A shell structure of a vertical current transformer convenient to assemble and an assembling method thereof

Abstract

The application provides a shell structure and an assembling method of a vertical current transformer, a plurality of CT shells and a plane profiling plate for positioning the plurality of CT shells, the CT shell is in a cylindrical shape, a conductor channel is horizontally and fixedly arranged at the top of the CT shell, a fixed flange is arranged at one end of the conductor channel, a plurality of connecting holes and positioning holes are arranged on the fixed flange, a plurality of profiling grooves are arranged on the plane profiling plate, the profiling grooves are the same in shape as the outer side wall of the conductor channel, and the plane profiling plate is arranged on the side of the fixed flange close to the CT shell; a plurality of correction holes are further arranged on the plane profiling plate, when the plurality of correction holes coincide with the plurality of positioning holes, the bottom ends of the plurality of CT shells are in the same plane, and then the plurality of CT shells are simultaneously installed in the circuit breaker shell below the CT shell. The application solves the problem of low assembly efficiency caused by repeated disassembly and debugging in the assembly process of the vertical CT current transformer.

Description

Technical Field

[0001] This invention belongs to the field of gas-insulated switch technology, specifically relating to a housing structure and assembly method for a vertical current transformer that is easy to assemble. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] For the assembly process of vertical current transformers (CTs) in 252kV gas-insulated metal-enclosed switchgear (GIS), existing technologies mainly adopt a phase-by-phase assembly approach, where each phase CT is individually and sequentially connected to the insulation plate and circuit breaker. While phase-by-phase assembly effectively avoids jamming and eliminates the risk of debris generation due to friction, ensuring the cleanliness of the insulation plate, it requires splitting what should have been a one-time process into three steps, significantly increasing assembly time and reducing efficiency. After each phase is assembled, the transmission components need to be repeatedly connected and adjusted to ensure that the circuit breaker's opening and closing speed and synchronization meet requirements. This repeated disassembly and adjustment not only increases the complexity of the operation but also places higher demands on the technical proficiency of the assembly personnel. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a housing structure and assembly method for a vertical current transformer that facilitates assembly, thus solving the problem of low assembly efficiency caused by repeated disassembly and adjustment during the assembly process of the vertical current transformer.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides a housing structure for a vertical current transformer (CT) that is easy to assemble, comprising: multiple CT housings and a planar contour plate for positioning the multiple CT housings. The CT housings are cylindrical, and a conductor channel is provided in a cavity fixedly arranged horizontally at the top of the CT housing. A fixing flange is provided at one end of the conductor channel, and multiple connection holes and positioning holes are provided on the fixing flange. Multiple contour grooves are provided on the planar contour plate, and the contour grooves have the same shape as the outer side wall of the conductor channel. The planar contour plate is located on the side of the fixing flange close to the CT housing. The planar contour plate is also provided with multiple correction holes. When the multiple correction holes coincide with the multiple positioning holes, the multiple CT housings can be arranged in parallel axially, thereby allowing the multiple CT housings to be installed simultaneously in a circuit breaker housing below the CT housings.

[0006] As a further implementation, locking components are provided in the plurality of correction holes and the plurality of positioning holes.

[0007] As a further implementation, there are two conductor channels arranged opposite to each other and coaxially on the housing, forming a cylindrical structure. The conductor channels are connected to the housing by a sealed weld, and the conductor channels communicate with the housing cavity.

[0008] As a further implementation, the bottom end of the CT housing is provided with a plurality of fastening screws, which are evenly distributed along the bottom end of the CT housing; the fastening screws are double-ended studs, one end of which is installed on the CT housing and the other end is connected to the circuit breaker housing.

[0009] As a further implementation, the circuit breaker housing is provided with multiple mounting seats, which are connected to the bottom end of the CT housing; a basin-type insulator is provided between the mounting seat and the bottom end of the CT housing.

[0010] As a further implementation, each of the CT housings is provided with at least one guide rod at its bottom end. When the number of guide rods is greater than or equal to 2, the guide rods are evenly distributed around the bottom end of the CT housing.

[0011] As a further implementation, the length of the guide rod is greater than the total thickness of the basin-type insulator flange and the circuit breaker housing flange.

[0012] As a further implementation, the positioning plate is an insulating plate, which is made of insulating material or a steel plate with insulating material on its surface. When the core of the positioning plate is a steel plate, the contour groove and the correction hole are provided with rigid insulating material.

[0013] Secondly, the present invention also provides an assembly method for a housing structure of a vertical current transformer that is easy to assemble, comprising the following steps: Step 1: Lift multiple CT housings to the set height, then use a spirit level to measure the bottom of the CT housings and level them so that they are in the same plane.

[0014] Step 2: After leveling, install flat contour plates on multiple CT housings and fix the multiple CT housings with locking components to ensure that the multiple CT housings are axially parallel and their bottom ends are in the same plane.

[0015] Step 3: Install the guide rod and fastening screw at the bottom of the CT housing. After installation, slowly lower the CT housing and connect it with the circuit breaker housing. During the lowering process, when the gap between the CT housing and the basin insulator is 10 cm, check and confirm the conductor alignment. When the gap between the CT housing and the basin insulator is 3 cm and 1 cm, check and clean to ensure the cleanliness of the insulation disc.

[0016] As a further implementation, a small amount of silicone grease is applied to all guide rods and fastening screws to facilitate alignment and reduce the generation of metal shavings.

[0017] Compared with the prior art, the advantages and positive effects of this invention are: This invention uses a planar contour plate to fix multiple CT housings into a single structure, ensuring that there is no relative movement between the individual CT housings. This reduces repetitive and differently positioned assembly operations to a single assembly. In this embodiment, there are three CT housings, representing different phases of the CT. The planar contour plate has multiple contour grooves, the shape of which is the same as the outer wall of the conductor channel. The planar contour plate is positioned on the side of the fixing flange closest to the CT housing to avoid interference between the fixing flange and other components during installation. The fixing flange has multiple connection holes and positioning holes, and multiple correction holes on the planar contour plate extend along the width of the planar contour plate. The multiple correction holes are arranged in a long strip shape along the axial direction of the CT housing. The lateral spacing of the multiple correction holes is the same as the lateral spacing of the multiple positioning holes, so that the axial direction of each CT housing can be perpendicular to the length direction of the planar contour plate. When the multiple correction holes coincide with the multiple positioning holes, the multiple CT housings can be arranged in parallel axial direction. This allows the multiple CT housings to be in the same posture and only require one alignment operation. As a result, the multiple CT housings can be installed simultaneously on the circuit breaker housing below the CT housing. This reduces the repetitive and differently positioned assembly operations to a one-time assembly, improving assembly efficiency while ensuring assembly quality. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1 This is a schematic diagram of the structure of multiple CT housings and planar contour plates of the present invention; Figure 2 This is a schematic diagram of the assembly structure of multiple CT housings and circuit breaker housings of the present invention.

[0020] In the diagram: 1. CT housing; 2. Fixed flange; 3. Flat contour plate; 4. Correction hole; 5. Positioning hole; 6. Connection hole; 7. Fastening screw; 8. Guide rod; 9. Basin insulator; 10. Mounting base; 11. Circuit breaker housing. Detailed Implementation

[0021] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. Example 1 This embodiment provides a housing structure for a vertical current transformer that is easy to assemble, such as... Figures 1-2 As shown, the system includes: multiple CT housings 1 and a planar contour plate 3 for positioning the multiple CT housings 1. The planar contour plate 3 fixes the multiple CT housings 1 into a single structure, ensuring that there is no relative movement between the individual CT housings 1. This reduces repetitive and differently positioned assembly operations to a single assembly. In this embodiment, there are three CT housings 1, which are housings for different phases of the CT. Each CT housing 1 is cylindrical, and a conductor channel is horizontally fixed at the top of each CT housing 1. A fixing flange 2 is provided at one end of the conductor channel. The fixing flange 2 is provided with multiple connecting holes 6 and positioning holes 5. The planar contour plate 3 is provided with multiple contour grooves, and the shape of the contour grooves corresponds to the outer wall shape of the conductor channel. Similarly, the planar contour plate 3 is located on the side of the fixed flange 2 near the CT housing 1 to avoid interference between the fixed flange 2 and other components during installation. The planar contour plate 3 is also provided with multiple correction holes 4. When the multiple correction holes 4 coincide with the multiple positioning holes 5, the multiple CT housings 1 can be arranged axially parallel, and the bottom ends of the multiple CT housings 1 are in the same plane. This allows the multiple CT housings 1 to be installed in the same posture with only one alignment operation, thereby simultaneously installing the multiple CT housings 1 on the circuit breaker housing 11 below the CT housing 1. This reduces repetitive and differently positioned assembly operations to a one-time assembly, improving assembly efficiency while ensuring assembly quality.

[0023] As a further implementation, locking components are provided in the plurality of correction holes 4 and the plurality of positioning holes 5. The CT housing 1 is firmly installed on the planar contour plate 3 by the locking components, so that the three CT housings 1 become a single structure, which facilitates one-time centering operation, thereby reducing the number of repeated operations and improving assembly efficiency.

[0024] As a further implementation, there are two conductor channels, which are arranged opposite to each other and coaxially on the CT housing 1, forming a cylindrical structure. The conductor channels are connected to the CT housing 1 by sealing welding, and the conductor channels are in communication with the cavity of the CT housing 1.

[0025] As a further implementation, the bottom end of the CT housing 1 is provided with multiple fastening screws 7. The multiple fastening screws 7 are evenly distributed along the bottom end of the CT housing 1, so that the connection between the bottom end of the CT housing 1 and the circuit breaker housing 11 is subjected to uniform force, ensuring the airtightness of the connection. The fastening screw 7 is a double-ended stud, with one end installed on the CT housing 1 and the other end connected to the circuit breaker housing 11. During equipment operation, it is necessary to clean, replace the seals or perform maintenance regularly, which can effectively avoid wear on the internal threads of the main body caused by frequent disassembly.

[0026] As a further implementation, a plurality of mounting seats 10 are fixedly provided on the circuit breaker housing 11, and the mounting seats 10 are connected to the bottom end of the CT housing 1; a basin-type insulator 9 is provided between the mounting seat 10 and the bottom end of the CT housing 1. The basin-type insulator 9 can fix and support the conductor inside the CT housing and the circuit breaker housing, seal and separate the CT chamber and the circuit breaker chamber, and play an electrical insulation role to prevent flashover, breakdown and other damage between the high voltage conductor and the outer shell.

[0027] As a further implementation, each CT housing 1 is provided with at least one guide rod 8 at its bottom end. When the number of guide rods 8 is greater than or equal to 2, the guide rods 8 are evenly distributed around the bottom end of the CT housing 1 to ensure the centering accuracy of the CT housing 1. The length of the guide rod 8 is greater than the total thickness of the edge of the basin insulator 9 and the circuit breaker housing 11, so that the guide rod 8 can pass through the basin insulator 9 before the fastening screw 7 to achieve the guiding function and facilitate the fastening screw 7 to smoothly enter the through hole on the circuit breaker housing 11.

[0028] As a further implementation, the positioning plate is an insulating plate, which is made of insulating material or a steel plate with insulating material on its surface. When the core of the positioning plate is a steel plate, rigid insulating material is provided at the contour groove and the correction hole 4.

[0029] Example 2 This embodiment provides an assembly method for the housing structure of a vertical current transformer that is easy to assemble, including the following steps: Step 1: Lift multiple CT housings 1 to the set height, and then use a spirit level to measure the bottom of the CT housings 1 to level them so that they are in the same plane.

[0030] Step 2: After leveling, install flat contour plates 3 on multiple CT housings 1, and fix multiple CT housings 1 with locking components to ensure that multiple CT housings 1 are axially parallel and their bottom ends are in the same plane.

[0031] Step 3: Install the guide rod 8 and fastening screw 7 at the bottom of CT housing 1. After installation, slowly lower CT housing 1 and connect it with circuit breaker housing 11. During the lowering process, when the gap between CT housing 1 and basin insulator 9 is 10CM, check and confirm the conductor alignment. When the gap between CT housing 1 and basin insulator 9 is 3CM and 1CM, check and clean to ensure the cleanliness of the insulation disc.

[0032] As a further implementation, a small amount of silicone grease is applied to all guide rods 8 and fastening screws 7 to facilitate alignment and reduce the generation of metal shavings.

[0033] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A housing structure for a vertical current transformer that is easy to assemble, characterized in that, include: The system comprises multiple CT housings and a planar contour plate for positioning the CT housings. Each CT housing is cylindrical, with a conductor channel horizontally fixed at its top. A fixing flange is located at one end of the conductor channel, and the fixing flange has multiple connection holes and positioning holes. The planar contour plate has multiple contour grooves, the shape of which is identical to the outer wall of the conductor channel. The planar contour plate is positioned on the side of the fixing flange closest to the CT housing. The planar contour plate also has multiple correction holes. When these correction holes coincide with the positioning holes, the multiple CT housings can maintain axial parallel arrangement, and their bottom ends are in the same plane. This allows the multiple CT housings to be simultaneously installed on a circuit breaker housing located below the CT housings.

2. The housing structure of a vertical current transformer as described in claim 1, characterized in that, Locking components are provided in the plurality of calibration holes and the plurality of positioning holes.

3. The housing structure of a vertical current transformer as described in claim 1, characterized in that, There are two conductor channels, which are arranged opposite to each other and coaxially on the CT housing, forming a cylindrical structure. The conductor channels are connected to the CT housing by a sealed weld, and the conductor channels are in communication with the cavity of the CT housing.

4. The housing structure of a vertical current transformer as described in claim 1, characterized in that, The bottom end of the CT housing is provided with multiple fastening screws, which are evenly distributed along the bottom end of the CT housing; each fastening screw is a double-ended stud, with one end installed on the CT housing and the other end connected to the circuit breaker housing.

5. The housing structure of a vertical current transformer as described in claim 4, characterized in that, Multiple mounting bases are fixedly installed on the circuit breaker housing, and the mounting bases are connected to the bottom end of the CT housing; a basin-type insulator is provided between the mounting base and the bottom end of the CT housing.

6. The housing structure of a vertical current transformer as described in claim 5, characterized in that, At least one guide rod is provided at the bottom of each CT housing. When the number of guide rods is greater than or equal to 2, the guide rods are evenly distributed around the bottom of the CT housing.

7. The housing structure of a vertical current transformer as described in claim 6, characterized in that, The length of the guide rod is greater than the total thickness of the basin-type insulator flange and the circuit breaker housing flange.

8. The housing structure of a vertical current transformer as described in claim 1, characterized in that, The positioning plate is an insulating plate, which is made of insulating material or a steel plate with insulating material on its surface. When the core of the positioning plate is a steel plate, the contour groove and the correction hole are provided with rigid insulating material.

9. The assembly method of the housing structure of a vertical current transformer as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Lift multiple CT housings to the set height, then use a spirit level to measure the bottom of the CT housings and level them so that they are in the same plane. Step 2: After leveling, install flat contour plates on multiple CT housings and fix the multiple CT housings with locking components to ensure that the multiple CT housings are axially parallel and their bottom ends are in the same plane. Step 3: Install the guide rod and fastening screw at the bottom of the CT housing. After installation, slowly lower the CT housing and connect it with the circuit breaker housing. During the lowering process, when the gap between the CT housing and the basin insulator is 10 cm, check and confirm the conductor alignment. When the gap between the CT housing and the basin insulator is 3 cm and 1 cm, check and clean to ensure the cleanliness of the insulation disc.

10. The assembly method of the housing structure of a vertical current transformer as described in claim 9, characterized in that, Apply a small amount of silicone grease to all guide rods and fastening screws to facilitate alignment and reduce the generation of metal shavings.

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