A water-blocking structure for a metal sheath of a rubber-sheathed wire conductor

Abstract

The application discloses a metal sleeve water-blocking structure of rubber-sheathed wire conductor and relates to the technical field of wire and cable manufacturing. The metal sleeve water-blocking structure of rubber-sheathed wire conductor comprises a cable sleeve made of rubber material, a cable core arranged in the cable sleeve, a connecting metal pipe used for connecting the two cable cores, a water-blocking mechanism used for preventing the cable core from being waterlogged, and a plurality of pressing blocks arranged on the outer surface of the connecting metal pipe. The metal sleeve water-blocking structure of rubber-sheathed wire conductor cancels the sealing mode of the connecting position by high-temperature adhesive tape in the prior art through the cooperation of the connecting metal pipe and the water-blocking mechanism, so that the device can effectively avoid the high-temperature water vapor from entering the cable core through the connecting gap, thereby affecting the use of the cable core. In addition, after the crimping of the device is completed, the resetting phenomenon can be effectively avoided, the loosening between the cable core and the connecting metal pipe is avoided, and the displacement of the cable is avoided.

Description

Technical Field

[0001] This invention relates to the field of wire and cable manufacturing technology, and in particular to a water-blocking structure for a rubber-sheathed conductor with a metal sheath. Background Technology

[0002] With the increasing application of special equipment cables, rubber-sheathed cables are becoming more widely used. Currently, most rubber-sheathed cables use Category 5 conductor technology, resulting in larger gaps between conductor strands. Due to steam pressure, water vapor can enter the conductor through these gaps at the connection point between the traction wire and the conductor. After cooling, the vapor crystallizes into water, causing oxidation at the conductor ends. The conventional solution is to use high-temperature tape to seal the connection. However, under high-temperature steam pressure, this tape cannot effectively prevent steam from entering the conductor, leading to frequent water ingress into the rubber-sheathed cable core, resulting in a high scrap rate and severely impacting product quality and manufacturing costs. To avoid this, metal sleeves are often used at the connection points of the two conductors. These sleeves are then compressed, and the connection is wrapped with tape.

[0003] However, when using metal sleeves for crimping connections, a certain amount of the wrapping layer needs to be cut at the cable connection point before crimping to expose the inner cable core. During the cutting process, the cut length cannot be guaranteed, resulting in a gap between the metal sleeve and the cable core after the metal sleeve is fitted onto it. Although high-temperature tape is used for wrapping, the tape may loosen under high-temperature steam pressure. Over time, high-temperature steam can enter through the gap between the metal sleeve and the cut cable, causing contact between the steam and the cable core, leading to overheating and short circuits. Furthermore, in existing metal sleeve crimping connections, the cable core is constantly under pressure, resulting in additional force on the metal sleeve. Over time, this can cause deformation at the crimped area, leading to loosening between the metal sleeve and the cable core. This can widen the gap between the metal sleeve and the cut cable, or even cause the sleeve to detach, thus affecting its usability. Summary of the Invention

[0004] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. This invention provides a water-blocking structure for a metal sheath of a rubber-sheathed conductor, addressing the issue that water can enter the cable core when cables are connected using high-temperature tape end caps, as the tape end caps may loosen due to high-temperature steam pressure.

[0005] The present invention adopts the following technical solution: a water-blocking structure for a rubber-sheathed conductor with a metal sleeve, comprising a cable sleeve made of rubber, a cable core disposed inside the cable sleeve, a connecting metal tube for connecting two cable cores, a water-blocking mechanism for preventing water from entering the cable core, a plurality of pressing blocks disposed on the outer surface of the connecting metal tube, connecting sleeves disposed on both sides of the connecting metal tube, a hollow soft sleeve disposed between the connecting sleeve and the connecting metal tube, an expansion sleeve disposed outside the hollow soft sleeve, a connecting layer being formed between the expansion sleeve and the hollow soft sleeve, and the connecting metal tube and the connecting sleeve being sleeved on the outside of the cable core.

[0006] Furthermore, the cross-section of the connecting metal tube is convex, and hollow soft sleeves are disposed on the inner surfaces of both ends of the connecting metal tube, with the inner diameter of the hollow soft sleeves being the same as the inner diameter of the connecting metal tube.

[0007] Furthermore, both the hollow soft sleeve and the connecting sleeve are made of rubber, while the connecting metal tube is made of metal.

[0008] Furthermore, the hollow soft sleeve and the expansion sleeve are connected under the action of the connecting layer.

[0009] Furthermore, the water-blocking mechanism includes a water-blocking sleeve, on which a plurality of positioning blocks are provided, and inside which a plurality of locking blocks are provided, the number of locking blocks corresponding to the number of positioning blocks. Each locking block has an insert and a groove at both ends, the outer surface of the insert has a locking block, the groove has a locking slot, and the inside of the water-blocking sleeve has a mating ring groove.

[0010] Furthermore, the height of the groove gradually decreases from the end inwards, and the initial gap between the groove and the connecting sleeve is greater than the thickness of the insert.

[0011] Furthermore, each of the connected inserts and grooves partially overlaps.

[0012] Furthermore, one end of the card block is arc-shaped, and the other end of the card block is right-angled; one end of the card slot is arc-shaped, and the other end of the card slot is right-angled; and the right-angled ends of each corresponding card block and card slot correspond to each other.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] Firstly, the water-blocking mechanism effectively prevents high-temperature water vapor from entering the connecting metal pipe through the gap between the cable sleeve and the connecting metal pipe. During use, the connection between the cable sleeve and the connecting metal pipe is made of a water-blocking sleeve, which is also made of a high-temperature resistant material. Therefore, when connecting the water-blocking sleeve and the cable sleeve, a crimping device is required. During the crimping process, the locking block inside the water-blocking sleeve deforms and shifts synchronously with the sleeve. This increases the overlap between the inserts and grooves at both ends of the locking block, until the locking block engages completely. Inside the groove, this indicates that the cable sleeve has been crimped in place. During the crimping process, because the cable sleeve is made of rubber, it will deform synchronously under the action of the locking block. The locking block is pressed into the cable sleeve, which not only fixes the position of the cable sleeve, but also effectively prevents high-temperature steam from entering through the gap between the cable sleeve and the water-blocking sleeve. Furthermore, during use, because the locking block and the slot are locked, although the cable sleeve will always provide an outward force to the locking sleeve, the action of the locking block and the slot can effectively prevent the water-blocking sleeve from resetting its deformation, thereby ensuring that there is no gap between the cable sleeve and the water-blocking sleeve.

[0015] Secondly, by using the connecting metal pipe and the water-blocking mechanism together, high-temperature steam can be prevented from entering the connecting metal pipe through the gap between the connecting metal pipe and the water-blocking sleeve, thus affecting the use of the cable core. During use, when the cable core is inserted into the connecting metal pipe, the positions of the matching annular groove and the expansion sleeve are aligned, making it easy to determine whether the connecting metal pipe and the water-blocking sleeve are properly connected. Once connected, the connecting metal pipe is pressed, and the deformation of the connecting metal pipe compresses the hollow soft sleeve, allowing the gas inside the hollow soft sleeve to enter the expansion sleeve, causing the expansion sleeve to expand. When the expansion sleeve expands, it fills the gap between the connecting metal pipe and the water-blocking sleeve, eliminating the gap between them and preventing high-temperature steam from entering the cable core through the gap. In the initial state, the expansion sleeve is in a contracted state, facilitating the connection between the connecting metal pipe and the water-blocking sleeve. Furthermore, since the hollow soft sleeve is made of a soft material, it can better contact and adhere to the cable core, resulting in a tighter contact.

[0016] In summary, when in use, this device eliminates the previous method of sealing the connection point with high-temperature tape by cooperating with the connecting metal pipe and the water-blocking mechanism. This effectively prevents high-temperature moisture from entering the cable core through the connection gap, thus affecting the use of the cable core. Furthermore, after the device is crimped, it effectively prevents reset phenomenon, which could cause loosening between the cable core and the connecting metal pipe, resulting in cable displacement. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the connection structure between the connecting metal tube and the cable sleeve of the present invention;

[0019] Figure 2 This is a schematic diagram of the connection structure between the connecting metal pipe and the water-blocking mechanism of the present invention;

[0020] Figure 3 This is a schematic diagram of the locking block structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the water-blocking mechanism of the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of the connecting metal tube of the present invention;

[0023] Figure 6 This is a schematic diagram of the locking block structure in the initial state of the present invention;

[0024] Figure 7 This is a schematic diagram of the locking block structure under the pressing state of the present invention.

[0025] Figure label:

[0026] 1. Connecting metal pipe; 11. Pressing block; 12. Hollow soft sleeve; 13. Expansion sleeve; 14. Connecting sleeve; 15. Connecting layer; 2. Water blocking mechanism; 21. Positioning block; 22. Locking block; 23. Locking block; 24. Locking groove; 25. Water blocking sleeve; 26. Groove; 27. Insertion block; 28. Matching ring groove; 3. Cable sleeve. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0029] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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 the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] The following is combined Figures 1 to 7 As shown, this embodiment of the invention provides a water-blocking structure for a rubber-sheathed conductor using a metal sheath, including a cable sleeve 3 made of rubber. The cable sleeve 3 contains a cable core and includes a connecting metal tube 1 for connecting two cable cores, and a water-blocking mechanism 2 for preventing water from entering the cable core. The outer surface of the connecting metal tube 1 is provided with several pressing blocks 11. Connecting sleeves 14 are provided on both sides of the connecting metal tube 1. A hollow soft sleeve 12 is provided between the connecting sleeve 14 and the connecting metal tube 1. An expansion sleeve 13 is provided outside the hollow soft sleeve 12. A connecting layer 15 is provided between the expansion sleeve 13 and the hollow soft sleeve 12. The connecting metal tube 1 and the connecting sleeve 14 are fitted over the cable core.

[0033] Specifically, the cross-section of the connecting metal tube 1 is convex, and the hollow soft sleeve 12 is disposed on the inner surface of both ends of the connecting metal tube 1. The inner diameter of the hollow soft sleeve 12 is the same as the inner diameter of the connecting metal tube 1.

[0034] During operation, the hollow soft sleeve 12 is designed so that it does not affect the fixing effect of the connecting metal tube 1 on the cable core.

[0035] Specifically, the hollow soft sleeve 12 and the connecting sleeve 14 are both made of rubber, and the connecting metal tube 1 is made of metal.

[0036] During operation, since the hollow soft sleeve 12 and the connecting sleeve 14 are made of soft material, when the connecting metal tube 1 is crimped, only the hollow soft sleeve 12 will deform, thereby improving the contact effect with the cable core.

[0037] Specifically, the hollow soft sleeve 12 and the expansion sleeve 13 are in a connected state under the action of the connecting layer 15.

[0038] During operation, when the hollow soft sleeve 12 is compressed, the expansion sleeve 13 can expand and deform to lock its position and improve the water-blocking effect.

[0039] Specifically, the water-blocking mechanism 2 includes a water-blocking sleeve 25, on which a plurality of positioning blocks 21 are provided, and inside the water-blocking sleeve 25, a plurality of locking blocks 22 are provided, the number of locking blocks 22 corresponding to the number of positioning blocks 21. At both ends of the locking blocks 22, there are insertion blocks 27 and grooves 26 respectively. On the outer surface of the insertion blocks 27, there are locking blocks 23. The grooves 26 have slots 24. Inside the water-blocking sleeve 25, there is a mating ring groove 28.

[0040] Specifically, the height of the groove 26 gradually decreases from the end inwards, and the initial gap between the groove 26 and the connecting sleeve 14 is greater than the thickness of the insert 27.

[0041] Specifically, this improves the crimping effect.

[0042] Specifically, each of the connected inserts 27 and grooves 26 partially overlap.

[0043] Specifically, when the insert 27 is pressed, it can play a guiding and positioning role under the action of the groove 26.

[0044] Working principle: Based on the actual conductor outer diameter, two suitable sets of molds are selected for the connecting metal tube 1 and the water-blocking mechanism 2. This allows the connecting metal tube 1 and the water-blocking sleeve 25 to be pressed together using different molds. The inner wall of the mold hole is hexagonal. A suitable length of the outer sheath is removed from the conductor end according to the length of the connecting metal tube 1. Then, the water-blocking sleeve 25 in the water-blocking mechanism 2 is fitted onto the connecting metal tube 1. During the fitting process, the expansion sleeve 13 outside the connecting metal tube 1 is inserted into the mating ring groove 28. After the fitting is completed, the connecting metal tube 1 is then fitted onto the outside of the cable core, and the water-blocking sleeve 25 is fitted onto the outside of the cable sleeve 3. At this time, the locking block 22 inside the water-blocking sleeve 25 contacts the outer surface of the cable sleeve 3. Then, the connecting metal tube 1 is pressed together using the pressing mold. During the crimping process, one set of molds is first crimped at the position corresponding to the pressing block 11. Setting the pressing block 11 prevents cable deflection due to core deformation during crimping. During crimping, the connecting metal tube 1 deforms first, subsequently deforming the hollow flexible sleeve 12, causing it to compress the gas inside. The compressed gas passes through the connecting layer 15 and enters the expansion sleeve 13, causing it to expand. The expanded expansion sleeve 13 then fits tightly against the mating annular groove 28, effectively preventing high-temperature steam from entering through the gap between the connecting metal tube 1 and the water-blocking sleeve 25. Both ends of the connecting metal tube 1 need to be crimped. After the pipe 1 is crimped, the water-blocking sleeve 25 is crimped using a mold and crimping tool. Before crimping, the mold is aligned with the positioning block 21, and then crimped using the crimping tool. During crimping, the water-blocking sleeve 25 begins to deform under the influence of the crimping tool and mold. During deformation, the locking block 22 inside the water-blocking sleeve 25 deforms and shifts synchronously with the water-blocking sleeve 25. At this time, the overlapping positions of the insert block 27 and the groove 26 at both ends of the locking block 22 increase until the locking block 23 is engaged in the groove 24. This indicates that the crimping is in place. Since the mold is hexagonal, and the positioning block 21 positions the crimping position, the relatively protruding positions are exactly at both ends of the locking block 22, so that the locking block 22 and the locking block 22 are engaged. The locking blocks 22 have a mutually resisting effect, making the connection between the locking blocks 23 and the slots 24 more secure. Due to the structure of the locking blocks 23 and slots 24, the locking blocks 23 can only enter the slots 24 and cannot move out, ensuring connection stability. During the crimping process, because the cable sleeve 3 is made of rubber, it deforms synchronously under the action of the locking blocks 22, pressing the locking blocks 22 into the cable sleeve 3. This not only fixes the position of the cable sleeve 3 but also effectively prevents high-temperature steam from entering through the gap between the cable sleeve 3 and the water-blocking sleeve 25. Furthermore, during use, because the locking blocks 23 and slots 24 are locked, although the cable sleeve 3 always provides an outward force to the locking sleeve...However, the locking block 23 and the locking slot 24 effectively prevent the water-blocking sleeve 25 from undergoing reset deformation, thus ensuring that there is no gap between the cable sleeve 3 and the water-blocking sleeve 25;

[0045] In summary, when this device is in use, the cooperation between the connecting metal pipe 1 and the water-blocking mechanism 2 eliminates the previous method of sealing the connection with high-temperature tape. This effectively prevents high-temperature moisture from entering the cable core through the connection gap, thus affecting the use of the cable core. Furthermore, after the device is crimped, it effectively prevents reset phenomenon, which could cause loosening between the cable core and the connecting metal pipe 1, resulting in cable displacement.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water-blocking structure for a rubber-sheathed conductor with a metal sheath, comprising a cable sheath (3), wherein the cable sheath (3) is made of rubber and a cable core is disposed inside the cable sheath (3), characterized in that; The cable core is provided with a connecting metal tube (1) for connecting two cable cores and a water-blocking mechanism (2) for preventing water from entering the cable core. The outer surface of the connecting metal tube (1) is provided with a plurality of pressing blocks (11). Connecting sleeves (14) are provided on both sides of the connecting metal tube (1). A hollow soft sleeve (12) is provided between the connecting sleeve (14) and the connecting metal tube (1). An expansion sleeve (13) is provided outside the hollow soft sleeve (12). A connecting layer (15) is provided between the expansion sleeve (13) and the hollow soft sleeve (12). The connecting metal tube (1) and the connecting sleeve (14) are sleeved on the outside of the cable core. The water-blocking mechanism (2) includes a water-blocking sleeve (25), on which a plurality of positioning blocks (21) are provided, and in which a plurality of locking blocks (22) are provided, the number of locking blocks (22) corresponding to the number of positioning blocks (21). Each locking block (22) has an insert (27) and a groove (26) at both ends. The outer surface of the insert (27) is provided with a locking block (23), and a slot (24) is provided on the groove (26). A mating ring groove (28) is provided in the water-blocking sleeve (25). Each of the connected inserts (27) and grooves (26) partially overlaps; One end of the card block (23) is arc-shaped, and the other end of the card block (23) is right-angled. One end of the card slot (24) is arc-shaped, and the other end of the card slot (24) is right-angled. The right-angled ends of each corresponding card block (23) and card slot (24) correspond to each other.

2. The water-blocking structure of a metal sheath for a rubber-sheathed conductor according to claim 1, characterized in that; The cross-section of the connecting metal tube (1) is convex, and the hollow soft sleeve (12) is set on the inner surface of both ends of the connecting metal tube (1). The inner diameter of the hollow soft sleeve (12) is the same as the inner diameter of the connecting metal tube (1).

3. The water-blocking structure of a metal sheath for a rubber-sheathed conductor according to claim 1, characterized in that; The hollow soft sleeve (12) and the connecting sleeve (14) are both made of rubber, and the connecting metal tube (1) is made of metal.

4. The water-blocking structure of a metal sheath for a rubber-sheathed conductor according to claim 1, characterized in that; The hollow soft sleeve (12) and the expansion sleeve (13) are connected under the action of the connecting layer (15).

5. The water-blocking structure of a metal sheath for a rubber-sheathed conductor according to claim 1, characterized in that; The height of the groove (26) gradually decreases from the end inward, and the initial gap between the groove (26) and the connecting sleeve (14) is greater than the thickness of the insert (27).

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