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CN-121148795-B - Rigid mineral insulation fireproof cable and manufacturing process thereof

CN121148795BCN 121148795 BCN121148795 BCN 121148795BCN-121148795-B

Abstract

The invention discloses a rigid mineral insulation fireproof cable and a manufacturing process thereof, and relates to the technical field of fireproof cables, and the rigid mineral insulation fireproof cable comprises the following steps of S1, respectively conveying a conductor and a copper strip into a transverse bending frame from the top end of a continuous conveying frame, clamping and conveying the copper strip through a bending conveying roller, bending the copper strip into a U shape, S2, utilizing a blanking connecting channel, a uniform conveying pipe and a feeding arc plate to be matched, conveying magnesia powder between the conductor and the copper strip in the bending conveying process, S3, and then enabling the conductor to pass through a positioning clamping cylinder.

Inventors

  • TANG YUGENG
  • YANG ZIPENG
  • YANG LEJIA

Assignees

  • 沈宁电缆有限公司

Dates

Publication Date
20260508
Application Date
20251105

Claims (10)

  1. 1. The rigid mineral insulation fireproof cable manufacturing equipment is characterized by comprising a continuous conveying frame (1), wherein a mounting vertical base plate (2) is mounted on the inner wall of the continuous conveying frame (1), a continuous bending and filling mechanism (3) is arranged inside the continuous conveying frame (1), and the continuous bending and filling mechanism (3) comprises a positioning deviation prevention frame (301); The automatic feeding device is characterized in that the inner wall of the continuous conveying frame (1) is provided with positioning deviation prevention frames (301) in an equidistant clamping mode, a positioning clamping cylinder (330) is clamped in one positioning deviation prevention frame (301), a clamping adjusting frame (302) is clamped in the inner wall of the positioning clamping cylinder (330), a lifting pushing rod (303) is connected in the clamping adjusting frame (302), clamping pushing blocks (304) are symmetrically sleeved on the outer sides of the lifting pushing rods (303), and two ends of each clamping pushing block (304) are connected with rotary supporting plates (305); The top end of the lifting pushing rod (303) is clamped with a driven friction wheel (307), and the top end of the positioning clamping cylinder (330) is connected with a rotary adjusting ring (308); The other positioning deviation-preventing frame (301) is internally clamped with a filler leakage-preventing cylinder (309); The two positioning anti-deflection frames (301) are internally and movably connected with concave shaft seats (310), the interiors of the concave shaft seats (310) are rotationally connected with attaching clamping rollers (311), and tightening supporting springs (312) are clamped between the concave shaft seats (310) and the positioning anti-deflection frames (301) at equal intervals; a storage drying cylinder (313) is clamped at one side of the top end of the continuous conveying frame (1), a discharging connecting channel (314) is clamped at the bottom end of the storage drying cylinder (313), a uniform conveying pipe (315) is clamped at the other end of the discharging connecting channel (314), and a feeding arc plate (316) is clamped at the other end of the uniform conveying pipe (315) corresponding to the inside of the positioning clamping cylinder (330); The automatic bending machine is characterized in that a transverse bending frame (323) is clamped at the top end of the inner wall of the continuous conveying frame (1) at equal intervals, the transverse bending frame (323) is clamped at the inner position of the inner wall of the continuous conveying frame (1) corresponding to the vertical base plate (2), two ends of the transverse bending frame (323) are respectively and rotatably connected with a two-way adjusting screw rod (324), sliding adjusting shaft seats (325) are symmetrically sleeved on the outer sides of the two-way adjusting screw rods (324) through threads, and bending conveying rollers (326) are respectively and rotatably connected between the two opposite sliding adjusting shaft seats (325); The two bending conveying rollers (326) are positioned in the transverse bending frames (323) above the positioning deviation-preventing frame (301), the thicknesses of the two bending conveying rollers (326) are unequal, and the thicknesses of the two bending conveying rollers (326) are equal in the transverse bending frames (323) on the mounting vertical backing plate (2); A polishing and traction compaction mechanism (4) is arranged at the bottom of the inner wall of the continuous conveying frame (1), and the polishing and traction compaction mechanism (4) comprises a polishing impurity removal box (401); the bottom of one end of the mounting vertical base plate (2) is clamped with a grinding impurity removal box (401), and one end of the grinding impurity removal box (401) is rotationally connected with an inner cross shaft (402) at equal intervals; An efficient grinding motor (403) is installed at one end of the grinding impurity removal box (401), and a power transmission gear (404) is fixedly sleeved on the outer side of an output shaft of the efficient grinding motor (403) and the outer side of the inner cross shaft (402); The two inner cross shafts (402) are internally and movably connected with a cross supporting rod (405), the other end of the cross supporting rod (405) is clamped with a polishing wheel (406), one end of the polishing wheel (406) and the inner wall of the grinding impurity removal box (401) are both rotationally connected with an annular rotating pad (407), and a tensioning pushing spring (408) is clamped between the two annular rotating pads (407); Both ends of the grinding impurity removal box (401) are respectively clamped with a slag discharge slideway (409); A traction bracket (410) is clamped at the bottom position of the inner wall of the continuous conveying frame (1) corresponding to the grinding impurity removal box (401), and one end of the traction bracket (410) is connected with a traction driving motor (411) through a bolt; Traction support (410) other end symmetry rotation is connected with traction bull stick (412), and two traction bull stick (412) outside has all fixedly sleeved with traction delivery wheel (413), two traction bull stick (412) outside has all fixedly sleeved with synchronous drive gear (414).
  2. 2. The manufacturing equipment of the rigid mineral insulated fireproof cable according to claim 1, wherein the inner wall of the blanking connecting channel (314) and the inner wall of the uniform conveying pipe (315) are respectively clamped with a cross fixing frame (317), the inside of the cross fixing frame (317) on the blanking connecting channel (314) and the inside of the cross fixing frame (317) on the uniform conveying pipe (315) are respectively and rotatably connected with a power transmission rod (318), the adjacent ends of the two power transmission rods (318) are respectively clamped with a conical transmission gear (319), and the top end of the storage drying cylinder (313) is connected with a filler conveying motor (320) through bolts; A protective sealing cylinder (321) is arranged between the two cross fixing frames (317) and corresponds to the outer side position of the power transmission rod (318), and a spiral feeding plate (322) is fixedly sleeved at the outer side bottom position of the power transmission rod (318) on the uniform conveying pipe (315).
  3. 3. The manufacturing equipment of the rigid mineral insulated fireproof cable according to claim 2, wherein one end of the installation vertical base plate (2) is symmetrically and rotationally connected with a bending drum wheel (327) at equal intervals, one end of the continuous conveying frame (1) is clamped with a splicing welding frame (328), and a high-frequency argon arc welding joint (329) is installed inside the splicing welding frame (328).
  4. 4. A rigid mineral insulated fireproof cable manufacturing apparatus according to claim 3, wherein the high frequency argon arc welding joint (329) is powered by an external power source.
  5. 5. The device for manufacturing the rigid mineral insulated fireproof cable according to claim 1, wherein the top end of the traction bracket (410) is clamped with an L-shaped positioning plate (415), one end of the L-shaped positioning plate (415) is symmetrically and rotatably connected with a swinging rotating shaft (416), one end of the swinging rotating shaft (416) is clamped with a swinging hammer rod (417), and the bottom end of the swinging hammer rod (417) is clamped with a counterweight hammering ball (418); swing rotary top blocks (419) are clamped at the positions, corresponding to one side of the synchronous transmission gear (414), on the outer side of the traction rotating rod (412), and swing pulling sheets (420) are clamped at the bottom ends of the two swing rotating shafts (416).
  6. 6. The manufacturing equipment of the rigid mineral insulated fireproof cable according to claim 5, wherein one end of the inner cross shaft (402) is embedded into the grinding impurity removal box (401), the high-efficiency grinding motor (403) is powered by an external power supply, and the high-efficiency grinding motor (403) is powered by the external power supply; the output shaft of the traction driving motor (411) is connected with one end of a traction rotating rod (412), the traction driving motor (411) is powered by an external power supply, a rubber ring is sleeved on the outer side of the traction conveying wheel (413), and the swing rotating top block (419) and the swing pulling piece (420) are located on the same vertical plane.
  7. 7. A process for manufacturing a rigid mineral insulated fireproof cable, according to claim 6, characterized by comprising the steps of: s1, conveying a lead body (5) and a copper strip into a transverse bending frame (323) from the top end of a continuous conveying frame (1), clamping and conveying the copper strip through a bending conveying roller (326), and bending the copper strip into a U shape; s2, conveying magnesia powder between a conductor and a copper strip in the bending conveying process by utilizing the cooperation of a blanking connecting channel (314), a uniform conveying pipe (315) and a feeding arc plate (316); S3, enabling the lead body (5) to pass through the inside of the positioning clamping cylinder (330), enabling the copper strip to pass through the outside of the positioning clamping cylinder (330), clamping and positioning, clamping between the bending cylinder wheels (327), bending to form a copper pipe, and welding a seam through a high-frequency argon arc welding joint (329); s4, the welded copper strips pass through a grinding impurity removal box (401), and the welded salient points are polished through the cooperation of a high-efficiency grinding motor (403), an inner cross shaft (402), a cross support rod (405) and a polishing wheel (406); s5, clamping and conveying the formed cable by utilizing the cooperation of the traction conveying wheel (413) and the traction driving motor (411), and then pushing the swing plectrum (420), the swing rotating shaft (416) and the swing hammer rod (417) to be opened in a rotating way through the swing rotating top block (419).
  8. 8. The manufacturing process of the rigid mineral insulated fireproof cable according to claim 7, wherein the bending angle of the copper strip of the S1 is controlled to be 80-120 degrees; The filling rate of the S2 magnesia powder is 1.0-2.5 kg/min, the temperature of the conductor is kept not to exceed 60 ℃ in the filling process, and the magnesia powder is used after being dried at 150-200 ℃; And the welding current of the S3 high-frequency argon arc welding is controlled to be 180-220A, and the welding speed is 8-12 m/min, so that the compactness of a welding seam and the minimum welding stress are ensured.
  9. 9. The process for manufacturing the rigid mineral insulated fireproof cable according to claim 8, wherein the S5 traction conveying wheel has a linear speed of 5-10 m/min and a traction tension of 40-60N; the swinging beating frequency is controlled to be 100-300 times/min, and the beating angle is 15-30 degrees.
  10. 10. The rigid mineral insulated fireproof cable produced by the rigid mineral insulated fireproof cable manufacturing process according to claim 9 is characterized in that a flame-retardant inner sheath (6) is sleeved outside the wire body (5), a copper strip body (7) is sleeved outside the wire body (5), a flame-retardant outer sheath (8) is sleeved on the inner wall of the copper strip body (7), and reinforcing iron wire frames (9) are clamped on the inner wall of the flame-retardant outer sheath (8) and the outer side of the flame-retardant inner sheath (6); A magnesia powder filling layer (10) is filled between the flame-retardant inner sheath (6) and the flame-retardant outer sheath (8); The wire body (5) outside both ends all activity has cup jointed external screw thread cover (11), internal screw thread section of thick bamboo (12) have been cup jointed through the screw thread in external screw thread cover (11), and internal screw thread section of thick bamboo (12) are connected with sealed waterproof ring (13), wire body (5) outside corresponds external screw thread cover (11) one side position department and winds has sealed winding sticky tape (14).

Description

Rigid mineral insulation fireproof cable and manufacturing process thereof Technical Field The invention relates to the technical field of fireproof cables, in particular to a rigid mineral insulation fireproof cable and a manufacturing process thereof. Background The rigid mineral insulated fireproof cable is a top-grade fireproof cable designed for extreme conditions, and is characterized in that inorganic mineral magnesium oxide is used as an insulating material, and a seamless copper pipe is used as a power supply for wrapping a sheath, such as a production line of the mineral insulated fireproof cable disclosed in the prior art, the application number is CN201821349086.9, and the cable is drawn through two different straight-drawing machine cables, so that the cable is applicable to semi-finished cables with different radiuses and drawing forces; However, in the existing mineral insulated fireproof cable, the conductor and the copper strip are inconvenient to position during production, and the magnesium oxide powder is uniformly filled, so that the cable production effect is affected, meanwhile, the phenomena of blockage and scattering are easy to occur, and waste is caused, so that in order to avoid the technical problems, it is necessary to provide a rigid mineral insulated fireproof cable and a manufacturing process thereof to overcome the defects in the prior art. Disclosure of Invention The invention provides a rigid mineral insulation fireproof cable and a manufacturing process thereof, which can effectively solve the problems that the conductor and the copper strip are inconvenient to position and are uniformly filled with magnesia powder, the production effect of the cable is affected, and meanwhile, the phenomena of blockage and sprinkling are easy to occur, so that the waste is caused. In order to achieve the purpose, the invention provides the following technical scheme that the manufacturing process of the rigid mineral insulated fireproof cable comprises the following steps: S1, respectively conveying a conductor and a copper strip from the top end of a continuous conveying frame into a transverse bending frame, clamping and conveying the copper strip through a bending conveying roller, and bending the copper strip into a U shape; S2, conveying magnesia powder between a conductor and a copper strip in the bending conveying process by utilizing the cooperation of a blanking connecting channel, a uniform conveying pipe and a feeding arc plate; s3, enabling the conductor to pass through the inside of the positioning clamping cylinder, enabling the copper strip to pass through the outside of the positioning clamping cylinder, clamping and positioning, clamping between the bending cylinder wheels, bending to form a copper pipe, and welding a gap through a high-frequency argon arc welding joint; s4, the welded copper strips pass through a grinding impurity removal box, and the welded salient points are polished by the cooperation of a high-efficiency grinding motor, an inner cross shaft, a cross support rod and a polishing wheel; s5, clamping and conveying the formed cable by utilizing the cooperation of the traction conveying wheel and the traction driving motor, and then pushing the swing plectrum, the swing rotating shaft and the swing hammer rod to rotate and open through the swing rotating jacking block. According to the technical scheme, the bending angle of the copper strip of the S1 is controlled to be 80-120 degrees; The filling rate of the S2 magnesia powder is 1.0-2.5 kg/min, the temperature of the conductor is kept not to exceed 60 ℃ in the filling process, and the magnesia powder is used after being dried at 150-200 ℃; And the welding current of the S3 high-frequency argon arc welding is controlled to be 180-220A, and the welding speed is 8-12 m/min, so that the compactness of a welding seam and the minimum welding stress are ensured. According to the technical scheme, the linear speed of the S5 traction conveying wheel is 5-10 m/min, and the traction tension is kept at 40-60N; the swinging beating frequency is controlled to be 100-300 times/min, and the beating angle is 15-30 degrees. According to the technical scheme, the linear speed of the S5 traction conveying wheel is 5-10 m/min, and the traction tension is kept at 40-60N so as to ensure continuous and stable cable molding; The swing beating frequency is controlled to be 100-300 times/min, and the beating angle is 15-30 degrees, so that the high-densification filling of the magnesia powder is realized. According to the technical scheme, the inner wall of the continuous conveying frame is provided with the mounting vertical base plate, the continuous bending and filling mechanism is arranged in the continuous conveying frame and comprises a positioning deviation-preventing frame; The inner wall of the continuous conveying frame is fixedly connected with a locating deviation preventing frame in an equidistant clamping manner, a