CN219800600U - Current transformer, switch equipment and wind power device - Google Patents

Abstract

The utility model relates to a current transformer, a switch device and a wind power device, wherein the current transformer comprises: the cover plate flange is provided with a mounting hole which is arranged in a penetrating way; the support cylinder is fixedly arranged on the cover plate flange and penetrates through the mounting hole; the shielding component is respectively connected with the cover plate flange and the supporting cylinder, and forms a shielding space which is circumferentially arranged along the mounting hole together with the flange cover plate and the supporting cylinder; the mutual inductance coil is sleeved on the supporting cylinder and is positioned in the shielding space. The shell structure and the basin-type insulator structure in the traditional current transformer are eliminated, the width size of the current transformer can be greatly reduced, and the current transformer can be easily installed, practically used, maintained and debugged even in the small inner space of the offshore wind power tower.

Description

Current transformer, switch equipment and wind power device

Technical Field

The utility model relates to the technical field of switching equipment, in particular to a current transformer, switching equipment and a wind power device.

Background

The gas-insulated metal-enclosed switchgear, hereinafter referred to as GIS, has the advantages of small volume, small occupied area, no influence of external environment, safe and reliable operation, simple maintenance, long maintenance period and the like, and combines and seals main elements such as a circuit breaker, a disconnecting switch, a grounding switch, a bus, a transformer, a lightning arrester, a current transformer, terminal configuration and the like in a grounded metal shell, and fills SF gas with certain pressure as an insulating medium and an arc extinguishing medium.

The current transformer is an important component of the GIS and is generally composed of a current transformer shell, a current transformer coil, a coil clamping device, a supporting device and other modules. The current transformer shell is connected with the basin-type insulators at two sides and is fixed in the GIS, and the basin-type insulators are large in size, so that the current transformer and the GIS are large in size.

The offshore wind power generation is to convert kinetic energy of wind into electric energy, the wind energy is clean and pollution-free renewable energy, in the process of wind power generation, the offshore wind power tower is required to be used for supporting a wind power generation unit, and because the inside of the offshore wind power tower is generally smaller, the GIS with larger volume is not convenient to assemble in the offshore wind power tower.

Disclosure of Invention

Based on the above, it is necessary to provide a current transformer, a switchgear and a wind power device for solving the problem that a large GIS is inconvenient to assemble in an offshore wind power tower.

A current transformer, comprising:

the cover plate flange is provided with a mounting hole which is arranged in a penetrating way;

the support cylinder is fixedly arranged on the cover plate flange and penetrates through the mounting hole;

the shielding component is respectively connected with the cover plate flange and the supporting cylinder, and forms a shielding space which is circumferentially arranged along the mounting hole in a surrounding manner together with the cover plate flange and the supporting cylinder;

and the mutual inductance coil is sleeved on the supporting cylinder and is positioned in the shielding space.

In one embodiment, the shielding assembly comprises a first shielding piece and a second shielding piece, one end of the first shielding piece is fixedly mounted on the cover plate flange, and the other end of the first shielding piece extends lengthwise along the axial direction of the mounting hole;

one end of the second shielding piece is fixedly arranged on one end of the supporting cylinder, which is away from the cover plate flange, and is bent towards one end of the first shielding piece, which is away from the cover plate flange.

In one embodiment, the supporting cylinder comprises a supporting part and a fixing part, the supporting part is cylindrical and penetrates through the mounting hole, and the fixing part is outwards turned over to be arranged at one end of the supporting part and fixedly connected with one side, deviating from the mutual inductance coil, of the cover plate flange.

In one embodiment, the current transformer further comprises a fastener, wherein the fixing portion is provided with a fixing hole, and the fastener penetrates through the fixing hole and fixedly connects the fixing portion with the cover plate flange.

In one embodiment, the support cylinder, the shielding assembly and the mutual inductance coil form one mutual inductance structure;

the cover plate flange is provided with a plurality of mounting holes, the mutual inductance structure comprises a plurality of mounting holes and corresponds to the mounting holes one by one, and each supporting cylinder of the mutual inductance structure penetrates through the corresponding mounting hole.

In one embodiment, the current transformer further comprises a fixing flange and a connecting piece, wherein the fixing flange and the cover plate flange are arranged at intervals, and the connecting piece is connected with one side, away from the mutual inductance coil, of the fixing flange and the cover plate flange.

In one embodiment, the connecting elements comprise a plurality of connecting elements which are arranged at intervals along the circumference of the fixing flange.

A switching device comprising a current transformer as claimed in any one of the preceding claims.

In one embodiment, the current transformer further comprises a fixing flange and a connecting piece, wherein the fixing flange and the cover plate flange are arranged at intervals, and the connecting piece is connected with one side, away from the mutual inductance coil, of the fixing flange and the cover plate flange;

the switching device further comprises a circuit breaker, the circuit breaker comprises a circuit breaker shell, and the fixing flange is fixedly installed on the circuit breaker shell.

A wind power plant comprising a switchgear as claimed in any one of the preceding claims.

Above-mentioned current transformer supports mutual-inductance coil jointly through apron flange and support section of thick bamboo to the shell structure in traditional current transformer has been cancelled, and the shielding space that forms through shielding assembly protects the coil, thereby has cancelled the structure of basin-type insulator in the traditional current transformer. Therefore, the structure of the shell and the basin-type insulator in the traditional current transformer is canceled, the width size of the current transformer can be greatly reduced, and the current transformer can be easily installed, practical, maintained and debugged even in the small inner space of the offshore wind power tower.

Drawings

FIG. 1 is a schematic diagram of a current transformer according to some embodiments of the present utility model;

fig. 2 is a schematic diagram of the current transformer installed in the circuit breaker in the embodiment of fig. 1.

Reference numerals illustrate:

a cover flange 10; a mounting hole 11;

a support cylinder 20; a support portion 21; a fixing portion 22; a fastener 23; a fixing hole 24;

a shielding assembly 30; a first shield 31; a second shield 32;

a mutual inductance coil 40; a mutual inductance structure 41;

a fixing flange 50; a connecting member 51;

a breaker housing 60; a conductor 61.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1 and 2, a current transformer according to an embodiment of the present utility model includes: the cover flange 10, the support cylinder 20, the shielding assembly 30 and the mutual inductance coil 40.

The cover plate flange 10 is provided with a mounting hole 11 which is arranged in a penetrating manner, the support cylinder 20 is fixedly arranged on the cover plate flange 10 and penetrates through the mounting hole 11, the shielding component 30 is respectively connected with the cover plate flange 10 and the support cylinder 20 and forms a shielding space which is arranged along the circumferential direction of the mounting hole 11 in a surrounding manner together with the cover plate flange 10 and the support cylinder 20, and the mutual inductance coil 40 is sleeved on the support cylinder 20 and is positioned in the shielding space.

In the actual use process, the conductor 61 needing to measure current penetrates through the support cylinder 20, when a large current passes through the conductor 61, the induction coil sleeved on the support cylinder 20 induces the large current to form a small current, and the small current can supply current to the instrument and the relay protection of the middle instrument in the secondary system. The shielding space formed by the shielding assembly 30 can protect the coil from the influence of external strong magnetic signals or high-frequency signals, so that the value of the small current is inaccurate.

The current transformer supports the mutual inductor 40 through the cover plate flange 10 and the supporting cylinder 20, so that a shell structure in the traditional current transformer is eliminated, and the coil is protected through a shielding space formed by the shielding assembly 30, so that the structure of a basin-type insulator in the traditional current transformer is eliminated. Therefore, the structure of the shell and the basin-type insulator in the traditional current transformer is canceled, the width size of the current transformer can be greatly reduced, and the current transformer can be easily installed, practical, maintained and debugged even in the small inner space of the offshore wind power tower.

In some embodiments of the present utility model, the shielding assembly 30 includes a first shielding member 31 and a second shielding member 32, one end of the first shielding member 31 is fixedly mounted on the cover flange 10, the other end extends lengthwise along the axial direction of the mounting hole 11, and one end of the second shielding member 32 is fixedly mounted on the end of the support cylinder 20 facing away from the cover flange 10 and is bent toward the end of the first shielding member 31 facing away from the cover flange 10. In particular to the embodiment of fig. 1, when the transformer coil 40 is sleeved on the support cylinder 20, the cover flange 10 is located on the right side of the transformer coil 40, the second shielding member 32 is located on the left side of the transformer coil 40, the support cylinder 20 is located below the transformer coil 40, and the first shielding member 31 is located above the transformer coil 40, so that the first shielding member 31, the second shielding member 32, the support cylinder 20 and the cover flange 10 together form a shielding space for protecting the transformer coil 40.

Optionally, the first shield 31 is fixed to the cover flange 10 by oxidation screws, and the second shield 32 is fixed to the support cylinder 20 by loose core wicker. In other embodiments, the first shielding member 31 and the second shielding member 32 may be fixed to the cover flange 10 or the support cylinder 20 by bonding, etc., which is not limited herein.

Further, the mutual inductance coil 40 is integrally cast on the supporting cylinder 20, and in other embodiments, the mutual inductance coil 40 may be fixed on the supporting cylinder 20 by bonding, etc., which is not limited herein.

In some embodiments of the present utility model, the supporting cylinder 20 includes a supporting portion 21 and a fixing portion 22, where the supporting portion 21 is cylindrical and penetrates through the mounting hole 11, and the fixing portion 22 is disposed at one end of the supporting portion 21 in an everting manner, and is fixedly connected to a side of the cover flange 10 facing away from the mutual inductance coil 40. The supporting portion 21 is used for penetrating the conductor 61 to be measured, and the fixing portion 22 is used for fixing the supporting portion 21 on the cover flange 10, and the contact area between the supporting cylinder 20 and the cover flange 10 can be increased through the fixing portion 22, so that the connection effect between the supporting cylinder 20 and the cover flange 10 is improved.

In some embodiments, the current transformer further includes a fastening member 23, and the fixing portion 22 is provided with a fixing hole 24, and the fastening member 23 is disposed through the fixing hole 24 and fixedly connects the fixing portion 22 with the cover flange 10. Optionally, the fastening member is a bolt, one side of the cover flange 10 is abutted against the mutual inductor 40, and the other side is provided with a threaded hole, and the bolt passes through the fixing hole 24 to be in threaded connection with the threaded hole, so that the fixing portion 22 is fixed on the cover flange 10.

In some embodiments of the present utility model, the current transformer often needs to measure the current of a plurality of conductors 61 at the same time, and for this purpose, the support cylinder 20, the shielding assembly 30 and the mutual inductance coil 40 form a mutual inductance structure 41, and the current transformer includes a plurality of mutual inductance structures 41, each mutual inductance structure 41 corresponds to one of the conductors 61, and the conductors 61 are inserted through the support cylinder 20 corresponding to the mutual inductance structure 41 so as to measure the current of the conductor 61 through the corresponding mutual inductance structure 41.

In order to install the plurality of mutual inductance structures 41, a plurality of mounting holes 11 are formed in the cover flange 10 and correspond to the plurality of mounting holes 11 one by one, the supporting cylinder 20 of each mutual inductance structure 41 is arranged in the corresponding mounting hole 11 in a penetrating manner, and the supporting cylinder 20 and the shielding assembly 30 of each mutual inductance structure 41 are connected with the cover flange 10. Thus, the plurality of mutual inductance structures 41 are fixedly mounted on one cover plate flange 10, and a supporting structure is not required to be arranged on each mutual inductance structure 41, so that the size of the current transformer is further reduced. Alternatively, the mutual inductance structure 41 includes three, and the three mutual inductance structures 41 are circumferentially spaced around the axis of the cover flange 10.

In some embodiments of the present utility model, the current transformer further includes a fixing flange 50 and a connecting piece 51, where the connecting piece 51 connects the fixing flange 50 and a side of the cover flange 10 facing away from the mutual inductance coil 40, and in actual use, the fixing flange 50 is installed on a casing of the switchgear, and after the connecting piece 51 is connected to the cover flange 10, the plurality of mutual inductance structures 41 on the cover flange 10 are all in a suspended state, so that not only the penetrating of the conductor 61 can be facilitated, but also the distribution of the electric field can be optimized.

In some embodiments, the connecting members 51 include a plurality of connecting members 51 arranged at intervals along the circumference of the fixing flange 50, and since the side of the cover flange 10 facing away from the transformer coil 40 is required to be connected to the fixing portion 22 of the supporting cylinder 20, the plurality of connecting members 51 arranged at intervals can be avoided from the fixing portion 22. Alternatively, the connection member 51 includes three.

The embodiment of the utility model also provides a switch device, which comprises the current transformer in any embodiment, and the structure of the shell and the basin-type insulator in the traditional current transformer is eliminated, so that the width size of the current transformer can be greatly reduced, and the size of the switch device can be reduced, so that the switch device can be better suitable for a smaller internal space of an offshore wind power tower.

From the above, the current transformer eliminates the shell structure in the traditional current transformer, so that the current transformer can be installed in other shells of the switching equipment, thereby further saving the volume of the switching equipment. Specifically, in some embodiments of the present utility model, the switching device further includes a circuit breaker including a circuit breaker housing 60, and the fixing flange 50 is fixedly installed on the circuit breaker housing 60 to fix the current transformer within the circuit breaker, thereby reducing the size of the switching device.

The embodiment of the utility model also provides a wind power device which comprises the switch equipment in any embodiment, and the volume of the switch equipment is reduced through the current transformer, so that the wind power device can be suitable for the wind power device for offshore wind power with smaller installation space.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A current transformer, the current transformer comprising:

the cover plate flange (10) is provided with a mounting hole (11) which is arranged in a penetrating way;

the support cylinder (20) is fixedly arranged on the cover plate flange (10) and penetrates through the mounting hole (11);

the shielding assembly (30) is connected with the cover plate flange (10) and the supporting cylinder (20) and is surrounded with the cover plate flange (10) and the supporting cylinder (20) together to form a shielding space which is circumferentially arranged along the mounting hole (11);

and the mutual inductance coil (40) is sleeved on the supporting cylinder (20) and is positioned in the shielding space.

2. The current transformer according to claim 1, wherein the shielding assembly (30) comprises a first shielding member (31) and a second shielding member (32), one end of the first shielding member (31) is fixedly mounted to the cover flange (10), and the other end extends lengthwise along the axial direction of the mounting hole (11);

one end of the second shielding piece (32) is fixedly arranged on one end of the supporting cylinder (20) which is away from the cover plate flange (10), and is bent towards one end of the first shielding piece (31) which is away from the cover plate flange (10).

3. The current transformer according to claim 1, wherein the supporting cylinder (20) comprises a supporting part (21) and a fixing part (22), the supporting part (21) is cylindrical and penetrates through the mounting hole (11), and the fixing part (22) is outwards turned over at one end of the supporting part (21) and is fixedly connected with one side of the cover flange (10) away from the mutual inductance coil (40).

4. A current transformer according to claim 3, further comprising a fastener (23), wherein the fixing portion (22) is provided with a fixing hole (24), and the fastener (23) is arranged in the fixing hole (24) in a penetrating manner and fixedly connects the fixing portion (22) with the cover flange (10).

5. The current transformer according to claim 1, wherein the support cylinder (20), the shielding assembly (30) and the mutual inductance coil (40) constitute one mutual inductance structure (41);

a plurality of mounting holes (11) are formed in the cover plate flange (10), the mutual inductance structure (41) comprises a plurality of mounting holes (11) and corresponds to the mounting holes (11) one by one, and the supporting cylinder (20) of each mutual inductance structure (41) penetrates through the corresponding mounting hole (11).

6. The current transformer according to claim 1, further comprising a mounting flange (50) and a connecting element (51), the mounting flange (50) being arranged at a distance from the cover flange (10), the connecting element (51) connecting the mounting flange (50) to a side of the cover flange (10) facing away from the transformer coil (40).

7. The current transformer according to claim 6, wherein the connection member (51) includes a plurality of connection members (51) arranged at intervals along a circumferential direction of the fixing flange (50).

8. A switching device comprising a current transformer as claimed in any one of claims 1-7.

9. The switching device according to claim 8, characterized in that the current transformer further comprises a fixing flange (50) and a connecting piece (51), the fixing flange (50) being arranged at a distance from the cover flange (10), the connecting piece (51) connecting the fixing flange (50) to a side of the cover flange (10) facing away from the transformer coil (40);

the switchgear also comprises a circuit breaker comprising a circuit breaker housing (60), the fixing flange (50) being fixedly mounted on the circuit breaker housing (60).

10. Wind power plant, characterized by comprising a switching device according to any of claims 8-9.