Combined electric appliance with reversing function for 110kV GIS (Gas Insulated Switchgear)

Abstract

The utility model discloses a combined electric appliance with a reversing function for a 110kV GIS (Gas Insulated Switchgear), comprising a two-way bus which comprises a bus shell and a bus conductor arranged at the inner side of the bus shell; the current transformer comprises a transformer shell and a contact seat arranged on the inner side of the transformer shell; the commutation insulator comprises a flange plate, an epoxy resin pouring piece located on the inner side of the flange plate and three inserts arranged around the circumference of the central axis of the epoxy resin pouring piece, and the inserts form a first connecting end and a second connecting end on the two opposite sides of the epoxy resin pouring piece in the axial direction respectively and are used for being connected with the bus conductor and the contact seat respectively. The first connecting end and the second connecting end are staggered along the circumferential angle of the epoxy resin pouring piece; and connecting structures are arranged among the bus shell, the mutual inductor shell and the flange plate to connect the bus shell, the mutual inductor shell and the flange plate. The utility model has the advantages of simple structure and low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a combined electrical appliance with a commutation function for a 110kV GIS. Background Art

[0002] In high-voltage power transmission and transformation systems, combined electrical appliances have been widely used in power grid systems. Current transformers and two-way busbars are the most important components in combined electrical appliances, and are mainly used for system measurement, protection, and electrical connection between components. In engineering applications, due to the structural differences in different components, combined electrical appliances with three phases in one box generally have phase sequence conversion conditions. The traditional method is to connect the contact seat of the current transformer with the busbar conductor of the two-way busbar through a special-shaped commutation conductor. This method is costly, has complex parts, poor versatility, and a high error rate. Therefore, it is necessary to design a combined electrical appliance structure with a commutation function. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a combined electrical appliance with a reversing function for 110kV GIS, which has a simple structure and low cost.

[0004] The combined electrical appliance with a reversing function for 110kV GIS according to the embodiment of the utility model comprises:

[0005] A two-way busbar comprises a busbar housing and a busbar conductor arranged inside the busbar housing;

[0006] A current transformer, comprising a transformer housing and a contact seat arranged inside the transformer housing;

[0007] A commutating insulator, comprising a flange, an epoxy resin casting located inside the flange, and three inserts arranged circumferentially around the central axis of the epoxy resin casting, wherein the inserts respectively form a first connection end and a second connection end on opposite sides of the axial direction of the epoxy resin casting, respectively used to connect the busbar conductor and the contact seat, and the first connection end and the second connection end are staggered along the circumferential angle of the epoxy resin casting;

[0008] Wherein, a connection structure is provided between the busbar housing, the transformer housing and the flange to connect the three.

[0009] The combined electrical appliance with a reversing function for 110kV GIS according to the embodiment of the utility model has at least the following beneficial effects:

[0010] By arranging a commutating insulator between the two-way busbars and the current transformer, the first connecting end and the second connecting end of the insert of the commutating insulator are offset along the circumferential angle of the epoxy resin casting, thereby offsetting and connecting the busbar conductors of the two-way busbars and the contact seat of the current transformer, and a connecting structure is arranged between the busbar housing, the transformer housing and the flange to connect the three, so that the two-way busbars and the current transformer are combined together to form a combined electrical appliance. Compared with the solution of using special-shaped commutating conductors in the prior art, this embodiment has a simple structure and low cost, is simple and reliable to install, and has a high degree of parts commonality and standardization.

[0011] According to some embodiments of the present invention, the projections of the first connecting end and the second connecting end on the cross section of the epoxy resin casting are distributed on the same circle and the central angle is 30°.

[0012] According to some embodiments of the utility model, a plurality of first bolt holes are arranged circumferentially on the flange, a plurality of second bolt holes are correspondingly provided on the busbar housing, a plurality of third bolt holes are correspondingly provided on the transformer housing, and the connecting structure includes connecting bolts, and the connecting bolts are passed through the second bolt holes, the first bolt holes and the third bolt holes.

[0013] According to some embodiments of the utility model, a positioning structure is provided between the busbar housing, the transformer housing and the flange, which is used to relatively position the busbar housing, the transformer housing and the flange along the circumference of the flange so that the second bolt hole, the first bolt hole and the third bolt hole are axially aligned.

[0014] According to some embodiments of the utility model, the positioning structure includes a plurality of positioning rods arranged on the flange, the positioning rods are distributed along the axial direction of the flange, and the plurality of positioning rods are arranged circumferentially around the central axis of the flange, a first positioning hole is provided on the busbar housing, and a second positioning hole is provided on the transformer housing, and both ends of the positioning rods are respectively inserted into the first positioning hole and the second positioning hole.

[0015] According to some embodiments of the present invention, the positioning rod and the first bolt hole are arranged on the same circumference and are staggered.

[0016] According to some embodiments of the present invention, the positioning rod is detachably connected to the flange.

[0017] According to some embodiments of the utility model, the positioning rod is provided with an external thread, and the flange is provided with a plurality of axially penetrating threaded mounting holes corresponding to the positioning rod, so as to threadably mount the positioning rod.

[0018] According to some embodiments of the present utility model, a shielding ring is buried inside the epoxy resin casting, and the shielding ring is connected to the flange.

[0019] According to some embodiments of the present invention, the shielding ring is configured as a spiral spring.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of the installation structure of a combined electrical appliance with a reversing function for a 110kV GIS according to an embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of a commutation insulator of an embodiment of the utility model;

[0024] Figure 3 It is a structural schematic diagram of an insert according to an embodiment of the utility model.

[0025] Figure Number:

[0026] Two-way busbar 100, busbar housing 101, busbar conductor 102, first positioning hole 103;

[0027] Current transformer 200, transformer housing 201, contact seat 202, second positioning hole 203;

[0028] Commutating insulator 300, flange 310, first bolt hole 311, threaded mounting hole 312, epoxy resin casting 320, insert 330, first connection end 331, second connection end 332;

[0029] Positioning rod 400;

[0030] Shielding ring 500. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] It should be noted that when the current transformer 200 and the two-way busbar 100 are combined, due to the structural reasons of the product module, the busbar conductor 102 of the two-way busbar 100 and the contact holder 202 of the current transformer 200 need to be misaligned in order to be connected during installation. The current solution is to solve this layout problem through special-shaped commutation conductors, but this solution is costly, cumbersome and difficult to install, and is prone to installation errors and other problems.

[0036] To solve the above problems, refer to Figures 1 to 3 As shown, the utility model provides a combined electrical appliance with a commutation function for 110kV GIS, comprising: a two-way busbar 100, a current transformer 200, and a commutation insulator 300.

[0037] The two-way busbar 100 includes a busbar housing 101 and a busbar conductor 102 disposed inside the busbar housing 101 .

[0038] The current transformer 200 includes a transformer housing 201 and a contact base 202 disposed inside the transformer housing 201 .

[0039] The commutation insulator 300 includes a flange 310, an epoxy resin casting 320 and three inserts 330. The epoxy resin casting 320 is located inside the flange 310. The three inserts 330 are located in the middle of the epoxy resin casting 320 and are arranged circumferentially around the central axis of the epoxy resin casting 320. The inserts 330 are distributed along the axial direction of the epoxy resin casting 320. Specifically, the inserts 330 are formed with a first connection end 331 and a second connection end 332 on opposite sides of the axial direction of the epoxy resin casting 320. The first connection end 331 and the second connection end 332 are provided with threaded holes for connecting the busbar conductor 102 and the busbar conductor 102 respectively. and a contact seat 202, wherein the first connection end 331 and the second connection end 332 on the same insert 330 are offset along the circumferential angle of the epoxy resin casting 320, so as to realize the offset docking of the busbar conductor 102 of the two-way busbar 100 and the contact seat 202 of the current transformer 200. In this embodiment, the three first connection ends 331 of the three inserts 330 are evenly arranged on the same circle, the three second connection ends 332 of the three inserts 330 are evenly arranged on the same circle, and the projections of the three first connection ends 331 and the three second connection ends 332 of the three inserts 330 on the cross section of the epoxy resin casting 320 are arranged on the same circle.

[0040] In addition, a connection structure is provided between the busbar housing 101, the current transformer housing 201 and the flange 310 to connect the three, so as to combine the two-way busbar 100 and the current transformer 200 to form a combined electrical appliance.

[0041] The utility model embodiment of the combined electrical appliance with a commutation function for 110kVGIS is provided with a commutation insulator 300 between two busbars 100 and a current transformer 200, so that the first connection end 331 and the second connection end 332 of the insert 330 of the commutation insulator 300 are offset along the circumferential angle of the epoxy resin casting 320, thereby offsetting and connecting the busbar conductor 102 of the two busbars 100 and the contact seat 202 of the current transformer 200, and further providing a connection structure between the busbar housing 101, the transformer housing 201 and the flange 310 to connect the three, thereby combining the two busbars 100 and the current transformer 200 to form a combined electrical appliance. Compared with the solution of using a special-shaped commutation conductor in the prior art, the present embodiment has a simple structure and low cost, is easy and reliable to install, and has a high degree of parts commonality and standardization.

[0042] In some specific embodiments, Figure 2 and Figure 3As shown, the projections of the first connection end 331 and the second connection end 332 of the same insert 330 on the cross section of the epoxy resin casting 320 are distributed on the same circle and the central angle is 30°, that is, the angle between the line connecting the projection center of the first connection end 331 on the cross section of the epoxy resin casting 320 and the central axis of the epoxy resin casting 320 and the angle between the line connecting the projection center of the second connection end 332 on the cross section of the epoxy resin casting 320 and the central axis of the epoxy resin casting 320 is 30°, so as to realize the commutation operation inside the commutation insulator 300. It can be imagined that for different combined electrical appliances, this angle can be adaptively adjusted.

[0043] Reference Figure 1 and Figure 2 As shown, it can be understood that a plurality of first bolt holes 311 are arranged circumferentially on the flange 310, the first bolt holes 311 penetrate the flange 310 along the axial direction of the flange 310, a plurality of second bolt holes (not shown) are arranged on the busbar housing 101 corresponding to the first bolt holes 311, a plurality of third bolt holes (not shown) are arranged on the transformer housing 201 corresponding to the first bolt holes 311, and the connection structure includes connecting bolts (not shown), and the connecting bolts are passed through the second bolt holes, the first bolt holes 311 and the third bolt holes, so as to connect the busbar housing 101, the flange 310 and the transformer housing 201 together, and the structure is simple and the connection is convenient. Obviously, in order to make the connection stable and the force uniform, the plurality of first bolt holes 311 are evenly arranged on the same circumference.

[0044] Reference Figure 1 and Figure 2 As shown, it can be understood that a positioning structure is provided between the busbar housing 101, the transformer housing 201 and the flange 310, and the positioning structure is used to relatively position the busbar housing 101, the transformer housing 201 and the flange 310 along the circumference of the flange 310, so that the second bolt hole, the first bolt hole 311 and the third bolt hole are axially aligned. In this way, when the busbar housing 101, the transformer housing 201 and the flange 310 are combined and positioned, the busbar housing 101, the transformer housing 201 and the flange 310 can be relatively positioned along the circumference through the positioning structure, so that the second bolt hole, the first bolt hole 311 and the third bolt hole are quickly aligned, so as to facilitate the operator to insert the connecting bolts, save operation time and improve assembly efficiency.

[0045] Reference Figure 1 and Figure 2As shown, in some specific embodiments, the positioning structure includes a plurality of positioning rods 400 arranged on the flange 310, the positioning rods 400 are distributed along the axial direction of the flange 310, and the two ends of the positioning rods 400 extend out of the two end surfaces of the flange 310 respectively, and the plurality of positioning rods 400 are arranged circumferentially around the central axis of the flange 310, a plurality of first positioning holes 103 are provided on the busbar housing 101 corresponding to the positioning rods 400, and a plurality of second positioning holes 203 are provided on the transformer housing 201 corresponding to the positioning rods 400, and the two ends of the positioning rods 400 are respectively inserted into the first positioning holes 103 and the second positioning holes 203 to relatively position the busbar housing 101, the transformer housing 201 and the flange 310 along the circumferential direction of the flange 310, with a simple structure and quick positioning.

[0046] Reference Figure 1 and Figure 2 As shown, it can be understood that the positioning rods 400 and the first bolt holes 311 are arranged on the same circumference and staggered, that is, viewed from the circumference of the flange 310, any positioning rod 400 is located between the two first bolt holes 311, and any first bolt hole 311 is located between the two positioning rods 400. In this way, the positioning among the busbar housing 101, the transformer housing 201 and the flange 310 can be accurate and the connection can be stable, and the force is very balanced.

[0047] Reference Figure 1 and Figure 2 As shown, it can be understood that the positioning rod 400 is detachably connected to the flange 310, so that the positioning rod 400 can be replaced. It is easy to imagine that the combination electrical appliance will inevitably be subject to collision or vibration during use, and the positioning rod 400 may be damaged. In order to avoid the need to replace the positioning rod 400 with the commutating insulator 300 as a whole when the positioning rod 400 is damaged, the positioning rod 400 is detachably connected to the flange 310 of the commutating insulator 300 to reduce costs and facilitate separate processing.

[0048] Reference Figure 1 and Figure 2 As shown, it can be understood that the positioning rod 400 is provided with an external thread, and the flange 310 is provided with a plurality of axially penetrating threaded mounting holes 312 corresponding to the positioning rod 400. The threaded mounting holes 312 are used to threadably mount the positioning rod 400, which has a simple structure and is easy to process, and is also convenient for disassembly and assembly of the positioning rod 400. Obviously, the first positioning hole 103 and the second positioning hole 203 can be smooth holes, or internal threads can be provided. In some specific embodiments, the threaded mounting holes 312 are arranged on the same circumference as the first bolt holes 311 and are staggered.

[0049] Reference Figure 2As shown, it can be understood that a shielding ring 500 is buried inside the epoxy resin casting 320, and the shielding ring 500 is connected to the flange 310. In some specific embodiments, the shielding ring 500 is configured as a coil spring, and the coil spring is a tension spring. The tension spring can be fixed to the inner side of the flange 310 by means of screws and other structures, and is connected to the low-potential flange 310 through the tension spring to establish an annular shielding device, which shields the electromagnetic generated by the high potential, eliminates the electromagnetic interference of the high potential, and solves the influence of local discharge.

[0050] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A combined electrical appliance with a commutation function for 110kV GIS, characterized in that: include: A two-way busbar (100) comprises a busbar housing (101) and a busbar conductor (102) arranged inside the busbar housing (101); A current transformer (200) comprises a transformer housing (201) and a contact seat (202) arranged inside the transformer housing (201); A commutating insulator (300) comprises a flange (310), an epoxy resin casting (320) located inside the flange (310), and three inserts (330) arranged circumferentially around the central axis of the epoxy resin casting (320), wherein the inserts (330) are respectively formed with a first connection end (331) and a second connection end (332) on opposite sides of the axial direction of the epoxy resin casting (320), and are respectively used to connect the busbar conductor (102) and the contact seat (202), and the first connection end (331) and the second connection end (332) are angularly offset along the circumference of the epoxy resin casting (320); Wherein, a connection structure is provided between the busbar housing (101), the transformer housing (201) and the flange (310) to connect the three.

2. The combined electrical appliance with a reversing function for 110kV GIS according to claim 1, characterized in that: The projections of the first connecting end (331) and the second connecting end (332) on the cross section of the epoxy resin casting (320) are distributed on the same circle and the central angle is 30°.

3. The combined electrical appliance with a reversing function for 110kV GIS according to claim 1, characterized in that: The flange (310) is provided with a plurality of first bolt holes (311) arranged in a circumferential manner, the busbar housing (101) is provided with a plurality of second bolt holes correspondingly, and the transformer housing (201) is provided with a plurality of third bolt holes correspondingly, and the connection structure comprises connecting bolts, and the connecting bolts are passed through the second bolt holes, the first bolt holes (311) and the third bolt holes.

4. The combined electrical appliance with a reversing function for 110kV GIS according to claim 3 is characterized in that: A positioning structure is provided between the busbar housing (101), the transformer housing (201) and the flange (310), for relatively positioning the busbar housing (101), the transformer housing (201) and the flange (310) along the circumference of the flange (310), so that the second bolt hole, the first bolt hole (311) and the third bolt hole are axially aligned.

5. The combined electrical appliance with a reversing function for 110kV GIS according to claim 4, characterized in that: The positioning structure comprises a plurality of positioning rods (400) arranged on the flange (310), the positioning rods (400) being distributed along the axial direction of the flange (310), and the plurality of positioning rods (400) being arranged in a circle around the central axis of the flange (310), the busbar housing (101) being provided with a first positioning hole (103), the transformer housing (201) being provided with a second positioning hole (203), and two ends of the positioning rod (400) being respectively inserted into the first positioning hole (103) and the second positioning hole (203).

6. The combined electrical appliance with a reversing function for 110kV GIS according to claim 5, characterized in that: The positioning rods (400) and the first bolt holes (311) are arranged on the same circumference and are staggered.

7. The combined electrical appliance with a reversing function for 110kV GIS according to claim 5, characterized in that: The positioning rod (400) is detachably connected to the flange (310).

8. The combined electrical appliance with a reversing function for 110kV GIS according to claim 7, characterized in that: The positioning rod (400) is provided with an external thread, and the flange (310) is provided with a plurality of axially penetrating threaded mounting holes (312) corresponding to the positioning rod (400) so as to threadably mount the positioning rod (400).

9. The combined electrical appliance with a reversing function for 110kV GIS according to claim 1, characterized in that: A shielding ring (500) is embedded inside the epoxy resin casting (320), and the shielding ring (500) is connected to the flange (310).

10. The combined electrical appliance with a reversing function for 110kV GIS according to claim 9, characterized in that: The shielding ring (500) is configured as a coil spring.

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