Fire-resistant cable production and processing method

Abstract

The invention provides a fire-resistant cable production and processing method, which belongs to the technical field of cable processing equipment and comprises the following steps of raw material preparation, wire drawing, reaming, inner layer coating, coating and outer layer coating. According to the invention, the metal wire core is coated with the double-layer refractory material and is coated with the refractory coating, so that the fireproof performance of the cable is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of cable processing equipment, and in particular to a method for producing and processing a fire-resistant cable. Background Art

[0002] A cable is an electric energy or signal transmission device, which is made of one or more mutually insulated conductors and an outer insulating protective layer to transmit electricity or information from one place to another. It has both a conductor and an insulating layer, and sometimes a tight inner protective layer to prevent moisture intrusion, or an outer protective layer with high mechanical strength. In order to extend the service life of the cable and improve the flame retardancy and fire resistance of the cable, the cable surface needs to be coated with a refractory material during the cable production process, but the fire resistant effect of a single layer of refractory material coating is not good. To this end, the present invention provides a method for producing and processing a fire-resistant cable. Summary of the invention

[0003] The purpose of the invention is to provide a method for producing and processing a fire-resistant cable.

[0004] To solve the above technical problems, the purpose of the present invention is achieved as follows:

[0005] A method for producing and processing a fire-resistant cable comprises the following steps:

[0006] S1. Raw material preparation: prepare metal conductor core material, outer insulating refractory material and fire-resistant flame retardant coating agent;

[0007] S2, wire drawing: the metal conductor raw material is drawn through the die hole of the wire drawing machine to produce a single wire with the required cross-sectional shape and size;

[0008] S3, twisting; twisting the multiple monofilaments obtained in step S2 together in a specified direction to form a wire core that meets the requirements and has an overall strength;

[0009] S4, inner layer coating; the wire core prepared in step S3 is coated with an insulating refractory material by a wrapping process to obtain a single-layer coated cable;

[0010] S5, coating: using coating processing equipment to coat the fire-resistant flame retardant coating agent on the outside of the single-layer coated cable obtained in step S4 to obtain a coated cable;

[0011] S6, outer layer coating: the coated cable obtained in step S5 is coated with insulating refractory material by a wrapping process to obtain a double-layer coated cable.

[0012] On the basis of the above scheme and as a preferred scheme of the above scheme, the coating processing equipment includes: a fixed base; the fixed base has an opening in the center, and a rotatable rotating disk is arranged on one side; the rotating disk has a hole in the center, a driving gear arranged concentrically therewith is fixedly connected to the first side, and an adjusting disk arranged concentrically therewith is rotatably connected to the second side; the driving gear has a hole in the center, and is driven to rotate by a first driving motor arranged on the fixed base; the adjusting disk has a hole in the center, and a rotating part is arranged on its second side, the rotating part is arranged around the hole in the center of the adjusting disk, and extends to the outside of the fixed base in the direction of the fixed base; a rotating handle is arranged at the end of the rotating part;

[0013] A plurality of through slots are provided inside the rotating disk; the through slots extend outwardly from the central opening of the rotating disk along the diameter direction of the rotating disk until they penetrate the rotating disk; a slot is provided on one side of the through slot; the slot extends inwardly from the second side surface of the rotating disk until it is connected with the through slot;

[0014] A coating cylinder is arranged in the through groove; the coating cylinder is hollow inside, a coating ball is arranged at the first end which is fixed in position and rotatable, the second end is open, a movable sealing plug is arranged inside, and a moving column and an injection check valve are arranged on the outer wall; a first spring is connected to the side of the sealing plug away from the first end of the coating cylinder; the other end of the first spring extends to the outside of the coating cylinder and is connected to a baffle arranged on the outside of the coating cylinder; an opening is arranged in the center of the baffle; the moving column extends from the slot to the outside of the rotating disk, and slides in the arc-shaped sliding groove arranged on the adjusting disk; a connecting groove is arranged on the side of the sealing plug; the connecting groove is located in the center of the first spring and corresponds to the opening in the center of the baffle;

[0015] The fixed base is provided with a mounting base; the number of the mounting bases is several and they are provided corresponding to the coating cylinders; a sliding base is slidably provided on the side of the mounting base; the sliding base is driven by a moving mechanism to move in a direction close to or away from the coating cylinder; a liftable filling head is provided at the first end of the sliding base, and a retractable pull rod is provided at the second end; an electromagnet suction head is provided at the end of the pull rod; the electromagnet suction head is adapted to the connecting groove to realize the magnetic connection between the pull rod and the sealing plug;

[0016] The sliding base is provided with an abutment rod; the abutment rod can abut against an abutment platform provided on the outer peripheral surface of the rotating disk.

[0017] On the basis of the above scheme and as a preferred scheme of the above scheme, the rotating disk is rotatably connected to the fixed base through a rotating connecting tube; the rotating connecting tube is arranged around the outside of the adjusting disk; the injection one-way valve is located outside the rotating connecting tube.

[0018] On the basis of the above scheme and as a preferred scheme of the above scheme, a transmission gear is meshedly provided on one side of the driving gear; and the transmission gear is drivingly connected to the output shaft of the first driving motor.

[0019] On the basis of the above scheme and as a preferred scheme of the above scheme, extension parts are provided on both sides of the baffle; the extension parts extend to both sides of the coating tube and are connected to the first end of the second spring; the second end of the second spring is connected to a fixing plate provided on the outer peripheral surface of the coating tube.

[0020] On the basis of the above scheme and as a preferred scheme of the above scheme, the moving mechanism includes a screw; the screw is rotatably arranged on the mounting base and is driven to rotate by a second drive motor arranged on the mounting base; a sliding connection part is arranged on the sliding base; the sliding connection part is threadedly connected with the screw.

[0021] On the basis of the above scheme and as a preferred scheme of the above scheme, the sliding base is an L-shaped sliding base; the L-shaped sliding base includes a horizontal arm and a vertical arm; the filling head is provided at the end of the horizontal arm; the pull rod is provided at the bottom end of the vertical arm, and the sliding connection part is located in the middle of the vertical arm.

[0022] On the basis of the above scheme and as a preferred scheme of the above scheme, the filling head is lifted and lowered by a lifting mechanism; the lifting mechanism includes a base plate; a lifting cylinder is arranged on the base plate; the end of the piston rod of the lifting cylinder is connected to a sliding block that slides with the base plate; the filling head is connected to the sliding block.

[0023] On the basis of the above scheme and as a preferred scheme of the above scheme, the pull rod is telescopically extended by a telescopic mechanism; the telescopic mechanism includes a telescopic cylinder; the telescopic cylinder is fixed to the bottom end of the vertical arm, and its piston rod is connected to the pull rod to drive the pull rod to move.

[0024] The beneficial effects of the present invention are: 1. The present invention adopts a double-layer refractory material to cover the metal wire core and covers it with a refractory coating, which greatly improves the fire resistance of the cable.

[0025] 2. The coating processing equipment of the present invention uses a plurality of coating cylinders around the cable to coat the cable, which can ensure uniform coating and good coating effect. The coating cylinder is arranged on a rotating disk, which is driven to rotate by a first driving motor so that the coating cylinder can rotate around the cable to ensure that the coating covers the cable surface. Due to the rotation of the plurality of coating cylinders, the coating spheres of each coating cylinder coat the cable in turn, which not only ensures uniform coating, but also has a smoothing effect to ensure that the coating thickness on the cable surface is moderate.

[0026] Each coating cylinder is arranged in the through slot of the rotating disk, and cooperates with the adjusting disk arranged on the side of the rotating disk through the moving column on the side. By turning the handle to rotate the adjusting disk, the moving column and the coating cylinder can be driven to slide along the through slot to change the distance between each coating cylinder to adapt to cables of different diameters, thereby improving the applicability of the equipment. The adjusting disk also has a limiting function, which can fix the relative position of the coating cylinder and the rotating disk to prevent the coating cylinder from moving under the action of centrifugal force when the rotating disk rotates, thereby affecting the coating effect.

[0027] A mounting base is arranged on the fixed base, and a pull rod and a filling head are arranged on the mounting base. When the coating agent in the coating cylinder is used up, the moving mechanism drives the filling head and the pull rod to move toward the coating cylinder, and firstly, the pull rod and the electromagnet suction head at the end of the pull rod are made to enter the interior of the coating cylinder and be magnetically connected with the sealing plug through the telescopic mechanism, and then the sealing plug is pulled to move toward the rear end of the coating cylinder to form an injection cavity; then the filling head descends and cooperates with the injection one-way valve on the side of the coating cylinder to inject the coating agent into the coating cylinder, and the filling head is separated in sequence after the injection is completed to avoid affecting the rotation of the rotating disk.

[0028] A movable sealing plug is provided in the coating cylinder to prevent the coating agent in the coating cylinder from overflowing from the opening at the end of the coating cylinder. At the same time, the sealing plug is connected to the coating cylinder by a spring, so that the sealing plug can move with the use of the coating agent. This not only ensures a good sealing effect, but also maintains pressure on the coating agent so that the coating agent will not move outward under the action of centrifugal force and affect the coating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the coating processing equipment of the present invention.

[0030] Figure 2 This is a schematic structural diagram of the coating processing equipment of the present invention from another perspective.

[0031] Figure 3 It is a partial structural schematic diagram of the coating processing equipment of the present invention.

[0032] Figure 4 It is a schematic diagram of the structure of the rotating disk and the adjusting disk of the coating processing equipment of the present invention.

[0033] Figure 5 It is a schematic diagram of the structure of the rotating disk and coating cylinder of the coating processing equipment of the present invention.

[0034] Figure 6 This is a front view of the rotating disk of the coating processing equipment of the present invention.

[0035] Figure 7 It is a schematic diagram of the coating barrel structure of the coating processing equipment of the present invention.

[0036] Figure 8It is a schematic diagram of the coating agent replenishing mechanism and coating barrel structure of the coating processing equipment of the present invention.

[0037] Fig. 9 It is a schematic diagram of the structure of the coating agent replenishing mechanism of the coating processing equipment of the present invention.

[0038] Fig.10 It is a schematic diagram of the structure of the filling head and lifting mechanism of the coating processing equipment of the present invention.

[0039] In the figure: 1. fixed base; 2. rotating disk; 21. through groove; 22. slot; 23. abutment platform; 3. driving gear; 31. transmission gear; 4. adjusting disk; 41. sliding groove; 5. first driving motor; 6. rotating part; 61. rotating handle; 7. coating cylinder; 71. coating ball; 72. sealing plug; 73. moving column; 74. injection check valve; 75. first spring; 76. baffle; 77. connecting groove; 78. extension part; 79. second spring; 710. fixed plate; 8. mounting base; 81. screw rod; 82. second driving motor; 9. sliding base; 91. abutment rod; 92. sliding connection part; 10. filling head; 101. bottom plate; 102. lifting cylinder; 103. sliding block; 11. pull rod; 111. telescopic cylinder; 12. electromagnet suction head; 13. rotating connecting cylinder;

[0040] 100. Cable. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0043] A method for producing and processing a fire-resistant cable comprises the following steps:

[0044] S1. Raw material preparation: prepare metal conductor core material, outer insulating refractory material and fire-resistant flame retardant coating agent;

[0045] S2, wire drawing: the metal conductor raw material is drawn through the die hole of the wire drawing machine to produce a single wire with the required cross-sectional shape and size;

[0046] S3, twisting; twisting the multiple monofilaments obtained in step S2 together in a specified direction to form a wire core that meets the requirements and has an overall strength;

[0047] S4, inner layer coating; the wire core prepared in step S3 is coated with an insulating refractory material by a wrapping process to obtain a single-layer coated cable;

[0048] S5, coating: using coating processing equipment to coat the fire-resistant flame retardant coating agent on the outside of the single-layer coated cable obtained in step S4 to obtain a coated cable;

[0049] S6, outer layer coating: the coated cable obtained in step S5 is coated with an insulating refractory material by a wrapping process to obtain a double-layer coated cable.

[0050] Among them, Figure 1 and Figure 2 As shown, the coating processing equipment in step S5 includes: a fixed base 1, the fixed base 1 has an opening in the center, and a rotatable rotating disk 2 is arranged on one side. The opening in the center of the fixed base 1 is circular; the rotating disk 2 is circular, and is arranged concentrically with the circular opening, and the rotating disk 2 is rotatable.

[0051] like Figure 5 and Figure 6 As shown, the rotating disk 2 has a central opening, a driving gear 3 arranged concentrically therewith is fixedly connected to the first side, and an adjusting disk 4 arranged concentrically therewith is rotatably connected to the second side. The central opening of the rotating disk 2 is a circular hole.

[0052] Among them, Figure 3 As shown, a through hole corresponding to the central hole of the rotating disk 2 is opened in the center of the driving gear 3, and the driving gear 3 is driven to rotate by the first driving motor 5 arranged on the fixed base 1. The driving gear 3 is fixedly connected with the rotating disk 2, and the two rotate synchronously. A transmission gear 31 is meshedly arranged on one side of the driving gear 3, and the transmission gear 31 is drivingly connected with the output shaft of the first driving motor 5.

[0053] like Figure 4As shown, a through hole corresponding to the central opening of the rotating disk 2 is provided at the center of the adjusting disk 4, and a rotating portion 6 is provided on its second side surface (the side away from the rotating disk 2). The rotating portion 6 is a cylindrical structure, which is arranged around the circular opening at the center of the adjusting disk 4. At the same time, the rotating portion extends toward the fixed base 1 to the outside of the fixed base 1, and a rotating handle 61 is provided at the end of the rotating portion 6 located outside the fixed base 1. A circular through hole is also provided at the center of the rotating handle 61. The adjusting disk 4 can be manually rotated relative to the rotating disk 2 by rotating the handle 61. In order to improve the stability of the adjusting disk 4, the rotating connection between the adjusting disk 4 and the rotating disk 2 is a damping rotating connection, that is, when the adjusting disk 4 is rotated, it is damped and needs to be rotated vigorously.

[0054] like Figure 5 and Figure 6 As shown, a plurality of through slots 21 are provided inside the rotating disk 2, and the through slots 21 extend outward from the opening at the center of the rotating disk 2 along the diameter direction of the rotating disk 2 until they penetrate the rotating disk 2. A slot 22 is provided on one side of the through slot 21, and the slot 22 extends inward from the second side surface of the rotating disk 2 until it is connected with the through slot 21. The slot 22 has the same length as the through slot 21, and both penetrate the rotating disk 2.

[0055] A coating cylinder 7 is disposed in the through groove 21, and the coating cylinder 7 slides in the through groove 21. The coating cylinder 7 is preferably a cylindrical structure, hollow inside, with a fixed and rotatable coating ball 71 disposed at the first end, and an opening at the second end. The coating cylinder 7 can contain a coating agent, and its first end is a structure with a gradually decreasing diameter.

[0056] like Figure 7 As shown, a movable sealing plug 72 is arranged inside the coating cylinder 7, and a moving column 73 and an injection check valve 74 are arranged on the outer wall. The sealing plug 72 is used to close the barrel of the coating cylinder 7 to prevent the coating agent inside from leaking. A first spring 75 is connected to the side of the sealing plug 72 away from the first end of the coating cylinder 7, and the other end of the first spring 75 extends to the outside of the coating cylinder 7 and is connected to a baffle 76 arranged outside the coating cylinder 7. The first spring 75 is a spring of cylindrical structure, and a through hole is left in the center so that the pull rod 11 described below can pass through. The moving column 73 and the injection check valve 74 are fixedly arranged on the same side of the coating cylinder 7, and the moving column 73 is closer to the first end of the coating cylinder 7.

[0057] The baffle 76 is circular, with an opening in the center, which is circular and corresponds to the center hole of the first spring 75. Further, extensions 78 are provided on both sides of the baffle 76, which extend to both sides of the coating cylinder 7 and are connected to the first end of the second spring 79, and the second end of the second spring 79 is connected to the fixing sheet 710 provided on the outer peripheral surface of the coating cylinder 7. The baffle 76 is elastically matched with the coating cylinder 7. When there is more coating agent in the coating cylinder 7, the sealing plug 72 is squeezed to approach the second end of the coating cylinder 7, at which time the first spring 75 is compressed and drives the second spring 79 to be stretched to ensure the pressure of the sealing plug 72 on the coating agent; as the coating agent is used, the sealing plug 72 gradually approaches the first end of the coating cylinder 7, and the first spring 75 gradually stretches. When the first spring 75 stretches, its pressure on the baffle 76 is reduced, and the baffle 76 approaches the coating cylinder 7 under the action of the second spring 79. If the position of the baffle 76 is fixed differently, the pressure of the sealing plug 72 on the coating agent will be smaller as it goes backwards. Therefore, in this embodiment, the baffle 76 is elastically connected to the coating cylinder 7 through the second spring 79, so that the baffle 76 can gradually approach the coating cylinder 7 as the coating agent is used, so as to ensure that the pressure of the sealing plug 72 on the coating agent is relatively constant.

[0058] like Figure 4 and Figure 5 As shown, the moving column 73 and the injection check valve 74 are extended from the slot 22 to the outside of the rotating disk 2. At the same time, the upper section of the moving column 73 slides in the arc-shaped sliding groove 41 provided on the adjusting disk 4. There are several arc-shaped sliding grooves 41, corresponding to each coating cylinder 7, and cooperate with the moving column 73 to achieve the relative fixation of the position of the coating cylinder 7. When the adjusting disk 4 is rotated, the arc-shaped sliding groove 41 will drive the moving column 73 to move, and then drive the coating cylinder 7 to move along the through groove 21, so as to change the spacing between the first ends of each coating cylinder 7 to adapt to cables of different diameters.

[0059] A connecting groove 77 is provided at the center position of the side of the sealing plug 72 away from the center of the rotating disk 2. The connecting groove 77 is located at the center of the first spring 75, corresponding to the center through hole position of the first spring 75, and at the same time corresponding to the opening in the center of the baffle 76, so that the external pull rod 11 can extend into the coating cylinder 2 and connect with the sealing plug 72.

[0060] The rotating disk 2 is rotatably connected to the fixed base 1 through the rotating connecting cylinder 13. The rotating connecting cylinder 13 is a cylindrical structure and is arranged around the outside of the adjusting disk 4. The rotating connecting cylinder 13 includes two parts that rotate with each other, one part is connected to the fixed base 1, and the other part is connected to the rotating disk 2. The injection check valve 74 is located outside the rotating connecting cylinder 13 so that the filling head 10 can cooperate.

[0061] like Figure 1 and Figure 2 As shown, a mounting base 8 is disposed on the fixed base 1 , and the number of the mounting bases 8 is several, and each mounting base 8 is disposed corresponding to each coating cylinder 7 .

[0062] like Figure 8 and Fig. 9 As shown, a sliding base 9 is slidably arranged on the side of the mounting base 8, and the sliding base 9 is driven by a moving mechanism to move in a direction close to or away from the coating tube 7. Among them, the moving mechanism includes a screw rod 81, which is rotatably arranged on the mounting base 8 and driven to rotate by a second drive motor 82 arranged on the mounting base 8. A sliding connection part 92 is arranged on the sliding base 9, and the sliding connection part 92 is threadedly connected with the screw rod 81. The sliding connection part 92, i.e., the sliding base 8, is driven to move by the screw rod 81.

[0063] The first end of the sliding base 9 is provided with a liftable filling head 10, and the second end is provided with a retractable pull rod 11. The end of the pull rod 11 is provided with an electromagnet suction head 12, which is adapted to the connection groove 77 to achieve the magnetic connection between the pull rod 11 and the sealing plug 72. The filling head 10 is adapted to the injection check valve 74, and can be docked and inject the coating agent into the coating barrel 7.

[0064] Specifically, if Figure 8 As shown, the sliding base 9 is an L-shaped structure, which is divided into a horizontal arm and a vertical arm. The end of the horizontal arm is provided with the above-mentioned filling head 10, the bottom end of the vertical arm is provided with the above-mentioned pull rod 11, and the sliding connection part 92 is located in the middle of the vertical arm.

[0065] In more detail, Fig.10 As shown, the filling head 10 is lifted and lowered by a lifting mechanism, which includes a bottom plate 101, which is fixed to the end of the horizontal arm, and a lifting cylinder 102 is arranged on the bottom plate 101, and the end of the piston rod of the lifting cylinder 102 is connected to a sliding block 103 that is slidably matched with the bottom plate 101, and the filling head 10 is connected to the sliding block 103. The lifting cylinder 102 drives the filling head 10 to lift and lower to achieve its cooperation with the injection check valve 74. At the same time, the pull rod 11 is extended and retracted by a telescopic mechanism, which includes a telescopic cylinder 111, which is fixed to the bottom end of the vertical arm, and its piston rod is connected to the pull rod 11 to drive the pull rod 11 to move, so that the pull rod 11 can enter the coating cylinder 7.

[0066] The sliding base 9 is provided with an abutment rod 91 , which is arranged below the horizontal arm and can abut against an abutment platform 23 arranged on the outer circumference of the rotating disk 2 to limit the moving position of the sliding base 9 and facilitate positioning.

[0067] Coating process: The cable 100 passes through the central opening of each structure, and the adjustment disk 4 drives each coating cylinder 7 to move, so that the coating ball 71 contacts the surface of the cable 100. The cable 100 moves forward, and at the same time, the first drive motor 5 drives the drive gear 3 and the rotating disk 2 to rotate, and the rotating disk 2 drives the coating cylinder 7 to rotate, so that the coating agent is evenly coated on the surface of the cable 100.

[0068] Filling process: When the coating agent in the coating cylinder 7 is used up, the rotating disk 2 and each coating cylinder 7 are rotated to the set position. Then the second drive motor 82 drives the screw rod 81 to rotate, and the screw rod 81 drives the sliding base 9 to move forward until the abutment rod 91 abuts on the abutment platform 23. At this time, the filling head 10 is facing the injection check valve 74, and the pull rod 11 is facing the coating cylinder 7. After that, the telescopic cylinder 111 works, driving the pull rod 11 and the electromagnet suction head 12 to move, and after passing through the opening in the center of the baffle 76 and the internal through hole of the first spring 75 in turn, the electromagnet suction head 12 is inserted into the connecting groove 77 on the sealing plug 72, and the power is turned on to realize the magnetic connection, and then the telescopic cylinder 111 retracts, so that the pull rod 11 drives the sealing plug 72 to move toward the second end of the coating cylinder 7, so that there is an injection cavity in the coating cylinder 7. Maintaining magnetic attraction, the upgrading cylinder 102 drives the filling head 10 to descend so that it cooperates with the injection check valve 74 and injects the coating agent. After the injection is completed, the filling head 10 is disengaged first, and then the pull rod 11 is disengaged, and the sliding base 9 returns to its original position.

[0069] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

[0070] Finally, it is also necessary to understand that certain technical features in the embodiments may not be necessary for solving specific technical problems, and thus these technical features may be absent or omitted without affecting the solution of the technical problems or the formation of technical solutions; moreover, the features, elements and / or functions of one embodiment may be appropriately combined, coupled or coordinated with the features, elements and / or functions of one or more other embodiments, unless the combination, coupling or coordination is obviously not feasible.

Claims

1. A method for producing and processing a fire-resistant cable, characterized in that: The following steps are involved: S1. Raw material preparation: prepare metal conductor core material, outer insulating refractory material and fire-resistant flame retardant coating agent; S2, wire drawing: the metal conductor raw material is drawn through the die hole of the wire drawing machine to produce a single wire with the required cross-sectional shape and size; S3, hinged; Twisting the multiple monofilaments obtained in step S2 together in a specified direction to form a wire core that meets the requirements and has an overall strength; S4, inner layer coating; the wire core prepared in step S3 is coated with an insulating refractory material by a wrapping process to obtain a single-layer coated cable; S5, coating: using coating processing equipment to coat the fire-resistant flame retardant coating agent on the outside of the single-layer coated cable obtained in step S4 to obtain a coated cable; S6, outer layer coating: the coated cable obtained in step S5 is coated with insulating refractory material by a wrapping process to obtain a double-layer coated cable.

2. A method for producing and processing a fire-resistant cable according to claim 1, characterized in that: The coating processing equipment comprises a fixed base (1); the fixed base (1) has an opening at the center, and a rotatable rotating disk (2) is arranged on one side; the rotating disk (2) has a central opening, and a driving gear (3) arranged concentrically therewith is fixedly connected to the first side surface, and an adjusting disk (4) arranged concentrically therewith is rotatably connected to the second side surface; the driving gear (3) has a central opening and is driven to rotate by a first driving motor (5) arranged on the fixed base (1); the adjusting disk (4) has a central opening, and a rotating part (6) is arranged on its second side surface, the rotating part (6) is arranged around the central opening of the adjusting disk (4) and extends toward the fixed base (1) to the outside of the fixed base (1); a rotating handle (61) is arranged at the end of the rotating part (6); A plurality of through grooves (21) are provided inside the rotating disk (2); the through grooves (21) extend outwards from a central opening of the rotating disk (2) along a diameter direction of the rotating disk (2) until they penetrate the rotating disk (2); a slot (22) is provided on one side of the through groove (21); the slot (22) extends inwards from a second side surface of the rotating disk (2) until it is connected with the through groove (21); A coating cylinder (7) is arranged in the through groove (21); the coating cylinder (7) is hollow inside, a coating ball (71) which is fixed and rotatable is arranged at the first end, and the second end is open, a movable sealing plug (72) is arranged inside, and a movable column (73) and an injection check valve (74) are arranged on the outer wall; a first spring (75) is connected to the side of the sealing plug (72) away from the first end of the coating cylinder (7); the other end of the first spring (75) extends to the outside of the coating cylinder (7) and is connected to the coating cylinder (7). The coating cylinder (7) is connected to a baffle (76) arranged outside the coating cylinder (7); a hole is provided at the center of the baffle (76); the movable column (73) extends from the slot (22) to the outside of the rotating disk (2) and slides in an arc-shaped sliding slot (41) provided on the adjusting disk (4); a connecting groove (77) is provided on the side of the sealing plug (72); the connecting groove (77) is located at the center of the first spring (75) and corresponds to the hole at the center of the baffle (76); The fixed base (1) is provided with a mounting base (8); the mounting base (8) is provided in a plurality of numbers and is provided corresponding to the coating cylinder (7); a sliding base (9) is provided on the side of the mounting base (8) for sliding movement; the sliding base (9) is driven by a moving mechanism to move in a direction approaching or away from the coating cylinder (7); a liftable filling head (10) is provided at the first end of the sliding base (9), and a retractable pull rod (11) is provided at the second end; an electromagnet suction head (12) is provided at the end of the pull rod (11); the electromagnet suction head (12) is adapted to the connecting groove (77) to realize the magnetic connection between the pull rod (11) and the sealing plug (72); The sliding base (9) is provided with an abutment rod (91); the abutment rod (91) can abut against an abutment platform (23) provided on the outer peripheral surface of the rotating disk (2).

3. A method for producing and processing a fire-resistant cable according to claim 2, characterized in that: The rotating disk (2) is rotatably connected to the fixed base (1) via a rotating connecting tube (13); the rotating connecting tube (13) is arranged around the outside of the adjusting disk (4); and the injection check valve (74) is located outside the rotating connecting tube (13).

4. A method for producing and processing a fire-resistant cable according to claim 2, characterized in that: A transmission gear (31) is meshed with one side of the driving gear (3); the transmission gear (31) is in driving connection with the output shaft of the first driving motor (5).

5. A method for producing and processing a fire-resistant cable according to claim 2, characterized in that: Extension portions (78) are provided on both sides of the blocking piece (76); the extension portions (78) extend to both sides of the coating cylinder (7) and are connected to the first end of the second spring (79); the second end of the second spring (79) is connected to a fixing piece (710) provided on the outer peripheral surface of the coating cylinder (7).

6. A method for producing and processing a fire-resistant cable according to claim 2, characterized in that: The moving mechanism comprises a screw rod (81); the screw rod (81) is rotatably arranged on the mounting base (8) and driven to rotate by a second drive motor (82) arranged on the mounting base (8); a sliding connection part (92) is arranged on the sliding base (9); the sliding connection part (92) is threadedly connected to the screw rod (81).

7. A method for producing and processing a fire-resistant cable according to claim 6, characterized in that: The sliding base (9) is an L-shaped sliding base; the L-shaped sliding base comprises a horizontal arm and a vertical arm; the filling head (10) is arranged at the end of the horizontal arm; the pull rod (11) is arranged at the bottom end of the vertical arm, and the sliding connection part (92) is located in the middle of the vertical arm.

8. A method for producing and processing a fire-resistant cable according to claim 7, characterized in that: The filling head (10) is lifted and lowered by a lifting mechanism; the lifting mechanism comprises a base plate (101); a lifting cylinder (102) is arranged on the base plate (101); the end of the piston rod of the lifting cylinder (102) is connected to a sliding block (103) that is slidably matched with the base plate (101); and the filling head (10) is connected to the sliding block (103).

9. A method for producing and processing a fire-resistant cable according to claim 7, characterized in that: The pull rod (11) is telescopically extendable through a telescopic mechanism; the telescopic mechanism comprises a telescopic cylinder (111); the telescopic cylinder (111) is fixed to the bottom end of the vertical arm, and its piston rod is connected to the pull rod (11) to drive the pull rod (11) to move.

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