A high and low temperature resistant signal cable

Abstract

The present invention discloses a high and low temperature resistant signal cable, which belongs to the technical field of high and low temperature resistant signal cables, comprising: a cable kit, wherein the cable kit is installed in sections, a kit adhesive layer is installed at the connection of the cable kit, the interior of the cable kit is fitted with a multifunctional composite sheath, a cable core is installed inside the multifunctional composite sheath, and a sleeve-type sliding sheath is provided on the surface of the multifunctional composite sheath; by arranging a multi-layer nested structure, the internal structure of the cable can realize automatic adjustment of thermal expansion and contraction and stress release during repeated changes in high and low temperatures, thereby solving the problem that the cable core is easily failed due to expansion, extrusion or shrinkage displacement; by arranging a limiting pull member and an elastic reset member, the structure is automatically reset after thermal deformation, thereby ensuring the stability of the cable structure during long-term operation.

Description

Technical Field

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

[0002] Currently, in applications such as aerospace, oil exploration, polar communications, and tunnel automation that require extremely high environmental adaptability, signal cables are constantly facing various problems such as frequent alternations of high and low temperatures and accumulated thermal stress.

[0003] Traditional cables generally use a fixed-layer coating or continuous limiting structure. Although these structures can provide basic mechanical protection, they are often susceptible to structural fatigue caused by uneven deformation due to thermal expansion and contraction in complex environments. This can lead to problems such as interlayer delamination, core deviation, and even breakdown failure, seriously affecting the cable's service life and signal transmission stability.

[0004] To address the above issues, most existing technologies on the market use bonding or rigid biting methods. The cables lack flexible response and adjustment capabilities, which not only leads to large sliding resistance and easy jamming, but also easily causes fatigue fracture under long-term thermal and mechanical alternating loads due to excessive structural rigidity, thus failing to effectively ensure the stability of the cable core.

[0005] In addition, the internal conductor structure is prone to local expansion and contraction inconsistencies due to uneven thermal stress, which can easily lead to structural instability, interface delamination and other related problems.

[0006] Therefore, in order to solve the above problems, we 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, wherein the cable kit is installed in sections, a kit adhesive layer is installed at the abutting point of two cable kits, an outer sleeve is installed in contact with the interior of the cable kit, and the two sets of cable kits are bonded together by the adhesive layer, a multifunctional composite sheath is sheathed inside the outer sleeve, a cable core is installed inside the multifunctional composite sheath, a sleeve sliding sheath is sheathed on the surface of the multifunctional composite sheath, the sleeve sliding sheath is installed at intervals on the surface of the multifunctional composite sheath, and the sleeve sliding sheath overlaps the inner wall of the outer sleeve;

[0009] Furthermore, the cable cores are installed in multiple groups of spiral connections, and the gaps between the two cable cores are filled with fillers, which are filled inside the multifunctional composite sheath, and air bubbles are opened inside the fillers. A limiting pull member is provided inside the filler, and the two ends of the limiting pull member are respectively overlapped on the surfaces of two adjacent cable cores.

[0010] Furthermore, a groove is provided on the surface of the multifunctional composite sheath, and a convex block is provided on the inner wall of the sleeve-type sliding sheath, and the convex block matches the groove;

[0011] The contact sliding surface between the multifunctional composite sheath and the sleeve-type sliding jacket is coated with a low-friction coating, the coating being selected from one of polytetrafluoroethylene, molybdenum disulfide or graphite coating, for reducing the friction generated by relative movement during thermal expansion and contraction;

[0012] The sleeve-type sliding sheath can achieve axial micro-displacement sliding compensation along the protrusion and the groove when the multifunctional composite sheath is deformed, so as to maintain the stability of the overall structure of the cable.

[0013] Furthermore, the multifunctional composite sheath is a thermally responsive multifunctional composite sheath structure, comprising:

[0014] A high-insulation inner layer in direct contact with the cable core, wherein the material of the high-insulation inner layer is selected from polyetheretherketone or perfluoroalkoxyethylene;

[0015] A flexible elastic intermediate layer for thermal expansion compensation, wherein the flexible elastic intermediate layer material comprises a composite of a thermoplastic elastomer and inorganic particles;

[0016] The outer surface is coated with a low-friction sliding outer layer of polytetrafluoroethylene or molybdenum disulfide coating;

[0017] The low-friction sliding outer layer, high-insulation inner layer and flexible elastic middle layer can maintain structural protection of the conductor core wire and thermal expansion and contraction stress compensation functions through thermal responsiveness and sliding cooperation when the cable experiences temperature changes from -60°C to +250°C.

[0018] Furthermore, the sleeve-type sliding sheath is a sleeve-type structure, comprising:

[0019] The main layer is made of a modified blend of thermoplastic elastomer and engineering plastic nylon and mixed with ceramic microspheres or hollow glass particles;

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

[0021] Furthermore, an elastic reset member is installed through the interior of the sleeve-type sliding sheath, and the elastic reset member is used to pull the two sleeve-type sliding sheaths to reset. The sleeve-type sliding sheaths are installed in an interval arrangement, and the sleeve-type sliding sheaths at both ends are fixed. The elastic reset member includes:

[0022] The elastic inner core layer is made of high-rebound silicone rubber wire, which has elastic recovery and aging resistance within the range of -60℃ to +250℃;

[0023] Functional composite coating, 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] The outer fiber reinforcement layer is coated on the outside of the polyimide film and is composed of aramid fibers to enhance the overall tensile strength of the structure and improve the reset accuracy;

[0026] A polytetrafluoroethylene micro film layer is coated on the surface of the outer fiber reinforcement layer to form a low friction surface.

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

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

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

[0030] The elastic foam composite is composed of a phase change material 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 position-limiting pulling members are installed in an intermittent arrangement and are made of polyetheretherketone, polyphenylene sulfide or epoxy glass fiber reinforced composite plastic material.

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

[0034] By setting up a multi-layer nested structure, the internal structure of the cable can achieve automatic adjustment of thermal expansion and contraction and stress release during repeated changes in high and low temperatures, thus solving the problem of cable core failure easily caused by expansion, extrusion or shrinkage displacement;

[0035] By setting the limit pulling member and the elastic reset member, the structure can be automatically reset after thermal deformation, ensuring the stability of the cable structure during long-term operation;

[0036] By calculating the installation spacing of the limit pullers, the problem of traditional limiters being easily arranged too sparsely or too densely is avoided, thereby improving the cable's internal adaptability to nonlinear deformation;

[0037] The combined use of a multifunctional composite sheath and a sleeve-type sliding sheath improves the overall dynamic deformation adaptability of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 This is a schematic structural diagram of the cable of the present invention after the entire cable is cut through the cable kit connection;

[0040] Figure 2 It is a partial cross-sectional structural schematic diagram of the multifunctional composite sheath and cable core of the present invention;

[0041] Figure 3 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0042] Figure 4 This is a schematic diagram of the sleeve connection structure of the multifunctional 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 structure between the elastic reset member and the sleeve-type sliding sheath of the present invention;

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

[0045] Figure 7 This is a schematic diagram of the responsive multifunctional composite sheath structure of the present invention;

[0046] Figure 8 This is a schematic diagram illustrating the sleeve-type sliding sheath of the present invention as a sleeve-type structure;

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

[0048] Figure 10 It is a schematic diagram of the overall structure of the cable of the present invention.

[0049] In the picture:

[0050] 1. Cable kit; 2. Kit adhesive layer; 3. Outer sleeve; 4. Multifunctional composite sheath; 5. Sleeve-type sliding sheath; 6. Cable core; 7. Filler; 8. Air bubble hole; 9. Limiting pull piece; 10. Elastic reset piece; 11. Friction support block. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] Example:

[0053] The following is combined with Figure 1-6 The present invention is described in further detail.

[0054] See also Figure 1-6 The present invention provides a technical solution: a high and low temperature resistant signal cable, such as Figure 1-6 As shown, it includes: a cable kit 1, which is installed in sections, with a kit adhesive layer 2 installed at the abutment of two cable kits 1, an outer sleeve 3 is installed in the interior of the cable kit 1, a multifunctional composite sheath 4 is sheathed inside the outer sleeve 3, a cable core 6 is installed inside the multifunctional composite sheath 4, a sleeve sliding sheath 5 is sheathed on the surface of the multifunctional composite sheath 4, the sleeve sliding sheath 5 is installed at intervals on the surface of the multifunctional composite sheath 4, the sleeve sliding sheath 5 and the inner wall of the outer sleeve 3 are overlapped, and the two sets of cable kits 1 are abutted and bonded by the adhesive layer 2;

[0055] In this embodiment: through the mutual cooperation between the multi-layer nested structures such as the cable kit 1, the outer sleeve 3, the multifunctional 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 multifunctional composite sheath 4 as a transmission medium, and the multifunctional composite sheath 4 provides directional covering and protection. The sleeve-type sliding sheath 5 is provided outside the multifunctional composite sheath 4. The sleeve-type sliding sheath 5 forms a sliding pair cooperation relationship with the multifunctional composite sheath 4, so that when the temperature rises or falls, causing the multifunctional composite sheath 4 to expand or contract, the multifunctional composite sheath 4 can undergo axial or radial micro-displacement on the inner wall of the sleeve-type sliding sheath 5, thereby releasing the structural internal stress caused by thermal change, thereby preventing the multifunctional composite sheath 4 from excessive deformation and squeezing the cable core 6, causing damage to the cable core 6;

[0056] In addition, the main body of the sleeve-type sliding sheath 5 is coated inside the outer sleeve 3, which is the outer structural layer and is firmly connected to the cable sheath 1 through the sheath adhesive layer 2. When temperature changes cause the multi-layer structure to have different thermal expansion coefficients, the adhesion of the sheath adhesive layer 2 can prevent interlayer displacement and ensure the overall consistency of the outer sleeve 3 and the cable sheath 1. The multi-section bonding and splicing of the sheath adhesive layer 2 also facilitates the cutting of the entire cable.

[0057] Furthermore, in order to suppress the structural drift problem caused by thermal expansion and contraction, we fill the multiple cable cores 6 with fillers 7. The fillers 7 have flexible buffering and heat absorption capabilities. When the external temperature changes drastically, the fillers 7 can maintain the stable position of the cable cores 6 in space. At the same time, the internally embedded air bubbles 8 form a porous buffer structure to improve the stress release capability. This ensures that when the temperature is too high, the expansion inside the cable will not cause local accumulation problems, which will lead to a reduction in the overall service life of the cable.

[0058] In order to prevent the cable core 6 from being displaced axially or radially in the event of environmental changes, a limiting pulling member 9 is embedded inside the filling member 7. It can be seen that the limiting pulling member 9 is intermittently arranged and forms a mechanical limiting relationship with the multiple cable cores 6. When the cable core 6 has a tendency to thermally expand due to temperature increase, its displacement limit is limited; after the temperature drops, the elastic reset member 10 runs through the two sleeve-type sliding sheaths 5 and provides pulling tension, which can restore the sleeve-type sliding sheaths 5 to their initial symmetrical state, thereby driving the multifunctional composite sheath 4 and the internal structure to return to their original position as a whole, completing the overall sliding and reset process. In this way, while ensuring the overall protection of the cable, irreversible damage to the cable interior due to thermal expansion will not occur.

[0059] To prevent high friction losses and wear failure between the multifunctional composite sheath 4 and the sleeve-type sliding sheath 5 during sliding during multiple thermal cycles, multiple friction support blocks 11 are arranged on the inner wall and outer surface of the sleeve-type sliding sheath 5. The friction support blocks 11 reduce the direct friction contact area between the multifunctional composite sheath 4 and the sleeve-type sliding sheath 5 by forming sliding fulcrums, while also providing guidance to ensure a stable trajectory of the multifunctional 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] like Figure 1-6 As shown, the cable cores 6 are installed in multiple groups of spiral connections, and the gaps between the two cable cores 6 are filled with fillers 7, which are filled inside the multifunctional composite sheath 4. Bubble holes 8 are opened inside the filler 7, and a limiting pulling member 9 is set inside the filler 7. The two ends of the limiting pulling member 9 are respectively overlapped on the surfaces of the two adjacent cable cores 6.

[0062] In this embodiment, the sleeve-type sliding sheath 5 is formed into an annular shell with an internal sliding groove structure, thereby maintaining a sliding fit with the multifunctional composite sheath 4. At low temperatures, when the multifunctional composite sheath 4 material slightly shrinks and produces relative displacement, the sleeve-type sliding sheath 5 can cooperate with its internal cavity to allow the multifunctional composite sheath 4 to retract axially. When the temperature rises and the multifunctional composite sheath 4 expands, it can adaptively expand radially along the sleeve-type sliding sheath 5, thereby ensuring that the cable core 6 remains in a non-compressed state under any temperature changes. The filler 7 is cast from an elastic energy-absorbing material and contains a plurality of air bubbles 8, which provide a buffer gap throughout the filler 7 area. During operation, this structure not only achieves heat absorption and structural rebound, but also prevents the cable core 6 from being disturbed due to instability during alternating high and low temperature conditions, thereby ensuring the safety of the cable core 6. In addition, when the cable core 6 is deformed due to heat, the limiting pull member 9 can limit it through the elastic sliding groove to prevent excessive displacement.

[0063] like Figure 1-6 As shown, the surface of the multifunctional composite sheath 4 is provided with a groove, and the inner wall of the sleeve-type sliding sheath 5 is provided with a bump, which matches the groove;

[0064] The contact sliding surface between the multifunctional composite sheath 4 and the sleeve-type sliding sheath 5 is coated with a low-friction coating selected from one of polytetrafluoroethylene, molybdenum disulfide or graphite coating, which is used to reduce the friction generated by relative movement during thermal expansion and contraction;

[0065] When the multifunctional composite sheath 4 is deformed, the sleeve-type sliding sheath 5 can achieve axial micro-displacement sliding compensation along the protrusions and grooves to maintain the stability of the overall cable structure;

[0066] In this embodiment, by such an arrangement, when the multifunctional composite sheath 4 generates a slight thrust on the sleeve-type sliding sheath 5 under thermal expansion conditions, micro-slipping can occur in both the axial and radial directions, thereby avoiding stress accumulation. At the same time, even after multiple thermal cycles, the sliding function will not fail due to material migration or peeling. In the actual assembly process, a clearance of about 0.2 mm needs to be maintained between the multifunctional composite sheath 4 and the sleeve-type sliding sheath 5 to take into account the sliding space and friction stability. Through the arrangement of the above materials, the decoupling and release of the internal structure of the cable and the safety protection of the conductor core during high-temperature expansion and contraction are ensured, effectively improving the structural stability and service life of the cable in harsh environments.

[0067] like Figure 1-6 As shown, the multifunctional composite sheath 4 is a thermally responsive multifunctional composite sheath structure, comprising:

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

[0069] A flexible elastic intermediate layer for thermal expansion compensation, wherein the flexible elastic intermediate layer material comprises a composite of a thermoplastic elastomer and inorganic particles;

[0070] The outer surface is coated with a low-friction sliding outer layer of polytetrafluoroethylene or molybdenum disulfide coating;

[0071] The low-friction sliding outer layer, high-insulation inner layer and flexible elastic middle layer are thermally responsive and slide-fitted. When the cable experiences temperature changes from -60°C to +250°C, it can still maintain the structural protection of the conductor core and the thermal expansion and contraction stress compensation function.

[0072] In this embodiment, by configuring the material in this manner, the multifunctional composite sheath 4 can fully protect the cable core 6 during use, and can also withstand and buffer the displacement stress between the cable core 6 and the sleeve-type sliding sheath 5 during structural expansion, thereby effectively avoiding 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 multifunctional composite sheath 4, it can be ensured that when temperature changes cause relative displacement between the multifunctional composite sheath 4 and the sleeve-type sliding sheath 5, their interface can slide stably without the need for additional lubrication or compensation mechanisms. This simplifies the connection between the multifunctional composite sheath 4 and the sleeve-type sliding sheath 5, and even in high-temperature environments, the structural protection effect of the cable core 6 can be maintained, and expansion and contraction compensation can be achieved through the elastic release of the intermediate layer and the sliding effect of the outer layer, thereby preventing the conductor core from being compressed, broken, or the sheath layer from being torn.

[0073] like Figure 1-6 As shown, the sleeve-type sliding sheath 5 is a sleeve-type structure, comprising:

[0074] The main layer is made of a modified blend of thermoplastic elastomer and engineering plastic nylon and mixed with ceramic microspheres or hollow glass particles;

[0075] Inner and outer contact layers made of the same material as the low-friction sliding outer layer;

[0076] In this embodiment, the main layer is formed by a modified blend of thermoplastic elastomer and engineering plastic nylon. The two are physically cross-linked through a blending process to achieve both flexibility and strength. Then, 5% to 10% of ceramic microspheres or hollow glass microspheres are evenly added to 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 multifunctional composite sheath 4. Through the arrangement of the above materials, the multifunctional composite sheath 4 can achieve smooth sliding and automatic reset relative to the sleeve-type sliding sheath 5 during the use of the cable, avoiding structural biting, jamming or local tearing during high-temperature expansion and contraction. At the same time, the flexible buffer provided by the modified nylon matrix and the synergistic energy absorption mechanism of the porous ceramic filler can also effectively extend the service life of the cable during high-frequency thermal cycling.

[0077] like Figure 1-6 As shown, an elastic reset member 10 is installed inside the sleeve-type sliding sheath 5. The elastic reset member 10 is used to pull the two sleeve-type sliding sheaths 5 to reset. The sleeve-type sliding sheaths 5 are installed in an interval arrangement, and the sleeve-type sliding sheaths 5 at both ends are fixed. The elastic reset member 10 includes:

[0078] The elastic inner core layer is made of high-rebound silicone rubber wire, which has elastic recovery and aging resistance within the range of -60℃ to +250℃;

[0079] Functional composite coating, including:

[0080] A polyimide film coating layer is coated on the outside of the elastic inner core layer to improve high temperature stability and structural flexibility;

[0081] The outer fiber reinforcement layer is coated on the outside of the polyimide film and is composed of aramid fibers to enhance the overall tensile strength of the structure and improve the reset accuracy;

[0082] A polytetrafluoroethylene micro film layer is coated on the surface of the outer fiber reinforcement layer 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 pullback according to the changes in the spacing of the sleeve-type sliding sheath 5, and through multi-layer collaborative control of the structural deformation direction and deformation amount, it ensures that the overall structure of the cable can still maintain dynamic stability and internal conductor alignment integrity under repeated high and low temperature alternation scenarios. At the same time, through the multi-material design, it also avoids tensile uncontrolled or local fracture during thermal cycling.

[0084] like Figure 1-6 As shown, the surface and inner wall of the sleeve-type sliding sheath 5 are provided with friction support blocks 11, and the friction support blocks 11 are used to further reduce the movement friction of the sleeve-type sliding sheath 5;

[0085] In this embodiment, in order to further reduce the interface friction resistance between the sleeve-type sliding sheath 5 and its adjacent structures when sliding in an alternating high and low temperature environment, friction support blocks 11 are evenly arranged on the surface and inner wall of the sleeve-type sliding sheath 5. The friction support blocks 11 are friction support block structures that are fixed to the inner and outer surfaces of the sleeve-type sliding sheath 5 in a molding manner. The friction support blocks 11 are injection-molded using polyimide-reinforced PTFE composite materials, and the polyimide skeleton provides support rigidity to ensure that the friction blocks will not fall off or suffer surface abrasion under conditions of deformation changes. In addition, the friction support blocks 11 can also be maintained through modular replacement after the cable has been running 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 axial extension direction of the inner wall of the sleeve-type sliding sheath 5, and are arranged in a ring-shaped embedded manner. Each friction support block 11 forms a micro-point contact support with the adjacent sliding structure, thereby achieving a stable guide rail effect when the multifunctional composite sheath 4 slides into the sleeve-type sliding sheath 5 or the sleeve-type sliding sheath 5 moves relative to 3. At the same time, a dynamic fitting interface is formed under the drive of thermal deformation to slow down the sudden change transmission of shear friction stress.

[0087] like Figure 1-6 As shown, the filling member 7 is an elastic foam composite containing microparticles 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 a phase change material embedded in a silicone foam matrix;

[0090] The microparticles are embedded in the elastic foam composite to form a porous energy-absorbing structure;

[0091] The limiting pull member 9 is installed in an intermittent arrangement and is made of polyetheretherketone, polyphenylene sulfide or epoxy glass fiber reinforced composite plastic material;

[0092] In this embodiment, the limiting pull member 9 is a strip-shaped protruding structure. The limiting pull member 9 can form a point-to-point locking connection with the foam microstructure in the filler 7, thereby limiting the deformation of the core cable core 6 from exceeding the preset tolerance when thermal deformation occurs. In addition, the limiting pull member 9 is proposed to be installed in an intermittent arrangement. The specific installation distance is calculated as follows:

[0093]

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

[0095] If L9>D, the limiters are too densely arranged, and there is insufficient space to absorb structural expansion, which may cause stagflation failure. If L9∈[2D,4D], it is the theoretically optimal arrangement range. At this time, the arrangement spacing of the limit pull members 9 can take into account both the limit density and the sliding energy absorption effect. If L9<6D, it means that the limit coverage of the limit pull members 9 is insufficient, the risk increases, and local dislocation or core stress concentration may occur.

[0096] By such an arrangement, the optimal installation spacing of the position-limiting pulling member 9 can be effectively determined to ensure the installation and use effect thereof.

[0097] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0098] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A high and low temperature resistant signal cable, comprising a cable kit (1), characterized in that: A cable kit (1) is installed in sections, a kit adhesive layer (2) is installed at the abutting position of two cable kits (1), and the two groups of cable kits (1) are abutted and bonded by the adhesive layer (2); an outer sleeve (3) is installed inside the cable kit (1), a multifunctional composite sheath (4) is provided inside the outer sleeve (3), a cable core (6) is installed inside the multifunctional composite sheath (4), a sleeve-type sliding sheath (5) is provided on the surface of the multifunctional composite sheath (4), and the sleeve-type sliding sheath (5) is installed on the surface of the multifunctional composite sheath (4) in a spaced manner.

2. The high and low temperature resistant signal cable according to claim 1, characterized in that: The gap between the two cable cores (6) is filled with a filling piece (7), the filling piece (7) is filled in the interior of the multifunctional composite sheath (4), the interior of the filling piece (7) is provided with air bubble holes (8), the interior of the filling piece (7) is provided with a limiting pulling piece (9), and the two ends of the limiting pulling piece (9) are respectively overlapped on the surfaces of the two adjacent cable cores (6).

3. The high and low temperature resistant signal cable according to claim 2, characterized in that: The surface of the multifunctional composite protective layer (4) is provided with a groove, and the inner wall of the sleeve-type sliding sheath (5) is provided with a convex block, and the convex block matches the groove; The contact sliding surface between the multifunctional composite protective layer (4) and the sleeve-type sliding sheath (5) is coated with a low-friction coating, wherein the coating is selected from one of polytetrafluoroethylene, molybdenum disulfide or graphite coating, and is used to reduce the friction force generated by the relative movement of the sleeve-type sliding sheath (5) during thermal expansion and contraction; The sleeve-type sliding sheath (5) can achieve axial micro-displacement sliding compensation along the protrusion and the groove when the multifunctional composite sheath (4) is deformed.

4. The high and low temperature resistant signal cable according to claim 1, characterized in that: The multifunctional composite protective layer (4) is a thermally responsive multifunctional composite protective layer structure, comprising: A high-insulation inner layer in direct contact with the cable core (6), wherein the material of the high-insulation inner layer is selected from polyetheretherketone or perfluoroalkoxyethylene; A flexible elastic intermediate layer for thermal expansion compensation, wherein the flexible elastic intermediate layer material comprises a composite of a thermoplastic elastomer and inorganic particles; The outer surface is coated with a low-friction sliding outer layer of polytetrafluoroethylene or molybdenum disulfide coating.

5. The high and low temperature resistant signal cable according to claim 3, characterized in that: The sleeve-type sliding sheath (5) is a sleeve-type structure, comprising: The main layer is made of a modified blend of thermoplastic elastomer and engineering plastic nylon and mixed with ceramic microspheres or hollow glass particles; An inner contact layer and an outer contact layer are 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 interior of the sleeve-type sliding sheath (5). The elastic reset member (10) is used to pull the two sleeve-type sliding sheaths (5) to reset. The sleeve-type sliding sheaths (5) are installed in an interval arrangement. The sleeve-type sliding sheaths (5) at both ends are fixed. The elastic reset member (10) includes: The elastic inner core layer is made of high-rebound silicone rubber wire, which has elastic recovery and aging resistance within the range of -60℃ to +250℃; Functional composite coating, including: A polyimide film coating layer, coated on the outside of the elastic inner core layer, for improving high temperature stability and structural flexibility; The outer fiber reinforcement layer is coated on the outside of the polyimide film and is composed of aramid fibers to enhance the overall tensile strength of the structure and improve the reset accuracy; A polytetrafluoroethylene micro film layer is coated on the surface of the outer fiber reinforcement layer to form a low friction surface.

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

8. The high and low temperature resistant signal cable according to claim 2, characterized in that: The filling member (7) is an elastic foam composite containing microparticles of phase change material; The phase change material is self-phase change paraffin, fatty acid or inorganic phase change material microcapsule; The elastic foam composite is composed of a phase change material embedded in a silicone foam matrix; The microparticles are embedded in the elastic foam composite to form a porous energy-absorbing structure; The position-limiting pulling member (9) is installed in an intermittent arrangement, and the position-limiting pulling member (9) is made of polyetheretherketone, polyphenylene sulfide or epoxy glass fiber reinforced composite plastic material.

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