A BTTRZ corrugated copper sheathed mineral insulated fireproof cable production line

Abstract

The application discloses a BTTRZ corrugated copper sheath mineral insulated fireproof cable production line, which comprises a wire core pay-off machine, a copper strip winding reel, a traction machine, a corrugating machine, an extruding machine and a take-up machine, and the wire core pay-off machine, the traction machine, the corrugating machine and the extruding machine are sequentially arranged from the copper strip winding reel to the take-up machine, a copper pipe cable core forming device for pressing the copper strip into a copper pipe is arranged between the copper strip winding reel and the traction machine, the copper pipe cable core forming device comprises a supporting table and a copper strip edge cutting unit, a copper strip forming pipe unit and a copper pipe welding and coating unit which are sequentially arranged on the supporting table from the copper strip winding reel to the traction machine, and a copper strip wire winding reel is arranged between the copper strip winding reel and the copper pipe cable core forming device. The application can quickly cut the edges of the copper strip, roll and form the copper strip into a copper pipe, weld the cable core in the copper pipe to form a copper sheath, and accurately and stably control the copper pipe forming, thereby improving the cable production quality.

Description

Technical Field

[0001] This invention belongs to the technical field of cable production equipment, specifically relating to a BTTRZ corrugated copper sheath mineral insulated fireproof cable production line. Background Technology

[0002] BTTRZ mineral-insulated cable is a high-performance fire-resistant cable. It is a cable in which the insulated core unit is wrapped with a copper sheath and the core conductor is isolated from the sheath by inorganic insulation material. With its flexible structure, mineral insulation properties and metal sheath design, it has good insulation and efficient fire resistance, water resistance and corrosion resistance. It has the ability to continuously supply power in fire scenarios and is widely used in places with strict fire safety requirements.

[0003] The manufacturing process of BTTRZ mineral-insulated cable involves extruding copper strip around the insulated core unit to form a copper sheath, then corrugating it using a corrugating machine to create a corrugated copper sheath that covers the outside of the insulated core unit. Finally, an insulating sheath is co-extruded over the corrugated copper sheath to obtain the BTTRZ mineral-insulated cable. During production, abnormalities in copper strip cutting, traction, corrugating machine operation, or other equipment issues can occur during the forming and covering of the copper sheath. This can lead to deformation or damage to the insulated core unit. Deformed cables may experience partial discharge due to uneven electric field distribution during operation, shortening cable life and potentially causing insulation breakdown, thus affecting the safe and stable operation of the power grid. Therefore, developing a BTTRZ corrugated copper sheath mineral-insulated fire-resistant cable production line to improve the precise and stable control of copper strip forming into a corrugated copper sheath and covering the insulated core unit is of great significance for improving cable quality and production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a BTTRZ corrugated copper sheathed mineral-insulated fire-resistant cable production line. This invention can quickly cut and roll-form copper strips into copper tubes, then encase the cable core within the copper tubes and weld them to form a copper sheath. Furthermore, it can precisely and stably control the copper tube forming process, thereby improving cable production quality. To achieve the above objectives, the following technical solution is adopted: According to one aspect of the present invention, a BTTRZ corrugated copper-sheathed mineral-insulated fire-resistant cable production line is provided. The fire-resistant cable production line includes a wire core feeding machine, a copper strip winding reel, a traction machine, a corrugating machine, an extrusion machine, and a take-up machine. The wire core feeding machine, traction machine, corrugating machine, and extrusion machine are arranged sequentially from the copper strip winding reel towards the take-up machine. A copper tube cable core forming device for pressing the copper strip into a copper tube is provided between the copper strip winding reel and the traction machine. The copper tube cable core forming device includes a support platform and a winding reel for pressing the copper strip into a copper tube. A copper strip trimming unit, a copper strip forming tube unit, and a copper tube welding and covering unit are sequentially arranged on the support platform in the direction of the traction cable movement of the traction machine. A copper strip wire take-up reel is provided between the copper strip winding reel and the copper tube cable core forming device. A first guide roller for supporting the movement of the cable core is provided across the top of the copper strip winding reel. A second guide roller for supporting the movement of the cable core is provided above the copper strip wire take-up reel and the copper tube cable core forming device. A third guide roller for supporting the movement and recovery of the copper strip wire is provided below the second guide roller.

[0005] In a further preferred embodiment of the above scheme, the copper strip forming tube unit includes multiple copper strip rolling dies and multiple copper tube forming dies arranged coaxially from the copper strip trimming unit towards the copper tube welding and covering unit. Each copper strip rolling die presses the copper strip into an arc-shaped grooved copper strip with gradually decreasing curvature. The copper tube forming dies gradually extrude the arc-shaped grooved copper strip into a nearly closed copper tube. Each copper strip rolling die includes a rolling support base, an upper pressure roller and a lower die roller horizontally arranged within the rolling support. The rolling support base is horizontally fixed to the support platform, and the two ends of the rolling support base... A vertical roller support frame is provided. The two ends of the upper roller are set between two roller support frames through upper bearing seats. The two ends of the lower die roller are set between two roller support frames through lower bearing seats. A pair of lower die heads are provided on the lower die roller. A pair of upper die heads are provided on the upper roller above the pair of lower die heads. An arc-shaped concave surface is formed between the pair of lower die heads on the lower die roller. Each upper die head has an arc-shaped convex surface protruding towards the roller support frame on its outer side. The arc-shaped convex surface on the outer side of each upper die head is close to the arc-shaped concave surface of the corresponding lower die head.

[0006] In a further preferred embodiment of the above scheme, the upper bearing seats at both ends of the upper pressure roller are slidably disposed on both sides of the roller support frame, and a forming adjustment screw is respectively provided at the top of the two upper bearing seats. The lower end of the forming adjustment screw is rotatably connected to the top of the upper bearing seat, and the upper end of the forming adjustment screw extends vertically upward through the top of the roller support frame. The upper end of the forming adjustment screw is threadedly connected to the top of the roller support frame.

[0007] In a further preferred embodiment of the above scheme, a pair of upper pressure dies are bonded onto upper pressure rollers. Outer limiting sleeves are bonded onto the upper pressure rollers outside the pair of upper pressure dies, and an inner limiting assembly is bonded onto the upper pressure roller between the pair of upper pressure dies. The inner limiting assembly includes an inner limiting sleeve, an annular extrusion block, and a limiting buffer spring. The outer diameter of the inner limiting sleeve is larger than the inner diameter of the annular extrusion block, and the outer diameter of the inner limiting sleeve is smaller than the outer diameter of the annular extrusion block. The inner limiting sleeve is bonded onto the upper pressure roller between the pair of upper pressure dies, and a limiting buffer spring is fitted onto the inner limiting sleeve. Annular extrusion blocks fitted onto the upper pressure rollers are connected to both ends of the limiting buffer spring, and the annular extrusion blocks at both ends of the limiting buffer spring contact the corresponding upper pressure die.

[0008] In a further preferred embodiment of the above scheme, multiple sets of fourth guide rollers, arranged vertically and distributed vertically, are respectively provided between the front side of the first copper tube forming module and the rear side of the last copper tube forming module to support the guiding movement of the cable core. At least a vertical forming extrusion assembly and a horizontal forming extrusion assembly are arranged sequentially between the last copper tube forming module and the copper tube welding and covering unit. The copper tube welding and covering unit is arranged along the same axial direction on the rear side of the horizontal forming extrusion assembly. The copper tube forming module includes a forming support base, a gantry support frame, and a forming cylinder. The forming support base is horizontally fixed on the support platform, and the gantry support frame is vertically fixed at both ends of the forming support base. The forming cylinder is horizontally arranged inside the gantry support frame along the direction of movement of the traction cable. Buffer support assemblies are provided on the front and rear sides of the vertical forming extrusion assembly. The vertical forming extrusion assembly includes a vertical extrusion support base, an extrusion support frame, a vertical extrusion cylinder, and an extrusion cylinder. The vertical extrusion support base is horizontally fixed on the support platform. The extrusion support frame is vertically fixed at both ends of the vertical extrusion support base. The vertical extrusion cylinder is horizontally arranged in the extrusion support frame along the direction of movement of the traction cable. The vertical extrusion cylinder is composed of an upper semi-circular extrusion shell and a lower semi-circular extrusion shell that are symmetrically attached to each other. The bottom ends of the lower semi-circular extrusion shell are respectively fixed to the vertical extrusion support base between the two sides inside the extrusion support frame by a pair of vertical extrusion support members. A connecting support block is provided on the outer wall of the upper semi-circular extrusion shell along the circumferential direction. The extrusion cylinder is provided at the top of the extrusion support frame. The output shaft of the extrusion cylinder extends vertically downward into the extrusion support frame and connects to the connecting support block on the outer wall of the top of the upper semi-circular extrusion shell. The transverse forming extrusion assembly includes a transverse extrusion support base and an extrusion cylinder. The extrusion cylinder is horizontally arranged inside the transverse extrusion support base along the direction of movement of the traction cable. An extrusion channel opening along the axial direction is provided at the top of the extrusion cylinder. The transverse extrusion support base is transversely fixed to a support platform. Extrusion limiting support plates are vertically fixed at both ends of the transverse extrusion support base. A support pad is fixed on the transverse extrusion support base between the two extrusion limiting support plates. The extrusion cylinder is arranged on the support pad between the two extrusion limiting support plates. A limiting support groove is transversely provided on the surface of the support pad. Left extrusion cylinders are respectively provided on both sides of the extrusion cylinder, vertically inserted into the limiting support groove along the inner wall of the extrusion limiting support plate. The pressure clamping plate and the right extrusion clamping plate are provided with extrusion fixing holes of different heights on the side walls of the left and right extrusion clamping plates located on the side of the extrusion limiting support plate. Threaded holes and adjustment holes distributed vertically are provided on the side walls of the two extrusion limiting support plates. The adjustment holes are opened horizontally on the side walls of the extrusion limiting support plates. The threaded holes are connected to the corresponding extrusion fixing holes on the side walls of the left and right extrusion clamping plates by fastening adjusting bolts. The adjustment holes are connected to the corresponding extrusion fixing holes on the side walls of the left and right extrusion clamping plates by horizontal adjusting bolts. The copper tube welding and covering unit is provided on the rear side of the extrusion cylinder along the same axial direction.

[0009] In a further preferred embodiment of the above scheme, the molding cylinder is composed of an upper semi-circular molding shell and a lower semi-circular molding shell that fit together. Sliding guide grooves are provided vertically on the inner walls of both sides of the gantry support frame. The lower semi-circular molding shell is fixed between the two sides of the bottom end of the gantry support frame by a horizontally arranged lower support limiting block. An upper support limiting block that can slide up and down is provided between the sliding guide grooves on both sides of the gantry support frame. The upper support limiting block is fixed on the outer peripheral wall of the upper semi-circular molding shell. An adjusting screw for adjusting the up-and-down sliding of the upper support limiting block is vertically arranged at the top of the gantry support frame.

[0010] In a further preferred embodiment of the above scheme, the buffer support assembly includes a buffer support base plate, a buffer support spring, and an arc-shaped support block disposed on the front and rear sides of the vertical forming extrusion assembly; the buffer support base plate is fixed on the support platform, the outer side walls of the front and rear ends of the arc-shaped support block are respectively connected to the buffer support spring in the vertical direction, each buffer support spring is disposed on the buffer support base plate through a buffer support column, the buffer support column is vertically fixed on the buffer support base plate, a limit support ring is disposed on the outer wall of each buffer support column, the bottom end of the buffer support spring is connected to the limit support ring, and the upper end of the buffer support spring extends along the upper end of the buffer support column and connects to the outer side wall of the arc-shaped support block; a guide support roller is transversely disposed inside the arc-shaped support block on the rear side of the vertical forming extrusion assembly.

[0011] In a further preferred embodiment of the above scheme, the copper tube welding and cladding unit includes a welding assembly and a cladding assembly. The welding assembly includes a welding support frame, a welding torch body, a movable push rod, and a movable support rod extending from the welding support frame toward the cladding assembly to support the welding torch body, all mounted on a support platform along the direction of movement of the traction cable. An upper support guide rod and a lower support guide rod are mounted on the welding support frame along the direction of movement of the traction cable. An upper sliding bearing is mounted on the upper support guide rod, and a lower sliding bearing is mounted on the lower support guide rod. A connecting rod is fixedly connected between the two ends of the upper and lower sliding bearings. A movable support plate is provided on one side of the support frame. One end of the movable push rod is fixed to one side of the movable support plate. A touch display is provided on the other side surface of the movable support plate. The other end of the movable push rod is connected to the connecting rod. A movable support seat is provided on the lower sliding bearing. A movable support rod is provided on the movable support seat, extending directly above the covering assembly to support the welding gun body. The fixed end of the movable support rod is fixed to the movable support seat. A welding gun fixing assembly is provided at the free end of the movable support rod to support the welding gun body vertically extending into the covering assembly. A fixed support rod extending along the transverse forming extrusion assembly direction is fixed in the middle of the movable support rod. An adjustable support rod is provided on the fixed support rod, extending horizontally to the side above the copper tube inlet end of the copper tube welding and covering unit. One end of the adjustable support rod is slidably mounted on the fixed support rod. A high-definition camera is provided at the other end of the adjustable support rod. The high-definition camera is electrically connected to the touch display. A sliding adjustment channel is provided horizontally through the side wall of the fixed support rod. One end of the adjustment support rod passes through the sliding adjustment channel of the fixed support rod, and the other end of the adjustment support rod is provided with a support plate that is inclined along the rear side of the covering component and is used to support the high-definition camera. The coating assembly includes a welding support base, a welding coating seat, and a welding limiting support plate. The welding support base is horizontally fixed on the support platform. The welding limiting support plates are vertically fixed at both ends of the welding support base. The welding coating seat is set on the welding support base between the two welding limiting support plates. Fixing adjustment bolts for fixing the welding coating seat are set on the side walls of the two welding limiting support plates. A channel hole coaxial with the vertical extrusion cylinder and used for the movement of the copper tube is provided through the welding coating seat. A welding moving port extending along the axial direction and communicating with the channel hole is provided at the top of the welding coating seat. The welding head of the welding torch extends from the top of the welding coating seat into the welding moving port. A downward-opening groove-shaped welding cover is provided between the tops of the two welding limiting support plates. A U-shaped opening for the movement of the welding torch is provided at the top of the groove-shaped welding cover.

[0012] In a further preferred embodiment of the above scheme, one or more edge-pressing and limiting devices are respectively provided on the front and rear sides of the copper strip cutting unit. Each edge-pressing and limiting device includes a limiting support base, an edge-pressing support plate, and edge-pressing adjustment components slidably and adjustablely disposed at both ends of the edge-pressing support plate. The limiting support base is horizontally disposed on the support platform. Outer sliding support plates are provided at both ends of the limiting support base. Edge-pressing adjustment components that slide along the limiting support base are respectively disposed between both ends of the edge-pressing support plate and the outer sliding support plates. Inner sliding support plates are respectively disposed at both ends near the edge-pressing support plate. Edge-pressing adjustment components that slide along the limiting support base are respectively disposed between the outer and inner sliding support plates. Each edge-pressing adjustment component includes a sliding guide shaft, a sliding guide seat, a sliding drive seat, and a sliding adjustment screw. The sliding guide shaft is respectively disposed between both ends of the inner and outer sliding support plates. The limiting support base surface is provided with a moving guide groove extending from the inner sliding support plate to the outer sliding support plate. The sliding drive seat is slidably arranged in the moving guide groove. The sliding guide seats are respectively sleeved on the sliding guide shaft. A limiting side plate extending towards the upper edge of the pressing edge support plate is fixedly arranged between the two sliding guide seats. The lower surface of the limiting side plate is connected to the upper surface of the sliding drive seat. A limiting pressure plate is arranged on the surface of the limiting side plate. One side of the limiting pressure plate extends upward along the surface of the limiting side plate towards the pressing edge support plate. Multiple pressing edge adjusting rods are vertically arranged through the extended part of the limiting pressure plate towards the pressing edge support plate. A pressing edge plate close to the surface of the pressing edge support plate is arranged at the lower end of each pressing edge adjusting rod. A buffer spring is sleeved on the pressing edge adjusting rod between the pressing edge plate and the lower surface of the limiting pressure plate. The upper end of the buffer spring is connected to the lower surface of the limiting pressure plate, and the lower end of the buffer spring is connected to the upper surface of the pressing edge plate. A frosted layer is provided at the close position of the lower surface edge of the limiting side plate and the surface edge of the pressing support plate; a sliding adjustment screw is provided between the outer sliding support plate and the inner sliding support plate, which passes through the sliding drive seat. One end of the sliding adjustment screw is set on the inner sliding support plate through a bearing seat, and the other end of the sliding adjustment screw is threaded through and connected to the outer sliding support plate. A torsion disc is provided on the end of the sliding adjustment screw on the outer side of the outer sliding support plate.

[0013] In a further preferred embodiment of the above scheme, the welding torch fixing assembly further includes a horizontal support base. The horizontal support base is fixed at the lower end of the vertical fixing plate and extends forward. The surface of the horizontal support base has a groove for placing a fixing sleeve base. A sleeve hole for vertically mounting the welding torch body is coaxially provided at the center of the horizontal support base and the center of the fixing sleeve base, respectively. Horizontal limiting rods extending along the direction of the welding torch body are respectively provided on the upper two sides of the vertical fixing plate. A limiting sleeve guide rail is vertically provided on the surface of the vertical fixing plate between the two horizontal limiting rods. A... The device has supporting ear plates, and on the rear side wall of the fixed socket between the two supporting ear plates, there are limiting slots for vertically matching and fitting onto the limiting socket guide rail. The limiting slots and the limiting socket guide rail have trapezoidal cross-sections. At the lower end of the two supporting ear plates, there are locking interfaces extending vertically upwards. The horizontal limiting rod is locked into the locking interface. Around the edge of the socket hole at the center of the horizontal support seat, there are multiple supporting adjusting bolts that penetrate from the bottom of the horizontal support seat into the upper surface of the horizontal support seat. At the end of the supporting adjusting bolts, there are limiting support blocks, which are magnetic support blocks.

[0014] In summary, the present invention adopts the above technical solution, and the present invention has the following technical effects: (1) The present invention can quickly cut the copper strip, roll it into a copper tube, and then wrap the cable core inside the copper tube for welding and corrugation to form a corrugated copper sheath. It can accurately and stably control the forming of the copper tube, improve the generation efficiency of the corrugated copper sheath covering the insulated wire core unit, and improve the quality and production efficiency of the cable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a BTTRZ corrugated copper sheath mineral insulated fireproof cable production line according to the present invention. Figure 2 This is a schematic diagram of the overall structure of the copper tube cable core forming device of the present invention; Figure 3 This is a schematic diagram of the overall structure of the copper strip cutting unit of the present invention; Figure 4 This is a top view of the copper strip trimming unit of the present invention; Figure 5 This is a schematic diagram of the copper strip cutting unit of the present invention. Figure 6 This is a schematic diagram of the overall structure of the copper strip forming tube unit of the present invention; Figure 7 This is a schematic diagram of the overall structure of the copper strip rolling die of the present invention; Figure 8This is a front view schematic diagram of the copper strip rolling die of the present invention; Figure 9 This is a schematic diagram of the assembly structure of the upper pressure die head of the present invention; Figure 10 This is a schematic diagram of the structure of the inner limiting component of the present invention; Figure 11 This is a schematic diagram of the structure of the copper tube forming module of the present invention; Figure 12 This is a front view structural schematic diagram of the copper tube forming module of the present invention; Figure 13 This is a schematic diagram of the installation structure of the vertical forming extrusion assembly and the buffer support assembly of the present invention; Figure 14 This is a schematic diagram of the overall structure of the vertical forming extrusion assembly of the present invention; Figure 15 This is a schematic diagram of the overall structure of the transverse forming extrusion assembly of the present invention; Figure 16 This is a schematic diagram of the assembly of the transverse forming extrusion assembly of the present invention; Figure 17 This is a schematic diagram of the overall structure of the copper tube welding and covering unit of the present invention; Figure 18 This is a schematic diagram of the overall structure of the welding assembly of the present invention in the first embodiment; Figure 19 This is a schematic diagram of the body structure of the welding cover seat of the present invention; Figure 20 This is a schematic diagram of the copper tube cladding welding of the present invention; Figure 21 This is a schematic diagram of the structure of the first embodiment of the welding torch fixing assembly of the present invention; Figure 22 This is a schematic diagram of the overall structure of a second embodiment of the welding assembly of the present invention; Figure 23 This is a welding schematic diagram of a second embodiment of the welding torch fixing assembly of the present invention; Figure 24 This is a schematic diagram of the overall structure of the second embodiment of the welding torch fixing assembly of the present invention; Figure 25 This is an assembly diagram of a second embodiment of the welding torch fixing assembly of the present invention; Figure 26 This is a schematic diagram of the overall structure of the pressure edge limiting device of the present invention; Figure 27 This is a front view schematic diagram of the pressing edge limiting device of the present invention; Figure 28 This is a schematic diagram of the edge-pressing adjustment component of the present invention; In the attached diagram, 1 is a wire core feeding machine, 2 is a copper strip winding reel, 3 is a copper strip wire winding reel, 4 is a copper tube cable core forming device, 5 is a traction machine, 6 is a corrugating machine, 7 is an extrusion machine, and 8 is a take-up machine; 10 is a first conductor roller, 11 is a second guide roller, 12 is a third guide roller, 20 is a copper strip, 30 is a copper strip wire, 100 is a cable core, 40 is a support platform, 41 is a copper strip edge cutting unit, 42 is a copper strip forming tube unit, 43 is a copper tube welding and covering unit, 44 is an edge pressing and limiting device, and 45 is a cooling box. Edge trimming support base 410, copper strip edge trimming assembly 411, sliding adjustment plate 412, copper strip guide roller 4110, rear right support bearing seat 4110a, rear left support bearing seat 4110b, left front support bearing seat 4110c, right front support bearing seat 4110d, compression spring 4110e, rear support limiting plate 4111, front support limiting plate 4111a, sliding guide rail 4111b, left edge trimming adjustment rod 4111c, right edge trimming adjustment rod 4111d, edge trimming adjustment disc 4111e, left cutting roller 4112, left cutting disc 4112a, right cutting roller 4113, right cutting disc 4113a, first edge trimming limiting disc 4114, second edge trimming limiting disc 4115; Copper strip roll forming die 420, roll forming support seat 4200, roll forming support frame 4200a, upper pressure roller 4201, upper bearing seat 4201a, lower die roller 4202, lower bearing seat 4202a, lower die head 4203, arc concave surface 4203a, upper die head 4204, arc convex surface 4204a, forming adjustment screw 4205, outer limiting sleeve 4206, inner limiting assembly 4207, inner limiting sleeve 4207a, annular extrusion block 4207b, limiting buffer spring 4208c; Copper tube forming module 421, fourth guide roller 422, vertical forming extrusion assembly 423, horizontal forming extrusion assembly 424, buffer support assembly 425, forming support base 4210, gantry support frame 4211, forming cylinder 4212, upper semi-circular forming shell 4212a, lower semi-circular forming shell 4212b, lower support limit block 4213a, sliding guide groove 4213, adjusting screw 4214, vertical extrusion support base 4230, extrusion support frame 4231, vertical extrusion cylinder 4232, extrusion cylinder 4233, upper semi-circular extrusion shell 4232a, lower semi-circular extrusion shell 4232b The following components are included: extrusion support 4232c, connecting support block 4232d, transverse extrusion support base 4240, extrusion cylinder 4241, extrusion channel opening 4241a, extrusion limiting support plate 4242, support pad 4243, limiting support groove 4243a, left extrusion clamping plate 4244, right extrusion clamping plate 4245, threaded hole 4242a, adjusting hole 4242b, fastening adjusting bolt 4242c, transverse adjusting bolt 4242d, buffer support base plate 4250, buffer support spring 4251, arc-shaped support block 4252, buffer support column 4253, limiting support ring 4254, and guide support roller 4255. Welding assembly 430, covering assembly 431, welding torch fixing assembly 432, welding support frame 4300, welding torch body 4301, retaining ring 4301a, movable support rod 4302, fixed support rod 4302a, upper support guide rod 4303, lower support guide rod 4304, movable push rod 4305, upper sliding bearing 4303a, lower sliding bearing 4304a, connecting rod 4305a, movable support plate 4306, touch display 4306a, movable support base 4307; Sliding adjustment channel 4307a, adjustment support rod 4308, high-definition camera 4309, support plate 4309a, welding support base 4310, welding cover seat 4311, copper tube movement channel hole 4311a, welding movement port 4311b, welding limit support plate 4312, U-shaped opening 4312b, fixing adjustment bolt 4313; Vertical fixing plate 4320, horizontal limiting rod 4320a, limiting sleeve guide rail 4320b, horizontal support base 4321, fixed sleeve base 4322, sleeve hole 4321a, support ear plate 4322a, limiting slot 4322b, locking interface 4322c, support adjusting bolt 4323, limiting support block 4324. Limiting support base 440, pressing edge support plate 441, pressing edge adjustment assembly 442, outer sliding support plate 443, inner sliding support plate 444, sliding guide shaft 4420, sliding guide seat 4421, limiting side plate 44210a, limiting pressure plate 44210b, pressing edge adjustment rod 44210c, pressing edge plate 44210d, buffer spring 44210e, frosted layer 44210f, moving guide groove 4422, sliding drive seat 4423, sliding adjustment screw 4424, torsion plate 4425. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the present invention, and these aspects of the invention can be implemented even without these specific details.

[0017] Combination Figure 1 and Figure 2As shown, according to the present invention, a BTTRZ corrugated copper sheathed mineral insulated fire-resistant cable production line includes a wire core feeding machine 1, a copper strip winding reel 2, a traction machine 5, a corrugating machine 6, an extrusion machine 7, and a take-up machine 8. The wire core feeding machine 1, traction machine 5, corrugating machine 6, and extrusion machine 7 are arranged sequentially from the copper strip winding reel 2 towards the take-up machine 8. A copper tube cable core forming device 4 for pressing the copper strip into a copper tube is provided between the copper strip winding reel 2 and the traction machine 5. The traction machine 5 is a flat belt traction machine. The 4 includes a support platform 40 and copper strip trimming unit 41, copper strip forming tube unit 42, and copper tube welding and covering unit 43, which are sequentially arranged on the support platform 40 in the direction of cable movement from the copper strip winding reel 2 to the traction machine 5. One or more edge-pressing and limiting devices 44 are respectively provided on the front and rear sides of the copper strip trimming unit 41. A copper strip wire winding reel 3 is provided between the copper strip winding reel 2 and the copper tube cable core forming device 4. A first guide roller 10 for supporting the movement of the cable core 100 is provided across the top of the copper strip winding reel 2. A second guide roller 11 for supporting the movement of the cable core is provided above the reel 3 and the copper tube cable core forming device 4. A third guide roller 12 for supporting the movement and recovery of the copper strip 30 is provided below the second guide roller 11. The copper strip 20 is drawn out from the copper strip winding reel 2, passes through the pressing and limiting device 44 on the front side of the copper strip cutting unit 41, the copper strip cutting unit 41, the pressing and limiting device 44 on the rear side of the copper strip cutting unit 41, the copper strip forming tube unit 42, and the copper tube welding and covering unit 43 to form a near-copper tube. The cable core 100 is drawn out from the wire core feeding machine 1. The copper strip is introduced into the copper strip forming tube unit 42 via the first guide roller 10 and the second guide roller 11 and inserted into the copper tube. It is then welded by the copper tube welding and covering unit 43 to form a copper sheath. Under the traction of the corrugating machine 6, it is cooled by the cooling box 45 and then corrugated by the corrugating machine 6 to form a corrugated copper sheath. In the cooling box 45, water spray cooling and wet cotton or wet cloth are used to cool the copper tube after welding. The copper tube is then co-extruded in three layers by the extrusion machine 7 to form an outer sheath on the corrugated copper sheath to make the required cable. Finally, it is taken up by the take-up machine 8.

[0018] In this invention, combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the copper strip trimming unit 41 includes a trimming support base 410 and a copper strip trimming assembly 411 disposed on the trimming support base 410. The copper strip trimming assembly 411 is disposed on the trimming support base 410 via a laterally slidable sliding adjustment plate 412. Sliding limit plates 413 are respectively disposed at the left and right ends of the trimming support base 410, and the sliding adjustment plate 412 is disposed between the sliding limit plates 413 at both ends of the trimming support base 410. The copper strip trimming assembly 411 includes a copper strip guide roller 4110, a left cutting roller 4112, and a right cutting roller 4113. The copper strip guide roller 4110 is laterally disposed above the rear edge of the sliding adjustment plate 412. The two ends of the copper strip guide roller 4110 are disposed via the rear left and right cutting rollers 4113. Support bearing housing 4110b and rear right support bearing housing 4110a are fixed to the two end surfaces of the rear side of the sliding adjustment plate 412. The left cutting roller 4112 and right cutting roller 4113 are symmetrically arranged on the front side between the two ends of the copper strip guide roller 4110. A left front support bearing housing 4110c parallel to the rear left support bearing housing 4110b and a right front support bearing housing 4110d parallel to the rear right support bearing housing 4110a are respectively arranged on the front side of both ends of the copper strip guide roller 4110. The left end of the left cutting roller 4112 is mounted on the sliding adjustment plate 412 via the left front support bearing housing 4110c, and the right end of the right cutting roller 4113 is mounted on the sliding adjustment plate 412 via the right front support bearing housing 4110d. Above, the right end of the left cutting roller 4112 and the left end of the right cutting roller 4113 are close to each other. First cutting edge limiting disks 4114 are respectively provided at the left and right ends of the copper strip guide roller 4110. A left cutting disk 4112a is provided at the left end of the left cutting roller 4112, which is nearly tangent to the outer periphery of the copper strip guide roller 4110. A right cutting disk 4113a is provided at the right end of the right cutting roller 4113, which is nearly tangent to the outer periphery of the copper strip guide roller 4110. The left cutting disk 4112a and the right cutting disk 4113a are respectively located on one side of the inner surface of the first cutting edge limiting disks 4114 at the left and right ends of the copper strip guide roller 4110. On the left side of the left cutting disk 4112a and the right side of the right cutting disk 4113a, respectively, cutting edges are provided that are close to the outer periphery of the copper strip guide roller 4110. The first cutting edge limiting plate 4114 at both ends of the sliding adjustment plate 412 is tangent to the second cutting edge limiting plate 4115; a rear support limiting plate 4111 is provided on the rear side of the rear left support bearing seat 4110b and the rear right support bearing seat 4110a respectively; a front support limiting plate 4111a is provided on the front side of the left front support bearing seat 4110c and the front front support bearing seat 4110d respectively; a pair of sliding guide rails 4111b are respectively provided between the rear support limiting plate 4111 and the front support limiting plate 4111a at both ends of the sliding adjustment plate 412; the rear left support bearing seat 4110b and the left front support bearing seat 4110c are respectively located on both ends of the pair of sliding guide rails 4111b on the left side of the sliding adjustment plate 412.The rear right support bearing seat 4110a and the right front support bearing seat 4110d are respectively disposed on both ends of a pair of sliding guide rails 4111b on the right side of the sliding adjustment plate 412. The rear left support bearing seat 4110b and the rear right support bearing seat 4110a are respectively fixedly sleeved on the pair of sliding guide rails 4111b. The left front support bearing seat 4110c and the right front support bearing seat 4110d are respectively slidably sleeved on the corresponding pair of sliding guide rails 4111b. A left cutting edge adjusting rod 4111c is provided on the front support limiting plate 4111a on the side corresponding to the left front support bearing seat 4110c, and a right cutting edge adjusting rod 4111d is provided on the front support limiting plate 4111a on the side corresponding to the right front support bearing seat 4110d, and is movably connected to the right front support bearing seat 4110d. A cutting edge adjusting disc 4111e is provided on the outer end of the adjusting rod 4111d. A compression spring 4110e is respectively sleeved on a pair of sliding guide rails 4111b between the rear right support bearing seat 4110a and the right front support bearing seat 4110d and between the rear left support bearing seat 4110b and the left front support bearing seat 4110c. The compression spring 4110e between the rear right support bearing seat 4110a and the right front support bearing seat 4110d and between the rear left support bearing seat 4110b and the left front support bearing seat 4110c can prevent the copper strip edge thickness from being inconsistent during the cutting process. When the copper strip passes through the gap between the copper strip guide roller 4110 and the left cutting roller 4112 and the left cutting disc 4112a, it can push the left cutting roller 4112 and the right cutting roller 4113 to move. Under the action of the compression spring 4110e, the two cutting rollers can quickly return to their original positions. In this invention, during the copper strip trimming operation, the sliding adjustment plate 412 is first adjusted to a suitable position on the trimming support base 410. The position of the left cutting disc 4112a on the left cutting roller 4112 is adjusted and further fixed according to the size of the copper strip edge to be removed. Similarly, the position of the right cutting disc 4113a on the right cutting roller 4113 is adjusted and further fixed. Then, by adjusting the gap size between the left and right cutting discs 4112a and 4113a and the inner surfaces of the first trimming limiting discs 4114 at the left and right ends of the copper strip guide roller 4110, the... To achieve more precise cutting of the copper strip width by the left cutting disc 4112a and right cutting disc 4113a, the distance between the left cutting disc 4112a, right cutting disc 4113a and copper strip guide roller 4110 is adjusted according to the thickness of the copper strip. By rotating the cutting edge adjustment disc 4111e, the left cutting edge adjustment rod 4111c drives the left front support bearing seat 4110c and right front support bearing seat 4110d to slide along the corresponding sliding guide rail 4111b. The specific sliding distance can be observed from the dimensional scales on the surfaces at both ends of the sliding adjustment plate 412. When the left cutting roller 4112 and right cutting roller 4113 move,This adjusts the distance between the left cutting disc 4112a, the right cutting disc 4113a, and the copper strip guide roller 4110. The copper strip 30 passes under the left cutting roller 4112 and the right cutting roller 4113 and is confined between the two second cutting edge limiting discs 4115. The copper strip 30 then passes over the top of the copper strip guide roller 4110, and is confined between the first cutting edge limiting discs 4114 at both ends of the copper strip guide roller 4110. During the traction process, the copper strip guide roller 4110, the left cutting roller 4112, and the right cutting roller 4113 rotate synchronously, and the copper strip 30 is confined between the two first cutting edge limiting discs 4114. The copper strip is cut between two second cutting edge limiting discs 4115 and by the left cutting disc 112a and the right cutting disc 4113a. The first cutting edge limiting disc 4114 and the second cutting edge limiting disc 4115 are nearly tangent or in a tangent state, which can prevent the copper strip from being misaligned during the cutting process. The two ends of the copper strip 30 are cut between the left cutting disc 4112a and the corresponding first cutting edge limiting disc 4114, and between the right cutting disc 4113a and the corresponding first cutting edge limiting disc 4114. The cut copper strip 30 is pulled to the copper strip take-up disc 3 in front of the feeding side of the support table 40 for recycling.

[0019] In this invention, combined with Figure 1 , Figure 2 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the copper strip forming tube unit 42 includes multiple copper strip rolling dies 420 and multiple copper tube forming dies 421 arranged coaxially from the copper strip trimming unit 41 to the copper tube welding and covering unit 43. Each copper strip rolling die 420 presses the copper strip into an arc-shaped groove copper strip with a gradually decreasing curvature. The copper tube forming die 421 gradually squeezes the arc-shaped groove copper strip into a nearly closed copper tube. The copper strip rolling die 420 includes a rolling support 4200, an upper pressure roller 4201 and a lower die roller 4202 arranged laterally in the rolling support. The rolling support 4200 is laterally fixed on the support platform 40, and rolling supports are vertically arranged at both ends of the rolling support 4200. The upper pressure roller 4201 is positioned between two roller support frames 4200a via upper bearing seats 4201a at both ends, and the lower die roller 4202 is positioned between two roller support frames 4200a via lower bearing seats 4202a at both ends. A pair of lower die heads 4203 are mounted on the lower die roller 4202, and a pair of upper die heads 4204 are mounted on the upper pressure roller 4201 above the pair of lower die heads 4203. An arc-shaped concave surface 4203a is formed between the pair of lower die heads 4203 on the lower die roller 4202. Each upper die head 4204 has an arc-shaped convex surface 4204a protruding towards the roller support frame 4200a on its outer side. The arc-shaped convex surface 4204a on the outer side of the head 4204 is close to the arc-shaped concave surface 4203a of the corresponding lower die head 4203; the upper bearing seats 4201a at both ends of the upper pressure roller 4201 are slidably disposed on both sides of the roller support frame 4200a, and forming adjustment screws 4205 are respectively provided at the top of the two upper bearing seats 4201a. The lower end of the forming adjustment screw 4205 is rotatably connected to the top of the upper bearing seat 4201a, and the upper end of the forming adjustment screw 4205 extends vertically upward through the top of the roller support frame 4200a. The upper end of the forming adjustment screw 4205 is threadedly connected to the top of the roller support frame 4200a. A pair of upper die heads 4204 The upper pressure roller 4201 is fitted with an outer limiting sleeve 4206 on the outer side of the pair of upper pressure dies 4204. An inner limiting component 4207 is fitted on the upper pressure roller 4201 between the pair of upper pressure dies 4204. The dies are fitted onto the pressure rollers, so the horizontal distance between the pair of upper pressure dies 4204 can be adjusted. The adjusted upper pressure dies 4204 are then fixed onto the upper pressure roller 4201 by adjusting the position of the outer limiting sleeve 4206. The pair of upper pressure dies 4204 are fixed onto the upper pressure roller 4201 by the inner limiting component 4207 and the outer limiting sleeve 4206.The height of a pair of upper pressing dies 4204 on two roller pressing support frames 4200a is adjusted by the forming adjustment screw 4205, thereby adjusting the vertical gap between the arc-shaped convex surface 4204a on the outer periphery of the pair of upper pressing dies 4204 and the arc-shaped concave surface 4203a of the pair of lower pressing dies 4203. During the traction process of the copper strip 20, the lower pressing dies 4203 and the upper pressing dies 4204 also rotate, so that the arc-shaped convex surface 4204a rolls the flat copper strip 20 during the rotation and indents into the arc-shaped concave surface 4203a to form a concave arc-shaped copper strip. As the distance between the pair of upper pressing dies of each copper strip roller pressing die group 420 gradually decreases, the distance between the pair of lower pressing dies also gradually decreases, so that each copper strip roller pressing die group 420 gradually presses the concave arc-shaped copper strip into a tubular shape.

[0020] In this invention, such as Figure 8 , Figure 9 and Figure 10 As shown, the inner limiting assembly 4207 includes an inner limiting sleeve 4207a, an annular extrusion block 4207b, and a limiting buffer spring 4207c. The outer diameter of the inner limiting sleeve 4207a is larger than the inner diameter of the annular extrusion block 4207b, and the outer diameter of the inner limiting sleeve 4207a is smaller than the outer diameter of the annular extrusion block 4207b. The inner limiting sleeve 4207a is bonded to the upper pressure roller 4201 between a pair of upper pressure dies 4204. The limiting buffer spring 4207c is sleeved on the inner limiting sleeve 4207a. The annular extrusion block 4207b sleeved on the upper pressure roller 4201 is connected to both ends of the limiting buffer spring 4207c. The annular extrusion block 4207b at both ends of the limiting buffer spring 4207c is in contact or connected to the upper pressure die 4204 on the corresponding side. Adjustment is required between the pair of upper pressure dies 4204 and the upper pressure roller 4201. When the distance is 1, after pushing the upper pressure die head 4204 to slide to the predetermined position on the upper pressure roller 4201, the outer limiting sleeve 4206 is moved to the position of the upper pressure roller 4201 and then fixed to the upper pressure roller 4201 with bolts. This restricts the pair of upper pressure dies 4204 on the upper pressure roller 4201 between the inner limiting component 4207 and the outer limiting sleeve 4206. The pair of upper pressure dies 4204 roll the flat copper strip. During the process of forming the arc shape, when the arc-shaped convex surface 4204a of the upper pressure die 4204 rolls the copper strip 20, the reaction force exerted by the copper strip 20 on the arc-shaped convex surface 4204a causes the upper pressure die 4204 to push the annular extrusion block 4207b between the inner end of the upper pressure die 4204 and the end of the inner limiting sleeve 4207a and move back and forth. As a result, the upper pressure die 4204 continuously impacts and extrudes the surface of the copper strip during rotation to quickly form a concave arc shape.

[0021] In this invention, such as Figure 2 , Figure 6 , Figure 11Multiple sets of fourth guide rollers 422, arranged vertically and distributed vertically, are provided between the front side of the first copper tube forming module 421 and the rear side of the last copper tube forming module 421 to support the guiding movement of the cable core. At least a vertical forming extrusion assembly 423 and a horizontal forming extrusion assembly 424 are sequentially arranged between the last copper tube forming module 421 and the copper tube welding and covering unit 43. The copper tube welding and covering unit 43 is arranged along the same axial direction on the rear side of the horizontal forming extrusion assembly 424. The copper tube forming module 421 includes a forming support base 4210, a gantry support frame 4211, and a forming cylinder 4212. The forming support base 4210 is horizontally fixed to the support platform. On 40, the gantry support frame 4211 is vertically fixed at both ends of the forming support base 4210. The forming cylinder 4212 is horizontally arranged inside the gantry support frame 4211 along the direction of movement of the traction cable. The upper pressure die head 4204 impacts and squeezes the copper strip to form a concave arc shape and feeds it into multiple forming cylinders 4212 with gradually decreasing diameters and distributed on the same axis. The arc-shaped groove copper strip is gradually squeezed into a nearly closed copper tube. Before the arc-shaped groove copper strip is gradually squeezed into a nearly closed copper tube, the cable core 100 is introduced into the arc-shaped groove copper strip and passes through the next forming cylinder 4212 together, so that the arc-shaped groove copper strip covers the cable core 100 in the copper tube during the process of gradually closing to form the copper tube.

[0022] In this invention, such as Figure 11 and Figure 12As shown, the molded cylinder 4212 is composed of an upper semi-circular molded shell 4212a and a lower semi-circular molded shell 4212b that fit together. Sliding guide grooves 4213 are provided vertically on the inner walls of both sides of the gantry support frame 4211. The lower semi-circular molded shell 4212b is fixed between the two sides of the bottom end of the gantry support frame 4211 by a horizontally arranged lower support limiting block 4213a. An upper support limiting block 4213b that can slide up and down is provided between the sliding guide grooves 4213 on both sides of the gantry support frame 4211. The upper support limiting block 4213b is fixed to the outer peripheral wall of the upper semi-circular molded shell 4212a. An adjustment mechanism for adjusting the up-and-down sliding of the upper support limiting block 4213b is vertically provided at the top of the gantry support frame 4211. The lower end of the adjusting screw 4214 is movably connected to the top of the limiting pressure block 4213b, and the upper end of the adjusting screw 4214 extends upward through the top of the gantry support frame 4211. The upper end of the adjusting screw 4214 is threadedly connected to the gantry support frame 4211. During the extrusion process of the copper strip into a tubular shape, it is necessary to adjust the different diameters of the forming cylinder 4212 to extrude the arc-shaped copper strip during the traction process. By adjusting the adjusting screw 4214 to raise or lower the upper supporting limiting pressure block 4213b, it slides along the sliding guide grooves 4213 on both sides inside the gantry support frame 4211, thereby adjusting the distance between the lower semi-circular forming shell 4212b and the upper semi-circular forming shell 4212a, so as to adjust the diameter of the forming cylinder 4212 to gradually extrude and form the copper strip.

[0023] In this invention, such as Figure 13 and Figure 14As shown, buffer support assemblies 425 are provided on the front and rear sides of the vertical forming extrusion assembly 423. The vertical forming extrusion assembly 423 includes a vertical extrusion support base 4230, an extrusion support frame 4231, a vertical extrusion cylinder 4232, and an extrusion cylinder 4233. The vertical extrusion support base 4230 is horizontally fixed on the support platform 40, and the extrusion support frame 4231 is vertically fixed along both ends of the vertical extrusion support base 4230. The vertical extrusion cylinder 4232 is horizontally arranged inside the extrusion support frame 4231 along the direction of movement of the traction cable. 32 is composed of an upper semi-circular extrusion shell 4232a and a lower semi-circular extrusion shell 4232b that are symmetrically fitted together. The bottom ends of the lower semi-circular extrusion shell 4232b are respectively fixed to the vertical extrusion support base 4230 between the two sides inside the extrusion support frame 4231 by a pair of vertical extrusion support members 4232c. A connecting support block 4232d is provided on the outer wall of the upper semi-circular extrusion shell 4232a along the circumferential direction. The extrusion cylinder 4233 is provided at the top of the extrusion support frame 4231, and the output shaft of the extrusion cylinder 4233 extends vertically downward. The extrusion support frame 4231 is connected to the connecting support block 4232d on the top outer wall of the upper semi-circular extrusion shell 4232a. The extrusion support 4232c consists of an extrusion support column and an extrusion support spring sleeved on the extrusion support column. The bottom end of the extrusion support column is fixed on the vertical extrusion support base 4230. The upper end of the extrusion support spring extends along the upper end of the extrusion support column and connects to the bottom outer wall of the lower semi-circular extrusion shell 4232b. When the extrusion cylinder 4233 pushes the upper semi-circular extrusion shell 4232a downward and stops on the lower semi-circular extrusion shell 4232, the extrusion support is connected to the connecting support block 4232d on the top outer wall of the upper semi-circular extrusion shell 4232a. During the process of forming a cylindrical shape by extrusion on b, the arc-shaped copper strip is vertically extruded into a copper tube inside the cylinder formed by the upper semi-circular extrusion shell 4232a and the lower semi-circular extrusion shell 4232b. During this process, the extrusion support spring on the extrusion support column is compressed, and the lower semi-circular extrusion shell 4232b moves downward and approaches the top of the extrusion support column. With the extrusion support spring supporting the lower semi-circular extrusion shell 4232b upward, the copper tube is vertically extruded into shape in the circular space formed by the lower semi-circular extrusion shell 4232b and the upper semi-circular extrusion shell 4232a during the traction movement.The extrusion cylinder 4233 pushes the connecting support block 4232d to slide vertically between the inner walls of the two sides of the extrusion support frame 4231, thereby causing the upper semi-circular extrusion shell 4232a to move vertically along with the connecting support block 4232d. Because the copper strip, when rolled to form an open copper tube, has an outward-opening elastic force, as the copper tube moves through the circular space formed by the upper semi-circular extrusion shell 4232a and the lower semi-circular extrusion shell 4232b, the upper semi-circular extrusion shell 4232a presses downwards against the top of the copper tube, performing an up-and-down impact extrusion on the copper tube, causing the copper... The tube, with its opening nearly closed, passes through the vertical extrusion cylinder 4232 and is drawn into the transverse forming extrusion assembly 424 for further extrusion. The buffer support assembly 425 includes a buffer support base plate 4250, a buffer support spring 4251, and an arc-shaped support block 4252 disposed on the front and rear sides of the vertical forming extrusion assembly 423. The buffer support base plate 4250 is fixed on the support platform 40. The outer walls of the front and rear ends of the arc-shaped support block 4252 are respectively connected to the buffer support spring 4251 in the vertical direction. Each buffer support spring 4251 is connected to a buffer support column 4. 253 is installed on the buffer support base plate 4250. The buffer support column 4253 is vertically fixed on the buffer support base plate 4250. A limit support ring 4254 is provided on the outer wall of each buffer support column 4253. The bottom end of the buffer support spring 4251 is connected to the limit support ring 4254. The upper end of the buffer support spring 4251 extends along the upper end of the buffer support column 4253 and connects to the outer wall of the arc-shaped support block 4252 to prevent the arc-shaped support block 4252 from being further pressed downward. When the arc-shaped support block 4252 is pressed downward, the buffer support... The spring 4251 is compressed, so that the outer bottom of the arc-shaped support block 4252 is close to the top of the buffer support column 4253; a guide support roller 4255 is laterally arranged inside the arc-shaped support block 4252 on the rear side of the vertical forming extrusion assembly 423. The horizontal height of the lowest position of the surface of the arc-shaped support block 4252 on the front side (inlet end) of the vertical extrusion cylinder 4232 is higher than the height of the bottom of the inner wall of the vertical extrusion cylinder 4232. The height of the guide support roller 4255 is the same as the height of the bottom of the inner wall of the vertical extrusion cylinder 4232 or the guide support roller 4255 is slightly higher by 1-3cm.During the process of the upper semi-circular extrusion shell 4232a extruding the copper tube downwards, the copper tube is pressed downwards against the arc-shaped support block 4252 at the front (inlet end) of the vertical extrusion cylinder 4232. Simultaneously, the arc-shaped support block 4252 presses downwards against the buffer support spring 4251. At this time, the arc-shaped support block 4252 at the front (inlet end) of the vertical extrusion cylinder 4232, together with the upper semi-circular extrusion shell 4232a and the lower semi-circular extrusion shell 4232b, jointly extrudes the copper tube. A guide support roller 4255 is laterally arranged on the arc-shaped support block 4252 at the rear (outlet end) of the vertical extrusion cylinder 4232. The copper tube rests on the guide support roller 4255. During the upward traction and movement, the arc-shaped support block 4252 at the rear (exit end) of the vertical extrusion cylinder 4232 is simultaneously pressed downwards. This causes the arc-shaped support block 4252 to press downwards against the buffer support spring 4251, which in turn reacts to the arc-shaped support block 4252 at the rear (exit end) of the vertical extrusion cylinder 4232, pressing upwards against the copper tube. When the rolled arc-shaped copper strip is vertically extruded and formed in the vertical extrusion cylinder 4232, it is simultaneously compressed by the arc-shaped support blocks 4252 at both ends of the vertical extrusion cylinder 4232, rapidly forming a copper tube. This also prevents the opening of the formed copper tube from opening.

[0024] In this invention, such as Figure 6 , Figure 15 and Figure 16As shown, the transverse forming extrusion assembly 424 includes a transverse extrusion support base 4240 and an extrusion cylinder 4241. The extrusion cylinder 4241 is horizontally arranged within the transverse extrusion support base 4240 along the direction of the traction cable movement. An extrusion channel opening 4241a along the axial direction is provided at the highest position of the top of the extrusion cylinder 4241. The extrusion cylinder 4241 is an elastic circular cylinder. The transverse extrusion support base 4240 is transversely fixed to the support platform 40. A compression limiting support plate 4242 is vertically fixed at both ends. A support pad 4243 is fixed on a transverse compression support base 4240 between the two compression limiting support plates 4242. The compression cylinder 4241 is set on the support pad 4243 between the two compression limiting support plates 4242. A limiting support groove 4243a is transversely provided on the surface of the support pad 4243. A limiting support groove 4243a is provided on both sides of the compression cylinder 4241, which is vertically inserted into the limiting support groove 424 along the inner wall of the compression limiting support plate 4242. The left extrusion clamping plate 4244 and the right extrusion clamping plate 4245 within 3a have extrusion fixing holes 4246 of different heights on the side walls of the left extrusion clamping plate 4244 and the right extrusion clamping plate 4245, which are located on the side of the extrusion limiting support plate 4242. Threaded holes 4242a and adjusting holes 4242b are provided on the side walls of the two extrusion limiting support plates 4242, distributed vertically from top to bottom. The adjusting holes 4242b are horizontally open on the extrusion limiting support plate 424. On the side wall of 2, the threaded hole 4242a is connected to the corresponding extrusion fixing hole 4246 on the left extrusion clamping plate 4244 and the right extrusion clamping plate 4245 through the fastening adjusting bolt 4242c. The adjusting hole 4242b is connected to the corresponding extrusion fixing hole 4246 on the left extrusion clamping plate 4244 and the right extrusion clamping plate 4245 through the transverse adjusting bolt 4242d. The copper tube welding and covering unit 43 is set on the rear side of the extrusion cylinder 4241 along the same axial direction.After the left extrusion clamping plate 4244 and the right extrusion clamping plate 4245 horizontally clamp the extrusion cylinder 4241, the lower ends of the left extrusion clamping plate 4244 and the right extrusion clamping plate 4245 are placed in the limiting support groove 4243a of the support pad 4243, so that a gap is formed between the outer wall of the left extrusion clamping plate 4244 and the outer wall of the right extrusion clamping plate 4245 and the inner wall of the corresponding extrusion limiting support plate 4242. The left extrusion clamping plate 4244 and the right extrusion clamping plate 4245 are adjusted in the limiting support groove 4243a. After determining the horizontal and vertical positions within 43a, use adjusting bolts 4242c to secure the left extrusion clamping plate 4244 and the right extrusion clamping plate 4245 through the extrusion limiting support plate 4242 and fasten them to the threaded hole 4242a. Then, use lateral adjusting bolts 4242d to secure the left extrusion clamping plate 4244 and the right extrusion clamping plate 4245 through the extrusion limiting support plate 4242 and fasten them to the adjusting hole 4242b. Since the extrusion cylinder 4241 is an elastic circular cylinder, by adjusting bolts 4242c and lateral adjusting bolts 4242d, the left extrusion clamping plate 4244 and the right extrusion clamping plate 4245 are continuously adjusted to compress and adjust the size of the extrusion channel opening 4241a of the extrusion cylinder 4241 in the lateral direction, so that the copper tube being extruded is extruded to the required size when passing through the extrusion cylinder 4241.

[0025] In this invention, such as Figure 17 , Figure 18 , Figure 19 and Figure 20As shown, the copper tube welding and coating unit 43 includes a welding assembly 430 and a coating assembly 431. The welding assembly 430 includes a welding support frame 4300, a welding torch body 4301, a movable push rod 4305, and a movable support rod 4302 extending from the welding support frame 4300 toward the coating assembly 431 to support the welding torch body 4301. An upper support guide rod 4303 and a lower support guide rod 4304 are provided on the welding support frame 4300 and along the traction cable movement direction. An upper sliding bearing 4303a is provided on the upper support guide rod 4303, and a lower sliding bearing 4304a is provided on the lower support guide rod 4304. A connecting rod 4305a is fixedly connected between the two ends of the upper sliding bearing 4303a and the lower sliding bearing 4304a. A movable support plate 4306 is provided on one side of the frame 4300. One end of the movable push rod 4305 is fixed to one side of the movable support plate 4306. A touch display 4306a is provided on the other side surface of the movable support plate 4306. The other end of the movable push rod 4305 is connected to the connecting rod 4305a. A movable support seat 4307 is provided on the lower sliding bearing 4304a. A movable support rod 4302 is provided on the movable support seat 4307, extending directly above the covering assembly 431 to support the welding torch body 4301. The fixed end of the movable support rod 4302 is fixed to the movable support seat 4307. A welding torch fixing assembly 432 is provided at the free end of the movable support rod 4302 to support the welding torch body 4301, vertically extending into the covering assembly 431. Figure 21As shown, the welding torch fixing assembly 432 includes a vertical fixing plate 4320 and a fixing sleeve 4322. The vertical fixing plate 4320 is vertically fixed to the free end of the movable support rod 4302, and the fixing sleeve 4322 is horizontally fixed to the front side wall of the vertical fixing plate 4320. A sleeve hole 4321a for vertically installing the welding torch body 4301 is provided in the center of the fixing sleeve 4322. A sleeve flange 4321b is provided on the surface of the fixing sleeve 4322 outside the edge of the sleeve hole 4321a. When the welding torch body 4301 is installed in the fixing sleeve 4322, the welding torch body 4301 is vertically inserted downward into the sleeve hole 4321a in the center of the fixing sleeve 4322, so that the welding torch body 4301 is... The retaining ring 4301a on the wall is connected to the sleeve flange 4321b on the outer edge of the sleeve hole 4321a. The retaining ring 4301a is sleeved inside the sleeve flange 4321b, so that the welding torch body 4301 can be quickly installed on the fixed sleeve seat 4322, and the welding torch body 4301 can be quickly disassembled, maintained and replaced. The welding torch body 4301 is vertically arranged on the free end of the movable support rod 4302 and extends into the covering assembly 431. A fixed support rod 4302a extending along the transverse forming extrusion assembly 424 is fixed in the middle of the movable support rod 4302. An adjusting support rod is arranged on the fixed support rod 4302a and extends horizontally to the side above the copper tube inlet end of the copper tube welding covering unit 43. 4308, one end of the adjusting support rod 4308 is slidably mounted on the fixed support rod 4302a, and a high-definition camera 4309 is mounted on the other end of the adjusting support rod 4308. A sliding adjustment channel 4307a is horizontally provided through the side wall of the fixed support rod 4302a, and one end of the adjusting support rod 4308 passes through the sliding adjustment channel 4307a of the fixed support rod 4302a. A support plate 4309a, inclined on the copper tube outlet end side of the covering assembly 431 welded along the copper tube, is provided at the other end of the adjusting support rod 4308 to support the high-definition camera 4309. The covering assembly 431 includes a welded support base 4310 and a welded covering seat 431. 1. Welding limiting support plate 4312, welding support base 4310 is horizontally fixed on support platform 40, welding limiting support plate 4312 is vertically fixed at both ends of welding support base 4310, welding covering seat 4311 is provided on welding support base 4310 between two welding limiting support plates 4312, fixing adjusting bolts 4313 for fixing welding covering seat 4311 are provided on the side wall of two welding limiting support plates 4312, the fixing adjusting bolts 4313 are respectively inserted into the covering positioning holes 4313a on the side wall of two welding limiting support plates 4312 for connection, thereby fixing welding covering seat 4311 on the side wall of two welding limiting support plates 4312;A channel hole 4311a, coaxial with the vertical extrusion cylinder 4232 and used for moving the copper tube, is provided through the welding cover seat 4311. A welding moving port 4311b, extending along the axial direction and communicating with the channel hole 4311a, is provided at the top of the welding cover seat 4311. The welding head of the welding torch body 4301 extends from the top of the welding cover seat 4311 into the welding moving port 4311b. A downward-opening grooved welding cover 4312a is provided between the tops of the two welding limiting support plates 4312. A U-shaped opening 4312b for moving the welding torch body 4301 is provided at the top of the grooved welding cover 4312a. In this invention, a support plate 4309a is provided at the other end of the fixed support rod 4308, inclined along the rear side of the welding cover 4311, to support the high-definition camera 4309. After fixing the high-definition camera 4309 to the support plate 4309a, the shooting position and shooting angle of the high-definition camera 4309 are adjusted. First, the connecting rod 4305a is pushed by the telescopic action of the moving push rod 4305 (telescopic cylinder), so that when the upper sliding bearing 4303a and the lower sliding bearing 4304a slide on the upper support guide rod 4303 and the lower support guide rod 4304 respectively, the moving support rod 4302 is moved, thereby adjusting the welding torch body 4301 at the top of the grooved welding cover 4312a. The U-shaped opening 4312b stops at a certain position, and the grooved welding shield 4312a can block the sparks and flames from splashing everywhere when the welding torch body 4301 welds the copper tube. The fixed support rod 4302a is rotatably mounted on the outer wall of the middle part of the movable support rod 4302, so that the high-definition camera 4309 can be adjusted to shoot at the welding angle of the welding torch body 4301 at the welding moving port 4311b. When adjusting the position of the high-definition camera 4309 horizontally or vertically, the movable adjustment support rod 4308 moves to adjust the horizontal or vertical position in the sliding adjustment channel 4307a, so that the high-definition camera 4309 is aligned with the welding position of the welding torch body 4301 at the welding moving port 4311b, which can accurately shoot and inspect the traces of copper tube welding, such as... Figure 19 and Figure 20As shown, when the welding torch body 4301 welds the copper tube 101, as the copper tube 101 moves within the channel hole 4311a of the welding cover seat 4311, the head of the welding torch body 4301 extends into the welding moving port 4311b at the top of the welding cover seat 4311 to weld the opening of the copper tube 101, forming a sealed copper tube, thereby covering the cable core 100 within the copper tube 101. During welding, the weld points captured by the high-definition camera 4309 do not conform to... When required, the movable push rod 4305 pushes the connecting rod 4305a, causing the upper sliding bearing 4303a and the lower sliding bearing 4304a to slide on the upper support guide rod 4303 and the lower support guide rod 4304 respectively, thereby driving the movable support rod 4302 to move accordingly. This pushes the welding torch body 4301 to move back and forth within the range of the U-shaped opening 4312b at the top of the grooved welding cover 4312a, and the welding torch body 4301 welds the opening position of the copper tube 101.

[0026] In this invention, such as Figure 22 , Figure 23 , Figure 24 and Figure 25As shown, the welding torch fixing assembly 432 also includes a horizontal support base 4321. The horizontal support base 4321 is fixed at the lower end of the vertical fixing plate 4320 and extends forward. A fixing sleeve 4322 is provided at the center of the horizontal support base 4321. The surface of the horizontal support base 4321 has a groove for placing the fixing sleeve 4322. A sleeve hole 4321a for vertically mounting the welding torch body 4301 is coaxially provided at the center of the horizontal support base 4321 and the center of the fixing sleeve 4322. Horizontal limiting rods 4320a extending in the direction of the welding torch body 4301 are respectively provided on the upper two sides of the vertical fixing plate 4320. A limiting sleeve guide rail 4320b is vertically provided on the surface of the vertical fixing plate 4320 between the two horizontal limiting rods 4320a. A fixing sleeve guide rail 4320b is provided on the side walls on both sides of the rear end of the fixing sleeve 4322. The device is provided with a support ear plate 4322a. On the rear side wall of the fixed socket 4322 between the two support ear plates 4322a, there are respectively a limiting slot 4322b for vertical matching and sleeved on the limiting sleeve guide rail 4320b. The limiting slot 4322b and the limiting sleeve guide rail 4320b have trapezoidal cross sections. At the lower end of the two support ear plates 4322a, there are respectively a locking interface 4322c extending vertically from bottom to top. The horizontal limiting rod 4320a is locked in the locking interface 4322c. Around the edge of the socket hole 4321a in the center of the horizontal support base 4321, there are a plurality of support adjusting bolts 4323 that pass through the upper surface of the horizontal support base 4321 from bottom to top. On the end of the support adjusting bolt 4323, there are respectively a limiting support block 4324. The limiting support block 4324 is a magnetic support block.When the fixed socket 4322 is placed on the horizontal support 4321, the lower end of the limiting slot 4322b on the rear side wall of the fixed socket 4322 is inserted into the upper end of the limiting sleeve guide rail 4320b, and then slids downward along the upper end of the limiting sleeve guide rail 4320b to the lower end, so that the horizontal limiting rod 4320a is fitted into the locking interface 4322c of the support ear plate 4322a. The fixed socket 4322 is placed on the limiting support block 4324 on the surface of the horizontal support 4321. A magnetic support block is used to magnetically attach the fixing socket 4322 to the surface of the horizontal support 4321 for positioning and fixation. The rear sidewall of the fixing socket 4322 is matched and positioned onto the positioning guide rail 4320b via a positioning slot 4322b. Simultaneously, the support ear plates 4322a on both sides of the fixing socket 4322 are fitted onto the horizontal limiting rod 4320a via a locking interface 4322c, thereby preventing the fixing socket 4322 from moving on the horizontal support 4321. When necessary... When fine-tuning the height of the welding torch body 4301 on the horizontal support base 4321, first loosen the support adjustment bolts 4323 to extend upwards along the surface of the horizontal support base 4321, so that the limiting support blocks 4324 on each support adjustment bolt 4323 are on the same horizontal plane. Then, limit the fixed sleeve base 4322 and place it on the horizontal support base 4321. Then, vertically insert the welding torch body 4301 downwards into the fixed sleeve base 4322 and the central sleeve hole 4321a of the horizontal support base 4321, so that the welding torch body 4301 is externally... The retaining ring 4301a on the wall engages with the socket hole 4321a of the fixed socket 4322. Then, the retaining ring 4301a on the outer wall of the welding torch body 4301 connects to the socket flange 4321b on the outer edge of the socket hole 4321a. The retaining ring 4301a fits inside the socket flange 4321b. This invention allows for the rapid installation of the welding torch body 4301 onto the welding torch fixing assembly 432, and enables rapid height adjustment, disassembly, maintenance, and replacement of the welding torch body 4301.

[0027] In this invention, such as Figure 26 , Figure 27 and Figure 28As shown, the pressing edge limiting device 44 includes a limiting support base 440, a pressing edge support plate 441, and pressing edge adjustment components 442 that are slidably and adjustablely disposed at both ends of the pressing edge support plate 441. The limiting support base 440 is horizontally disposed on the support platform 40. Outer sliding support plates 443 are disposed at both ends of the limiting support base 440. Pressing edge adjustment components 442 that slide along the limiting support base 440 are disposed between both ends of the pressing edge support plate 441 and the outer sliding support plates 443. Limiting plate assemblies are disposed above both ends of the pressing edge support plate 441. The limiting plate assembly consists of a limiting pressure plate 44210b and a limiting side plate 44210a that are distributed vertically. Inner sliding support plates 444 are disposed at both ends near the pressing edge support plate 441. Pressing edge adjustment components 442 that slide along the limiting support base 440 are disposed between the outer sliding support plate 443 and the inner sliding support plate 444.The edge-pressing adjustment assembly 442 includes a sliding guide shaft 4420, a sliding guide seat 4421, a sliding drive seat 4423, and a sliding adjustment screw 4424. The sliding guide shaft 4420 is respectively disposed between the two ends of the inner sliding support plate 444 and the outer sliding support plate 443. A sliding guide groove 4422 extending from the inner sliding support plate 444 to the outer sliding support plate 443 is provided on the surface of the limiting support base 440 between the two sliding guide shafts 4420. The sliding drive seat 4423 is slidably disposed within the sliding guide groove 4422. The two sliding guide shafts 4420 are respectively... The sliding guide seat 4421 is fitted onto the sliding guide seat 4421. A limiting side plate 44210a extending towards the edge of the upper surface of the pressing edge support plate 441 is fixedly disposed between the two sliding guide seats 4421. The lower surface of the limiting side plate 44210a is connected to the upper surface of the sliding drive seat 4423. A limiting pressure plate 44210b is disposed on the surface of the limiting side plate 44210a. One side of the limiting pressure plate 44210b extends upward along the surface of the limiting side plate 44210a toward one side of the pressing edge support plate 441. The extended portion of the limiting pressure plate 44210b toward one side of the pressing edge support plate 441 is vertically inserted through it. There are multiple edge-pressing adjustment rods 44210c. At the lower end of each edge-pressing adjustment rod 44210c, an edge-pressing plate 44210d is provided close to the surface of the edge-pressing support plate 441. A buffer spring 44210e is sleeved on the edge-pressing adjustment rod 44210c between the lower surface of the edge-pressing plate 44210d and the limiting pressure plate 44210b. The upper end of the buffer spring 44210e is connected to the lower surface of the limiting pressure plate 44210b, and the lower end of the buffer spring 44210e is connected to the upper surface of the edge-pressing plate 44210d. The edge-pressing adjustment rods 44210c and the edge-pressing plate 44210d are connected by a universal ball joint. The connecting rod 44210c is threaded or snapped through the part of the limiting plate 44210b extending towards the center of the pressing support plate 441. The pressing plate 44210d is connected by a buffer spring 44210e. The pressing plate 44210d contacts the copper strip 20. When the copper strip 20 passes through the pressing limit device 44, it can be ensured that the copper strip is pulled along the same straight line direction, limiting the movement of the copper strip 20 in the gap between the pressing support plate 441 and the limiting plate 44210a. During the pulling process, the copper strip 20 contacts the pressing plate 44210d, so that the copper strip moves smoothly.A frosted layer 44210f is provided at the close position of the lower surface edge of the limiting edge plate 44210a and the surface edge of the pressing support plate 441. Generally, the frosted layer 44210f is only provided on the pressing limit device 44 behind the copper strip cutting unit 41 (the output side after the copper strip is cut). After the copper strip is cut, the copper strip passes through the frosted layer 44210f during the traction process to polish the edge of the copper strip, remove uneven positions and residual slag during cutting, and polish the edge of the copper strip to remove the oxidized parts, so that high-quality welding can be performed during welding. In this invention, a sliding adjustment screw 4424 is provided between the outer sliding support plate 443 and the inner sliding support plate 444, passing through the sliding drive seat 4423. One end of the sliding adjustment screw 4424 is mounted on the inner sliding support plate 444 via a bearing seat, and the other end of the sliding adjustment screw 4424 is threadedly connected to the outer sliding support plate 443. A torsion disc 4425 is provided on the end of the sliding adjustment screw 4424 on the outer side of the outer sliding support plate 443. According to the width of the copper strip, the distance that the limiting side plate 44210a and the limiting pressure plate 44210b move relative to each other on the two ends of the pressing support plate 441 can be adjusted, thereby adjusting the pressing and limiting of the copper strip 20 between the two ends of the pressing support plate 441. First, by rotating the torsion disc 4425, the sliding adjustment screw... When 4424 rotates, it drives the sliding drive seat 4423 to slide within the moving guide groove 4422. As the sliding drive seat 4423 moves, it drives the limiting side plate 44210a and the limiting pressure plate 44210b to slide along the sliding guide shaft 4420 on the limiting support base 440 via the sliding guide seat 4421. This adjusts the distance the limiting plate assemblies above both ends of the pressing edge support plate 441 move in opposite directions. Adjusting the relative movement distance of the limiting side plate 44210a and the limiting pressure plate 44210b above both ends of the pressing edge support plate 441 ensures that the edge of the copper strip is limited between the limiting side plate 44210a and the pressing edge support plate 441, and under the limiting pressure of the pressing edge plate 44210d, prevents the copper strip 20 from jumping during movement.

[0028] Combination Figure 1 and Figure 2The operation process of the cable production equipment of the present invention is further described as follows: the copper strip 20 of the required width is pulled from the copper strip winding reel 2 to the pressing and limiting device 44 on the front side of the copper strip cutting unit 41 for pressing and positioning; the copper strip cutting unit 41 cuts the edge of the copper strip; the pressing and limiting device 44 on the rear side of the copper strip cutting unit 41 presses and positions the edge; the copper strip forming tube unit 42 gradually rolls it into an arc-shaped tube strip; the cable core 100 is led out from the wire core feeding machine 1, introduced into the tube welding and covering unit 43 through the first guide roller 10 and the second guide roller 11, and then welded through the copper tube. The copper strip roll forming die 420 of the covering unit 43 is extruded into a nearly closed copper tube, which is then continuously welded by the copper tube forming die 421 to form a copper tube, thereby covering the cable core inside the copper tube. The welded copper tube is cooled by the cooling box 45, and then the copper sheath is corrugated by the corrugating machine 6 to form a corrugated copper sheath. In the cooling box 45, water spray cooling and wet cotton or wet cloth are used to cool the copper tube after welding. The extrusion machine 7 performs three-layer co-extrusion and forms an outer sheath on the corrugated copper sheath to make the required cable. Then, the cable is taken in by the take-up machine 8.

[0029] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A BTTRZ corrugated copper sheathed mineral insulated fireproof cable production line, the fireproof cable production line comprising a wire core feeding machine (1), a copper strip winding reel (2), a traction machine (5), a corrugating machine (6), an extrusion machine (7), and a take-up machine (8), wherein the wire core feeding machine (1), traction machine (5), corrugating machine (6), and extrusion machine (7) are arranged sequentially from the copper strip winding reel (2) toward the take-up machine (8), characterized in that: A copper tube cable core forming device (4) for pressing copper strip into copper tubes is provided between the copper strip winding reel (2) and the traction machine (5). The copper tube cable core forming device (4) includes a support platform (40) and a copper strip cutting unit (41), a copper strip forming tube unit (42), and a copper tube welding and covering unit (43) arranged sequentially on the support platform (40) in the direction of the copper strip winding reel (2) pulling the cable towards the traction machine (5). A copper strip winding reel (3) is provided between the forming device (4). A first guide roller (10) for supporting the movement of the cable core (100) is provided between the top ends of the copper strip winding reel (2). A second guide roller (11) for supporting the movement of the cable core is provided above the copper strip winding reel (3) and the copper tube cable core forming device (4). A third guide roller (12) for supporting the movement and recovery of the copper strip wire (30) is provided below the second guide roller (11). The copper strip forming tube unit (42) includes multiple copper strip rolling dies (420) and multiple copper tube forming dies (421) arranged sequentially along the same axis from the copper strip trimming unit (41) to the copper tube welding and covering unit (43). Each copper strip rolling die (420) presses the copper strip into an arc-shaped groove copper strip with a gradually decreasing curvature. The copper tube forming die (421) gradually squeezes the arc-shaped groove copper strip into a nearly closed copper tube. The copper strip rolling die (420) includes a rolling support base (4200), an upper pressure roller (4201) and a lower die roller (4202) arranged laterally in the rolling support. The rolling support base (4200) is laterally fixed on the support platform (40). Rolling support frames (4200a) are vertically arranged at both ends of the rolling support base (4200). The two ends of the upper pressure roller (4201) are connected by an upper bearing seat (4200a). 01a) The lower die roller (4202) is positioned between two roller support frames (4200a) via lower bearing seats (4202a). A pair of lower die heads (4203) are provided on the lower die roller (4202), and a pair of upper die heads (4204) are provided on the upper roller (4201) above the pair of lower die heads (4203). An arc-shaped concave surface (4203a) is formed between a pair of lower die heads (4203) on the lower die roller (4202). Each upper die head (4204) has an arc-shaped convex surface (4204a) protruding towards the roller support frame (4200a) on its outer side. The arc-shaped convex surface (4204a) on the outer side of each upper die head (4204) is close to the arc-shaped concave surface (4203a) of the corresponding lower die head (4203). A pair of upper pressure dies (4204) are bonded onto upper pressure rollers (4201). Outer limiting sleeves (4206) are bonded onto the upper pressure rollers (4201) outside the pair of upper pressure dies (4204). An inner limiting assembly (4207) is bonded onto the upper pressure rollers (4201) between the pair of upper pressure dies (4204). The inner limiting assembly (4207) includes an inner limiting sleeve (4207a), an annular extrusion block (4207b), and a limiting buffer spring (4207c). The outer diameter of the inner limiting sleeve (4207a) is larger than the inner diameter of the annular extrusion block (4207b). The outer diameter of the inner limiting sleeve (4207a) is smaller than the outer diameter of the annular extrusion block (4207b). The inner limiting sleeve (4207a) is bonded to the upper pressure roller (4201) between a pair of upper pressure dies (4204). A limiting buffer spring (4207c) is sleeved on the inner limiting sleeve (4207a). Annular extrusion blocks (4207b) sleeved on the upper pressure roller (4201) are respectively connected to both ends of the limiting buffer spring (4207c). The annular extrusion blocks (4207b) at both ends of the limiting buffer spring (4207c) are in contact with the upper pressure die (4204) on the corresponding side.

2. The BTTRZ corrugated copper sheathed mineral insulated fireproof cable production line according to claim 1, characterized in that, The upper bearing seats (4201a) at both ends of the upper pressure roller (4201) are slidably disposed on both sides of the roller support frame (4200a). A forming adjustment screw (4205) is respectively provided at the top of the two upper bearing seats (4201a). The lower end of the forming adjustment screw (4205) is rotatably connected to the top of the upper bearing seat (4201a), and the upper end of the forming adjustment screw (4205) extends vertically upward through the top of the roller support frame (4200a). The upper end of the forming adjustment screw (4205) is threadedly connected to the top of the roller support frame (4200a).

3. The BTTRZ corrugated copper sheathed mineral insulated fireproof cable production line according to claim 1, characterized in that, Multiple sets of fourth guide rollers (422) arranged vertically and distributed to support the guiding movement of the cable core are respectively provided between the front side of the first copper tube forming module (421) and the rear side of the last copper tube forming module (421). At least a vertical forming extrusion assembly (423) and a horizontal forming extrusion assembly (424) are arranged sequentially between the last copper tube forming module (421) and the copper tube welding and covering unit (43). A set of fourth guide rollers (422) are arranged along the same axial direction on the rear side of the horizontal forming extrusion assembly (424). The copper tube welding and covering unit (43) is described; the copper tube forming module (421) includes a forming support base (4210), a gantry support frame (4211) and a forming cylinder (4212). The forming support base (4210) is horizontally fixed on the support platform (40), and the gantry support frame (4211) is vertically fixed at both ends of the forming support base (4210). The forming cylinder (4212) is horizontally arranged inside the gantry support frame (4211) along the direction of movement of the traction cable. A buffer support assembly (425) is provided on the front and rear sides of the vertical forming extrusion assembly (423). The vertical forming extrusion assembly (423) includes a vertical extrusion support base (4230), an extrusion support frame (4231), a vertical extrusion cylinder (4232), and an extrusion cylinder (4233). The vertical extrusion support base (4230) is horizontally fixed on the support platform (40). The extrusion support frame (4231) is vertically fixed at both ends of the vertical extrusion support base (4230). The vertical extrusion cylinder (4232) is horizontally arranged inside the extrusion support frame (4231) along the direction of movement of the traction cable. The vertical extrusion cylinder (4232) consists of an upper semi-circular extrusion shell (423) that is symmetrically fitted together. It consists of 2a) and a lower semi-circular extrusion shell (4232b). The bottom ends of the lower semi-circular extrusion shell (4232b) are respectively fixed to the vertical extrusion support base (4230) between the two sides inside the extrusion support frame (4231) by a pair of vertical extrusion support members (4232c). A connecting support block (4232d) is provided on the outer wall of the upper semi-circular extrusion shell (4232a) along the circumferential direction. The extrusion cylinder (4233) is provided at the top of the extrusion support frame (4231). The output shaft of the extrusion cylinder (4233) extends vertically downward into the extrusion support frame (4231) and is connected to the connecting support block (4232d) on the top outer wall of the upper semi-circular extrusion shell (4232a). The transverse forming extrusion assembly (424) includes a transverse extrusion support base (4240) and an extrusion cylinder (4241). The extrusion cylinder (4241) is horizontally arranged inside the transverse extrusion support base (4240) along the direction of movement of the traction cable. An extrusion channel opening (4241a) along the axial direction is provided at the top of the extrusion cylinder (4241). The transverse extrusion support base (4240) is transversely fixed on the support platform (40). Extrusion limiting support plates (4242) are vertically fixed at both ends of the transverse extrusion support base (4240). A support pad (4243) is fixed on a transverse extrusion support base (4240) between two extrusion limiting support plates (4242). The extrusion cylinder (4241) is set on the support pad (4243) between the two extrusion limiting support plates (4242). A limiting support groove (4243a) is transversely provided on the surface of the support pad (4243). A left extrusion clamping plate (4241) is respectively provided on both sides of the extrusion cylinder (4241) and is vertically inserted into the limiting support groove (4243a) along the inner wall of the extrusion limiting support plate (4242). 244) and the right extrusion clamping plate (4245), on the side wall of the left extrusion clamping plate (4244) and the side wall of the right extrusion clamping plate (4245) located on the side of the extrusion limiting support plate (4242), extrusion fixing holes (4246) of different heights are respectively provided. Threaded holes (4242a) and adjusting holes (4242b) distributed vertically are provided on the side walls of the two extrusion limiting support plates (4242). The adjusting holes (4242b) are opened horizontally on the side walls of the extrusion limiting support plates (4242). The hole (4242a) is connected to the extrusion fixing hole (4246) on the corresponding side wall of the left extrusion clamping plate (4244) and the right extrusion clamping plate (4245) by fastening the adjusting bolt (4242c). The adjusting hole (4242b) is connected to the extrusion fixing hole (4246) on the corresponding side wall of the left extrusion clamping plate (4244) and the right extrusion clamping plate (4245) by transverse adjusting bolt (4242d). The copper tube welding and covering unit (43) is set on the rear side of the extrusion cylinder (4241) along the same axial direction.

4. A BTTRZ corrugated copper sheathed mineral insulated fireproof cable production line according to claim 3, characterized in that, The molded cylinder (4212) is composed of an upper semi-circular molded shell (4212a) and a lower semi-circular molded shell (4212b) that fit together. There are sliding guide grooves (4213) on the inner walls of both sides of the gantry support frame (4211) in the vertical direction. The lower semi-circular molded shell (4212b) is fixed between the two sides of the bottom end of the gantry support frame (4211) by a horizontally arranged lower support limiting block (4213a). An upper support limiting block (4213b) that can slide up and down is provided between the sliding guide grooves (4213) on both sides of the gantry support frame (4211). The upper support limiting block (4213b) is fixed on the outer peripheral wall of the upper semi-circular molded shell (4212a). An adjusting screw (4214) for adjusting the up and down sliding of the upper support limiting block (4213b) is vertically provided at the top of the gantry support frame (4211).

5. A BTTRZ corrugated copper sheathed mineral insulated fireproof cable production line according to claim 3, characterized in that, The buffer support assembly (425) includes a buffer support base plate (4250), a buffer support spring (4251), and an arc-shaped support block (4252) disposed on the front and rear sides of the vertical forming extrusion assembly (423). The buffer support base plate (4250) is fixed on the support platform (40). The outer side walls of the front and rear ends of the arc-shaped support block (4252) are respectively connected to the buffer support spring (4251) in the vertical direction. Each buffer support spring (4251) is disposed on the buffer support base plate (4250) through a buffer support column (4253). The support column (4253) is vertically fixed on the buffer support base plate (4250). A limiting support ring (4254) is provided on the outer wall of each buffer support column (4253). The bottom end of the buffer support spring (4251) is connected to the limiting support ring (4254). The upper end of the buffer support spring (4251) extends along the upper end of the buffer support column (4253) and is connected to the outer wall of the arc-shaped support block (4252). A guide support roller (4255) is horizontally arranged in the arc-shaped support block (4252) behind the vertical forming extrusion assembly (423).

6. A BTTRZ corrugated copper sheathed mineral insulated fireproof cable production line according to claim 3, characterized in that, The copper tube welding and cladding unit (43) includes a welding assembly (430) and a cladding assembly (431). The welding assembly (430) includes a welding support frame (4300) mounted on a support platform (40) along the direction of movement of the traction cable, a welding torch body (4301), a movable push rod (4305), and a movable support rod (4302) extending from the welding support frame (4300) toward the cladding assembly (431) to support the welding torch body (4301). An upper support guide rod (4303) and a lower support guide rod (4304) are provided on the welding support frame (4300) along the direction of movement of the traction cable. An upper sliding bearing (4303a) is provided on the upper support guide rod (4303), and a lower sliding bearing (4304a) is provided on the lower support guide rod (4304). A connecting rod (4305a) is fixedly connected between the two ends of the upper sliding bearing (4303a) and the lower sliding bearing (4304a). A movable support plate (4306) is provided on one side of the support frame (4300). One end of the movable push rod (4305) is fixed to one side of the movable support plate (4306). A touch display (4306a) is provided on the other side surface of the movable support plate (4306). The other end of the movable push rod (4305) is connected to the connecting rod (4305a) for transmission. A movable support seat (4307) is provided on the lower sliding bearing (4304a). A movable support rod (4302) is provided on the movable support base (4307) extending directly above the extending cover assembly (431) to support the welding gun body (4301). The fixed end of the movable support rod (4302) is fixed on the movable support base (4307), and a welding gun fixing assembly (432) is provided at the free end of the movable support rod (4302) to support the welding gun body (4301) vertically and extending into the cover assembly (431). The welding torch fixing assembly (432) includes a vertical fixing plate (4320) and a fixing socket (4322). The vertical fixing plate (4320) is vertically fixed to the free end of the movable support rod (4302). The fixing socket (4322) is horizontally fixed to the front side wall of the vertical fixing plate (4320). A socket hole (4321a) for vertically installing the welding torch body (4301) is provided in the center of the fixing socket (4322). A socket flange (4321b) is provided on the surface of the fixing socket (4322) outside the edge of the socket hole (4321a). A fixed support rod (4302a) extending along the direction of the transverse forming extrusion assembly (424) is fixed in the middle of the movable support rod (4302). An adjustable support rod (4308) is provided on the fixed support rod (4302a) extending horizontally to the side above the copper tube inlet end of the copper tube welding and covering unit (43). One end of the adjustable support rod (4308) is slidably mounted on the fixed support rod (4302a). A high-definition camera (4309) is provided at the other end of the adjustable support rod (4308). The high-definition camera (4309) is electrically connected to the touch display (4306a). A sliding adjustment channel (4307a) is horizontally provided on the side wall of the fixed support rod (4302a). One end of the adjustment support rod (4308) passes through the sliding adjustment channel (4307a) of the fixed support rod (4302a). At the other end of the adjustment support rod (4308), a support plate (4309a) is provided that is inclined along the rear side of the covering assembly (431) and is used to support the high-definition camera (4309). The covering assembly (431) includes a welding support base (4310), a welding covering seat (4311), and a welding limiting support plate (4312). The welding support base (4310) is horizontally fixed on the support platform (40). The welding limiting support plate (4312) is vertically fixed at both ends of the welding support base (4310). The welding covering seat (4311) is provided on the welding support base (4310) between the two welding limiting support plates (4312). Fixing adjustment bolts (4313) for fixing the welding covering seat (4311) are provided on the side walls of the two welding limiting support plates (4312). A channel hole (4311a) is provided through the inside of the vertical extrusion cylinder (4232) and is coaxial with the vertical extrusion cylinder (4311a) for moving the copper tube. A welding moving port (4311b) is provided at the top of the welding cover (4311) and extends along the axial direction and communicates with the channel hole (4311a). The welding head of the welding gun body (4301) extends from the top of the welding cover (4311) into the welding moving port (4311b). A groove-shaped welding cover (4312a) with an opening facing downward is provided between the tops of the two welding limiting support plates (4312). A U-shaped opening (4312b) for moving the welding gun body (4301) is provided at the top of the groove-shaped welding cover (4312a).

7. A BTTRZ corrugated copper sheathed mineral insulated fireproof cable production line according to claim 1, characterized in that, One or more edge-pressing limiting devices (44) are respectively provided on the front and rear sides of the copper strip cutting unit (41). The edge-pressing limiting device (44) includes a limiting support base (440), an edge-pressing support plate (441), and edge-pressing adjustment components (442) that are slidably and adjustablely arranged at both ends of the edge-pressing support plate (441). The limiting support base (440) is arranged laterally on the support platform (40). An outer sliding support plate (443) is provided at both ends of the limiting support base (440). An edge-pressing adjustment component (442) that slides along the limiting support base (440) is respectively provided between the two ends of the edge-pressing support plate (441) and the outer sliding support plate (443). The edge-pressing adjustment components (442) are located near the two ends of the edge-pressing support plate (441). An inner sliding support plate (444) is provided, and a pressing edge adjustment assembly (442) that slides along the limiting support base (440) is provided between the outer sliding support plate (443) and the inner sliding support plate (444). The pressing edge adjustment assembly (442) includes a sliding guide shaft (4420), a sliding guide seat (4421), a sliding drive seat (4423), and a sliding adjustment screw (4424). The sliding guide shaft (4420) is provided between the two ends of the inner sliding support plate (444) and the outer sliding support plate (443). A sliding support plate (443) that slides from the inner sliding support plate (444) to the outer sliding support plate (443) is provided on the surface of the limiting support base (440) between the two sliding guide shafts (4420). An extended movable guide groove (4422) is provided, in which the sliding drive seat (4423) is slidably disposed; the sliding guide seats (4421) are respectively sleeved on two sliding guide shafts (4420); a limiting side plate (44210a) extending toward the upper surface edge of the pressing edge support plate (441) is fixedly disposed between the two sliding guide seats (4421), the lower surface of the limiting side plate (44210a) is connected to the upper surface of the sliding drive seat (4423), a limiting pressure plate (44210b) is provided on the surface of the limiting side plate (44210a), and one side of the limiting pressure plate (44210b) extends along the surface of the limiting side plate (44210a) toward the pressing edge support plate (4423). 1) Extending from one side, multiple edge-pressing adjustment rods (44210c) are vertically inserted through the protruding part of the limiting pressure plate (44210b) towards the edge-pressing support plate (441). At the lower end of each edge-pressing adjustment rod (44210c), an edge-pressing plate (44210d) close to the surface of the edge-pressing support plate (441) is provided. A buffer spring (44210e) is sleeved on the edge-pressing adjustment rod (44210c) between the edge-pressing plate (44210d) and the lower surface of the limiting pressure plate (44210b). The upper end of the buffer spring (44210e) is connected to the lower surface of the limiting pressure plate (44210b), and the lower end of the buffer spring (44210e) is connected to the upper surface of the edge-pressing plate (44210d). A frosted layer (44210f) is provided at the close position of the lower surface edge of the limiting side plate (44210a) and the surface edge of the pressing support plate (441); a sliding adjustment screw (4424) is provided between the outer sliding support plate (443) and the inner sliding support plate (444), which passes through the sliding drive seat (4423). One end of the sliding adjustment screw (4424) is set on the inner sliding support plate (444) through a bearing seat, and the other end of the sliding adjustment screw (4424) is threaded through and connected to the outer sliding support plate (443). A torsion disc (4425) is provided on the end of the sliding adjustment screw (4424) outside the outer sliding support plate (443).

8. A BTTRZ corrugated copper sheathed mineral insulated fireproof cable production line according to claim 6, characterized in that, The welding torch fixing assembly (432) further includes a horizontal support base (4321), which is fixed to the lower end of the vertical fixing plate (4320) and extends along the front side. The surface of the horizontal support base (4321) has a groove for placing a fixing sleeve (4322). The center of the horizontal support base (4321) and the center of the fixing sleeve (4322) are respectively coaxially arranged for vertically mounting the welding torch body (4301). A socket (4321a) is provided; horizontal limiting rods (4320a) extending along the direction of the welding gun body (4301) are respectively provided on the upper two sides of the vertical fixing plate (4320); a limiting socket guide rail (4320b) is vertically provided on the surface of the vertical fixing plate (4320) between the two horizontal limiting rods (4320a); support ear plates (4322a) are respectively provided on the side walls on both sides of the rear end of the fixed socket (4322); on the two plates The rear side wall of the fixed socket (4322) between the support ear plates (4322a) is respectively provided with limiting slots (4322b) for vertical matching and sleeved on the limiting sleeve guide rail (4320b). The limiting slots (4322b) and the limiting sleeve guide rail (4320b) have trapezoidal cross-sections. At the lower end of the two support ear plates (4322a), there are respectively a locking interface (4322c) extending vertically upward. The horizontal limiting rod ( 4320a) is snapped into the card interface (4322c). Around the edge of the socket hole (4321a) in the center of the horizontal support base (4321), a plurality of support adjusting bolts (4323) are provided, which pass through the upper surface of the horizontal support base (4321) from the bottom upward. Limiting support blocks (4324) are respectively provided on the ends of the support adjusting bolts (4323). The limiting support blocks (4324) are magnetic support blocks.

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