A cable joint conductor fusion structure

Abstract

The utility model relates to a cable joint conductor fusion structure, including providing installation seat of disposition plane, through support post and fusion die are connected on the installation seat to still have the auxiliary reinforcing component of being able to with the fusion die insert installation connection and forming with the backfill compensation auxiliary cavity that the fusion die defines the fusion die cavity intercommunication on the installation seat, the fusion die includes with the fixed mould body of support rod connection and the movable mould body of detachably buckling on fixed mould body and still detachably installable additional plugging assembly that can carry out selective closure to injection hole on movable mould body, the utility model can through the mode of compensation formula pressurization backfill fusion solution and promote the saturation of copper liquid in the fusion die cavity to the die cavity filling and promote the conductor whole quality and conductive performance after copper liquid solidification into copper line body.

Description

Technical Field

[0001] This utility model relates to the field of cable conductor welding mold technology, and in particular to a cable joint conductor welding structure. Background Technology

[0002] Cable splicing is a crucial and frequently encountered operation during the construction and installation of power cables. It is primarily used in situations requiring a reliable connection between two or more sections of power cable. In practice, workers use specialized cable splicing equipment and a splicing mold to shape and connect molten copper at high temperatures to the ends of the two conductors, thus achieving a seamless connection between the two cable cores. This splicing process allows the cable conductors to fully fuse at the molecular level, forming a regenerated composite with continuous conductivity and mechanical strength equivalent to the original cable, providing a reliable guarantee for the safe and stable operation of the power system.

[0003] Current cable splicing operations primarily involve pouring molten copper into a splicing mold containing two cable conductors. The molten copper, solidified within the mold cavity and of the same material as the conductors, achieves a seamless connection between the two conductors, ensuring molecular-level fusion and guaranteeing the quality and effectiveness of the splice. However, existing splicing molds typically lack pressure compensation structures. The simple gravity-feeding operation cannot guarantee sufficient mold cavity filling, resulting in low saturation. This low saturation easily leads to defects such as pores, pits, and internal voids when the molten copper solidifies into copper wire. These defects affect the quality and conductivity of the solidified connector and can also cause insufficient tensile strength in that section of the cable core conductor. Utility Model Content

[0004] The purpose of this invention is to provide a cable joint conductor welding structure that can improve the overall quality and conductivity of the conductor after the copper liquid solidifies into a copper wire by increasing the saturation of the copper liquid in the welding mold cavity through a compensating pressurized reinjection of welding solution. This solves the problem that the existing welding mold cavity has a low filling saturation, which easily leads to defects such as air holes, pits and internal voids when the copper liquid solidifies into a copper wire, affecting the quality and conductivity of the solidified connector, and also causing insufficient tensile strength of the cable core conductor.

[0005] The technical solution adopted by this utility model is as follows: a cable joint conductor welding structure, including a mounting base providing a mounting plane, a welding mold connected to the mounting base via a support rod, and an auxiliary reinforcement component connected to the mounting base, which can be inserted and connected to the welding mold to form a refill compensation sub-cavity communicating with the welding mold cavity defined by the welding mold. The welding mold includes a fixed mold body connected to the support rod and a movable mold body detachably fastened to the fixed mold body, and an additional sealing component capable of selectively closing the injection hole can be detachably installed on the movable mold body.

[0006] According to a preferred embodiment, a first semicircular groove is formed on the top surface of the fixed mold body, and a second semicircular groove is formed on the bottom surface of the movable mold body, which is formed on the top surface of the fixed mold body and can cooperate with the first semicircular groove to form a cylindrical through-groove cavity. In this way, when the connector conductors of the two cables are inserted from the two corresponding ports of the cylindrical through-groove cavity, a welding mold cavity that can be connected to the connector conductors is constructed.

[0007] According to a preferred embodiment, sealing strips capable of filling the mating gaps and assembly gaps during connector conductor insertion are embedded in the mating surfaces of the fixed mold and the movable mold, as well as the arcuate groove walls of the first and second semicircular grooves.

[0008] According to a preferred embodiment, insert columns are supported at the corners of the top surface of the fixed mold body, and threaded columns are coaxially connected to the upper axial ends of the insert columns; a guide column head is provided at the upper axial end of the threaded column in a coaxially connected and integrally formed manner; a screw-limiting sleeve capable of limiting the docking form between the fixed mold body and the movable mold body is detachably threaded onto the threaded column; and a through-hole communicating with the auxiliary reinforcing component is also provided at the bottom of the fixed mold body.

[0009] According to a preferred embodiment, through-holes corresponding to the insert pins are provided on the bottom surface of the movable mold body, and a sprue hole communicating with the cavity of the second semi-circular groove is provided at the center of the top surface of the movable mold body. Furthermore, an extension tube communicating with the cavity of the sprue hole and connected to the top surface of the movable mold body is provided at the top end of the sprue hole.

[0010] According to a preferred embodiment, the auxiliary reinforcement assembly includes a reinforcing cylinder, a piston body, a push-pull column, a lifting adjustment seat, and a hydraulic lifting column. The upper axial end of the reinforcing cylinder is tightly inserted into the bottom surface of the fixed mold body in a manner that communicates with the through port 316. The piston body is movably embedded in the reinforcing cylinder, and the bottom of the piston body is connected to a push-pull column extending to the outside of the reinforcing cylinder. The lower axial end of the push-pull column is connected to the hydraulic lifting column supported on the mounting base through the lifting adjustment seat.

[0011] According to a preferred embodiment, the lifting adjustment seat includes a base plate, an internal threaded sleeve, a stud, and a top plate. The internal threaded sleeve is rotatably connected to the top surface of the base plate, the stud is threaded into the top port of the internal threaded sleeve, and the top plate is rotatably connected to the upper axial end of the stud. The top plate is connected to the lower axial end of the push-pull column.

[0012] According to a preferred embodiment, the additional sealing assembly includes a plug adapted to the injection port and a limiting sleeve that movably abuts against the top of the plug to define an insertion position of the plug.

[0013] The beneficial effects of this utility model are: The auxiliary reinforcement component provided in this application can improve the filling saturation of the copper liquid in the welding mold cavity by reversing the copper liquid back into the welding mold cavity. This effectively compensates for defects such as pores, pits, and internal voids that occur when the copper liquid solidifies into copper wire. As a result, the solidified copper wire can better fit the contour of the welding mold cavity, giving the welded body better quality and conductivity. To a certain extent, it also improves the tensile strength of the cable core conductor, ensuring that the welded power cable not only has a smooth and flat appearance, but more importantly, that its electrical and mechanical properties meet the design requirements.

[0014] The fixed and movable molds of this application can be spliced ​​together so that the two semi-circular grooves can be joined to form a complete circular channel for accommodating the connector conductor, ensuring accurate positioning of the connector conductor during the welding process. At the same time, the irregularly shaped sealing strip fits tightly against the groove wall when the mold is closed, effectively preventing the molten material from overflowing and ensuring welding quality and operational safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred conductor welding structure for a cable joint proposed in this utility model; Figure 2 This is a cross-sectional view of a preferred conductor welding structure for a cable joint proposed in this utility model; Figure 3 This is a cross-sectional view of a preferred cable joint conductor welding structure proposed in this utility model during copper refilling. Figure 4 This is a cross-sectional schematic diagram of a welding mold for a preferred cable joint conductor welding structure proposed in this utility model; Figure 5 This is a schematic diagram of the sealing strip of a preferred cable joint conductor welding structure proposed in this utility model. Detailed Implementation

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0018] The following is a detailed explanation with reference to the accompanying drawings. Example

[0019] This application provides a cable joint conductor welding structure, which includes a mounting base 1, a support rod 2, a welding mold 3, an auxiliary reinforcement component 4, and an additional sealing component 5.

[0020] according to Figure 1-5In one specific embodiment shown, the mounting base 1 provides a stable mounting surface to facilitate a common assembly base for functional modules such as the support rod 2 and the auxiliary reinforcement component 4. The mounting base 1 is connected to the welding mold 3 via the support rod 2. The welding mold 3 includes a fixed mold body 31 connected to the support rod 2 and a movable mold body 32 detachably fastened to the fixed mold body 31. An auxiliary reinforcement component 4 is also connected to the mounting base 1, capable of inserting into the fixed mold body 31 of the welding mold 3 to form a refill compensation sub-cavity communicating with the welding cavity defined by the welding mold 3. An additional sealing component 5, capable of selectively closing the injection hole 323, is also detachably mounted on the movable mold body 32. The auxiliary reinforcing component 4 provided in this application can increase the filling saturation of the molten copper in the welding mold cavity by reversing the injection of molten copper into the welding mold cavity. This effectively compensates for defects such as pores, pits, and internal voids that occur when the molten copper solidifies into copper wire. This allows the solidified copper wire to better fit the contour of the welding mold cavity, resulting in better quality and conductivity of the welded body. It also improves the tensile strength of the conductor in this section of the cable core to a certain extent, ensuring that the welded power cable not only has a smooth and flat appearance, but more importantly, that its electrical and mechanical properties meet the design requirements. The additional sealing component 5 provided in this application can detachably and effectively seal the injection hole 323 after the molten copper is injected, thereby ensuring the mold cavity is sealed when pressurizing to increase saturation, thus ensuring the effective implementation of the pressure compensation process.

[0021] Preferably, a first semicircular groove 311 is formed transversely through the top surface of the fixed mold 31. More preferably, a second semicircular groove 321 is formed transversely through the bottom surface of the movable mold 32, which can cooperate with the first semicircular groove 311 to form a cylindrical through-cavity, thereby constructing a welding cavity that can connect with the connector conductors when the connector conductors of the two cables are inserted from the two aligned ports of the cylindrical through-cavity. Preferably, sealing strips 33 are embedded in the mating surfaces of the fixed mold 31 and the movable mold 32, as well as in the arcuate groove walls of the first semicircular groove 311 and the second semicircular groove 321, to fill the mating gaps and the assembly gaps during connector conductor insertion. Preferably, the sealing strip is composed of two semi-circular strips at both ends and two long straight strips. The ends of the two parallel semi-circular strips are connected by two long straight strips that are perpendicular to and parallel to each other, thereby forming an integrally linked sealing strip with an irregular structure. This allows for the simultaneous filling of the mating gap between the fixed mold 31 and the movable mold 32, as well as the assembly gap between the connector conductor and the groove wall. Specifically, the semi-circular strips are fitted into the groove walls of the first semi-circular groove 311 and the second semi-circular groove 321 with their defined plane perpendicular to the axis of the cylindrical through-groove cavity, to fill the assembly gap between the connector conductor and the inner wall of the cylindrical through-groove cavity when the conductor is inserted. Specifically, long straight strips are aligned and embedded on the top surfaces of the fixed mold 31 on both sides of the first semicircular groove 311 and on the bottom surfaces of the movable mold 32 on both sides of the second semicircular groove 321. These two sets of aligned and deforming long straight strips effectively fill the gap between the fixed mold 31 and the movable mold 32, ensuring the sealing of the cylindrical through-groove wall. The fixed mold 31 and the movable mold 32 can be joined together to form a complete circular channel for accommodating the connector conductor, ensuring accurate positioning of the connector conductor during welding. Simultaneously, the irregularly shaped sealing strips tightly adhere to the groove wall when the molds are closed, effectively preventing molten material from overflowing and ensuring welding quality and operational safety.

[0022] Preferably, insert pillars 312 are supported at the corners of the top surface of the fixed mold body 31. More preferably, the upper axial end of the insert pillar 312 is coaxially connected to a threaded pillar 313 integrally formed therewith. Preferably, the upper axial end of the threaded pillar 313 is provided with a guide pillar head 314 in a coaxially connected and integrally formed manner. Preferably, a screw-limiting sleeve 315 capable of limiting the docking configuration between the fixed mold body 31 and the movable mold body 32 is detachably threaded onto the threaded pillar 313. Preferably, a through-hole 316 communicating with the auxiliary reinforcing component 4 is also provided at the bottom of the fixed mold body 31. Preferably, the cross-sectional area of ​​the insert pillar 312 is larger than the cross-sectional area of ​​the threaded pillar 313, and the upper axial end of the insert pillar 312 precisely guides the assembly docking of the movable mold body 32 by constructing a frustum-shaped ring wall, and corrects the relative position of the insert. More preferably, the insert pillar 312 is fixed to the four corners of the top surface of the fixed mold body by welding or other methods. Preferably, the screw-locking sleeve 315 includes a nut body and aligning screw-locking fins arranged on both sides of the nut body.

[0023] Preferably, through-holes 322 corresponding to the insert pins 312 are provided on the bottom surface of the movable mold body 32. Preferably, the through-holes 322 have a cavity cross-section that matches the cross-section of the insert pins 312. More preferably, the length of the through-holes 322 is greater than the length of the insert pins 312, so that the screw-fitting limiting sleeve 315 threaded onto the threaded pin 313 can effectively abut against the top surface of the movable mold body 32, thereby firmly defining the docking configuration of the fixed mold body 31 and the movable mold body 32. Preferably, a filling hole 323 communicating with the cavity of the second semi-circular groove 321 is provided at the center of the top surface of the movable mold body 32. More preferably, the top end of the filling hole 323 is also provided with an extension tube 324 communicating with its cavity and connected to the top surface of the movable mold body 32 by welding or integral casting. Preferably, the outer wall surface of the extension tube 324 is provided with external threads.

[0024] Preferably, the auxiliary reinforcing component 4 includes a return cylinder 41, a piston body 42, a push-pull column 43, a lifting adjustment seat 44, and a hydraulic lifting column 45. Preferably, the upper axial end of the return cylinder 41 is tightly inserted into the bottom surface of the fixed mold body 31 in a manner that communicates with the through port 316, thereby connecting its cylinder cavity with the welding mold cavity. Preferably, the piston body 42 is movably embedded in the return cylinder 41, thereby forming a return filling compensation secondary cavity with the cylinder cavity of the return cylinder 41 with the variable size on the piston body 42 and the cavity communicating with the welding mold cavity. More preferably, the bottom of the piston body 42 is connected to a push-pull column 43 extending to the outside of the return cylinder 41. Preferably, the lower axial end of the push-pull column 43 is connected to the hydraulic lifting column 45 supported on the mounting base 1 through the lifting adjustment seat 44. Specifically, a fixed arc plate is fitted on the return cylinder 41, and the fixed arc plate is attached and welded to the bottom surface of the fixed mold body 31 to ensure the stability of the insertion and docking of the return cylinder 41. Preferably, the two ends of the hydraulic lifting column 45 are connected to the lifting adjustment seat 44 and the mounting seat 1 respectively via bolt flange structures. Preferably, the piston body 42 has an arc surface that matches the groove cavity surface of the first semi-circular groove 311, so that it can form a semi-cylindrical cavity wall that matches the groove wall of the first semi-circular groove 311. Specifically, the cylinder cavity of the reinjection cylinder 41, the piston body 42, and the inner cavity of the through port 316 all have matching rectangular cross sections. Preferably, the piston body 42 can be made of a block structure of metal materials such as 38CrMoAlAn alloy and plated with 0.03-0.05mm chromium to ensure its high temperature resistance and corrosion resistance. More preferably, the piston body 42 has a cross-sectional size that perfectly matches the cross section of the cylinder cavity of the reinjection cylinder 41 to ensure high-precision fitting. More preferably, a sealing ring is embedded on the ring wall of the piston body 42 to ensure sealing performance. Preferably, the sealing ring is a flexible graphite gasket that is resistant to high temperature and corrosion. More preferably, the upper axial end of the push-pull column 43 is connected to the piston body 42 by welding or other means, and the lower axial end of the push-pull column 43 is connected to the lifting adjustment seat 44 by bolts, flanges or welding. Preferably, the hydraulic lifting column 45 adopts the TBZ-219P integrated hydraulic type, which uses a closed-loop hydraulic servo system, with a lifting positioning error ≤ ±0.2mm, supports 0.1MPa pressure fine adjustment 12, and has a built-in high-response hydraulic servo valve, a micro hydraulic unit (IP68 waterproof), a lifting speed ≤ 2.5 seconds, a repeat positioning life > 500,000 times, and is powered by a battery or other mobile power source to adapt to various different scenario requirements.

[0025] Preferably, the lifting adjustment seat 44 includes a base plate 441, an internally threaded sleeve 442, a stud 443, and a top plate 444. Preferably, the base plate 441 is connected to the upper axial end of the hydraulic lifting column 45. More preferably, the internally threaded sleeve 442 is rotatably connected to the top surface of the base plate 441. Preferably, the stud 443 is threaded into the top port of the internally threaded sleeve 442. More preferably, the upper axial end of the stud 443 is rotatably connected to the top plate 444, and the top plate 444 is connected to the lower axial end of the push-pull column 43.

[0026] Preferably, the additional sealing assembly 5 includes a plug 51 adapted to the injection hole 323 and a limiting sleeve 52 that movably abuts against the top of the plug 51 to define the insertion position of the plug 51. Preferably, the cavity of the injection hole 323 and the plug 51 have a quadrangular prism profile with the same volume. More preferably, the plug 51 also includes an insert limiting post connected to the top of the quadrangular prism, and the bottom end of the quadrangular prism has an arc surface that matches the groove surface of the second semi-circular groove 321, so that it can fit with the groove wall of the second semi-circular groove 321 to form a semi-cylindrical cavity wall. More preferably, the side wall of the quadrangular prism is also fitted with a high-temperature and corrosion-resistant sealing ring made of flexible graphite or the like. Preferably, the inner wall surface of the limiting sleeve 52 is provided with internal threads, so that it can be threaded onto the extension tube 324.

[0027] Preferably, the electrical components such as the hydraulic lifting column 45 involved in this application are all connected to the controller and a mobile power source such as a storage battery. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0028] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0029] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A cable joint conductor welding structure, comprising a mounting base (1) providing a mounting plane, characterized in that, The mounting base (1) is connected to the welding mold (3) via a support rod (2), and an auxiliary reinforcing component (4) is also connected to the mounting base (1) to form a refill compensation sub-cavity that can be inserted and connected to the welding mold (3) to form a welding cavity that communicates with the welding mold cavity defined by the welding mold (3). The welding mold (3) includes a fixed mold body (31) connected to the support rod (2) and a movable mold body (32) detachably fastened to the fixed mold body (31), and an additional sealing component (5) capable of selectively closing the injection hole (323) is also detachably installed on the movable mold body (32).

2. The cable joint conductor fusion welding structure as described in claim 1, characterized in that, A first semicircular groove (311) is provided on the top surface of the fixed mold (31) and a second semicircular groove (321) is provided on the bottom surface of the movable mold (32) and can cooperate with the first semicircular groove (311) to form a cylindrical through-groove cavity. Thus, when the connector conductors of the two cables are inserted from the two aligning ports of the cylindrical through-groove cavity, a welding mold cavity that can be connected to the connector conductors is constructed.

3. The cable joint conductor fusion welding structure as described in claim 2, characterized in that, Sealing strips (33) capable of filling the mating gap and the assembly gap during connector conductor insertion are embedded on the mating surfaces of the fixed mold (31) and the movable mold (32) and the arc groove walls of the first semicircular groove (311) and the second semicircular groove (321).

4. The cable joint conductor fusion splicing structure as described in claim 3, characterized in that, The corner of the top surface of the fixed mold (31) is supported by a plug-in column (312), and the upper axial end of the plug-in column (312) is coaxially connected to a threaded column (313). The threaded column (313) is provided with a guide column head (314) at its axial upper end in a coaxial connection and integrally formed manner. The threaded post (313) is also detachably threaded with a screw-locking sleeve (315) that can limit the docking configuration of the fixed mold (31) and the movable mold (32). A through-hole (316) communicating with the auxiliary reinforcing component (4) is also provided at the bottom of the fixed mold (31).

5. The cable joint conductor fusion welding structure as described in claim 4, characterized in that, Through-holes (322) corresponding to the insert post (312) are provided on the bottom surface of the movable mold (32). An injection hole (323) communicating with the cavity of the second semi-circular groove (321) is provided at the center of the top surface of the movable mold (32), and an extension tube (324) communicating with its cavity and connected to the top surface of the movable mold (32) is also provided at the top of the injection hole (323).

6. The cable joint conductor welding structure as described in claim 5, characterized in that, The auxiliary reinforcement component (4) includes a return cylinder (41), a piston body (42), a push-pull column (43), a lifting adjustment seat (44), and a hydraulic lifting column (45), wherein, The upper axial end of the reinjection cylinder (41) is tightly inserted into the bottom surface of the fixed mold body (31) in a manner that communicates with the through port (316). The piston body (42) is movably embedded in the reinjection cylinder (41), and the bottom of the piston body (42) is connected to a push-pull column (43) extending to the outside of the reinjection cylinder (41). The lower axial end of the push-pull column (43) is connected to the hydraulic lifting column (45) supported on the mounting base (1) via the lifting adjustment seat (44).

7. The cable joint conductor fusion splicing structure as described in claim 6, characterized in that, The lifting adjustment seat (44) includes a base plate (441), an internal threaded sleeve (442), a stud (443), and a top plate (444), wherein, An internal threaded sleeve (442) is rotatably connected to the top surface of the base plate (441). The stud (443) is threaded into the top port of the internal threaded sleeve (442). The upper axial end of the stud (443) is rotatably connected to a top plate (444). The top plate (444) is connected to the lower axial end of the push-pull column (43).

8. The cable joint conductor fusion welding structure as described in claim 7, characterized in that, The additional sealing assembly (5) includes a plug (51) adapted to the injection hole (323) and a limiting sleeve (52) that movably abuts against the top of the plug (51) to define the insertion position of the plug (51).

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