Substation phase line grounding structure capable of automatically cutting off power supply

Abstract

The utility model relates to the technical field of phase line grounding, in particular to a transformer substation phase line grounding structure capable of automatically cutting off a power supply, which is provided with a mechanism which acts on isolation and disconnection of a main power line through fusing and elastic components inside, and can cut off the power supply in time and improve the reliability. Comprising a grounding box, a jack group, a phase line grounding mechanism, a power supply main line, an external frame, a spring I, a conductive plate, a wire holder, a spring II, a base, an insulating spacer and a fuse wire, the phase line grounding mechanism is arranged on the right side in the grounding box, and the jack group is arranged at the input end of the phase line grounding mechanism on the front side of the grounding box; a power supply main line is arranged between the grounding box and the phase line grounding mechanism, an outer frame is connected to the left middle side in the grounding box, a wire holder is arranged on the outer side of the phase line grounding mechanism and arranged at the bottom of the outer frame, the top end of the wire holder is connected with the bottom end of the base through a second spring, and a fusing line is connected between the wire holder and the base. The top of the base is connected with the bottom of the insulating spacer.

Description

Technical Field

[0001] The utility model relates to the technical field of phase line grounding, in particular to a phase line grounding structure of a transformer substation capable of automatically cutting off power supply. Background Art

[0002] In order to make AC power conversion function very convenient, industrial electricity usually uses three-phase sinusoidal AC and the current phases (reflecting the direction and magnitude of the current) differ by 120 degrees. Usually we call each wire connected according to this principle a phase line.

[0003] If a phase line is grounded, the voltage of the ungrounded phase will increase, and the insulation in weak places will easily break down, making the casing of the equipment energized. Since the low-voltage three-phase adopts protective grounding, the casing of all grounded equipment and the neutral line of the transformer will all have voltage, and: the grounding current = 220 / (phase line grounding resistance + transformer neutral point grounding resistance), thereby reducing the grounding current of the neutral line.

[0004] The existing phase line grounding mechanism generally cannot automatically cut off the power supply, has certain dangers and poor reliability. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a substation phase line grounding structure that can automatically cut off the power supply and has an internal fuse and elastic components that act on the main power line to isolate and disconnect the main power line, thereby timely cutting off the power supply and improving reliability.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a phase line grounding structure of a substation that can automatically cut off power supply, comprising a grounding box, a socket group, a phase line grounding mechanism, a power main line, an external frame, a spring one, a conductive plate, a terminal block, a spring two, a base, an insulating isolation plate and a fusible wire, wherein a phase line grounding mechanism is arranged on the right side inside the grounding box, a socket group is arranged on the input end of the phase line grounding mechanism on the front side of the grounding box, and a power main line is also arranged between the grounding box and the phase line grounding mechanism, an external frame is connected to the left middle side inside the grounding box, the power main line is in a cut-off state, and the cut-off side of the power main line is placed inside the external frame, and the two sides of the cut-off of the power main line are respectively connected to the outer ends of a group of conductive plates, and the outer sides of the two groups of conductive plates are respectively connected to the left and right sides of the inner side of the external frame through a group of spring one, a terminal block is also arranged on the outer side of the phase line grounding mechanism, the terminal block is placed at the bottom of the external frame, the top of the terminal block is connected to the bottom end of the base through spring two, a fusible wire is also connected between the terminal block and the base, and the top of the base is connected to the bottom end of the insulating isolation plate.

[0009] Preferably, it also includes an open guide plate, and the bottom end of each group of conductive plates is respectively connected to the top end of a group of bases.

[0010] Preferably, it also includes hinges, a box cover, a locking ring, a pin piece and a pin rack, the rear side of the top end of the grounding box is movably connected to the rear side end of the box cover via the hinge, the middle front side of the top end of the box cover is rotatably connected to the inner end of the locking ring, the output end of the locking ring is connected to one side of the inner end of the pin piece, and the middle front side of the top end of the grounding box is connected to the inner end of the pin rack.

[0011] Preferably, it further comprises a handle, and the front end of the right side of the box cover is connected to the inner side of the handle.

[0012] Preferably, it further comprises an information plate, and the right rear side of the outer end of the box cover is connected to the inner side of the information plate.

[0013] Preferably, it further comprises a handle, and the middle parts of the left and right sides of the grounding box are respectively connected to the inner sides of a group of handles.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a substation phase line grounding structure that can automatically cut off the power supply, which has the following beneficial effects:

[0016] Under the connection of the external frame, through the elastic action of the two groups of springs 1, the two groups of conductive plates are fitted, so that the main power line is in a connected state, the base is connected through the fusible line so that the insulating isolation plate is in the lower position, the grounding box is installed in the corresponding position, and is electrically connected to the outside through the socket group, and the phase line is grounded through the phase line grounding mechanism. When an emergency occurs, the internal current changes, and the fusible line is melted through the terminal seat, so that the spring 2 acts on the base to support it upward, so that the insulating isolation plate moves up to overcome the spring 1 and separate the two groups of conductive plates, so that the main power line is disconnected, thereby cutting off the power supply to avoid abnormalities. An internal mechanism that acts on the isolation and disconnection of the main power line through fuses and elastic components can cut off the power supply in time and improve reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an axial view of the schematic diagram of the structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 The top view of

[0019] Figure 3 For this utility model Figure 1 Front view of

[0020] Figure 4 For this utility model Figure 3 Right side view of section A.

[0021] Markings in the attached figure: 1. grounding box; 2. socket group; 3. phase line grounding mechanism; 4. power main line; 5. external frame; 6. spring one; 7. conductive plate; 8. terminal block; 9. spring two; 10. base; 11. insulating spacer; 12. fuse; 13. hinge; 14. box cover; 15. locking ring; 16. pin; 17. pin rack; 18. handle; 19. opening guide; 20. information plate; 21. carrying handle. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example

[0024] See also Figure 1-4 A phase line grounding structure of a substation capable of automatically cutting off power supply, [including xx], including a grounding box 1, a socket group 2, a phase line grounding mechanism 3, a power main line 4, an external frame 5, a spring 1 6, a conductive plate 7, a terminal block 8, a spring 2 9, a base 10, an insulating spacer 11 and a fuse 12, a phase line grounding mechanism 3 is arranged on the right side inside the grounding box 1, a socket group 2 is arranged on the input end of the phase line grounding mechanism 3 on the front side of the grounding box 1, and a power main line 4 is also arranged between the grounding box 1 and the phase line grounding mechanism 3, an external frame 5 is connected to the left middle side inside the grounding box 1, the power main line 4 is in a cut-off state, and the cut-off side of the power main line 4 is placed inside the external frame 5, and the cut-off sides of the power main line 4 are respectively connected to the outer ends of a group of conductive plates 7, and the outer sides of the two groups of conductive plates 7 are respectively connected to the left and right sides of the inner side of the external frame 5 through a group of springs 1 6, and a terminal block 8 is also arranged on the outer side of the phase line grounding mechanism 3 , the terminal block 8 is placed at the bottom of the external frame 5, the top of the terminal block 8 is connected to the bottom of the base 10 through the spring 2 9, a fusible wire 12 is also connected between the terminal block 8 and the base 10, and the top of the base 10 is connected to the bottom of the insulating isolation plate 11; when the external frame 5 is connected, the two groups of conductive plates 7 are fitted together by the elastic action of the two groups of springs 6, so that the power main line 4 is in a connected state, the base 10 is connected through the fusible wire 12 so that the insulating isolation plate 11 is in the lower position, the grounding box 1 is installed in the corresponding position, and is electrically connected to the outside through the socket group 2, and the phase line grounding is formed through the phase line grounding mechanism 3. When an emergency occurs, the internal current changes, and the fusible wire 12 is melted through the terminal block 8, so that the spring 2 9 acts on the base 10 to support it upward, so that the insulating isolation plate 11 moves up to overcome the spring 6 to separate the two groups of conductive plates 7, thereby disconnecting the power main line 4, thereby cutting off the power supply and avoiding abnormalities.

[0025] It also includes an opening guide 19, and the bottom end of each group of conductive plates 7 is connected to the top end of a group of bases 10 respectively; the lower side can be forked through two groups of opening guides 19 to facilitate the upward insertion of the insulating isolation sheet 11, thereby improving practicality.

[0026] It also includes a hinge 13, a box cover 14, a locking ring 15, a pin 16 and a pin rack 17. The rear side of the top end of the grounding box 1 is movably connected to the rear side end of the box cover 14 through the hinge 13, the middle front side of the top end of the box cover 14 is rotatably connected to the inner end of the locking ring 15, the output end of the locking ring 15 is connected to one side of the inner end of the pin 16, and the middle front side of the top end of the grounding box 1 is connected to the inner end of the pin rack 17; when the box cover 14 is opened, it is convenient to inspect and maintain the internal structure of the grounding box 1. When the box cover 14 is closed for protection under the constraint of the hinge 13, the locking ring 15 can be twisted to rotate the pin 16 and pin it into the pin rack 17, so that the box cover 14 is closed and locked, thereby improving reliability.

[0027] The box cover 14 further comprises a handle 18, and the front end of the right side of the box cover 14 is connected to the inner side of the handle 18; by holding the handle 18, the box cover 14 can be opened and closed, thereby improving convenience.

[0028] The box cover 14 further comprises an information plate 20, and the right rear side of the outer end of the box cover 14 is connected to the inner side of the information plate 20; the device information can be displayed through the information plate 20, which is convenient for reading and auxiliary use, thereby improving convenience.

[0029] The grounding box 1 further comprises a handle 21, and the middle of the left and right sides thereof are respectively connected to the inner sides of a set of handles 21; by holding the two sets of handles 21, the grounding box 1 can be connected and moved, so as to facilitate the moving and loading and unloading operations.

[0030] In summary, when a substation phase line grounding structure capable of automatically cutting off power is used, under the connection of the external frame 5, the two sets of conductive plates 7 are fitted together by the elastic action of the two sets of springs 6, so that the power main line 4 is in a connected state, the base 10 is connected through the fuse 12 so that the insulating isolation sheet 11 is in the lower position, and the grounding box 1 is installed in the corresponding position by holding the two sets of handles 21, and the box cover 14 is closed for protection under the constraint of the hinge 13 by holding the handle sheet 18, and the lock ring 15 is turned to rotate the pin sheet 16 to be pinned into the pin frame 17, so that The box cover 14 is closed and locked, and is electrically connected to the outside through the socket group 2, and the phase line is grounded through the phase line grounding mechanism 3. When an emergency occurs, the internal current changes, and the fuse 12 is melted through the terminal block 8, so that the spring 2 9 acts on the base 10 to support it upward, and the two groups of bases 10 are guided to make the insulating isolation plate 11 move up to overcome the spring 1 6 to separate the two groups of conductive plates 7, so that the power main line 4 is disconnected, thereby cutting off the power supply to avoid abnormalities. In addition, the information of the device can be displayed through the information board 20, which is convenient for reading and auxiliary use.

[0031] The socket set 2 and the phase line grounding mechanism 3 are well-known devices purchased directly from the market by technicians in this field. We only use them here without making any structural or functional improvements, so we will not go into details here.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A substation phase line grounding structure capable of automatically cutting off power supply, characterized in that: The invention comprises a grounding box (1), a socket group (2), a phase line grounding mechanism (3), a power main line (4), an external frame (5), a spring 1 (6), a conductive plate (7), a terminal block (8), a spring 2 (9), a base (10), an insulating spacer (11) and a fuse (12). The phase line grounding mechanism (3) is arranged on the right side of the grounding box (1), the socket group (2) is arranged at the input end of the phase line grounding mechanism (3) on the front side of the grounding box (1), and a power main line (4) is arranged between the grounding box (1) and the phase line grounding mechanism (3). The external frame (5) is connected to the left middle side of the grounding box (1), and the power main line (4) is cut off. The power supply main line (4) is in a state of being cut off, and the cut-off side of the power supply main line (4) is placed inside the external frame (5), and the two cut-off sides of the power supply main line (4) are respectively connected to the outer ends of a group of conductive plates (7), and the outer sides of the two groups of conductive plates (7) are respectively connected to the left and right sides of the inner part of the external frame (5) through a group of springs (6). A wiring seat (8) is also arranged outside the phase line grounding mechanism (3), and the wiring seat (8) is placed at the bottom of the external frame (5). The top of the wiring seat (8) is connected to the bottom of the base (10) through springs (9), and a fuse (12) is also connected between the wiring seat (8) and the base (10), and the top of the base (10) is connected to the bottom of the insulating isolation sheet (11).

2. A substation phase line grounding structure capable of automatically cutting off power supply according to claim 1, characterized in that: It also includes an opening guide (19), and the bottom end of each group of the conductive plates (7) is respectively connected to the top end of a group of bases (10).

3. A substation phase line grounding structure capable of automatically cutting off power supply according to claim 1, characterized in that: The grounding box (1) further comprises a hinge (13), a box cover (14), a locking ring (15), a pin piece (16) and a pin holder (17); the rear side of the top end of the grounding box (1) is movably connected to the rear side end of the box cover (14) via the hinge (13); the middle front side of the top end of the box cover (14) is rotatably connected to the inner end of the locking ring (15); the output end of the locking ring (15) is connected to one side of the inner end of the pin piece (16); and the middle front side of the top end inside the grounding box (1) is connected to the inner end of the pin holder (17).

4. A substation phase line grounding structure capable of automatically cutting off power supply according to claim 3, characterized in that: It also comprises a handle (18), and the front end of the right side of the box cover (14) is connected to the inner side of the handle (18).

5. A substation phase line grounding structure capable of automatically cutting off power supply according to claim 3, characterized in that: It also includes an information plate (20), and the right rear side of the outer end of the box cover (14) is connected to the inner side of the information plate (20).

6. A substation phase line grounding structure capable of automatically cutting off power supply according to claim 1, characterized in that: It also comprises a handle (21), and the middle parts of the left and right sides of the grounding box (1) are respectively connected to the inner sides of a group of handles (21).

Images