A connection device and method for a multiphase co-box conductor and an epoxy-insulated support.

Abstract

This invention discloses a connection device and method for a multiphase co-container conductor and an epoxy insulation support, comprising conductors, epoxy insulation supports, molds, and a hydraulic system. Multiple conductors are arranged in parallel and evenly distributed. Epoxy insulation supports are fitted onto the outer sides of each conductor. Both ends of the epoxy insulation supports are attached to the conductors, and molds are installed at both ends of each epoxy insulation support. One end of the mold is connected to the epoxy insulation support, and the other end is connected to the hydraulic system. The axes of the conductors and the hydraulic system are parallel to each other. A tight connection between the epoxy insulation support and the conductors is achieved by changing different molds. The method includes: passing the conductor through the epoxy insulation support; setting inclined wedges on the inner walls of both ends of the epoxy insulation support using a top wedge mold; pushing the inclined wedges into the interior of the epoxy insulation support and clamping them; changing the mold to a closing mold; and tightening the two ends of the epoxy insulation support using the closing mold. This method solves the problem of simultaneous processing of multiple phases while ensuring processing quality.

Description

Technical Field

[0001] This invention relates to the field of multiphase conductor connection, specifically to a connection device and method for a multiphase common-box conductor and an epoxy insulation support. Background Technology

[0002] Three-phase common-enclosure GIL conduit refers to a busbar drum containing three metal conductors, i.e., three-phase conductors. The three-phase conductors are fixedly connected to epoxy insulation supports to form a whole before being placed inside the busbar drum. The three-phase conductors are connected to the metal cylinder inserts on the epoxy insulation supports. The three-phase conductors and metal cylinder inserts are generally fixedly connected by welding, wedging or other methods.

[0003] The welding adopts a plug welding structure. Several plug welding holes are opened on the metal tube insert, and manual TIG welding is used to fill the plug welding holes with molten welding wire droplets.

[0004] The disadvantages of this process are: 1) High welding difficulty: The welding arc acts on the conductor surface of the plug hole, causing partial melting of the conductor surface. Simultaneously, the molten welding wire droplets fill the plug hole, ensuring full fusion between the droplets and the molten conductor surface. However, the welding process can easily result in the welding wire melting while some areas of the conductor surface remain unmelted, leading to incomplete fusion and a weak connection between the metal insert and the metal conductor, posing a quality hazard. 2) Because the incomplete fusion defect occurs inside the metal cylinder, there are no suitable detection methods to identify it, making it impossible to determine the reliability of the product quality. 3) During welding, the weld seam will protrude above the surface of the metal insert, resulting in weld excess. This excess needs to be removed through grinding and cleaning. Grinding dust adheres to the epoxy insulation support surface, and if subsequent cleaning is not thorough, the quality risk of the discharge is significant. 4) The high temperature generated during welding will be conducted along the metal insert to the epoxy cast insulation, affecting the quality of the insulation.

[0005] Given the problems associated with welding, a wedge connection between the metal conductor and the epoxy insulation support is more reliable. The wedge connection process involves inserting wedges into both sides of a metal cylinder, with the wedges facing each other and interlocking. This forces plastic deformation of the metal cylinder's edge, effectively closing the wedges inside and securing the conductor to the epoxy insulation support. However, this process is currently only used for wedge connections between single-phase conductors and epoxy insulation supports and has not yet been applied to three-phase common-enclosure GILs.

[0006] If three-phase conductors and epoxy-insulated supports are connected using a single-phase wedge-joining process, the following disadvantages exist: 1. To accommodate the single-phase wedge-joining device, during three-phase wedge-joining, the epoxy-insulated support and the three-phase conductors need to be rotated 120° after wedging one phase conductor before wedging the next. This results in high labor intensity, inconvenient operation, and potential safety hazards. 2. Since single-phase wedge-joining involves wedging three phase conductors one by one, there is a problem of accumulated wedging errors. When these errors accumulate to the last phase conductor, wedging becomes difficult or even impossible. 3. The phase-by-phase wedge-joining process is time-consuming and inefficient.

[0007] To solve the wedge connection problem between multiphase conductors and epoxy insulation supports in existing technologies, a new connection device and method for multiphase co-box conductors and epoxy insulation supports is urgently needed. Summary of the Invention

[0008] To address the problem of fixed connection between multiphase conductors and epoxy insulation supports in existing technologies, this invention provides a connection device and method for multiphase common-box conductors and epoxy insulation supports, which solves the problem of simultaneous processing of multiple phases while ensuring processing results.

[0009] This invention is achieved through the following technical solution:

[0010] A connection device for a multiphase co-container conductor and an epoxy insulation support includes conductors, epoxy insulation supports, molds, and a hydraulic system. Multiple conductors are arranged in parallel and evenly distributed. Epoxy insulation supports are fitted onto the outer sides of each conductor. Both ends of each epoxy insulation support are mounted on the conductors. Molds are mounted at both ends of each epoxy insulation support. One end of each mold is connected to the epoxy insulation support, and the other end of the mold is connected to the hydraulic system. The axes of the conductors and the hydraulic system are parallel to each other. A tight connection between the epoxy insulation support and the conductors is achieved by switching between different molds.

[0011] Furthermore, a conductor support is provided on one side of the conductor.

[0012] Furthermore, a multi-pillar support is provided on one side of the epoxy insulation support.

[0013] Furthermore, the mold is connected to a hydraulic system via a mold mounting plate.

[0014] Furthermore, the hydraulic system is equipped with multiple hydraulic cylinders, which are evenly distributed on the mold mounting plate at equal intervals.

[0015] Furthermore, a top wedge mold is provided at the end of the mold, and a wedge structure is provided between the epoxy insulation support and the conductor through the top wedge mold. The wedge structure is provided between the epoxy insulation support and the conductor, and the mold, conductor and epoxy insulation support are coaxially arranged.

[0016] Furthermore, the wedge structure is configured as a circular ring structure.

[0017] Furthermore, a closing mold is provided at the end of the mold, and the inner diameter of the closing mold is larger than the outer diameter of the epoxy insulation support.

[0018] A method for connecting a multiphase co-container conductor and an epoxy insulation support as described above, the method comprising the following steps:

[0019] The conductor is passed through the epoxy insulation support, and inclined wedges are set on the inner walls of both ends of the epoxy insulation support through the top wedge mold;

[0020] Push the wedge into the interior of the epoxy insulation support and lock it in place; then convert the mold into a closing mold.

[0021] The epoxy insulation support is tightened at both ends using a sealing mold.

[0022] Furthermore, the concentricity of the epoxy insulation support and the conductor is adjusted to be consistent before the conductor passes through the epoxy insulation support.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects:

[0024] This invention provides a connection device and method for a multiphase co-box conductor and an epoxy insulation support. The clamping effect is ensured by a hydraulic structure and mold setting. At the same time, the overall processing is ensured by processing operations at both ends of the device, which effectively improves the processing efficiency and ensures the stability of simultaneous processing of multiphase conductors.

[0025] Furthermore, in practice, by adjusting the concentricity of the epoxy insulation support and the conductor to be consistent, the concentricity of the epoxy insulation support and the conductor can be effectively ensured.

[0026] Furthermore, in order to address the problems of welding and single-phase wedge bonding, this invention adopts a wedge bonding process to achieve a reliable, safe, and efficient connection between the three-phase conductor and the epoxy insulation support. However, unlike the single-phase wedge bonding process, it proposes to perform three-phase synchronous wedge bonding. Through the modular replacement of the hydraulic system and mold, the integrity of the device is ensured. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1This is a schematic diagram of the structure of a connection device between a multiphase co-box conductor and an epoxy insulation support provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the wedge structure of a connection device between a multiphase co-box conductor and an epoxy insulation support provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the closing structure of a connection device for a multiphase co-box conductor and an epoxy insulation support provided in an embodiment of the present invention;

[0031] In the diagram: 1. Hydraulic system; 2. Conductor support; 3. Multi-pillar support; 5. Mold; 4. Mold mounting plate; 6. Epoxy insulation support; 7. Conductor; 10. Wedge structure. Detailed Implementation

[0032] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0037] In a preferred embodiment of the present invention, a connection device and method for a multiphase common-box conductor and an epoxy insulation support are provided.

[0038] In this embodiment, a three-phase common-box GIL conductor is being processed; it consists of a hydraulic system 1, a conductor support 2, a three-pillar support 3, a mold mounting plate 4, and a mold 5; wherein, the mold used in this embodiment includes a top wedge mold and a closing mold.

[0039] By setting the hydraulic system 1 to a structure of four hydraulic cylinders and evenly distributing the four hydraulic cylinders on 4, the force is applied to the mold mounting plate 4 through the four equally distributed hydraulic cylinders. The mold mounting plate 4 then evenly transmits the force to the mold 5. The wedge structure 10 at both ends of the epoxy insulation support 6 is pushed into the gap between the conductor 7 and the epoxy insulation support 6 by the top wedge mold. The wedges at both ends form an interlock, locking and fixing the conductor 7 and the epoxy insulation support 6, thus achieving reliable fixing of the epoxy insulation support 6 and the conductor 7.

[0040] The outer diameter of the wedge structure 10 is larger than the inner diameter of the epoxy insulation support 6 connection, and the ratio of the length of the wedge structure 10 to the gap of the epoxy insulation support 6 is (2~3):5; wherein, in this embodiment, the ratio of the length of the wedge structure 10 to the gap of the epoxy insulation support 6 is 1:2; the wedge structure is pushed into the gap between the conductor 7 and the epoxy insulation support 6 by the top wedge mold, and the wedge structure locks and fixes the conductor 7 and the epoxy insulation support 6, thereby realizing the synchronous fixed connection of the conductor 7 and the epoxy insulation support 6.

[0041] This achieves the purpose of three-phase synchronous wedging.

[0042] The interlocking formed by the wedge structures 10 at both ends of the epoxy insulation support 6, with the tightening force, simultaneously locks and fixes the conductor 7 and the epoxy insulation support 6 in the axial and radial directions of the conductor 10, thereby achieving effective fixation of the epoxy insulation support 6 and the conductor 7.

[0043] After the top wedge mold is completed, it is withdrawn and removed. The closing mold is then installed on the mold mounting plate 4. Four hydraulic cylinders apply force evenly to the mold mounting plate 4, which in turn transmits the force evenly to the closing mold. The closing mold forces the metal cylinder edge of the epoxy insulation support 6 to undergo plastic deformation and take shape, thus sealing the wedge inside the metal cylinder of the epoxy insulation support 6. This completes the three-phase synchronous wedge connection process.

[0044] In a method for connecting a multiphase co-box conductor and an epoxy insulation support, the epoxy insulation support 6 is placed on a multi-pillar support 3; the conductor 7 is placed on a conductor support 2, and the conductor 7 slides from the conductor support 2 one by one into the metal cylinder of the epoxy insulation support 6.

[0045] Before placing the epoxy-insulated support 6 and conductor 7, the multi-pillar support 3 and conductor support 2 should be leveled, aligned, and the spacing, height, and concentricity adjusted to ensure the concentricity of the connecting cylinder of the epoxy-insulated support 6 and the conductor 7, so that the conductor 7 can be fitted.

[0046] The hoisting crimping device is lowered onto the conductor 7 and fixed to the crimping device mold mounting plate 4 by the top wedge mold and the closing mold.

[0047] Using a top wedge mold, the inclined wedge structure 10 is pushed from the end of the connecting cylinder of the epoxy insulation support 6 into the gap between the connecting cylinder and the conductor 7, which is located inside the epoxy insulation support 6. After the inclined wedge structure has traveled a certain distance, it is pressed tightly. The ratio of the length of the inclined wedge structure 10 to the gap of the epoxy insulation support 6 is 1:2.

[0048] After the wedge structure is tightened, the end of the epoxy insulation support 6 is closed and shaped using a closing mold.

[0049] The wedge-fitting molds are independent of each other and do not affect each other, effectively adapting to the manufacturing precision and assembly gap of conductor 7 and epoxy insulation support 6, ensuring the reliability and consistency of three-phase synchronous crimping.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A connection device for a multiphase co-box conductor and an epoxy-insulated support, characterized in that, The system includes a conductor (7), an epoxy insulation support (6), a mold (5), and a hydraulic system (1). Multiple conductors (7) are provided, and the multiple conductors (7) are evenly distributed in parallel. Epoxy insulation supports (6) are respectively sleeved on the outer side of the multiple conductors (7). Both ends of the epoxy insulation support (6) are set on the conductors (7). Molds (5) are set on both ends of the epoxy insulation support (6). One end of the mold (5) is connected to the epoxy insulation support (6), and the other end of the mold (5) is connected to the hydraulic system (1). The axes of the conductors (7) and the hydraulic system (1) are parallel to each other. The fast connection between the epoxy insulation support (6) and the conductors (7) is achieved by changing different molds. A conductor support seat (2) is provided on one side of the conductor (7); a multi-pillar support seat (3) is provided on one side of the epoxy insulation support (6); The mold (5) is provided with a top wedge mold at its end. A wedge structure (10) is provided between the epoxy insulation support (6) and the conductor (7) through the top wedge mold. The wedge structure (10) is provided between the epoxy insulation support (6) and the conductor (7). The mold (5), the conductor (7) and the epoxy insulation support (6) are coaxially arranged.

2. The connection device for a multiphase common-box conductor and an epoxy insulation support according to claim 1, characterized in that, The mold (5) is connected to the hydraulic system (1) via the mold mounting plate (4).

3. The connection device for a multiphase common-box conductor and an epoxy insulation support according to claim 1, characterized in that, The hydraulic system (1) is equipped with multiple hydraulic cylinders, which are evenly distributed on the mold mounting plate (4).

4. The connection device for a multiphase common-box conductor and an epoxy insulation support according to claim 1, characterized in that, The wedge structure (10) is configured as a circular ring structure.

5. The connection device for a multiphase common-box conductor and an epoxy insulation support according to claim 1, characterized in that, The end of the mold (5) is provided with a closing mold, the inner diameter of which is larger than the outer diameter of the epoxy insulation support (6).

6. A method for connecting a multiphase co-enclosure conductor to an epoxy-insulated support, based on the connection device for a multiphase co-enclosure conductor and an epoxy-insulated support as described in any one of claims 1 to 5, characterized in that, The method includes the following steps: The conductor (7) is passed through the epoxy insulation support (6), and inclined wedges are set on the inner walls of both ends of the epoxy insulation support (6) through the top wedge mold; Push the wedge into the interior of the epoxy insulation support (6) and lock it in place; then change the mold to a closing mold. The epoxy insulation support (6) is tightened at both ends by using a closing mold.

7. The method for connecting a multiphase co-box conductor and an epoxy-insulated support according to claim 6, characterized in that, Before the conductor (7) passes through the epoxy insulation support (6), the concentricity of the epoxy insulation support (6) and the conductor (7) is adjusted to be consistent.

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