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CN-122013165-A - Production equipment and production process for oversized-diameter steel strand

CN122013165ACN 122013165 ACN122013165 ACN 122013165ACN-122013165-A

Abstract

The invention relates to a production process of an oversized-diameter steel strand, which comprises the steps of steel strand adopting a 1X 19 wire waring structure, wherein the nominal diameter of the steel strand is 34.6mm, the production process comprises the steps of wire rod selection, detection, test, acid washing, passivation, detection, drawing, semi-finished product detection, test, stranding, stabilization treatment, layer winding, finished product detection, test, packaging and warehousing, wherein the wire rod selection process comprises four wire rods with the same grade and the same specification, the chemical components of ：C:0.84-0.860%、Si:0.75-0.79%、Mn:0.72-0.74%、P:0.008-0.012%;S:0.0045-0.005%;Cr:0.04-0.05%、Ni:0.001-0.002%、Cu:0.001-0.002%, and Fe and unavoidable impurity elements, and the tensile strength of a central wire, an inner wire, an outer wire and an outer wire after the drawing reaches 2000MPa in the drawing process. The invention has the advantage of improving the strength of the produced steel strand.

Inventors

  • LI BIN
  • SU YUWEI
  • YU HAIJUN
  • ZHAO JIANGE

Assignees

  • 天津市瑞通预应力钢绞线有限公司

Dates

Publication Date
20260512
Application Date
20241030

Claims (10)

  1. 1. The production process of the oversized steel strand is characterized by comprising the following steps of: The steel strand adopts a 1X 19 silk warrior structure, 19 wires are twisted at one time, the twisting distance is 12.5 times, the diameter of a central wire (5) is 7.71mm, the diameter of an outer thick wire (6) is 8.04mm, the diameter of an outer thin wire (8) is 6.04mm, the diameter of an inner wire (7) is 7.4mm, the nominal diameter of the steel strand is 34.6mm, the upper deviation of the nominal diameter is +0.40mm, and the lower deviation of the nominal diameter is-0.15 mm; The manufacturing process comprises the steps of wire rod selection, detection, test, acid washing, passivation, inspection, drawing, semi-finished product detection, test, stranding, stabilization treatment, layer winding, finished product detection, test, packaging and warehousing, wherein in the wire rod selection process, wire rods with the same grade and same specification are adopted for four wire distribution diameters, and the chemical components of the wire rods are ：C:0.84-0.860%、Si:0.75-0.79%、Mn:0.72-0.74%、P:0.008-0.012%;S:0.0045-0.005%;Cr:0.04-0.05%、Ni:0.001-0.002%、Cu:0.001-0.002%,, fe and unavoidable impurity elements; In the drawing process, the central wire (5) is drawn to 7.71mm from 15.0mm wire rods through 9 passes, the outer layer thick wire (6) is drawn to 8.04mm from 15.0mm wire rods through 8 passes, the inner layer wire (7) is drawn to 7.4mm from 15.0mm wire rods through 9 passes, the outer layer thin wire (8) is drawn to 6.04mm from 15.0mm wire rods through 11 passes, the tensile strength of raw materials used for four wire preparation is more than or equal to 1310MPa, and the tensile strength of the central wire (5), the inner layer wire (7), the outer layer thin wire (8) and the outer layer thick wire (6) after being drawn reaches 2000 MPa; The oversized diameter steel strand production process is applied to oversized diameter steel strand production equipment, oversized diameter steel strand production equipment includes passivation pond (1), the bottom in passivation pond (1) is equipped with hot plate (2), passivation pond (1) inside is equipped with upper guide pulley (11) that two intervals set up, and two the intermediate position of upper guide pulley (11) is equipped with lower guide pulley (12) that a plurality of intervals set up, and a plurality of lower guide pulley (12) are located two the downside setting of upper guide pulley (11), two the direction that upper guide pulley (11) kept away from each other all is equipped with heating element (3), heating element (3) are used for heating the steel strand wires that pass upper guide pulley (11) and lower guide pulley (12), two lower guide pulley (12) are connected with and are used for driving two when passivation pond (1) inside metal surface treatment agent reduces lower guide pulley (12) and hot plate (2) upward moving's lifting element (4).
  2. 2. The production process of the oversized-diameter steel strand according to claim 1, wherein the steel strand has nominal tensile strength of 1770-1960MPa, corresponding maximum force of 1395-1545kN, 0.2% yield force of 1228kN, total maximum-force elongation of 3.5% or more and straightening property of 14mm or less.
  3. 3. The production process of the oversized steel strand according to claim 1, wherein in the pickling and passivation processes, oxide skin is removed by pickling, clean water is washed after pickling, the passivation process temperature is not lower than 80 ℃, a layer of carrier is formed on the surface, and a passivation film plays a role in lubrication and rust prevention.
  4. 4. The production process of the oversized steel strand according to claim 1, wherein the twisting is performed by adopting a twisting distance of 12.5 times, a V-shaped groove design is adopted, the groove width is 38mm, the groove depth is 42mm, and the inner hole of a line pressing die adopted in the twisting process is 36mm.
  5. 5. The production process of the oversized steel strand according to claim 1, wherein in the stabilization treatment process, the tempering temperature is 405-415 ℃, the running speed of a production line is lower than 9m/min, the tension of the steel strand is controlled to be 30% -35% of the threshold force of the steel strand, and the cooling after tempering adopts a direct cooling soaking type cooling mode.
  6. 6. A process for producing oversized steel strands according to any of claims 1 to 5, characterized in that the lifting assembly (4) comprises a plurality of pressure springs (41) fixedly connected between the heating plate (2) and the inner bottom wall of the passivation pool (1).
  7. 7. The process for producing the oversized steel strand according to any one of claims 1 to 5, wherein the heating assembly (3) comprises a heating pipe (31), heating liquid is arranged inside the heating pipe (31), a fan (32) is arranged on the upper side of the heating pipe (31), and the fan (32) is used for blowing air to the steel strand on the lower side of the heating pipe (31).
  8. 8. The oversized steel strand production process according to claim 7, wherein each heating pipe (31) is bent, two ends of each heating pipe (31) are connected with the same heat exchange box (33), two cavities which are respectively communicated with two ends of each heating pipe (31) are formed in each heat exchange box (33), a push plate (332) which is in sliding abutting connection with the inner wall of each cavity is arranged in each cavity of each heat exchange box (33), each push plate (332) is penetrated and is in threaded connection with a reciprocating screw (333), the end part of each reciprocating screw (333) penetrates through the side wall of each heat exchange box (33) and is in rotary connection with the side wall of each heat exchange box (33), the middle of each upper guide wheel (11) is penetrated and is fixedly connected with an upper connecting shaft (13), each upper connecting shaft (13) is connected with the adjacent reciprocating screw (333) through a belt and a belt pulley, and a heat supply screw (34) is arranged at the bottom of each heat exchange box (33).
  9. 9. The process for producing oversized steel strands according to any one of claims 1 to 5, wherein the heating plate (2) is slidably abutted against the inner wall of the passivation pool (1), a plurality of driving screws (42) are fixedly connected to the bottom of the heating plate (2), the driving screws (42) are arranged in a one-to-one correspondence with the lower guide wheels (12), the lower end of each driving screw (42) penetrates through the bottom wall of the passivation pool (1) and is in threaded connection with a driving pulley (43), two opposite sides of each driving pulley (43) are respectively connected with a lifting pulley (44) through lifting belts (441), one side of each lifting pulley (44) is fixedly connected with a lifting screw (45), each lifting screw (45) is in threaded connection with a connecting block (46), the middle of each lower guide wheel (12) is penetrated and is in rotary connection with a lower connecting shaft (14), the end of each lower connecting shaft (14) is in rotary connection with the inside of an adjacent connecting block (46), and each lower shaft (14) is in threaded connection with one side of the adjacent connecting block (47).
  10. 10. A process for producing ultra-large diameter steel strands according to any one of claims 1 to 5, wherein a driving bevel gear (35) is fixedly connected to one side of each upper guide wheel (11), a driven bevel gear (36) is meshed with each driving bevel gear (35), and each driven bevel gear (36) is connected with an adjacent fan (32) through a belt and a belt wheel and drives the fan (32) to rotate.

Description

Production equipment and production process for oversized-diameter steel strand This patent is a divisional patent of the following invention patent. Delivery day, 2024, 10 month and 30 days Day of authorization 2026, 3 months and 3 days Patent number CN119392232B The invention discloses production equipment and production process of an oversized-diameter steel strand Technical Field The application relates to the field of mining steel strands, in particular to production equipment and production technology of an oversized-diameter steel strand. Background The steel strand is a steel product formed by twisting a plurality of steel wires, and is widely used in the fields of mines, bridges and the like where high-strength traction is required. At present, in the production process of the steel strand, the steel strand is often required to be passivated, specifically, the steel strand is soaked into a metal surface treating agent, so that the metal surface treating agent is adhered to the surface of the steel strand, and a layer of protective film is formed on the surface of the steel strand by the metal surface treating agent, thereby increasing the corrosion resistance of the steel strand. The passivation operation that adopts at present is directly placing the steel strand wires into metal surface treatment agent, but adopts above-mentioned operation, after the steel strand wires enter into the passivation pond inside many times, is difficult to the inside temperature of accuse passivation pond accurately, leads to metal surface treatment agent and steel strand wires contact cooling down, and then causes the passivation effect of steel strand wires to become poor. Disclosure of Invention In order to improve the passivation effect of the steel strand, the application provides production equipment and production technology of an oversized-diameter steel strand. In a first aspect, the application provides a production device for an oversized-diameter steel strand, which adopts the following technical scheme: the production equipment for the oversized-diameter steel strand comprises a passivation pool, wherein a heating plate is arranged at the bottom of the passivation pool, two upper guide wheels arranged at intervals are arranged in the passivation pool, a plurality of lower guide wheels arranged at intervals are arranged at the middle positions of the two upper guide wheels, the lower guide wheels are arranged at the lower sides of the two upper guide wheels, heating assemblies are arranged in the directions, away from each other, of the two upper guide wheels, the heating assemblies are used for heating the steel strand passing through the upper guide wheels and the lower guide wheels, and the two lower guide wheels are connected with lifting assemblies used for driving the two lower guide wheels and the heating plate to move upwards when metal surface treatment agents in the passivation pool are reduced. Through adopting above-mentioned technical scheme, in the in-process of in-service use, heat the steel strand wires before entering into metal surface treatment agent through heating element to heat the inside metal surface treatment agent of passivation pond through the hot plate, make the inside metal surface treatment agent of passivation pond can keep above 80 ℃ with the steel strand wires contact, thereby reduced because the lower phenomenon emergence that leads to the metal surface treatment agent to be difficult to be stained with on the steel strand wires of steel strand wires temperature, and heat the steel strand wires that shift out in the metal surface treatment agent through heating element, can make the surface of metal surface treatment agent at the steel strand wires more even. Optionally, the heating element includes the heating pipe, the inside heating liquid that is equipped with of heating pipe, the heating pipe upside is equipped with the fan, the fan is used for to the steel strand wires of heating pipe downside is bloied. Through adopting above-mentioned technical scheme, when need carry out the heating operation to the steel strand wires, start the fan, drive wind through the fan and blow to the steel strand wires through the heating pipe to realize the heating operation to the steel strand wires. Optionally, set up every the heating pipe all buckles and sets up, and every the both ends of heating pipe all are connected with same heat exchange box, and every the heat exchange box is inside all be equipped with respectively with two cavitys that the both ends of heating pipe are linked together, every cavity of heat exchange box is inside all be equipped with the push pedal of cavity inner wall sliding butt, and every the push pedal all is run through and threaded connection has reciprocating screw, every reciprocating screw's tip all runs through the lateral wall of heat exchange box and with the heat exchange box lateral wall rotates to be connected, every go up the centre of guid