Sleeve type moisture-removing fireproof cable

Abstract

The invention discloses a sleeve type moisture-removing fireproof cable which comprises a heating wire core and a working wire core. The heating wire core comprises an inner conductor, an inner insulating layer arranged on the outer side of the inner conductor and an inner sheath arranged on the outer side of the inner insulating layer; an inner sleeve is also sleeved outside the inner sheath, and the heating wire core is sleeved inside the inner sleeve; an outer sleeve is further arranged outside the inner sleeve, the outer sleeve and the inner sleeve are concentrically arranged, and an annular area is arranged between the inner sleeve and the outer sleeve. According to the device, the outer sleeve is arranged outside the inner sleeve, the annular area is reserved between the two sleeves, and the working wire core is arranged in the annular area, so that when the heating wire core works, generated heat is transferred to the inner sleeve and then transferred to the outer sleeve from the inner sleeve, the working wire core in the annular area can be heated, and the working wire core in the annular area can be heated; and the main sheath can be heated, water vapor in the whole cable can be evaporated, and the structural design is very reasonable.

Description

Technical Field

[0001] The invention relates to the technical field of moisture-removing fireproof cables in cable technology, in particular to a sleeve-type moisture-removing fireproof cable. Background Art

[0002] In the prior art, if the cable is used in a basement, corridor, elevator or other harsh environment, water vapor will be generated inside the cable, especially between the layered structure of the cable, and if the water vapor enters the connected equipment, it will have a great impact. In the prior art, there are also many cables for removing water vapor and moisture.

[0003] For example: "A moisture-proof cable and its preparation method" disclosed in the publication (announcement) number: CN112289493A, this technical solution involves the field of data transmission cables. The moisture-proof cable includes: a sheath, the sheath is a cylindrical structure, and has a hollow cavity inside, the sheath includes: a moisture-proof layer, the moisture-proof layer is made of LLDPE material, and the moisture-proof layer is located at the outermost layer of the sheath; a fire-resistant layer, the fire-resistant layer is made of low-smoke halogen-free material, and the fire-resistant layer is arranged on the inner side of the moisture-proof layer; a cable core, the cable core is arranged in the cavity, and the cable core includes: a skeleton, the skeleton is a cross, and the end of the skeleton is against the side wall of the fire-resistant layer, dividing the cavity into four accommodating cavities; a twisted pair of wires, and the twisted pair of wires is arranged in the accommodating cavity. The present application adopts LLDPE material to make a moisture-proof layer. LLDPE material continues the excellent moisture-proof performance of LDPE and HDPE materials, and can also play a comprehensive protective role on the internal structure of the cable, and no additional outer sheath is required.

[0004] For example: the "a moisture-proof cable for underground lines" disclosed in the publication (announcement) number: CN112086236A, the technical solution includes a cable outer layer and a core layer, a cavity is provided between the cable outer layer and the core layer, the cable outer layer includes a sheath layer, a moisture-proof layer, a shielding layer and an inner lining layer, and the sheath layer, moisture-proof layer, shielding layer and inner lining layer are distributed from the outside to the inside in sequence, and wrapped layer by layer, the core layer is evenly provided with buffer cavities distributed in a circular array, and the interior of the buffer cavity is penetrated by a wiring harness, and the buffer cavity is provided with a buffer structure for protecting the wiring harness. The structure of the present invention is novel, and compared with traditional cables, the device has a certain degree of moisture-proof and anti-extrusion protection function, which effectively prolongs the service life of the cable and is suitable for popularization and use.

[0005] However, the above technical solutions and the moisture-proof cables in the prior art all use a moisture-proof layer to achieve moisture-proofing, which cannot achieve complete moisture-proofing. In addition, the moisture-proof cables in the prior art need to have certain fire-proofing properties in addition to having good moisture-proofing effects. The prior art uses a fire-proof layer to achieve fire-proofing, and its fire-proofing effect is average.

[0006] Therefore, in order to solve the above problems, it is necessary to develop a sleeve-type moisture-removing and fire-proof cable with a reasonable structure and good moisture-proof and fire-proof effects. Summary of the invention

[0007] The purpose of the present invention is to provide a sleeve-type moisture-removing fireproof cable in view of the shortcomings of the prior art; the technical solution is as follows:

[0008] A sleeve-type moisture-removing fireproof cable, comprising a heating core and a working core; the heating core comprises an inner conductor, an inner insulating layer arranged outside the inner conductor, and an inner sheath arranged outside the inner insulating layer; and an inner sleeve is also sheathed outside the inner sheath, and the inner sleeve sheath sheathes the heating core inside; and an outer sleeve is also arranged outside the inner sleeve, and the outer sleeve is arranged concentrically with the inner sleeve, and an annular area is arranged between the inner sleeve and the outer sleeve, and the working core is correspondingly arranged in the annular area, and the working core is evenly distributed in the annular area, and is sheathed inside the outer sleeve as a whole;

[0009] The outer sleeve is also provided with a wrapping layer on the outside, a shielding layer on the outside, and a total sheath on the outside of the shielding layer; the heating core generates heat when working, and the heat is transferred to the working core in the annular area through the inner sleeve, evaporating the water vapor generated in the working core, and the heat on the inner sleeve is transferred to the outer sleeve, and the water vapor generated in the total sheath is evaporated by the heat of the outer sleeve.

[0010] Furthermore, six working cores are arranged in the annular area.

[0011] Furthermore, the working core includes an outer conductor, an outer insulating layer arranged outside the outer conductor, and an outer sheath arranged outside the outer insulating layer.

[0012] Furthermore, a support plate is installed between the inner sleeve and the outer sleeve, the support plates are evenly distributed in the annular area, and the working core is arranged in the area between adjacent support plates.

[0013] Furthermore, the inner sleeve, outer sleeve and support plate are all made of copper material that is easy to conduct heat.

[0014] Furthermore, a protrusion corresponding to the position of the support plate is provided on the inner wall of the outer sleeve, and a spring groove corresponding to the position of the support plate is provided in the protrusion, a spring member is installed in the spring groove, and the support plate is inserted in the spring groove and presses the spring member inward.

[0015] Furthermore, an arc-shaped support is also provided at the inner end of the support plate, and the arc-shaped support is correspondingly supported on the outer wall of the inner sleeve.

[0016] Furthermore, circular grooves are formed between adjacent protrusions, and the working wire cores are correspondingly arranged in the circular grooves.

[0017] Beneficial effects: The present invention has the following beneficial effects:

[0018] 1) In this device, a heating core is arranged at the innermost position, an inner sleeve is arranged outside the heating core, an outer sleeve is arranged outside the inner sleeve, and an annular area is left between the two sleeves. The working core is arranged in the annular area. When the heating core works, the heat generated is transferred to the inner sleeve, and then from the inner sleeve to the outer sleeve. Not only the working core in the annular area can be heated, but also the total sheath can be heated to evaporate the water vapor inside the entire cable. The structural design is very reasonable.

[0019] 2) In this device, both the inner and outer sleeves are made of copper, so they have good thermal conductivity. Although the heat generated by the heating core can heat the inside of the cable to evaporate water vapor, it is also easy to accumulate heat, which is dangerous. After setting up two sleeves, the heat is easier to dissipate from the outer sleeve, reducing heat accumulation and increasing safety.

[0020] 3) In this device, a support plate is installed in the annular area between the inner sleeve and the outer sleeve. The support plate has two functions: one is to provide support so that the overall cable has better pressure resistance; the other is to provide heat conduction. The support plate itself is made of copper and has good thermal conductivity. Therefore, the heat on the inner sleeve can be transferred to the outer sleeve more conveniently, and then dissipated from the outer sleeve. The structural setting is very ingenious and reasonable.

[0021] 4) The device further provides a mounting structure for a support plate, a protrusion is provided on the inner wall of the inner sleeve, a spring groove is provided inside the protrusion, a spring member is provided in the spring groove, and then the support plate is correspondingly installed in the spring groove, and the spring member is correspondingly pressed. After such a setting, the inner sleeve and the outer sleeve can be elastically connected through the support plate, and there is better buffering capacity between the two. When subjected to external compression, the spring member and the support plate provide better pressure resistance, thereby increasing the pressure resistance of the overall structure. The structural setting is very ingenious and reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the present invention;

[0023] Figure 2 It is a position diagram of the raised portion in the present invention;

[0024] Figure 3 This is a structural diagram of the inner sleeve in the present invention;

[0025] Figure 4 This is a structural diagram of the outer sleeve in the present invention;

[0026] Among them, the heating core 1; the inner conductor 101; the inner insulating layer 102; the inner sheath 103; the working core 2; the outer conductor 201; the outer insulating layer 202; the outer sheath 203; the inner sleeve 3; the outer sleeve 4; the annular area 5; the wrapping layer 6; the shielding layer 7; the overall sheath 8; the support plate 9; the protrusion 10; the spring groove 11; the spring member 12; the arc support 13; the circular groove 14. DETAILED DESCRIPTION

[0027] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0028] like Figure 1 As shown, a sleeve-type moisture-removing fireproof cable comprises a heating core 1 and a working core 2; the heating core 1 comprises an inner conductor 101, an inner insulating layer 102 arranged outside the inner conductor 101, and an inner sheath 103 arranged outside the inner insulating layer 102; and an inner sleeve 3 is also sleeved on the outside of the inner sheath 103, and the inner sleeve 3 sleeves the heating core 1 inside; and an outer sleeve 4 is also arranged on the outside of the inner sleeve 3, and the outer sleeve 4 is arranged cocentrically with the inner sleeve 3, and an annular area 5 is arranged between the inner sleeve 3 and the outer sleeve 4, and the working core 2 is correspondingly arranged in the annular area 5, and the working core 2 is evenly distributed in the annular area 5, and the whole is sleeved inside the outer sleeve 4;

[0029] like Figure 2As shown, a wrapping layer 6 is further provided on the outside of the outer sleeve 4, a shielding layer 7 is provided on the outside of the wrapping layer 6, and a total sheath 8 is provided on the outside of the shielding layer 7; the heating core 1 generates heat when working, and the heat is transferred to the working core 2 in the annular area 5 through the inner sleeve 3, evaporating the water vapor generated in the working core 2, and the heat on the inner sleeve 3 is transferred to the outer sleeve 4, and the water vapor generated in the total sheath 8 is evaporated by the heat of the outer sleeve 4.

[0030] A total of six working cores 2 are arranged in the annular area 5 ; the working core 2 comprises an outer conductor 201 , an outer insulating layer 202 arranged outside the outer conductor 201 , and an outer sheath 203 arranged outside the outer insulating layer 202 .

[0031] A support plate 9 is further installed between the inner sleeve 3 and the outer sleeve 4 . The support plates 9 are evenly distributed in the annular area 5 , and the working core 2 is arranged in the area between adjacent support plates 9 .

[0032] like Figure 3 As shown, the inner sleeve 3, the outer sleeve 4 and the support plate 9 are all made of copper material that is easy to conduct heat.

[0033] The inner wall of the outer sleeve 4 is also provided with a protrusion 10 corresponding to the position of the support plate 9, and the protrusion 10 is also provided with a spring groove 11 corresponding to the position of the support plate 9, and a spring member 12 is correspondingly installed in the spring groove 11, and the support plate 9 is correspondingly inserted in the spring groove 11 and presses the spring member 12 inwardly.

[0034] like Figure 4 As shown, the inner end of the support plate 9 is also provided with an arc support 13, which is correspondingly supported on the outer wall of the inner sleeve 3 through the arc support 13; a circular groove 14 is formed between adjacent protrusions 10, and the working wire core 2 is correspondingly arranged in the circular groove 14.

[0035] The technical solution of the device is first to set a heating core at the innermost position, an inner sleeve is set outside the heating core, an outer sleeve is set outside the inner sleeve, and an annular area is left between the two sleeves. The working core is set in the annular area. When the heating core is working, the heat generated is transferred to the inner sleeve, and then from the inner sleeve to the outer sleeve. Not only can the working core in the annular area be heated, but also the total sheath can be heated to evaporate the water vapor inside the entire cable. The structural design is very reasonable.

[0036] In this device, both the inner sleeve and the outer sleeve are made of copper material, so they have good thermal conductivity. Although the heat generated by the heating core can heat the inside of the cable to evaporate water vapor, it is also easy to accumulate heat and has certain dangers. After two sleeves are set, the heat is easier to dissipate from the position of the outer sleeve, reducing heat accumulation and increasing safety.

[0037] In the present device, a support plate is correspondingly installed in the annular area between the inner sleeve and the outer sleeve. The support plate has two functions: one is to provide support so that the overall cable has better pressure resistance; the other is to provide heat conduction. The support plate itself is made of copper material and has good thermal conductivity. Therefore, the heat on the inner sleeve can be conveniently transferred to the outer sleeve and then dissipated from the outer sleeve. The structural setting is very ingenious and reasonable.

[0038] The device further provides an installation structure of a support plate, a protrusion is provided on the inner wall of the inner sleeve, a spring groove is provided inside the protrusion, a spring member is provided in the spring groove, and then the support plate is correspondingly installed in the spring groove, and the spring member is correspondingly pressed. After such an arrangement, the inner sleeve and the outer sleeve can be elastically connected through the support plate, and there is better buffering capacity between the two. When subjected to external compression, the spring member and the support plate provide better pressure resistance, thereby increasing the pressure resistance of the overall structure. The structural arrangement is very ingenious and reasonable.

[0039] The inner sleeve and the outer sleeve in the device also have good fireproof performance. The design of the two-layer sleeve makes the cable have good fireproof function.

[0040] The above specific implementation is only a preferred embodiment of the present invention and is not intended to limit the implementation of the present invention and the scope of the claims. All equivalent changes and modifications made according to the content of the patent protection scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A sleeve-type moisture-removing fireproof cable, characterized in that: The invention comprises a heating wire core (1) and a working wire core (2); the heating wire core (1) comprises an inner conductor (101), an inner insulating layer (102) arranged outside the inner conductor (101), and an inner sheath (103) arranged outside the inner insulating layer (102); an inner sleeve (3) is also sleeved outside the inner sheath (103), and the heating wire core (1) is sleeved inside the inner sleeve (3); an outer sleeve (4) is also arranged outside the inner sleeve (3), and the outer sleeve (4) is cocentrically arranged with the inner sleeve (3), and an annular region (5) is arranged between the inner sleeve (3) and the outer sleeve (4), and the working wire core (2) is correspondingly arranged in the annular region (5), and the working wire core (2) is evenly distributed in the annular region (5) and is sleeved inside the outer sleeve (4) as a whole; The outer sleeve (4) is further provided with a wrapping layer (6) on the outside, a shielding layer (7) on the outside of the wrapping layer (6), and a general sheath (8) on the outside of the shielding layer (7); the heating core (1) generates heat when working, and the heat is transferred to the working core (2) in the annular area (5) through the inner sleeve (3), evaporating water vapor generated in the working core (2), and the heat on the inner sleeve (3) is transferred to the outer sleeve (4), and the water vapor generated in the general sheath (8) is evaporated by the heat of the outer sleeve (4).

2. A sleeve-type moisture-removing fireproof cable according to claim 1, characterized in that: A total of six working wire cores (2) are arranged in the annular area (5).

3. A sleeve-type moisture-removing fireproof cable according to claim 1, characterized in that: The working wire core (2) comprises an outer conductor (201), an outer insulating layer (202) arranged outside the outer conductor (201), and an outer sheath (203) arranged outside the outer insulating layer (202).

4. A sleeve-type moisture-removing fireproof cable according to claim 1, characterized in that: A support plate (9) is also installed between the inner sleeve (3) and the outer sleeve (4); the support plates (9) are evenly distributed in the annular area (5); and the working wire core (2) is arranged in the area between adjacent support plates (9).

5. A sleeve-type moisture-removing fireproof cable according to claim 4, characterized in that: The inner sleeve (3), the outer sleeve (4) and the support plate (9) are all made of copper material that is easy to conduct heat.

6. A sleeve-type moisture-removing fireproof cable according to claim 5, characterized in that: The inner wall of the outer sleeve (4) is also provided with a protrusion (10) corresponding to the position of the support plate (9), and the protrusion (10) is also provided with a spring groove (11) corresponding to the position of the support plate (9), and a spring member (12) is correspondingly installed in the spring groove (11), and the support plate (9) is correspondingly inserted in the spring groove (11) and presses the spring member (12) inwardly.

7. A sleeve-type moisture-removing fireproof cable according to claim 6, characterized in that: The inner end of the support plate (9) is also provided with an arc-shaped support (13), and the arc-shaped support (13) is correspondingly supported on the outer wall of the inner sleeve (3).

8. The sleeve-type moisture-removing fireproof cable according to claim 6, characterized in that: A circular groove (14) is formed between adjacent protrusions (10), and the working wire core (2) is correspondingly arranged in the circular groove (14).

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