阅读说明：本技术 一种耐高温变色线缆及其生产工艺 (High-temperature-resistant color-changing cable and production process thereof ) 是由 康传生 于 2021-07-06 设计创作，主要内容包括：本发明提供了一种耐高温变色线缆及其生产工艺,所述线缆包括芯线、包裹在所述芯线外的金属层、设置在所述金属层与芯线之间的耐高温绝缘油与包裹在所述金属层外的显色层,所述芯线上均布有绝缘骨架,所述线缆两端设有堵头。本发明具有如下有益效果：通过金属层内包覆的耐高温绝缘油,采用显色层与堵头密封耐高温绝缘油,使得线缆在三百度的温度状态依旧能持续工作。(The invention provides a high-temperature-resistant color-changing cable and a production process thereof, wherein the cable comprises a core wire, a metal layer wrapped outside the core wire, high-temperature-resistant insulating oil arranged between the metal layer and the core wire and a color development layer wrapped outside the metal layer, insulating frameworks are uniformly distributed on the core wire, and plugs are arranged at two ends of the cable. The invention has the following beneficial effects: the high-temperature-resistant insulating oil is sealed by the color development layer and the plug through the high-temperature-resistant insulating oil coated in the metal layer, so that the cable can continuously work at the temperature of three hundred degrees.)

1. A high temperature resistant cable that discolours which characterized in that: the cable comprises a core wire, a metal layer wrapped outside the core wire, high-temperature-resistant insulating oil arranged between the metal layer and the core wire, and a color development layer wrapped outside the metal layer, wherein insulating frameworks are uniformly distributed on the core wire, and plugs are arranged at two ends of the cable.

2. A high temperature resistant color shifting cable according to claim 1, wherein: the color development layer contains 12-18% of thermochromic microcapsules and 88-82% of PFA.

3. A high temperature resistant color shifting cable according to claim 1, wherein: the high-temperature resistant insulating oil is natural ester insulating oil.

4. A high temperature resistant color shifting cable according to claim 1, wherein: the insulating framework comprises an inner fixing part and outer feet which are circumferentially and uniformly distributed on the inner fixing part, the inner fixing part is clamped outside the core wire, an elastic part is arranged at the joint of the inner fixing part and the outer feet, and the outer feet are tightly attached to the inner side of the metal layer.

5. A high temperature resistant color shifting cable according to claim 1, wherein: the plug is in a step shaft shape, the small end of the plug is clamped on the inner side of the metal layer, the center of the plug is provided with a wire passing hole, and the core wire is clamped into the wire passing hole for fixation.

6. The process for producing a high temperature resistant color-changing cable according to claim 1, wherein: comprises the following steps of;

s1, extruding a core wire: extruding a core wire by using an extruder, cooling, and then cooling, and uniformly clamping the heated insulating framework on the core wire;

s2, extruding a metal layer: extruding by using an extruder to obtain a strip-shaped metal layer, and then bending the metal layer in the width direction to form a circle, wherein the core wire sleeved with the insulating framework in the step S1 penetrates through the center of the metal layer at the same time of the circle bending, so that the outer side of the insulating framework is tightly attached to the metal layer;

s3, extruding a color development layer: mixing 12-18% of thermochromic microcapsules with 88-82% of PFA, heating, stirring, extruding, cutting into granules to obtain thermochromic microcapsule master batches, and extruding the thermochromic microcapsule master batches by an extruder to form a color development layer on the outer side of the metal layer in the step S2;

s4, rolling: winding the cable obtained in the step S3 into a coil with a fixed length, wherein both ends of the coil need to be exposed:

s5, filling insulating oil: and (3) connecting a pipeline at one end of the coil in the step S4 with an oil pump and connecting a pipeline at the other end of the coil with an oil tank, pumping out high-temperature-resistant insulating oil in the oil tank by using the oil pump, filling the high-temperature-resistant insulating oil between the insulating layer and the core wire, then refluxing the high-temperature-resistant insulating oil into the oil tank through the other end of the coil until the oil refluxed into the oil tank has no bubbles, then closing the oil pump, and blocking two ends of the coil by using plugs.

7. The process for producing a high temperature resistant color-changing cable according to claim 6, wherein: in the step S1, the temperature of the core wire is required to be reduced to below-5 ℃, and the insulating framework is heated to 180-220 ℃.

8. The process for producing a high temperature resistant color-changing cable according to claim 6, wherein: the insulating framework and the plugs are formed by hot-pressing PFA master batches.

9. The process for producing a high temperature resistant color-changing cable according to claim 6, wherein: a through-stop valve is arranged on the pipeline connecting the coil and the oil tank in the step S5, and the through-stop valve is closed immediately after the oil pump is closed; then, a pipeline connected with one end of the oil pump is firstly detached, and if the insulating oil is not full, the pipeline is plugged by a plug after being filled manually; then the end connected with the oil tank is removed, and if the insulating oil is not full, the end is plugged by a plug after the insulating oil is filled manually.

10. The process for producing a high temperature resistant color-changing cable according to claim 9, wherein: the plug is tightly wound and fixed by an adhesive tape.

Technical Field

The invention relates to the technical field of high-temperature-resistant cables, in particular to a high-temperature-resistant color-changing cable and a production process thereof.

Background

The cable is a general term for optical cables, electric cables and other articles, has a plurality of purposes, mainly has multiple functions of installation, connection equipment, electric power transmission and the like, and is a common and indispensable device in daily life. The cable generally comprises a cable core and an insulating layer coated outside the cable core, and the cable is used in many occasions.

Common high temperature resistant cable adopts heat-resisting material parcel heart yearn usually, and its highest operating temperature generally is about 200 ℃, if work in the environment that exceeds 200 ℃ will lead to the heat-resisting material softening of parcel heart yearn, and then can't play the function of protection heart yearn, causes the heart yearn to expose, causes accidents such as electric shock.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a high-temperature-resistant color-changing cable and a production process thereof, and aims to enable the cable to have better heat resistance.

According to the embodiment of the invention, the high-temperature-resistant color-changing cable comprises a core wire, a metal layer wrapped outside the core wire, high-temperature-resistant insulating oil arranged between the metal layer and the core wire, and a color development layer wrapped outside the metal layer, wherein insulating frameworks are uniformly distributed on the core wire, and plugs are arranged at two ends of the cable.

Further, the color development layer contains 12-18% of thermochromic microcapsules and 88-82% of PFA.

Further, the high-temperature resistant insulating oil is natural ester insulating oil.

Furthermore, the insulating framework comprises an inner fixing part and outer feet which are circumferentially and uniformly distributed on the inner fixing part, the inner fixing part is clamped outside the core wire, an elastic part is arranged at the joint of the inner fixing part and the outer feet, and the outer feet are tightly attached to the inner side of the metal layer.

Furthermore, the plug is in a step shaft shape, the small end of the plug is clamped on the inner side of the metal layer, a line passing hole is formed in the center of the plug, and the core line is clamped into the line passing hole for fixation.

The production process of the high-temperature-resistant color-changing cable comprises the following steps of;

s1, extruding a core wire: extruding a core wire by using an extruder, cooling, and then cooling, and uniformly clamping the heated insulating framework on the core wire;

s2, extruding a metal layer: extruding by using an extruder to obtain a strip-shaped metal layer, and then bending the metal layer in the width direction to form a circle, wherein the core wire sleeved with the insulating framework in the step S1 penetrates through the center of the metal layer at the same time of the circle bending, so that the outer side of the insulating framework is tightly attached to the metal layer;

s3, extruding a color development layer: mixing 12-18% of thermochromic microcapsules with 88-82% of PFA, heating, stirring, extruding, cutting into granules to obtain thermochromic microcapsule master batches, and extruding the thermochromic microcapsule master batches by an extruder to form a color development layer on the outer side of the metal layer in the step S2;

s4, rolling: winding the cable obtained in the step S3 into a coil with a fixed length, wherein both ends of the coil need to be exposed:

s5, filling insulating oil: and (3) connecting a pipeline at one end of the coil in the step S4 with an oil pump and connecting a pipeline at the other end of the coil with an oil tank, pumping out high-temperature-resistant insulating oil in the oil tank by using the oil pump, filling the high-temperature-resistant insulating oil between the insulating layer and the core wire, then refluxing the high-temperature-resistant insulating oil into the oil tank through the other end of the coil until the oil refluxed into the oil tank has no bubbles, then closing the oil pump, and blocking two ends of the coil by using plugs.

Further, the temperature of the core wire in the step S1 needs to be reduced to below-5 ℃, and the insulating framework is heated to 180-220 ℃.

Furthermore, the insulating framework and the plug are both formed by hot-pressing PFA master batches.

Furthermore, a through-stop valve is arranged on the pipeline connecting the coil and the oil tank in the step S5, and the through-stop valve is closed immediately after the oil pump is closed; then, a pipeline connected with one end of the oil pump is firstly detached, and if the insulating oil is not full, the pipeline is plugged by a plug after being filled manually; then the end connected with the oil tank is removed, and if the insulating oil is not full, the end is plugged by a plug after the insulating oil is filled manually.

Furthermore, the plug is tightly wound and fixed by an adhesive tape.

The technical principle of the invention is as follows: adopt high temperature resistant insulating oil to insulate the heart yearn, contrast solid-state heat-resisting material, high temperature resistant insulating oil has more outstanding heat resistance, adopt the metal level cladding to live high temperature resistant insulating oil, avoid the cable to receive the striking to break, lead to high temperature resistant insulating oil to reveal, and the end cap cooperation at chromogenic layer and both ends is sealed high temperature resistant insulating oil in the cable, and insulating skeleton plays and lets the heart yearn put at the central point of metal level all the time, increases intensity for whole cable simultaneously.

Compared with the prior art, the invention has the following beneficial effects: the high-temperature-resistant insulating oil is sealed by the color development layer and the plug through the high-temperature-resistant insulating oil coated in the metal layer, so that the cable can continuously work at the temperature of three hundred degrees.

Drawings

Fig. 1 is a cross-sectional view of a high temperature resistant color-changing cable according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a high temperature resistant color change cable according to an embodiment of the present invention.

Fig. 3 is a process flow diagram of the high temperature resistant color-changing cable according to the embodiment of the invention.

Fig. 4 is a schematic diagram of a coil structure of a high temperature resistant color-changing cable according to an embodiment of the invention.

Fig. 5 is a schematic view of an oil path structure filled with insulating oil according to an embodiment of the present invention.

Fig. 6 is a schematic view of a plug structure of the high temperature resistant color-changing cable according to the embodiment of the invention.

In the above drawings: 100. a cable; 110. a core wire; 120. a metal layer; 121. high temperature resistant insulating oil; 130. a color development layer; 140. an insulating framework; 141. an inner fixing portion; 142. an outer foot; 143. an elastic portion; 150. a plug; 151. a wire passing hole; 200. coiling the wire; 300. an oil tank; 310. an oil pump; 320. a pipeline; 321. and (4) a through valve.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments.

The high temperature resistant color-changing cable shown in fig. 1-2 comprises a core wire 110, a metal layer 120 wrapped outside the core wire 110, high temperature resistant insulating oil 121 arranged between the metal layer 120 and the core wire 110, and a color development layer 130 wrapped outside the metal layer 120, wherein the core wire 110 is provided with uniformly distributed insulating frameworks 140 in interference fit, two ends of the cable 100 are fixed with plugs 150, the insulating frameworks 140 and the plugs 150 are both formed by hot pressing of PFA master batches, the melting point of PFA is 580 ℃, and the sealing of the high temperature resistant insulating oil 121 can still be ensured at 300 ℃.

As shown in fig. 1, the insulating frame 140 includes an inner fixing portion 141 and outer legs 142 circumferentially and uniformly distributed on the inner fixing portion 141, the inner fixing portion 141 is clamped outside the core wire 110 by interference fit, an elastic portion 143 is disposed at a connection portion of the inner fixing portion 141 and the outer legs 142, the inner fixing portion 141, the outer legs 142 and the elastic portion 143 are integrally formed, and the outer legs 142 are tightly attached to the inner side of the metal layer 120.

As shown in fig. 2, the plug 150 is in a stepped shaft shape, the small end of the plug 150 is clamped inside the metal layer 120, the center of the plug 150 is provided with a wire passing hole 151, and the core wire 110 is clamped into the wire passing hole 151 for fixing, thereby playing a role in sealing.

The specific color development layer 130 contains 12-18% of thermochromic microcapsules and 88-82% of PFA, so that the color development layer 130 can be discolored after the temperature rises to a specific value, a technician can know the current approximate temperature of the cable 100, and the high-temperature resistant insulating oil 121 is natural ester insulating oil.

The production process of the high temperature resistant color-changing cable shown in fig. 3 comprises;

s1, extruding a core wire: and extruding the core wire by using an extruder, cooling, and then cooling, wherein the cooling temperature is below-5 ℃, the heated insulating framework is uniformly clamped on the core wire, and the heating temperature of the specific insulating framework is 180-220 ℃, so that the insulating framework and the core wire are still in interference fit under the condition that the temperature of the cable reaches 300 ℃.

S2, extruding a metal layer: and extruding by using an extruder to obtain a strip-shaped metal layer, and then bending the metal layer in the width direction to form a circle, wherein the core wire sleeved with the insulating framework in the step S1 penetrates through the center of the metal layer at the same time, so that the outer side of the insulating framework is tightly attached to the metal layer.

S3, extruding a color development layer: mixing 12-18% of thermochromic microcapsules with 88-82% of PFA, heating, stirring, extruding, cutting into granules to obtain thermochromic microcapsule master batches, and extruding the thermochromic microcapsule master batches by an extruder to form a color development layer on the outer side of the metal layer in the step S2.

S4, rolling: the cable obtained in step S3 is wound into a coil 200 of a fixed length, and both ends of the coil 200 need to be exposed, as shown in fig. 4.

S5, filling insulating oil: connecting a pipeline 320 at one end of the coil 200 in the step S4 with an oil pump 310, connecting a pipeline 320 at the other end of the oil pump 310 with the oil tank 300, pumping out high-temperature-resistant insulating oil in the oil tank 300 by using the oil pump 310, filling the high-temperature-resistant insulating oil between the insulating layer and the core wire, then returning the high-temperature-resistant insulating oil into the oil tank 300 through the other end of the coil 200 until the oil returned into the oil tank 300 has no bubble, namely the inside of the cable 100 is filled with the high-temperature-resistant insulating oil, then closing the oil pump 310, plugging both ends of the coil by using a plug, and specifically, connecting the coil 200 with the pipeline 320 of the oil tank 300 by using a check valve 321, wherein a specific oil path is shown in fig. 5; immediately after the oil pump 310 is turned off, the on-off valve 321 is closed; then the pipeline 320 connected with the oil pump 310 is firstly detached, and if the insulating oil is not full, the pipeline is plugged by a plug after being filled manually; and then the end connected with the oil tank 300 is detached, if the insulating oil is not full, the end is plugged by a plug after being filled manually, and the plug is wound and fixed by an adhesive tape to avoid the separation of the plug.

During the use, measure the cable length that needs, decide reel 200, decide the back and will decide the vertical placing of department fast, avoid high temperature resistant insulating oil to flow in a large number, high temperature resistant insulating oil is poured into to the one end of surplus reel 200, replenishes the high temperature resistant insulating oil that just flows out to plug up again with the end cap.

As shown in fig. 6, in the used cable 100, the metal layer 120 and the color development layer 130 at two ends are removed in sequence, so that the core wire 110 protrudes out, and then is blocked by the plug 150, and the core wire 110 passes through the wire passing hole 151 to be exposed, so as to be conveniently connected with other cables or equipment, and before the plug 150 is used, high temperature resistant insulating oil needs to be supplemented.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.