CN220138101U - Ground screen structure and reactor - Google Patents

Abstract

The utility model provides a ground shield structure and a reactor, which are used for carrying out electrostatic shielding on iron core cakes of the reactor, wherein the ground shield structure comprises an inner mounting cylinder, the inner mounting cylinder is made of insulating materials, and the inner mounting cylinder is used for being sleeved on a plurality of iron core cakes of the reactor; the conductive structure is wound on the outer surface of the inner mounting cylinder and comprises a plurality of conductive strips and conductive belts, the conductive strips are sequentially sleeved on the inner mounting cylinder along the extending direction of the inner mounting cylinder, and the conductive belts are connected with the conductive strips; wherein, the one end of conducting strip is the free end, and the conductive structure still includes the conductive connection, and the conductive connection sets up the free end at the conducting strip to make the conducting strip pass through conductive connection ground connection, in order to reduce the problem that the eddy current loss of ground screen structure is too high and local overheated among the prior art.

Description

Ground screen structure and reactor

Technical Field

The utility model relates to the technical field of parallel reactors, in particular to a ground screen structure and a reactor.

Background

Currently, the main magnetic circuit of a shunt reactor is generally composed of a plurality of core cakes with air gaps. These core cakes cannot be reliably grounded by themselves for structural reasons. To avoid its floating discharge in high electric fields, it is necessary to electrostatically shield it with an additional ground shield, which itself is grounded through a grounded copper wire.

Because the diffraction magnetic flux at the air gap of the shunt reactor iron core cake is large, the amplitude component of the magnetic flux leakage is large. Therefore, if the ground screen with the traditional structure is adopted, the eddy current loss induced on the copper strip of the ground screen is very large, so that on one hand, the total loss of the reactor is increased, and the energy-saving operation of a product is not facilitated; on the other hand, the copper strips on the ground screen also present a local risk of overheating, jeopardizing the long-term reliable operation of the product.

Disclosure of Invention

The utility model mainly aims to provide a ground shield structure and a reactor, so that the problems of excessive eddy current loss and local overheating of the ground shield structure in the prior art are reduced.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a ground shield structure for electrostatically shielding a core cake of a reactor, comprising an inner mounting cylinder made of an insulating material for being sleeved on a plurality of core cakes of the reactor; the conductive structure is wound on the outer surface of the inner mounting cylinder and comprises a plurality of conductive strips and conductive belts, the conductive strips are sequentially sleeved on the inner mounting cylinder along the extending direction of the inner mounting cylinder, and the conductive belts are connected with the conductive strips; the conductive structure further comprises a conductive connector, wherein the conductive connector is arranged at the free end of the conductive belt, so that the conductive belt is grounded through the conductive connector.

Further, each conductive strip is made of copper material; and/or each conducting strip is a circular strip, and each conducting strip is arranged around the inner mounting cylinder.

Further, the plurality of conductive strips are arranged in one-to-one correspondence with the plurality of core cakes, and each conductive strip is arranged opposite to the middle part of the outer peripheral surface of the corresponding core cake.

Further, the conductive tape is made of a copper material; and/or the conducting strips are copper braid strips, and the conducting strips are connected with the conducting strips.

Further, a plurality of conductive strips are arranged in parallel and at intervals, and the conductive strips extend along the extending direction of the inner mounting cylinder and are respectively connected with the conductive strips.

Further, the free end of the conductive strip protrudes from the end face of the inner mounting cylinder.

Further, the ground screen structure further comprises a first mounting cylinder made of conductive materials, the first mounting cylinder is sleeved on the outer sides of the inner mounting cylinder and the conductive structure, and the first mounting cylinder is connected with the conductive strips and the conductive strips respectively.

Further, the ground screen structure further comprises a second installation cylinder, the second installation cylinder is made of cable paper, and the second installation cylinder is sleeved on the outer side of the first installation cylinder and is in contact with the outer surface of the first installation cylinder.

Further, the ground screen structure further comprises an outer mounting cylinder made of insulating materials, and the outer mounting cylinder is sleeved on the outer side of the second mounting cylinder and is in contact with the outer surface of the second mounting cylinder.

According to another aspect of the present utility model, there is provided a reactor including a plurality of core cakes and a ground shield structure sleeved on the plurality of core cakes, the ground shield structure being the above-mentioned ground shield structure.

By applying the technical scheme of the utility model, the inner mounting cylinder and the conductive structure are sequentially sleeved on the outer surfaces of the iron core cakes of the reactor, static electricity generated by the iron core cakes can be isolated through the inner mounting cylinder made of insulating materials, the conductive strips and the conductive strips which are made of conductive materials in the conductive structure are sleeved on the inner mounting cylinder, the conductive strips are sequentially sleeved along the extending direction of the inner mounting cylinder, the conductive strips are connected with the conductive strips, a conductive joint is further arranged at one end of the conductive strip and is used for grounding, so that static electricity generated by the iron core cakes can be led into the conductive strips and the conductive strip through the conductive structure, and then the static electricity is led into the ground through the conductive joint, so that the problems of overhigh eddy current loss and local overheating of the ground screen structure in the prior art are solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic structural view of an inner mounting cylinder and conductive structure provided in accordance with an embodiment of a ground shield structure of the present utility model;

FIG. 2 shows a schematic structural view of a conductive structure provided in accordance with an embodiment of the ground shield structure of the present utility model;

FIG. 3 shows a schematic view of a structure provided by an embodiment of a ground screen structure according to the present utility model;

fig. 4 shows a partial cross-sectional view provided by an embodiment of a floor screen structure according to the present utility model.

Wherein the above figures include the following reference numerals:

1. an inner mounting cylinder; 10. a conductive structure; 11. a conductive strip; 12. a conductive tape; 13. a conductive contact; 20. a first mounting cylinder; 30. a second mounting cylinder; 40. and an outer mounting cylinder.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1 to 4, the technical scheme of the present utility model provides a ground shield structure for electrostatically shielding iron core cakes of a reactor, comprising an inner mounting cylinder 1, wherein the inner mounting cylinder 1 is made of an insulating material, and the inner mounting cylinder 1 is used for sleeving a plurality of iron core cakes of the reactor; the conductive structure 10 is wound on the outer surface of the inner mounting cylinder 1, the conductive structure 10 comprises a plurality of conductive strips 11 and conductive strips 12, the conductive strips 11 are sequentially sleeved on the inner mounting cylinder 1 along the length extending direction of the inner mounting cylinder 1, and the conductive strips 12 are connected with the conductive strips 11; wherein, one end of the conductive strip 12 is a free end, the conductive structure 10 further includes a conductive contact 13, and the conductive contact 13 is disposed at the free end of the conductive strip 12, so that the conductive strip 12 is grounded through the conductive contact 13.

Therefore, the inner installation cylinder 1 which is made of the insulating material paper board and has the diameter matched with that of the reactor core cake is sleeved on the outer surface of the core cake, static electricity generated by the plurality of core cakes is isolated, the plurality of conductive strips 11 and the conductive strips 12 which are made of conductive materials in the conductive structure 10 are sleeved on the inner installation cylinder 1, the plurality of conductive strips 11 are sequentially sleeved on the outer surface of the inner installation cylinder 1 along the length extending direction of the inner installation cylinder 1, the conductive strips 12 and the plurality of conductive strips 11 are connected through welding, static electricity which is introduced into the plurality of conductive strips 11 can be introduced into the inner installation cylinder by utilizing the conductive strips 12, one end of the conductive strips 12 is further provided with the conductive connector 13 which is used for grounding, static electricity which is introduced into the conductive strips 12 can be fully introduced into the ground, and static electricity generated by the plurality of core cakes can be introduced into the conductive strips 11 and the conductive strips 12 through the conductive connector 13 into the ground, so that the static electricity generated by the plurality of core cakes of the reactor can be shielded, and the problem of high eddy current loss and local overheat in the prior art can be reduced.

In the first embodiment of the present utility model, each of the conductive strips 11 is made of a copper material; the conductive strips 11 may be made of a copper material having good conductivity so as to better introduce static electricity generated from the plurality of core cakes into the ground and to realize electrostatic shielding of the plurality of core cakes.

In the second embodiment of the present utility model, each of the conductive strips 11 is a circular strip, and each of the conductive strips 11 is disposed around the inner mounting cylinder 1; in this way, static electricity generated by a plurality of iron core cakes can be better introduced and underground through the conductive strips 11 of the circular strips respectively sleeved on the inner mounting cylinder 1, and the diameter of the conductive strip 11 of each circular strip is matched with the diameter of the inner mounting cylinder 1 and sleeved on the outer surface of the inner mounting cylinder 1, so that electrostatic shielding of the plurality of iron core cakes is completed.

In order to realize that the plurality of conductive strips 11 are respectively sleeved on the outer surface of the inner mounting cylinder 1, the plurality of conductive strips 11 can introduce static electricity generated by a plurality of iron core cakes and can effectively shield the static electricity, the plurality of conductive strips 11 are arranged in one-to-one correspondence with the plurality of iron core cakes, and each conductive strip 11 is arranged opposite to the middle part of the outer peripheral surface of the corresponding iron core cake; in this way, each conductive strip 11 can respectively correspond to each iron core cake and lead the static generated by the conductive strip to each conductive strip 11, and each conductive strip 11 is arranged on the outer surface of the inner installation cylinder 1 corresponding to the middle part of the outer peripheral surface of each iron core cake, and can be arranged in the middle part of the outer peripheral surface of one iron core cake through one conductive strip 11, so that the conductive strip 11 can better lead the static generated by one iron core cake, and further lead the static generated by a plurality of iron core cakes together through a plurality of conductive strips 11 and lead the static generated by a plurality of iron core cakes into the ground through the conductive strip 12, thereby realizing electrostatic shielding of the iron core cakes.

In a third embodiment of the utility model, the conductive strip 12 is made of copper material; in this way, the conductive tape 12 can be made of copper material with good conductivity, so that static electricity generated from the plurality of core cakes introduced by the plurality of conductive strips 11 can be better generated and introduced into the ground through the conductive connector 13, thereby realizing electrostatic shielding of the plurality of core cakes.

In a fourth embodiment of the utility model, the conductive strips 12 are copper braids, the conductive strips 12 being connected to each conductive strip 11; thus, the conductive tape 12 is formed by braiding a plurality of copper filaments, and static electricity introduced from the plurality of conductive strips 11 can be introduced into the ground through the copper braid, thereby realizing electrostatic shielding.

In order to realize that static electricity generated by each of the plurality of core cakes can be respectively introduced and collected, the plurality of conductive strips 11 are arranged in parallel and at intervals, and the conductive strips 12 extend along the length extending direction of the inner mounting cylinder 1 and are respectively connected with each conductive strip 11, so that static electricity generated by each core cake can be conveniently introduced by arranging each conductive strip 11 in parallel and corresponding to each core cake, and then the static electricity generated by each core cake is introduced to the conductive strips 12 extending along the extending direction of the inner mounting cylinder 1 and respectively connected with each conductive strip 11, and the static electricity introduced between the plurality of conductive strips 11 can circulate mutually through the conductive strips 12, so that the static electricity generated by the plurality of core cakes can be connected into the ground, and electrostatic shielding of the plurality of core cakes is realized.

As shown in fig. 1, the free end of the conductive strip 12 protrudes from the end face of the inner mounting cylinder 1; the arrangement is such that the conductive contacts 13 provided at the free ends of the conductive strips 12 are sufficient to contact the ground and static electricity introduced to the conductive strips 12 can be introduced into the ground through the conductive contacts 13 to shield static electricity generated from the core cake.

Further, the ground screen structure further comprises a first installation cylinder 20, the first installation cylinder 20 is made of conductive materials, the first installation cylinder 20 is sleeved outside the inner installation cylinder 1 and the conductive structure 10, and the first installation cylinder 20 is respectively connected with the plurality of conductive strips 11 and the conductive strips 12; so set up, first installation section of thick bamboo 20 is made by carbon black conductive paper, and the diameter matches with interior installation section of thick bamboo 1, set up its cover on the surface of interior installation section of thick bamboo 1, and cover on a plurality of all conducting bars 11 and conducting strip 12, and the terminal surface at the both ends of first installation section of thick bamboo 20 is parallel and level with the terminal surface at interior installation section of thick bamboo 1, can be through the first installation section of thick bamboo 20 of being made by carbon black conductive paper of cover setting on the conductive structure 10 surface, can introduce the static of part by conductive structure 10 introduction, in order to prevent conductive structure 10 when introducing the static that produces by a plurality of iron core cakes, local temperature is too high and the eddy current loss of overall structure is too high, the problem that the local overheat risk of conductive structure 10 can appear and lead to can not reliably operate for a long time.

Since the first mounting cylinder 20 is made of carbon black conductive paper, it is also necessary to seal the insulating layer of the conductive paper to prevent moisture and other substances from entering the conductive paper and damaging the insulating layer of the conductive paper, and the ground shield structure further includes a second mounting cylinder 30, the second mounting cylinder 30 being made of cable paper, the second mounting cylinder 30 being sleeved outside the first mounting cylinder 20 and contacting the outer surface of the first mounting cylinder 20; the characteristics that the heat resistance and the insulating properties of the cable paper are good are utilized, the second installation cylinder 30 made of the cable paper is sleeved on the outer surface of the first installation cylinder 20, the first installation cylinder 20 can be protected, static electricity on the first installation cylinder 20 can be prevented from leaking, meanwhile, outside moisture can be prevented from entering the first installation cylinder 20, the first installation cylinder 20 is prevented from being influenced, normal working procedures are further influenced, and accordingly the problems that the eddy current loss of a ground screen structure in the prior art is too high and local overheating are solved.

As can be seen, the ground screen structure further includes an outer mounting cylinder 40, the outer mounting cylinder 40 is made of an insulating material, and the outer mounting cylinder 40 is sleeved outside the second mounting cylinder 30 and contacts with the outer surface of the second mounting cylinder 30; so set up, can be through utilizing the outer mounting cylinder 40 cover that is made by insulating material to establish on the surface of second mounting cylinder 30 to be connected with second mounting cylinder 30, and then so as to make the outermost surface insulation of whole ground screen structure, in order to prevent that static and a plurality of core cake that introduce on the conductive structure 10 produce can leak out, thereby establish the outer mounting cylinder 40 of outermost at the cover and carry out the insulation to whole ground screen structure, in order to prevent that ground screen structure from appearing circumstances such as electric leakage.

By applying the technical scheme of the utility model, the reactor also provides a reactor which comprises a plurality of iron core cakes and a ground screen structure sleeved on the iron core cakes, wherein the ground screen structure is the ground screen structure mentioned in the above.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

the method comprises the steps that a ground screen structure is sleeved on the outer surfaces of a plurality of iron core cakes of the reactor and used for conducting electrostatic shielding on the iron core cakes of the reactor, and the ground screen structure comprises an inner mounting cylinder which is made of insulating materials and is used for being sleeved on the iron core cakes of the reactor; the conductive structure is wound on the outer surface of the inner mounting cylinder and comprises a plurality of conductive strips and conductive belts, the conductive strips are sequentially sleeved on the inner mounting cylinder along the extending direction of the inner mounting cylinder, and the conductive belts are connected with the conductive strips; the conductive structure further comprises a conductive connector, wherein the conductive connector is arranged at the free end of the conductive belt, so that the conductive belt is grounded through the conductive connector; the first installation cylinder is made of conductive materials, is sleeved outside the inner installation cylinder and the conductive structure, and is connected with the conductive strips and the conductive strips respectively; the second installation cylinder is made of cable materials, sleeved on the outer side of the first installation cylinder and contacted with the outer surface of the first installation cylinder; the outer mounting cylinder is made of insulating materials, sleeved on the outer side of the second mounting cylinder and contacted with the outer surface of the second mounting cylinder; the ground shield structure is composed of the inner mounting cylinder, the conductive structure, the first mounting cylinder, the second mounting cylinder and the outer mounting cylinder which are respectively sleeved on the outer surfaces of the plurality of iron core cakes in sequence, so that electrostatic shielding is carried out on the plurality of iron core cakes, and the problems of overhigh eddy current loss and local overheating of the ground shield structure in the prior art are solved.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A ground shield structure for electrostatically shielding a core cake of a reactor, comprising:

an inner mounting cylinder (1), wherein the inner mounting cylinder (1) is made of an insulating material, and the inner mounting cylinder (1) is used for being sleeved on a plurality of iron core cakes of the reactor;

the conductive structure (10) is wound on the outer surface of the inner mounting cylinder (1), the conductive structure (10) comprises a plurality of conductive strips (11) and conductive strips (12), the conductive strips (11) are sequentially sleeved on the inner mounting cylinder (1) along the length extending direction of the inner mounting cylinder (1), and the conductive strips (12) are connected with the conductive strips (11);

wherein, one end of the conductive belt (12) is a free end, the conductive structure (10) further comprises a conductive joint (13), and the conductive joint (13) is arranged at the free end of the conductive belt (12) so that the conductive belt (12) is grounded through the conductive joint (13).

2. The floor structure of claim 1, wherein the floor structure comprises a plurality of panels,

each of the conductive strips (11) is made of copper material; and/or

Each conducting strip (11) is a round strip, and each conducting strip (11) is arranged around the inner mounting cylinder (1).

3. A ground shield structure according to claim 1, wherein the plurality of conductive strips (11) are provided in one-to-one correspondence with the plurality of core cakes, and each of the conductive strips (11) is provided opposite to a middle portion of an outer peripheral surface of the corresponding core cake.

4. The floor structure of claim 1, wherein the floor structure comprises a plurality of panels,

the conductive strip (12) is made of copper material; and/or

The conductive strips (12) are copper woven strips, and the conductive strips (12) are connected with the conductive strips (11).

5. Ground shield structure according to claim 1, characterized in that the plurality of conductive strips (11) are arranged parallel to each other and spaced apart from each other, and that the conductive strips (12) extend in the length extension direction of the inner mounting cylinder (1) and are connected to the respective conductive strips (11).

6. Ground shield structure according to claim 1, characterized in that the free end of the conductive strip (12) protrudes from the end face of the inner mounting cylinder (1).

7. The ground shield structure according to any one of claims 1-6, characterized in that the ground shield structure further comprises a first mounting cylinder (20), the first mounting cylinder (20) is made of conductive material, the first mounting cylinder (20) is sleeved outside the inner mounting cylinder (1) and the conductive structure (10), and the first mounting cylinder (20) is connected with a plurality of conductive strips (11) and conductive strips (12), respectively.

8. The ground shield structure of claim 7, further comprising a second mounting cylinder (30), the second mounting cylinder (30) being made of cable paper, the second mounting cylinder (30) being sleeved outside the first mounting cylinder (20) and being in contact with an outer surface of the first mounting cylinder (20).

9. The ground shield structure of claim 8, further comprising an outer mounting cylinder (40), the outer mounting cylinder (40) being made of an insulating material, the outer mounting cylinder (40) being sleeved outside the second mounting cylinder (30) and being in contact with an outer surface of the second mounting cylinder (30).

10. A reactor comprising a plurality of core cakes and a ground shield structure sleeved on the plurality of core cakes, characterized in that the ground shield structure is the ground shield structure according to any one of claims 1 to 9.