Quick disassembly and assembly structure for fuse and current sensor

Abstract

The utility model discloses a quick dismounting structure for a fuse and a current sensor, which comprises a unit frame and a main loop copper bar, the unit frame is detachably connected with an electrical cabinet, the main loop copper bar is arranged on the unit frame, and the main loop copper bar is arranged on the unit frame. Two ends of the main loop copper bar are respectively an external contact used for connecting an external electrical component of the electrical cabinet and an internal contact used for connecting an electrical component of the electrical cabinet, a terminal block is fixedly arranged on the unit frame, the external contact is arranged on the terminal block, and the internal contact is located at one end, close to the terminal block, of the unit frame; the main loop copper bar comprises an input copper bar and an output copper bar, the input copper bar is connected in series with a fuse and a current sensor, and the fuse and the current sensor are arranged on the unit frame. The unit frame can be integrally inserted into the electrical cabinet or pulled out of the electrical cabinet, and the maintenance work can be completed outside the cabinet and is not limited by the space in the cabinet any more; wire connection and wire removal can be carried out in an unshielded area, operation is simple, convenient and rapid, and the electrical cabinet does not need to reserve a large space for maintenance.

Description

Technical Field

[0001] This utility model relates to the field of locomotive electrical cabinet technology, and in particular to a quick-assembly and disassembly structure for fuses and current sensors. Background Technology

[0002] Current sensors and fuses need to be installed on the main circuit copper busbar and are maintained frequently. Because the current sensors and fuses in the main circuit are large in size, during inspection and maintenance, it is necessary not only to disassemble the electrical components themselves, but also to disassemble the main circuit copper busbar, which requires a large operating space. The size and specifications of the locomotive electrical cabinet are quite strict, and its internal space is extremely limited, making the space available for inspection and maintenance extremely small. Therefore, installation and maintenance operations are extremely inconvenient. Summary of the Invention

[0003] This invention provides a quick assembly and disassembly structure for fuses and current sensors to overcome the above-mentioned problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A quick-release structure for fuses and current sensors includes: a unit frame and a main circuit copper busbar. The unit frame is detachably connected to an electrical cabinet. The main circuit copper busbar is disposed on the unit frame. The two ends of the main circuit copper busbar are an external contact for connecting external electrical components of the electrical cabinet and an internal contact for connecting electrical components of the electrical cabinet, respectively. A terminal block is fixed on the unit frame. The external contact is disposed on the terminal block, and the internal contact is located at the end of the unit frame closer to the terminal block.

[0006] The main circuit copper busbar includes an input copper busbar and an output copper busbar. A fuse and a current sensor are connected in series on the input copper busbar. The fuse and the current sensor are mounted on the unit frame.

[0007] Furthermore, a fixing plate and a guide tube are fixed on the unit frame. The fixing plate is located at one end of the unit frame near the terminal block. The fixing plate has a through hole. The guide tube extends from one end of the unit frame near the terminal block to the end away from the terminal block.

[0008] One end of the unit frame is fixed to the electrical cabinet by bolts set in the through hole of the fixing plate, and the other end of the unit frame is fixed to the electrical cabinet by bolts set in the through hole of the guide tube.

[0009] Furthermore, a control circuit connection port is fixed on the unit frame. The control circuit connection port is located at one end of the unit frame near the terminal block and is electrically connected to a fuse and a current sensor.

[0010] Furthermore, it also includes a wiring bracket fixed on the unit frame, through which the data lines of the fuse and current sensor are connected to the control circuit connection port.

[0011] Furthermore, a partition is fixedly provided on the terminal block, and the partition is located between adjacent external contacts.

[0012] Furthermore, it also includes a fan, and a fan bracket for mounting the fan is fixed on the unit frame, wherein the airflow direction of the fan is parallel to the extension direction of the guide tube.

[0013] Beneficial effects: The present invention discloses a quick-release structure for fuses and current sensors. By integrating the main circuit copper busbar, fuse, current sensor, and terminal block into a unit frame that can be detachably connected to the electrical cabinet, the unit frame can be inserted into or pulled out of the electrical cabinet during installation and maintenance. Maintenance work can be completed outside the cabinet, no longer limited by the internal space. By placing both external and internal contacts at the same end of the unit frame, wiring and disconnection can be performed in an unobstructed area, making operation simpler and faster. The electrical cabinet does not need to reserve a large amount of space for maintenance, which helps to optimize the internal space of the cabinet. Attached Figure Description

[0014] 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, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a quick-assembly and disassembly structure for fuses and current sensors disclosed in this utility model.

[0016] Figure 2 This is a top view of a quick-assembly and disassembly structure for fuses and current sensors disclosed in this utility model.

[0017] Figure 3 This is a side view of a quick-assembly and disassembly structure for fuses and current sensors disclosed in this utility model.

[0018] Figure 4 This is a front view of a quick-assembly and disassembly structure for fuses and current sensors disclosed in this utility model.

[0019] In the picture:

[0020] 1. Unit frame;

[0021] 21. Input copper busbar; 22. Output copper busbar; 2a. Internal contact; 2b. External contact;

[0022] 3. Fuse;

[0023] 4. Current sensor;

[0024] 5. Terminal block; 51. Partition plate;

[0025] 6. Fixing plate;

[0026] 7. Guide tube;

[0027] 8. Control loop connection port;

[0028] 9. Fan;

[0029] 10. Cable management brackets;

[0030] 11. Insulating post. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] This embodiment provides a quick assembly / disassembly structure for fuses and current sensors, such as... Figures 1 to 3 As shown, it includes: a unit frame 1 and a main circuit copper busbar. The unit frame 1 is detachably connected to the electrical cabinet, and the main circuit copper busbar is installed on the unit frame 1, as shown. Figure 1 and Figure 2 As shown, the two ends of the main circuit copper busbar are respectively an external contact 2b for connecting external electrical components of the electrical cabinet and an internal contact 2a for connecting electrical components of the electrical cabinet, as shown. Figures 1 to 3 As shown, a terminal block 5 is fixed on the unit frame 1, the external contact 2b is disposed on the terminal block 5, and the internal contact 2a is located at one end of the unit frame 1 near the terminal block 5.

[0033] like Figure 1 As shown, the main circuit copper busbar includes an input copper busbar 21 and an output copper busbar 22. A fuse 3 and a current sensor 4 are connected in series on the input copper busbar 21. The fuse 3 and the current sensor 4 are mounted on the unit frame 1. Current enters the electrical cabinet through the input copper busbar 21, and after rectification and conversion, it is output from the output copper busbar 22. In this embodiment, as... Figure 3As shown, the fuse 3 and the main circuit copper busbar are both fixed on the unit frame 1 by the insulating column 11, and the current sensor 4 is fixed on the unit frame 1 by the sensor bracket.

[0034] This embodiment discloses a quick-release structure for fuses and current sensors. By integrating the main circuit copper busbar, fuse 3, current sensor 4 and terminal block 5 into a unit frame 1 that can be detachably connected to the electrical cabinet, the unit frame 1 can be inserted into or pulled out of the electrical cabinet during installation and maintenance. Maintenance work can be completed outside the cabinet and is no longer limited by the space inside the cabinet.

[0035] When the unit frame 1 is inserted into the cabinet along the slide rail provided by the electrical cabinet, one end of the unit frame 1 with the terminal block 5 is exposed, and the other end is completely inside the cabinet. By setting both the external contact 2b and the internal contact 2a at the same end of the unit frame 1, wiring and disconnection can be carried out in an unobstructed area, making the operation simpler and faster. The electrical cabinet does not need to reserve a lot of space for maintenance, which helps to optimize the space inside the cabinet.

[0036] Specifically, such as Figure 1 and Figure 2 As shown, a fixing plate 6 and a guide tube 7 are welded onto the unit frame 1. The fixing plate 6 is located at one end of the unit frame 1 near the terminal block 5. The fixing plate 6 has a through hole. The guide tube 7 extends from one end of the unit frame 1 near the terminal block 5 to the end away from the terminal block 5.

[0037] One end of the unit frame 1, which has a terminal block 5, is fixed to the electrical cabinet by bolts set in the through holes of the fixing plate 6. The bolts in the through holes of the fixing plate 6 are fixedly connected to the frame structure of the electrical cabinet body. The other end of the unit frame 1 is fixed to the electrical cabinet by bolts set in the through holes of the guide tube 7.

[0038] To ensure reliable connection while facilitating assembly and disassembly of the unit frame 1, an additional guide tube 7 is provided to guide the bolts. This allows workers to insert long bolts into the guide tube 7 from the end of the unit frame 1 with the terminal block 5, thus fixing the long bolts to the frame structure inside the electrical cabinet. The bolt tightening operation can be carried out in an unobstructed area, making the operation simpler and faster.

[0039] Specifically, such as Figure 1 and Figure 4 As shown, a control circuit connection port 8 is fixed on the unit frame 1. The control circuit connection port 8 is located at one end of the unit frame 1 near the terminal block 5. The control circuit connection port 8 is electrically connected to the fuse 3 and the current sensor 4, so that the fuse 3 and the current sensor 4 can be connected to the control circuit through the control circuit connection port 8.

[0040] Preferably, such as Figures 1 to 3 As shown, it also includes a wiring bracket 10 fixed on the unit frame 1. The data lines of the fuse 3 and the current sensor 4 are connected to the control circuit connection port 8 through the wiring bracket 10. The data lines can be wrapped or placed on the wiring bracket 10 for easy wiring.

[0041] Preferably, such as Figures 1 to 4 As shown, a partition 51 is fixed on the terminal block 5. The partition 51 is located between adjacent external contacts 2b to ensure insulation gap and creepage distance within a limited space.

[0042] Preferably, such as Figure 2 As shown, it also includes a fan 9. A fan bracket for mounting the fan 9 is fixed on the unit frame 1. The airflow direction of the fan 9 is parallel to the extension direction of the guide tube 7 to facilitate auxiliary heat dissipation inside the cabinet.

[0043] During maintenance, first remove the bolts connecting the wires of the external electrical components (including but not limited to generators, transformers, etc.) to the external contact 2b. Then remove the bolts connecting the copper busbars of the internal electrical components (including but not limited to rectifiers, converters, etc.) to the internal contact 2a. Pull out the connector (which is located on the cable connecting the control circuit) inserted into the control circuit connection port 8. Then remove the bolts in the through holes of the fixing plate 6 and the through holes of the guide tube 7. Horizontally pull the unit frame 1 out of the cabinet slide rail. At this time, the fuse 3 and the current sensor 4 can be replaced.

[0044] This embodiment discloses a quick-release structure for fuses and current sensors, which is particularly suitable for corner locations inside cabinets where work is inconvenient. It can significantly save space for wiring, cabling, disassembly, and maintenance. The cabinet interior portion concealed by the unit frame 1 can appropriately house some low-maintenance-frequency electrical components, which is beneficial for making full use of the cabinet space and optimizing the cabinet space.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A quick-release structure for fuses and current sensors, characterized in that, include: The unit frame (1) and the main circuit copper busbar are detachably connected to the electrical cabinet. The main circuit copper busbar is set on the unit frame (1). The two ends of the main circuit copper busbar are external contacts for connecting external electrical components of the electrical cabinet and internal contacts for connecting electrical components of the electrical cabinet, respectively. A terminal block (5) is fixed on the unit frame (1). The external contacts are set on the terminal block (5). The internal contacts are located at the end of the unit frame (1) near the terminal block (5). The main circuit copper busbar includes an input copper busbar (21) and an output copper busbar (22). A fuse (3) and a current sensor (4) are connected in series on the input copper busbar (21). The fuse (3) and the current sensor (4) are mounted on the unit frame (1).

2. The quick-release structure for fuses and current sensors according to claim 1, characterized in that, A fixing plate (6) and a guide tube (7) are fixed on the unit frame (1). The fixing plate (6) is located at one end of the unit frame (1) near the terminal block (5). The fixing plate (6) has a through hole. The guide tube (7) extends from one end of the unit frame (1) near the terminal block (5) to the end away from the terminal block (5). One end of the unit frame (1) is fixed to the electrical cabinet by bolts set in the through hole of the fixing plate (6), and the other end of the unit frame (1) is fixed to the electrical cabinet by bolts set in the through hole of the guide tube (7).

3. The quick-assembly and disassembly structure for fuses and current sensors according to claim 1, characterized in that, The unit frame (1) is fixed with a control circuit connection port (8), which is located at one end of the unit frame (1) near the terminal block (5). The control circuit connection port (8) is electrically connected to the fuse (3) and the current sensor (4).

4. The quick-release structure for fuses and current sensors according to claim 3, characterized in that, It also includes a wiring bracket (10) fixed on the unit frame (1), and the data lines of the fuse (3) and the current sensor (4) are connected to the control circuit connection port (8) through the wiring bracket (10).

5. The quick-release structure for fuses and current sensors according to claim 1, characterized in that, A partition (51) is fixed on the terminal block (5), and the partition (51) is located between adjacent external contacts.

6. The quick-release structure for fuses and current sensors according to claim 2, characterized in that, It also includes a fan (9), and a fan bracket for mounting the fan (9) is fixed on the unit frame (1), and the airflow direction of the fan (9) is parallel to the extension direction of the guide tube (7).

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