CN210925674U - Supporting and fixing device for current transformer - Google Patents

Abstract

The utility model relates to a supporting and fixing device for a current transformer, which comprises a bracket and a clamp which is arranged on the bracket to clamp and fix the current transformer; the clamp comprises a base, a first clamping part and a second clamping part; the base is arranged on the bracket to support the current transformer; the base is provided with an avoidance hole for avoiding the junction box of the current transformer; the first clamping part and the second clamping part are arranged on the base at intervals so as to clamp and fix the current transformer from the axial direction. This a support fixing device for current transformer avoids this current transformer to follow circuit breaker combined floodgate operation vibrations and vibrations, and then can eliminate vibrations and arouse the influence factor of secondary winding lead-out wire broken string among the current transformer, has avoided personnel's injury and equipment damage that current transformer broken string high voltage caused, has also eliminated the protection malfunction risk that causes because of the current transformer broken string, guarantees the normal operating of unit and transmission line.

Description

Supporting and fixing device for current transformer

Technical Field

The utility model relates to an electrical maintenance field, more specifically say, relate to a support fixing device for current transformer.

Background

A400 kV/500kV switching station GIS (gas Insulated switchgear) current transformer (hereinafter referred to as CT) of a large gulf nuclear power station is an IPME1/560-T155 current transformer, and the current transformer comprises a shell, an iron core and a secondary winding which are arranged inside the shell, and a junction box arranged on the outer side wall of the shell. This shell is epoxy resin pouring type structure, and inside iron core comprises the silicon steel sheet, and secondary winding is the single strand copper conductor, evenly closely twines on the iron core, and secondary winding lead-out wire is drawn forth to the terminal box from this shell, is packed by the soft rubber layer parcel of multilayer between iron core and the shell, exists the clearance. The CT through groove is fixed on the GIS shell and sleeved on the periphery of the GIS, and when a breaker of the GIS is switched on and off, the CT can vibrate along with the breaker, the vibration acceleration is 20g, and the duration is 100 ms.

The existing CT mounting mode has the following defects: 1) according to the analysis of the internal structure and the installation mode of the CT, because a gap exists between the iron core and the shell, the iron core and the shell generate relative displacement during vibration, so that the outgoing line part of the secondary winding is under stress, and because the outgoing line is a single-stranded hard copper wire, the stress is concentrated during stress and is not easy to release, and the risk of breaking the CT secondary winding exists; the power failure range required by replacing the current transformer is wide, the shutdown of a unit or a power transmission line can be caused, and the economic loss is huge. 2) The replacement of the CT after the disconnection needs the disassembly of GIS equipment, the risk of preventing foreign matters from entering is high, the overhaul period is long, the requirement on the overhaul process is high, the shutdown of a unit or a power transmission line can be caused, and the economic loss is huge. 3) After the CT is replaced, the GIS voltage withstand test and the starting scheme need to be negotiated with a power grid, uncertainty exists, and the construction period is possibly prolonged.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in providing one kind and can break away from CT and GIS shell for when circuit breaker divide-shut brake operation vibrations, the vibrations can not be followed together to CT, thereby eliminates vibrations and arouses the support fixing device of the influence factor of CT broken string.

The utility model provides a technical scheme that its technical problem adopted is: constructing a supporting and fixing device for a current transformer, which comprises a bracket and a clamp arranged on the bracket for clamping and fixing the current transformer;

the clamp comprises a base, a first clamping part and a second clamping part; the base is arranged on the bracket to support the current transformer; the base is provided with an avoidance hole for avoiding the junction box of the current transformer; the first clamping part and the second clamping part are arranged on the base at intervals so as to clamp and fix the current transformer from the axial direction.

Preferably, the base comprises two base bodies which are arranged at intervals and are in an inverted-L shape, and two baffle plates which are respectively arranged at the upper parts of the two base bodies;

the two baffles are oppositely arranged, and an interval is reserved to form the avoidance hole;

the first clamping part and the second clamping part are axially arranged at two ends of the baffle at intervals.

Preferably, the baffle is an inwards concave arc-shaped structure so as to be attached to the current transformer.

Preferably, the clamp further comprises a connecting assembly connecting the first clamping portion and the second clamping portion.

Preferably, the first clamping portion comprises a first annular body;

the second clamping portion comprises a second annular body arranged opposite to the first annular body;

the connecting assembly is disposed on the first ring body and the second ring body to connect the first ring body and the second ring body.

Preferably, the first ring body comprises a plurality of first clamping plates which are spliced with each other;

the second annular body comprises a plurality of second clamping plates which are mutually spliced;

two ends of the first clamping plate are respectively provided with a first connecting convex part connected with the other first clamping plate; the first connecting convex part is provided with a first through hole;

two ends of the second clamping plate are respectively provided with a second connecting convex part connected with the other second clamping plate;

the second connecting convex part is provided with a second through hole;

the connecting assembly comprises a fastening assembly which is axially arranged and penetrates through the first through hole and the second through hole.

Preferably; the support comprises a support plate and a plurality of support rods arranged on the bottom surface of the support plate at intervals;

the clamp is disposed on the support plate.

Preferably, the supporting rod is a telescopic rod and comprises a first rod body and a second rod body which is telescopically arranged in the first rod body; the second rod body penetrates out of the first rod body, and one end of the second rod body penetrating out of the second rod body is connected with the supporting plate.

Preferably, the supporting plate is provided in plurality, and the supporting plates are arranged on the supporting rod at intervals along the longitudinal direction of the supporting rod.

Preferably, the clamp is detachably connected with the support plate;

or the base of the clamp and the supporting plate are integrally formed.

Implement the utility model discloses a support fixing device for current transformer has following beneficial effect: the supporting and fixing device for the current transformer is characterized in that a clamp is arranged on a support, a first clamping part and a second clamping part are arranged on a base, and an avoidance hole is arranged on the base; therefore, the junction box of the current transformer can be arranged in the avoiding hole, the current transformer is clamped and fixed in the axial direction through the mutual matching of the first clamping part and the second clamping part, the vibration of the current transformer caused by the vibration of the circuit breaker along with the switching-on operation vibration of the circuit breaker is avoided, the influence factor of the breakage of the secondary winding outgoing line in the current transformer caused by the vibration can be eliminated, the personnel injury and the equipment damage caused by the high voltage of the breakage of the current transformer are avoided, the protection misoperation risk caused by the breakage of the current transformer is also eliminated, and the normal operation of a unit and a power transmission line is ensured.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a side view of a support fixture for a current transformer in some embodiments of the present invention;

FIG. 2 is a side view of a bracket of the current transformer of FIG. 1 supporting a fixture;

fig. 3 is a schematic structural view of a support rod of a bracket of the support fixture of the current transformer shown in fig. 2;

FIG. 4 is a front view of a fixture of the support fixture of the current transformer of FIG. 1;

fig. 5 is a schematic structural view of a baffle of the supporting fixture of the current transformer shown in fig. 4.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows some preferred embodiments of the supporting and fixing device for a current transformer of the present invention. The supporting and fixing device for the current transformer can be used for supporting and fixing the Current Transformer (CT) 100; the current transformer is convenient to install on this switch station (GIS)200, this current transformer 100 can be dismantled with this switch station 200 and be connected, because this support fixing device's support is fixed when the breaker divide-shut brake operation vibrations of switch station (GIS), this current transformer 100 can not shake along with this breaker operation vibrations, can eliminate vibrations and arouse secondary winding lead-out wire broken string's influence factor in current transformer 100, personnel's injury and equipment damage that the high voltage of 100 broken strings of current transformer caused have been avoided, also eliminated because of the protection malfunction risk that 100 broken strings of current transformer caused, guarantee the normal operating of unit and transmission line.

As shown in fig. 1, in some embodiments, the supporting fixture for a current transformer may include a bracket 10 and a jig 20; the support 10 can be used to support the clamp 20, and the clamp 20 can be installed to further support the current transformer 100, and the clamp 20 can be disposed on the support 10 and can be used to clamp and fix the current transformer 100, so as to prevent the current transformer 100 from vibrating.

As shown in fig. 1 to 3, further, in some embodiments, the support frame 10 may include a support plate 11, and a plurality of support rods 12; the supporting plate 11 may be extended toward a length direction of the circuit breaker, and may be installed with the jig. The plurality of support rods 12 can be arranged at intervals on the bottom surface of the support plate 11, can be detachably connected with the support plate 11, and can be used for supporting the support plate 11; in particular, it can be connected with the supporting plate 11 by providing a connecting component, which can be a bolt. It will be appreciated that in other embodiments, the connection assembly may not be limited to bolts. The support plate 11 is not limited to being detachably connected to the support rod 12, and may be integrally formed with the support rod 12.

Further, in some embodiments, the supporting plate 11 may be made of stainless steel, and it is understood that in other embodiments, the material of the supporting plate 11 is not limited to stainless steel, and may be other metal materials. The support plate 11 may have a rectangular or square shape. The supporting plates 11 may be plural, and the supporting plates 11 may be disposed along the longitudinal direction of the supporting rod 12 at intervals, which may form a multi-layer supporting space for a plurality of clamps to be disposed, so as to support the circuit breakers disposed in a stacked manner. Each support plate and the support rod 12 can be fixed by arranging a connecting component.

Further, in some embodiments, the support rod 12 may be made of stainless steel, and it is understood that in other embodiments, the material of the support rod 12 is not limited to stainless steel, and may be other metal materials. The supporting rod 12 can be a telescopic rod, the supporting height of which can be adjusted by stretching, and the supporting rod 12 can include a first rod 121 and a second rod 122; the inner dimension of the first rod 121 may be larger than the outer dimension of the second rod 122, and the second rod 122 may pass through the inner dimension. The second rod 122 is telescopically disposed in the first rod 121, and can perform telescopic movement along the length direction of the first rod 121, and can penetrate through the first rod 121, and one end of the second rod 122 penetrating through the second rod can be connected to the supporting plate 11, so as to adjust the height of the supporting plate 11 by telescopic movement.

Further, in some embodiments, a connecting plate 13 may be disposed between two adjacent support rods 12; the number of the connecting plates 13 between two adjacent support rods 12 may be two, and the two connecting plates may be arranged in a crossing manner, so that the support strength of the support rods 12 may be improved.

Further, in some embodiments, the stand 10 may further include a support 14, the support 14 may be disposed at an end of the support rod 12 away from the support plate 11, may support the support rod 12, and may facilitate the stand 10 to be placed on a bottom surface or some other plane, and the support 14 may have a flat plate shape, and may have a cross-sectional area larger than that of the support rod 12.

Further, in some embodiments, the stand 10 may further include a reinforcing rib 15, the reinforcing rib 15 may be disposed between the support 14 and the supporting rod 12, may be obliquely disposed on the support 14, and may have both ends connected to the support 14 and the supporting rod 12, respectively, which may reinforce the strength of the supporting rod 12.

As shown in fig. 1, 4 and 5, further, in some embodiments, the clamp 20 is detachably disposed on the bracket 10, and the clamp 20 and the bracket 10 can be detachably connected by disposing a connecting assembly. The connecting assembly may be a bolt or otherwise. It will be appreciated that in other embodiments, the clamp 20 may be integrally formed with the holder 10. In some embodiments, the clamp may include a base 21, a first clamping portion 22, and a second clamping portion; the base 21 may be disposed on the bracket 10, which may be used for supporting the current transformer 100, and specifically, may be disposed on the supporting plate 11, which may be detachably connected to the supporting plate 11, and it may be understood that in other embodiments, it may be integrally formed with the supporting plate 11. The base 21 can be used for mounting the first clamping portion 22 and the second clamping portion. The first clamping portion 22 and the second clamping portion may be disposed on the base 21 at an interval, which may clamp and fix the current transformer 100 from an axial direction.

Further, in some embodiments, the base 21 may include two seat bodies 211 and two baffles 212; the two bases 211 can be disposed opposite to each other and spaced apart from each other. The two seat bodies 211 can be in an inverted L shape. The base 211 may be a metal plate with an inverted L-shape, which can be detachably connected to the supporting plate 11 through a connecting component, but it is understood that in other embodiments, it can be welded to the supporting plate 11 and integrally formed with the supporting plate 11. The baffle 212 can be disposed on the upper portion of the base 211, and is disposed corresponding to the base 211 one by one, and the two single plates 212 can be disposed side by side at intervals. The baffle 212 may be a concave arc structure to be attached to the current transformer 100, and in particular, to be attached to the outer surface of the current transformer 100. In some embodiments, the base 21 may be provided with an avoiding hole 213; the avoiding hole 213 may be disposed between the two baffles 212, which may be formed by a space between the two baffles 212, and may be used for the junction box of the current transformer 100 to penetrate, so as to fix the current transformer 100, and may facilitate the wiring of the junction box.

Further, in some embodiments, the first clamping portion 22 and the second clamping portion may be axially spaced at two ends of the baffle 212, and the first clamping portion 22 and the second clamping portion may cooperate to clamp one or a group of current transformers 100; the set of current transformers 100 may include a plurality of current transformers 100 arranged side by side.

In some embodiments, the first clamping portion 22 may include a first ring-shaped body having an outer diameter corresponding to an outer diameter of the current transformer 100, which may be in contact with an end surface of one end of the current transformer 100. The first ring body may include a plurality of first clamping plates 221 that are spliced with each other; the first clamping plate 221 may be arc-shaped, the plurality of first clamping plates 221 may be spliced to form the first ring-shaped body, and the two ends of the first clamping plate 221 may be respectively provided with a first connecting protrusion 2211; the first connecting protrusion 2211 may protrude in a radial direction of the first clamping plate 221, may have a sheet shape, and may be integrally formed with the first clamping plate 221. The first connecting protrusion 2211 may be used to connect with another first clamping plate 221, and a first through hole 2212 may be formed thereon; the first through hole 2212 can be aligned with the first through hole 2212 of the other first clamping plate 221 for the connecting component to penetrate through to connect the two first clamping plates 221 disposed adjacently.

The second clamping portion may include a second ring-shaped body, the second ring-shaped body is disposed opposite to the first ring-shaped body, and the second ring-shaped body and the first ring-shaped body are capable of clamping the current transformer 100 in cooperation. The second ring has an outer diameter corresponding to the outer diameter of the current transformer 100, and is capable of being attached to an end surface of one end of the current transformer 100. The second annular body can comprise a plurality of second clamping plates which are mutually spliced; the second clamping plates can be arc-shaped, the plurality of second clamping plates can be mutually spliced to form the second annular body, and the two ends of each second clamping plate can be respectively provided with a second connecting convex part; the second connecting protrusion may protrude in a radial direction of the second clamping plate, may be sheet-shaped, and may be integrally formed with the second clamping plate. The second coupling protrusion may be used to couple with another second clamping plate, and may have a second through-hole 2212; the second through hole can be aligned with the second through hole on the other second clamping plate, so that the connecting assembly can penetrate through the second through hole to connect the two second clamping plates which are adjacently arranged.

Further, in some embodiments, the clamp may further include a connecting assembly operable to connect the first clamping portion 22 and the second clamping portion such that the first clamping portion 22 and the second clamping portion may cooperate to clamp the current transformer 100. The connecting assembly may include a fastening assembly disposed along the axial direction and capable of being inserted into the first through hole 2212 and the second through hole, the fastening assembly may include a bolt and a nut, the bolt may be disposed along the axial direction, and it may be inserted into the first through hole 2212 and the second through hole, so as to connect two first clamping plates and two second clamping plates which are spliced with each other, and connect the first annular body and the second annular body, and the nut may be sleeved on one end of the bolt. It will be appreciated that in other embodiments, the connection assembly may not be limited to including a fastening assembly.

Adopt the utility model discloses a strutting arrangement for be used for current transformer has following advantage:

1) the CT and the GIS shell can be separated, so that the CT cannot follow vibration when the breaker is opened and closed, and influence factors of CT disconnection caused by vibration are eliminated.

2) The influence factors of CT disconnection are eliminated, personnel injury and equipment damage caused by high voltage of CT disconnection are avoided, the risk of protection misoperation caused by CT disconnection is also eliminated, and normal operation of a unit and a power transmission line is ensured.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. A supporting and fixing device for a current transformer is characterized by comprising a bracket (10) and a clamp (20) arranged on the bracket (10) for clamping and fixing the current transformer (100);

the clamp (20) comprises a base (21), a first clamping part (22) and a second clamping part; the base (21) is arranged on the bracket (10) to support the current transformer (100); an avoidance hole (213) for avoiding the junction box of the current transformer (100) is formed in the base (21); the first clamping part (22) and the second clamping part are arranged on the base (21) at intervals so as to clamp and fix the current transformer (100) from the axial direction.

2. The supporting and fixing device for a current transformer according to claim 1, characterized in that said base (21) comprises two seats (211) arranged at intervals in an inverted L shape, and two baffles (212) respectively arranged at the upper parts of said two seats (211);

the two baffles (212) are oppositely arranged, and a gap is reserved to form the avoidance hole (213);

the first clamping part (22) and the second clamping part are arranged at two ends of the baffle (212) at intervals along the axial direction.

3. The supporting and fixing device for a current transformer according to claim 2, wherein the baffle (212) is of a concave arc structure to be attached to the current transformer (100).

4. Support fixture for a current transformer according to claim 1, characterized in that said clamp (20) further comprises a connection assembly connecting the first clamp portion (22) and the second clamp portion.

5. Support fixture for a current transformer according to claim 4, characterized in that said first clamp (22) comprises a first ring-shaped body;

the second clamping portion comprises a second annular body arranged opposite to the first annular body;

the connecting assembly is disposed on the first ring body and the second ring body to connect the first ring body and the second ring body.

6. The supporting and fixing device for a current transformer according to claim 5, characterized in that said first annular body comprises a plurality of first clamping plates (221) spliced with each other;

the second annular body comprises a plurality of second clamping plates which are mutually spliced;

two ends of the first clamping plate (221) are respectively provided with a first connecting convex part (2211) connected with the other first clamping plate (221); a first through hole (2212) is formed in the first connecting convex part (2211);

two ends of the second clamping plate are respectively provided with a second connecting convex part connected with the other second clamping plate;

the second connecting convex part is provided with a second through hole;

the connecting assembly comprises a fastening assembly which is axially arranged and penetrates through the first through hole (2212) and the second through hole.

7. The supporting fixture for a current transformer according to claim 1, wherein; the support (10) comprises a support plate (11) and a plurality of support rods (12) arranged on the bottom surface of the support plate (11) at intervals;

the clamp (20) is arranged on the support plate (11).

8. The supporting and fixing device for a current transformer according to claim 7, characterized in that said supporting rod (12) is a telescopic rod comprising a first rod (121) and a second rod (122) telescopically arranged in said first rod (121); the second rod body (122) penetrates through the first rod body (121), and one end of the second rod body penetrating through the second rod body (122) is connected with the supporting plate (11).

9. The supporting and fixing device for a current transformer according to claim 7, wherein the supporting plate (11) is plural, and the plural supporting plates (11) are provided on the supporting rod (12) at intervals along a longitudinal direction of the supporting rod (12).

10. Support fixture for a current transformer according to claim 7, characterized in that said clamp (20) is removably connected with said support plate (11);

alternatively, the base (21) of the jig (20) is integrally formed with the support plate (11).

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