Pressure-resistant torsion-resistant explosion-proof cable

Abstract

The invention discloses a pressure-resistant torsion-resistant explosion-proof cable, and relates to the technical field of cables, the pressure-resistant torsion-resistant explosion-proof cable comprises a conductor, a functional layer and an outer protective layer are arranged on the outer side of the conductor, the pressure-resistant torsion-resistant explosion-proof cable further comprises an explosion-proof assembly, a buffer assembly and a cooling assembly, the explosion-proof assembly is arranged on the outer side wall of the functional layer, and the explosion-proof assembly is composed of a plurality of ribs distributed in a staggered mode; the explosion-proof assembly comprises a plurality of ribs, a pressure relief groove is formed between every two adjacent ribs, the buffering assembly comprises an inner support arranged on the outer side of the explosion-proof assembly, an outer support is arranged on the inner side of the outer protection layer, a cavity is formed by an inner concave part of the inner support and an outer convex part of the outer support, and the cooling assembly comprises a bag body arranged in the corresponding inner concave part, the corresponding outer convex part and the cavity. Through the arrangement of the ribs distributed in a staggered manner, the cooling assembly and the buffer assembly, the problems that the cable is poor in anti-pressure capability in the use process and cannot play an anti-explosion role after the interior of the cable is broken down are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a pressure-resistant, torsion-resistant, and explosion-proof cable. Background Art

[0002] Cables are commonly used devices for transmitting electrical energy, consisting of conductors wrapped in insulation layers and shielding layers, and outer protective components. Depending on the different usage environments of the cables, the production methods of the cables are also different. For example, when using cables to electrically connect devices, the cables may be crushed as the devices move. Because the cables are twisted together to form a rigid whole, after being crushed multiple times, it is easy for the cables to become loose and deformed internally, resulting in slow heat dissipation. The cable's power transmission performance is easily weakened, and heat accumulates rapidly at the deformed position, causing the cable to catch fire.

[0003] When cables are used in chemical, petroleum, natural gas, mining and other explosion-hazardous areas, general cable cooling can keep the conductors cool and prevent the cables from catching fire due to excessive temperatures. However, when the cables work for a long time, the internal insulation layer will age, making it easy for the conductor to break through and cause an explosion. Therefore, it is necessary to produce cables with explosion-proof capabilities to avoid cable explosions.

[0004] It was found in actual use that the cables are easily twisted and stretched due to the constant movement between devices, which causes the cables to be constantly stretched and twisted, thereby causing damage to the inside of the cables and reducing the actual service life of the cables. Summary of the Invention

[0005] The object of the present invention is to provide a pressure-resistant, torsion-resistant explosion-proof cable to solve the technical problems in the above background technology that the cable has poor pressure resistance during use and cannot play an explosion-proof role after being internally punctured.

[0006] To achieve the above object, the present invention provides the following technical solution: a pressure-resistant, torsion-resistant, explosion-proof cable, comprising a conductor, wherein a functional layer and an outer sheath are provided on the outer side of the conductor, and further comprising: An explosion-proof assembly, comprising an explosion-proof net formed of a plurality of staggered ribs arranged on the outer side wall of the functional layer, with pressure relief grooves formed between adjacent ribs; A buffer assembly, the buffer assembly comprising an inner support disposed on the outside of the rib, an outer support disposed on the inside of the outer protective layer, the inner support and the outer support each comprising a plurality of outer protrusions and inner recesses, the inner recesses of the inner support and the outer protrusions of the outer support forming a cavity; The cooling component includes a capsule arranged in the corresponding inner concave part, outer convex part and cavity, and each capsule is filled with a cooling material.

[0007] Preferably, the explosion-proof component is provided with a plurality of pressure-guiding grooves connected to the pressure relief grooves, the pressure relief grooves are filled with expansion material, and the plurality of ribs are fixedly connected to the outer wall of the functional layer.

[0008] Preferably, the explosion-proof assembly further comprises a plurality of energy-absorbing members arranged between the capsule and the corresponding inner concave portion, outer convex portion and cavity, and the energy-absorbing members are provided with a plurality of micropores.

[0009] Preferably, the outer wall of the outer convex portion of the inner support is fixedly connected to the inner concave portion of the outer support.

[0010] Preferably, each of the capsules located in the cavity is connected to the adjacent capsules via a connecting tube, and the capsules located in the inner support are connected to the capsules located in the outer support via a connecting tube.

[0011] Preferably, a plurality of avoidance grooves for avoiding the communicating pipes and the connecting pipes are provided on the inner support and the outer support.

[0012] Preferably, the functional layer includes an insulating layer provided on the outer wall of the conductor, and a shielding layer is provided on the outer wall of the insulating layer.

[0013] Preferably, the outer protective layer includes a protective layer, and the outer wall of the protective layer is provided with an armor layer.

[0014] Preferably, the capsule located in the inner recess on the outer support is fixedly connected to the inner wall of the protective layer.

[0015] Preferably, the capsule located in the outer protrusion on the inner support is fixedly connected to the rib.

[0016] The beneficial effects of the present invention are: 1. By setting the outer convex part and inner concave part of the external support and the internal support, multi-level buffering of the extrusion force is achieved, and then the extrusion force is buffered again by the capsules in the outer convex part and the inner concave part and the capsule in the cavity, thereby achieving a good anti-extrusion effect and avoiding the problem of reduced transmission efficiency due to deformation of the internal conductor. After the multiple capsules are interconnected, the cooling material moves continuously in different capsules to solve the problem of heat accumulation. Through the pressure relief grooves, pressure guiding grooves, energy absorbing parts and micropores, the instantaneous impact energy can be unloaded and diverted when the shielding layer and the insulation layer are penetrated, preventing the instantaneous impact from being too large and causing the cable to be completely penetrated, and then the pressure is relieved step by step through the capsules, internal supports, etc., thereby reducing the impact energy from damaging the protective layer of the cable, preventing the cable from being completely penetrated, making the cable have integrity, and enhancing the protection of the cable.

[0017] 2. By movably setting the sac inside the inner support and the outer support, when the cable is twisted, the sac moves relatively in the corresponding inner support and outer support, thereby achieving the anti-torsion effect of the cable, and when the cable is stretched, the inner support and the outer support are deformed, thereby achieving separate stretching between the internal functional layer and the outer sheath of the cable, and the buffering of the sac and the cooling material enhances the anti-stretching effect of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0020] Figure 3 Schematic diagram of the structural distribution of the inner support and outer support of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the rib of the present invention.

[0022] Figure 5 This is a cross-sectional view of the structure of the capsule in the cavity of the present invention.

[0023] Figure 6 Schematic diagram of the explosion of the energy absorbing member of the present invention.

[0024] Figure 7 Schematic diagram of the distribution of the bladder and energy absorbing member of the present invention.

[0025] The figures are marked as follows: 1. conductor; 2. functional layer; 201. insulating layer; 202. shielding layer; 3. outer protective layer; 301. protective layer; 302. armor layer; 4. explosion-proof component; 401. rib; 402. pressure relief groove; 403. pressure guiding groove; 404. energy absorbing part; 405. expansion material; 5. buffer component; 501. inner support; 502. outer support; 503. outer convex part; 504. inner concave part; 505. cavity; 506. avoidance groove; 6. cooling component; 601. bladder; 602. cooling material; 603. connecting pipe; 604. connecting pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0027] Example 1 A cable is commonly a device for transmitting electrical energy, which is composed of an insulating layer 201, a shielding layer 202, an outer protective component and a conductor 1. Depending on the different use environments of the cable, the production method of the cable is also different. For example, when using the cable to electrically connect devices, the cable may be crushed as the device moves. Because the cables are twisted together to form a rigid whole, after being crushed many times, it is easy to cause the inside of the cable to become loose and deformed, which can easily lead to slow heat dissipation, and the cable's power transmission performance may be weakened, and heat may accumulate rapidly at the deformed position, causing the cable to catch fire.

[0028] To solve the above technical problems, please refer to Figures 1 to 7 As shown, a pressure-resistant, torsion-resistant, explosion-proof cable according to an embodiment of the present invention includes a pressure-resistant, torsion-resistant, explosion-proof cable, including a conductor 1, a functional layer 2 and an outer sheath 3 are provided on the outside of the conductor 1, and a buffer component 5 and a cooling component 6. The buffer component 5 includes an inner support 501 provided between the functional layer 2 and the outer sheath 3, an outer support 502 is provided on the inner side of the outer sheath 3, and the inner support 501 and the outer support 502 are both composed of a plurality of outer protrusions 503 and inner recesses 504. The outer protrusions 503 and the inner recesses 504 on the inner support 501 and the outer support 502 are all staggered. The inner recess 504 of the inner support 501 and the outer protrusion 503 of the outer support 502 form a cavity 505. The cooling component 6 includes a plurality of outer protrusions 503 and an inner recess 504 provided on the inner support 501 and the outer support 502. The inner concave portion 504 and the outer convex portion 503 and the capsule 601 in the cavity 505, each capsule 601 is filled with a cooling material 602, the outer wall of the outer convex portion 503 of the inner support 501 is fixedly connected to the inner concave portion 504 of the outer support 502, each capsule 601 located in the cavity 505 is connected to the adjacent capsule 601 through a connecting tube 603, the capsule 601 located in the inner support 501 is connected to the capsule 601 located in the outer support 502 through a connecting tube 604, the functional layer 2 includes an insulating layer 201 arranged on the outer wall of the conductor 1, the outer wall of the insulating layer 201 is provided with a shielding layer 202, the outer sheath 3 includes a protective layer 301, and the outer wall of the protective layer 301 is provided with an armor layer 302.

[0029] During use, when the cable is squeezed, the squeezing force relieves part of the pressure through the armor layer 302, and then the squeezing force is transmitted to the inside of the cable through the protective layer 301. The squeezing force on the protective layer 301 is released into the capsule 601 within the outer support 502 and the inner recess 504 on the outer support 502. Since the capsule 601 is filled with cooling material 602, and the cooling material 602 has a certain fluidity, it can provide a certain buffering effect.

[0030] Then the extrusion pressure is squeezed onto the inner support 501 through the outer support 502, and the force on the inner support 501 is then transmitted to the capsule 601 in the outer protrusion 503 on the inner support 501. When the extrusion pressure is released into the cavity 505, it can be transmitted to the capsule 601 therein through the cavity 505, and buffered by the cooling material 602 in the capsule 601. At the same time, the cooling material 602 in the capsule 601 can be squeezed into the adjacent capsule 601 after being compressed through the connecting tube 603 and the connecting tube 604, preventing the capsule 601 from being damaged due to excessive squeezing, thereby achieving good pressure resistance, preventing the shielding layer 202 and the insulating layer 201 and the conductor 1 inside the cable from being directly deformed after being squeezed, resulting in reduced transmission efficiency and slow heat dissipation after internal deformation.

[0031] At the same time, the conductor 1 will gradually heat up after working. The heat is absorbed by the inner support 501 and the capsule 601 close to the conductor 1, so that the cooling material 602 absorbs the heat around the conductor 1. The absorbed heat causes the cooling material 602 to expand to a certain extent, so that the cooling material 602 in the capsule 601 is discharged into a part of the capsule 601 in the adjacent cavity 505 through the connecting pipe 603. At the same time, the connecting pipe 603 has a strong thermal conductivity, so that the heat is transferred to the adjacent capsule 601, so that the cavity 505 The cooling material 602 of the capsule 601 quickly absorbs heat and introduces the heat and the expanded cooling material 602 into the capsule 601 adjacent to and away from the conductor 1, so that the cooling material 602 in the inner recess 504 on the outer support 502 absorbs heat and heats up and expands, and the cooling material 602 inside is discharged into the capsule 601 in the outer protrusion 503 on the connected inner support 501 through the connecting tube 604, thereby achieving cooling of the conductor 1 and completing the continuous exchange of the cooling material 602, thereby achieving rapid cooling of the conductor 1.

[0032] When the local temperature is high, the cooling material 602 is continuously exchanged in different capsules 601, so that the conductor 1 can be cooled locally quickly and stably, so that the temperature of the conductor 1 will never be too high, and the heat is transferred to a position far away from the conductor 1. Finally, the cooling material 602 in the capsule 601 far away from the conductor 1 slowly dissipates to the outside through the protective layer 301 and the armor layer 302.

[0033] Multi-level buffering of the extrusion force is achieved through the outer support 502 and the outer convex part 503 and the inner concave part 504 of the inner support 501. The extrusion force is further buffered through the capsule 601 in the outer convex part 503 and the inner concave part 504 and the capsule 601 in the cavity 505, thereby achieving a good anti-extrusion effect and avoiding the problem of reduced transmission efficiency due to deformation of the internal conductor 1. After the multiple capsules 601 are interconnected, the cooling material 602 moves continuously in different capsules 601 to solve the problem of heat accumulation.

[0034] Example 2 In actual use, it is found that when the cable is used in chemical, petroleum, natural gas, mining and other explosion-hazardous areas, although the above content can achieve the effect of cooling the cable and preventing the cable from catching fire due to excessive temperature, when the cable works for a long time, it will cause aging of the internal insulation layer 201, etc., making it easy for the conductor 1 to break through and cause an explosion hazard. Therefore, it is necessary to produce cables with explosion-proof capabilities to avoid cable explosions.

[0035] To solve the above technical problems, please refer to Figures 1 to 7 As shown, the adopted technical solution includes an explosion-proof component 4, which includes an explosion-proof net composed of a plurality of staggered ribs 401 arranged on the outer wall of the functional layer 2, and a pressure relief groove 402 is formed between adjacent ribs 401. A plurality of pressure-guiding grooves 403 connected to the pressure relief groove 402 are opened on the explosion-proof net, and the pressure relief groove 402 is filled with an expansion material 405 (the expansion material 405 can be selected as an expanded graphite-ceramic silicone composite material, which has good heat dissipation, heat conduction and fire extinguishing effects). The plurality of ribs 401 are fixedly connected to the outer wall of the functional layer 2. The explosion-proof component 4 also includes a plurality of energy-absorbing parts 404 arranged between the capsule 601 and the corresponding inner concave portion 504 and the outer convex portion 503 and the cavity 505. The energy-absorbing part 404 is provided with a plurality of micropores, which are not shown in the figure.

[0036] Based on the above embodiment, during use, when the temperature of the conductor 1 rises, the heat is quickly conducted to the nearby capsule 601 through the expanded graphite-ceramic silicone composite material, thereby ensuring that the heat is quickly transferred to the outside, further improving the overall heat dissipation performance of the cable, and delaying the aging rate of the shielding layer 202 and the insulating layer 201.

[0037] At the same time, when the conductor 1 instantly penetrates the shielding layer 202 and the insulating layer 201, the expanded graphite-ceramic silicone composite material in the pressure relief groove 402 absorbs heat and expands, squeezing the inner support 501 and the capsule 601 close to the conductor 1 and the conductor 1, filling the penetrated position, preventing the shielding layer 202 and the insulating layer 201 from further burning, causing the crack to become larger, and performing flame retardancy. At the same time, pressure is relieved through the pressure guiding groove 403, so that the impact energy rushes through the adjacent pressure relief groove 402 and the pressure guiding groove 403 and is transmitted to the adjacent area, realizing primary unloading of energy. At the same time, secondary pressure relief and buffering are performed through the energy absorbing member 404 and the micropores on the energy absorbing member 404, realizing partial unloading and pressure guiding of the impact energy, avoiding excessive local pressure, which causes the cable to be completely penetrated, and ensuring the internal integrity of the cable.

[0038] When the shielding layer 202 and the insulating layer 201 are penetrated, since multiple pressure relief grooves 402 are formed between the ribs 401, the impact energy can be instantly introduced into the pressure relief grooves 402, and then the impact energy is transmitted to the inner support 501 and the capsule 601, and then gradually transmitted to the outside, and the impact energy is unloaded step by step, thereby realizing step-by-step buffering of instantaneous energy. The path is the ribs 401, the pressure relief grooves 402 and the pressure guiding grooves 403, the capsule 601 and the inner support 501, the cavity 505, the capsule 601, and the outer support 502, thereby preventing the cable from being penetrated from the inside to the outside and preventing explosion.

[0039] At the same time, when the inner bladder 601 is punctured, the cooling material 602 can flow out of the bladder 601, quickly cooling the fire point and the punctured position, absorbing a large amount of heat energy, reducing the heat energy of the impact energy, and playing a certain pressure relief role. When the outer bladder 601 is burned through or squeezed, the cooling material 602 in the bladder 601 can cover the fire point and play a certain fire extinguishing role. At the same time, after the cooling material 602 comes into contact with the outside air and water vapor, it can gradually solidify, thereby preventing further leakage of the cooling material 602, and playing a slight sealing role on the rupture, maintaining the integrity of the outside of the cable.

[0040] By setting the pressure relief groove 402, the pressure guiding groove 403, the energy absorbing part 404 and the micropores, the instantaneous impact energy can be unloaded and diverted when the shielding layer 202 and the insulating layer 201 are penetrated, preventing the instantaneous impact from being too large and causing the cable to be completely penetrated, and then gradually releasing the pressure through the sac 601, the internal support 501, etc., thereby reducing the impact energy from damaging the protective layer 301 of the cable, preventing the cable from being completely penetrated, and enhancing the protection of the cable.

[0041] Example 3 During actual use, it was found that although the above embodiments solved the flame retardant and explosion-proof problems in the actual use of cables, during actual use of the cables, due to the constant movement between devices, the cables are easily twisted and stretched, resulting in the cables being continuously stretched and twisted, which in turn causes damage to the inside of the cables and reduces the actual service life of the cables.

[0042] To solve the above technical problems, please refer to Figures 1 to 7 As shown, the adopted technical solution includes an inner support 501, and a plurality of avoidance grooves 506 for avoiding the connecting pipe 603 and the connecting pipe 604 are provided on the inner support 501 and the outer support 502. The capsule 601 located in the inner recess 504 on the outer support 502 is fixedly connected to the inner wall of the protective layer 301, and the capsule 601 located in the outer protrusion 503 on the inner support 501 is fixedly connected to the rib 401. It can also be selected that the inner recess 504 of the inner support 501 is fixedly connected to the rib 401.

[0043] During use, when the cable is subjected to tensile force, the tensile force acts on the armor layer 302 of the cable, so that the armor layer 302 pulls the outer support 502 through the protective layer 301. Since the outer support 502 and the inner support 501 are both processed into a wavy shape, when they are stretched, the inner support 501 and the outer support 502 are both stretched and deformed, so that the height of the inner support 501 and the outer support 502 changes, thereby resisting the effect of the tensile force. At the same time, the sac 601 and the cooling material 602 provided can resist part of the tensile force, and when the inner support 501 and the outer support 502 are stretched by the tensile force, the inner support 501 and the outer support 502 are deformed and squeeze the sac 601, thereby causing the cooling material 602 to flow, so that the sac 601 and the cooling material 602 offset part of the tensile force again.

[0044] When the cable is subjected to torsional force, the armor layer 302 drives the fixed capsule 601 to slide in the outer support 502 through the protective layer 301. At the same time, the cooling material 602 and the capsule 601 can provide a certain buffering force, which is opposite to the direction of the torsional force, thereby achieving the primary anti-twist effect. At the same time, since the inner support 501 and the outer support 502 are provided with an avoidance groove 506 for avoiding the connecting pipe 604 and the connecting pipe 603, the capsule 601 can move relative to the inner support 501 and the outer support 502. During rotation, the connecting tube 604 and the communicating tube 603 will not be squeezed and disconnected. When the torsional force is strong, the inner support 501 and the outer support 502 are twisted synchronously, and the capsule 601 close to the conductor 1 side moves relative to the inner support 501, thereby realizing the anti-torsion function of the cable and enhancing the anti-torsion effect of the cable. At the same time, the inner support 501 and the outer support 502 are made of materials with good mechanical properties, and can still have good mechanical properties such as support and pressure resistance when the avoidance groove 506 is opened.

[0045] By movably setting the sac 601 in the inner support 501 and the outer support 502, when the cable is twisted, the sac 601 moves relatively in the corresponding inner support 501 and outer support 502, thereby achieving the anti-torsion effect of the cable, and when the cable is stretched, the inner support 501 and the outer support 502 are deformed, thereby achieving separate stretching between the internal functional layer 2 and the outer sheath 3 of the cable, and the buffering of the sac 601 and the cooling material 602 enhances the anti-stretching effect of the cable.

[0046] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A pressure-resistant, torsion-resistant, explosion-proof cable, comprising a conductor, wherein a functional layer and an outer sheath are provided on the outer side of the conductor, characterized in that: Also includes: An explosion-proof assembly, comprising an explosion-proof net formed of a plurality of staggered ribs arranged on the outer side wall of the functional layer, with pressure relief grooves formed between adjacent ribs; A buffer assembly, the buffer assembly comprising an inner support disposed on the outside of the rib, an outer support disposed on the inside of the outer protective layer, the inner support and the outer support each comprising a plurality of outer protrusions and inner recesses, the inner recesses of the inner support and the outer protrusions of the outer support forming a cavity; The cooling component includes a capsule arranged in the corresponding inner concave part, outer convex part and cavity, and each capsule is filled with a cooling material.

2. The pressure-resistant, torsion-resistant, explosion-proof cable according to claim 1, characterized in that: The explosion-proof net is provided with a plurality of pressure-guiding grooves connected to the pressure-relief grooves. The pressure-relief grooves are filled with expansion materials. The plurality of ribs are fixedly connected to the outer wall of the functional layer.

3. The pressure-resistant, torsion-resistant, explosion-proof cable according to claim 1, characterized in that: The explosion-proof assembly further comprises a plurality of energy-absorbing members arranged between the capsule body and the corresponding inner concave portion, outer convex portion and cavity, and a plurality of micropores are formed on the energy-absorbing members.

4. The pressure-resistant, torsion-resistant, explosion-proof cable according to claim 1, characterized in that: The outer wall of the outer convex portion of the inner support is fixedly connected to the inner concave portion of the outer support.

5. The pressure-resistant, torsion-resistant, explosion-proof cable according to claim 1, characterized in that: Each of the capsules located in the cavity is communicated with the adjacent capsules through a communicating tube, and the capsules located in the inner support are communicated with the capsules located in the outer support through a connecting tube.

6. The pressure-resistant, torsion-resistant, explosion-proof cable according to claim 1, characterized in that: A plurality of avoidance grooves are provided on the inner support and the outer support.

7. The pressure-resistant, torsion-resistant, explosion-proof cable according to claim 1, characterized in that: The functional layer includes an insulating layer arranged on the outer wall of the conductor, and a shielding layer is arranged on the outer wall of the insulating layer.

8. The pressure-resistant, torsion-resistant, explosion-proof cable according to claim 7, characterized in that: The outer protective layer includes a protective layer, and the outer wall of the protective layer is provided with an armor layer.

9. The pressure-resistant, torsion-resistant, explosion-proof cable according to claim 1, characterized in that: The capsule located in the inner recess on the outer support is fixedly connected to the inner wall of the protective layer.

10. The pressure-resistant, torsion-resistant, explosion-proof cable according to claim 1, characterized in that: The capsule located in the outer protrusion on the inner support is fixedly connected to the rib.

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