Saline-alkali corrosion resistant cable and preparation method thereof

Abstract

The invention discloses a saline-alkaline-corrosion-resistant cable and a preparation method thereof, and relates to the technical field of saline-alkaline-corrosion-resistant cables, the saline-alkaline-corrosion-resistant cable comprises six cable cores, each cable core is composed of a copper stranded wire and a crosslinked polyethylene pipe, the surface of each cable core is fixedly connected with a centering assembly, and the surface of each cable core is fixedly connected with a cable core. The surface of the centering assembly is fixedly connected with a heat shrink tube, and the outer surface of the heat shrink tube is sleeved with a sheath. According to the saline-alkaline corrosion resistant cable and the preparation method thereof, the heat shrink tube is tightly attached to the outer surface of the centering tube after being heated and shrunk, then the heat shrink tube is sleeved with the sheath, the wire core penetrates through the connecting cylinder, the connecting cylinder is fixedly connected with the end face of the sheath through a pin, the communicating tube is fixed by combining the conical half shells, and the half cylinders are fixedly connected by combining. The silica gel coating is injected into the semi-cylinder through the glue injection pipe, and the cable end is coated by the cooled and shaped silica gel coating, so that the problem that the metal wire core is corroded due to the fact that the cable end is easily immersed into liquid is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of salt and alkali corrosion resistant cables, and particularly to a salt and alkali corrosion resistant cable and a preparation method thereof. Background Art

[0002] A power cable is a cable used for transmitting and distributing electric energy. Power cables are commonly used in urban underground power grids, outgoing lines from power stations, internal power supply in industrial and mining enterprises, and underwater transmission lines across rivers and seas. The area covered by cable laying is relatively large and may pass through humid saline-alkali areas. After long-term use, the cable protection pipe will rust, which seriously endangers the cable. The outer sheath of the cable itself contains corrosive acid or alkali compounds. For example, for a viscous impregnated paper insulated cable, a lead or aluminum sheath is wound with an impregnated jute tape. If the impregnating liquid contains substances corrosive to the sheath, it will also cause chemical corrosion. Chinese Patent Publication No.: CN114420346A discloses "A Corrosion Resistant Cable". This patent can improve the corrosion resistance of the cable and extend its service life through the coordinated use of a cable body, a conductor, an outer sheath, and a protection pipe. The outer surface of the outer sheath is sequentially provided with a first anti-corrosion layer, a flame retardant layer, and a second anti-corrosion layer from the inside out. The first anti-corrosion layer uses anti-corrosion paint, the flame retardant layer uses fireproof coating, and the fireproof coating is provided with four to six layers. The second anti-corrosion layer uses bituminous paint. Coating the outer surface of the outer sheath with anti-corrosion paint can improve the corrosion resistance of the cable, using fireproof coating can improve the fireproof function of the cable, and coating the outer surface of the fireproof coating with bituminous paint can further improve the corrosion resistance of the cable.

[0003] For existing salt and alkali corrosion resistant cables and their preparation methods, due to structural design defects, there are problems such as the cable end being easily immersed in liquid, resulting in corrosion of the metal wire core, the protective layer on the cable surface being corroded and aged, causing the protective layer to lose its protective effect, and high temperature causing the cable insulation material to soften, age, and even crack, resulting in a reduction in the service life and safety performance of the cable. Summary of the Invention

[0004] The present invention provides a salt and alkali corrosion resistant cable and a preparation method thereof, which solve the problems mentioned in the above background art.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A salt and alkali corrosion resistant cable includes a wire core, the wire core is composed of a copper stranded wire and a cross-linked polyethylene tube, the number of the wire cores is six, a centering component is fixedly connected to the surface of the wire core, a heat shrinkable tube is fixedly connected to the surface of the centering component, and a sheath is sleeved on the outer surface of the heat shrinkable tube. It further includes:

[0006] A joining mechanism, which is used for the electrical connection between the end face position of the wire core and the equipment and the anti-corrosion sealing of the end face position of the wire core;

[0007] A support mechanism, the support mechanism is sleeved and fixedly installed on the outer surface of the sheath, the support mechanism is used for spacing protection between the sheath and the corrosive substance, the inner side of the support mechanism is fixedly connected to a connecting pipe, and the surface of the connecting pipe is fixedly connected to an air pump;

[0008] A cooling mechanism, which is fixedly mounted on the inner side of the supporting mechanism and is used to quickly remove heat from the surface of the wire core;

[0009] The coupling mechanism comprises a connecting tube, the end face of the connecting tube is fixedly connected with a conical half shell, the end face position of the conical half shell away from the connecting tube is fixedly connected with a baffle plate, the side of the baffle plate away from the conical half shell is fixedly connected with a half cylinder, the surfaces of the half cylinder and the conical half shell are fixedly connected with a glue injection tube, the centering tube is a special-shaped tubular structure made of plastic and rubber particles by hot melting through an extruder, the plastic plate is fixedly installed on the end face position of the centering tube by hot melting gluing, the plastic plate is used to be fixedly connected to the connecting tube, a plurality of wire cores are placed in the recessed position of the centering tube, and then the hemp rope is inserted into the inner side of the centering tube, the heat shrink tube is sleeved on the outside of the centering tube, and the heat shrink tube is heated.

[0010] Preferably, the wire core is stripped near the end face, a gap is provided between the heat shrink tube and the sheath, a glue injection hole is provided on the surface of the sheath, and the stripped end of the wire core extends to the interior of the semi-cylinder.

[0011] Preferably, the end face of the semi-cylinder away from the blocking plate is fixedly connected with a joining plate, a through hole is provided starting from the middle position of the surface of the joining plate, a conductive plate is fixedly connected to the end face of the joining plate, there are two semi-cylinders, and when the two semi-cylinders are relatively fixed, a glue injection cavity is formed with the joining plate, the stripped end of the wire core extends to the interior of the semi-cylinder, the joining plate is fixedly connected to the semi-cylinder, the stripped end of the wire core is in close contact with the inner side surface of the insulating cylinder, the conductive plate is tightly fitted to the stripped end of the wire core for conduction, the rubber ring makes the insulating cylinder in close contact with the end face of the blocking plate, a hole is provided on the surface of the insulating cylinder, and the glue injection tube injects silicone coating into the interior of the semi-cylinder.

[0012] Preferably, an end face of the joining plate away from the conductive plate is fixedly connected with an insulating tube, the end face of the conductive plate is connected with the interior of the insulating tube, and one end of the insulating tube away from the conductive plate is fixedly connected with a rubber ring.

[0013] Preferably, the centering assembly includes a centering tube. A hemp rope is fixedly connected to the inner side surface of the centering tube. A plastic plate is fixedly connected to the end face position of the centering tube. The connecting spiral piece is fixedly installed on the outer surface of the sheath through a pin. The support of the perforated spiral piece keeps the outer surface of the sheath away from the ground, while the support spiral piece is in direct contact with the ground. The sphere reduces the frictional resistance between the support spiral piece and the ground. The contact area between the sheath and the air increases. When the air flow passes through the openings on the surface of the perforated spiral piece, the sheath remains dry and is not prone to water accumulation, making the sheath less likely to be corroded. A gap is provided between the heat shrinkable tube and the sheath for pouring silicone paint.

[0014] Preferably, the support mechanism includes a connecting spiral piece. The inner side surface of the connecting spiral piece is fixedly installed on the outer surface of the sheath. An opening spiral piece is fixedly connected to the outer surface of the connecting spiral piece.

[0015] Preferably, the support mechanism further includes a support spiral piece. The support spiral piece is fixedly installed on the outer surface of the opening spiral piece. A sphere is rollingly connected to the surface of the support spiral piece. A pressing plate is fixedly connected to the position of the support spiral piece close to the sphere. The baffle plate blocks the conical half shell and the half cylinder. The silicone paint is poured separately between the conical half shell and the half cylinder. The pouring and shaping of the conical half shell are used to fix the communicating pipe. The inside of the communicating pipe is communicated with the inside of the air guide pipe. The connection part of the two pipes is arranged inside the conical half shell.

[0016] Preferably, the cooling mechanism includes a cooling pipe. The cooling pipe is fixedly installed on the inner side surface of the support mechanism. A conduit is fixedly connected to the end face position of the cooling pipe. A T-shaped rod is fixedly connected to the surface of the cooling pipe.

[0017] Preferably, the bottom end of the T-shaped rod is fixedly connected to a sealing assembly. A plastic strip is fixedly connected to the surface of the sealing assembly. The cooling mechanism further includes an air guide pipe. The outer surface of the air guide pipe is fixedly installed on the inner side surface of the connecting cylinder.

[0018] Preferably, the sealing assembly includes a necking shell. The necking shell is fixedly installed on the surface of the sheath. A fixing plate is fixedly connected to the upper position of the inner side surface of the necking shell. A guiding slider is fixedly connected to the surface of the fixing plate. The necking shell vertically penetrates downward through the sheath, the heat shrinkable tube and the centering tube. With the filling of the silicone paint, the necking shell is stably positioned. The bottom end of the T-shaped rod passes through the cooling pipe. The T-shaped rod continues to move downward and slides over the guiding slider. The bottom end of the T-shaped rod extends to the rectangular shell. The rectangular shell, the T-shaped rod and the heat conducting plate are all made of heat conducting materials, while the air guide pipe, the plastic pipe and the plastic strip are made of plastic materials. The plastic integral structure is sleeved inside the air guide pipe, making the whole cable easy to bend and improving the anti-bending and cracking ability of the cable.

[0019] Preferably, the sealing assembly further includes a plastic pipe fixedly installed on the inner side of the air guide pipe. A rectangular shell is fixedly connected to the surface of the plastic pipe, and a heat conducting plate is fixedly connected to the surface of the rectangular shell.

[0020] A preparation method of a cable resistant to saline-alkali corrosion includes the following steps:

[0021] Step 1: Manufacturing of conductor cores. At room temperature, a copper rod is drawn into copper wires, the copper wires are heated up and kept warm, and then naturally cooled. The copper wires are stranded in a way of twisting multiple single wires to form a copper stranded wire. A traction machine is used to draw the copper stranded wire to be coated into the interior of an injection extrusion machine to coat a heat-melt cross-linked polyethylene material. After cooling and shaping, a core is formed. Subsequently, multiple cores are manufactured in sequence, and the end face position of the core is peeled.

[0022] Step 2: Installation of centering structure. The centering pipe is a special-shaped tubular structure made by melting plastic and rubber particles through an extrusion machine. A plastic plate is fixedly installed at the end face position of the centering pipe by heat-melt gluing. The plastic plate is used for fixedly connecting with a connecting cylinder. Multiple cores are placed into the concave position of the centering pipe. Subsequently, a hemp rope is stuffed into the inner side of the centering pipe. A heat shrinkable tube is sleeved outside the centering pipe, and the heat shrinkable tube is heated. After the heat shrinkable tube shrinks by heating, it closely adheres to the outer surface of the centering pipe.

[0023] Step 3: Sealing and pouring glue. When two half cylinders are relatively fixed, a glue injection cavity is formed with a joint plate. The peeled end of the core extends into the interior of the half cylinder. The joint plate is fixedly connected with the half cylinder. The peeled end of the core is in close contact with the inner side of the insulating cylinder. A glue injection pipe injects silica gel paint into the interior of the half cylinder. The silica gel paint fills the gap so that the core can be firmly joined with the conductive plate, and corrosive liquids and gases are not likely to corrode the core through the half cylinder.

[0024] Step 4: Installation of cooling structure. The necking shell vertically penetrates downward through the sheath, the heat shrinkable tube and the centering pipe. As the silica gel paint is filled, the necking shell is stably positioned. The bottom end of the T-shaped rod penetrates through the cooling pipe, and the T-shaped rod continues to move downward and slides past the guide slider. The bottom end of the T-shaped rod extends to the rectangular shell. When the bottom end of the T-shaped rod contacts the rectangular shell, a heat expansion and contraction paint is poured into the interior of the necking shell. The paint fully fills the gap between the T-shaped rod and the necking shell, and the joint line between the T-shaped rod and the cooling pipe is welded and sealed.

[0025] The present invention provides a cable resistant to saline-alkali corrosion and its preparation method. It has the following beneficial effects:

[0026] 1. The saline-alkali corrosion-resistant cable and its preparation method. After the heat-shrinkable tube is heated and shrunk, it fits tightly with the outer surface of the centering tube. Subsequently, the sheath is sleeved outside the heat-shrinkable tube. The wire core passes through the connecting cylinder, and the connecting cylinder is fixedly connected to the end face position of the sheath through a pin. The conical half-shells are combined to fix the communicating tube, and the half-cylinders are combined for fixed connection. Silicone paint is injected into the interior of the half-cylinder through the injection tube, and the cable end is coated with the silicone paint after being cooled and shaped, solving the problem that the cable end is prone to liquid immersion, resulting in corrosion of the metal wire core.

[0027] 2. The saline-alkali corrosion-resistant cable and its preparation method. The silicone paint fills the gap, enabling the wire core to be firmly joined with the conductive plate. Corrosive liquids and gases are not easily passed through the half-cylinder to corrode the wire core. When the cable has been used for a long time, after opening the half-cylinder, the silicone inside the half-cylinder is removed and cleaned, and then the injection tube is used for glue filling treatment, making the protection and repair of the wire core easier and more effective.

[0028] 3. The saline-alkali corrosion-resistant cable and its preparation method. The heat-shrinkable tube is provided with holes on its surface, and the silicone paint penetrates through the heat-shrinkable tube and is extruded onto the surface of the centering tube. When the paint is cooled and shaped, the gap between the centering tube and the wire core is fully filled. Multiple wire cores are blocked by the centering tube, and the support of the hemp rope effectively prevents the wire cores from shifting when being extruded. The spiral structure of the connecting spiral sheet makes the sheath easy to be bent and stored, and the bendability enables the cable to adapt to various usage conditions, solving the problem that the protective layer on the cable surface corrodes and ages, resulting in the protective layer being unable to play a protective role.

[0029] 4. The saline-alkali corrosion-resistant cable and its preparation method. When the cable has been used for a long time, to prevent corrosive substances from corroding the silicone, the conical half-shell is opened, cleaned, and then re-injected with silicone paint. The air pump enables the gas inside the air duct and the communicating tube to circulate. There is cooling liquid flowing inside the cooling tube. The bottom end of the T-shaped rod penetrates through the cooling tube and extends to the air duct, and the gas flowing inside the air duct is cooled. The wire cores close to the outside of the air duct are quickly cooled, solving the problem that high temperature will soften, age, and even crack the cable insulation material, resulting in a reduction in the service life and safety performance of the cable.

[0030] 5. The saline-alkali corrosion-resistant cable and its preparation method. When the bottom end of the T-shaped rod contacts the rectangular shell, heat-expandable and cold-shrinkable paint is injected into the necked-down shell. The paint fully fills the gap between the T-shaped rod and the necked-down shell. The T-shaped rod transfers the heat of the air duct to the cooling tube. When the conduit controls the circulation of the cooling liquid inside the cooling tube, the heat of the wire core is quickly carried away, making the cooling efficiency of the wire core higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional view of the overall top of the preparation method of the saline-alkali corrosion-resistant cable of the present invention;

[0032] Figure 2 This is a three-dimensional view of the whole salt and alkali corrosion-resistant cable of the present invention;

[0033] Figure 3 This is a three-dimensional view of the interior of the salt and alkali corrosion-resistant cable of the present invention;

[0034] Figure 4 This is a schematic structural diagram of the whole joint mechanism of the present invention;

[0035] Figure 5 This is a schematic structural diagram of a part of the joint mechanism of the present invention;

[0036] Figure 6 This is a schematic structural connection diagram of the centering component and the joint mechanism of the present invention;

[0037] Figure 7 This is a schematic structural diagram of the support mechanism of the present invention;

[0038] Figure 8 This is a schematic structural diagram of the whole cooling mechanism of the present invention;

[0039] Figure 9 This is a schematic structural diagram of a part of the cooling mechanism of the present invention;

[0040] Figure 10 This is a schematic structural diagram of the sealing component of the present invention.

[0041] In the figure: 1, conductor core; 2, centering component; 21, centering tube; 22, hemp rope; 23, plastic plate; 3, heat shrinkable tube; 4, sheath; 5, joint mechanism; 51, connecting cylinder; 52, conical half shell; 53, partition board; 54, half cylinder body; 55, glue injection tube; 561, joint plate; 562, conductive plate; 563, insulating cylinder; 564, rubber ring; 6, support mechanism; 61, connecting spiral piece; 62, perforated spiral piece; 63, support spiral piece; 64, sphere; 65, pressing plate; 7, cooling mechanism; 71, cooling tube; 72, conduit; 73, sealing component; 731, necking shell; 732, fixing plate; 733, guiding and sliding body; 734, plastic tube; 735, rectangular shell; 736, heat conducting plate; 74, T-shaped rod; 75, air duct; 76, plastic strip; 8, communicating pipe; 9, air pump. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] First Embodiment: As Figures 1-6 shown, the present invention provides a technical solution: a cable resistant to saline-alkali corrosion, including a wire core 1, a joining mechanism 5, a support mechanism 6, and a cooling mechanism 7. The wire core 1 is composed of copper stranded wires and a cross-linked polyethylene tube. There are six wire cores 1. A centering component 2 is fixedly connected to the surface of the wire core 1. The centering component 2 includes a centering tube 21. A hemp rope 22 is fixedly connected to the inner side surface of the centering tube 21. A plastic plate 23 is fixedly connected to the end face position of the centering tube 21. A heat shrinkable tube 3 is fixedly connected to the surface of the centering component 2. A sheath 4 is sleeved on the outer surface of the heat shrinkable tube 3,

[0044] The joining mechanism 5 is used for the conductive connection between the end face position of the wire core 1 and the device and the anti-corrosion sealing of the end face position of the wire core 1. The support mechanism 6 is sleeved and fixedly installed on the outer surface of the sheath 4. The support mechanism 6 is used for the spaced protection between the sheath 4 and the corrosive substances. A communicating pipe 8 is fixedly connected to the inner side surface of the support mechanism 6. An air pump 9 is fixedly connected to the surface of the communicating pipe 8. The cooling mechanism 7 is fixedly installed on the inner side surface of the support mechanism 6. The cooling mechanism 7 is used for the rapid derivation of the heat on the surface of the wire core 1;

[0045] Among them, the joining mechanism 5 includes a connecting cylinder 51. A conical half shell 52 is fixedly connected to the end face of the connecting cylinder 51. A partition plate 53 is fixedly connected to the end face position of the conical half shell 52 away from the connecting cylinder 51. A half cylinder body 54 is fixedly connected to the side of the partition plate 53 away from the conical half shell 52. Glue injection pipes 55 are fixedly connected to the surfaces of both the half cylinder body 54 and the conical half shell 52;

[0046] The position of the wire core 1 near the end face is peeled. A gap is provided between the heat shrinkable tube 3 and the sheath 4. Glue injection holes are provided on the surface of the sheath 4. The peeled end of the wire core 1 extends into the interior of the half cylinder body 54.

[0047] During use, the centering tube 21 is a special-shaped tubular structure made of plastic and rubber particles melted through an extrusion machine. The plastic plate 23 is fixedly installed at the end face position of the centering tube 21 by means of heat fusion gluing. The plastic plate 23 is used for fixedly connecting with the connecting cylinder 51. Multiple wire cores 1 are placed into the recessed position of the centering tube 21. Subsequently, the hemp rope 22 is stuffed into the inner side surface of the centering tube 21. The heat shrinkable tube 3 is sleeved on the outside of the centering tube 21. The heat shrinkable tube 3 is heated. After the heat shrinkable tube 3 is heated and shrunk, it is tightly attached to the outer surface of the centering tube 21. Subsequently, the sheath 4 is sleeved on the outside of the heat shrinkable tube 3. The wire core 1 passes through the connecting cylinder 51. The connecting cylinder 51 is fixedly connected to the end face position of the sheath 4 by a pin. The conical half shells 52 are combined to fix the communicating pipe 8, and the half cylinder bodies 54 are combined and fixedly connected. Silicone paint is injected into the interior of the half cylinder body 54 through the glue injection pipe 55. The cable end position is coated with the silicone paint after being cooled and shaped, solving the problem that the cable end is prone to immersion in liquid, resulting in the corrosion of the metal wire core.

[0048] Second Embodiment: As shown in Figure 4 and Figure 5 , a joint plate 561 is fixedly connected to the end face of the semi-cylindrical body 54 away from the partition plate 53. A through hole starts from the middle position of the surface of the joint plate 561. A conductive plate 562 is fixedly connected to the end face position of the joint plate 561. An insulating cylinder 563 is fixedly connected to the end face of the joint plate 561 away from the conductive plate 562. The end face position of the conductive plate 562 communicates with the inside of the insulating cylinder 563. A rubber ring 564 is fixedly connected to one end of the insulating cylinder 563 away from the conductive plate 562.

[0049] During use, there are two semi-cylindrical bodies 54. When the two semi-cylindrical bodies 54 are relatively fixed, a glue injection cavity is formed with the joint plate 561. The stripped end of the wire core 1 extends into the semi-cylindrical body 54. The joint plate 561 is fixedly connected to the semi-cylindrical body 54. The stripped end of the wire core 1 is in close contact with the inner side surface of the insulating cylinder 563. The conductive plate 562 is in close fit with the stripped end of the wire core 1 for conducting electricity. The rubber ring 564 makes the insulating cylinder 563 in close contact with the end face position of the partition plate 53. The surface of the insulating cylinder 563 is provided with holes. The glue injection pipe 55 injects silicone paint into the semi-cylindrical body 54. The silicone paint fills the gap so that the wire core 1 can be firmly joined with the conductive plate 562. Corrosive liquids and gases are not easy to corrode the wire core 1 through the semi-cylindrical body 54. When the cable has been used for a long time, after opening the semi-cylindrical body 54, the silicone inside the semi-cylindrical body 54 is removed and cleaned, and then the glue injection pipe 55 is used for glue filling treatment, making the protection and repair of the wire core 1 easier and more effective.

[0050] Third Embodiment: As shown in Figure 6 and Figure 7 , the support mechanism 6 includes a connecting spiral piece 61. The inner side surface of the connecting spiral piece 61 is fixedly installed on the outer surface of the sheath 4. An opening spiral piece 62 is fixedly connected to the outer surface of the connecting spiral piece 61. The support mechanism 6 further includes a support spiral piece 63. The support spiral piece 63 is fixedly installed on the outer surface of the opening spiral piece 62. A sphere 64 is rollingly connected to the surface of the support spiral piece 63. A pressing plate 65 is fixedly connected to the position of the support spiral piece 63 close to the sphere 64.

[0051] During use, the connecting spiral piece 61 is fixedly installed on the outer surface of the sheath 4 through a pin. The support of the perforated spiral piece 62 keeps the outer surface of the sheath 4 away from the ground, while the support spiral piece 63 is in direct contact with the ground. The sphere 64 reduces the frictional resistance between the support spiral piece 63 and the ground. The contact area between the sheath 4 and the air increases. When the air flow passes through the openings on the surface of the perforated spiral piece 62, the sheath 4 remains dry and is not prone to water accumulation, making the sheath 4 less likely to be corroded. There is a gap between the heat shrinkable tube 3 and the sheath 4 for pouring silicone paint. The surface of the heat shrinkable tube 3 is provided with holes, and the silicone paint penetrates through the heat shrinkable tube 3 and is extruded onto the surface of the centering tube 21. When the paint cools and solidifies, the gap between the centering tube 21 and the wire core 1 is fully filled. Multiple wire cores 1 are blocked by the centering tube 21, and the support of the hemp rope 22 effectively prevents the wire cores 1 from shifting when being extruded. The spiral structure of the connecting spiral piece 61 makes the sheath 4 easy to be bent and stored, and the bendability enables the cable to adapt to various usage conditions, solving the problem that the protective layer on the surface of the cable corrodes and ages, resulting in the protective layer being unable to play a protective role.

[0052] Fourth Embodiment: As Figures 4-9 shown, the temperature reduction mechanism 7 includes a cooling pipe 71, which is fixedly installed on the inner side surface of the support mechanism 6. A conduit 72 is fixedly connected to the end face position of the cooling pipe 71. A T-shaped rod 74 is fixedly connected to the surface of the cooling pipe 71. A sealing assembly 73 is fixedly connected to the bottom end of the T-shaped rod 74. A plastic strip 76 is fixedly connected to the surface of the sealing assembly 73. The temperature reduction mechanism 7 further includes an air duct 75, and the outer surface of the air duct 75 is fixedly installed on the inner side surface of the connecting cylinder 51.

[0053] During use, the partition plate 53 blocks the conical half shell 52 and the half cylinder body 54. The conical half shell 52 and the half cylinder body 54 are separated for pouring silicone paint. The pouring and shaping of the conical half shell 52 are used to fix the communication pipe 8. The inside of the communication pipe 8 is communicated with the inside of the air duct 75, and the connection part of the two pipes is arranged inside the conical half shell 52. When the cable is used for a long time, to prevent corrosive substances from corroding the silicone, the conical half shell 52 is opened for cleaning and then re-poured with silicone paint. The air pump 9 makes the gas inside the air duct 75 and the communication pipe 8 circulate. Cooling liquid flows inside the cooling pipe 71. The bottom end of the T-shaped rod 74 penetrates through the cooling pipe 71 and extends to the air duct 75. The gas flowing inside the air duct 75 is cooled, and the wire core 1 close to the outside of the air duct 75 is quickly cooled, solving the problem that high temperature will soften, age, and even crack the cable insulation material, resulting in the reduction of the service life and safety performance of the cable.

[0054] Fifth Embodiment: As Figure 8 、 Figure 9 、 Figure 10As shown, the sealing assembly 73 includes a necked shell 731 which is fixedly installed on the surface of the sheath 4. At the upper position of the inner side surface of the necked shell 731, a fixed plate 732 is fixedly connected. On the surface of the fixed plate 732, a guide slider 733 is fixedly connected. The sealing assembly 73 further includes a plastic tube 734 which is fixedly installed on the inner side surface of the air guide tube 75. On the surface of the plastic tube 734, a rectangular shell 735 is fixedly connected. On the surface of the rectangular shell 735, a heat conducting plate 736 is fixedly connected.

[0055] During use, the necked shell 731 vertically penetrates downward through the sheath 4, the heat shrinkable tube 3 and the centering tube 21. With the filling of the silicone coating, the necked shell 731 is stably positioned. The bottom end of the T-shaped rod 74 penetrates through the cooling tube 71. The T-shaped rod 74 continues to move downward and slides over the guide slider 733. The bottom end of the T-shaped rod 74 extends to the rectangular shell 735. The rectangular shell 735, the T-shaped rod 74 and the heat conducting plate 736 are all made of heat conducting materials, while the air guide tube 75, the plastic tube 734 and the plastic strip 76 are made of plastic materials. The overall plastic structure is sleeved inside the air guide tube 75, making the whole cable easy to bend and improving the anti-bending and cracking ability of the cable. When the bottom end of the T-shaped rod 74 contacts the rectangular shell 735, a heat expansion and contraction coating is poured into the inside of the necked shell 731. The coating fully fills the gap between the T-shaped rod 74 and the necked shell 731. The T-shaped rod 74 transfers the heat of the air guide tube 75 to the cooling tube 71. When the conduit 72 controls the circulation of the cooling liquid inside the cooling tube 71, the heat of the wire core 1 is quickly taken away, making the cooling efficiency of the wire core 1 higher.

[0056] The sixth embodiment: As Figures 1-10 shown, a preparation method of a cable resistant to saline-alkali corrosion includes the following steps:

[0057] Step 1, manufacturing the conductor wire core 1. At room temperature, a copper rod is drawn into copper wires. The copper wires are heated and kept warm, and then naturally cooled. The copper wires are stranded in a multi-strand single-wire stranding method to form a copper stranded wire. A traction machine is used to draw the copper stranded wire to be coated into the internal part of an injection extrusion machine to coat a heat-melt cross-linked polyethylene material. After cooling and shaping, the wire core 1 is formed. Subsequently, the manufacturing of multiple wire cores 1 is completed in sequence, and the end face position of the wire core 1 is peeled.

[0058] Step 2, installing the centering structure. The centering tube 21 is a special-shaped tubular structure made by melting plastic and rubber particles through an extrusion machine. The plastic plate 23 is fixedly installed at the end face position of the centering tube 21 by heat-melt gluing. The plastic plate 23 is used to fixedly connect with the connecting cylinder 51. Multiple wire cores 1 are placed into the concave position of the centering tube 21. Subsequently, the hemp rope 22 is stuffed into the inner side surface of the centering tube 21. The heat shrinkable tube 3 is sleeved outside the centering tube 21, and the heat shrinkable tube 3 is heated. After heating and shrinking, the heat shrinkable tube 3 is closely attached to the outer surface of the centering tube 21.

[0059] Step 3: Sealing and potting. When the two semi-cylinders 54 are relatively fixed, a potting cavity is formed with the joint plate 561. The stripped end of the wire core 1 extends into the interior of the semi-cylinder 54. The joint plate 561 is fixedly connected to the semi-cylinder 54. The stripped end of the wire core 1 is in close contact with the inner side of the insulating cylinder 563. The potting tube 55 injects silicone paint into the interior of the semi-cylinder 54. The silicone paint fills the gap so that the wire core 1 can be firmly joined to the conductive plate 562, and corrosive liquids and gases are not likely to corrode the wire core 1 through the semi-cylinder 54.

[0060] Step 4: Installation of the cooling structure. The necking shell 731 vertically penetrates downward through the sheath 4, the heat-shrinkable tube 3, and the centering tube 21. As the silicone paint is filled, the necking shell 731 is stably positioned. The bottom end of the T-shaped rod 74 passes through the cooling tube 71. The T-shaped rod 74 continues to move downward and slides past the guide slider 733. The bottom end of the T-shaped rod 74 extends into the rectangular shell 735. When the bottom end of the T-shaped rod 74 contacts the rectangular shell 735, a thermal expansion and contraction paint is poured into the interior of the necking shell 731. The paint fully fills the gap between the T-shaped rod 74 and the necking shell 731, and the joint line between the T-shaped rod 74 and the cooling tube 71 is welded and sealed.

[0061] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A cable resistant to saline-alkali corrosion, comprising a wire core (1), characterized in that, The wire core (1) is composed of a copper strand and a cross-linked polyethylene tube, the number of the wire cores (1) is six, a centering component (2) is fixedly connected to the surface of the wire core (1), a heat shrink tube (3) is fixedly connected to the surface of the centering component (2), the outer surface of the heat shrink tube (3) is covered with a sheath (4), and further comprises: A joining mechanism (5), the joining mechanism (5) being used for the conductive connection between the end face of the wire core (1) and the device and for the anti-corrosion sealing of the end face of the wire core (1); A support mechanism (6), the support mechanism (6) is sleeved and fixedly mounted on the outer surface of the sheath (4), the support mechanism (6) is used for spacing protection between the sheath (4) and the corrosive substance, the inner side surface of the support mechanism (6) is fixedly connected to a connecting pipe (8), and the surface of the connecting pipe (8) is fixedly connected to an air pump (9); A cooling mechanism (7), the cooling mechanism (7) being fixedly mounted on the inner side of the supporting mechanism (6), and the cooling mechanism (7) being used for rapidly conducting heat away from the surface of the wire core (1); The joining mechanism (5) comprises a connecting cylinder (51), the end surface of the connecting cylinder (51) is fixedly connected to a conical half shell (52), a blocking plate (53) is fixedly connected to the end surface of the conical half shell (52) away from the connecting cylinder (51), a side of the blocking plate (53) away from the conical half shell (52) is fixedly connected to a semi-cylinder (54), and the surfaces of the semi-cylinder (54) and the conical half shell (52) are both fixedly connected to a glue injection tube (55).

2. The salt and alkali corrosion resistant cable according to claim 1, wherein: The wire core (1) is stripped at a position close to the end face, a gap is provided between the heat shrink tube (3) and the sheath (4), a glue injection hole is provided on the surface of the sheath (4), and the stripped end of the wire core (1) extends to the interior of the semi-cylinder (54).

3. The salt and alkali corrosion resistant cable according to claim 2, wherein: The end surface of the semi-cylinder (54) away from the blocking plate (53) is fixedly connected to a connecting plate (561), a through hole is provided starting from the middle of the surface of the connecting plate (561), and a conductive plate (562) is fixedly connected to the end surface of the connecting plate (561).

4. The salt and alkali corrosion resistant cable according to claim 3, wherein: The end face of the joining plate (561) away from the conductive plate (562) is fixedly connected to an insulating tube (563), the end face of the conductive plate (562) is connected to the interior of the insulating tube (563), and one end of the insulating tube (563) away from the conductive plate (562) is fixedly connected to a rubber ring (564).

5. A salt and alkali corrosion resistant cable according to claim 4, characterized in that: The centering component (2) comprises a centering tube (21), the inner side surface of the centering tube (21) is fixedly connected to a hemp rope (22), and the end surface of the centering tube (21) is fixedly connected to a plastic plate (23).

6. The salt and alkali corrosion resistant cable according to claim 5, wherein: The cooling mechanism (7) comprises a cooling pipe (71), the cooling pipe (71) being fixedly mounted on the inner side surface of the supporting mechanism (6), the end surface of the cooling pipe (71) being fixedly connected to a guide tube (72), and the surface of the cooling pipe (71) being fixedly connected to a T-shaped rod (74).

7. The salt and alkali corrosion resistant cable according to claim 6, characterized in that: The bottom end of the T-shaped rod (74) is fixedly connected with a sealing assembly (73). A plastic strip (76) is fixedly connected to the surface of the sealing assembly (73). The cooling mechanism (7) further includes an air duct (75), and the outer surface of the air duct (75) is fixedly installed on the inner side surface of the connecting cylinder (51).

8. A salt and alkali corrosion resistant cable according to claim 7, characterized in that: The sealing assembly (73) includes a necking shell (731). The necking shell (731) is fixedly installed on the surface of the sheath (4). A fixing plate (732) is fixedly connected to the upper position of the inner side surface of the necking shell (731). A guiding slider (733) is fixedly connected to the surface of the fixing plate (732).

9. The salt-alkali corrosion resistant cable according to claim 8, wherein: The sealing assembly (73) further includes a plastic pipe (734). The plastic pipe (734) is fixedly installed on the inner side surface of the air duct (75). A rectangular shell (735) is fixedly connected to the surface of the plastic pipe (734). A heat conducting plate (736) is fixedly connected to the surface of the rectangular shell (735).

10. A preparation method of a cable resistant to saline-alkali corrosion, characterized in that: It includes the following steps: Step 1: Manufacture of the conductor core (1). At room temperature, a copper bar is drawn into a copper wire. The copper wire is heated and kept warm, and then naturally cooled. The copper wire is stranded by using a multi-strand single-wire stranding method to form a copper stranded wire. A traction machine is used to draw the copper stranded wire to be coated into the interior of an injection extrusion machine to coat a heat-melt cross-linked polyethylene material. After cooling and shaping, a core (1) is formed. Subsequently, the manufacture of multiple cores (1) is completed in sequence, and the end face position of the core (1) is peeled; Step 2: Installation of the centering structure. The centering tube (21) is a special-shaped tubular structure made of melted plastic and rubber particles through an extrusion machine. The plastic plate (23) is fixedly installed at the end face position of the centering tube (21) by means of heat-melt gluing. The plastic plate (23) is used for fixedly connecting with the connecting cylinder (51). Multiple cores (1) are placed into the concave position of the centering tube (21). Subsequently, a hemp rope (22) is stuffed into the inner side surface of the centering tube (21). A heat shrinkable tube (3) is sleeved on the outside of the centering tube (21), and the heat shrinkable tube (3) is heated. After the heat shrinkable tube (3) is heated and shrunk, it is closely attached to the outer surface of the centering tube (21); Step 3: Sealing and potting. When the two semi-cylinders (54) are relatively fixed, a potting cavity is formed with the joint plate (561). The peeled end of the core (1) extends into the interior of the semi-cylinder (54). The joint plate (561) is fixedly connected with the semi-cylinder (54). The peeled end of the core (1) is in close contact with the inner side surface of the insulating cylinder (563). A potting tube (55) injects a silicone coating into the interior of the semi-cylinder (54). The silicone coating fills the gap so that the core (1) can be firmly joined with the conductive plate (562), and corrosive liquids and gases are not likely to corrode the core (1) through the semi-cylinder (54); Step 4. Installation of the cooling structure. The necked shell (731) vertically penetrates downward through the sheath (4), heat shrinkable tube (3), and centering tube (21). With the filling of the silicone coating, the necked shell (731) is stably positioned. The bottom end of the T-shaped rod (74) penetrates through the cooling tube (71). The T-shaped rod (74) continues to move downward and slides over the guide slider (733). The bottom end of the T-shaped rod (74) extends to the rectangular shell (735). After the bottom end of the T-shaped rod (74) contacts the rectangular shell (735), a thermal expansion and contraction coating is poured into the interior of the necked shell (731). The coating fully fills the gap between the T-shaped rod (74) and the necked shell (731), and the joint line between the T-shaped rod (74) and the cooling tube (71) is welded and sealed.

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