Fireproof soft connecting wire

Abstract

The utility model discloses a fire-resistant flexible connecting line, which relates to the technical field of connecting lines, and comprises a line body mechanism and fire-resistant connectors respectively connected to two ends of the line body mechanism, the outer side of the line body mechanism is connected with a telescopic fire-resistant mechanism, and the telescopic fire-resistant mechanism comprises an organ-type flame-retardant metal hose and a line body locking assembly connected to one end of the organ-type flame-retardant metal hose. The wire body locking assembly comprises a sleeve and a conical locking pipe arranged on the surface of the sleeve in a sleeving mode, at least two receding openings are formed in the end, away from the organ type flame-retardant metal hose, of the sleeve in an annular array mode, a limiting protrusion is arranged between every two adjacent receding openings, and the limiting protrusions are connected to the surface of the sleeve. The surface of the wire body mechanism is protected through the organ-type flame-retardant metal hose, and the organ-type flame-retardant metal hose has certain flexibility, so that the bending effect of the wire body mechanism is ensured, the wire body mechanism can be prevented from being abraded by external scratches, the aging efficiency of the wire body mechanism is reduced, the fire resistance of the wire body mechanism is further improved, and the service life of the wire body mechanism can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting wires, in particular to a fire-resistant soft connecting wire. Background Art

[0002] Fire-resistant flexible connector is an electrical circuit connection device with certain fire-proof performance. Its main function is to expand and seal the cable through fire-proof materials when a fire occurs, so as to prevent the spread of fire and electrical faults, thereby ensuring the continuity of electrical circuits in buildings and their fire-proof performance. Therefore, it is widely used in various electrical circuits that require fire protection, such as fire protection systems in key parts of power plants, chemical industries, tunnels, stations, high-rise buildings, etc. This connection device is of great significance to ensuring personal safety, electrical equipment safety and building safety.

[0003] The following problems exist in the prior art: Although fire-resistant flexible connecting cables are designed to maintain connection functions in extreme environments such as fire, there are differences in the fire resistance of fire-resistant flexible connecting cables of different materials and specifications, which affect the limitations during use. For example, the fire resistance of PVC flexible connecting cables is poor and they are easily affected by fire. In addition, after long-term use, the surface of the connecting cable will be stained, scratched, cracked, aged, etc., which can easily affect the fire resistance and service life of the connecting cable itself. In addition, during use, if the connecting end of the connecting cable and the connector is subjected to excessive mechanical stress, extrusion or twisting, it may cause damage to its surface structure, thereby reducing the fire resistance. Utility Model Content

[0004] The utility model provides a fire-resistant soft connecting wire, which reduces the probability of stains, scratches, cracks, aging and the like on the surface of the connecting wire, improves its fire resistance, and prevents the connecting end of the connector from being damaged by stress, further improving its fire resistance and service life.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A fire-resistant flexible connecting wire, comprising a wire body mechanism and fire-resistant connecting heads respectively connected to both ends thereof, wherein a telescopic fire-proof mechanism is connected to the outer side of the wire body mechanism, and the telescopic fire-proof mechanism comprises an accordion-type flame-retardant metal hose and a wire body locking assembly connected to one end thereof;

[0007] The wire locking assembly includes a sleeve and a conical locking tube mounted on its surface. The sleeve has no less than two clearance openings in a circular array at one end away from the accordion-type flame-retardant metal hose, and a limiting protrusion is provided between two adjacent clearance openings. The limiting protrusion is connected to the surface of the sleeve, and a limiting groove is provided on the inner conical surface of the conical locking tube. When the limiting groove is engaged with the limiting protrusion, the inner side of the sleeve is in close contact with the surface of the wire mechanism.

[0008] A further improvement of the technical solution of the utility model is that: a limiting ring 1 is connected to the surface of the sleeve, a limiting ring 2 is connected to one end of the conical locking tube close to the inner side of the accordion-type flame-retardant metal hose, a clearance is formed between the limiting ring 2 and the limiting groove, the limiting ring 2 is located between the limiting ring 1 and the accordion-type flame-retardant metal hose, and the limiting ring 1 is located on the inner side of the conical locking tube.

[0009] A further improvement of the technical solution of the utility model lies in that: the line body mechanism includes an aluminum sheath and a plurality of conductors connected to the inner side thereof, the surfaces of the conductors are respectively connected with fire-resistant protective sheaths, the surfaces of the fire-resistant protective sheaths are respectively connected with insulating protective sheaths, the aluminum sheath is filled with highly flame-retardant filling strips, the surface of the aluminum sheath is connected with an oxygen-isolating sheath, and the surface of the oxygen-isolating sheath is connected with a low-smoke, halogen-free flame-retardant outer sheath.

[0010] A further improvement of the technical solution of the utility model is that the cross section of the limiting protrusion is arc-shaped.

[0011] A further improvement of the technical solution of the utility model is that the end of the sleeve close to the fire-resistant connector is tapered.

[0012] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0013] 1. The utility model provides a fire-resistant soft connecting wire. The accordion-type flame-retardant metal hose protects the surface of the wire body mechanism, and has a certain expansion and contraction performance. While ensuring the bending effect of the wire body mechanism, it can also prevent it from being scratched and worn by the outside, reduce its aging efficiency, and further improve the fire resistance of the wire body mechanism, and also increase its service life.

[0014] 2. The utility model provides a fire-resistant flexible connecting line. The conical locking tube limits the end of the sleeve, so that the protective effect of the accordion-type flame-retardant metal hose extends all the way to the end of the wire body and the fire-resistant connecting head, and also has a protective effect on the end. At the same time, it can reduce external mechanical stress, extrusion or twisting force, improve the structural strength of the end of the connecting line, and further improve its fire resistance and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the telescopic fire protection mechanism of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the wire mechanism of the utility model.

[0018] In the figure: 10, line body mechanism; 2, fire-resistant connector; 30, telescopic fire-proof mechanism;

[0019] 11. Aluminum sheath; 12. Conductor; 13. Fire-resistant protective sheath; 14. Insulating protective sheath; 15. High flame retardant filling strip; 16. Oxygen isolation sheath; 17. Low smoke halogen-free flame retardant outer sheath;

[0020] 31. Organ-type flame-retardant metal hose; 32. Line locking assembly;

[0021] 321, sleeve; 322, conical locking tube; 323, clearance opening; 324, limiting protrusion; 325, limiting groove; 326, limiting ring 1; 327, limiting ring 2. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the embodiments:

[0023] Example 1

[0024] like Figure 1-3 As shown, the utility model provides a fire-resistant flexible connecting line, including a line body mechanism 10 and fire-resistant connectors 2 respectively connected to both ends thereof, a telescopic fire-proof mechanism 30 is connected to the outer side of the line body mechanism 10, the telescopic fire-proof mechanism 30 includes an accordion-type flame-retardant metal hose 31 and a line body locking assembly 32 connected to one end thereof, the line body locking assembly 32 includes a sleeve 321 and a conical locking tube 322 sleeved on the surface thereof, the sleeve 321 is away from one end of the accordion-type flame-retardant metal hose 31 The annular array is provided with no less than two clearance openings 323, and a limiting protrusion 324 is provided between two adjacent clearance openings 323. The cross-section of the limiting protrusion 324 is arc-shaped, and the limiting protrusion 324 is connected to the surface of the sleeve 321. A limiting groove 325 is provided on the inner conical surface of the conical locking tube 322. When the limiting groove 325 is engaged with the limiting protrusion 324, the inner side of the sleeve 321 is in close contact with the surface of the line body mechanism 10, and the sleeve 321 is conical at one end close to the refractory connector 2.

[0025] Furthermore, the number of the yielding openings 323 is preferably 4, and the end of the sleeve 321 is divided into equal deformation parts, and the inner side of the deformation part can also be provided with anti-slip grooves to improve its limiting effect; when the line body mechanism 10 and the corresponding fire-resistant connector 2 are fixed, the conical locking tube 322 moves along the axial direction of the sleeve 321, and drives the limiting groove 325 to engage with the limiting protrusion 324. As the conical locking tube 322 moves toward the limiting protrusion 324, the inner side of the conical locking tube 322 gradually squeezes the end of the sleeve 321 , so that its end is deformed to clamp and fix the surface of the wire body mechanism 10, which can not only fix the accordion-type flame-retardant metal hose 31, but also protect the ends of the wire body mechanism 10 and the fire-resistant connecting head 2, reduce the mechanical stress, extrusion or twisting force of its end when in use, and improve the structural strength of the connecting line end. At the same time, the accordion-type flame-retardant metal hose 31 protects the surface of the wire body mechanism 10 to prevent it from being scratched and worn by the outside, while further improving the fire resistance of the connecting line, it can also increase its service life.

[0026] Example 2

[0027] like Figure 1-3 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the surface of the sleeve 321 is connected to a limiting ring 1 326, and the conical locking tube 322 is connected to a limiting ring 2 327 at one end close to the inner side of the accordion-type flame-retardant metal hose 31, and a clearance is formed between the limiting ring 2 327 and the limiting groove 325, the limiting ring 2 327 is located between the limiting ring 1 326 and the accordion-type flame-retardant metal hose 31, and the limiting ring 1 326 is located on the inner side of the conical locking tube 322.

[0028] Furthermore, when the accordion-type flame-retardant metal hose 31 is telescopically adjusted, the limit ring 1 326 and the limit ring 2 327 play an anti-slipping role, so that the unlocked sleeve 321 drives the conical locking tube 322 to move together, and also plays an anti-slipping effect on parts when the limit groove 325 and the limit protrusion 324 are not engaged, thereby improving the overall integrity of the telescopic fire protection mechanism 30.

[0029] Example 3

[0030] like Figure 1-3 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the line body mechanism 10 includes an aluminum sheath 11 and a plurality of conductors 12 connected to the inner side thereof, the surfaces of the conductors 12 are respectively connected with fire-resistant protective sheaths 13, the surfaces of the fire-resistant protective sheaths 13 are respectively connected with insulating protective sheaths 14, the aluminum sheath 11 is filled with highly flame-retardant filling strips 15, the surface of the aluminum sheath 11 is connected with an oxygen-isolating sheath 16, and the surface of the oxygen-isolating sheath 16 is connected with a low-smoke halogen-free flame-retardant outer sheath 17.

[0031] Furthermore, the insulating protective cover 14 is a polyester tape, and the insulating protective cover 14 and the oxygen-isolating cover 16 improve the overall insulation performance of the wire body structure 10, while the highly flame-retardant filling strip 15 can reduce electromagnetic interference, keep the wire body structure 10 structurally stable, prevent internal components from shifting or being damaged, and prevent oxygen from contacting combustible materials, thereby reducing heat conduction in the connecting wire. In combination with the fire-resistant protective cover 13 and the low-smoke halogen-free flame-retardant outer sheath 17, the fire resistance of the wire body structure 10 is further improved, the damage to the internal components of the connecting wire caused by fire is reduced, and the spread of flames is suppressed.

[0032] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A fire-resistant flexible connecting wire, comprising a wire body (10) and fire-resistant connecting heads (2) respectively connected to both ends thereof, characterized in that: The outer side of the wire mechanism (10) is connected to a telescopic fire protection mechanism (30), and the telescopic fire protection mechanism (30) comprises an accordion-type flame-retardant metal hose (31) and a wire locking assembly (32) connected to one end thereof; The line locking assembly (32) comprises a sleeve (321) and a conical locking tube (322) sleeved on the surface thereof; at least two clearance openings (323) are provided in a circular array at one end of the sleeve (321) away from the accordion-type flame-retardant metal hose (31); a limiting protrusion (324) is provided between two adjacent clearance openings (323); the limiting protrusion (324) is connected to the surface of the sleeve (321); a limiting groove (325) is provided on the inner conical surface of the conical locking tube (322); when the limiting groove (325) is engaged with the limiting protrusion (324), the inner side of the sleeve (321) is in close contact with the surface of the line mechanism (10).

2. A fire-resistant flexible connecting wire according to claim 1, characterized in that: The surface of the sleeve (321) is connected to a limiting ring 1 (326), and one end of the conical locking tube (322) close to the inner side of the accordion-type flame-retardant metal hose (31) is connected to a limiting ring 2 (327), and a clearance gap is formed between the limiting ring 2 (327) and the limiting groove (325), and the limiting ring 2 (327) is located between the limiting ring 1 (326) and the accordion-type flame-retardant metal hose (31), and the limiting ring 1 (326) is located on the inner side of the conical locking tube (322).

3. A fire-resistant flexible connecting wire according to claim 1, characterized in that: The line body mechanism (10) comprises an aluminum sheath (11) and a plurality of conductors (12) connected to the inner side thereof, the surfaces of the conductors (12) are respectively connected to fire-resistant protective sheaths (13), the surfaces of the fire-resistant protective sheaths (13) are respectively connected to insulating protective sheaths (14), the aluminum sheath (11) is filled with a highly flame-retardant filling strip (15), the surface of the aluminum sheath (11) is connected to an oxygen-isolating sheath (16), and the surface of the oxygen-isolating sheath (16) is connected to a low-smoke, halogen-free, flame-retardant outer sheath (17).

4. The fire-resistant flexible connecting wire according to claim 1, characterized in that: The cross section of the limiting protrusion (324) is arc-shaped.

5. The fire-resistant flexible connecting wire according to claim 1, characterized in that: The sleeve (321) is tapered at one end close to the refractory connector (2).

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