A spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable

Abstract

The utility model belongs to the technical field of fire-resistant cables, specifically a spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable, comprising a cable body, an inner sheath is arranged on the outside of the cable body, an outer sheath is arranged on the outside of the inner sheath, a spring is arranged between the inner sheath and the outer sheath, a flame-retardant layer is molded on the outside of the spring, the inner sheath and the outer sheath are both extruded, and a buffer cavity is formed between the inner sheath and the outer sheath, the spring is located in the buffer cavity between the inner sheath and the outer sheath, and an extruded buffer part is also arranged between the inner sheath and the outer sheath; firstly, an inner sheath and an outer sheath that can be molded by extrusion are arranged, which has the advantages of simple processing technology and low cost, and secondly, the molded buffer groove and the buffer strip cooperate to achieve buffering, which has the advantages of simple structure, high reliability and low cost, and at the same time, a spring is arranged between the inner sheath and the outer sheath to achieve the purpose of increasing the buffering effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of fire-resistant cables, in particular to a spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable. Background Art

[0002] Fire-resistant wires and cables refer to cables that can maintain normal operation for a certain period of time in the event of a wire and cable fire accident while the external flame is still burning, maintaining the integrity of the wire and cable line and the normal operation of the line equipment;

[0003] There is also a special type of cable among fire-resistant cables, called fire-resistant wire and cable. It is made of seamless copper tube as sheath and magnesium oxide as insulation material. Due to the special nature of its materials, fire-resistant wire and cable neither burns nor spreads flames. Experiments have shown that fire-resistant wire and cable can still operate normally at 800-900℃ for 2 hours, and can still operate normally at 1000℃ for 30 minutes.

[0004] After searching, the Chinese patent application (announcement) number CN113674908A proposes a flame-retardant and fire-resistant power cable resistant to spraying and vibration, "including a flame-retardant outer sheath, an outer waterproof belt is arranged inside the flame-retardant outer sheath, a flame-retardant inner sheath is arranged inside the outer waterproof belt, the inner wall of the flame-retardant inner sheath is connected to the anti-vibration component, and the inner side of the anti-vibration component is connected to the conductor, and other technical features; the present invention provides a flame-retardant and fire-resistant power cable resistant to spraying and vibration, with the double-layer waterproofing of the outer waterproof belt and the inner waterproof layer, it can achieve the purpose of long-term use under the state of long-term spraying, the inner ring will move in the radial direction of the outer ring, which will cause a part of the anti-vibration component to be compressed and another part of the anti-vibration component to be stretched, the inner sleeve drives the main shaft to rotate around the center block, and during the rotation of the main shaft, the springs at different positions will be compressed or elongated, so that the spring absorbs the power of vibration and cooperates with the rotation of the main shaft to convert the energy generated by the vibration into potential energy and centrifugal force, so as to quickly absorb the energy and achieve the purpose of vibration prevention, and other technical effects".

[0005] The "limiting ring, center block, main shaft, outer sleeve, inner sleeve, spring" and other components in the patented "anti-vibration component" are used on cables, which requires high molding and processing accuracy, and requires complete assembly and assembly equipment. Obviously, there are defects such as high processing accuracy, cumbersome, difficult assembly and high cost. In addition, the "anti-vibration component" has poor pressure resistance and reliability, and is prone to damage, which affects its service life.

[0006] In order to solve the above problems, the present application proposes a spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable. Utility Model Content

[0007] The utility model aims to provide a spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable, which solves the problems raised in the above-mentioned background technology.

[0008] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0009] The utility model discloses a spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable, comprising a cable body, an inner sheath being arranged outside the cable body, an outer sheath being arranged outside the inner sheath, a spring piece being arranged between the inner sheath and the outer sheath, a flame-retardant layer being formed outside the spring piece, the inner sheath and the outer sheath being both extruded, and a buffer cavity being formed between the inner sheath and the outer sheath, the spring piece being located in the buffer cavity between the inner sheath and the outer sheath, and an extruded buffering member being further arranged between the inner sheath and the outer sheath.

[0010] Furthermore, the buffer member includes a buffer groove formed on the outside of the inner sheath, and a buffer strip formed on the inside of the outer sheath, the buffer grooves and buffer strips are symmetrically grouped in pairs, and multiple groups are equidistantly distributed along the circumference of the cable body.

[0011] Furthermore, the buffer grooves and buffer strips that are symmetrical in pairs are both in an "eight" shape, and one end of the "eight" with a large opening faces the outside of the cable.

[0012] Furthermore, the width of the outer end of the buffer groove is greater than that of the inner end, the width of the front end of the buffer strip is smaller than that of the rear end, and the volume of the buffer strip is greater than the volume of the buffer groove.

[0013] Furthermore, a deformation groove is formed on one side of the buffer strip close to the outer sheath, and the deformation groove is located on the inner side of the "eight" shaped large opening.

[0014] Furthermore, a mounting groove is formed on the outside of the inner sheath, the spring piece is located in the buffer groove, and the outside of the spring piece is supported on the inner side of the outer sheath.

[0015] Furthermore, the spring piece is wavy and arranged along the axial direction of the cable, and the upper and lower intersection points of the wavy shape are supported between the inner sheath and the outer sheath.

[0016] The utility model has the following beneficial effects:

[0017] The inner and outer sheaths of the utility model are both formed by extrusion, and have the advantages of low cost, reliable structure and easy production. At the same time, after the two are extruded and assembled, a buffered activity space is formed;

[0018] The utility model uses the compression of the buffer groove and the buffer strip. Since the front ends of both are smaller than the rear ends, the compression and expansion phenomenon will occur after being compressed. The purpose of buffering is achieved through compression and expansion. The utility model has the advantages of simple structure, high reliability and not easy to be damaged. At the same time, a spring sheet is arranged between the inner sheath and the outer sheath to enhance the buffering effect, and at the same time, it will not affect the bending of the cable.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;

[0022] Figure 2 It is a structural schematic diagram of another perspective of the utility model;

[0023] Figure 3 It is a schematic diagram of the enlarged structure of the inner sheath in the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the enlarged inner and outer sheaths of the utility model;

[0025] Figure 5 It is a structural schematic diagram of the shrapnel in the utility model;

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] In the figure: 1. cable body; 2. inner sheath; 21. buffer groove; 22. mounting groove; 3. outer sheath; 31. buffer strip; 32. deformation groove; 4. spring piece; 5. flame retardant layer. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] See also Figure 1-5 As shown, the utility model is a spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable, comprising a cable body 1, an inner sheath 2 is arranged on the outside of the cable body 1, an outer sheath 3 is arranged on the outside of the inner sheath 2, a spring piece 4 is arranged between the inner sheath 2 and the outer sheath 3, a flame-retardant layer 5 is formed on the outside of the spring piece 4, the inner sheath 2 and the outer sheath 3 are both extruded, and a buffer cavity is formed between the inner sheath 2 and the outer sheath 3, the spring piece 4 is located in the buffer cavity between the inner sheath 2 and the outer sheath 3, and an extruded buffer is also provided between the inner sheath 2 and the outer sheath 3.

[0031] Among them, the buffer part includes a buffer groove 21 formed on the outside of the inner sheath 2, and a buffer strip 31 formed on the inside of the outer sheath 3. The buffer grooves 21 and the buffer strips 31 are symmetrically grouped in pairs, and multiple groups are equidistantly distributed along the circumference of the cable body 1. The combination of the buffer grooves 21 and the buffer strips 31 in this embodiment has the advantages of low processing cost, good durability and reliable structure.

[0032] Among them, the buffer grooves 21 and buffer strips 31 that are symmetrical in pairs are both in the shape of an "eight", and one end of the large opening of the "eight" faces the outside of the cable. In this embodiment, the diameter of the outer sheath 3 is larger than the inner sheath 2, and the "eight" direction can better form support between the inner sheath 2 and the outer sheath 3, playing a buffering role to ensure the reliability of the cable structure.

[0033] Among them, the outer end width of the buffer groove 21 is greater than the inner end, the front end width of the buffer strip 31 is smaller than the rear end, and the volume of the buffer strip 31 is greater than the volume of the buffer groove 21. In this embodiment, through this V-shaped structure, the inserted V-shaped is larger than the inserted V-shaped groove, thereby forming a mutual squeezing buffering effect.

[0034] Among them, a deformation groove 32 is also formed on the side of the buffer strip 31 close to the outer sheath 3, and the deformation groove 32 is located on the inner side of the "eight"-shaped large opening. In this embodiment, the deformation groove 32 provides a buffer space for the buffer strip 31 to bend after being compressed, which is conducive to better cooperation between the buffer strip 31 and the buffer groove 21.

[0035] Among them, a mounting groove 22 is formed on the outside of the inner sheath 2, the spring piece 4 is located in the buffer groove 21, and the outside of the spring piece 4 is supported on the inner side of the outer sheath 3. In this embodiment, the mounting groove 22 ensures the reliability of the connection between the spring piece 4 and the outer sheath 3, and will not affect the performance of the spring piece 4. The mounting grooves 22 are distributed in a circle and are spaced apart from the buffer grooves 21 that are symmetrical in pairs.

[0036] Among them, the spring piece 4 is wavy and arranged along the axial direction of the cable. The upper and lower intersection points of the undulating waves are supported between the inner sheath 2 and the outer sheath 3. The shape and position of the spring piece 4 in this embodiment can buffer the radial pressure on the cable, and at the same time buffer the axial tension, and will not affect the bending of the cable. The spring piece 4 is a plurality of circumferentially distributed ones.

[0037] It can be understood that firstly, an inner sheath 2 and an outer sheath 3 which can be formed by extrusion are provided, which have the advantages of simple processing technology and low cost. Secondly, the buffer groove 21 and the buffer strip 31 are formed to cooperate to achieve buffering, which has the advantages of simple structure, high reliability and low cost. At the same time, a spring piece 4 is provided between the inner sheath 2 and the outer sheath 3 to achieve the purpose of increasing the buffering effect.

[0038] A specific application of this embodiment is: after the cable body 1 is processed and formed, the inner sheath 2, the buffer groove 21, and the installation groove 22 are extruded on the outside thereof; after the inner sheath 2 is cooled, the spring piece 4 is connected to the installation groove 22; then, the buffer strip 31 and the deformation groove 32 are extruded and formed; and the outer sheath 3 is cooled and formed, such as Figure 2 As shown, the buffer groove 21 and the buffer strip 31 are partially inserted, and the buffer groove 21 and the buffer strip 31 are in an overlapping state at this time, and no extrusion force is formed, and the flame retardant layer 5 is coated on the outside of the outer sheath 3;

[0039] When the cable is squeezed from the outside: the buffer strip 31 in the pressure direction is pressed downward and squeezed into the buffer groove 21. After the buffer groove 21 is squeezed, the inner sheath 2 will produce a certain deformation, forcing the buffer groove 21 to expand. At this time, the squeezing force and the elasticity of the inner sheath 2 can have a buffering effect on the cable body 1. The buffer strip 31 will be deformed at a certain angle after being squeezed. The deformation groove 32 is at the angle of the deformation of the buffer strip 31, so that the buffer groove 21 and the buffer strip 31 can better cooperate in buffering. After the cable is compressed, the spring piece 4 will also be compressed. The resilience of the spring piece 4 buffers the pressure on the cable, thereby playing a buffering and protective role on the internal cable body 1.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable, comprising a cable body (1), characterized in that: An inner sheath (2) is arranged outside the cable body (1), an outer sheath (3) is arranged outside the inner sheath (2), a spring piece (4) is arranged between the inner sheath (2) and the outer sheath (3), a flame retardant layer (5) is formed outside the spring piece (4), the inner sheath (2) and the outer sheath (3) are both extruded, and a buffer cavity is formed between the inner sheath (2) and the outer sheath (3), the spring piece (4) is located in the buffer cavity between the inner sheath (2) and the outer sheath (3), and an extruded buffer is also provided between the inner sheath (2) and the outer sheath (3).

2. The spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable according to claim 1, characterized in that: The buffer component comprises a buffer groove (21) formed on the outside of the inner sheath (2), and a buffer strip (31) formed on the inside of the outer sheath (3), wherein the buffer groove (21) and the buffer strip (31) are symmetrically grouped in pairs, and multiple groups are provided along the cable body (1) at equidistant distribution around the circumference.

3. The spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable according to claim 2, characterized in that: The buffer grooves (21) and buffer strips (31) that are symmetrical in pairs are both in an "eight" shape, and one end of the "eight"-shaped large opening faces the outside of the cable.

4. The spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable according to claim 2, characterized in that: The width of the outer end of the buffer groove (21) is greater than that of the inner end, the width of the front end of the buffer strip (31) is smaller than that of the rear end, and the volume of the buffer strip (31) is greater than the volume of the buffer groove (21).

5. The spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable according to claim 3, characterized in that: A deformation groove (32) is also formed on one side of the buffer strip (31) close to the outer sheath (3), and the deformation groove (32) is located on the inner side of the "eight" shaped large opening.

6. The spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable according to claim 1, characterized in that: The inner sheath (2) is externally formed with a mounting groove (22), the spring piece (4) is located in the buffer groove (21), and the outer portion of the spring piece (4) is supported on the inner side of the outer sheath (3).

7. The spray-resistant, vibration-resistant, highly flame-retardant and fire-resistant cable according to claim 6, characterized in that: The spring piece (4) is wavy and arranged along the axial direction of the cable, and the upper and lower intersection points of the wavy shape are supported between the inner sheath (2) and the outer sheath (3).

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