CN210429364U

CN210429364U - Low-temperature-resistant cable

Info

Publication number: CN210429364U
Application number: CN201921815684.5U
Authority: CN
Inventors: 解高峰; 张勇; 于会建; 解奔峰
Original assignee: Shanxi Jinguangfeng Cable Co Ltd
Current assignee: Shanxi Jinguangfeng Cable Co Ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-04-28
Anticipated expiration: 2029-10-28

Abstract

The utility model relates to an anti low temperature cable, including the conductor, the conductor extrudees the polyimide insulating layer outward and becomes insulating core, the outer cladding of insulating core has anti low temperature layer, anti low temperature layer from interior to exterior includes pearly-lustre sand one-level composite filling layer, waterproof canvas around the covering, pearly-lustre sand second grade composite filling layer, polyimide band layer, the outer crowded package of anti low temperature layer has the polyimide sheath, pearly-lustre sand has the low coefficient of thermal conductivity, the stable characteristics of chemical property, use pearly-lustre sand one-level composite filling layer and pearly-lustre sand second grade composite filling layer can make the difficult heat dissipation of conductor temperature to external low temperature environment, so can guarantee the normal work of conductor and the safety of corresponding polyimide insulating layer, polyimide performance is stable in addition, can adapt to ultra-low temperature environment and insulating properties is good, guarantee the security of insulating core, the design of anti low temperature layer can very big, the service life of the cable is facilitated.

Description

Low-temperature-resistant cable

Technical Field

The utility model relates to a cable manufacturing technical field especially relates to an anti cryogenic cable.

Background

With the economic development, the modern construction and the industrial progress of China, the requirement on the technical level of industrial equipment is higher and higher. Particularly in high and cold areas, the insulation and the sheath of the cable can crack, so that accidents such as short circuit, power failure, control misoperation, communication interruption and the like frequently occur, and great harm is caused to the society and personal property. At present, the conventional cable has the environmental temperature of-15 ℃ resistance, the laying temperature of not less than 0 ℃, the fixed laying temperature of the silicon rubber and the fluoroplastic of-60 ℃, and the cable which is lower than-60 ℃ is mainly imported at the present stage, such as the process of preparing liquid nitrogen from air, and the cable for transmitting electric energy and controlling circuits is required to have the temperature of-100 ℃ resistance, so that the cable is currently and freshly produced in China. Therefore, a cryogenic resistant cable is needed to address such problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anti cryogenic cable to above technical problem.

The utility model provides an anti low temperature cable, includes the conductor, the polyimide insulating layer of crowded package becomes the insulation core outside the conductor, the outer cladding of insulation core has anti low temperature layer, anti low temperature layer from interior to exterior includes pearly-lustre sand primary composite filling layer, canvas around the covering, pearly-lustre sand secondary composite filling layer, polyimide band layer, the crowded package of low temperature resistant layer has the polyimide sheath outward.

In one embodiment, the number of the insulated wire cores is three, an elastic rubber strip filling layer is filled between the insulated wire cores, and an insulating cloth is coated outside the elastic rubber strip filling layer.

In one embodiment, a pearl sand filling layer is filled between the insulated wire core and the elastic rubber strip filling layer.

In one embodiment, triangular rubber frameworks are arranged outside the insulated wire core at intervals.

In one embodiment, the triangular rubber frames are spaced 5-10 meters apart.

In conclusion, the low-temperature-resistant cable comprises a conductor, a polyimide insulating layer is extruded outside the conductor to form an insulating wire core, a low-temperature-resistant layer is coated outside the insulating wire core, the low-temperature-resistant layer comprises a first-level composite filling layer of pearlitic sand, a wrapping layer of waterproof canvas, a second-level composite filling layer of pearlitic sand and a polyimide wrapping tape layer from inside to outside, and a polyimide sheath is extruded outside the low-temperature-resistant layer, wherein the pearlitic sand has the characteristics of low heat conductivity coefficient and stable chemical property, and the use of the first-level composite filling layer of pearlitic sand and the second-level composite filling layer of pearlitic sand can ensure that the temperature of the conductor is difficult to dissipate to the external low-temperature environment, so that the normal work of the conductor and the safety of the corresponding polyimide insulating layer can be ensured, in addition, the polyimide performance is stable, the high insulation performance can be adapted to the ultralow, the service life of the cable is facilitated.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

As shown in fig. 1, the low temperature resistant cable comprises a conductor 1, a polyimide insulating layer 2 is extruded outside the conductor 1 to form an insulating wire core, a low temperature resistant layer is coated outside the insulating wire core, the low temperature resistant layer comprises a pearlitic sand primary composite filling layer 3, a waterproof canvas wrapping layer 4, a pearlitic sand secondary composite filling layer 5 and a polyimide wrapping tape layer 6 from inside to outside, and a polyimide sheath 7 is extruded outside the low temperature resistant layer. The pearlife has the characteristics of low heat conductivity coefficient and stable chemical property, and the use of the first-level composite filling layer 3 and the second-level composite filling layer 5 of the pearlife can ensure that the temperature of the conductor 1 is difficult to radiate to the external low-temperature environment, so that the normal work of the conductor 1 and the safety of the corresponding polyimide insulating layer 2 can be ensured. Use canvas around covering 4 between the compound filling layer of pearlite sand one-level 3 and the compound filling layer of pearlite sand second grade 5, do benefit to and alleviate the holistic weight of cable, and make things convenient for the filling of compound filling layer of pearlite sand one-level 3 and the compound filling layer of pearlite sand second grade 5, make the intraformational pearlite sand of anti low temperature enough realize anti low temperature's effect. Polyimide stable performance, and can adapt to the ultra-low temperature environment, therefore polyimide band layer 6 and the polyimide sheath 7 that connect gradually can also have certain guard action to inside cable when ultra-low temperature is insulating.

In one embodiment, the number of the insulated wire cores is three, an elastic rubber strip filling layer 8 is filled among the insulated wire cores, and an insulating cloth 9 is wrapped outside the elastic rubber strip filling layer 8. The elastic adhesive tape filling layer 8 is filled between the insulated wire cores, so that the insulated wire cores are coated conveniently, the stability between the insulated wire cores is facilitated for three insulated wire cores, and the roundness of the outer surface of each insulated wire core is increased when the insulated cloth 9 is coated by the elastic adhesive tape filling layer 8, so that the coating of a low-temperature resistant layer at the back is facilitated.

In one embodiment, a pearl sand filling layer is filled between the insulated wire core and the elastic rubber strip filling layer. That is to say, fill the pearlite sand in the clearance between insulating core and elasticity adhesive tape filling layer, form pearlite sand filling layer. So as to further improve the low temperature resistance effect of the insulated wire core.

In one embodiment, triangular rubber frameworks 10 are arranged outside the insulated wire core at intervals. The triangular rubber framework 10 is favorable for fixing the insulated wire core, is favorable for coating the insulating cloth 9, and can improve the rounding degree of the cable.

In one embodiment, the triangular rubber frames 10 are spaced 5-10 meters apart. The triangular rubber framework 10 is arranged at intervals to facilitate production of the cable, cost is saved, meanwhile, the elastic rubber strip filling layer 8 filled between the insulated wire cores can make up the triangular rubber framework 10, and the problem that the cross section of the cable is inconsistent in size is solved. The distance setting of triangle-shaped rubber skeleton 10 is according to the in-service use position setting of cable, and too closely improved manufacturing cost, too far away is difficult to play the effect of location insulation core.

The above description is only an embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.

Claims

1. A cryogenic resistant cable characterized by: the anti-low-temperature-resistant cable comprises a conductor, wherein a polyimide insulating layer is extruded outside the conductor to form an insulating cable core, an anti-low-temperature layer is coated outside the insulating cable core, the anti-low-temperature layer comprises a pearlitic sand primary composite filling layer, a waterproof canvas winding layer, a pearlitic sand secondary composite filling layer and a polyimide belt layer from inside to outside, and a polyimide sheath is extruded outside the anti-low-temperature layer.

2. A cryogenic-resistant cable according to claim 1, wherein: the insulating sinle silk has three, it has the elasticity adhesive tape filling layer to fill between the insulating sinle silk, the cladding has insulating cloth outside the elasticity adhesive tape filling layer.

3. A cryogenic-resistant cable according to claim 2, wherein: and a pearlitic sand filling layer is filled between the insulated wire core and the elastic adhesive tape filling layer.

4. A cryogenic-resistant cable according to claim 3, wherein: triangular rubber frameworks are arranged outside the insulated wire cores at intervals.

5. The cryogenic cable of claim 4, wherein: the triangular rubber frameworks are spaced by 5-10 meters.