminal is set in the second control compartment. This results in a simple, easy-to-operate, safe, reliable, and highly standardized DC power supply high-voltage live plug-in mechanism. In practical applications, the high-voltage DC input bus, low-voltage DC output bus, and control signal line are connected to the rear ends of the second high-voltage input terminal, the second low-voltage output terminal, and the second control signal terminal, respectively. When the DC power module is plugged into the socket assembly, the high-voltage DC power is converted to low-voltage DC power through a voltage conversion circuit and then supplies power to the equipment through the low-voltage DC output bus. In a DC regulated power supply system composed of multiple DC power modules connected in parallel, if one DC power module fails, it can be directly removed and replaced with a new one without affecting the normal operation and power supply of other DC power modules. This achieves automatic fault isolation and rapid replacement of DC power modules under high-voltage live conditions. Compared with existing technologies, this simplifies the operation process, improves efficiency, and eliminates the need for cable disassembly, thus enhancing the safety of equipment and personnel.

[0015] The following detailed description of a DC power supply high-voltage live plug-in mechanism, with reference to the accompanying drawings, illustrates the specific embodiments of the present invention. Attached Figure Description

[0016] Figure 1 This is a front view of a DC power supply high-voltage live plug-in mechanism according to the present invention;

[0017] Figure 2 This is a top view of a DC power supply high-voltage live plug-in mechanism according to the present invention;

[0018] Figure 3 The isometric view of a DC power supply high-voltage live plug-in mechanism according to the present invention Figure 1;

[0019] Figure 4 The isometric view of a DC power supply high-voltage live plug-in mechanism according to the present invention Figure 2 ;

[0020] Figure 5 This is an isometric view of the layered partition of the motor cabinet in a DC power supply high-voltage live plug-in mechanism of the present invention;

[0021] Figure 6 The isometric view of the DC power module in the DC power supply high-voltage live plug-in mechanism of the present invention. Figure 1 ;

[0022] Figure 7 The isometric view of the DC power module in the DC power supply high-voltage live plug-in mechanism of the present invention. Figure 2 ;

[0023] Figure 8 The explosion of the housing in a DC power supply high-voltage live plug-in mechanism according to the present invention. Figure 1 ;

[0024] Figure 9 The explosion of the housing in a DC power supply high-voltage live plug-in mechanism according to the present invention. Figure 2 ;

[0025] Figure 10 This invention relates to an isometric view of the plug assembly in a DC power supply high-voltage live plugging / unplugging mechanism. Figure 1 ;

[0026] Figure 11 This invention relates to an isometric view of the plug assembly in a DC power supply high-voltage live plugging / unplugging mechanism. Figure 2 ;

[0027] Figure 12 This invention relates to an isometric view of a socket assembly in a DC power supply high-voltage live plugging / unplugging mechanism. Figure 1 ;

[0028] Figure 13 This invention relates to an isometric view of a socket assembly in a DC power supply high-voltage live plugging / unplugging mechanism. Figure 2 ;

[0029] Figure 14 The isometric view of the plug-in / plug-out module in the DC power supply high-voltage live plug-in / plug-out mechanism of the present invention. Figure 1 ;

[0030] Figure 15 The isometric view of the plug-in / plug-out module in the DC power supply high-voltage live plug-in / plug-out mechanism of the present invention. Figure 2 ;

[0031] Figure 16This is an exploded view of the plug-in module in a DC power supply high-voltage live plug-in mechanism of the present invention;

[0032] Figure 17 This is a schematic diagram of the first pre-charge circuit in a DC power supply high-voltage live plug-in mechanism of the present invention. Detailed Implementation

[0033] First, it should be noted that the directional terms such as up, down, left, right, front, and back used in this invention are merely descriptions based on the accompanying drawings for ease of understanding, and are not intended to limit the technical solution or the scope of protection claimed in this invention.

[0034] like Figures 1 to 17 The present invention illustrates a specific embodiment of a DC power supply high-voltage live plug-in mechanism, comprising a DC power supply module and a plug-in module. The DC power supply module is housed in a housing 1 that slides within a distribution cabinet. A voltage conversion circuit (not shown) for converting high-voltage DC to low-voltage DC is housed within the housing 1. A plug assembly 2 is located on the rear side of the housing 1, and the plug assembly 2 is fixed to a first compartment 21 on the housing 1. The first compartment 21 includes a first high-voltage compartment 22, a first low-voltage compartment 23, and a first control compartment 24. A first high-voltage input terminal 221, a first low-voltage output terminal 231, and a first control signal terminal 241, connected to the voltage conversion circuit, are correspondingly located in the first high-voltage compartment 22, the first low-voltage compartment 23, and the first control compartment 24. The plug-in module is set with bracket 3 and socket assembly 4. The bracket 3 is fixed on the power distribution cabinet. The socket assembly 4 is set on the second compartment 41 mounted on the bracket 3. The second compartment 41 includes a second high-voltage compartment 42, a second low-voltage compartment 43 and a second control compartment 44 that cooperate with the first high-voltage compartment 22, the first low-voltage compartment 23 and the first control compartment 24 respectively. The second high-voltage compartment 42 is provided with a second high-voltage input terminal 421 that is plugged into the first high-voltage input terminal 221. The second low-voltage compartment 43 is provided with a second low-voltage output terminal 431 that is plugged into the first low-voltage output terminal 231. The second control compartment 44 is provided with a second control signal terminal 441 that is plugged into the first control signal terminal 241.

[0035] The above structural configuration constitutes a simple, easy-to-operate, safe, reliable, and highly standardized DC power supply high-voltage live plug-in mechanism. In practical applications, the high-voltage DC input bus, low-voltage DC output bus, and control signal line are connected to the rear ends of the second high-voltage input terminal 421, the second low-voltage output terminal 431, and the second control signal terminal 441, respectively. When the DC power module is plugged into the socket assembly 4 via the plug assembly 2, the high-voltage DC power is converted into low-voltage DC power through the voltage conversion circuit and then supplies power to the electrical equipment through the low-voltage DC output bus. In a DC regulated power supply system composed of multiple DC power modules connected in parallel, when a DC power module fails, it can be directly removed and replaced with a new one without affecting the normal operation and power supply of other DC power modules. This achieves automatic fault isolation and rapid replacement of DC power modules under high-voltage DC energized conditions. Compared with existing technologies, this simplifies the operation process, improves efficiency, and eliminates the need to disassemble cables (high-voltage DC input bus, low-voltage DC output bus, and control signal line), thus improving the safety of equipment and personnel. This invention improves versatility by modularizing the housing 1, plug assembly 2, bracket 3, and socket assembly 4; and standardizes disassembly and assembly operations by allowing the housing 1 to slide against the power distribution cabinet. It should be noted that the structure, principle, and connection method of the voltage conversion circuit with the first high-voltage input terminal 221, the first low-voltage output terminal 231, and the first control signal terminal 241 are well known to those skilled in the art; the parallel connection of multiple DC power modules refers to the parallel connection of the low-voltage DC output bus, and its parallel connection method is a conventional setup in the art and will not be described further here. In practical applications, to avoid arcing during insertion and removal, the present invention provides a first pre-charge terminal 222 and a second pre-charge terminal 422 in the first high-voltage chamber 22 and the second high-voltage chamber 42, respectively, so that the first pre-charge terminal 222 and the second pre-charge terminal 422 are connected to the first pre-charge circuit and the second pre-charge circuit, respectively. The length of the first pre-charge terminal 222 is set to be greater than the length of the first high-voltage input terminal 221, so that an electrical connection is first established to form a pre-charge circuit during insertion, preventing arcing from damaging the surface plating of the first high-voltage input terminal 221 and the second high-voltage input terminal 421, thereby causing poor contact. Figure 17 The diagram shown is of the first pre-charge circuit, but the second pre-charge circuit is not shown. However, it should be noted that the pre-charge circuits at both ends of the plug-in structure are conventional settings in the art, and their structure and connection method are well known to those skilled in the art.

[0036] As an optimization, this specific embodiment adopts the following structure for the housing 1: a left side plate 11, a front side plate 12, a right side plate 13, a rear side plate 14 and a supporting heat dissipation plate 15 are provided as an integral unit. A detachable cover plate 16 is fixed on the upper side of the left side plate 11, the front side plate 12, the right side plate 13 and the rear side plate 14. The supporting heat dissipation plate 15 is located in the middle of the left side plate 11 and the right side plate 13 in the vertical direction. The front side plate 12 and the rear side plate 14 are located on the upper side of the supporting heat dissipation plate 15. The lower side of the supporting heat dissipation plate 15 is provided with heat dissipation teeth 151 that are integral with it and distributed at left and right intervals. The rear side plate 14 is provided with holes 141 for installing the first compartment 21. The voltage conversion circuit is installed on the supporting heat dissipation plate 15. This configuration divides the housing 1 into upper and lower parts by supporting the heat sink 15. The upper part forms a closed cavity structure through the cover plate 16, ensuring the safety and reliability of the voltage conversion circuit. The lower part forms an external heat dissipation channel through the left side plate 11, the heat dissipation fins 151, and the right side plate 13. Combined with the integrated structure of the left side plate 11, the front side plate 12, the right side plate 13, the rear side plate 14, and the supporting heat sink 15, and using the supporting heat sink 15 as the heat dissipation substrate for the voltage conversion circuit, this effectively reduces thermal resistance and improves thermal conductivity and heat dissipation efficiency. In a specific embodiment, the invention also installs an axial flow fan 17 facing the heat dissipation fins 151 at the front end of the left side plate 11 and the right side plate 13, below the front side plate 12. This allows for faster airflow by activating the axial flow fan 17 when needed, and for making the heat dissipation fins 151 flush with the bottom of the left side plate 11 and the right side plate 13, further improving thermal conductivity and heat dissipation efficiency.

[0037] In practical applications, this invention typically arranges multiple axial flow fans 17 side-by-side. To improve the convenience of pushing and pulling the DC power module, this invention provides ear plates 18 on the outer front end of the left side plate 11 and the right side plate 13, respectively, with a push-pull handle 181 fixed to the front side of the ear plate 18; and fixing holes 182 are provided on the ear plates 18 so that after insertion, the DC power module can be fixed to the power distribution cabinet by passing fixing screws through the fixing holes 182. The ear plates 18 can be manufactured separately and fixed with screws, or they can be manufactured as an integral part of the left side plate 11 and the right side plate 13. This invention also provides sealing rings between the cover plate 16 and the left side plate 11, the front side plate 12, the right side plate 13, and the rear side plate 14, and a sealing gasket between the first compartment 21 and the rear side plate 14 to improve sealing performance.

[0038] In a specific embodiment, the sliding fit structure between the housing 1 and the power distribution cabinet is implemented as follows: Left and right spaced limiting blocks 51 are provided on the layered partition 5 of the power distribution cabinet, forming guide grooves 52 between adjacent limiting blocks 51. The housing 1 of the DC power module is placed in the guide grooves 52, and the bracket 3 of the plug-in module is fixed to the layered partition 5 at the rear end of the guide grooves 52. This configuration, through the left and right limiting effect of the limiting blocks 51 on the housing 1, allows the DC power module to slide along the front-back direction on the layered partition 5 by pushing and pulling, featuring a simple structure and convenient operation. It should be noted that the sliding fit structure between the housing 1 and the power distribution cabinet is not limited to the above-listed forms; a slide rail and slider structure can also be used to achieve the technical objective of this invention. To improve the accuracy of the connection, this specific embodiment fixes rearward-facing positioning pins 19 at the rear ends of the left side plate 11 and the right side plate 13, respectively. The ends of the positioning pins 19 are set into a tapered structure, and the length of the positioning pins 19 is greater than the lengths of the first high-voltage input terminal 221, the first low-voltage output terminal 231, and the first control signal terminal 241. Correspondingly, positioning holes 31 that cooperate with the positioning pins 19 are provided on the bracket 3. This arrangement, through the cooperation of the positioning pins 19 and the positioning holes 31, achieves the positioning of the DC power module on the distribution cabinet. By setting the positioning pins 19 to a larger length, the positioning pins 19 make contact with the distribution cabinet first during connection, thus balancing the potential between the DC power module and the distribution cabinet in advance. This effectively avoids damage to the DC power module and electric shock to the human body due to potential mismatch, improving safety.

[0039] In a specific embodiment, the present invention mounts the second compartment 41 of the socket assembly 4 onto the bracket 3 as follows: a slot 32 for mounting the second compartment 41 is provided on the bracket 3, and threaded holes 33 are respectively provided on the left and right sides of the slot 32. The second compartment 41 is placed in the slot 32, and a gap is reserved between the second compartment 41 and the peripheral wall of the slot 32. Mounting holes 45 corresponding to the threaded holes 33 are respectively provided on the left and right front ends of the second compartment 41. A connecting screw screwed into the threaded hole 33 is provided in the mounting hole 45, and the diameter of the connecting screw is smaller than the inner diameter of the mounting hole 45. This floating mounting method allows the socket assembly 4 to have a certain amount of movement in the circumferential direction, improving the adaptability to the plug assembly 2 and the success and reliability of the insertion. It should be noted that the connecting screw does not tighten the second compartment 41, but should keep the second compartment 41 in a certain loose state so that it can be slightly moved in the circumferential direction during insertion. In a specific embodiment, the present invention also provides ventilation holes 34 spaced apart on the lower side of the slot 32 of the bracket 3 to avoid obstructing airflow; and provides a third high-pressure chamber 35, a third low-pressure chamber 36 and a third control chamber 37 on the rear side of the slot 32, corresponding to the second high-pressure chamber 42, the second low-pressure chamber 43 and the second control chamber 44, to improve protection and safety.

[0040] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications made by those skilled in the art based on the technical solutions of the present invention without departing from the design concept of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A DC power supply high-voltage live plug-in / plug-out mechanism, characterized in that, The device includes a DC power supply module and a plug-in module. The DC power supply module includes a housing (1) that slides with the power distribution cabinet. The housing (1) contains a voltage conversion circuit. A plug assembly (2) is provided on the rear side of the housing (1). The plug assembly (2) includes a first compartment (21) fixed on the housing (1). The first compartment (21) includes a first high-voltage compartment (22), a first low-voltage compartment (23), and a first control compartment (24). The first high-voltage compartment (22), the first low-voltage compartment (23), and the first control compartment (24) are respectively provided with a first high-voltage input terminal (221), a first low-voltage output terminal (231), and a first control signal terminal (241) connected to the voltage conversion circuit. The plug-in module includes a bracket (3) and a socket assembly (4). The bracket (3) is fixed on the power distribution cabinet. The socket assembly (4) includes a second compartment (41) installed on the bracket (3). The second compartment (41) includes a second high-voltage compartment (42), a second low-voltage compartment (43), and a second control compartment (44) that cooperate with the first high-voltage compartment (22), the first low-voltage compartment (23), and the first control compartment (24). The second high-voltage compartment (42) is provided with a second high-voltage input terminal (421) that is plugged into the first high-voltage input terminal (221). The second low-voltage compartment (43) is provided with a second low-voltage output terminal (431) that is plugged into the first low-voltage output terminal (231). The second control compartment (44) is provided with a second control signal terminal (441) that is plugged into the first control signal terminal (241). The bracket (3) is provided with a slot (32) for installing the second chamber (41). The left and right sides of the slot (32) are respectively provided with threaded holes (33). The second chamber (41) is located in the slot (32). There is a gap between the second chamber (41) and the peripheral wall of the slot (32). The left and right ends of the front side of the second chamber (41) are respectively provided with mounting holes (45) corresponding to the threaded holes (33). The mounting holes (45) are provided with connecting screws screwed into the threaded holes (33). The diameter of the connecting screws is smaller than the inner diameter of the mounting holes (45). The bracket (3) is provided with ventilation holes (34) spaced on the left and right sides at the lower side of the slot (32). The bracket (3) is provided with a third high-pressure chamber (35), a third low-pressure chamber (36) and a third control chamber (37) corresponding to the second high-pressure chamber (42), the second low-pressure chamber (43) and the second control chamber (44) at the rear side of the slot (32). The first high-voltage chamber (22) is provided with a first pre-charge terminal (222), the length of the first pre-charge terminal (222) is greater than the length of the first high-voltage input terminal (221), and the first pre-charge terminal (222) is connected to a first pre-charge circuit. The second high-voltage chamber (42) is provided with a second pre-charge terminal (422) that is plugged into the first pre-charge terminal (222), and the second pre-charge terminal (422) is connected to a second pre-charge circuit.

2. The DC power supply high-voltage live plug-in / unplug mechanism according to claim 1, characterized in that, The housing (1) includes a left side plate (11), a front side plate (12), a right side plate (13), a rear side plate (14) and a supporting heat sink plate (15) that are connected as one piece. A detachable cover plate (16) is fixed on the upper side of the left side plate (11), the front side plate (12), the right side plate (13) and the rear side plate (14). The supporting heat sink plate (15) is located in the middle of the left side plate (11) and the right side plate (13) in the vertical direction. The front side plate (12) and the rear side plate (14) are located on the upper side of the supporting heat sink plate (15). The lower side of the supporting heat sink plate (15) is provided with heat dissipation teeth (151) that are integrated with it and distributed at left and right intervals. The rear side plate (14) is provided with holes (141) for installing the first compartment (21). The voltage conversion circuit is installed on the supporting heat sink plate (15).

3. The DC power supply high-voltage live plug-in / plug-out mechanism according to claim 2, characterized in that, The front ends of the left side plate (11) and the right side plate (13) are equipped with axial flow fans (17) facing the heat dissipation teeth (151), which are flush with the bottom of the left side plate (11) and the right side plate (13).

4. The DC power supply high-voltage live plug-in / unplug mechanism according to claim 3, characterized in that, The axial flow fan (17) is arranged in a row on the left and right. The front side of the left side plate (11) and the right side plate (13) are respectively provided with ear plates (18). A push-pull handle (181) is fixed on the front side of the ear plate (18), and a fixing hole (182) is provided on the ear plate (18).

5. The DC power supply high-voltage live plug-in / unplug mechanism according to claim 4, characterized in that, A sealing ring is provided between the cover plate (16) and the left side plate (11), the front side plate (12), the right side plate (13) and the rear side plate (14), and a sealing gasket is provided between the first compartment body (21) and the rear side plate (14).

6. The DC power supply high-voltage live plug-in / unplug mechanism according to claim 5, characterized in that, The layered partition (5) of the power distribution cabinet is provided with left and right spaced limit blocks (51), and a guide groove (52) is formed between adjacent limit blocks (51). The housing (1) of the DC power module is located in the guide groove (52), and the bracket (3) of the plug-in module is fixed on the layered partition (5) at the rear end of the guide groove (52).

7. The DC power supply high-voltage live plug-in / unplug mechanism according to claim 5, characterized in that, The rear ends of the left side plate (11) and the right side plate (13) are respectively fixed with rearward positioning pins (19). The end of the positioning pin (19) is tapered. The length of the positioning pin (19) is greater than the length of the first high voltage input terminal (221), the first low voltage output terminal (231) and the first control signal terminal (241). The bracket (3) is provided with positioning holes (31) that cooperate with the positioning pin (19).

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