Aerial insulated cable and production process thereof

Abstract

The invention relates to the technical field of cable manufacturing, and particularly discloses an aerial insulated cable and a production process thereof, the aerial insulated cable comprises a conductor, the outer surface of the conductor is fixedly coated with a shielding layer, the outer side of the shielding layer is fixedly coated with an insulating tube, and the outer side of the insulating tube is provided with an outer sheath. The outer surface of the insulating tube is wrapped and supported through the arc-shaped inner surfaces of the limiting tubes and the reinforcing strips, so that the insulating tube is fixed in the outer sheath, the situation that the overall structural stability of the cable is affected due to displacement of the insulating tube in the outer sheath is avoided, the inner surface of the outer sheath is supported through the supporting strips and the reinforcing strips, and the service life of the cable is prolonged. The overall structural strength of the outer sheath can be enhanced, the situation that the normal work of the cable is affected by permanent deformation of the outer sheath is avoided, meanwhile, gaps are formed among the limiting pipes, the supporting strips and the reinforcing strips, heat generated when the cable works can be dissipated, and the phenomenon that the outer sheath swells when the cable works normally is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of cable manufacturing, in particular to an overhead insulated cable and a production process thereof. Background Art

[0002] In the field of cable manufacturing technology, overhead insulated cables have attracted much attention due to their wide application in transmission lines. Traditional overhead insulated cables usually include basic components such as conductors, shielding layers, insulation layers and outer sheaths. When used in outdoor environments, these cables need to have good mechanical strength and stability to resist the influence of the external environment, such as wind, temperature changes, etc.

[0003] However, in practical applications, traditional overhead insulated cables have some problems. For example, the conductor may be displaced inside the cable outer sheath, which will affect the overall structural stability of the cable. In addition, the outer sheath may undergo permanent deformation due to changes in internal pressure during long-term operation, which not only affects the normal operation of the cable, but may also cause the outer sheath to bulge, thereby affecting the service life and safety of the cable. Summary of the invention

[0004] The present invention provides an overhead insulated cable and a production process thereof, which solves the problems mentioned in the above background technology.

[0005] To achieve the above object, the present invention is implemented by the following technical scheme: an overhead insulated cable, comprising a conductor, the outer surface of the conductor is fixedly covered with a shielding layer, the outer side of the shielding layer is fixedly covered with an insulating tube, the outer side of the insulating tube is provided with an outer sheath, and further comprising:

[0006] A supporting mechanism, the supporting mechanism is arranged in the cavity between the insulating tube and the outer sheath, and the supporting mechanism is used to support the insulating tube;

[0007] A connecting mechanism, the connecting mechanism is fixedly connected to two ends of the outer sheath respectively, and the connecting mechanism is used to connect the cable;

[0008] The supporting mechanism comprises a limiting tube, which is arranged as a special-shaped tube, whose cross section is arranged as a sector, whose inner outer surface is arranged as an arc, whose inner outer surface is fitted on the outer surface of the insulating tube, whose middle outer surface away from the insulating tube is fixedly connected with a supporting bar, whose supporting bar is arranged as an arc, whose outer surface is fixedly fitted on the inner surface of the outer sheath, whose curvature is larger than that of the outer surface of the limiting tube away from the insulating tube, whose two ends are symmetrically fixedly connected with reinforcing bars, whose reinforcing bars are arranged as special-shaped bars and whose reinforcing bars are arranged in a folded shape.

[0009] The outer surface of the reinforcement strip near the outer sheath is fixedly attached to the inner surface of the outer sheath, and the outer surface of the reinforcement strip near the insulating tube is fixedly attached to the outer surface of the insulating tube. The curvature of the outer surface of the reinforcement strip near the outer sheath is the same as the curvature of the support strip. The reinforcement strip and the support strip are combined into a circular tube, and two adjacent reinforcement strips are arranged to be fixedly connected. At the same time, the wall thickness at the connection between the two adjacent reinforcement strips is greater than the wall thickness of the reinforcement strip near the limiting tube. The outer surface of the limiting tube near the supporting strip is symmetrically penetrated with heat conduction holes. After the cable is connected through the connecting mechanism, it can be installed overhead for use. When the cable is working normally, the insulating tube containing the conductor is inside the outer sheath and is covered by the circular tube structure formed by the limiting tube, the support strip and the reinforcement strip.

[0010] Preferably, the connecting mechanism includes a first connecting ring, which is fixedly connected to one end of the outer sheath, and the other end of the outer sheath is fixedly connected to a second connecting ring, and the end of the first connecting ring away from the outer sheath is rotatably connected to a clamping ring, the cross-section of the clamping ring is set to be L-shaped, a sealing ring is set at the connection between the clamping ring and the first connecting ring, and damping is set between the clamping ring and the first connecting ring.

[0011] Preferably, a clamping plate is fixedly connected to the inner surface of the clamping ring, and six clamping plates are arranged at fixed intervals around the central axis of the clamping ring; and a clamping strip is fixedly connected to the end of the second connecting ring away from the outer sheath, and six clamping strips are arranged at fixed intervals around the central axis of the second connecting ring.

[0012] Preferably, a gap is reserved between two adjacent snap-in strips, and the snap-in plate can be snap-connected with the snap-in strips through the gap between the two adjacent snap-in strips. When the cable needs to be connected, the first connecting ring and the second connecting ring of the two cable sections can be placed opposite each other, and by moving one of the cable sections, the second connecting ring at its end can be inserted into the first connecting ring.

[0013] Preferably, the end of the clamping ring away from the first connecting ring is fixedly connected to a breathable ring, the cross-section of the breathable ring is set to be V-shaped, the outer side of the breathable ring is fixedly connected to a closed ring, the interior of the closed ring is set to be hollow, the outer surface of the breathable ring is penetrated by air holes, the cross-section of the air holes is set to be V-shaped, and multiple air holes are set at fixed intervals around the central axis of the breathable ring.

[0014] Preferably, a matching groove is provided on the outer surface of the second connecting ring, a matching hole is provided inside the matching groove, the matching hole is arranged through the outer surface of the second connecting ring, and a plurality of matching holes are arranged at fixed intervals around the central axis of the second connecting ring. A pressure ring is fixedly connected to the outer surface of the second connecting ring away from the snap-in strip, the interior of the pressure ring is arranged to be hollow, a fitting ring is slidably inserted into the side of the pressure ring close to the snap-in strip, an extrusion rod is elastically slidably inserted into the interior of the snap-in strip, and the internal cavity of the snap-in strip is connected to the internal cavity of the pressure ring.

[0015] Preferably, a protective ring is fixedly connected to the outer surface of the closed ring close to the clamping ring, the inner surface of the protective ring is arranged in an inclined shape, a gap is reserved between the protective ring and the clamping ring, and the outer surface of the clamping ring on the side away from the first connecting ring is arranged in an inclined shape. When the clamping ring and the second connecting ring are clamped together, the matching groove on the second connecting ring is connected to the internal cavity of the closed ring on the clamping ring. At the same time, since an air hole is provided on the air permeable ring, and the air hole connects the matching groove with the outside world, the matching hole in the matching groove can make the connection between the two cable sections be connected to the outside world through the air hole after the connection between the two cable sections is completed. The cable may be shaken by factors such as wind pressure during daily work. The outer sheath is moved, and because the curvature of the outer side of the limiting tube is smaller than that of the supporting bar, when the outer sheath is shaken by the influence of wind pressure, an extrusion force will be generated on the limiting tube inside the outer sheath, so that the limiting tube will be deformed first under the extrusion of the supporting bar, and then the hot air inside the limiting tube will be squeezed and discharged to the outside through the air holes at the connection between the two cable sections. After the cable is no longer affected by the wind pressure, the cable will reset, so that the interior of the limiting tube will be in a negative pressure state instantly, and then air will be drawn into the outer sheath through the air holes, so that the hot air in the outer sheath will be automatically discharged to the outside when the cable is working normally, which greatly reduces the internal temperature of the outer sheath when the cable is working normally and avoids bulging of the outer sheath.

[0016] A production process for an overhead insulated cable comprises the following steps:

[0017] S1. First, prepare the conductor, shielding layer, polyethylene, outer sheath and nickel-titanium alloy required for production;

[0018] S2, winding the shielding layer in S1 uniformly around the outer surface of the conductor for later use;

[0019] S3, placing the polyethylene in S1 into an extruder, heating and melting it, and extruding it into a tube through the extruder to coat the conductor after the shielding layer is wound in S2;

[0020] S4, shaping the nickel-titanium alloy in S1 into a limit tube, a support bar and a reinforcement bar respectively and placing them for cooling;

[0021] S5, after the shaping and cooling in S4, the limiting tube, the supporting strip and the reinforcing strip are thoroughly cleaned, and the dried limiting tube, the supporting strip and the reinforcing strip are placed in a salt bath and heated for 10 minutes;

[0022] S6, taking out the limiting tube, the supporting strip and the reinforcing strip heated in S5, putting them into cold water for rapid cooling, and taking them out for drying after cooling;

[0023] S7, the position limiting tube, support bar and reinforcement bar processed in S6 are assembled and connected around the conductor coated with polyethylene in S2, and after the connection is completed, an outer sheath is put on to obtain a completed cable.

[0024] The present invention provides an overhead insulated cable and a production process thereof, which has the following beneficial effects:

[0025] 1. The present overhead insulated cable and its production process, the outer surface of the insulating tube is covered and supported by the arc-shaped inner surface of the limiting tube and the reinforcing strip, so that the insulating tube is fixed inside the outer sheath, and the displacement of the insulating tube inside the outer sheath is avoided to affect the overall structural stability of the cable, and the inner surface of the outer sheath is supported by the supporting strip and the reinforcing strip, which can enhance the overall structural strength of the outer sheath, and avoid the permanent deformation of the outer sheath affecting the normal operation of the cable, and at the same time, there are gaps between the limiting tube, the supporting strip and the reinforcing strip, which can dissipate the heat generated by the cable during operation, and avoid the bulging of the outer sheath during normal operation of the cable, and the wall thickness of the connection between the two adjacent reinforcing strips is greater than the wall thickness of the reinforcing strip on the side close to the limiting tube, thereby greatly improving the connection strength of the reinforcing strip connection, avoiding the separation between the two adjacent reinforcing strips and affecting the limiting effect on the insulating tube, and can also enhance the overall structural strength of the outer sheath, avoid excessive deformation of the outer sheath, and improve the overall stability of the cable during operation.

[0026] 2. The present overhead insulated cable and its production process, as the second connecting ring approaches the first connecting ring, the clamping strip on the second connecting ring approaches the first connecting ring and finally enters into the clamping ring at the end of the first connecting ring, so that the clamping plate on the inner surface of the clamping ring enters into the gap between the clamping strips on the second connecting ring. At this time, the clamping ring is rotated, so that the clamping ring drives the clamping plate to rotate, so that the clamping plate rotates and clamps into the clamping strip to complete the connection of the two sections of the cable, which greatly reduces the cumbersomeness of connecting the two sections of the cable, and thus greatly improves the installation speed of the cable, thereby improving the installation efficiency of the staff, and at the same time, by setting damping between the clamping ring and the first connecting ring, the connection strength between the second connecting ring and the clamping ring can be guaranteed, thereby improving the cable installation speed while avoiding the clamping ring and the second connecting ring from being detached during normal operation of the cable, greatly improving the working stability of the present cable.

[0027] 3. The present insulated overhead cable and its production process work in conjunction with the connecting mechanism and the supporting mechanism, and the supporting mechanism replaces the filling layer inside the conventional cable. On the premise of achieving the original function of the filling layer, the cable can also be cooled, which greatly improves the working stability of the cable and prolongs the service life of the cable. At the same time, by setting a protective ring and reserving a small gap between the protective ring and the clamping ring, the amount of rainwater entering the inner side of the clamping ring can be greatly reduced in the rainy season. At the same time, the inner surface of the protective ring is set to an inclined shape, and with the V-shaped air vents, the rainwater can be discharged from the clamping ring. It is extremely difficult to enter the cable through the air hole from any side of the ring, that is, the waterproof effect of the connecting mechanism is maximized under the premise of ensuring the ventilation effect. When the clamping plate and the clamping strip are clamped, the rotation of the clamping plate will also push the extrusion rod to move into the clamping strip, and then the air pressure of the internal cavity of the clamping strip is transmitted to the internal cavity of the sealing ring, thereby generating an outward driving force on the fitting ring, so that the outer surface of the fitting ring is firmly attached to the outer surface of the closed ring, so that the connection is automatically sealed when the two sections of the cable are connected, and the waterproof effect of the cable is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the support mechanism of the present invention;

[0030] Figure 3 It is a schematic diagram of the internal structure of the outer sheath of the present invention;

[0031] Figure 4 It is a schematic diagram of the split structure of the support mechanism of the present invention;

[0032] Figure 5 It is a partial structural schematic diagram of the connecting mechanism of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the clamping ring of the present invention;

[0034] Figure 7 is a schematic structural diagram of the second connecting ring of the present invention;

[0035] Figure 8 It is a structural schematic diagram of the clamping strip of the present invention.

[0036] In the figure: 1. conductor; 2. shielding layer; 3. insulating tube; 4. outer sheath; 5. supporting mechanism; 51. limiting tube; 52. supporting bar; 53. reinforcing bar; 54. thermal conductive hole; 6. connecting mechanism; 61. first connecting ring; 62. second connecting ring; 63. snap ring; 64. sealing ring; 65. snap plate; 66. snap strip; 67. breathable ring; 68. closing ring; 69. breathable hole; 610. matching groove; 611. matching hole; 612. pressure ring; 613. fitting ring; 614. extrusion rod; 615. protective ring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] First embodiment: Figures 1 to 8 As shown, the present invention provides a technical solution: an overhead insulated cable, comprising a conductor 1, the outer surface of the conductor 1 is fixedly covered with a shielding layer 2, the outer side of the shielding layer 2 is fixedly covered with an insulating tube 3, the outer side of the insulating tube 3 is provided with an outer sheath 4, and further comprising:

[0039] A supporting mechanism 5, which is arranged in the cavity between the insulating tube 3 and the outer sheath 4, and is used to support the insulating tube 3;

[0040] A connecting mechanism 6, the connecting mechanism 6 is fixedly connected to both ends of the outer sheath 4, and the connecting mechanism 6 is used to connect the cable;

[0041] The supporting mechanism 5 includes a limiting tube 51, which is configured as a special-shaped tube. The cross-section of the limiting tube 51 is configured as a fan-shaped, the inner outer surface of the limiting tube 51 is configured as an arc shape, and the inner outer surface of the limiting tube 51 is attached to the outer surface of the insulating tube 3. The middle outer surface of the limiting tube 51 away from the insulating tube 3 is fixedly connected with a support bar 52, and the support bar 52 is configured as an arc shape. The outer surface of the support bar 52 is fixedly attached to the inner surface of the outer sheath 4. The curvature of the support bar 52 is larger than the curvature of the outer surface of the limiting tube 51 away from the insulating tube 3. The two ends of the support bar 52 are symmetrically fixedly connected with reinforcement bars 53, and the reinforcement bar 53 is configured as a special-shaped bar. The reinforcement bar 53 is configured as a folded shape.

[0042] The outer surface of the reinforcing strip 53 on the side close to the outer sheath 4 is fixedly attached to the inner surface of the outer sheath 4, and the outer surface of the reinforcing strip 53 on the side close to the insulating tube 3 is fixedly attached to the outer surface of the insulating tube 3. The curvature of the outer surface of the reinforcing strip 53 on the side close to the outer sheath 4 is the same as the curvature of the support strip 52. The reinforcing strip 53 and the support strip 52 are combined into a circular tube shape, and two adjacent reinforcing strips 53 are arranged to be fixedly connected. At the same time, the wall thickness at the connection between the two adjacent reinforcing strips 53 is greater than the wall thickness of the reinforcing strip 53 on the side close to the limiting tube 51. The outer surface of the limiting tube 51 on the side close to the support strip 52 is symmetrically penetrated with heat conduction holes 54.

[0043] During operation, after the cable is connected through the connecting mechanism 6, it can be installed overhead for use. When the cable is working normally, the insulating tube 3 containing the conductor 1 is inside the outer sheath 4 and is covered by the circular tubular structure formed by the limiting tube 51, the support strip 52 and the reinforcing strip 53. The outer surface of the insulating tube 3 is covered and supported by the arc-shaped inner surface of the limiting tube 51 and the reinforcing strip 53, so that the insulating tube 3 is fixed inside the outer sheath 4 to avoid displacement of the insulating tube 3 inside the outer sheath 4 and affect the stability of the overall structure of the cable. The inner surface of the outer sheath 4 is supported by the support strip 52 and the reinforcing strip 53, which can enhance the overall structural strength of the outer sheath 4 and avoid the outer sheath 4 will not cause permanent deformation and affect the normal operation of the cable. At the same time, there is a gap between the limiting tube 51, the supporting strip 52 and the reinforcing strip 53, which can dissipate the heat generated by the cable during operation and avoid the outer sheath 4 from bulging when the cable is operating normally. The wall thickness at the connection between two adjacent reinforcing strips 53 is greater than the wall thickness on the side of the reinforcing strip 53 close to the limiting tube 51, thereby greatly improving the connection strength at the connection between the reinforcing strips 53 and avoiding the separation between the two adjacent reinforcing strips 53 to affect the limiting effect on the insulating tube 3. The overall structural strength of the outer sheath 4 can also be enhanced to avoid excessive deformation of the outer sheath 4 and improve the overall stability of the cable during operation.

[0044] Second embodiment: Figures 1 to 8 As shown, the connecting mechanism 6 includes a first connecting ring 61, which is fixedly connected to one end of the outer sheath 4, and the other end of the outer sheath 4 is fixedly connected to a second connecting ring 62, and the end of the first connecting ring 61 away from the outer sheath 4 is rotatably connected to a clamping ring 63, and the cross-section of the clamping ring 63 is set to be L-shaped, and a sealing ring 64 is set at the connection between the clamping ring 63 and the first connecting ring 61, and a damping is set between the clamping ring 63 and the first connecting ring 61.

[0045] The inner surface of the clamping ring 63 is fixedly connected with a clamping plate 65, and six clamping plates 65 are arranged at fixed intervals around the central axis of the clamping ring 63. The end of the second connecting ring 62 away from the outer sheath 4 is fixedly connected with a clamping strip 66, and six clamping strips 66 are arranged at fixed intervals around the central axis of the second connecting ring 62.

[0046] A gap is reserved between two adjacent clamping strips 66 , and the clamping plate 65 can be clamped with the clamping strips 66 through the gap between the two adjacent clamping strips 66 .

[0047] During operation, when it is necessary to connect the cables, the first connecting ring 61 and the second connecting ring 62 of the two cable sections can be placed opposite each other, and the second connecting ring 62 at the end of one of the cable sections can be moved to be inserted into the first connecting ring 61. As the second connecting ring 62 approaches the first connecting ring 61, the snap-in strip 66 on the second connecting ring 62 approaches the first connecting ring 61 and finally enters into the snap-in ring 63 at the end of the first connecting ring 61, so that the snap-in plate 65 on the inner surface of the snap-in ring 63 enters into the gap between the snap-in strips 66 on the second connecting ring 62. At this time, the snap-in ring 63 is rotated, so that the snap-in ring 63 The clamping plate 65 is driven to rotate, so that the clamping plate 65 rotates and clamps into the clamping strip 66 to complete the connection of the two sections of the cable, which greatly reduces the complexity of connecting the two sections of the cable, and thus greatly improves the installation speed of the cable, thereby improving the installation efficiency of the staff. At the same time, by setting damping between the clamping ring 63 and the first connecting ring 61, the connection strength between the second connecting ring 62 and the clamping ring 63 can be guaranteed, thereby improving the cable installation speed while avoiding the disconnection of the clamping ring 63 and the second connecting ring 62 during normal operation of the cable, greatly improving the working stability of the cable.

[0048] The third embodiment: Figures 1 to 8 As shown, one end of the clamping ring 63 away from the first connecting ring 61 is fixedly connected to a breathable ring 67, the cross-section of the breathable ring 67 is set to be V-shaped, and the outer side of the breathable ring 67 is fixedly connected to a closed ring 68, the interior of the closed ring 68 is set to be hollow, and the outer surface of the breathable ring 67 is penetrated by a breathable hole 69, the cross-section of the breathable hole 69 is set to be V-shaped, and a plurality of breathable holes 69 are set at fixed intervals around the center axis of the breathable ring 67.

[0049] A matching groove 610 is provided on the outer surface of the second connecting ring 62, and a matching hole 611 is provided inside the matching groove 610. The matching hole 611 is set to penetrate the outer surface of the second connecting ring 62, and a plurality of matching holes 611 are set at fixed intervals around the central axis of the second connecting ring 62. A pressure ring 612 is fixedly connected to the outer surface of the second connecting ring 62 away from the clamping strip 66, and the interior of the pressure ring 612 is set to be hollow. A fitting ring 613 is slidably inserted on the side of the pressure ring 612 close to the clamping strip 66, and an extrusion rod 614 is elastically slidably inserted inside the clamping strip 66. The internal cavity of the clamping strip 66 is connected to the internal cavity of the pressure ring 612.

[0050] A protective ring 615 is fixedly connected to the outer surface of the closed ring 68 close to the snap ring 63. The inner surface of the protective ring 615 is arranged to be inclined. A gap is reserved between the protective ring 615 and the snap ring 63. The outer surface of the snap ring 63 away from the first connecting ring 61 is arranged to be inclined.

[0051] During operation, when the clamping ring 63 is clamped with the second connecting ring 62, the matching groove 610 on the second connecting ring 62 is connected to the internal cavity of the closed ring 68 on the clamping ring 63. At the same time, since the breathable ring 67 is provided with a breathable hole 69, and the breathable hole 69 connects the matching groove 610 with the outside world, the matching hole 611 in the matching groove 610 can make the connection between the two sections of the cable be connected to the outside world through the breathable hole 69 after the two sections of the cable are connected. The cable will shake due to factors such as wind pressure during daily operation, and since the curvature of the outer side of the limiting tube 51 is smaller than the curvature of the supporting bar 52, when the outer sheath When the cable is shaken by the wind pressure, an extrusion force is generated on the limiting tube 51 inside the outer sheath 4, so that the limiting tube 51 is deformed first under the extrusion of the support bar 52, and then the hot air inside the limiting tube 51 is squeezed and discharged to the outside through the air vents 69 at the connection between the two cable sections. After the cable is affected by the wind pressure, the cable will reset, so that the inside of the limiting tube 51 is instantly in a negative pressure state, and then air is drawn into the outer sheath 4 through the air vents 69, so that the hot air in the outer sheath 4 is automatically discharged to the outside when the cable is working normally, which greatly reduces the internal temperature of the outer sheath 4 when the cable is working normally, avoiding the external When the sheath 4 bulges, the connecting mechanism 6 and the supporting mechanism 5 are linked to work, and the supporting mechanism 5 replaces the filling layer inside the conventional cable. On the premise of achieving the original function of the filling layer, the heat inside the cable can be dissipated, which greatly improves the working stability of the cable and prolongs the service life of the cable. At the same time, by setting the protective ring 615 and reserving a small gap between the protective ring 615 and the clamping ring 63, the amount of rainwater entering the inner side of the clamping ring 63 can be greatly reduced in the rainy season. At the same time, the inner surface of the protective ring 615 is set to an inclined shape, and with the V-shaped air vent 69, rainwater can be discharged from any part of the clamping ring 63. It is extremely difficult to enter the cable through the air hole 69 from one side, that is, under the premise of ensuring the ventilation effect, the waterproof effect of the connecting mechanism 6 is maximized. When the clamping plate 65 and the clamping strip 66 are clamped, the rotation of the clamping plate 65 will also push the extrusion rod 614 to move into the clamping strip 66, and then the air pressure of the internal cavity of the clamping strip 66 is transmitted to the internal cavity of the sealing ring 64, thereby generating an outward driving force on the fitting ring 613, so that the outer surface of the fitting ring 613 is firmly attached to the outer surface of the closing ring 68, so that the connection is automatically sealed when the two sections of the cable are connected, thereby further improving the waterproof effect of the cable.

[0052] A production process for an overhead insulated cable comprises the following steps:

[0053] S1, first prepare the conductor 1, shielding layer 2, polyethylene, outer sheath 4 and nickel-titanium alloy required for production;

[0054] S2, winding the shielding layer 2 in S1 uniformly around the outer surface of the conductor 1 for later use;

[0055] S3, placing the polyethylene in S1 into an extruder, heating and melting it, and extruding it into a tube through the extruder to coat the conductor 1 after the shielding layer 2 is wound in S2;

[0056] S4, shaping the nickel-titanium alloy in S1 into a limit tube 51, a support bar 52 and a reinforcement bar 53 respectively and placing them for cooling;

[0057] S5, after the shaping and cooling in S4, the limiting tube 51, the support bar 52 and the reinforcing bar 53 are thoroughly cleaned, and the dried limiting tube 51, the support bar 52 and the reinforcing bar 53 are placed in a salt bath and heated for 10 minutes;

[0058] S6, taking out the position limiting tube 51, the support bar 52 and the reinforcing bar 53 which have been heated in S5, putting them into cold water for rapid cooling, and taking them out for drying after the cooling is completed;

[0059] S7, the position limiting tube 51, the support bar 52 and the reinforcing bar 53 processed in S6 are assembled and connected around the conductor 1 after the polyethylene coating in S2, and after the connection is completed, the outer sheath 4 is sleeved to obtain a completed cable.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by... does not exclude the existence of other identical elements in the process, method, article or device including the element".

Claims

1. An overhead insulated cable, comprising a conductor (1), characterized in that: The outer surface of the conductor (1) is fixedly coated with a shielding layer (2), the outer side of the shielding layer (2) is fixedly coated with an insulating tube (3), the outer side of the insulating tube (3) is provided with an outer sheath (4), and further comprises: A supporting mechanism (5), the supporting mechanism (5) being arranged in a cavity between the insulating tube (3) and the outer sheath (4), the supporting mechanism (5) being used to support the insulating tube (3); A connecting mechanism (6), the connecting mechanism (6) being fixedly connected to two ends of the outer sheath (4) respectively, and the connecting mechanism (6) being used for connecting a cable; The support mechanism (5) comprises a position limiting tube (51), the position limiting tube (51) is configured as a special-shaped tube, the cross section of the position limiting tube (51) is configured as a fan-shaped tube, the inner outer surface of the position limiting tube (51) is configured as an arc, the inner outer surface of the position limiting tube (51) is fitted on the outer surface of the insulating tube (3), the middle outer surface of the position limiting tube (51) away from the insulating tube (3) is fixedly connected with a support bar (52), the support bar (52) is configured as an arc, the outer surface of the support bar (52) is fixedly fitted on the inner surface of the outer sheath (4), the curvature of the support bar (52) is larger than the curvature of the outer surface of the position limiting tube (51) away from the insulating tube (3), and the two ends of the support bar (52) are symmetrically fixedly connected with reinforcement bars (53), the reinforcement bar (53) is configured as a special-shaped bar, and the reinforcement bar (53) is configured as a folded shape.

2. An overhead insulated cable according to claim 1, characterized in that: The outer surface of the reinforcing strip (53) on the side close to the outer sheath (4) is fixedly attached to the inner surface of the outer sheath (4), and the outer surface of the reinforcing strip (53) on the side close to the insulating tube (3) is fixedly attached to the outer surface of the insulating tube (3). The curvature of the outer surface of the reinforcing strip (53) on the side close to the outer sheath (4) is the same as the curvature of the support strip (52). The reinforcing strip (53) and the support strip (52) are combined into a circular tube shape, and two adjacent reinforcing strips (53) are arranged to be fixedly connected. At the same time, the wall thickness of the connection between the two adjacent reinforcing strips (53) is greater than the wall thickness of the reinforcing strip (53) on the side close to the limiting tube (51). The outer surface of the limiting tube (51) on the side close to the supporting strip (52) is symmetrically penetrated with heat conduction holes (54).

3. An overhead insulated cable according to claim 2, characterized in that: The connecting mechanism (6) comprises a first connecting ring (61), wherein the first connecting ring (61) is fixedly connected to one end of the outer sheath (4), and the other end of the outer sheath (4) is fixedly connected to a second connecting ring (62). The end of the first connecting ring (61) away from the outer sheath (4) is rotatably connected to a snap ring (63), and the cross-section of the snap ring (63) is set to be L-shaped. A sealing ring (64) is set at the connection between the snap ring (63) and the first connecting ring (61), and a damper is set between the snap ring (63) and the first connecting ring (61).

4. An overhead insulated cable according to claim 3, characterized in that: A clamping plate (65) is fixedly connected to the inner surface of the clamping ring (63), and six clamping plates (65) are arranged at fixed intervals around the central axis of the clamping ring (63). A clamping strip (66) is fixedly connected to the end of the second connecting ring (62) away from the outer sheath (4), and six clamping strips (66) are arranged at fixed intervals around the central axis of the second connecting ring (62).

5. An overhead insulated cable according to claim 4, characterized in that: A gap is reserved between two adjacent clamping strips (66), and the clamping plate (65) is clamped with the clamping strip (66) through the gap between the two adjacent clamping strips (66).

6. An overhead insulated cable according to claim 5, characterized in that: The end of the clamping ring (63) away from the first connecting ring (61) is fixedly connected to a breathable ring (67), the cross section of the breathable ring (67) is set to be V-shaped, the outer side of the breathable ring (67) is fixedly connected to a closed ring (68), the interior of the closed ring (68) is set to be hollow, the outer surface of the breathable ring (67) is penetrated by a breathable hole (69), the cross section of the breathable hole (69) is set to be V-shaped, and a plurality of breathable holes (69) are set at fixed intervals around the central axis of the breathable ring (67).

7. An overhead insulated cable according to claim 6, characterized in that: The outer surface of the second connecting ring (62) is provided with a matching groove (610), and the inside of the matching groove (610) is provided with a matching hole (611). The matching hole (611) is set through the outer surface of the second connecting ring (62), and a plurality of matching holes (611) are set at fixed intervals around the central axis of the second connecting ring (62). The outer surface of the second connecting ring (62) on the side away from the clamping strip (66) is fixedly connected with a pressure ring (612), and the interior of the pressure ring (612) is set to be hollow. The side of the pressure ring (612) close to the clamping strip (66) is slidably inserted with a fitting ring (613), and the interior of the clamping strip (66) is elastically slidably inserted with an extrusion rod (614), and the internal cavity of the clamping strip (66) is connected with the internal cavity of the pressure ring (612).

8. An overhead insulated cable according to claim 7, characterized in that: A protective ring (615) is fixedly connected to the outer surface of the closed ring (68) on the side close to the snap ring (63); the inner surface of the protective ring (615) is arranged to be inclined; a gap is reserved between the protective ring (615) and the snap ring (63); and the outer surface of the snap ring (63) on the side away from the first connecting ring (61) is arranged to be inclined.

9. A production process for an overhead insulated cable, characterized in that: The following steps are involved: S1. First, prepare the conductor (1), shielding layer (2), polyethylene, outer sheath (4) and nickel-titanium alloy required for production; S2, winding the shielding layer (2) in S1 at a uniform speed around the outer surface of the conductor (1) for later use; S3, placing the polyethylene in S1 into an extruder, heating and melting it, and extruding it into a tube through the extruder to coat the conductor (1) after the shielding layer (2) is wound in S2; S4, shaping the nickel-titanium alloy in S1 into a limit tube (51), a support bar (52) and a reinforcement bar (53) respectively and placing them for cooling; S5, after the shaping and cooling in S4, the limiting tube (51), the supporting strip (52) and the reinforcing strip (53) are thoroughly cleaned, and the dried limiting tube (51), the supporting strip (52) and the reinforcing strip (53) are placed in a salt bath and heated for 10 minutes; S6, taking out the position limiting tube (51), the support strip (52) and the reinforcing strip (53) that have been heated in S5, putting them into cold water for rapid cooling, and taking them out for drying after the cooling is completed; S7, the position limiting tube (51), the support bar (52) and the reinforcement bar (53) processed in S6 are assembled and connected around the conductor (1) coated with polyethylene in S2, and after the connection is completed, the outer sheath (4) is put on to obtain a completed cable.

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