Anti-interference flame-retardant cable

Abstract

The invention discloses an anti-interference flame-retardant cable, which relates to the technical field of power cables, and is characterized by comprising an outer protection layer consisting of a rubber outer sheath, a metal armor and a protection mechanism, an inner protection layer consisting of a wrapping tape, a fireproof layer and a waterproof insulating layer, and a plurality of groups of guide cores wrapped in the waterproof insulating layer, the rubber outer sheath, the metal armoring and protection mechanism, the wrapping tape, the fireproof layer and the waterproof insulating layer are arranged in sequence from outside to inside, the overall layer of the cable is effectively divided through the protection mechanism formed by a plurality of annular assemblies, and the metal annular seats of the annular assemblies are arranged in the fireproof layer. The annular assemblies can resist the pressure directly generated by the outside of the cable, when torsion is generated outside the cable, the annular seats buffer the external torsion through the springs among the annular seats, the influence on the inner protection layer is reduced to a large extent, in addition, when the cable is connected, the position of the inner protection layer can be finely adjusted through the rotating structures of the annular assemblies, and therefore the stability of the cable is improved. And the connection of the cable is accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and more particularly to an anti-interference flame-retardant cable. Background Art

[0002] Cable is a device for transmitting electric energy or signals. It can be divided into power cables, communication cables and control cables according to its use. It can be divided into single-core cables, multi-core cables and shielded cables according to its structure. There are multiple structural layers inside the cables. There are certain differences between the structural layers of different cables according to the application. For anti-interference flame-retardant cables, this type of cable can realize power / signal transmission while enhancing the high temperature resistance and shielding interference effect of the cable itself by strengthening the flame-retardant structural layer and anti-interference structural layer inside the cable.

[0003] Although this type of cable has good anti-interference and flame retardant effects, due to the relatively fixed internal structure of the cable, based on the protection of the cable itself, especially the forces before, after and during installation, specifically before and during installation, the cable will inevitably be subject to the downward pressure caused by human trampling, the inertia force caused by the swing of the two sides of the cable due to dragging or adjusting the installation position, the torque caused by rotation during the position adjustment process, and the forces caused by different wind directions after installation;

[0004] Currently, all cables on the market use an integrated wrapping structure. When subjected to stress, the cable is protected mainly by the softness and resilience of the rubber outer sheath. Although the rubber sheath can provide protection for the cable, it has certain limitations. On the one hand, when the rubber sheath is subjected to stress, the force transmission is relatively direct, which will also have a certain degree of impact on the internal structure of the cable. On the other hand, when affected by wind force, the rubber sheath can have a buffering effect through its own characteristics. However, if the rubber is subjected to stress for a long time, rubber stretching fatigue will occur, and the rebound efficiency is poor. The linear state of the cable cannot be guaranteed, which affects the transmission of electricity.

[0005] Therefore, in order to solve the above technical problems, the present application proposes an anti-interference flame-retardant cable. Summary of the invention

[0006] In view of the deficiencies in the prior art, an object of the present invention is to provide an anti-interference flame-retardant cable.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-interference flame-retardant cable, comprising an outer protective layer composed of a rubber outer sheath, a metal armor and a protection mechanism, and a wrapping tape, a fireproof layer and a waterproof insulation layer to form an inner protective layer, and also comprising a plurality of groups of conductors wrapped in the waterproof insulation layer, wherein the rubber outer sheath, the metal armor and the protection mechanism and the wrapping tape, the fireproof layer and the waterproof insulation layer are arranged in sequence from the outside to the inside; wherein the protection mechanism comprises a plurality of groups of annular components that wrap the inner protective layer as a whole, and elastic members that are arranged between the plurality of groups of annular components to connect the plurality of groups of annular components; the annular components comprise an annular seat and an annular sheet that is rotatably connected to the inner end surface of the annular seat and in contact with the inner protective layer; the plurality of groups of annular components are provided with a cross-linked polyethylene layer attached by a chemical coupling agent.

[0008] Preferably, the wrapping tape is any one of a glass fiber tape, a semi-conductive cloth tape and a non-woven fabric tape, and an anti-interference layer which is integrally wrapped by a metal sheet is provided between the wrapping tape and the fireproof layer.

[0009] Preferably, the fireproof layer is any one of ceramic silicone rubber, flame retardant paper tape and flame retardant gauze tape, the waterproof insulating layer is any one of polyethylene, expandable coconut fiber, waterproof tape and waterproof paste, and a semiconductive shielding layer is arranged between the waterproof insulating layer and the conductor core, and the semiconductive shielding layer is any one of semiconductive polyethylene, semiconductive rubber and semiconductive gauze.

[0010] Preferably, the annular seat and the annular sheet are both made of metal, a slide groove a is provided on the inner end surface of the annular seat, and slide grooves b for limiting the annular sheet are provided on the seat body on both sides of the slide groove a.

[0011] Preferably, a plurality of groups of spherical parts for driving the annular plate to rotate are arranged circumferentially on the end surface where the annular plate is engaged with the slide groove a, and each group of spherical parts has at least two spherical parts arranged in a transverse structure.

[0012] Preferably, spheres a engaged with the slide grooves b are provided on both sides of the gaps between the plurality of groups of spherical parts, and the spheres a are engaged with the spherical grooves provided on the engaging end faces of the annular pieces.

[0013] Preferably, the spherical part includes a ball sleeve connected to the engaging end surface of the annular sheet and a sphere b engaged in the ball sleeve and in contact with the bottom surface of the slide groove a, and both the sphere b and the sphere a are made of metal.

[0014] Preferably, the elastic member is circumferentially arranged on the side wall of the annular seat for linear connection between multiple groups of the annular components, and the elastic member includes a connecting seat arranged on the side wall of the annular component and a spring connected between two groups of connecting seats.

[0015] Preferably, the multiple groups of elastic members are distributed in an inclined mirror-image manner, and the end surface of the connecting seat connecting the spring is an inclined surface.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The cable in the present invention effectively divides the overall level of the cable through a protection mechanism composed of multiple annular components. The metal annular seat of the annular component can resist the pressure directly generated by the cable from the outside. At the same time, the annular sheet in a rotating structure with the annular seat can realize the relative rotation between the inner and outer protective layers. When torque is generated outside the cable, the multiple annular seats will provide buffering through the springs between them, and greatly reduce the impact on the inner protective layer. Furthermore, when the cable is connected, the position of the inner protective layer can be fine-tuned through the relative rotation characteristics of the annular components, and the cable connection can be accurately performed.

[0018] 2. The annular components in the cable of the present invention, after the cable is linearly connected, are connected by a plurality of inclined mirror-distributed springs. On the one hand, the balance and stability of the cable as a whole can be ensured. On the other hand, when affected by wind forces from different directions, the annular components are softly connected by the springs, and can resist and buffer the forces generated by different wind directions. At the same time, when the force decreases to stop, the spring can drive the cable to quickly reset, and during the resetting process, the external rubber sleeve will also be driven to quickly reset, ensuring the normal flow of electricity while providing protection for the rubber sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is the overall structure diagram of the cable in the present invention;

[0021] Figure 2 It is the overall front view of the cable in the present invention;

[0022] Figure 3 It is the overall structure diagram of the cable internal protection mechanism in the present invention;

[0023] Figure 4 For the present invention Figure 3 A magnified image of point A;

[0024] Figure 5 For the present invention Figure 3 The enlarged view of point B;

[0025] Figure 6 It is a schematic diagram of the protection mechanism under different forces in the present invention;

[0026] Figure 7 It is the overall structural diagram of the annular component in the present invention;

[0027] Figure 8 This is an overall disassembled diagram of the annular assembly in the present invention;

[0028] Fig. 9 For the present invention Figure 8 Enlarged view of point C;

[0029] Fig.10 is a position relationship diagram of the metal sheet in the present invention;

[0030] Fig.11 Schematic diagram of the position relationship of the semi-conductive shielding layer in the present invention.

[0031] 1. Rubber outer sheath; 2. Metal armor; 3. Protection mechanism; 4. Wrapping tape; 5. Fireproof layer; 6. Waterproof insulation layer; 7. Guide core; 8. Ring assembly; 9. Elastic part; 901. Connecting seat; 902. Spring; 10. Ring seat; 1001. Slide a; 1002. Slide b; 11. Ring sheet; 1101. Sphere a; 1102. Ball sleeve; 1103. Sphere b; 12. Metal sheet; 13. Semi-conductive shielding layer. DETAILED DESCRIPTION

[0032] like Figure 1-11 As shown, the present invention provides an anti-interference flame-retardant cable, comprising an outer protective layer composed of a rubber outer sheath 1, a metal armor 2 and a protection mechanism 3, and an inner protective layer composed of a wrapping tape 4, a fireproof layer 5 and a waterproof insulation layer 6, and also comprising a plurality of groups of conductor cores 7 wrapped in the waterproof insulation layer 6, wherein the rubber outer sheath 1, the metal armor 2 and the protection mechanism 3, the wrapping tape 4, the fireproof layer 5 and the waterproof insulation layer 6 are arranged in sequence from the outside to the inside;

[0033] The wrapping tape 4 is any one of a glass fiber tape, a semi-conductive cloth tape and a non-woven fabric tape, such as Fig.10 As shown, an anti-interference layer which is wrapped as a whole by a metal sheet 12 is arranged between the wrapping tape 4 and the fireproof layer 5. The wrapping tape 4 needs to play a role in the stability and tightness of the overall wrapping of the inner protective layer, and also needs to have the effects of corrosion resistance and high temperature resistance. Based on the effects, the wrapping tape 4 of the corresponding material needs to be adaptively selected based on the cable use and different layer structures. The material of the metal sheet 12 can be selected from metals such as copper, aluminum and tungsten. While achieving the anti-interference effect, it can also be adaptively selected according to the characteristics of the metal;

[0034] Meanwhile, the fireproof layer 5 is any one of ceramic silicone rubber, flame retardant paper tape and flame retardant yarn tape, and the waterproof insulating layer 6 is any one of polyethylene, expanded coconut fiber, waterproof tape and waterproof paste, such as Fig.11As shown, a semi-conductive shielding layer 13 is provided between the waterproof insulating layer 6 and the conductor core 7. The semi-conductive shielding layer 13 is any one of semi-conductive polyethylene, semi-conductive rubber and semi-conductive gauze. The fireproof layer 5 mainly tends to be flame retardant, and a material with a small thermal conductivity coefficient needs to be selected. At the same time, the fireproof layer 5 is not limited to ceramic silicone rubber, flame retardant paper tape and flame retardant yarn tape, and the specific application scenario and environment of the cable are determined;

[0035] Furthermore, the waterproof insulating layer 6 mainly provides protection for the conductor core 7. The waterproof insulating layer 6 made of different materials has different effects, including mechanical resistance, waterproof and moisture-proof, improving the shape of the cable, preventing interference, reducing noise, etc. The material selection of this layer is still based on the purpose and layer structure of the cable. It can be selected from lipid fillers such as polyethylene, polyvinyl chloride and polyurethane, or foam materials (polystyrene foam), mineral additives (asbestos, inorganic mineral materials) and water resistance materials (expanded polymers), etc., which are selected based on the actual application of the cable;

[0036] The semi-conductive shielding layer 13 provides secondary protection to the conductor core 7 based on the protection of the waterproof insulating layer 6, such as electromagnetic interference shielding, uniform electric field distribution and leakage reduction, so as to ensure the stability of power transmission;

[0037] While the cable achieves anti-interference and flame retardant effects, it is also necessary to further improve the cable's resistance, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the overall force resistance of the cable is enhanced by a protection mechanism 3 disposed between the metal armor 2 and the wrapping tape 4, and the protection mechanism 3 includes a plurality of annular components 8 that wrap the inner protective layer as a whole and an elastic member 9 that is disposed between the plurality of annular components 8 to connect the plurality of annular components 8;

[0038] Furthermore, in order to achieve the overall protection effect of the inner protective layer, such as Figure 3 As shown, the protection mechanism 3 adopts an annular structure matching the cable, the annular component 8 includes an annular seat 10 and an annular sheet 11 rotatably connected to the inner end surface of the annular seat 10 and in contact with the inner protective layer. The annular sheet 11 and the annular seat 10 are independent structures. The annular sheet 11 can perform circular motion on the annular seat 10. At the same time, the annular sheet 11 is also the contact end of the annular component 8 and the inner protective layer, so that two independent areas are formed between the outer protective layer and the inner protective layer, and the annular sheet 11 is used as the dividing end, as shown in FIG. Figure 6 As shown, the cable rotation generates a torque F τWhen the cable is in a straight line, the outer protective layer will not affect the inner protective layer. If the cable is slightly bent, the protective layer in some areas will be subjected to very small forces. At the same time, when the cable is connected, the inner protective layer can be adjusted as a whole according to the specific connection position of the guide core 7 through the relative rotation between the annular seat 10 and the annular sheet 11 to ensure the accuracy of the connection of the guide core 7.

[0039] Based on the above, in order to achieve the effect of the rotation of the annular sheet 11 and the annular seat 10 and the resistance of the annular seat 10 itself, as Figure 6 , Figure 8 and Fig. 9 As shown, a slide groove a1001 is provided on the inner end surface of the annular seat 10, and slide grooves b1002 for limiting the annular sheet 11 are provided on the seat body on both sides of the slide groove a1001;

[0040] Furthermore, in order to achieve the adaptability of the rotation between the annular seat 10 and ensure the stability of the annular sheet 11 during the rotation process, as Figure 7 , Figure 8 As shown, the end surface of the annular piece 11 and the slide groove a1001 are provided with multiple groups of spherical parts according to the circumference to drive the annular piece 11 to rotate, and each group of spherical parts is provided with at least two spherical parts, and they are arranged in a transverse structure. At the same time, the gaps between the multiple groups of spherical parts are provided with spheres a1101 that are engaged with the slide groove b1002 on both sides, and the spheres a1101 are engaged in the spherical groove holes provided on the end surface of the annular piece 11;

[0041] Specifically, the ball-shaped member includes a ball sleeve 1102 connected to the mating end surface of the annular piece 11 and a ball b1103 which is mated in the ball sleeve 1102 and contacts the bottom surface of the slide groove a1001. The ball b1103 and the ball a1101 are both made of metal. The rotation of the annular piece 11 on the annular seat 10 involves the rotation of two different positions, namely the notch and the groove of the slide groove a1001, both of which adopt the form of ball rolling. The materials of the annular seat 10, the annular piece 11, the ball sleeve 1102, the ball a1101 and the ball b1103 can be steel, copper or a better alloy material. Due to the rotation of the annular piece 11, it is more about the torque F generated by the cable rotation. τ and the position adjustment of the guide core 7. When subjected to forces in other directions, especially after the cable is connected, the rotation of the annular assembly 8 is less involved;

[0042] It should be noted that since the annular seat 10 itself is made of metal, when the cable is idle, the annular seat 10 itself can resist the force directly generated by the outside, and provide effective protection for the inner protective layer. At the same time, in order to improve the contact tightness between the annular sheet 11 and the wrapping belt 4, an integrated particle protrusion can be provided on the end surface where the annular sheet 11 contacts the wrapping belt 4, or a non-slip layer for increasing friction, such as a rubber layer, a nylon layer, etc., can be added to the contact surface of the wrapping belt 4. The spacing between the annular seats 10 needs to be adaptively adjusted according to the cable length, the force environment and the structure of the elastic member 9;

[0043] Furthermore, in order to adapt to the resistance of the cable after connection, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the elastic member 9 for connecting the multiple groups of annular components 8 will be circumferentially arranged on the side wall of the annular seat 10 for linear connection between the multiple groups of annular components 8;

[0044] Specifically, Figure 4 and Figure 6 As shown, the elastic member 9 mainly connects the multiple groups of annular components 8 flexibly, ensuring the linearity of the cable while also adapting to and buffering the forces exerted on the cable in different directions, including Figure 6 F x 、F y and in F x With F y The forces F acting in different directions x-y ;

[0045] The elastic member 9 includes a connection seat 901 disposed on the side wall of the annular component 8 and a spring 902 connected between two sets of connection seats 901. Based on the number and type of the springs 902, an adaptive selection needs to be made according to the size, type and application scenario of the cable.

[0046] Furthermore, the multiple groups of elastic members 9 are distributed in an inclined mirror image, and the end surface of the connecting seat 901 connecting the spring 902 is an inclined surface. The elastic members 9 in an inclined mirror image distribution can provide better balance and stability for the protection mechanism 3 and the cable as a whole, and can better share the force generated between the springs 902.

[0047] In order to avoid the heat conduction effect between the inner and outer protective layers, a cross-linked polyethylene layer attached by a chemical coupling agent is provided on the annular component 8, and the metal annular seat 10 and the annular sheet 11 are isolated from the inner and outer protective layers respectively by the cross-linked polyethylene layer, so that the annular component 8 becomes an independent part that does not affect the inner and outer protective layers;

[0048] In summary, the cable is divided into an outer protective layer and an inner protective layer by the protective mechanism 3. Based on the external pressure or rotating torque generated before and during the installation of the cable, the metal ring seat 10 itself can directly resist the external force. Since the outer protective layer and the inner protective layer are divided by the rotating structure, due to the rotating torque F τ It is the torque F generated directly from the outside of the cable, in the same or different directions τ , will be buffered by the spring 902 between the rubber outer sheath 1 and the annular seat 10. After the force ends, the spring 902 will also quickly drive the rubber outer sheath 1 to reset its deformation, and the torque F τ When the inner protective layer rotates relative to the annular seat 10 and the annular sheet 11, the outer protective layer has little effect on the inner protective layer, thereby providing effective protection for the inner protective layer. Based on the relative rotation, when the cable is connected, the connection position of the inner protective layer can also be fine-tuned by rotation to ensure accurate connection and avoid cumbersome overall cable adjustment. After the cable is connected, it will be subjected to wind forces F in different directions. x 、F y and F x-y When the impact and wind force affect the local area of ​​the cable, the multiple groups of annular seats 10 can effectively buffer the force generated by the cable under the action of the multiple groups of springs 902. At the same time, when the wind force becomes smaller or stops, it will drive the deformation of the cable to reset, avoiding the situation where the rubber outer sheath 1 cannot be reset after being fatigued by force, affecting power transmission. At the same time, the soft connection structure of the protection mechanism 3 can protect the cable without affecting the shipment of the cable.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the invention as shown in the drawings and above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. An anti-interference flame-retardant cable, comprising an outer protective layer consisting of a rubber outer sheath (1), a metal armor (2) and a protection mechanism (3), an inner protective layer consisting of a wrapping tape (4), a fireproof layer (5) and a waterproof insulating layer (6), and also comprising a plurality of conductor cores (7) wrapped in the waterproof insulating layer (6), characterized in that: The rubber outer sheath (1), metal armor (2), protection mechanism (3), wrapping tape (4), fireproof layer (5) and waterproof insulation layer (6) are arranged in sequence from outside to inside; The protection mechanism (3) comprises a plurality of annular components (8) for integrally wrapping the inner protection layer, and an elastic member (9) disposed between the plurality of annular components (8) for connecting the plurality of annular components (8); The annular assembly (8) comprises an annular seat (10) and an annular sheet (11) rotatably connected to the inner end surface of the annular seat (10) and in contact with the inner protective layer; A plurality of groups of the annular components (8) are each provided with a cross-linked polyethylene layer attached via a chemical coupling agent.

2. The anti-interference flame-retardant cable according to claim 1, characterized in that: The wrapping tape (4) is any one of a glass fiber tape, a semi-conductive cloth tape and a non-woven fabric tape, and an anti-interference layer which is integrally wrapped by a metal sheet (12) is provided between the wrapping tape (4) and the fireproof layer (5).

3. The anti-interference flame-retardant cable according to claim 1, characterized in that: The fireproof layer (5) is any one of ceramic silicone rubber, flame retardant paper tape and flame retardant yarn tape; the waterproof insulation layer (6) is any one of polyethylene, expanded coconut fiber, waterproof tape and waterproof paste; a semi-conductive shielding layer (13) is provided between the waterproof insulation layer (6) and the conductor core (7); the semi-conductive shielding layer (13) is any one of semi-conductive polyethylene, semi-conductive rubber and semi-conductive gauze.

4. The anti-interference flame-retardant cable according to claim 1, characterized in that: The annular seat (10) and the annular plate (11) are both made of metal. A slide groove a (1001) is provided at the inner end surface of the annular seat (10). Slide grooves b (1002) for limiting the position of the annular plate (11) are provided on the seat body on both sides of the slide groove a (1001).

5. The anti-interference flame-retardant cable according to claim 4, characterized in that: A plurality of groups of spherical parts are arranged circumferentially on the end surface of the annular plate (11) and the slide groove a (1001) which are engaged with each other, and which drive the annular plate (11) to rotate. Each group of spherical parts has at least two spherical parts and is arranged in a transverse structure.

6. The anti-interference flame-retardant cable according to claim 4, characterized in that: Balls a (1101) engaged with the slide grooves b (1002) are arranged on both sides of the gaps between the multiple groups of ball-shaped parts, and the ball a (1101) is engaged in the ball-shaped groove holes arranged on the engaging end surface of the annular sheet (11).

7. The anti-interference flame-retardant cable according to claim 5, characterized in that: The spherical part comprises a ball sleeve (1102) connected to the mating end surface of the annular sheet (11) and a sphere b (1103) which is mated in the ball sleeve (1102) and contacts the bottom surface of the slide groove a (1001). Both the sphere b (1103) and the sphere a (1101) are made of metal.

8. The anti-interference flame-retardant cable according to claim 1, characterized in that: The elastic member (9) is arranged on the side wall of the annular seat (10) in a circumferential manner and is used for linearly connecting multiple groups of the annular components (8). The elastic member (9) comprises a connecting seat (901) arranged on the side wall of the annular component (8) and a spring (902) connected between two groups of connecting seats (901).

9. The anti-interference flame-retardant cable according to claim 8, characterized in that: The multiple groups of elastic members (9) are distributed in an inclined mirror-image manner, and the end surface of the connecting seat (901) connecting the spring (902) is an inclined surface.

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