A method for processing cables through a three-hole parallel die

Abstract

The present invention relates to the field of cable technology, and in particular to a method for processing cables through a three-hole parallel die, comprising: twisting multiple strands of thin cables into a cable body through a stranding machine; each twisted cable body passes through an extrusion die, and the insulating material in a molten state is coated on the cable body to form an insulating layer; the insulated cable body passes through a cooling groove to quickly cool and solidify it; an offset component is added to the two cable bodies on both sides, so that the cable bodies on both sides can move when under pressure, thereby avoiding the cable bodies on both sides from being subjected to greater pressure. The beneficial effect of the present invention is that when the edge cable is subjected to external pressure, the pressurized airbag first deforms and absorbs part of the pressure, and then transmits it to the expansion airbag through a gas medium, and the latter expands to further disperse the pressure; the edge cable can be offset into the protective cavity through the closed groove under pressure, thereby avoiding direct contact and reducing possible damage.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a method for processing cables through a three-hole parallel die. Background Art

[0002] As people's demand for electricity increases, and the requirements for power supply stability and efficiency become higher and higher, the traditional single wire can no longer meet current needs. In order to solve these problems, people have developed new types of wires, one of which is called "three-core cable".

[0003] The new cable is made up of three wires laid out side by side, each with its own protective covering, allowing more power to be transmitted in a smaller space.

[0004] However, the cables on both sides of the existing "three-core cable" are in direct contact with the outer sheath of the cable. When the cable is squeezed from the side, the cables on both sides are more likely to be directly affected by the external force, while the core wire in the middle is protected to a certain extent due to the existence of the cables on both sides, reducing the chance of being directly affected by the external force. Summary of the invention

[0005] Some simplifications or omissions may be made in this section and the abstract and title of the present application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] The object of the present invention is to provide a method for processing cables through a three-hole parallel die.

[0007] Therefore, the purpose is to solve the problem that the cables on both sides directly contact the outer sheath of the cables and are therefore more likely to be directly affected by external forces.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for processing cables by a three-hole parallel die, comprising twisting a plurality of thin cables into a cable body by a twisting machine;

[0009] Each twisted cable body passes through an extrusion die, and the molten insulating material is coated on the cable body to form an insulating layer;

[0010] The insulated cable body passes through a cooling tank to quickly cool and solidify;

[0011] Add offset components to the two cable bodies on both sides so that the cable bodies on both sides can move when under pressure, thus avoiding the cable bodies on both sides from being subjected to greater pressure;

[0012] Arrange the three insulated cable bodies from left to right, and wrap them with a layer of outer sheath material through an extruder die;

[0013] After assembly, the finished cable body is inspected for appearance and tested for electrical performance to ensure that it meets relevant standard requirements. The cable is cut to length as needed and then wound and packaged for storage.

[0014] As a preferred solution of the method for processing cables by a three-hole parallel die of the present invention, the cable body includes a middle cable and edge cables symmetrically distributed around the middle cable, and the middle cable and the two edge cables are arranged in parallel.

[0015] As a preferred solution of the method for processing cables by a three-hole parallel die of the present invention, the offset assembly includes an offset mechanism sleeved on the outside of the edge cable and an elastic mechanism sleeved on the outside of the offset mechanism, and the elastic mechanism can be deformed by an external force to drive the offset mechanism to change between a first state and a second state, so as to drive the edge cable to change position;

[0016] Wherein, when the offset mechanism is in the first state, the edge cable is located in the central area of ​​the offset mechanism, and when the offset mechanism is in the second state, the edge cable is not located in the central area of ​​the offset mechanism.

[0017] As a preferred solution of the method for processing cables through a three-hole parallel mold of the present invention, the offset mechanism includes an elastic sheath located at the same axis as the edge cable and two symmetrically distributed deformable sheaths, the ends of the two deformable sheaths that are away from each other are connected to the elastic sheath, and the elastic support layer that supports the edge cable is fixed inside the elastic sheath and the deformable sheath, and the deformable sheath is fixed with an elastic sheet that applies elastic force to the deformable sheath.

[0018] As a preferred solution of the method for processing cables by a three-hole parallel mold of the present invention, a closed groove is provided between the two deformable sheaths, and the closed groove corresponds horizontally to the outer sheath material, a protective cavity is provided on the outer sheath material, and the protective cavity is connected to the closed groove.

[0019] As a preferred solution of the method for processing cables by a three-hole parallel die of the present invention, an expansion airbag is fixedly connected between the elastic sheath and the edge cable, and the expansion airbag is used to push the edge cable toward the protective cavity.

[0020] As a preferred solution of the method for processing cables through a three-hole parallel mold of the present invention, a cavity connected to each other is opened between the elastic sheath and the deformable sheath. When the internal pressure of the cavity reaches a preset range, the deformable sheath will deform and expand to expose the protective cavity.

[0021] As a preferred solution of the method for processing cables by a three-hole parallel die of the present invention, the elastic mechanism comprises a pressurized airbag fixedly connected to the elastic sheath, the pressurized airbag is provided with a notch, the notch corresponds to the deformable sheath, and when the deformable sheath is unfolded, the pressurized airbag does not interfere with the deformable sheath;

[0022] A cavity is provided inside the pressurized airbag, and the cavity is filled with a gas medium. When the cavity is pressurized, the gas medium flows into the cavity to drive the edge cable to unfold and the inflatable airbag to expand.

[0023] As a preferred solution of the method for processing cables through a three-hole parallel mold of the present invention, wherein: a flow control component is used to control the expansion speed of the expansion airbag and the expansion speed of the deformable sheath, and the flow control component includes a first control valve and a second control valve. The first control valve is located at the connection between the expansion airbag and the cavity and is used to limit the gas flow to control the expansion speed of the expansion airbag. The second control valve is located in the cavity and is used to limit the gas flow to control the expansion speed of the deformable sheath.

[0024] As a preferred solution of the method for processing cables by a three-hole parallel die of the present invention, the first control valve comprises a first valve body fixed to the inner wall of the elastic sheath, an annular deformation layer is fixed inside the first valve body, a first air hole for accommodating gas flow is opened in the middle of the annular deformation layer, a flame retardant layer is fixed on the surface of the elastic sheath, and the flame retardant layer and the annular deformation layer are connected to change the inner diameter of the first air hole;

[0025] The second control valve comprises a second valve body fixed to the inner wall of the cavity, an annular elastic layer is fixed to the inner wall of the second valve body, a second air hole is opened in the middle of the annular elastic layer, and the annular elastic layer is subjected to pressure to change the inner diameter of the second air hole.

[0026] The beneficial effects of the method for processing cables through a three-hole parallel mold of the present invention are: when the edge cable is subjected to external pressure, the pressurized airbag first deforms and absorbs part of the pressure, and then transfers it to the expansion airbag through the gas medium, and the latter expands to further disperse the pressure; the edge cable can be deflected into the protective cavity through the closed groove under the action of pressure, thereby avoiding direct contact and reducing possible damage.

[0027] After the flame retardant layer is squeezed, the flame retardant liquid flows into the annular deformation layer, reducing the inner diameter of the first air hole and slowing down the gas flow rate. This helps to control the expansion rate of the inflatable airbag and ensure that the deformation sheath can be deployed at an appropriate speed. This design can also reduce the possible failures caused by too fast or too slow changes in the deformation sheath, thereby improving the reliability of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 creative work. Among them:

[0029] Figure 1 It is a schematic diagram of the overall top view of the method for processing cables through a three-hole parallel die in the present invention.

[0030] Figure 2 It is a schematic diagram of the three-dimensional structure of the cable body in the method of processing the cable by a three-hole parallel die in the present invention.

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the edge cable in the method for processing the cable through a three-hole parallel mold in the present invention.

[0032] Figure 4 It is a schematic diagram of the structure demonstrating the pressure activity of the edge cable in the method for processing the cable through the three-hole parallel mold in the present invention.

[0033] Figure 5 It is a schematic diagram of the cross-sectional structure of the elastic sheath in the method for processing cables through a three-hole parallel die in the present invention.

[0034] Figure 6 The method for processing cables by three-hole parallel mold in the present invention Figure 5 Schematic diagram of the enlarged structure of part A in the middle.

[0035] In the figure:

[0036] 100, extrusion assembly; 101, extrusion die; 102, cable body; 103, outer sheath material;

[0037] 102a, middle cable; 102b, edge cable;

[0038] 103a, protection cavity;

[0039] 200, offset assembly; 201, offset mechanism; 202, elastic mechanism;

[0040] 201a, elastic sheath; 201b, deformable sheath; 201c, elastic supporting layer; 201d, closed groove; 201e, cavity; 201f, inflatable airbag;

[0041] 202a, pressurized airbag; 202b, notch; 202c, cavity;

[0042] 300, flow control assembly; 301, first control valve; 302, second control valve;

[0043] 301a, first valve body; 301b, annular deformation layer; 301c, flame retardant layer;

[0044] 302a, second valve body; 302b, annular elastic layer. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0048] Embodiment 1 is the first embodiment of the present invention, which provides a method for processing cables by a three-hole parallel die, comprising:

[0049] Twisting multiple strands of thin cables into a cable body 102 through a twisting machine;

[0050] Each twisted cable body 102 passes through an extrusion die 101, and the molten insulating material is coated on the cable body 102 to form an insulating layer;

[0051] The insulated cable body 102 passes through a cooling tank to be rapidly cooled and solidified;

[0052] Adding offset components 200 to the two cable bodies 102 on both sides allows the cable bodies 102 on both sides to move when under pressure, thereby preventing the cable bodies 102 on both sides from being subjected to greater pressure;

[0053] Arrange three insulating cable bodies 102 from left to right, and wrap them with a layer of outer sheath material 103 through an extruder extrusion die 101;

[0054] After assembly is completed, the finished cable body 102 is subjected to appearance inspection and electrical performance testing to ensure that it meets the relevant standard requirements, and is cut to length as required, and then wound and packaged for storage.

[0055] Special treatment is added to the outer sides of the two cable bodies 102 on both sides so that the edge cables 102b can move when under pressure, thereby preventing the cable bodies 102 on both sides from being subjected to greater pressure. This design can disperse external forces and reduce stress concentration in specific areas, thereby reducing the risk of cable damage. By reducing the possibility of local damage, the overall service life of the cable can be effectively extended.

[0056] The three cable bodies 102 are arranged in sequence from left to right, and are wrapped with a layer of outer sheath material 103 through an extrusion die 101 to provide additional physical protection.

[0057] Example 2, reference Figure 1-4 This is the second embodiment of the present invention. Different from the previous embodiment, the cable body 102 includes an intermediate cable 102a and edge cables 102b symmetrically distributed around the intermediate cable 102a. The intermediate cable 102a and the two edge cables 102b are arranged in parallel. The offset assembly 200 includes an offset mechanism 201 sleeved on the outside of the edge cable 102b and an elastic mechanism 202 sleeved on the outside of the offset mechanism 201. The elastic mechanism 202 can be deformed by an external force to drive the offset mechanism 201 to change between the first state and the second state to drive the edge cable 102b to change position; wherein, when the offset mechanism 201 is in the first state, the edge cable 102b is located in the central area of ​​the offset mechanism 201, and when the offset mechanism 201 is in the second state, the edge cable 102b is not located in the central area of ​​the offset mechanism 201. The offset mechanism 201 includes an elastic sheath 201a located at the same axis as the edge cable 102b and two symmetrically distributed deformable sheaths 201b, the ends of the two deformable sheaths 201b that are away from each other are connected to the elastic sheath 201a, and elastic supporting layers 201c that support the edge cable 102b are fixed inside the elastic sheath 201a and the deformable sheath 201b, and an elastic sheet that applies elastic force to the deformable sheath 201b is fixed to the deformable sheath 201b.

[0058] The edge cable 102b can change its position as needed, which makes the entire cable more flexible and able to adapt to different usage environments or needs. By adjusting the position of the edge cable 102b, excessive wear of the cable at a specific position can be avoided and the service life of the cable can be extended; the elastic support layer 201c provides additional support and protection for the edge cable; the added elastic sheet can provide restoring elastic force for the deformed sheath 201b; the design of the elastic mechanism 202 enables the cable to return to its original shape even under the action of external force, thereby improving the durability of the overall structure.

[0059] A closed groove 201d is provided between the two deformable sheaths 201b, and the closed groove 201d corresponds horizontally to the outer sheath material 103. A protective cavity 103a is provided on the outer sheath material 103, and the protective cavity 103a is connected to the closed groove 201d. An inflatable airbag 201f is fixedly connected between the elastic sheath 201a and the edge cable 102b, and the inflatable airbag 201f is used to push the edge cable 102b toward the protective cavity 103a. A cavity 201e that is connected to each other is provided between the elastic sheath 201a and the deformable sheath 201b. When the internal pressure of the cavity 201e reaches a preset range, the deformable sheath 201b will deform and expand to expose the protective cavity 103a. The elastic mechanism 202 includes a pressurized airbag 202a fixedly connected to the elastic sheath 201a, and a notch 202b is provided on the pressurized airbag 202a, and the notch 202b corresponds to the deformable sheath 201b. When the deformable sheath 201b is unfolded, the pressurized airbag 202a will not interfere with the deformable sheath 201b; wherein, a cavity 202c is provided inside the pressurized airbag 202a, and the cavity 202c is filled with a gas medium. When the cavity 202c is pressurized, the gas medium will flow into the cavity 201e to drive the edge cable 102b to unfold and the expansion airbag 201f to expand.

[0060] In this embodiment, the extruder extrusion die 101 connects the three cable bodies 102 into one through the outer sheath material 103, which is more tear-resistant than a single cable body 102. However, during use, the edge cables 102b on both sides are more susceptible to external compression, resulting in a shortened service life of the edge cables 102b.

[0061] When the edge cable 102b is squeezed by the outside, the elastic support force of the elastic sheath 201a is strong, so the pressure airbag 202a will be compressed and deformed and contracted, and the gas medium inside the pressure airbag 202a will flow into the cavity 201e under the action of pressure. When the gas medium flows into the deformable sheath 201b, the pressure generated by the gas medium overcomes the elastic force of the elastic sheet, so the closed groove 201d will expand to both sides, exposing the protective cavity 103a, reducing the friction during subsequent movement, such as Figure 4 As shown, the expansion airbag 201f will then expand itself under the inflow of gas medium, and the expanded expansion airbag 201f will push the edge cable 102b to shift, so that the edge cable 102b is temporarily shifted to the protective cavity 103a through the unfolded closed groove 201d, thereby avoiding the edge cable 102b from being damaged by large pressure or destroying the tightness of the internal layer structure distribution of the cable, and effectively improving the pressure resistance and stability of the edge cable 102b.

[0062] When the edge cable 102b is not squeezed by the outside world, the expansion airbag 201f will recover under its own elastic force, thereby pulling the edge cable 102b to recover, so that the inside of the cable has a strong elastic recovery force to recover to the initial state, effectively extending the service life of the cable.

[0063] It should be noted that there are multiple inflatable airbags 201f and pressurized airbags 202a, and each pressurized airbag 202a is connected to the corresponding inflatable airbag 201f. Therefore, when a pressurized airbag 202a is damaged, it will not affect the pressurized airbags 202a in other parts, thereby improving durability.

[0064] In summary, when the edge cable 102b is subjected to external pressure, the pressure-bearing airbag 202a is first deformed and absorbs part of the pressure, and then is transferred to the expansion airbag 201f through the gas medium, and the latter expands to further disperse the pressure.

[0065] The edge cable 102b can be deflected into the protective cavity 103a through the closed groove 201d under pressure, thereby avoiding direct force and reducing damage.

[0066] When the external pressure disappears, the inflatable airbag 201f recovers to its original shape by its own elasticity, and at the same time pulls the edge cable 102b back to the initial position, thereby maintaining the integrity of the cable structure.

[0067] Multiple elastic support layers 201c provide additional support, ensuring that the cable maintains a stable shape even in a dynamic environment.

[0068] The pressurized airbag 202a and the expanded airbag 201f are arranged in pairs and are independent of each other, which means that if one component fails, the other components can still work normally, thereby enhancing the reliability of the overall device.

[0069] The flow of gaseous medium within the system not only helps to disperse the pressure, but also enables the system to self-regulate and maintain the balance of the internal structure in the absence of external interference.

[0070] When the gas medium in the pressurized airbag 202a flows through the cavity 201e and enters the deformable sheath 201b, the closed groove 201d will open, thereby reducing the friction of the edge cable 102b during movement and reducing the possibility of wear. Example

[0071] Reference Figure 4-6, which is the third embodiment of the present invention, and further provides a method for processing cables through a three-hole parallel mold. The flow control assembly 300 is used to control the expansion speed of the expansion airbag 201f and the deployment speed of the deformable sheath 201b. The flow control assembly 300 includes a first control valve 301 and a second control valve 302. The first control valve 301 is located at the connection between the expansion airbag 201f and the cavity 201e to limit the gas flow to control the expansion speed of the expansion airbag 201f. The second control valve 302 is located in the cavity 201e to limit the gas flow to control the deployment speed of the deformable sheath 201b. The first control valve 301 includes a first valve body 301a fixed to the inner wall of the elastic sleeve 201a, an annular deformation layer 301b is fixed inside the first valve body 301a, a first air hole for accommodating gas circulation is opened in the middle of the annular deformation layer 301b, a flame retardant layer 301c is fixed on the surface of the elastic sleeve 201a, the elastic sleeve 201a is made of elastic plastic material, the flame retardant layer 301c and the annular deformation layer 301b are connected to change the inner diameter of the first air hole; wherein, the second control valve 302 includes a second valve body 302a fixed to the inner wall of the cavity 201e, an annular elastic layer 302b is fixed to the inner wall of the second valve body 302a, a second air hole is opened in the middle of the annular elastic layer 302b, and the annular elastic layer 302b is subjected to pressure to change the inner diameter of the second air hole.

[0072] It can be seen from Example 2 that it is necessary to control the expansion and contraction speed of the inflation airbag 201f and the deployment and reeling speed of the deformable sheath 201b. When the deployment or reeling speed of the deformable sheath 201b is not within the preset range, the edge cable 102b will be offset when the deformable sheath 201b is not fully deployed, resulting in greater resistance, or the deformable sheath 201b will be reeled in prematurely, resulting in the inability of the deformable sheath 201b to recover.

[0073] When in a compressed state, the flame retardant layer 301c squeezes the flame retardant liquid inside to flow into the annular deformation layer 301b, and the annular deformation layer 301b expands and deforms, thereby reducing the inner diameter of the first air hole and reducing the flow of gas. At this time, the gas encounters a large resistance at the first control valve 301, so the gas will first pass through the second control valve 302 into the deformation sheath 201b, causing the deformation sheath 201b to unfold first, reducing the friction on the movement of the edge cable 102b.

[0074] When not in a compressed state, the annular deformable layer 301b will recover by relying on its own elastic force, thereby squeezing the flame retardant liquid into the flame retardant layer 301c. Therefore, the inner diameter of the first air hole becomes larger, making the gas flow speed inside the expansion airbag 201f faster, so that the edge cable 102b can recover first. Under the restriction of the annular elastic layer 302b, the gas in the deformable sheath 201b will cause the deformable sheath 201b to recover slowly under the elastic force of the elastic sheet, thereby not interfering with the movement of the edge cable 102b.

[0075] In summary, when the device is in a compressed state, the deformable sheath 201b will be unfolded first, which can reduce the friction between the edge cable 102b and the surroundings and reduce the risk of damage to the cable due to friction.

[0076] When not under pressure, the deformable sheath 201b can be rolled up relatively slowly, and at the same time, the annular elastic layer 302b ensures that the rolling process proceeds smoothly.

[0077] After the flame retardant layer 301c is squeezed, the flame retardant liquid flows into the annular deformable layer 301b, reducing the inner diameter of the first air hole and slowing down the gas flow rate, which helps to control the expansion rate of the inflatable airbag 201f and ensure that the deformable sheath 201b can be deployed at an appropriate speed.

[0078] The flame retardant layer 301c can further enhance the fire resistance.

[0079] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to a variety of modifications that still fall within the scope of the appended claims.

[0080] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0081] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0082] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for processing cables by a three-hole parallel die, characterized in that: include, Twisting a plurality of thin cables into a cable body (102) by a twisting machine; Each twisted cable body (102) passes through an extrusion die (101), and the insulating material in a molten state is coated on the cable body (102) to form an insulating layer; The insulated cable body (102) passes through a cooling tank to be rapidly cooled and solidified; Adding an offset assembly (200) to two cable bodies (102) on both sides allows the cable bodies (102) on both sides to move when under pressure, thereby preventing the cable bodies (102) on both sides from being subjected to greater pressure; Arrange three insulating cable bodies (102) from left to right in sequence, and wrap them with a layer of outer sheath material (103) through an extruder extrusion die (101); After the assembly is completed, the finished cable body (102) is subjected to appearance inspection and electrical performance testing to ensure that it meets the relevant standard requirements, and is cut to length as required, and then wound and packaged for storage; The cable body (102) comprises a middle cable (102a) and edge cables (102b) symmetrically distributed around the middle cable (102a), wherein the middle cable (102a) and the two edge cables (102b) are arranged in parallel; The offset assembly (200) comprises an offset mechanism (201) sleeved on the outside of the edge cable (102b) and an elastic mechanism (202) sleeved on the outside of the offset mechanism (201); the elastic mechanism (202) can be deformed by an external force to drive the offset mechanism (201) to change between a first state and a second state, so as to drive the edge cable (102b) to change position; Wherein, when the offset mechanism (201) is in a first state, the edge cable (102b) is located in a central area of ​​the offset mechanism (201), and when the offset mechanism (201) is in a second state, the edge cable (102b) is not located in the central area of ​​the offset mechanism (201); The offset mechanism (201) comprises an elastic sheath (201a) located at the same axis as the edge cable (102b) and two symmetrically distributed deformable sheaths (201b); the ends of the two deformable sheaths (201b) that are away from each other are both connected to the elastic sheath (201a); elastic support layers (201c) that support the edge cable (102b) are fixed inside the elastic sheath (201a) and the deformable sheath (201b); and an elastic sheet that applies elastic force to the deformable sheath (201b) is fixed to the deformable sheath (201b); A closed groove (201d) is provided between the two deformable sheaths (201b), and the closed groove (201d) corresponds horizontally to the outer sheath material (103); a protective cavity (103a) is provided on the outer sheath material (103), and the protective cavity (103a) is connected to the closed groove (201d); An expansion airbag (201f) is fixedly connected between the elastic sheath (201a) and the edge cable (102b), and the expansion airbag (201f) is used to push the edge cable (102b) toward the protective cavity (103a); A cavity (201e) that is interconnected is provided between the elastic sheath (201a) and the deformable sheath (201b); when the internal pressure of the cavity (201e) reaches a preset range, the deformable sheath (201b) will deform and expand to expose the protective cavity (103a); The elastic mechanism (202) comprises a pressure-bearing airbag (202a) fixedly connected to the elastic sheath (201a); a notch (202b) is provided on the pressure-bearing airbag (202a); the notch (202b) corresponds to the deformable sheath (201b); when the deformable sheath (201b) is unfolded, the pressure-bearing airbag (202a) will not interfere with the deformable sheath (201b); The pressurized airbag (202a) has a cavity (202c) inside, and the cavity (202c) is filled with a gas medium. When the cavity (202c) is pressurized, the gas medium flows into the cavity (201e) to drive the edge cable (102b) to unfold and the inflatable airbag (201f) to expand. The flow control component (300) is used to control the expansion speed of the expansion airbag (201f) and the deployment speed of the deformable sheath (201b). The flow control component (300) comprises a first control valve (301) and a second control valve (302). The first control valve (301) is located at the connection between the expansion airbag (201f) and the cavity (201e) and is used to limit the flow of gas to control the expansion speed of the expansion airbag (201f). The second control valve (302) is located in the cavity (201e) and is used to limit the flow of gas to control the deployment speed of the deformable sheath (201b). The first control valve (301) comprises a first valve body (301a) fixed to the inner wall of the elastic sleeve (201a), an annular deformation layer (301b) is fixed inside the first valve body (301a), a first air hole for accommodating gas flow is opened in the middle of the annular deformation layer (301b), a flame retardant layer (301c) is fixed on the surface of the elastic sleeve (201a), and the flame retardant layer (301c) and the annular deformation layer (301b) are connected to change the inner diameter of the first air hole; The second control valve (302) comprises a second valve body (302a) fixed to the inner wall of the cavity (201e), an annular elastic layer (302b) is fixed to the inner wall of the second valve body (302a), a second air hole is opened in the middle of the annular elastic layer (302b), and the annular elastic layer (302b) is subjected to pressure to change the inner diameter of the second air hole.

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