Main structure of a three-phase integrated current transformer

Abstract

The present application relates to a main structure of a three-phase integrated current transformer, and to the technical field of the three-phase integrated current transformer, which includes an insulator, an incoming bushing, an outgoing bushing and a conductive copper rod, wherein three conductive copper rods are provided, and the middle parts of the three conductive copper rods are all located in the insulator, three incoming bushings are provided side by side, and the three incoming bushings are provided on one side of the insulator, and each outgoing bushing covers one end of each conductive copper rod respectively, and three outgoing bushings are provided in a row, and the three outgoing bushings are provided on one side of the insulator, and each outgoing bushing covers one end of each conductive copper rod away from the incoming bushing respectively. The present application has the effect of reducing the installation space requirement of the three-phase integrated current transformer in the length direction.

Description

Technical Field

[0001] The present application relates to the technical field of three-phase integrated current transformers, and in particular to a main structure of a three-phase integrated current transformer. Background Art

[0002] With the rapid construction of smart grids, miniaturized and intelligent gas-insulated switchgear equipment is widely used. In order to meet the needs of smart grid construction, switchgear used in smart grids needs to be installed with three-phase current transformers. These transformers are generally installed around bushings or cables, which puts forward a large demand for installation space. Now the intelligence and miniaturization of switchgear have become the development trend of switchgear. Therefore, reducing the installation space of three-phase bushings and three-phase current transformers has become a starting point for gas-insulated switchgear to solve this problem.

[0003] Related technologies such as a Chinese patent with authorization announcement number CN204834330U discloses a three-phase integrated current transformer, including three conductive copper bars arranged vertically and in parallel at equal intervals, three phase current transformer coils are placed around corresponding conductive copper bars, an insulator is cast in the middle of the three conductive copper bars, the insulator accommodates the three phase current transformer coils, three-phase inlet and outlet bushings are cast on the outer sides of the conductive copper bars above and below the insulator, and live test terminals corresponding to the three conductive copper bars are arranged on one side of the insulator, and secondary terminals corresponding to the three three-phase current transformer coils are arranged.

[0004] The main body of the three-phase integrated current transformer mainly includes three conductive copper rods and an insulator, and three three-phase inlet and outlet bushings are provided at both ends of the insulator to wrap around the ends of the conductive copper rods.

[0005] With respect to the above-mentioned related technologies, the applicant has found that the two ends of the conductive copper rod extend from two opposite sides of the insulator. When wiring, the two ends of each conductive copper rod need to be connected to the corresponding two wires, that is, when the two wires need to be electrically connected using the same conductive copper plate, the distance between the ends of the two wires that are close to each other is greater than the length of the insulator. Therefore, there are certain installation space requirements along the length direction of the three-phase integrated current transformer, and the scope of use is limited. Summary of the invention

[0006] The purpose of the present application is to provide a main structure of a three-phase integrated current transformer, which has the effect of reducing the installation space requirement of the three-phase integrated current transformer in the length direction, thereby reducing the limitation on the use scope of the three-phase integrated current transformer.

[0007] The three-phase integrated current transformer provided in this application adopts the following technical solution:

[0008] A main structure of a three-phase integrated current transformer, comprising a first conductive copper rod, a second conductive copper rod, a third conductive copper rod and an insulator; the first conductive copper rod comprises a first vertical section, a first horizontal section and a first connecting section, the axis of the first vertical section is staggered with the axis of the first horizontal section and is perpendicular to each other, and the two ends of the first connecting section are respectively connected to the first vertical section and the first horizontal section; the second conductive copper rod comprises a second vertical section, a second horizontal section and a second connecting section, the axis of the second vertical section is staggered with the axis of the second horizontal section and is perpendicular to each other, and the two ends of the second connecting section are respectively connected to the second vertical section and the second horizontal section; the third conductive copper rod comprises a first horizontal section and a second connecting section, the axis of the second vertical section is staggered with the axis of the second horizontal section and is perpendicular to each other, and the two ends of the second connecting section are respectively connected to the second vertical section and the second horizontal section; The invention relates to a first embodiment of the present invention and a second embodiment of the present invention, wherein the first connecting section, the second connecting section and the third connecting section are respectively connected to the third vertical section and the third horizontal section, and the first connecting section, the second connecting section and the third connecting section are respectively connected to the third vertical section and the third horizontal section; the first connecting section, the second connecting section and the third connecting section are all located in the insulator as a whole, and the first vertical section, the second vertical section, the third vertical section, the first horizontal section, the second horizontal section and the third horizontal section all have one end located in the insulator; the axes of the first vertical section, the second vertical section and the third vertical section are parallel to each other and are on the same plane, and the axes of the first horizontal section, the second horizontal section and the third horizontal section are parallel to each other and are on the same plane.

[0009] By adopting the above technical solution, the first conductive copper rod conducts the two wires through the first vertical section and the first horizontal section, and because the axes of the first vertical section and the first horizontal section of the first conductive copper plate are perpendicular to each other, the two wires electrically connected through the first conductive copper plate can be conducted from two adjacent sides of the main structure, and the second conductive copper rod and the third conductive copper rod have the same principle, thereby reducing the installation space requirements of the three-phase integrated current transformer in the length direction.

[0010] Optionally, the first connecting section includes a flat section and a vertical section, one end of the flat section is connected to one end of the first vertical section located in the insulator, one end of the vertical section is connected to one end of the first flat section located in the insulator, and the vertical section is connected to one end of the flat section away from the first vertical section; the axis of the first vertical section is located outside the vertical plane where the first flat section is located.

[0011] By adopting the above technical solution, the overall length of the first conductive copper rod can be ensured by using the flat section and the vertical section, and the resistance of the first conductive copper rod can be ensured. At the same time, the vertical planes where the first vertical section and the first flat section are located are staggered, which facilitates the arrangement and connection of the two wires with the two ends of the first conductive copper rod respectively.

[0012] Optionally, the second connecting section includes an extended section and a bent section, one end of the extended section is connected to one end of the second vertical section located in the insulator, one end of the bent section is connected to one end of the second horizontal section located in the insulator, and one end of the extended section away from the second vertical section is connected to one end of the bent section away from the second horizontal section; the axis of the extended section coincides with the axis of the second vertical section, and the end of the horizontal section away from the first vertical section is close to the extended section.

[0013] By adopting the above technical solution, the overall length of the second conductive copper rod can be ensured by utilizing the extended section and the bent section, thereby ensuring the resistance of the second conductive copper rod. At the same time, by placing the flat section close to the extended section, the first conductive copper rod and the second conductive copper rod can be arranged compactly, thereby avoiding the main structure from being too large.

[0014] Optionally, the third connecting section includes an extension section, a transition section, a vertical section and an inclined section arranged in sequence, and one end of the extension section and the inclined section away from the transition section are respectively connected to one end of the third vertical section and the third horizontal section located in the insulator; the axis of the extension section coincides with the axis of the third vertical section, and the axes of the vertical section, the inclined section and the third horizontal section are on the same vertical plane.

[0015] By adopting the above technical solution, the extension section, transition section, vertical section and inclined section can be used to ensure the overall length of the third conductive copper rod and the resistance of the third conductive copper rod. At the same time, the inclined section and the curved section are arranged compactly without interference, thereby avoiding the main structure being too large.

[0016] Optionally, the insulator includes a main body, a sub-body and a supporting part, the supporting part is arranged in a thin plate shape, the main body is arranged above the supporting part, the sub-body is arranged below the supporting part, the flat section is located in the sub-body, the lower end of the vertical section, the lower end of the extended section and the extended section are all located in the sub-body, and the edge of the supporting part extends beyond the top projection range of the sub-body.

[0017] By adopting the above technical solution, when the main structure is installed in an air-insulated switch cabinet, the support part can be tightly attached to the surface of the installation part designated by the air-insulated switch cabinet, and the auxiliary body part passes through the installation part designated by the air-insulated switch cabinet, thereby ensuring the connection stability between the main structure and the installation part designated by the air-insulated switch cabinet.

[0018] Optionally, a first bulge and a second bulge are provided on one side surface of the main body, the lower ends of the first bulge and the second bulge are integrally connected to the support portion, half of the extended section is located in the first bulge, and the lower end of the extended section extends into the second bulge.

[0019] By adopting the above technical solution, the first bulge and the second bulge can respectively cover the lengthened section and the extended section that deviate from the center of the main body, while avoiding excessive consumables of the entire part.

[0020] Optionally, an inclined reduction portion is provided on the main body, one end of the inclined reduction portion is connected to the side of the main body away from the support portion, the other end of the inclined reduction portion is connected to the side of the main body away from the first horizontal section, and the extension direction of the inclined reduction portion is parallel to the axis of the inclined section.

[0021] By adopting the above technical solution, the consumables of the main body can be further reduced by utilizing the inclined reduction portion, the cost can be effectively reduced, and the overall volume of the main structure can be reduced.

[0022] Optionally, three incoming bushings and three outgoing bushings are further included, each of the incoming bushings and the outgoing bushings are integrally formed with the insulator, each of the incoming bushings respectively covers a portion of the first horizontal section, the second horizontal section and the third horizontal section extending out of the insulator, a vertical projection surface of each of the incoming bushings is located within the vertical projection range of the support portion, and each of the outgoing bushings respectively covers a portion of the first vertical section, the second vertical section and the third vertical section extending out of the insulator.

[0023] By adopting the above technical solution, each incoming line bushing and each outgoing line bushing can respectively protect the two ends of the first conductive copper rod, the second conductive copper rod and the third conductive copper rod.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. It can reduce the installation space requirement of the three-phase integrated current transformer in the length direction and is suitable for more installation environments;

[0026] 2. The resistance effect can be increased, making it safer to use, and the structure is compact without excessive increase in volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the main structure of the embodiment of the present application;

[0028] Figure 2 is a schematic structural diagram of an insulator according to an embodiment of the present application;

[0029] Figure 3 is a schematic structural diagram of a conductive copper rod according to an embodiment of the present application;

[0030] Figure 4 is a schematic diagram of the installation of the conductive copper rod of the embodiment of the present application;

[0031] Figure 5is a schematic structural diagram of a first conductive copper rod in an embodiment of the present application;

[0032] Figure 6 is a schematic diagram of the installation of the first conductive copper rod in an embodiment of the present application;

[0033] Figure 7 is a schematic structural diagram of a second conductive copper rod in an embodiment of the present application;

[0034] Figure 8 is a schematic diagram of the installation of the second conductive copper rod in an embodiment of the present application;

[0035] Fig. 9 is a schematic structural diagram of a third conductive copper rod in an embodiment of the present application;

[0036] Fig.10 It is a schematic diagram of the installation of the third conductive copper rod in the embodiment of the present application.

[0037] In the figure, 1, insulator; 11, auxiliary body; 111, third bulge; 12, support; 13, main body; 131, first bulge; 132, second bulge; 133, inclined reduction portion; 2, incoming bushing; 3, outgoing bushing; 4, conductive copper rod; 5, first conductive copper rod; 51, first vertical section; 52, first connecting section; 521, flat section; 522, vertical section; 53, first horizontal section; 6, second conductive copper rod; 61, second vertical section; 62, second connecting section; 621, extended section; 622, bent section; 63, second horizontal section; 7, third conductive copper rod; 71, third vertical section; 72, third connecting section; 721, extended section; 722, transition section; 723, vertical section; 724, inclined section; 73, third horizontal section. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1 -Attached Fig.10 , further details of this application are given.

[0039] A main structure of a three-phase integrated current transformer, referring to Figure 1 , including an insulator 1, an incoming bushing 2, an outgoing bushing 3 and a conductive copper rod 4, three conductive copper rods 4 are provided, and the middle parts of the three conductive copper rods 4 are all located in the insulator 1, three incoming bushings 2 are arranged side by side, and the three incoming bushings 2 are arranged on one side surface of the insulator 1, and each outgoing bushing 3 respectively covers one end of each conductive copper rod 4, three outgoing bushings 3 are arranged side by side, and the three outgoing bushings 3 are arranged on one side surface of the insulator 1, and each outgoing bushing 3 respectively covers one end of each conductive copper rod 4 away from the incoming bushing 2.

[0040] Reference Figure 2The insulator 1 includes a sub-body 11, a support 12 and a main body 13 which are arranged in sequence from bottom to top. When the main structure is installed on the mounting portion of the gas-insulated switchgear, the lower surface of the support 12 is in contact with the surface of the mounting portion of the gas-insulated switchgear, and the sub-body 11 passes through the mounting portion of the gas-insulated switchgear; wherein each outlet bushing 3 is arranged on the lower side of the sub-body 11, and each outlet bushing 3 is equidistantly arranged along the length direction of the sub-body 11, and the axis of each outlet bushing 3 is perpendicular to the length direction of the sub-body 11; each incoming bushing 2 is arranged on one side of the main body 13, and each incoming bushing 2 is equidistantly arranged along the axis direction of the arc sleeve, and the axis of each outlet bushing 3 is perpendicular to the axis of the incoming bushing 2.

[0041] Reference Figure 2 The combined projection of the main body 13 and each incoming bushing 2 along the thickness direction of the support part 12 is within the projection range of the thickness direction of the support part 12, and the outer edges of the support part 12 extend out of the edge of the auxiliary body 11 on the side close to the support part 12, so that when the auxiliary body 11 passes through the mounting part on the gas-insulated switchgear, the part of the support part 12 extending outside the auxiliary body 11 can fit with the surface of the mounting part on the gas-insulated switchgear, ensuring the connection stability between the insulator 1 and the mounting part on the gas-insulated switchgear.

[0042] Reference Figure 2 , wherein two outlet sleeves 3 are located within the projection range of the main body 13 along the thickness direction of the support portion 12 , and another outlet sleeve 3 is located outside the projection range of the main body 13 along the thickness direction of the support portion 12 .

[0043] Reference Figure 3 and Figure 4 Each conductive copper rod 4 is divided into a first conductive copper rod 5, a second conductive copper rod 6 and a third conductive copper rod 7 according to its position, wherein the first conductive copper rod 5, the second conductive copper rod 6 and the third conductive copper rod 7 are all formed by continuously bending a copper rod with a circular cross section for multiple times.

[0044] Reference Figure 4 and Figure 5 The first conductive copper rod 5 includes a first vertical section 51, a first connecting section 52 and a first horizontal section 53 which are arranged in sequence and formed integrally. The axes of the first vertical section 51 and the first horizontal section 53 are perpendicular to each other, and one end of each of the first vertical section 51 and the first horizontal section 53 is located inside the insulator 1. The parts of the first vertical section 51 and the first horizontal section 53 located outside the insulator 1 are protected by the corresponding outlet bushing 3 and the incoming bushing 2 respectively; wherein, the axis of the first vertical section 51 is located outside the vertical plane where the first horizontal section 53 is located.

[0045] Reference Figure 5 and Figure 6The first connecting section 52 includes a flat section 521 and a vertical section 522 which are arranged in sequence. The flat section 521 is located in the auxiliary body 11, and the axis of the flat section 521 is parallel to the side surface of the auxiliary body 11 close to the main body 13. The end of the vertical section 522 connected to the flat section 521 extends into the auxiliary body 11. The axis of the vertical section 522 intersects with the axis of the first horizontal section 53, that is, the axis of the vertical section 522 coincides with the vertical plane where the first horizontal section 53 is located; wherein, the end of the flat section 521 away from the first vertical section 51 is close to the extension section 621, and a third bulging portion 111 which is arranged in a triangular shape in top view is arranged on one side of the auxiliary body 11, and the end of the flat section 521 away from the first vertical section 51 extends into the third bulging portion 111.

[0046] Reference Figure 4 and Figure 7 The second conductive copper rod 6 includes a second vertical section 61, a second connecting section 62 and a second horizontal section 63 which are sequentially arranged and integrally formed, the axes of the second vertical section 61 and the second horizontal section 63 are perpendicular to each other, and one end of each of the second vertical section 61 and the second horizontal section 63 is located inside the insulator 1, and the portions of the second vertical section 61 and the second horizontal section 63 located outside the insulator 1 are protected by corresponding outlet bushings 3 and inlet bushings 2, respectively; wherein, the axis of the second vertical section 61 is located outside the vertical plane where the second horizontal section 63 is located, and the second horizontal section 63 is located directly above the first horizontal section 53.

[0047] Reference Figure 7 and Figure 8 The second connecting section 62 includes an extended section 621 and a bent section 622 arranged on one side, and the axis of the extended section 621 coincides with the axis of the second vertical section 61; wherein, a first protrusion 131 is arranged on one side of the main body 13, half of the extended section 621 is located in the first protrusion 131, the lower end of the first protrusion 131 is integrally formed with the upper surface of the support portion 12, the lower end of the bent section 622 at least partially extends into the upper end of the first protrusion 131, and the upper end of the bent section 622 is completely located in the main body 13.

[0048] Reference Figure 4 and Fig. 9 The third conductive copper rod 7 includes a third vertical section 71, a third connecting section 72 and a third horizontal section 73 which are sequentially arranged and integrally formed. The axes of the third vertical section 71 and the third horizontal section 73 are perpendicular to each other, and one end of each of the third vertical section 71 and the third horizontal section 73 is located inside the insulator 1. The parts of the third vertical section 71 and the third horizontal section 73 located outside the insulator 1 are protected by the corresponding outlet bushing 3 and the incoming bushing 2, respectively; wherein, the axis of the third vertical section 71 is located outside the vertical plane where the third horizontal section 73 is located, and the third horizontal section 73 is located directly above the second horizontal section 63.

[0049] Reference Fig. 9 and Fig.10 The third connecting section 72 includes an extension section 721, a transition section 722, a vertical section 723 and an inclined section 724 which are arranged in sequence. The upper end of the inclined section 724 is located directly above the upper end of the curved section 622. The axis of the extension section 721 coincides with the axis of the third vertical section 71. The axes of the vertical section 723, the inclined section 724 and the third horizontal section 73 are on the same vertical plane. A second protruding portion 132 is provided on one side of the main body 13. The upper end of the extension section 721 extends into the second protruding portion 132. The lower end of the inclined section 724 at least partially extends into the upper end of the second protruding portion 132.

[0050] Among them, an inclined reduction portion 133 is provided on the main body 13, one end of the inclined reduction portion 133 is connected to the side of the main body 13 away from the support portion 12, and the other end of the inclined reduction portion 133 is connected to the side of the main body 13 away from the first horizontal section 53, and the extension direction of the inclined reduction portion 133 is parallel to the axis of the inclined section 724.

[0051] The implementation principle of the embodiment of the present application is:

[0052] When the three-phase integrated current transformer adopting the main structure is installed on the designated installation part of the gas insulated switchgear, the two wires matched with the two ends of each conductive copper rod 4 can be respectively close to the two adjacent side surfaces of the main structure, thereby reducing the installation space requirements along the length direction of the three-phase integrated current transformer.

[0053] Moreover, after adopting this technical solution, the overall length of each conductive copper rod 4 can be increased. The longer the length of the conductive copper rod 4 is, the more stable the conductive effect is. At the same time, it can also ensure that each conductive copper rod 4 is installed compactly without excessively increasing the volume of the main structure.

[0054] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A main structure of a three-phase integrated current transformer, characterized in that: The invention comprises a first conductive copper rod (5), a second conductive copper rod (6), a third conductive copper rod (7) and an insulator (1); the first conductive copper rod (5) comprises a first vertical section (51), a first horizontal section (53) and a first connecting section (52); the axis of the first vertical section (51) and the axis of the first horizontal section (53) are staggered and perpendicular to each other; the two ends of the first connecting section (52) are respectively connected to the first vertical section (51) and the first horizontal section (53); the second conductive copper rod (6) comprises a second vertical section (61), a second horizontal section (63) and a second connecting section (62); the axis of the second vertical section (61) and the axis of the second horizontal section (63) are staggered and perpendicular to each other; the two ends of the second connecting section (62) are respectively connected to the second vertical section (61) and the second horizontal section (63); the third conductive copper rod (7) comprises a third vertical section (71), a third horizontal section (72) and a third connecting section (73); 3) and a third connecting section (72), the axis of the third vertical section (71) and the axis of the third horizontal section (73) are staggered and perpendicular to each other, and the two ends of the third connecting section (72) are respectively connected to the third vertical section (71) and the third horizontal section (73); the first connecting section (52), the second connecting section (62) and the third connecting section (72) are all located in the insulator (1); the first vertical section (51), the second vertical section (61), the third vertical section (71), the first horizontal section (53), the second horizontal section (63) and the third horizontal section (73) all have one end located in the insulator (1); the axes of the first vertical section (51), the second vertical section (61) and the third vertical section (71) are parallel to each other and are located on the same plane, and the axes of the first horizontal section (53), the second horizontal section (63) and the third horizontal section (73) are parallel to each other and are located on the same plane.

2. The main structure of a three-phase integrated current transformer according to claim 1, characterized in that: The first connecting section (52) comprises a flat section (521) and a vertical section (522); one end of the flat section (521) is connected to an end of the first vertical section (51) located inside the insulator (1); one end of the vertical section (522) is connected to an end of the first flat section (53) located inside the insulator (1); the vertical section (522) is connected to an end of the flat section (521) away from the first flat section (53) and away from the first vertical section (51); the axis of the first vertical section (51) is located outside the vertical plane where the first flat section (53) is located.

3. The main structure of a three-phase integrated current transformer according to claim 2, characterized in that: The second connecting section (62) comprises an extended section (621) and a bent section (622); one end of the extended section (621) is connected to an end of the second vertical section (61) located in the insulator (1); one end of the bent section (622) is connected to an end of the second horizontal section (63) located inside the insulator (1); an end of the extended section (621) away from the second vertical section (61) is connected to an end of the bent section (622) away from the second horizontal section (63); an axis of the extended section (621) coincides with an axis of the second vertical section (61); an end of the horizontal section (521) away from the first vertical section (51) is close to the extended section (621).

4. The main structure of a three-phase integrated current transformer according to claim 3, characterized in that: The third connecting section (72) comprises an extension section (721), a transition section (722), a vertical section (723) and an inclined section (724) which are arranged in sequence; one end of the extension section (721) and the inclined section (724) away from the transition section (722) are respectively connected to one end of the third vertical section (71) and the third horizontal section (73) located inside the insulator (1); the axis of the extension section (721) coincides with the axis of the third vertical section (71), and the axes of the vertical section (723), the inclined section (724) and the third horizontal section (73) are located on the same vertical plane.

5. The main structure of a three-phase integrated current transformer according to claim 4, characterized in that: The insulator (1) comprises a main body (13), a secondary body (11) and a support portion (12); the support portion (12) is arranged in a thin plate shape; the main body (13) is arranged above the support portion (12); the secondary body (11) is arranged below the support portion (12); the flat section (521) is located inside the secondary body (11); and the lower end of the vertical section (522), the lower end of the extended section (621) and the extended section (721) are all located inside the secondary body (11).

6. The main structure of a three-phase integrated current transformer according to claim 5, characterized in that: A first bulging portion (131) and a second bulging portion (132) are provided on one side surface of the main body portion (13); the lower ends of the first bulging portion (131) and the second bulging portion (132) are integrally connected to the support portion (12); half of the extended section (621) is located in the first bulging portion (131); and the lower end of the extended section (721) extends into the second bulging portion (132).

7. The main structure of a three-phase integrated current transformer according to claim 5, characterized in that: The main body (13) is provided with an inclined reduction portion (133), one end of the inclined reduction portion (133) is connected to a side of the main body (13) away from the support portion (12), the other end of the inclined reduction portion (133) is connected to a side of the main body (13) away from the first horizontal section (53), and the extension direction of the inclined reduction portion (133) is parallel to the axis of the inclined section (724).

8. The main structure of a three-phase integrated current transformer according to claim 5, characterized in that: The invention also comprises three incoming bushings (2) and three outgoing bushings (3), each of the incoming bushings (2) and the outgoing bushings (3) being integrally formed with the insulator (1), each of the incoming bushings (2) respectively covering a portion of the first horizontal section (53), the second horizontal section (63) and the third horizontal section (73) extending outside the insulator (1), a vertical projection surface of each incoming bushing (2) being located within a vertical projection range of the support portion (12), and each of the outgoing bushings (3) respectively covering a portion of the first vertical section (51), the second vertical section (61) and the third vertical section (71) extending outside the insulator (1).

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