Armored cable

Abstract

The utility model provides an armored cable, and relates to the technical field of cables, the armored cable comprises a cable body, the cable body comprises a conductor and a sheath wrapping the periphery of the conductor, the end portion of the cable body is sleeved with an end socket, the end socket is provided with a first through hole and a second through hole which are communicated, the diameter of the first through hole is matched with the diameter of the sheath, and the diameter of the second through hole is matched with the diameter of the sheath. The sheath is welded in the first through hole, the diameter of the second through hole is matched with the diameter of the conductor, and the conductor penetrates through the second through hole. The end socket is arranged at the end socket of the cable and is welded with the sheath and the conductor of the cable, the sealing performance is good, the mechanical strength is high, meanwhile, the end socket connected to the end socket of the cable in a sleeving mode can prevent a wire at the end of the end socket from being broken, the structural stability is good, and the cable is durable.

Description

Technical Field

[0001] This disclosure relates to the field of cable technology, and more specifically to an armored cable. Background Technology

[0002] Armored cables are made by housing conductors of different materials in a metal sheath with insulation material, and are processed into a flexible and sturdy assembly. Because of the steel tape protective layer, armored cables have high mechanical strength, strong compressive strength, corrosion resistance, and resistance to insect and rodent damage. They are mainly used for temperature measurement, signal transmission, and special heating in chemical, metallurgical, machinery manufacturing, power generation, and scientific experiments. Armored cables used in nuclear power fields, in particular, need to have good sealing performance and radiation resistance due to the special operating environment.

[0003] When wiring armored cables, the ends need to be properly insulated to prevent gaps and moisture from entering and affecting the insulation effect. This is especially important for armored cables used in nuclear power, where the ends need to have high sealing performance and radiation resistance. In the current technology, the ends of armored cables are usually encapsulated with sintered glass, which has good insulation performance, high temperature resistance, and radiation resistance. However, simply sealing the ends of armored cables with glass directly results in low strength and poor stability. They are prone to breakage during production and use, posing a safety hazard. Utility Model Content

[0004] This disclosure addresses the problems of low end cap strength and poor stability in existing armored cables by providing an armored cable with high end cap strength, good stability, and good sealing performance.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] An armored cable includes a cable body, the cable body including a conductor and a sheath wrapped around the conductor, and an end cap sleeved at the end of the cable body. The end cap is provided with a first through hole and a second through hole that are connected to each other. The diameter of the first through hole matches the diameter of the sheath. The sheath is welded into the first through hole. The diameter of the second through hole matches the diameter of the conductor. The conductor passes through the second through hole.

[0007] In some embodiments, the end cap is further provided with a third through hole, the third through hole being located on one side of the second through hole, the diameter of the third through hole being larger than the diameter of the second through hole, and a capillary tube being provided at the third through hole, the capillary tube being welded to the third through hole.

[0008] In some embodiments, the capillary is at least partially located outside the third through-hole, and the conductor passes through the capillary.

[0009] In some embodiments, the conductor is welded to the capillary.

[0010] In some embodiments, a first chamfer is provided on one side of the end face of the head on the first through hole.

[0011] In some embodiments, a second chamfer is provided on one side of the end face of the head on the third through hole.

[0012] In some embodiments, a third chamfer is provided between the first through hole and the second through hole.

[0013] In some embodiments, the second chamfer is sealed with glass.

[0014] In some embodiments, the outer periphery of the end cap has a stepped structure, wherein the outer diameter on the side closer to the conductor outlet is smaller than the outer diameter on the other side.

[0015] In some embodiments, the end cap is made of 95 ceramic material.

[0016] Compared with the prior art, the armored cable disclosed herein has a ceramic end cap at its end, which is welded to the cable sheath and conductor. It has better sealing performance and higher mechanical strength. At the same time, the end cap fitted at the cable end can also prevent the conductor at its end from breaking. It has better structural stability and is more durable. Attached Figure Description

[0017] The present disclosure will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn for the purpose of explaining the preferred embodiments only and should therefore not be construed as limiting the scope of the present disclosure. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This disclosure provides a structural schematic diagram of an armored cable;

[0019] Figure 2 This disclosure provides a schematic diagram of the end cap of an armored cable;

[0020] Figure 3 This disclosure provides a partial structural schematic diagram of an armored cable;

[0021] Among them, 1. Cable body; 11. Conductor; 12. Sheath; 2. End cap; 21. First through hole; 22. Second through hole; 23. Third through hole; 24. First chamfer; 25. Second chamfer; 26. Third chamfer; 3. Capillary tube. Detailed Implementation

[0022] The present disclosure will now be described in detail with reference to the accompanying drawings.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present disclosure and are not intended to limit the present disclosure.

[0024] Those skilled in the art should understand that, in this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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, the above terms should not be construed as limitations on this utility model.

[0025] like Figures 1 to 3 As shown, the armored cable provided in this disclosure is described in detail below:

[0026] The armored cable includes a cable body 1, which includes a conductor 11 and a sheath 12 surrounding the conductor 11. In this embodiment, the armored cable is a SiO2 cable, the conductor 11 is made of high-purity oxygen-free copper, and the sheath 12 is made of 136L stainless steel. Silicon dioxide insulation is filled between the conductor 11 and the sheath 12. The silicon dioxide is silicon dioxide powder, suitable for signal transmission in extreme environments such as nuclear power plants. The cable body 1 has extremely high environmental resistance and reliability. However, due to the special operating environment of nuclear power plants, the insulation and sealing of the cable end joints are also extremely important. Therefore, a cap 2 is fitted onto the end of the cable body 1. The cap 2 has a hollow tubular structure, and its interior has a first through hole 21 and a second through hole 22 that are connected. The end cap 2 is inserted through the cable body 1 on the same axis, so that the end cap 2 can be fitted onto the cable body 1. Specifically, the diameter of the first through hole 21 matches the diameter of the sheath 12, and the diameter of the second through hole 22 matches the diameter of the conductor 11. Therefore, the diameter of the second through hole 22 is smaller than the diameter of the first through hole 21. The end cap 2 is fitted into the cable body 1, the sheath 12 is confined within the first through hole 21, and the conductor 11 passes through the second through hole 22. There is a gap between the end cap 2 and the sheath 12. In order to seal and insulate, the edges of the sheath 12 and the first through hole 21 are vacuum welded with silver, copper, and titanium to ensure its sealing performance and suitability for use in extreme environments such as nuclear power. Moreover, the setting of the end cap 2 makes the insulation and sealing structure of the armored cable end more stable, less prone to breakage, and safer.

[0027] In this embodiment, the end cap 2 is made of 95 ceramic material, which has the characteristics of high hardness, good wear resistance, good corrosion resistance, good insulation, high temperature resistance and high mechanical strength, enabling it to be used in extreme environments such as nuclear power plants.

[0028] It should be noted that 95 ceramics are high-performance ceramics manufactured from 95% alumina micro powder through spray granulation, isostatic pressing, and high-temperature sintering processes; they are also known as 95% alumina ceramic parts.

[0029] Furthermore, to ensure a seal between the conductor 11 and the end cap 2, a third through hole 23 is provided inside the end cap 2. The third through hole 23 is located on one side of the second through hole 22, and its diameter is larger than that of the second through hole 22. A capillary tube 3 is provided at the third through hole 23. Preferably, the capillary tube 3 is made of 316L stainless steel and is located at the third through hole 23, sleeved on the outside of the conductor 11. The edges of the capillary tube 3 and the third through hole 23 are vacuum welded using silver-copper-titanium alloy, and the edges of the capillary tube 3 are welded to the conductor 11 using BNi-2 alloy. This eliminates the gap between the conductor 11 and the end cap 2, preventing moisture from entering and affecting the insulation effect. In addition, the capillary tube 3 makes the structure of the conductor 11 more stable and durable.

[0030] Understandably, 316L stainless steel is a derivative of 18-8 type austenitic stainless steel, with 2-3% added Mo. Its Mo content gives this steel excellent resistance to pitting corrosion. In addition, the L in 316L stainless steel indicates that it is a low-carbon steel with a maximum carbon content of 0.03%. It has good plasticity and toughness, as well as good weldability, making it suitable for applications where post-weld annealing is not possible and where maximum corrosion resistance is required.

[0031] It should also be noted that in this embodiment, the BNi-2 used for welding the capillary tube 3 and the conductor 11 is a nickel-based brazing filler metal, which is commonly used for brazing stainless steel. It is the preferred brazing filler metal when martensitic stainless steel, austenitic stainless steel and precipitation hardening high-temperature alloys are used as the base material. During the brazing process, its melting temperature is relatively low, and it has good wettability. The brazed joint formed has good high-temperature strength, as well as excellent oxidation resistance and corrosion resistance.

[0032] In addition, it should be noted that in this embodiment, since the end cap 2 is made of ceramic material, the commonly used ordinary brazing filler metal forms a spherical shape on the ceramic surface and has little or no wetting. Therefore, in this embodiment, the silver-copper-titanium active brazing filler metal is used for welding the capillary 3 to the third through hole 23 and for welding the sheath 12 to the first through hole 21. Because it contains titanium, an active element, it has a strong affinity for composite materials such as ceramics and can wet the ceramic surface to achieve a reliable connection between ceramics and metals.

[0033] Preferably, the capillary 3 is located at least partially outside the third through hole 23, so that the portion of the conductor 11 near the end face of the end cap 2 can be protected, preventing the conductor 11 from breaking at the end face of the end cap 2, thus making its structure stronger and more stable.

[0034] Furthermore, to facilitate welding between the sheath 12 and the end cap 2, a first chamfer 24 is provided on one side of the end face of the end cap 2 on the first through hole 21. The first chamfer 24 makes the end face of the end cap 2 form a trumpet-shaped structure, which not only makes welding more convenient, but also has a guiding function when fitting the end cap 2, making it easier to fit the end cap 2 into the cable. In addition, the setting of the first chamfer 24 makes the edge of the first through hole 21 and the sheath 12 lower than the end face of the end cap 2, that is, the weld between the first through hole 21 and the sheath 12 is located on the inner side of the end cap 2, which makes it more stable and less likely to fall off or be damaged.

[0035] Furthermore, a second chamfer 25 is provided on one side of the end face of the head 2 on the third through hole 23. The second chamfer 25 makes the other end face of the head 2 also form a trumpet-shaped structure, which plays a guiding role when installing the capillary tube 3, making the installation of the capillary tube 3 easier and also making the welding between the capillary tube 3 and the third through hole 23 more convenient. Similarly, the setting of the second chamfer 25 also makes the weld between the third through hole 23 and the capillary tube 3 lower than the end face of the head 2, so that the weld is located inside the head 2, and the structural stability is stronger. In addition, a third chamfer 26 is provided between the first through hole 21 and the second through hole 22. The third chamfer 26 is the transition between the first through hole 21 and the third through hole 23. Since the diameter of the second through hole 22 is smaller than the diameter of the first through hole 21, when installing the head 2, in order to allow the conductor 11 to easily pass through the second through hole 22, that is, the third chamfer 26 is set between the first through hole 21 and the second through hole 22, which plays a guiding role when the conductor 11 passes through.

[0036] As an improvement, to enhance its insulation and radiation resistance, the end cap 2 is sealed with glass on one side of the conductor 11 outlet end. That is, after the third through hole 23 is welded to the capillary tube 3, glass is used to seal the second chamfer 25, making it more suitable for use in nuclear power environments.

[0037] Furthermore, the outer periphery of the end cap 2 is a stepped cylindrical structure, wherein the outer diameter of the side near the conductor 11 outlet is smaller than the outer diameter of the other side, so as to facilitate its connection with electrical appliances.

[0038] Compared with existing technologies, the armored cable disclosed herein has a ceramic end cap at its end. The end cap passes through the cable and is welded to the cable for fixation. It has high sealing performance and high strength. Furthermore, the end cap fitted onto the cable end can prevent the conductor from breaking at the end. It has high structural stability and its performance meets the requirements of nuclear power, thus enabling domestic production.

[0039] The present disclosure has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present disclosure. The descriptions of the embodiments above are only for the purpose of helping to understand the present disclosure and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present disclosure without departing from the principles of the present disclosure, and these improvements and modifications also fall within the protection scope of the claims of the present disclosure.

Claims

1. An armoured cable characterised in that: The cable body (1) comprises a conductor (11) and a sheath (12) wrapped around the conductor (11), and the end of the cable body (1) is sleeved with an end cap (2), the end cap (2) is provided with a first through hole (21) and a second through hole (22) in communication, the diameter of the first through hole (21) matches the diameter of the sheath (12), the sheath (12) is welded in the first through hole (21), the diameter of the second through hole (22) matches the diameter of the conductor (11), and the conductor (11) passes through the second through hole (22).

2. An armoured cable according to claim 1, characterised in that: The end cap (2) is also provided with a third through hole (23) located on one side of the second through hole (22), the diameter of the third through hole (23) is larger than that of the second through hole (22), and a capillary tube (3) is arranged at the third through hole (23) and welded with the third through hole (23).

3. An armoured cable according to claim 2, characterised in that: The capillary tube (3) is at least partially located outside the third through hole (23), and the conductor (11) passes through the capillary tube (3).

4. An armoured cable according to claim 3, characterised in that: The conductor (11) and the capillary tube (3) are welded and fixed.

5. An armoured cable according to claim 2, characterised in that: A second chamfer (25) is arranged on one side of the end face of the end cap (2) of the third through hole (23).

6. An armoured cable according to claim 5, characterised in that: The second chamfer (25) is sealed by glass.

7. An armoured cable according to claim 1, characterised in that: A first chamfer (24) is arranged on one side of the end face of the end cap (2) of the first through hole (21).

8. An armoured cable according to claim 1, characterised in that: A third chamfer (26) is arranged between the first through hole (21) and the second through hole (22).

9. An armoured cable according to claim 1, characterised in that: The outer periphery of the end cap (2) is a stepped structure, wherein the outer diameter near the conductor (11) outlet end is smaller than the outer diameter on the other side.

10. An armoured cable according to claim 1, characterised in that: The end cap (2) is made of 95 ceramic material.

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