A z-type connection joint for a high-current flexible cable with IP68 protection

Abstract

This invention discloses a Z-type connector for high-current flexible cables with IP68 protection, comprising two cable bodies joined end-to-end, with exposed busbar ends at adjacent ends of the two cable bodies, the two busbar ends being aligned. It also includes: a fixing component for pressing and fixing the two busbar ends; a sealing sleeve fitted over the outer side of the contact area between the two busbar ends; and a heat-conducting plate disposed outside the sealing sleeve and thermally connected to the fixing component. This invention connects the two cable bodies through the fixing component, providing a larger total conductive cross-sectional area and a better heat dissipation path within the same space constraints, thereby significantly improving the rated current carrying capacity. Furthermore, the flexibility of the extended portion of the busbar ends effectively compensates for installation errors in multiple directions of the busbar system and displacement caused by thermal expansion and contraction, significantly reducing mechanical stress at the connection point.

Description

Technical Field

[0001] This invention relates to the field of power distribution equipment technology, specifically to a Z-type connector for high-current flexible cables with IP68 protection. Background Technology

[0002] Busbars, also known as power distribution busbars, are made of copper or aluminum and have a rectangular cross-section. They serve to transmit current and connect electrical equipment in power distribution equipment. They are conductors used to complete electrical connections. In busbar wiring, there are direct connection, L-shaped connection and T-shaped connection methods. The connection points form Z-type, L-type and T-type connection joints. The existing Z-type connection joints can basically meet the needs of power distribution, but there are still some shortcomings that need to be improved.

[0003] Patent document CN205882618U discloses an electrical cabinet busbar connection structure, comprising several busbars. Each busbar has a connecting square hole at its end. Adjacent busbars overlap vertically and are secured with fasteners. The fasteners include semi-circular head square neck bolts inserted into the connecting square holes and nuts fixed to the semi-circular head square neck bolts. This invention, by creating connecting square holes on the busbars and using semi-circular head square neck bolts to connect them, ensures the connection is secure. Since the semi-circular head square neck bolts can be fully engaged in the connecting square holes, it is easy to tighten the nuts, preventing loosening at the busbar connection points.

[0004] Currently, high-current flexible cable connections mainly employ rigid direct splicing and traditional flexible connections. Flexible cables generate Joule heating when carrying high currents, leading to temperature rise and linear expansion. In long-distance environments or environments with large temperature variations, rigid connections can generate significant mechanical stress due to the inability to release thermal stress. Over time, this can cause loosening of connecting bolts, increased contact resistance, and localized overheating; in severe cases, it can lead to deformation and cracking of the cable body or supporting insulators, resulting in serious accidents. Rigid connections also require extremely high precision in cable prefabrication and on-site installation, making it difficult to compensate for axial, radial, and angular installation deviations between equipment, posing significant construction challenges and exhibiting poor installation tolerance. Traditional flexible connections, to meet high current-carrying requirements, often require multiple layers of copper foil to form a very thick bundle structure. This structure has poor internal heat dissipation, resulting in severe heat accumulation and a significant reduction in actual current-carrying capacity. Furthermore, there is a risk of uneven current distribution across layers. The connection between the flexible connection and the cable body typically uses multiple bolts for crimping, resulting in numerous contact points and uneven pressure. Under long-term thermal cycling, this can easily lead to creep relaxation, causing unstable contact resistance and becoming a potential point of failure. Therefore, there is an urgent need for a Z-type connector with high-current flexible cable protection up to IP68 to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a Z-type connector for high-current flexible cables with IP68 protection, thereby overcoming the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A Z-type connector for high-current flexible cables with IP protection includes two cable bodies connected end-to-end, with exposed busbar ends at the adjacent ends of the two cable bodies, and the two busbar ends aligned. The connector also includes: a fixing component for pressing and fixing the two busbar ends; a sealing sleeve fitted over the outer side of the contact area between the two busbar ends, with its two ends sealed to the two cable bodies; and a heat-conducting plate disposed outside the sealing sleeve and thermally connected to the fixing component.

[0008] Preferably, the cable body is formed by bending a single thick busbar or by stacking and connecting multiple thin busbars in parallel.

[0009] Preferably, when the cable body adopts a multi-piece structure, an insulating thin layer or conductive paste is provided between the pieces.

[0010] Preferably, the non-connection area of ​​the cable body is provided with an insulating wrapping layer, and the insulating wrapping layer is made of a high thermal conductivity insulating material.

[0011] Preferably, the fixing component includes a first clamping plate, a second clamping plate, and a plurality of bolts. The first clamping plate and the second clamping plate are disposed on opposite sides of the two busbar end alignment positions, and the first clamping plate and the second clamping plate are connected by bolts. The busbar end is provided with a first through hole that matches the bolt.

[0012] Preferably, the first clamping plate is provided with a recessed groove that matches the head of the bolt, and the second clamping plate is provided with a threaded hole that is threaded to the tail of the bolt.

[0013] Preferably, the heat-conducting plate is provided with a connector for connecting bolts, and the sealing sleeve is provided with a second through hole that matches the connector.

[0014] Preferably, the bolt has a cylindrical cavity that matches the connector, the heat-conducting plate has a cavity, the connector is hollow so that the cylindrical cavity and the cavity are connected, and the cylindrical cavity and the cavity are filled with insulating heat-conducting liquid.

[0015] Preferably, a limiting groove is provided in the threaded hole, a limiting component is movably provided on the side wall of the bolt, and an elastic sealing ring is provided on the outer side of the end of the plug-in. When the plug-in is inserted and fixed in the cylindrical cavity, one end of the limiting component extends out of the side wall of the bolt to embed in the limiting groove, and the other end of the limiting component wedges with the elastic sealing ring for limiting.

[0016] Preferably, the bolt sidewall is provided with a sliding groove that matches the limiting member, and the end of the limiting member away from the cylindrical cavity is provided with two opposing elastic members, and the end of the sliding groove away from the cylindrical cavity is provided with a receiving groove that matches the two elastic members when they are retracted.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] This high-current flexible cable features a Z-type connector with IP protection. The connector links two cable bodies via a fixing component, creating a three-dimensional structure between the two busbar ends and the fixing component. Within the same space constraints, this provides a larger total conductive cross-sectional area and a better heat dissipation path, significantly increasing the rated current carrying capacity. Furthermore, the flexibility of the extended busbar ends effectively compensates for installation errors in multiple directions and displacement caused by thermal expansion and contraction, greatly reducing mechanical stress at the connection points and improving the long-term reliability of the system. A stable connection interface and stress release capability ensure long-term stable contact resistance, thereby reducing overall joint temperature rise and extending service life. Additionally, the heat-conducting plate, via the fixing component, can conduct heat from inside the busbar ends to the outside of the sealing sleeve, without affecting the sealing performance and enhancing heat dissipation.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0020] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall exploded structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 3 This is a frontal cross-sectional view of the present invention.

[0025] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A;

[0026] Figure 5This is a top view cross-sectional structural diagram of the present invention;

[0027] Figure 6 For the present invention Figure 5 A magnified structural diagram at point B in the middle.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Cable body; 2. Busbar end; 3. Sealing sleeve; 4. Heat-conducting plate; 5. First clamping plate; 6. Second clamping plate; 7. Bolt; 8. First through hole; 9. Sinking groove; 10. Threaded hole; 11. Connector; 12. Second through hole; 13. Cylindrical cavity; 14. Hollow cavity; 15. Limiting groove; 16. Limiting element; 17. Elastic sealing ring; 18. Sliding groove; 19. Elastic element; 20. Receiving groove. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0031] Please see Figure 1-6 The present invention provides a Z-type connector for high-current flexible cables with IP68 protection, comprising two cable bodies 1 connected end to end, with busbar ends 2 exposed at adjacent ends of the two cable bodies 1, the two busbar ends 2 being aligned, and further comprising: a fixing component for pressing and fixing the two busbar ends 2; a sealing sleeve 3, which is fitted on the outside of the contact position of the two busbar ends 2, and its two ends are sealed and connected to the two cable bodies 1; and a heat-conducting plate 4, which is disposed on the outside of the sealing sleeve 3 and is thermally connected to the fixing component.

[0032] Specifically, the cable body 1 is formed by bending a single thick busbar or by stacking and connecting multiple thin busbars in parallel; when the cable body 1 has a multi-piece structure, a thin insulating layer or conductive paste is provided between the pieces; an insulating wrapping layer is provided on the outside of the non-connection area of ​​the cable body 1, and the insulating wrapping layer is made of a high thermal conductivity insulating material; the busbar end 2 is rectangular flat and flexible; the fixing component presses the two busbar ends 2 together, applies contact pressure, reduces contact resistance, and reduces heat generation; the fixing component as a whole is made of conductive and thermally conductive material with good electrical and thermal conductivity; the sealing sleeve 3 is a flexible sleeve that covers the connection position of the two cable bodies 1 and the surrounding area. The material of the cable body 1 and the sealing sleeve 3 can also be a high thermal conductivity insulating material; the overall structural thickness of the fixing component clamping the two busbar ends 2 is 0~5mm greater than the thickness of the cable body 1, thereby ensuring that the outer surface of the fixing component is in contact with the sealing sleeve 3 for heat conduction; the two ends of the sealing sleeve 3 are connected to the outer surface of the cable body 1 by sealing and bonding, thereby ensuring the sealing of the connection position of the two cable bodies 1, and the sealing performance reaches IP68; the heat conduction plate 4 is made of a high thermal conductivity material and can be used as a nameplate to form an identification on the outer surface; the heat conduction plate 4 conducts the heat generated on the busbar end 2 through the fixing component, and then passively dissipates heat through the large surface. In practical use, this technical solution connects the two cable bodies 1 using a fixing component, forming a three-dimensional structure with the two busbar ends 2. Under the same space constraints, this provides a larger total conductive cross-sectional area and a better heat dissipation path, thus significantly improving the rated current carrying capacity. Furthermore, the flexibility of the extended portion of the busbar ends 2 effectively compensates for installation errors in multiple directions and displacement caused by thermal expansion and contraction, significantly reducing mechanical stress at the connection points and improving the long-term reliability of the system. A stable connection interface and stress release capability ensure long-term stable contact resistance, thereby reducing the overall joint temperature rise and extending service life. Additionally, the heat-conducting plate 4 can conduct heat from inside the busbar ends 2 to outside the sealing sleeve 3 via the fixing component, without affecting the sealing performance and enhancing heat dissipation. The optimized three-dimensional structure combined with highly thermally conductive insulating materials improves heat dissipation efficiency. Compared to the traditional "busbar + flexible connection" solution, this solution saves more space, is easier to install, and offers better consistency.

[0033] Compared with the prior art, the Z-type connector for high-current flexible cables with IP68 protection proposed in this embodiment connects two cable bodies 1 through a fixing component, so that the two busbar ends 2 and the fixing component form a three-dimensional structure. Under the same space constraints, it provides a larger total conductive cross-sectional area and a better heat dissipation path, thereby significantly improving the rated current carrying capacity. Moreover, the flexibility of the extended part of the busbar end 2 can effectively compensate for installation errors in multiple directions of the busbar system and displacement caused by thermal expansion and contraction, greatly reducing the mechanical stress at the connection point and improving the long-term reliability of the system. The stable connection interface and stress release capability ensure long-term stable contact resistance, thereby reducing the overall joint temperature rise and extending the service life. In addition, the heat-conducting plate 4 can conduct the heat inside the busbar end 2 to the outside of the sealing sleeve 3 through the fixing component, which does not affect the sealing performance and enhances the heat dissipation capacity.

[0034] As a preferred embodiment, the fixing assembly includes a first clamping plate 5, a second clamping plate 6, and a plurality of bolts 7. The first clamping plate 5 and the second clamping plate 6 are disposed on opposite sides of the aligned positions of the two busbar ends 2, and are connected by bolts 7. The busbar ends 2 are provided with first through holes 8 that match the bolts 7. Specifically, the first clamping plate 5 and the second clamping plate 6 are made of conductive and heat-conducting materials. They conduct electricity and heat by adhering to the busbar ends 2, and conduct heat to the sealing sleeve 3 by adhering to the sealing sleeve 3. Heat is dissipated by the sealing sleeve 3 to the outside; the material of the bolt 7 is preferably copper, which has good thermal conductivity; the diameter of the first through hole 8 matches that of the bolt 7, and the gap between the bolt 7 and the first through hole 8 is filled with thermal grease to improve thermal conductivity; during installation, the planar arrangement of the first through holes 8 on the two aligned busbar ends 2 is exactly consistent with the planar arrangement of the bolts 7 installed on the first clamping plate 5 and the second clamping plate 6; the length of the bolt 7 does not exceed the overall structural thickness after the first clamping plate 5 and the second clamping plate 6 clamp the busbar ends 2.

[0035] As a preferred technical solution in this embodiment, the first clamping plate 5 is provided with a recessed groove 9 that matches the head of the bolt 7, and the second clamping plate 6 is provided with a threaded hole 10 that is threadedly connected to the tail of the bolt 7. Specifically, the recessed groove 9 is used to accommodate the head of the bolt 7, preventing the bolt 7 from protruding from the outer surface of the first clamping plate 5 and ensuring that the outer surface of the first clamping plate 5 fits with the sealing sleeve 3; the threaded hole 10 corresponds one-to-one with the bolt 7, and the end part of the tail of the bolt 7 is provided with external threads, while the other parts are smooth.

[0036] As a preferred technical solution in this embodiment, the heat-conducting plate 4 is provided with a connector 11 for connecting the bolt 7, and the sealing sleeve 3 is provided with a second through hole 12 that matches the connector 11. Specifically, the connector 11 corresponds one-to-one with the bolt 7 and connects to one end of the tail of the bolt 7. The heat-conducting plate 4 is provided on the outside of the sealing sleeve 3, and the bolt 7 is connected after the connector 11 passes through the second through hole 12. This can position the sealing sleeve 3 and facilitate the installation of the sealing sleeve 3. Before the cable body 1 is connected, the sealing sleeve 3 is pre-fitted onto one side of the cable body 1.

[0037] In another embodiment of the present invention, the bolt 7 is provided with a cylindrical cavity 13 that matches the connector 11, and the heat-conducting plate 4 is provided with a cavity 14. The connector 11 is hollow so that the cylindrical cavity 13 and the cavity 14 are connected. The cylindrical cavity 13 and the cavity 14 are filled with insulating heat-conducting liquid. Specifically, a circulation path is preferably provided in the cavity 14, and the heat-conducting plate 4 is provided with a liquid replenishment port that connects to the cavity 14. The liquid replenishment port is sealed with a plug. The heat-conducting plate 4 can passively dissipate heat or it can have a built-in micro pump. The micro pump is driven by an independent power supply and can actively allow the insulating heat-conducting liquid to circulate in each cylindrical cavity 13 and cavity 14. 4. Internal flow, which is existing technology and will not be elaborated; the insulating heat-conducting fluid is preferably mineral oil, synthetic oil or fluorinated liquid, which has high insulation and good thermal conductivity. This can guide the heat absorbed by the bolt 7 to the heat-conducting plate 4 and then dissipate heat to the outside. Since the bolt 7 is in direct contact with the busbar end 2 inside the first clamping plate 5 and the second clamping plate 6, the heat accumulated on the contact surface can be guided to the heat-conducting plate 4 more quickly and then dissipated to the outside. This solves the problem of heat accumulation at the busbar end 2. In addition, the use of insulating heat-conducting fluid ensures that the heat-conducting plate 4 has both good thermal conductivity and insulation safety.

[0038] In another embodiment of the present invention, a limiting groove 15 is provided in the threaded hole 10, a limiting member 16 is movably provided on the side wall of the bolt 7, and an elastic sealing ring 17 is provided on the outer side of the end of the plug-in 11. When the plug-in 11 is inserted and fixed in the cylindrical cavity 13, one end of the limiting member 16 extends out of the side wall of the bolt 7 to embed in the limiting groove 15, and the other end of the limiting member 16 wedges with the elastic sealing ring 17 for limiting. Specifically, the limiting groove 15 is provided at the end of the threaded hole 10 near the end 2 of the busbar, and multiple limiting grooves 15 are evenly arranged around the circumference to match different angles relative to the threaded hole 10 after the bolt 7 is rotated and installed; the direction of movement of the limiting member 16 intersects the axial direction of the bolt 7 and forms a 40° angle. The included angle is set at 60°, and the limiting member 16 moves towards the busbar end 2 while moving outward from the bolt 7. Before the bolt 7 is installed and fixed, the limiting member 16 is limited within the outer surface of the bolt 7. At this time, one end of the limiting member 16 extends into the cylindrical cavity 13 and blocks the movement path of the plug-in 11 when it is inserted into the cylindrical cavity 13. The outer diameter of the elastic sealing ring 17 when it expands freely matches the inner diameter of the cylindrical cavity 13. When compressed, it can squeeze through the limiting member 16, one end of which has extended out of the outer wall of the bolt 7. When the elastic sealing ring 17 squeezes through the limiting member 16, the plug-in 11 is connected to the bolt 7, and the sealing sleeve 3 is tightly clamped between the second clamping plate 6 and the heat-conducting plate 4. The elastic sealing ring 17 limits the connection with the limiting member 16 to ensure that the plug-in 11 is connected and fixed to the bolt 7. On the other hand, it ensures the connection and sealing between the cylindrical cavity 13 and the plug-in 11, and avoids leakage of the insulating heat-conducting liquid.

[0039] In another embodiment of the present invention, the sidewall of the bolt 7 is provided with a sliding groove 18 that matches the limiting member 16. The end of the limiting member 16 away from the cylindrical cavity 13 is provided with two opposing elastic members 19. The end of the sliding groove 18 away from the cylindrical cavity 13 is provided with a receiving groove 20 that matches the two elastic members 19 when they are retracted. Specifically, the sliding groove 18 guides the limiting member 16 and is provided through the sidewall of the bolt 7. The free end of the elastic member 19 is provided towards the end of the bolt 7 that is away from the limiting member 16. There is frictional resistance between the free end of the elastic member 19 and the inner wall of the receiving groove 20. When the limiting member 16 is retracted into the sidewall of the bolt 7, the two elastic members 19 retract and are in the receiving groove 20. Due to the elastic force of the elastic member 19, its free end abuts against the inner wall of the receiving groove 20 with force, thereby fixing the position of the limiting member 16 relative to the sliding groove 18. In practical use, when the bolt 7 is installed, the limiting member 16 is housed within the outer wall of the bolt 7. At this time, the two elastic members 19 are retracted and located within the receiving groove 20, thereby maintaining the limiting member 16 fixed relative to the sliding groove 18. Then, the bolt 7 passes through the first through holes 8 corresponding to the two female busbar ends 2. After the bolt 7 is tightened, the head of the bolt 7 is embedded in the recessed groove 9, and the tail of the bolt 7 is threadedly connected to the threaded hole 10. At this time, the limiting member 16 and the limiting groove 15 are connected. Correspondingly; then move the sealing sleeve 3 to the target position, and then install the heat-conducting plate 4, so that the plug 11 passes through the second through hole 12 and is inserted into the cylindrical cavity 13 at the tail of the bolt 7. During the movement of the plug 11 in the cylindrical cavity 13, it pushes the limiting member 16 to one end of the cylindrical cavity 13. The limiting member 16 is then forced to move outward along the sliding groove 18. The elastic member 19 is also driven by the limiting member 16 to move outward in the receiving groove 20. When the elastic member 19 disengages from the receiving groove 20... At time 0, the elastic element 19 releases its elastic potential energy to open into a V-shape. At this time, the end of the limiting element 16 extending from the bolt 7 is embedded in the limiting groove 15. The elastic element 19, in its elastically open state, is squeezed into the limiting groove 15 to stabilize the relative position of the limiting element 16 and the limiting groove 15. This restricts the rotation of the bolt 7 and prevents the bolt 7 from loosening. In addition, after the limiting element 16 is embedded in the limiting groove 15, the end of the limiting element 16 in the cylindrical cavity 13 is just offset from the end face of the insert 11, and is in contact with the elastic element 19. When the sealing ring 17 is in place, the insert 11 continues to penetrate into the cylindrical cavity 13, causing the elastic sealing ring 17 to be squeezed through the limiting member 16 at one end within the cylindrical cavity 13. After the elastic sealing ring 17 passes through the limiting member 16, it automatically elastically recovers, and the limiting member 16 and the elastic sealing ring 17 automatically form a wedge-shaped fit for limiting, thereby achieving a stable connection between the heat-conducting plate 4 and the bolt 7, and ensuring the sealing performance of the connection between the insert 11 and the cylindrical cavity 13.

[0040] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A Z-type connecting joint with IP68 protection for a large-current flexible cable, comprising two cable bodies (1) connected head to tail, and a busbar end head (2) exposed at the proximal end of each of the two cable bodies (1), and the two busbar end heads (2) are arranged in alignment, characterized in that, Also includes: A fixing component is used to press and fix the two busbar ends (2); The sealing sleeve (3) is fitted on the outside of the mating position of the two busbar ends (2), and its two ends are sealed and connected to the two cable bodies (1); A heat-conducting plate (4) is disposed on the outside of the sealing sleeve (3) and is thermally connected to the fixing assembly.

2. The Z-type connector for high-current flexible cables with IP68 protection as described in claim 1, characterized in that, The cable body (1) is formed by bending a single thick busbar or by stacking and connecting multiple thin busbars in parallel.

3. The Z-type connector for high-current flexible cables with IP68 protection as described in claim 2, characterized in that, When the cable body (1) adopts a multi-piece structure, an insulating thin layer or conductive paste is provided between the pieces.

4. The Z-type connector for high-current flexible cables with IP68 protection as described in claim 1, characterized in that, The cable body (1) has an insulating wrapping layer on the outside of the non-connection area, and the insulating wrapping layer is made of a high thermal conductivity insulating material.

5. The Z-type connector for high-current flexible cables with IP68 protection as described in claim 1, characterized in that, The fixing assembly includes a first clamping plate (5), a second clamping plate (6) and a plurality of bolts (7). The first clamping plate (5) and the second clamping plate (6) are arranged on opposite sides of the alignment position of the two busbar ends (2). The first clamping plate (5) and the second clamping plate (6) are connected by bolts (7). The busbar end (2) is provided with a first through hole (8) that matches the bolt (7).

6. The Z-type connector for high-current flexible cables with IP68 protection as described in claim 5, characterized in that, The first clamping plate (5) is provided with a recessed groove (9) that matches the head of the bolt (7), and the second clamping plate (6) is provided with a threaded hole (10) that is threaded to the tail of the bolt (7).

7. The Z-type connector for high-current flexible cables with IP68 protection as described in claim 6, characterized in that, The heat-conducting plate (4) is provided with a plug (11) for connecting bolts (7), and the sealing sleeve (3) is provided with a second through hole (12) that matches the plug (11).

8. The Z-type connector for high-current flexible cables with IP68 protection as described in claim 7, characterized in that, The bolt (7) has a cylindrical cavity (13) that matches the plug (11), the heat-conducting plate (4) has a cavity (14), the plug (11) is hollow so that the cylindrical cavity (13) and the cavity (14) are connected, and the cylindrical cavity (13) and the cavity (14) are filled with insulating heat-conducting liquid.

9. The Z-type connector for high-current flexible cables with IP68 protection as described in claim 8, characterized in that, A limiting groove (15) is provided in the threaded hole (10), a limiting member (16) is movably provided on the side wall of the bolt (7), and an elastic sealing ring (17) is provided on the outer side of the end of the plug-in (11). When the plug-in (11) is inserted and fixed in the cylindrical cavity (13), one end of the limiting member (16) extends out of the side wall of the bolt (7) to be embedded in the limiting groove (15), and the other end of the limiting member (16) is wedge-shaped with the elastic sealing ring (17) for limiting.

10. The Z-type connector for high-current flexible cables with IP68 protection as described in claim 9, characterized in that, The bolt (7) has a sliding groove (18) on its side wall that matches the limiting member (16). The limiting member (16) has two opposing elastic members (19) at one end away from the cylindrical cavity (13). The sliding groove (18) has a storage groove (20) at one end away from the cylindrical cavity (13) that matches the two elastic members (19) when they are closed.

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