Reconnection protection grounding resistor

Abstract

The utility model discloses a reconnection protection grounding resistor in the technical field of grounding resistors, which comprises a bottom plate, two ends of the bottom plate are respectively connected with a fixing plate, a shell is arranged between the two fixing plates, a connecting piece is arranged at the top of the bottom plate, the bottom plate and the fixing plates are arranged through bolts, the shell is buckled on the bottom plate, and the connecting piece is arranged on the bottom plate. The bottom plate, the fixed plate and the shell are spliced and mounted by using bolts, so that the shell is convenient to disassemble and assemble for maintenance operation, an existing wire-wound resistor is large in size and unstable in resistance value, the protection effect of a grounding circuit is easy to be poor, and the problems that a resistor structure is inconvenient to splice, mount, disassemble and maintain, and the working efficiency is high are solved. And the protection effect of heat dissipation of the existing equipment is not good, the temperature of electronic components in the equipment is easy to rise, and the stability of normal use of the equipment is influenced.

Description

Technical Field

[0001] This utility model relates to the field of grounding resistance technology, specifically a reconnection protection grounding resistor. Background Technology

[0002] Grounding resistance is the resistance encountered when current flows from a grounding device into the earth and then through the earth to another grounding body or diffuses to a distance. The grounding resistance value reflects the good contact between the electrical device and the "ground" and reflects the scale of the grounding grid. Resistor elements include: carbon film resistors, metal film resistors, metal wire-wound resistors, metal resistance sheets, etc. Among them, high-power resistors mainly use wire-wound resistors, which are mainly used in circuits that need to discharge large pulse energy in a short time. Currently, the strength of resistor equipment connection and installation is low.

[0003] Existing wire-wound resistors are large in size and have unstable resistance values, which can easily lead to poor protection of the grounding circuit. They are also inconvenient for splicing, installing, disassembling, and repairing the resistor structure. Furthermore, existing equipment has poor heat dissipation protection, which can easily cause the temperature of the internal electronic components to rise, affecting the stability of normal equipment operation. Therefore, those skilled in the art have provided a reconnection protective grounding resistor to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a reconnection protection grounding resistor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reconnection protection grounding resistor, including a base plate, with fixing plates connected to both ends of the base plate, and a housing installed between the two fixing plates;

[0006] A connector is installed on the top of the base plate, and the base plate and the fixing plate are installed together by bolts. The housing and the fixing plate are also installed together by bolts.

[0007] Preferably, the connector includes a first series plate installed on one side of the fixed plate, and a second series plate installed on the other side of the fixed plate. Three resistors are evenly arranged between the first series plate and the second series plate. A connecting bolt passes through the inner side of the fixed plate. A support ring is installed on the outer side of the connecting bolt and located on the outer side of the fixed plate. Two nuts are fitted on the outer side of the connecting bolt. The connecting bolt passes through the first series plate and the second series plate and is installed with the fixed plate.

[0008] Preferably, three evenly arranged screws pass through between the first and second series plates. A fixing tube is fitted on the outside of the screws. A fixing ring is installed on the outside of the screws and at the top of the fixing tube. The screws pass through the base plate and are screwed to it. The screws pass through the fixing tube and are rotatably connected to it.

[0009] Preferably, a heat dissipation plate is laid on the top of the base plate, and a pad is laid on the top of the heat dissipation plate.

[0010] Preferably, the heat sink has a plurality of evenly arranged heat dissipation holes on one side.

[0011] Preferably, the top of the first series plate has a plurality of evenly arranged annular grooves, and two grooves are respectively opened on both sides of the first series plate.

[0012] Preferably, mounting plates extend from both sides of the housing, and three evenly arranged mounting holes are opened on one side of the mounting plate. The mounting plate is installed with the base plate by bolts.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this utility model, by setting a fixing plate and a shell, the shell has a U-shaped cross section and is snapped onto the base plate. The base plate, fixing plate and shell are spliced ​​and installed by bolts to facilitate disassembly and assembly of the shell for maintenance work. It can realize the protection function of the grounding circuit during the multiple-unit operation of the EMU within the limited space of the EMU body, and solve the defects of large size and unstable resistance value of wire-wound resistors.

[0015] 2. In this utility model, by setting a first series plate, a second series plate, a resistor, connecting bolts, and a support ring, the first series plate and the second series plate are both L-shaped in cross section. The first series plate is snapped onto the top of the resistor, and the second series plate is located at the bottom of the resistor. The first series plate and the second series plate are connected and installed by connecting bolts passing through the fixing plate. The three resistors are located between the first series plate and the second series plate. After the current passes through the first series plate and enters the resistor, it is guided by the second series plate.

[0016] 3. In this utility model, by setting screws, fixing tubes and fixing rings, three screws are inserted into the resistor body through the fixing tube, and then the fixing rods are fitted on the outside of the screws to press down the fixing tube, so that the fixing tube and fixing ring can splice and install the resistor body and the base plate, thereby improving the stability of the installation and fixing of the first series plate, the second series plate and the resistor body. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 Left sectional stereoscopic view of the overall structure of this utility model Figure 1 ;

[0019] Figure 3 Left sectional stereoscopic view of the overall structure of this utility model Figure 2;

[0020] Figure 4 This is a schematic diagram of the overall structure of the present invention, including the base plate, fixing plate, first series plate, second series plate, resistor, connecting bolt, support ring, screw, fixing tube, fixing ring, heat dissipation plate, pad, heat dissipation hole, annular groove and groove.

[0021] Figure 5 This is a schematic diagram of the structure of the first series plate, the second series plate, the resistor, the annular groove, and the groove in the overall structure of this utility model.

[0022] In the diagram: 1. Base plate; 2. Fixing plate; 3. Housing; 4. First series plate; 5. Second series plate; 6. Resistor; 7. Connecting bolt; 8. Support ring; 9. Screw; 10. Fixing tube; 11. Fixing ring; 12. Heat sink; 13. Pad; 14. Heat dissipation hole; 15. Annular groove; 16. Groove; 17. Mounting plate; 18. Mounting hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 In this embodiment of the utility model, a reconnection protection grounding resistor includes a base plate 1, with fixing plates 2 connected to both ends of the base plate 1, a housing 3 installed between the two fixing plates 2, a connector installed on the top of the base plate 1, mounting plates 17 extending from both sides of the housing 3, and three evenly arranged mounting holes 18 opened on one side of the mounting plate 17. The mounting plate 17 is installed to the base plate 1 by bolts, the base plate 1 is installed to the fixing plates 2 by bolts, and the housing 3 is installed to the fixing plates 2 by bolts.

[0025] The connector includes a first series plate 4 installed on one side of the fixed plate 2, a second series plate 5 installed on the other side of the fixed plate 2, three resistors 6 evenly arranged between the first series plate 4 and the second series plate 5, a connecting bolt 7 passing through the inner side of the fixed plate 2, a support ring 8 installed on the outer side of the connecting bolt 7 and located on the outer side of the fixed plate 2, two nuts being fitted on the outer side of the connecting bolt 7, and the connecting bolt 7 passing through the first series plate 4 and the second series plate 5 respectively and being installed with the fixed plate 2.

[0026] In use, the shell 3 has a U-shaped cross section and is snapped onto the base plate 1. The base plate 1, the fixing plate 2, and the shell 3 are spliced ​​and installed using bolts to facilitate disassembly and assembly of the shell 3 for maintenance. The mounting plates 17 extending on both sides of the shell 3 allow operators to install the shell 3 by passing bolts through the mounting holes 18.

[0027] The connecting bolt 7 passes through the fixing plate 2, and the support ring 8 is sleeved on the outside of the connecting bolt 7. Then, two nuts are used to install the connecting bolt 7 and the fixing plate 2. The first series plate 4 and the second series plate 5 are both L-shaped in cross section. The first series plate 4 is snapped on the top of the resistor 6, and the second series plate 5 is located at the bottom of the resistor 6. The first series plate 4 and the second series plate 5 are connected and installed by the connecting bolt 7 passing through the fixing plate 2. The three resistors 6 are located between the first series plate 4 and the second series plate 5. The current passes through the first series plate 4 and enters the resistor 6, and then is guided by the second series plate 5.

[0028] Furthermore, three evenly arranged screws 9 pass through the first series plate 4 and the second series plate 5. A fixing tube 10 is fitted on the outside of the screws 9. A fixing ring 11 is installed on the outside of the screws 9 and at the top of the fixing tube 10. The screws 9 pass through the base plate 1 and are screwed to it. The screws 9 pass through the fixing tube 10 and are rotatably connected to it.

[0029] In one embodiment, specifically, three screws 9 are inserted into the resistor 6 through the fixing tube 10, and then a fixing rod is fitted on the outside of the screws 9 to press down the fixing tube 10, so that the fixing tube 10 and the fixing ring 11 are spliced ​​and installed on the resistor 6 and the base plate 1, thereby improving the stability of the installation and fixing of the first series plate 4, the second series plate 5 and the resistor 6.

[0030] The base plate 1 has a heat sink 12 on top, a pad 13 on top of the heat sink 12, and a plurality of evenly arranged heat dissipation holes 14 on one side of the heat sink 12. The first series plate 4 has a plurality of evenly arranged annular grooves 15 on top, and two grooves 16 are respectively opened on both sides of the first series plate 4. The inner sides of the grooves 16 and the annular grooves 15 are coated with thermal grease to increase the heat dissipation area of ​​the first series plate 4. The pad 13 is a thermally conductive material. The heat sink 12 and the pad 13 can support the second series plate 5 upward. The heat generated by the first series plate 4, the second series plate 5 and the resistor 6 is conducted downward through the pad 13 and the heat sink 12. The plurality of heat dissipation holes 14 on one side of the heat sink 12 can facilitate the dissipation of heat.

[0031] The working principle of this utility model:

[0032] First, the connecting bolt 7 passes through the fixing plate 2, and the support ring 8 is sleeved on the outside of the connecting bolt 7. The first series plate 4 and the second series plate 5 are connected and installed by the connecting bolt 7 passing through the fixing plate 2. Then, the three screws 9 are inserted into the resistor 6 through the fixing tube 10. The housing 3 is snapped onto the base plate 1. The base plate 1, the fixing plate 2 and the housing 3 are spliced ​​and installed by the bolts. Then, the fixing rod is sleeved on the outside of the screw 9 to press down the fixing tube 10. At this time, the fixing tube 10 and the fixing ring 11 splice and install the resistor 6 and the base plate 1. When the first series plate 4, the second series plate 5 and the resistor 6 are working, the heat generated is conducted downward through the pad 13 and the heat sink 12 to dissipate heat.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A reconnection protection grounding resistor, comprising a base plate (1), characterized in that: The bottom plate (1) is connected to two fixing plates (2) at both ends, and a housing (3) is installed between the two fixing plates (2). A connector is installed on the top of the bottom plate (1). The bottom plate (1) and the fixing plates (2) are installed by bolts, and the housing (3) and the fixing plates (2) are installed by bolts. The connector includes a first series plate (4) installed on one side of the fixed plate (2), and a second series plate (5) installed on the other side of the fixed plate (2). Three resistors (6) are evenly arranged between the first series plate (4) and the second series plate (5). A connecting bolt (7) passes through the inner side of the fixed plate (2). A support ring (8) is installed on the outer side of the connecting bolt (7) and located on the outer side of the fixed plate (2). Two nuts are fitted on the outer side of the connecting bolt (7). The connecting bolt (7) passes through the first series plate (4) and the second series plate (5) and is installed on the fixed plate (2).

2. The reconnection protection grounding resistor according to claim 1, characterized in that: Three screws (9) are evenly arranged between the first series plate (4) and the second series plate (5). A fixing tube (10) is fitted on the outside of the screw (9). A fixing ring (11) is installed on the outside of the screw (9) and at the top of the fixing tube (10). The screw (9) passes through the bottom plate (1) and is screwed to it. The screw (9) passes through the fixing tube (10) and is rotatably connected to it.

3. The reconnection protection grounding resistor according to claim 2, characterized in that: The bottom plate (1) is covered with a heat dissipation plate (12), and the heat dissipation plate (12) is covered with a pad (13).

4. A reconnection protection grounding resistor according to claim 3, characterized in that: The heat sink (12) has a plurality of evenly arranged heat dissipation holes (14) on one side.

5. A reconnection protection grounding resistor according to claim 4, characterized in that: The top of the first series plate (4) is provided with a plurality of annular grooves (15) evenly arranged, and two grooves (16) are provided on both sides of the first series plate (4).

6. A reconnection protection grounding resistor according to claim 2, characterized in that: Mounting plates (17) extend from both sides of the housing (3). Three mounting holes (18) are evenly arranged on one side of the mounting plate (17). The mounting plate (17) is installed with the base plate (1) by bolts.

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