High and low temperature resistant signal cable

Abstract

The invention discloses a high and low temperature resistant signal cable, and belongs to the technical field of high and low temperature resistant signal cables, and the cable comprises a cable kit, the cable kit is installed in a sectional manner, a kit bonding layer is installed at the joint of the cable kit, a multifunctional composite protection layer is installed in the cable kit in an attached manner, and the multifunctional composite protection layer is sleeved with the cable kit. A cable core is installed in the multifunctional composite sheath, and the surface of the multifunctional composite sheath is sleeved with a sleeve type sliding sheath. Through the arrangement of the multi-layer nested structure, the internal structure of the cable can realize automatic adjustment of thermal expansion and cold contraction and stress release in a high-low temperature repeated change process, so that the problem that a cable core is easy to lose efficacy due to expansion extrusion or shrinkage displacement is solved; and by arranging the limiting traction piece and the elastic reset piece, automatic reset of the structure after thermal deformation is achieved, and the use stability of the cable structure in the long-term operation process is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of high and low temperature resistant signal cables, and more specifically, it relates to a high and low temperature resistant signal cable. Background Art

[0002] Currently, in application scenarios with extremely high environmental adaptability requirements such as aerospace, oil exploration, polar communication, and tunnel automation, signal cables are constantly facing various problems such as frequent alternation of high and low temperatures and accumulation of thermal stress;

[0003] Traditional cables generally adopt a fixed layer coating method or a continuous type limiting structure. Although they can provide basic mechanical protection, in actual complex environments, they are often prone to structural fatigue due to uneven deformation caused by thermal expansion and contraction, which in turn leads to related problems such as interlayer peeling, core offset, and even breakdown failure, seriously affecting the service life of the cable and the stability of signal transmission;

[0004] In response to the above problems, in the existing technologies on the current market, most adopt bonding or rigid biting methods. The cable lacks the ability of flexible response adjustment, which not only results in a large slip resistance and easy jamming, but also is prone to fatigue rupture under long-term thermo-mechanical alternating loads due to excessive structural rigidity, thus unable to effectively ensure the use stability of the cable core;

[0005] Moreover, the internal conductor structure is also prone to inconsistent local expansion and contraction due to uneven thermal stress, which is also likely to cause related problems such as structural instability and interface delamination;

[0006] Therefore, in order to solve the above problems, we have designed a high and low temperature resistant signal cable. Summary of the Invention

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A high and low temperature resistant signal cable, comprising: a cable kit, the cable kit is installed in a segmented manner, a kit bonding layer is installed at the abutting portion of the two cable kits, an outer sleeve is fitted and installed inside the cable kit, the two cable kits are abutted and bonded through the bonding layer, a multi-functional composite protective layer is sleeved inside the outer sleeve, a cable core is installed inside the multi-functional composite protective layer, a sleeve-type sliding sheath is sleeved on the surface of the multi-functional composite protective layer, the sleeve-type sliding sheath is installed at intervals on the surface of the multi-functional composite protective layer, and the sleeve-type sliding sheath overlaps with the inner wall of the outer sleeve;

[0009] Further, the cable cores are installed in a multi-group spiral connection. A filler is filled in the gap between two adjacent cable cores. The filler is filled inside the multi-functional composite sheath. Bubble holes are formed inside the filler. A limiting and pulling member is arranged inside the filler. Both ends of the limiting and pulling member are respectively lapped on the surfaces of two adjacent cable cores.

[0010] Further, grooves are formed on the surface of the multi-functional composite sheath, and bumps are formed on the inner wall of the sleeve-type sliding sheath. The bumps are matched with the grooves.

[0011] A low-friction coating is applied to the contact and sliding surface between the multi-functional composite sheath and the sleeve-type sliding sheath. The coating is selected from one of polytetrafluoroethylene, molybdenum disulfide or graphite coating, and is used to reduce the friction generated by relative movement during the process of thermal expansion and contraction.

[0012] When the multi-functional composite sheath deforms, the sleeve-type sliding sheath can realize axial micro-displacement sliding compensation along the bumps and the grooves to maintain the stability of the overall cable structure.

[0013] Further, the multi-functional composite sheath is a thermal-responsive multi-functional composite sheath structure, including:

[0014] A high-insulation inner layer in direct contact with the cable core. The material of the high-insulation inner layer is selected from polyether ether ketone or perfluoroalkoxy ethylene.

[0015] A flexible elastic intermediate layer for thermal expansion compensation. The material of the flexible elastic intermediate layer contains a composite of thermoplastic elastomer and inorganic particles.

[0016] A low-friction sliding outer layer with a polytetrafluoroethylene or molybdenum disulfide coating on the outer surface.

[0017] The low-friction sliding outer layer, the high-insulation inner layer and the flexible elastic intermediate layer are thermally responsive and slidingly matched. Under the temperature change conditions of -60°C to +250°C experienced by the cable, they can still maintain the structural protection of the conductor core and the function of compensating for thermal expansion and contraction stress.

[0018] Further, the sleeve-type sliding sheath is arranged in a sleeve-type structure, including:

[0019] A main body layer formed by blending and modifying thermoplastic elastomer and engineering plastic nylon and incorporating ceramic microbeads or hollow glass microspheres.

[0020] An inner contact layer and an outer contact layer made of the same material as the low-friction sliding outer layer.

[0021] Furthermore, an elastic resetting member is installed through the inside of the sleeve-type sliding sheath. The elastic resetting member is used to pull the two sleeve-type sliding sheaths for resetting. The sleeve-type sliding sheaths are installed in a spaced arrangement, and the sleeve-type sliding sheaths at both ends are fixedly arranged. The elastic resetting member includes:

[0022] An elastic inner core layer, made of high-rebound silicone rubber filaments, with elastic recovery ability and aging resistance within the range of -60°C to +250°C;

[0023] A functional composite coating layer, including:

[0024] A polyimide film coating layer, coated on the outside of the elastic inner core layer, for improving high-temperature stability and structural flexibility;

[0025] An outer fiber reinforcement layer, coated on the outside of the polyimide film coating, composed of aramid fibers, for enhancing the overall tensile strength of the structure and improving the resetting accuracy;

[0026] A coated polytetrafluoroethylene microfilm layer, coated on the surface of the outer fiber reinforcement layer, for forming a low-friction surface.

[0027] Furthermore, friction support blocks are arranged on the surface and inner wall of the sleeve-type sliding sheath. The friction support blocks are used to further reduce the moving friction of the sleeve-type sliding sheath.

[0028] Furthermore, the filling member is an elastic foam composite containing phase change material microparticles;

[0029] The phase change material is self-phase change paraffin, fatty acid or inorganic phase change material microcapsules;

[0030] The elastic foam composite is composed of phase change materials embedded in a silicone foam matrix;

[0031] The microparticles are embedded in the elastic foam composite to form a porous energy-absorbing structure;

[0032] The limit pulling members are installed in an intermittent arrangement, and the limit pulling members are made of polyether ether ketone, polyphenylene sulfide or epoxy glass fiber reinforced composite plastic materials.

[0033] In summary, the present invention has the following beneficial effects:

[0034] By setting the multi-layer nested structure, the internal structure of the cable can realize automatic adjustment of thermal expansion and contraction and stress release during the repeated change of high and low temperatures, thus solving the problem that the cable core is easily damaged due to expansion extrusion or shrinkage displacement;

[0035] By setting the limit pulling member and the elastic reset member, the automatic reset of the structure after thermal deformation is realized, ensuring the use stability of the cable structure during long-term operation;

[0036] By calculating the installation spacing of the limit pulling member, the problem that traditional limiters are prone to over-sparse or over-dense layout during the layout density process is avoided, thereby improving the adaptability of the cable interior to non-linear deformation;

[0037] By the combined use of the multi-functional composite sheath and the sleeve-type sliding sheath, the overall dynamic deformation adaptability of the cable is improved. Brief Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0039] Figure 1 It is a schematic structural view of the whole cable of the present invention after being cut at the cable kit connection;

[0040] Figure 2 It is a partial cross-sectional structural view of the multi-functional composite sheath and the cable core of the present invention;

[0041] Figure 3 For the present invention Figure 2 It is an enlarged structural view at A in;

[0042] Figure 4 It is a schematic structural view of the socket connection of the multi-functional composite sheath and the sleeve-type sliding sheath of the present invention;

[0043] Figure 5 It is a schematic cross-sectional view of the connection of the elastic reset member and the sleeve-type sliding sheath of the present invention;

[0044] Figure 6 It is a partial structural view of the friction support block on the surface of the sleeve-type sliding sheath of the present invention;

[0045] Figure 7 It is a schematic structural view of the responsive multi-functional composite sheath of the present invention;

[0046] Figure 8 It is a schematic illustration of the sleeve-type structure of the sleeve-type sliding sheath of the present invention;

[0047] Figure 9 It is a schematic diagram of the material composition of the elastic reset member of the present invention;

[0048] Figure 10 Schematic diagram of the overall composition of the cable of the present invention.

[0049] In the figure:

[0050] 1. Cable kit; 2. Kit bonding layer; 3. Outer sleeve; 4. Multifunctional composite sheath; 5. Sleeve-type sliding sheath; 6. Cable core; 7. Filler; 8. Bubble holes; 9. Limit traction member; 10. Elastic reset member; 11. Friction support block. Specific embodiments

[0051] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] Embodiment:

[0053] The following is a further detailed description of the present invention with reference to the attached Figures 1-6 drawings.

[0054] Please refer to Figures 1-6 , the present invention provides a technical solution: a high and low temperature resistant signal cable, as Figures 1-6 shown, including: a cable kit 1, the cable kit 1 is installed in a segmented manner, a kit bonding layer 2 is installed at the abutting portion of the two cable kits 1, an outer sleeve 3 is internally fitted to the cable kit 1, a multifunctional composite sheath 4 is sleeved inside the outer sleeve 3, a cable core 6 is installed inside the multifunctional composite sheath 4, a sleeve-type sliding sheath 5 is sleeved on the surface of the multifunctional composite sheath 4, the sleeve-type sliding sheath 5 is installed at intervals on the surface of the multifunctional composite sheath 4, the inner walls of the sleeve-type sliding sheath 5 and the outer sleeve 3 overlap, and the two cable kits 1 are adhesively bonded through the bonding layer 2;

[0055] In this embodiment, through the mutual cooperation among multiple nested structures such as the cable kit 1, the outer sleeve 3, the multi-functional composite sheath 4, and the sleeve-type sliding sheath 5, the dynamic adjustment and structural protection functions of the cable in a high and low temperature changing environment are realized. Specifically, the cable core 6 is placed inside the multi-functional composite sheath 4 as the transmission medium, and the multi-functional composite sheath 4 provides a directional coating and protection effect. The sleeve-type sliding sheath 5 is arranged outside the multi-functional composite sheath 4. Through the sliding pair cooperation relationship formed between the sleeve-type sliding sheath 5 and the multi-functional composite sheath 4, when the temperature rises or falls, causing the multi-functional composite sheath 4 to expand or contract, the multi-functional composite sheath 4 can have axial or radial micro-displacements on the inner wall of the sleeve-type sliding sheath 5, releasing the internal stress of the structure caused by thermal changes, thereby preventing the multi-functional composite sheath 4 from being overly deformed and squeezing the cable core 6, resulting in damage to the cable core 6;

[0056] In addition, the body of the sleeve-type sliding sheath 5 is coated inside the outer sleeve 3, and 3 is an outer wrapping structural layer, which is firmly connected to the cable kit 1 through the kit adhesive layer 2; when the temperature changes cause different coefficients of thermal expansion in the multi-layer structure, the adhesion of the kit adhesive layer 2 can prevent interlayer dislocation and ensure the overall consistency of the outer sleeve 3 and the cable kit 1. Moreover, the multi-segment adhesive splicing setting of the kit adhesive layer 2 also facilitates the cutting of the whole cable;

[0057] Furthermore, in order to suppress the problem of structural drift caused by thermal expansion and contraction, a filler 7 is filled between multiple cable cores 6. The filler 7 has flexible buffering and heat absorption capabilities. When the external temperature changes violently, the filler 7 can maintain the position stability of the cable core 6 in space. At the same time, through the internally embedded bubble holes 8, a porous buffering structure is formed to enhance the stress release ability, so as to ensure that when the temperature is too high, the expansion inside the cable will not cause local accumulation problems, resulting in a decrease in the overall service life of the cable;

[0058] To prevent the cable core 6 from being misaligned axially or radially during environmental changes, a limiting and pulling member 9 is embedded inside the filler 7. It can be seen that the limiting and pulling member 9 is arranged in an intermittent manner and forms a mechanical limiting relationship with multiple cable cores 6. When the cable core 6 has a tendency of thermal expansion due to temperature rise, its displacement limit is restricted; after the temperature drops, since the elastic reset member 10 passes through between the two sleeve-type sliding sheaths 5 and provides a pulling tension, it can make the sleeve-type sliding sheath 5 relatively return to the initial symmetric state, thereby driving the multi-functional composite sheath 4 and the internal structure as a whole to return to their positions, completing the overall sliding and reset process. In this way, while ensuring the overall protection of the cable, it will not cause irreversible cracking damage to the inside of the cable due to thermal expansion;

[0059] During multiple thermal cycles, to avoid high frictional losses and resulting wear failure between the multi-functional composite sheath 4 and the sleeve-type sliding sheath 5 during the sliding process, a plurality of friction support blocks 11 are arranged on both the inner wall and the outer surface of the sleeve-type sliding sheath 5. By constructing sliding fulcrums, the friction support blocks 11 reduce the direct frictional contact area between the multi-functional composite sheath 4 and the sleeve-type sliding sheath 5, and at the same time provide a guiding function to ensure the stable trajectory of the multi-functional composite sheath 4 during multiple sliding processes;

[0060] Through the setting of the above structure, the stability, reusability and service life of the overall cable structure are effectively improved.

[0061] As Figures 1-6 shown, the cable core 6 is installed by means of multiple groups of spiral connections. A filler 7 is filled in the gap between two cable cores 6. The filler 7 is filled inside the multi-functional composite sheath 4. Bubble holes 8 are formed inside the filler 7. A limiting and pulling member 9 is arranged inside the filler 7. Both ends of the limiting and pulling member 9 are respectively lapped on the surfaces of two adjacent cable cores 6.

[0062] In this embodiment: By processing the sleeve-type sliding sheath 5 into an annular shell with an inner sliding groove structure, a slidable mating relationship is maintained between it and the multi-functional composite sheath 4. At low temperatures, when the material of the multi-functional composite sheath 4 undergoes micro-shrinkage and relative displacement occurs, the sleeve-type sliding sheath 5 can allow the multi-functional composite sheath 4 to retract axially through its internal cavity. When the temperature rises and causes the multi-functional composite sheath 4 to expand, it can radially adaptively extend along the sleeve-type sliding sheath 5, so as to ensure that the cable core 6 is in a non-compressed state under any temperature change. The filler 7 is formed by pouring an elastic energy-absorbing material, and a number of bubble holes 8 are contained inside it, so that the entire filler 7 area has a buffer gap. During the operation of this structure, it can not only absorb heat energy and achieve structural rebound, but also prevent the cable core 6 from being disturbed due to instability during the alternation of high and low temperatures to ensure the use safety of the cable core 6. Moreover, when the cable core 6 deforms due to heat, the limiting and pulling member 9 can conduct limited guidance on it through an elastic sliding groove to prevent it from generating excessive displacement.

[0063] As Figures 1-6 shown, grooves are formed on the surface of the multi-functional composite sheath 4, and protrusions are formed on the inner wall of the sleeve-type sliding sheath 5, and the protrusions match the grooves;

[0064] A low-friction coating is applied to the contact sliding surface between the multi-functional composite sheath 4 and the sleeve-type sliding sheath 5. The coating is selected from one of polytetrafluoroethylene, molybdenum disulfide or graphite coatings, and is used to reduce the frictional force generated by relative movement during the process of thermal expansion and contraction;

[0065] The sleeve - type sliding sheath 5 can achieve axial micro - displacement sliding compensation along the bumps and grooves when the multi - functional composite sheath 4 deforms, so as to maintain the stability of the overall cable structure;

[0066] In this embodiment, by setting like this, when the multi - functional composite sheath 4 generates a slight thrust on the sleeve - type sliding sheath 5 under the condition of thermal expansion, micro - sliding can occur in both the axial and radial directions, thus avoiding stress accumulation. At the same time, even after multiple thermal cycles, the slip function will not fail due to material migration or peeling. During the actual assembly process, a clearance fit of about 0.2 mm needs to be maintained between the multi - functional composite sheath 4 and the sleeve - type sliding sheath 5 to consider the sliding space and friction stability. Through the setting of the above materials, it is ensured that the internal structure of the cable is decoupled and released and the conductor core is safely protected during the high - temperature expansion and contraction process, effectively improving the structural stability and service life of the cable in harsh environments.

[0067] As Figures 1-6 shown, the multi - functional composite sheath 4 is a thermally responsive multi - functional composite sheath structure, including:

[0068] A high - insulation inner layer in direct contact with the cable core 6, and the high - insulation inner layer material is selected from polyetheretherketone or perfluoroalkoxyethylene;

[0069] A flexible elastic intermediate layer for thermal expansion compensation, and the flexible elastic intermediate layer material contains a thermoplastic elastomer and an inorganic particle composite;

[0070] A low - friction sliding outer layer with a polytetrafluoroethylene or molybdenum disulfide coating on the outer surface;

[0071] The low - friction sliding outer layer, the high - insulation inner layer and the flexible elastic intermediate layer are thermally responsive and in sliding fit. Under the temperature change condition of the cable from - 60 °C to + 250 °C, they can still maintain the structural protection of the conductor core wire and the function of compensating for thermal expansion and contraction stress;

[0072] In this embodiment, through such material arrangement, the multi-functional composite sheath 4 can fully protect the cable core 6 during use, and can also withstand and buffer the pushing stress from the cable core 6 and the sleeve-type sliding sheath 5 during the structural expansion process, thus effectively avoiding the structural stress concentration and interface tearing caused by hard contact. In addition, by uniformly spraying polytetrafluoroethylene or molybdenum disulfide microfilm material on the outer surface of the multi-functional composite sheath 4, it can be ensured that when the relative displacement occurs between the multi-functional composite sheath 4 and the sleeve-type sliding sheath 5 due to temperature change, the interface can slide stably without additional lubrication or compensation mechanism, so as to streamline the connection mode of the multi-functional composite sheath 4 and the sleeve-type sliding sheath 5. Even in a high-temperature environment, the structural protection effect of the cable core 6 can still be maintained, and the expansion and contraction compensation can be completed jointly through the elastic release of the intermediate layer and the outer sliding effect, thereby preventing the occurrence of situations such as the conductor core being compressed, broken or the sheath layer being torn.

[0073] As Figures 1-6 shown, the sleeve-type sliding sheath 5 is arranged in a sleeve-type structure, including:

[0074] A main body layer composed of a blend modification of thermoplastic elastomer and engineering plastic nylon and doped with ceramic microbeads or hollow glass micro-particles;

[0075] An inner contact layer and an outer contact layer made of the same material as the low-friction sliding outer layer;

[0076] In this embodiment, its main body layer is formed by blend modification of thermoplastic elastomer engineering plastic nylon. The two are physically cross-linked through the blending process to have both flexibility and strength, and then 5% - 10% of ceramic microbeads or hollow glass microbeads are uniformly doped in the material system to form a flexible support layer with a micro-cavity structure, so as to reduce the impact pressure on the inner wall of the sleeve-type sliding sheath 5 caused by the thermal expansion of the multi-functional composite sheath 4. Through the above material arrangement, the smooth sliding and automatic reset of the multi-functional composite sheath 4 relative to the sleeve-type sliding sheath 5 can be realized during the use of the cable, avoiding the phenomena of structural biting, jamming or local tearing during the high-temperature expansion and contraction process. At the same time, the flexible buffer provided by the modified nylon matrix and the energy absorption mechanism of the porous ceramic filler can also effectively extend the service life of the cable during the high-frequency thermal cycle process.

[0077] As Figures 1-6 shown, an elastic reset member 10 is installed through the inside of the sleeve-type sliding sheath 5. The elastic reset member 10 is used to pull two sleeve-type sliding sheaths 5 to reset. The sleeve-type sliding sheaths 5 are arranged at intervals. The sleeve-type sliding sheaths 5 at both ends are fixedly arranged. The elastic reset member 10 includes:

[0078] Elastic inner core layer, made of high-rebound silicone rubber filaments, with elastic recovery ability and anti-aging performance in the range of -60°C to +250°C;

[0079] Functional composite coating layer, including:

[0080] Polyimide film coating layer, coated on the outside of the elastic inner core layer, used to enhance high-temperature stability and structural flexibility;

[0081] Outer fiber reinforcement layer, coated on the outside of the polyimide film coating, composed of aramid fibers, used to enhance the overall tensile strength of the structure and improve the reset accuracy;

[0082] Coated polytetrafluoroethylene microfilm layer, coated on the surface of the outer fiber reinforcement layer, used to form a low-friction surface;

[0083] In this embodiment, the elastic reset member 10 adopts a multi-material composite coating design. During actual operation, it can automatically generate elastic pulling back according to the spacing change of the sleeve-type sliding sheath 5, and through the multi-layer collaborative control of the deformation direction and deformation amount of the structure, it ensures that the overall structure of the cable can still maintain dynamic stability and the integrity of the internal conductor alignment under the scenario of repeated high and low temperature alternation. At the same time, through the design of multi-materials, it also avoids tensile runaway or local fracture during the thermal cycle process.

[0084] As Figures 1-6 shown, friction support blocks 11 are provided on both the surface and the inner wall of the sleeve-type sliding sheath 5. The friction support blocks 11 are used to further reduce the moving friction of the sleeve-type sliding sheath 5;

[0085] In this embodiment, in order to further reduce the interfacial frictional resistance when the sleeve-type sliding sheath 5 slides with its adjacent structures in the high and low temperature alternating environment, friction support blocks 11 are uniformly provided on the surface and the inner wall of the sleeve-type sliding sheath 5. The friction support blocks 11 are friction support block structures fixedly connected to the inner and outer surfaces of the sleeve-type sliding sheath 5 in a forming manner. The friction support blocks 11 are injection molded with polyimide-reinforced PTFE composite materials. The polyimide skeleton provides support rigidity to ensure that the friction blocks will not fall off or be abraded on the surface under the condition of variable deformation amount. And the friction support blocks 11 can also be maintained by modular replacement after the cable runs for a long time, without affecting the integrity of the main structure of the sleeve-type sliding sheath 5.

[0086] The friction support blocks 11 are arranged in an array on the outer surface and the axially extending direction of the inner wall of the sleeve-type sliding sheath 5, and the arrangement method is ring-embedded. Each friction support block 11 forms a micro-point contact support with the adjacent sliding structure, so as to realize a stable guide effect when the multi-functional composite sheath 4 slides into the sleeve-type sliding sheath 5 or the sleeve-type sliding sheath 5 moves relative to 3, and at the same time, a dynamic fitting interface is formed under the drive of thermal deformation to slow down the sudden conduction of shear friction stress.

[0087] As Figures 1-6 shown, the filler 7 is an elastic foam composite containing micro-particles of phase change material;

[0088] The phase change material is self-phase change paraffin, fatty acid or inorganic phase change material microcapsule;

[0089] The elastic foam composite is composed of phase change material embedded in a silica gel foam matrix;

[0090] The micro-particles are embedded in the elastic foam composite to form a porous energy absorption structure;

[0091] The limit pulling member 9 is installed in an intermittent arrangement, and the limit pulling member 9 is composed of polyether ether ketone, polyphenylene sulfide or epoxy glass fiber reinforced composite plastic material;

[0092] In this embodiment, the limit pulling member 9 has a strip-shaped tab structure, and the limit pulling member 9 can form a point-to-point lock with the foam microstructure in the filler 7, so as to limit the deformation amount of the core cable core 6 from exceeding the preset tolerance when the core cable core 6 undergoes thermal deformation. And it is proposed above that the limit pulling member 9 is installed in an intermittent arrangement, and the specific installation distance is calculated as follows:

[0093]

[0094] wherein, L9 is the actual installation distance between two adjacent limit pulling members, E is the unit friction energy along the sliding path, represents the differential growth rate of the friction energy along the path s, is the structural acceleration curvature component in the heat-guided path of the limiter, s is the actual path length of a single limit sliding channel, Δx i represents the maximum offset of the i-th core under full-load thermal expansion, l i is the elastic expansion length that the i-th limit structure can withstand, D i is the physical diameter of the i-th core, and N is the total number of cores, which is used for the overall average layout of the limiters;

[0095] If L9 > D, the limiters are configured too densely, and there is insufficient space for structural expansion absorption, which may cause stagnation failure; if L9 ∈ [2D, 4D], it is the theoretically optimal layout range. At this time, the arrangement spacing of the limit pulling member 9 can balance the limit density and the slip energy absorption effect. If L9 < 6D, it means that the limit coverage of the limit pulling member 9 is insufficient, the risk increases, and local dislocation or core stress concentration may occur;

[0096] By setting it in this way, the best installation spacing of the limit pulling member 9 can be effectively determined to ensure its installation and use effect.

[0097] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0098] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A signal cable resistant to high and low temperatures, comprising a cable kit (1), characterized in that: The cable kit (1), the cable kit (1) is installed in a segmented manner, a kit bonding layer (2) is installed at the joint of the two cable kits (1), and the two groups of cable kits (1) are bonded and adhered through the bonding layer (2). An outer sleeve (3) is fitted and installed inside the cable kit (1), a multi-functional composite protective layer (4) is sleeved inside the outer sleeve (3), a cable core (6) is installed inside the multi-functional composite protective layer (4), a sleeve-type sliding protective sheath (5) is sleeved on the surface of the multi-functional composite protective layer (4), and the sleeve-type sliding protective sheath (5) is installed at intervals on the surface of the multi-functional composite protective layer (4).

2. The high and low temperature resistant signal cable according to claim 1, characterized in that: A filler (7) is filled in the gap between the two cable cores (6), the filler (7) is filled inside the multi-functional composite protective layer (4), air holes (8) are opened inside the filler (7), a limiting and pulling member (9) is arranged inside the filler (7), and both ends of the limiting and pulling member (9) are respectively lapped on the surfaces of two adjacent cable cores (6).

3. The high and low temperature resistant signal cable according to claim 2, characterized in that: Grooves are opened on the surface of the multi-functional composite protective layer (4), bumps are opened on the inner wall of the sleeve-type sliding protective sheath (5), and the bumps match the grooves; A low-friction coating is applied to the contact sliding surface between the multi-functional composite protective layer (4) and the sleeve-type sliding protective sheath (5), and the coating is selected from one of polytetrafluoroethylene, molybdenum disulfide or graphite coating, so as to reduce the friction force generated by the relative movement of the sleeve-type sliding protective sheath (5) during thermal expansion and contraction; The sleeve-type sliding protective sheath (5) can realize axial micro-displacement sliding compensation along the bumps and the grooves when the multi-functional composite protective layer (4) deforms.

4. The high and low temperature resistant signal cable according to claim 1, characterized in that, The multi-functional composite protective layer (4) is a heat-responsive multi-functional composite protective layer structure, including: A high-insulation inner layer in direct contact with the cable core (6), and the high-insulation inner layer material is selected from polyether ether ketone or perfluoroalkoxy ethylene; A flexible elastic intermediate layer for thermal expansion compensation, and the flexible elastic intermediate layer material contains a composite of thermoplastic elastomer and inorganic particles; A low-friction sliding outer layer with a polytetrafluoroethylene or molybdenum disulfide coating on the outer surface.

5. The high and low temperature resistant signal cable according to claim 3, characterized in that, The sleeve-type sliding protective sheath (5) is arranged in a sleeve-type structure, including: A main body layer composed of a blend modification of thermoplastic elastomer and engineering plastic nylon and doped with ceramic microbeads or hollow glass microspheres; Inner and outer contact layers made of the same material as the low-friction sliding outer layer.

6. The high and low temperature resistant signal cable according to claim 5, characterized in that, An elastic reset member (10) is installed through the inside of the sleeve-type sliding protective sheath (5), and the elastic reset member (10) is used to pull the two sleeve-type sliding protective sheaths (5) to reset. The sleeve-type sliding protective sheaths (5) are arranged at intervals, and the sleeve-type sliding protective sheaths (5) at both ends are fixedly arranged. The elastic reset member (10) includes: An elastic inner core layer, made of high-rebound silica gel rubber wire, with elastic recovery ability and aging resistance in the range of -60°C to +250°C; A functional composite coating layer, including: A polyimide film coating layer, which is coated on the outside of the elastic inner core layer, is used to improve high-temperature stability and structural flexibility; An outer fiber reinforcement layer, which is coated on the outside of the polyimide film coating, is composed of aramid fibers, and is used to enhance the overall tensile strength of the structure and improve the reset accuracy; A polytetrafluoroethylene microfilm coating layer, which is coated on the surface of the outer fiber reinforcement layer, is used to form a low-friction surface.

7. The high and low temperature resistant signal cable according to claim 4, characterized in that: Friction support blocks (11) are arranged on both the surface and the inner wall of the sleeve-type sliding sheath (5), and the friction support blocks (11) are used to further reduce the moving friction of the sleeve-type sliding sheath (5).

8. A high and low temperature resistant signal cable according to claim 2, wherein: The filler (7) is an elastic foam composite containing micro-particles of a phase change material; The phase change material is self-phase change paraffin, fatty acid or inorganic phase change material microcapsules; The elastic foam composite is formed by embedding a phase change material into a silica gel foam matrix; The micro-particles are embedded in the elastic foam composite to form a porous energy-absorbing structure; The limit pulling member (9) is arranged in an intermittent arrangement, and the limit pulling member (9) is composed of polyether ether ketone, polyphenylene sulfide or epoxy glass fiber reinforced composite plastic material.

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