CN219575362U - Three-phase dry-type iron core shunt reactor grounding system - Google Patents
Three-phase dry-type iron core shunt reactor grounding system Download PDFInfo
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- CN219575362U CN219575362U CN202320863221.6U CN202320863221U CN219575362U CN 219575362 U CN219575362 U CN 219575362U CN 202320863221 U CN202320863221 U CN 202320863221U CN 219575362 U CN219575362 U CN 219575362U
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Abstract
The utility model belongs to the field of manufacturing of dry-type iron core reactors, and relates to a three-phase dry-type iron core shunt reactor grounding system, which comprises a clamp grounding structure and an iron core grounding structure, wherein the clamp comprises the following metal structural parts: the upper clamping piece web plate, the lower clamping piece web plate, the AC phase upper cross beam, the B phase upper cross beam, the AC phase lower cross beam, the B phase lower cross beam, the pressing beam, the foot pad, the upper side beam and the lower side beam, and the iron core comprises an upper iron yoke, a lower iron yoke and a core column; the metal structural member of the clamping piece is in insulating connection or electric connection through the fastening bolt, the yoke penetrating screw rod and the pull screw rod, a clamping piece grounding structure is formed, the core column screw rod penetrates through the upper iron yoke, the lower iron yoke and the core column to form an iron core grounding structure through electric connection, the grounding wire is embedded in the core column, the grounding wire is led out and fixedly connected with the upper clamping piece support plate, and the upper clamping piece support plate is welded on the upper clamping piece web plate. The utility model ensures that the iron core, the clamping piece and other metal structural members are reliably grounded, ensures that no circulation exists in the system, and realizes one-point grounding.
Description
Technical Field
The utility model belongs to the field of manufacturing of dry-type iron core reactors, and particularly relates to a grounding system of a three-phase dry-type iron core shunt reactor.
Background
In the running process of the dry iron core reactor, the iron core, the clamping piece and other metal pieces are all in a strong electric field, and under the action of the strong electric field, the iron core, the clamping piece and other metal pieces have higher earth potential. Because the iron core, the clamping piece and other metal parts are in non-uniform magnetic fields, electromotive forces generated by the magnetic fields are not equal, and electric discharge phenomenon can be caused by potential difference between the iron core, the clamping piece and other metal parts, the iron core, the clamping piece and other metal parts must be reliably grounded. In order to prevent the circulation from causing the core and the clamping piece to heat, the core and the clamping piece must be grounded at one point.
Currently, there is no efficient and reliable grounding system specifically directed to three-phase dry-core reactors.
Disclosure of Invention
Aiming at the technical problems, the utility model provides a three-phase dry-type iron core shunt reactor grounding system, which adopts the following technical scheme:
a three-phase dry-type iron core shunt reactor grounding system, includes a clamp ground structure and an iron core ground structure, the clamp contains following metallic structure: the iron core comprises an upper iron yoke, a lower iron yoke and a core column;
the clamp grounding structure is as follows: the AC phase upper cross beam, the compression beam, the upper side beam and the upper clamping piece web are in insulating connection with the upper clamping piece web at the high-pressure side through fastening bolts, and are in electric connection with the upper clamping piece web at the low-pressure side through fastening bolts; the AC phase lower cross beam is in insulating connection with lower clamp web plates of the high-voltage side and the low-voltage side through fastening bolts, the lower side beam and the pad foot are in insulating connection with the lower clamp web plates on the high-voltage side through the fastening bolts, and the lower side beam and the pad foot are in electric connection with the lower clamp web plates on the low-voltage side through the fastening bolts; the B-phase upper cross beam and the B-phase lower cross beam are electrically connected with the high-pressure side and the low-pressure side and the upper clamping piece web and the lower clamping piece web through fastening bolts; the yoke penetrating screw rod passes through the upper clamping piece web plate and the lower clamping piece web plate of the high-voltage side and the low-voltage side respectively and is in insulating connection with the upper clamping piece web plate and the lower clamping piece web plate at the high-voltage side, and is in electric connection with the upper clamping piece web plate and the lower clamping piece web plate at the low-voltage side; the pull screw rod penetrates through the pressing beam, the foot pad, the upper side beam and the lower side beam respectively, the pull screw rod is in insulating connection with the upper clamping piece web plate on the high-voltage side and the low-voltage side, and the pull screw rod is in electric connection with the lower clamping piece web plate on the high-voltage side and the low-voltage side.
The iron core grounding structure is as follows: the core column screw rod passes through the upper iron yoke, the lower iron yoke and the core column, and is respectively and electrically connected with the AC phase upper beam, the B phase upper beam, the AC phase lower beam and the B phase lower beam;
the connection structure of the clamp grounding structure and the iron core grounding structure is as follows: the upper iron yoke is electrically connected with the upper clamping piece web plate through the grounding piece, the lower iron yoke is electrically connected with the lower clamping piece web plate through the grounding piece, the grounding wire is embedded in the core column, the grounding wire is led out and fixedly connected with the upper clamping piece support plate through the bolt, the upper clamping piece support plate is welded on the upper clamping piece web plate, the upper clamping piece support plate is provided with grounding wire holes, and the grounding wire holes are formed in two sides of the core column.
Preferably, the insulating connection structure for realizing the insulating connection is: insulating pipes are additionally arranged on the periphery of the fastening bolt and the periphery of the contact part of the pull screw rod and the metal structural part, and insulating gaskets are additionally arranged between the heads of the fastening bolt and the pull screw rod and the contact part of the metal structural part; an insulating plate is arranged between the upper clamping piece web plate and the AC phase upper beam, between the lower clamping piece web plate and the AC phase lower beam, and between the lower clamping piece web plate and the insulating plate are arranged between the lower clamping piece web plate and the AC phase lower beam.
Preferably, the grounding piece is a tinned copper belt with the thickness of 0.3mm.
The utility model has the beneficial effects that:
the grounding system can ensure that the iron core, the clamping piece and other metal structural members are reliably grounded, and can ensure that the system has no circulation inside, thereby realizing one-point grounding. A reliable grounding system is provided for a dry-type iron core reactor with a complex clamp structure. The grounding system has reasonable design, good reliability and simple process, and has popularization and application values. The clamping piece and other metal pieces form a point grounding system through the electric connection and the insulating connection of the bolts. The reactor core column, the upper iron yoke and the lower iron yoke are respectively connected with the clamping piece at one point through the grounding connecting wire, so that one-point grounding of the iron core is realized.
Drawings
In order to more clearly illustrate the embodiments of the present utility model, or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is apparent that the drawings in the following description are specific embodiments of the utility model and that other drawings within the scope of the utility model may be obtained from these drawings by those skilled in the art without inventive effort.
Fig. 1 is a front view of a three-phase dry-core reactor grounding system of an embodiment of the present utility model;
fig. 2 is a top view of a three-phase dry core reactor grounding system according to an embodiment of the present utility model;
FIG. 3 is a schematic view of a clip and core grounding structure according to an embodiment of the present utility model;
FIG. 4 is a schematic view of a bolt insulated connection structure according to an embodiment of the utility model;
FIG. 5 is a schematic view of a bolt electrical connection structure according to an embodiment of the present utility model;
the upper clamping piece web plate 1, the upper iron yoke 2, the core column 3, the core column 4, the lower iron yoke 5, the lower clamping piece web plate 6, the AC phase upper beam 7, the press beam 8, the B phase upper beam 9, the AC phase lower beam 10, the pad foot 11, the B phase lower beam 12, the pull screw rod 13, the yoke penetrating screw rod 14, the upper side beam 15, the insulating washer 16, the insulating tube 17, the grounding piece 18, the clamping piece support plate 19, the grounding wire 20, the insulating plate 21, the fastening bolt 22, the core column screw rod 23 and the lower side beam.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and complete in conjunction with the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the present utility model.
As shown in fig. 1, a front view of a three-phase dry-type iron core reactor grounding system according to an embodiment of the present utility model; as shown in fig. 2, a top view of a three-phase dry-core reactor grounding system according to an embodiment of the present utility model is shown. A three-phase dry-type iron core shunt reactor grounding system comprises a clamping piece grounding structure and an iron core grounding structure.
The clamping piece comprises upper and lower clamping piece webs (an upper clamping piece web 1 and a lower clamping piece web 5), an upper cross beam and a lower cross beam (an AC upper cross beam 6, a B upper cross beam 8, an AC lower cross beam 9 and a B lower cross beam 11), a pressing beam 7, a foot pad 10, side beams (an upper side beam 14 and a lower side beam 23) and other metal structural members, and the upper and lower clamping piece webs are fixedly installed into a whole through connecting pieces such as a fastening bolt 21, a core column screw rod 22, a yoke penetrating screw rod 13, a pulling screw rod 12 and the like. The metal structural members such as the AC phase upper cross beam 6, the press beam 7, the upper side beam 14 and the like are in insulating connection with the upper clamping piece web 1 through fastening bolts 21 on the high-voltage side, and are in electric connection with the upper clamping piece web 1 through fastening bolts 21 on the low-voltage side; the AC phase lower cross beam 9 is in insulating connection with the lower clamping piece web 5 of the high-voltage side and the low-voltage side through a fastening bolt 21, the lower side beam 23 and the cushion foot 10 are in insulating connection with the lower clamping piece web 5 on the high-voltage side through the fastening bolt 21, and are in electric connection with the lower clamping piece web 5 on the low-voltage side through the fastening bolt 21; the B-phase upper beam 8 and the B-phase lower beam 11 are electrically connected to both the high-pressure side and the low-pressure side with the upper clip web 1 and the lower clip web 5 by fastening bolts 21.
An insulating plate 20 is arranged between the webs of the upper clamping piece and the lower clamping piece, between the upper cross beam and the lower cross beam, between the pressing beam 7 and between the pressing beam and the foot pad 10, so that insulation between the upper and lower clamping piece webs is ensured. The fastening bolt 21 is used for fastening the clamping piece and simultaneously realizing a bolt insulation connection structure of the web plate of the clamping piece and other metal structural members by additionally installing the insulation gasket 15 and the insulation pipe 16, otherwise, the web plate of the clamping piece and other metal structural members are in a bolt electric connection structure.
The iron core comprises an upper iron yoke, a lower iron yoke (an upper iron yoke 2 and a lower iron yoke 4) and a core column 3. The upper and lower yokes are grounded primarily by the electrical connection of the grounding tabs 17 to the upper and lower clamp webs. The grounding plate 17 is a tinned copper belt, and the thickness of the grounding plate is 0.3mm. When the iron core is stacked, the grounding piece 17 is respectively pre-buried in the upper iron yoke 2 and the lower iron yoke 4, the grounding piece 17 is inserted between the two silicon steel sheets, when the iron core is assembled, the grounding wire holes are reserved at the corresponding positions of the webs of the clamping pieces, and the grounding piece 17 and the webs of the clamping pieces are fixedly connected through bolts, so that the connection between the upper iron yoke and the lower iron yoke and the grounding structure of the clamping pieces is realized. The core column 3 is grounded, the grounding wire 19 is embedded in the core column 3, the grounding wire 19 is led out and fixedly connected with the upper clamping piece support plate 18 through bolts, and then the core column is connected with the clamping piece grounding structure. The upper clamping piece support plates 18 are welded on the upper clamping piece web plate 1, and the upper clamping piece support plates 18 are reserved with grounding wire holes and are positioned on two sides of the core column 3.
The yoke penetrating screw 13 penetrates through upper and lower clamping piece webs of the high-voltage side and the low-voltage side and the iron yoke silicon steel sheet, and the yoke penetrating screw 13 is used for firmly fastening the clamping piece webs of the high-voltage side and the low-voltage side and the iron yoke in the horizontal direction. The yoke screws 13 are connected to the upper clip web 1 and the lower clip web 5 in an insulating manner on the high-voltage side, and the yoke screws 13 are connected to the upper clip web 1 and the lower clip web 5 in an electrically insulating manner on the low-voltage side. Eight pull screws 12 are used for clamping the webs of the upper clamping piece and the lower clamping piece in the vertical direction and for connecting and fixing the pressing beam 7, the cushion foot 10 and the upper side beam and the lower side beam. The pull screw rod 12 is in insulating connection with the upper clamping piece web plate 1 at the high-voltage side and the low-voltage side by additionally installing an insulating pipe 16 and an insulating gasket 15; the pull screw 12 is electrically connected with the lower clamping piece web 5 on the high-voltage side and the low-voltage side by a nut and a metal washer through the pull screw 12 without adding an insulating tube 16 and an insulating washer 15.
FIG. 3 is a schematic view of a clip and core grounding structure according to an embodiment of the present utility model; the open circles in fig. 3 represent the bolt insulating connection structure, and the solid circles represent the bolt electrical connection structure. The stem screw 22 is electrically connected with the upper and lower beams of A, B, C three phases, and the stem screw 22 penetrates through the upper and lower iron yokes and the stem 3 for integrally clamping the upper and lower iron yokes and the stem, so that the upper and lower clamping piece webs are connected into a whole. In fig. 3, all of the hollow circles and the solid circles except for the solid circles (representing the stem screws 22) at both ends of the stem 3 represent the positions of the fastening bolts 21.
FIG. 4 is a schematic view of a bolt insulated connection structure according to an embodiment of the utility model; fig. 5 is a schematic view of an electrical connection structure of a bolt according to an embodiment of the present utility model. The bolt electric connection structure has the advantages that the bolt not only plays a fastening role, but also plays an electric conduction role for connecting two sides; the bolt insulation connection structure is characterized in that the bolt is insulated from one side of a metal piece by additionally arranging an insulation pipe 16 and an insulation washer 15. In fig. 5, the structure of the fastening bolt 21 is taken as an example, and similarly, the pull screw 12, the yoke screw 13 and the stem screw 22 are electrically connected to the metal structural member by the screws, and the insulating pipe 16 and the insulating washer 15 are added to the screw end to insulate the screw itself from the metal structural member (the press beam, the pad leg, the cross beam, etc.), and further insulate the clip and the core from the metal structural member.
The whole clamp grounding structure ensures that no loop exists in the whole clamp, is connected with a grounding network through a grounding wire, further realizes one-point grounding, and the iron core grounding structure is connected with the clamp one-point through an upper iron yoke, a lower iron yoke and a core column respectively, so as to realize one-point grounding of the iron core grounding structure. The three-phase dry type iron core reactor grounding system of the embodiment of the utility model is formed by the clamp grounding structure and the iron core grounding structure.
In the embodiments of the present utility model, technical features that are not described in detail are all existing technologies or conventional technical means, and are not described herein.
Finally, it should be noted that: the above examples are only specific embodiments of the present utility model, and are not intended to limit the scope of the present utility model. Those skilled in the art will appreciate that: any person skilled in the art may modify or easily conceive of changes to the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (3)
1. The grounding system of the three-phase dry-type iron core shunt reactor is characterized by comprising a clamping piece grounding structure and an iron core grounding structure, wherein the clamping piece comprises the following metal structural parts: the iron core comprises an upper iron yoke (2), a lower iron yoke (4) and a core column (3);
the clamp grounding structure is as follows: the AC phase upper cross beam (6), the press beam (7), the upper side beam (14) and the upper clamping piece web (1) are connected with the upper clamping piece web (1) in an insulating way through a fastening bolt (21) at the high pressure side, and are electrically connected with the upper clamping piece web (1) through the fastening bolt (21) at the low pressure side; the AC phase lower cross beam (9) is in insulating connection with the lower clamping piece web plates (5) of the high-voltage side and the low-voltage side through a fastening bolt (21), the lower side beam (23) and the cushion foot (10) are in insulating connection with the lower clamping piece web plates (5) on the high-voltage side through the fastening bolt (21), and the lower side beam is in electric connection with the lower clamping piece web plates (5) through the fastening bolt (21); the B-phase upper cross beam (8) and the B-phase lower cross beam (11) are electrically connected with the upper clamping piece web (1) and the lower clamping piece web (5) through fastening bolts (21) and the high-pressure side and the low-pressure side; the yoke penetrating screw rod (13) penetrates through the upper clamping piece web plate (1) and the lower clamping piece web plate (5) of the high-voltage side and the low-voltage side respectively to be connected with the iron yoke silicon steel sheet in an insulating mode, the yoke penetrating screw rod (13) is connected with the upper clamping piece web plate (1) and the lower clamping piece web plate (5) on the high-voltage side, and the yoke penetrating screw rod (13) is electrically connected with the upper clamping piece web plate (1) and the lower clamping piece web plate (5) on the low-voltage side; the pull screw rod (12) penetrates through the pressing beam (7), the foot pad (10), the upper side beam (14) and the lower side beam (23) respectively, the pull screw rod (12) is connected with the upper clamping piece web plate (1) in an insulating way on the high-pressure side and the low-pressure side, and the pull screw rod (12) is electrically connected with the lower clamping piece web plate (5) on the high-pressure side and the low-pressure side;
the iron core grounding structure is as follows: the core column screw rod (22) penetrates through the upper iron yoke (2), the lower iron yoke (4) and the core column (3), and the core column screw rod (22) is electrically connected with the AC phase upper cross beam (6), the B phase upper cross beam (8), the AC phase lower cross beam (9) and the B phase lower cross beam (11) respectively;
the connection structure of the clamp grounding structure and the iron core grounding structure is as follows: the upper iron yoke (2) is electrically connected with the upper clamping piece web plate (1) through the grounding piece (17), the lower iron yoke (4) is electrically connected with the lower clamping piece web plate (5) through the grounding piece (17), the grounding wire (19) is embedded in the core column (3), the grounding wire (19) is led out and fixedly connected with the upper clamping piece support plate (18) through bolts, the upper clamping piece support plate (18) is welded on the upper clamping piece web plate (1), the upper clamping piece support plate (18) is provided with grounding wire holes, and the grounding wire holes are formed in two sides of the core column (3).
2. The grounding system of a three-phase dry-core shunt reactor according to claim 1, wherein the insulating connection structure for realizing the insulating connection is: an insulating pipe (16) is additionally arranged on the periphery of the fastening bolt (21) and the periphery of the contact part of the pull screw rod (12) and the metal structural part, and an insulating gasket (15) is additionally arranged between the head parts of the fastening bolt (21) and the pull screw rod (12) and the contact part of the metal structural part; an insulating plate (20) is arranged between the upper clamping piece web plate (1) and the AC phase upper cross beam (6), between the pressing beam (7) and the B phase upper cross beam (8), and an insulating plate (20) is arranged between the lower clamping piece web plate (5) and the AC phase lower cross beam (9), between the lower clamping piece web plate (10) and the B phase lower cross beam (11).
3. A three-phase dry-core shunt reactor grounding system according to claim 1, characterized in that the grounding plate (17) is tin-plated copper strip with a thickness of 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320863221.6U CN219575362U (en) | 2023-04-13 | 2023-04-13 | Three-phase dry-type iron core shunt reactor grounding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320863221.6U CN219575362U (en) | 2023-04-13 | 2023-04-13 | Three-phase dry-type iron core shunt reactor grounding system |
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| Publication Number | Publication Date |
|---|---|
| CN219575362U true CN219575362U (en) | 2023-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320863221.6U Active CN219575362U (en) | 2023-04-13 | 2023-04-13 | Three-phase dry-type iron core shunt reactor grounding system |
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| Country | Link |
|---|---|
| CN (1) | CN219575362U (en) |
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- 2023-04-13 CN CN202320863221.6U patent/CN219575362U/en active Active
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