A multi-wire parallel preprocessing system

Abstract

The present invention relates to a multi-wire parallel pre-treatment system, which includes wire rods, a pay-off stand and a descaling box. The wire rods, the pay-off stand and the descaling box correspond to each other to form a set of pre-treatment units, and there are multiple sets of the pre-treatment units. The system also includes a pickling tank, a water washing tank, a boron coating tank and a drying oven. The pickling tank includes an outer tank, an inner tank, a first chemical pump and a pump control device. The pump control device includes a shield, a control part and a switch component. The control part includes a roller shaft, a clamping plate and a rack. The switch component includes a conductive rod and two conductive elastic pieces. The present invention enables multiple drawing production lines to share a set of pre-treatment system, which can process multiple wire rods simultaneously, saving production costs. Moreover, each drawing production line can independently control pickling during the pre-treatment process, avoiding continuous corrosion of the wire rods when the machine stops.

Description

Technical Field

[0001] The present invention relates to the technical field of wire rod pretreatment, and particularly relates to a multi-wire parallel pretreatment system. Background Art

[0002] Wire rods, also known as wire stock, usually refer to small-diameter round steel in coils. Before being made into qualified products, wire rods need to undergo pretreatment, drawing, and electroplating. During the pretreatment process, wire rods need to go through operations such as descaling, pickling, water washing, and boron coating. Each production line needs to perform pretreatment, drawing, and electroplating on wire rods. Limited by the drawing process (each production line can only draw one wire rod), each drawing production line needs to be equipped with a pretreatment system. Each set of pretreatment settings needs to control temperature, chemical concentration, supply volume, etc., which not only wastes energy but also requires dedicated staff to monitor, resulting in a huge waste of production costs.

[0003] In addition, if the wire rods are still immersed in the pickling solution when the machine stops, the pickling solution will continuously corrode the wire rods, causing the wire rod diameter to become thinner, the strength to weaken or even break, and serious problems are likely to occur in subsequent production, and even affect the quality of the finished product. Summary of the Invention

[0004] To solve the problems that each drawing production line has a pretreatment system, which wastes energy, requires dedicated staff to monitor and results in high production costs, and that the pickling solution continuously corrodes the wire rods when the machine stops, the present invention provides a multi-wire parallel pretreatment system, aiming to enable multiple drawing production lines to share a set of pretreatment system. This pretreatment system can process multiple wire rods, save production costs, and each drawing production line can independently control the pretreatment process during pretreatment to avoid continuous corrosion of the wire rods when the machine stops.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A multi-wire parallel pre-treatment system includes wire rods, a pay-off stand, and a descaling box. The wire rods are wound on the pay-off stand. The wire rods, the pay-off stand, and the descaling box form a pre-treatment section. There are multiple groups of the pre-treatment sections, and the multiple groups of pre-treatment sections are parallel to each other. The wire rods of the multiple groups of pre-treatment sections pass through the corresponding descaling boxes from the pay-off stands on the right and are located on the right side of the descaling boxes. A pickling tank, a water washing tank, and a boron coating tank are sequentially arranged on the right side of the multiple groups of pre-treatment sections. A first wire passing wheel group and a second wire passing wheel group are arranged between the pickling tank and the descaling boxes of the multiple groups of pre-treatment sections. Both the first wire passing wheel group and the second wire passing wheel group are composed of multiple wire passing wheels arranged at intervals front and back. The multiple wire passing wheels of the first wire passing wheel group are in a one-to-one left-right correspondence with the multiple groups of pre-treatment sections. The multiple wire passing wheels of the second wire passing wheel group are located between the first wire passing wheel group and the pickling tank. The distance between two adjacent wire passing wheels in the second wire passing wheel group is less than the distance between two adjacent wire passing wheels in the first wire passing wheel group. The frontmost wire passing wheel in the second wire passing wheel group is located on the left behind the front side plate of the pickling tank, and the rearmost wire passing wheel in the second wire passing wheel group is located on the left in front of the rear side plate of the pickling tank. The wire rods of the multiple groups of pre-treatment sections pass through the corresponding wire passing wheels in the first wire passing wheel group and the second wire passing wheel group and then pass through the pickling tank, the water washing tank, and the boron coating tank from left to right. A third wire passing wheel group and a fourth wire passing wheel group are arranged on the right side of the boron coating tank. The third wire passing wheel group and the second wire passing wheel group have the same shape and structure and are symmetric about the left and right. The fourth wire passing wheel group and the first wire passing wheel group have the same shape and structure and are symmetric about the left and right. Drying boxes are arranged between the wire passing wheels in a one-to-one left-right correspondence in the third wire passing wheel group and the fourth wire passing wheel group. The wire rods located on the right side of the boron coating tank bypass the corresponding wire passing wheels in the third wire passing wheel group, pass through the corresponding drying boxes respectively, and then bypass the corresponding wire passing wheels in the fourth wire passing wheel group and are located on the right side of the fourth wire passing wheel group;

[0007] The pickling tank includes an outer tank, an inner tank, a first chemical pump, and a pump control device. The outer tank is a hollow cuboid with an open upper end. Multiple rectangular through holes penetrating the left side wall of the outer tank are arranged on the upper part of the left side wall of the outer tank from front to back. Multiple wire outlets opposite to the rectangular through holes left and right are arranged on the right side wall of the outer tank. The wire outlets are circular holes. Multiple purging devices opposite to the wire outlets one by one left and right are connected to the outer right wall of the outer tank. The outer tank is filled with pickling solution, and the liquid level of the pickling solution is lower than the lower end of the rectangular through holes;

[0008] An inner groove is provided inside the upper part of the outer groove. The inner groove is a hollow cuboid with an open upper end. The front and rear ends of the inner groove are respectively connected to the middle parts of the front and rear inner side walls of the outer groove. There are intervals between the left and right ends of the inner groove and the left and right inner side walls of the outer groove. A plurality of partition plates are arranged inside the inner groove from front to back. The partition plates are rectangular plate bodies. The left and right ends of the partition plates are respectively connected to the left and right inner side walls of the inner groove. The lower ends of the partition plates are connected to the inner bottom surface of the inner groove. The upper ends of the partition plates are higher than the upper end of the inner groove and lower than the upper end of the outer groove. The plurality of partition plates divide the space inside the inner groove into a plurality of pickling solution tanks that are in one-to-one left-right correspondence with the rectangular through holes. Through holes that are in left-right correspondence with the rectangular through holes are provided on the left and right side walls of each pickling solution tank. A plurality of sliding grooves are provided on the bottom surface of the bottom plate of the inner groove. The plurality of sliding grooves are vertically opposite to the plurality of pickling solution tanks. Square first discharge holes that penetrate the bottom plate of the inner groove and the sliding grooves are evenly distributed on the bottom surface of each pickling solution tank. The cross section of the sliding groove is an inverted "convex" shape with a width inside greater than the width of the lower end opening. The left and right ends and the lower end of the sliding groove are all open. A sliding plate is installed inside the sliding groove. The sliding plate is a plate body that is slidably matched with the sliding groove. A plurality of second discharge holes that are vertically corresponding to the first discharge holes are provided on the sliding plate. The right ends of the wire rods of each pretreatment part penetrate through the corresponding rectangular through holes, the through holes of the pickling solution tanks on the inner groove, the wire outlets on the outer groove, and the purging device on the outer side wall of the right side of the outer groove from left to right until they extend out of the purging device;

[0009] The pump control device includes a shield, a control part, and a switch component. The shield is a hollow cuboid with openings at both left and right ends. An installation seat is provided at the right end of the shield. The installation seat is a square annular plate body, and the inner diameter of the installation seat is the same as the diameter of the rectangular through-hole. The shield is connected to the left side wall of the outer groove outside the rectangular through-hole through the installation seat, and the inner diameter of the shield is the same as the diameter of the rectangular through-hole. A baffle is arranged inside the upper part of the shield. The baffle is a horizontal plate body, and the front and rear ends of the baffle are respectively connected to the front and rear inner side walls of the shield. The baffle divides the space inside the shield into upper and lower cavities. The lower cavity of the two cavities is the control cavity, and the upper cavity is the switch cavity. The control cavity is sleeved outside the wire rod. Concave grooves that open opposite to each other and extend into the side walls of the control cavity are provided on the front and rear inner side walls of the control cavity. The left and right ends of the groove respectively penetrate the left and right ends of the side wall of the control cavity. A control part is connected inside the control cavity. The control part includes a roller shaft, two clamping plates, and two racks. The middle part of the upper end of the outer peripheral wall of the roller shaft is in frictional contact with the lower end of the outer peripheral wall of the wire rod. Gears are connected to the front and rear parts of the roller shaft through overrunning clutches. The inner ring of the overrunning clutch is connected to the roller shaft, and the outer ring is connected to the gear. The free end of the ratchet teeth of the ratchet in the overrunning clutch inclines clockwise along the circular direction of the overrunning clutch. A rack is meshed with the upper end of each gear. The two racks are connected to the front and rear parts of the lower surface of the baffle. The clamping plate is a rectangular plate body. The two clamping plates are respectively located in the two grooves and are in sliding contact with the grooves. The right ends of the two clamping plates pass through the rectangular through-hole and are located in the left part of the outer groove. The front and rear ends of the roller shaft are rotatably connected to the left parts of the opposite side surfaces of the two clamping plates. A connecting plate is commonly connected to the right ends of the two clamping plates. The connecting plate is a rectangular plate body. A round hole through which the wire rod passes and is coaxial with the through-hole and the wire outlet is provided on the connecting plate. The front and rear parts of the left side surface of the connecting plate are connected to the two clamping plates, and the lower end of the right side surface is connected to a connecting rod. The right end of the connecting rod is connected to the left end of the sliding plate. Compression springs are commonly sleeved outside the two clamping plates between the left side inner wall of the outer groove and the connecting plate. The left and right ends of the compression spring respectively abut against the left side inner wall of the outer groove and the left side surface of the connecting plate. The diameter of the compression spring is greater than the width of the rectangular through-hole. A switch component is connected inside the switch cavity. The switch component includes a conductive rod and two conductive elastic pieces. The conductive rod is a round rod body made of metal. The right end of the conductive rod is connected to the upper end of the left side surface of the connecting plate, and the left end passes through the rectangular through-hole and extends into the right part of the switch cavity. The two conductive elastic pieces have the same shape and structure. The two conductive elastic pieces are respectively installed on the left and right parts of the inner top surface of the switch cavity. There is a distance between the two conductive elastic pieces. Wires penetrating the top plate of the shield are respectively led out from the two conductive elastic pieces;

[0010] There are multiple first chemical pumps, which are respectively arranged on the outer wall of the right side of the outer tank and correspond to multiple pickling solution tanks one by one. The water outlet of the first chemical pump penetrates through the right side wall of the outer tank and communicates with the pickling solution tank. The water inlet of the first chemical pump penetrates through the right side wall of the outer tank, extends into the pickling solution and communicates with the outer tank. The positive electrode of the first chemical pump is connected to any wire on the corresponding switch assembly, and the other wire of the switch assembly and the negative electrode of the first chemical pump are respectively connected to the commercial power supply;

[0011] The shapes and structures of the water washing tank and the boron coating tank are the same as those of the pickling tank. Water is contained in the outer tank of the water washing tank, and borax solution is contained in the outer tank of the boron coating tank.

[0012] Further, the central axis of the rectangular through hole is higher than the upper ends of the multiple wire passing wheels of the second wire passing wheel group, and the height difference between the wire outlet and the ground is the same as the height difference between the upper ends of the multiple wire passing wheels of the second wire passing wheel group and the ground.

[0013] Further, the length of the sliding plate is greater than the distance between the left and right side surfaces of the inner tank.

[0014] Further, the length of the rack is greater than the side length of the first discharge hole and less than the distance between two adjacent first discharge holes on the left and right. When the gear is located at the left end of the rack, the first discharge hole on the bottom plate of the inner tank and the second discharge hole on the sliding plate in the chute on the bottom plate of the inner tank are misaligned. When the gear is located at the right end of the rack, the first discharge hole on the bottom plate of the inner tank and the second discharge hole on the sliding plate in the chute on the bottom plate of the inner tank are vertically opposite.

[0015] Further, the distance from the left end of the rack to the left end of the shield is greater than 1 / 2 of the outer diameter of the gear.

[0016] Further, the roller shaft is a stepped cylinder with small diameters at both ends and a large diameter in the middle.

[0017] Further, the middle diameter of the roller shaft is smaller than the dedendum circle diameter of the gear. The roller shaft is a stepped cylinder made of friction material, and the upper end of the middle section of the roller shaft is higher than the round hole on the connecting plate and the upper ends of the multiple wire passing wheels of the second wire passing wheel group.

[0018] Further, when the gear is located at the left end of the rack, the left end of the conductive rod is located on the left side of the two conductive elastic pieces and the conductive rod contacts the two conductive elastic pieces. When the gear is located at the right end of the rack, the left end of the conductive rod is located on the right side of the two conductive elastic pieces and disengages from the contact with the two conductive elastic pieces.

[0019] Further, the left end face of the rack is an inclined surface that slopes to the right at the lower end. A wear-resistant lining made of nylon material is connected to the left end face of the rack. The wear-resistant lining is a plate body and is connected to the left end face of the rack.

[0020] Further, the purging device includes a purging housing, a die core sleeve, a die core, and an end cap. The purging housing is a hollow cylinder with an open left end. At the upper middle part of the outer peripheral wall of the purging housing, there is a threaded hole penetrating the inner and outer peripheral walls of the purging housing. A trachea connector is connected in the threaded hole, and the outer end of the trachea connector is connected to a trachea. At the right end of the purging housing, there is a first circular through hole penetrating the inner and outer walls on the right side of the purging housing. At the left end of the outer peripheral wall of the purging housing, there is a connecting plate. The connecting plate is an annular plate body. The inner ring surface of the connecting plate is connected to the left end of the outer peripheral wall of the purging housing. There are a plurality of first bolt holes arranged in an annular array on the connecting plate;

[0021] A die core sleeve is arranged inside the purging housing. The die core sleeve is a tube with an outer diameter matching the inner diameter of the purging housing. The inner diameter of the die core sleeve is the same as the diameter of the first circular through hole. The length of the die core sleeve is less than the distance between the left end of the purging housing and the inner wall on the right side of the purging housing. At the middle part of the outer peripheral wall of the die core sleeve, there is an annular groove. There is a gap between the left and right ends of the annular groove and the left and right ends of the die core sleeve respectively. The annular groove communicates with the trachea connector. On the left end face of the die core sleeve, there is a first circular counterbore coaxially arranged and recessed into the die core sleeve with an opening to the left. The diameter of the first circular counterbore is greater than the inner diameter of the die core sleeve and less than the outer diameter of the die core sleeve. On the right end face of the first circular counterbore, there is a second circular counterbore coaxially arranged with an opening to the left and recessed to the right towards the die core sleeve. The diameter of the second circular counterbore is greater than the inner diameter of the die core sleeve and less than the diameter of the first circular counterbore. On the inner peripheral wall of the second circular counterbore, there are a plurality of inclined ventilation holes arranged in an annular array. The ventilation holes are circular through holes. The left end of the ventilation hole communicates with the second circular counterbore inward, and the right end communicates with the annular groove outward. On the right end face of the die core sleeve, there is a third circular counterbore coaxially arranged and recessed into the die core sleeve with an opening to the right. The diameter and depth of the third circular counterbore are respectively the same as the diameter and depth of the first circular counterbore;

[0022] The die cores are installed in the circular holes on the connecting plate, the third circular counterbore, and the first circular counterbore. The die core is an annular body. The outer diameter of the die core matches the diameters of the first circular counterbore and the third circular counterbore, and the inner diameter is less than the diameter of the first circular through hole. The length of the die core matches the depths of the first circular counterbore and the third circular counterbore. The left end of the purging housing is connected with an end cap. The end cap is a circular plate body with a diameter the same as the outer diameter of the connecting plate. On the right side surface of the end cap, there is a top plate coaxially arranged. The top plate is a circular plate body with a diameter matching the inner diameter of the purging housing. On the end cap, there are a plurality of second bolt holes penetrating the left and right side surfaces of the end cap arranged in an annular array. The plurality of second bolt holes are opposite to the plurality of first bolt holes left and right. At the center of the end cap and the top plate, there is a second circular through hole sequentially penetrating the left side surface of the end cap and the right side surface of the top plate. The second circular through hole and the first circular through hole have the same diameter and are opposite left and right. The top plate is located inside the purging housing and presses against the die core sleeve and the die core;

[0023] A plurality of third bolt holes are arranged in an annular array on the right side wall of the outer groove outside the steel wire outlet. The purging housing and the end cover are connected to the outer wall on the right side of the outer groove by fastening bolts passing through the first bolt holes, the second bolt holes and the third bolt holes. The wire rod passes through the second circular through hole, the die core in the first circular counterbore, the die core sleeve, the die core in the third circular counterbore and the first circular through hole from left to right until it extends out of the purging device.

[0024] By the above technical solutions, the beneficial effects of the present invention are as follows:

[0025] The present invention can share a set of pretreatment systems among multiple wire drawing production lines. The pretreatment system can process multiple wire rods, saving production costs.

[0026] The present invention can process multiple wire rods of multiple wire drawing production lines at one time, reducing the parameter control of multiple pickling, water washing and boron coating devices, reducing the control nodes, and reducing the number of operators in this process.

[0027] One set of pretreatment system of the present invention can process multiple wire rods simultaneously, reducing multiple pickling, water washing and boron coating devices, and reducing energy consumption and raw material waste.

[0028] The present invention can achieve single-wire single control, that is, when any wire drawing production line (production line of a single wire rod) stops, the corresponding pickling part immediately discharges acid, preventing the acid pickling solution from continuously soaking the wire rod, ensuring the continuous production, and avoiding problems in subsequent production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram (top view) of the present invention;

[0030] Figure 2 is a schematic structural diagram of the pickling tank of the present invention;

[0031] Figure 3 is a top view of the pickling tank of the present invention;

[0032] Figure 4 is Figure 3 a cross-sectional view taken along line A-A of

[0033] Figure 5 is Figure 4 a cross-sectional view taken along line B-B of

[0034] Figure 6 is Figure 3 a cross-sectional view taken along line C-C of

[0035] Figure 7 is a schematic structural diagram of the purging device of the present invention;

[0036] Figure 8It is a schematic diagram of the connection between the roller shaft and the gear of the present invention.

[0037] The reference numerals in the drawings are: 1 is a wire rod, 2 is a wire pay-off stand, 3 is a descaling box, 4 is a pickling tank, 5 is a water washing tank, 6 is a boron coating tank, 7 is a drying oven, 8 is a first wire guiding wheel set, 9 is a second wire guiding wheel set, 41 is an outer tank, 42 is an inner tank, 43 is a first chemical pump, 44 is a pump control device, 51 is a large tank, 52 is a small tank, 53 is a second chemical pump, 411 is a rectangular through hole, 412 is a purging device, 413 is pickling solution, 421 is a partition plate, 422 is a through hole, 423 is a first discharge hole, 424 is a slide plate, 425 is a second discharge hole, 441 is a shield, 442 is a control part, 443 is a switch assembly, 4411 is a baffle, 4421 is a roller shaft, 4422 is a clamping plate, 4423 is a rack, 4424 is a connecting plate, 4425 is a connecting rod, 4426 is a compression spring, 4427 is a gear, 4428 is a backstop, 4431 is a conductive rod, 4432 is a conductive elastic sheet, 4121 is a purging housing, 4122 is a die core sleeve, 4123 is a die core, 4124 is an end cover, 4121a is an air pipe joint, 4121c is a first circular through hole, 4121d is a connecting plate, 4122a is an annular groove, 4122b is a first circular counterbore, 4122c is a second circular counterbore, 4122e is a vent hole, 4122d is a third circular counterbore, 4124 is an end cover, 4124a is a top plate. Detailed implementation manners

[0038] The present invention will be further described below in conjunction with the drawings and specific implementation manners:

[0039] As Figures 1 to 8As shown in the figure, a multi-wire parallel pre-treatment system includes a wire rod 1, a pay-off reel 2, and a descaling tank 3. The wire rod 1 is wound around the pay-off reel 2. The wire rod 1, the pay-off reel 2, and the descaling tank 3 form a pre-treatment section. There are multiple groups of the pre-treatment sections, and the multiple groups of pre-treatment sections are parallel to each other. The wire rods 1 of the multiple groups of pre-treatment sections pass through the corresponding descaling tanks 3 to the right from the pay-off reels 2 where they are located and are on the right side of the descaling tanks 3. A pickling tank 4, a water washing tank 5, and a boron coating tank 6 are sequentially arranged on the right side of the multiple groups of pre-treatment sections. A first wire passing wheel group 8 and a second wire passing wheel group 9 are arranged between the pickling tank 4 and the descaling tanks 3 of the multiple groups of pre-treatment sections. Both the first wire passing wheel group 8 and the second wire passing wheel group 9 are composed of multiple wire passing wheels arranged at intervals front and back. The multiple wire passing wheels of the first wire passing wheel group 8 are in a one-to-one left-right correspondence with the multiple groups of pre-treatment sections. The multiple wire passing wheels of the second wire passing wheel group 9 are located between the first wire passing wheel group 8 and the pickling tank 4. The distance between two adjacent wire passing wheels in the second wire passing wheel group 9 is less than the distance between two adjacent wire passing wheels in the first wire passing wheel group 8. The foremost wire passing wheel in the second wire passing wheel group 9 is on the left side behind the front side plate of the pickling tank 4, and the rearmost wire passing wheel in the second wire passing wheel group 9 is on the left side in front of the rear side plate of the pickling tank 4. The wire rods 1 of the multiple groups of pre-treatment sections pass through the corresponding wire passing wheels in the first wire passing wheel group 8 and the second wire passing wheel group 9 and then pass through the pickling tank 4, the water washing tank 5, and the boron coating tank 6 from left to right. A third wire passing wheel group and a fourth wire passing wheel group are arranged on the right side of the boron coating tank 6. The third wire passing wheel group and the second wire passing wheel group 9 have the same shape and structure and are symmetric about the left and right. The fourth wire passing wheel group and the first wire passing wheel group 8 have the same shape and structure and are symmetric about the right and left. Drying boxes 7 are arranged between the wire passing wheels that are in a one-to-one left-right correspondence in the third wire passing wheel group and the fourth wire passing wheel group. The wire rods 1 located on the right side of the boron coating tank 6 bypass the corresponding wire passing wheels in the third wire passing wheel group, pass through the corresponding drying boxes 7 respectively, and then bypass the corresponding wire passing wheels in the fourth wire passing wheel group and are on the right side of the fourth wire passing wheel group;

[0040] The pickling tank 4 includes an outer tank 41, an inner tank 42, a first chemical pump 43, and a pump control device 44. The outer tank 41 is a hollow cuboid with an open upper end. Multiple rectangular through holes 411 penetrating the left side wall of the outer tank 41 are arranged on the upper part of the left side wall of the outer tank 41 from front to back. Multiple wire outlets that are in a left-right correspondence with the rectangular through holes 411 are arranged on the right side wall of the outer tank 41. The wire outlets are circular holes. Multiple purging devices 412 that are in a one-to-one left-right correspondence with the wire outlets are connected to the right outer wall of the outer tank 41. Acid pickling solution 413 is contained in the outer tank 41, and the liquid level of the acid pickling solution 413 is lower than the lower end of the rectangular through holes 411;

[0041] An inner groove 42 is arranged inside the upper part of the outer groove 41. The inner groove 42 is a hollow cuboid with an open upper end. The front and rear ends of the inner groove 42 are respectively connected to the middle parts of the front and rear inner side walls of the outer groove 41. There are intervals between the left and right ends of the inner groove 42 and the left and right inner side walls of the outer groove 41. A plurality of partition plates 421 are arranged inside the inner groove 42 from front to back. The partition plates 421 are rectangular plate bodies. The left and right ends of the partition plates 421 are respectively connected to the left and right inner side walls of the inner groove 42. The lower ends of the partition plates 421 are connected to the inner bottom surface of the inner groove 42. The upper ends of the partition plates 421 are higher than the upper end of the inner groove 42 and lower than the upper end of the outer groove 41. The plurality of partition plates 421 divide the space inside the inner groove 42 into a plurality of pickling solution tanks that are arranged in a one-to-one left-right correspondence with the rectangular through holes 411. Through holes 422 that are arranged in a left-right correspondence with the rectangular through holes 411 are arranged on the left and right side walls of each pickling solution tank. A plurality of sliding grooves are arranged on the bottom surface of the bottom plate of the inner groove 42. The plurality of sliding grooves are arranged in an up-down correspondence with the plurality of pickling solution tanks. Square first discharge holes 423 that penetrate through the bottom plate of the inner groove 42 and the sliding grooves are evenly distributed on the bottom surface of each pickling solution tank. The cross section of the sliding groove is an inverted "convex" shape with an inner width greater than the width of the lower end opening. The left and right ends and the lower end of the sliding groove are all open. A sliding plate 424 is installed inside the sliding groove. The sliding plate 424 is a plate body that is slidably matched with the sliding groove. A plurality of second discharge holes 425 that are arranged in an up-down correspondence with the first discharge holes 423 are arranged on the sliding plate 424. The right end of the wire rod 1 of each pretreatment part penetrates through the corresponding rectangular through hole 411, the through hole 422 of the pickling solution tank on the inner groove 42, the wire outlet on the outer groove 41, and the purging device 412 on the outer side wall of the right side of the outer groove 41 from left to right until it extends out of the outer side of the purging device 412;

[0042] The pump control device 44 includes a shield 441, a control unit 442, and a switch assembly 443. The shield 441 is a hollow rectangular parallelepiped with openings at both left and right ends. An installation base is provided at the right end of the shield 441. The installation base is a square annular plate body, and the inner diameter of the installation base is the same as the diameter of the rectangular through-hole 411. The shield 441 is connected to the left side wall of the outer groove 41 outside the rectangular through-hole 411 through the installation base. The inner diameter of the shield 441 is the same as the diameter of the rectangular through-hole 411. A baffle 4411 is provided inside the upper part of the shield 441. The baffle 4411 is a horizontal plate body, and the front and rear ends of the baffle 4411 are respectively connected to the front and rear inner side walls of the shield 441. The baffle 4411 divides the space inside the shield 441 into two cavities, an upper cavity and a lower cavity. The lower cavity is the control cavity, and the upper cavity is the switch cavity. The control cavity is sleeved outside the wire rod 1. Concave grooves that open oppositely and recess into the side walls of the control cavity are provided on the front and rear inner side walls of the control cavity. The left and right ends of the grooves respectively penetrate the left and right ends of the side wall of the control cavity. The control unit 442 is connected inside the control cavity. The control unit 442 includes a roller shaft 4421, two clamping plates 4422, and two racks 4423. The middle part of the upper end of the outer peripheral wall of the roller shaft 4421 is in frictional contact with the lower end of the outer peripheral wall of the wire rod 1. Gears 4427 are connected to the front and rear parts of the roller shaft 4421 through overrunning clutches 4428. The inner ring of the overrunning clutch 4428 is connected to the roller shaft 4421, and the outer ring is connected to the gear 4427. The free ends of the ratchet teeth of the ratchet in the overrunning clutch are inclined clockwise along the circular direction of the overrunning clutch 4428. A rack 4423 is engaged with the upper end of each gear 4427. The two racks 4423 are connected to the front and rear parts of the lower surface of the baffle 4411. The clamping plates 4422 are rectangular plate bodies. The two clamping plates 4422 are respectively located in the two grooves and are in sliding contact with the grooves. The right ends of the two clamping plates 4422 pass through the rectangular through-hole 411 and are located inside the left part of the outer groove 41. The front and rear ends of the roller shaft 4421 are rotatably connected to the left parts of the opposite side surfaces of the two clamping plates 4422. A connecting plate 4424 is commonly connected to the right ends of the two clamping plates 4422. The connecting plate 4424 is a rectangular plate body. A round hole for the wire rod 1 to pass through, which is coaxial with the through-hole 422 and the wire outlet, is provided on the connecting plate 4424. The front and rear parts of the left side surface of the connecting plate 4424 are connected to the two clamping plates 4422, and the lower end of the right side surface is connected to a connecting rod 4425. The right end of the connecting rod 4425 is connected to the left end of the sliding plate 424. A compression spring 4426 is commonly sleeved outside the two clamping plates 4422 between the left side inner wall of the outer groove 41 and the connecting plate 4424. The left and right ends of the compression spring 4426 respectively abut against the left side inner wall of the outer groove 41 and the left side surface of the connecting plate 4424. The diameter of the compression spring 4426 is greater than the width of the rectangular through-hole 411;A switch assembly 443 is connected inside the switch cavity. The switch assembly 443 includes a conductive rod 4431 and two conductive elastic pieces 4432. The conductive rod 4431 is a round rod made of metal. The right end of the conductive rod 4431 is connected to the upper left side of the connecting plate 4424, and the left end passes through the rectangular through-hole 411 and extends into the right part of the switch cavity. The two conductive elastic pieces 4432 have the same shape and structure. The two conductive elastic pieces 4432 are respectively installed on the left and right parts of the inner top surface of the switch cavity. There is a gap between the two conductive elastic pieces 4432. Wires are respectively led out from the two conductive elastic pieces 4432 and penetrate through the top plate of the shield 441.

[0043] There are multiple first chemical pumps 43. The multiple first chemical pumps 43 are respectively arranged on the right outer wall of the outer tank 41 and correspond to multiple pickling solution tanks one by one. The water outlet of the first chemical pump 43 penetrates through the right side wall of the outer tank 41 and communicates with the pickling solution tank. The water inlet of the first chemical pump 43 penetrates through the right side wall of the outer tank 41, extends into the pickling solution and communicates with the outer tank 41. The positive electrode of the first chemical pump 43 is connected to any one of the wires on the corresponding switch assembly 443, and the other wire of the switch assembly 443 and the negative electrode of the first chemical pump 43 are respectively connected to the commercial power supply.

[0044] The water washing tank 5 and the boron coating tank 6 have the same shape and structure as that of the pickling tank 4. Water is contained inside the outer tank 41 of the water washing tank 5, and borax solution is contained inside the outer tank 41 of the boron coating tank 6.

[0045] The central axis of the rectangular through-hole 411 is higher than the upper ends of the multiple wire wheels of the second wire wheel group 9. The height difference between the wire outlet and the ground is the same as the height difference between the upper ends of the multiple wire wheels of the second wire wheel group 9 and the ground.

[0046] The length of the sliding plate 424 is greater than the distance between the left and right side surfaces of the inner tank 42.

[0047] The length of the rack 4423 is greater than the side length of the first discharge hole 423 and less than the distance between two adjacent first discharge holes 423 on the left and right. When the gear 4427 is located at the left end of the rack 4423, the first discharge hole 423 on the bottom plate of the inner tank 42 and the second discharge hole 425 on the sliding plate 424 in the sliding groove on the bottom plate of the inner tank 42 are misaligned. When the gear 4427 is located at the right end of the rack 4423, the first discharge hole 423 on the bottom plate of the inner tank 42 and the second discharge hole 425 on the sliding plate 424 in the sliding groove on the bottom plate of the inner tank 42 are vertically opposite.

[0048] The distance from the left end of the rack 4423 to the left end of the shield 441 is greater than half of the outer diameter of the gear 4427.

[0049] The roller shaft 4421 is a stepped cylinder with small diameters at both ends and a large diameter in the middle.

[0050] The middle diameter of the roller shaft 4421 is smaller than the dedendum circle diameter of the gear 4427. The roller shaft 4421 is a stepped cylinder made of friction material, and the upper end of the middle section of the roller shaft 4421 is higher than the upper ends of the round holes on the connecting plate 4424 and the upper ends of the multiple wire passing wheels of the second wire passing wheel group 9.

[0051] When the gear 4427 is located at the left end of the rack 4423, the left end of the conductive rod 4431 is located on the left side of the two conductive elastic pieces 4432, and the conductive rod 4431 contacts the two conductive elastic pieces 4432. When the gear 4427 is located at the right end of the rack 4423, the left end of the conductive rod 4431 is located on the right side of the two conductive elastic pieces 4432 and is separated from the contact with the two conductive elastic pieces 4432.

[0052] The left end face of the rack 4423 is an inclined surface that slopes to the right at the lower end. A wear-resistant lining made of nylon material is connected to the left end face of the rack 4423. The wear-resistant lining is a plate body, and the wear-resistant lining is connected to the left end face of the rack 4423.

[0053] The purging device 412 includes a purging housing 4121, a die core sleeve 4122, a die core 4123, and an end cap 4124. The purging housing 4121 is a hollow cylinder with an open left end. A threaded hole penetrating the inner and outer peripheral walls of the purging housing 4121 is provided at the upper middle part of the outer peripheral wall of the purging housing 4121. An air pipe joint 4121a is connected in the threaded hole, and an air pipe is connected to the outer end of the air pipe joint 4121a. A first circular through hole 4121c penetrating the inner and outer walls on the right side of the purging housing 4121 is provided at the right end of the purging housing 4121. A connecting plate 4121d is provided at the left end of the outer peripheral wall of the purging housing 4121. The connecting plate 4121d is an annular plate body. The inner ring surface of the connecting plate 4121d is connected to the outer peripheral wall at the left end of the purging housing 4121, and a plurality of first bolt holes are annularly arranged on the connecting plate 4121d;

[0054] A die core sleeve 4122 is arranged inside the purging housing 4121. The die core sleeve 4122 is a tube body with an outer diameter matching the inner diameter of the purging housing 4121. The inner diameter of the die core sleeve 4122 is the same as the diameter of the first circular through hole 4121c. The length of the die core sleeve 4122 is less than the distance between the left end of the purging housing 4121 and the right inner wall of the purging housing 4121. An annular groove 4122a is arranged in the middle of the outer peripheral wall of the die core sleeve 4122. There are intervals between the left and right ends of the annular groove 4122a and the left and right ends of the die core sleeve 4122 respectively. The annular groove 4122a is communicated with the air pipe joint 4121a. A first circular counterbore 4122b which is recessed into the die core sleeve 4122 and has an opening to the left is coaxially arranged on the left end face of the die core sleeve 4122. The diameter of the first circular counterbore 4122b is greater than the inner diameter of the die core sleeve 4122 and less than the outer diameter of the die core sleeve 4122. A second circular counterbore 4122c which has an opening to the left and is recessed towards the die core sleeve 4122 is coaxially arranged on the right end face of the first circular counterbore 4122b. The diameter of the second circular counterbore 4122c is greater than the inner diameter of the die core sleeve 4122 and less than the diameter of the first circular counterbore 4122b. A plurality of inclined ventilation holes 4122e are annularly arranged on the inner peripheral wall of the second circular counterbore 4122c. The ventilation holes 4122e are circular through holes. The left end of the ventilation hole 4122e is internally communicated with the second circular counterbore 4122c, and the right end is externally communicated with the annular groove 4122a. A third circular counterbore 4122d which is recessed into the die core sleeve 4122 and has an opening to the right is coaxially arranged on the right end face of the die core sleeve 4122. The diameter and depth of the third circular counterbore 4122d are the same as the diameter and depth of the first circular counterbore 4122b respectively;

[0055] A die core 4123 is installed in the round hole on the connecting plate 4424, in the third circular counterbore 4122d and in the first circular counterbore 4122b. The die core 4123 is an annular body. The outer diameter of the die core 4123 matches the diameters of the first circular counterbore 4122b and the third circular counterbore 4122d, and the inner diameter is smaller than the diameter of the first circular through hole 4121c. The length of the die core 4123 matches the depths of the first circular counterbore 4122b and the third circular counterbore 4122d. A end cover 4124 is connected to the left end of the purging housing 4121. The end cover 4124 is a circular plate with a diameter consistent with the outer ring diameter of the connecting plate 4121d. A top plate 4124a is coaxially arranged on the right side surface of the end cover 4124. The top plate 4124a is a circular plate with a diameter matching the inner diameter of the purging housing 4121. A plurality of second bolt holes penetrating the left and right side surfaces of the end cover 4124 are arranged in an annular array on the end cover 4124. The plurality of second bolt holes are opposite to the plurality of first bolt holes left and right. A second circular through hole penetrating the left side surface of the end cover 4124 and the right side surface of the top plate 4124a is arranged at the center of the end cover 4124 and the top plate 4124a. The second circular through hole and the first circular through hole 4121c have the same diameter and are opposite left and right. The top plate 4124a is located inside the purging housing 4121 and presses against the die core sleeve 4122 and the die core 4123;

[0056] A plurality of third bolt holes are arranged in an annular array on the right side wall of the outer groove 41 outside the wire outlet. The purging housing 4121 and the end cover 4124 are connected to the right outer wall of the outer groove 41 by fastening bolts passing through the first bolt holes, the second bolt holes and the third bolt holes. The wire rod 1 penetrates through the second circular through hole, the die core 4123 in the first circular counterbore 4122b, the die core sleeve 4122, the die core 4123 in the third circular counterbore 4122d and the first circular through hole 4121c from left to right until it extends out of the purging device 412;

[0057] In use, the wire rod on the right side of the fourth wire passing wheel is respectively connected to multiple wire drawing production lines. During wire drawing, the wire rod 1 is pulled and moved to the right by the traction device on the wire drawing production line. The wire rod 1 is in frictional contact with the upper end of the peripheral wall of the roller shaft 4421. When the wire rod 1 moves from left to right, the roller shaft 4421 rotates clockwise. Since the roller shaft 4421 is connected to the gear 4427 via the backstop 4428, the roller shaft 4421 drives the gear 4427 to rotate clockwise. Since the upper end of the gear 4427 meshes with the rack 4423, when the gear 4427 rotates with the roller shaft 4421, it will also cause the roller shaft 4421 and the gear 4427 to move to the left simultaneously until the teeth of the gear leave the teeth at the left end of the rack 4423. At this time, when the gear 4427 rotates with the roller shaft 4421, it is in sliding contact with the wear-resistant lining plate at the left end of the rack 4423 and remains at the left end position of the rack 4423; when the gear 4427 and the roller shaft 4421 roll to the left, they drive the clamping plate 4422, the connecting plate 4424, and the connecting rod 4425 to move to the left. The connecting rod pulls the slide plate 424 to move to the left, and the second discharge hole 425 on the slide plate is misaligned with the first discharge hole 423, closing the lower end of the pickling solution tank. At the same time, the connecting plate 4424 pushes the conductive rod 4431 to move to the left and contact the two conductive elastic pieces 4432. When the conductive rod 4431 contacts the two conductive elastic pieces 4432, the corresponding first chemical pump 43 is turned on, and the first chemical pump 43 starts to work, injecting pickling solution into the corresponding pickling solution tank to immerse the wire rod 1 inside the inner tank 42. The excess pickling solution 413 overflows outward from the upper ends of the left and right side plates of the inner tank 42, starting the pickling process.

[0058] If a certain drawing production line stops, the wire rod 1 of this production line will no longer move. Due to the action of the compression spring 4426, the connecting plate 4424 will drive the clamping plate 4422, the gear 4427 and the roller 4421 to move to the right. Since the gear 4427 meshes with the rack 4423, the gear 4427 rotates counterclockwise during the rightward movement. And the middle diameter of the roller 4421 is smaller than the root circle diameter of the gear 4427. Therefore, when moving the same distance in the same time, the angle turned by the roller 4421 is greater than the angle turned by the gear 4427, that is: the roller 4421 rotates counterclockwise relative to the gear 4427 at a faster angular velocity. Such relative rotation is not restricted by the backstop 4428. Therefore, the gear 4427 and the roller 4421 can return to the origin stably and quickly. During the process of the gear 4427 and the roller 4421 returning to the origin, the connecting plate 4424 drives the conductive rod 4431 to move to the right and disconnects the circuit of the first chemical pump 43. The first chemical pump 43 powers off and stops, and no longer injects the pickling solution 413 into the inner tank 42. At the same time, the connecting plate 4424 also pushes the slide plate 424 to move to the right through the connecting rod 4425, aligning the second discharge hole 425 with the first discharge hole 423 up and down, so that the pickling solution 413 leaks out from the first discharge hole 423 and the second discharge hole 425 into the outer tank 41. At this time, the wire rod 1 in the inner tank 42 no longer contacts the pickling solution 413, avoiding the continuous corrosion of the wire rod 1 caused by the stop of a certain drawing production line.

[0059] Each production line of the present invention corresponds to a wire rod 1, and each wire rod 1 corresponds to a pump control device and a pickling solution tank, realizing single-wire single control and automatic start and stop. Therefore, the stop of a certain drawing production line will not affect the operation of other production lines at all.

[0060] In the prior art, multiple wire rods of multiple production lines need to be equipped with multiple sets of equipment composed of multiple pickling tanks 4, multiple water washing tanks 5, and multiple boron coating tanks 6. Each pickling tank 4, water washing tank 5, and boron coating tank 6 needs to be heated and temperature-controlled. This application enables multiple drawing production lines to only need to be equipped with one pickling tank 4, one water washing tank 5, and one boron coating tank 6. Workers can only monitor the control points of a set of equipment composed of one pickling tank 4, one water washing tank 5, and one boron coating tank 6, which can reduce the number of operators and save labor costs. At the same time, due to the reduction in the number of pickling tanks 4, water washing tanks 5, and boron coating tanks 6, the consumption of raw materials can also be reduced, such as low drainage volume during cleaning and maintenance, low acid consumption, less evaporation and waste of the pickling solution, and the workshop environment is improved.

[0061] The present invention enables multiple drawing production lines to share a set of pretreatment systems, and this pretreatment system can process multiple wire rods 1 simultaneously, saving production costs.

[0062] The present invention can process multiple wire rods 1 of multiple wire drawing production lines at one time, reducing the parameter control of multiple pickling, water washing, and boron coating devices, reducing the control nodes, and thus reducing the number of operators in this process.

[0063] One set of pretreatment system of the present invention can process multiple wire rods 1, reducing multiple pickling, water washing, and boron coating devices, and reducing energy consumption and raw material waste.

[0064] The present invention can achieve single-wire single control, that is, when any wire drawing production line stops, the corresponding pickling part immediately discharges acid, preventing the acid pickling solution from continuously soaking the wire rod 1, ensuring the continuous progress of production, and avoiding problems in subsequent production.

[0065] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various deformations of the technical solutions of the present invention can be made without departing from the spirit of the present invention, that is, within the scope of disclosure.

Claims

1. A multi-wire parallel preprocessing system, comprising a wire rod (1), a pay-off stand (2) and a descaling box (3), wherein the wire rod (1) is wound on the pay-off stand (2), and is characterized in that, The wire rod (1), wire pay-off stand (2) and descaling box (3) form a pre-treatment section. There are multiple groups of the pre-treatment sections, and the multiple groups of pre-treatment sections are parallel to each other. The wire rods (1) of the multiple groups of pre-treatment sections pass through the corresponding descaling boxes (3) from the wire pay-off stands (2) on the left to the right and are located on the right side of the descaling boxes (3). On the right side of the multiple groups of pre-treatment sections, there are an acid pickling tank (4), a water washing tank (5) and a boron coating tank (6) arranged in sequence. Between the acid pickling tank (4) and the descaling boxes (3) of the multiple groups of pre-treatment sections, there are a first wire passing wheel group (8) and a second wire passing wheel group (9). Both the first wire passing wheel group (8) and the second wire passing wheel group (9) are composed of multiple wire passing wheels arranged at intervals front and back. The multiple wire passing wheels of the first wire passing wheel group (8) are in one-to-one left-right correspondence with the multiple groups of pre-treatment sections. The multiple wire passing wheels of the second wire passing wheel group (9) are located between the first wire passing wheel group (8) and the acid pickling tank (4). The distance between two adjacent wire passing wheels in the second wire passing wheel group (9) is less than the distance between two adjacent wire passing wheels in the first wire passing wheel group (8). The foremost wire passing wheel in the second wire passing wheel group (9) is located on the left side behind the front side plate of the acid pickling tank (4), and the rearmost wire passing wheel in the second wire passing wheel group (9) is located on the left side in front of the rear side plate of the acid pickling tank (4). The wire rods (1) of the multiple groups of pre-treatment sections pass through the corresponding wire passing wheels in the first wire passing wheel group (8) and the second wire passing wheel group (9) and then pass through the acid pickling tank (4), the water washing tank (5) and the boron coating tank (6) from left to right. On the right side of the boron coating tank (6), there are a third wire passing wheel group and a fourth wire passing wheel group. The third wire passing wheel group and the second wire passing wheel group (9) have the same shape and structure and are symmetric left and right. The fourth wire passing wheel group and the first wire passing wheel group (8) have the same shape and structure and are symmetric left and right. Between the wire passing wheels in one-to-one left-right correspondence in the third wire passing wheel group and the fourth wire passing wheel group, there are drying boxes (7). The wire rods (1) located on the right side of the boron coating tank (6) bypass the corresponding wire passing wheels in the third wire passing wheel group, pass through the corresponding drying boxes (7) respectively and then bypass the corresponding wire passing wheels in the fourth wire passing wheel group and are located on the right side of the fourth wire passing wheel group; The acid pickling tank (4) includes an outer tank (41), an inner tank (42), a first chemical pump (43) and a pump control device (44). The outer tank (41) is a hollow cuboid with an open upper end. On the upper part of the left side wall of the outer tank (41), there are multiple rectangular through holes (411) penetrating the left side wall of the outer tank (41) from front to back. On the right side wall of the outer tank (41), there are multiple wire outlets opposite to the rectangular through holes (411) left and right. The wire outlets are circular holes. On the right outer wall of the outer tank (41), there are multiple purging devices (412) connected to the wire outlets one by one left and right. Inside the outer tank (41), there is pickling solution (413), and the liquid level of the pickling solution (413) is lower than the lower end of the rectangular through holes (411); An inner groove (42) is arranged inside the upper part of the outer groove (41). The inner groove (42) is a hollow cuboid with an open upper end. The front and rear ends of the inner groove (42) are respectively connected to the middle parts of the front and rear inner side walls of the outer groove (41). There are intervals between the left and right ends of the inner groove (42) and the left and right inner side walls of the outer groove (41). A plurality of partition plates (421) are arranged inside the inner groove (42) from front to back. The partition plates (421) are rectangular plate bodies. The left and right ends of the partition plates (421) are respectively connected to the left and right inner side walls of the inner groove (42). The lower ends of the partition plates (421) are connected to the inner bottom surface of the inner groove (42). The upper ends of the partition plates (421) are higher than the upper end of the inner groove (42) and lower than the upper end of the outer groove (41). The plurality of partition plates (421) divide the space inside the inner groove (42) into a plurality of pickling solution tanks that are in one-to-one left-right correspondence with the rectangular through holes (411). Through holes (422) that are in left-right correspondence with the rectangular through holes (411) are arranged on the left and right side walls of each pickling solution tank. A plurality of sliding grooves are arranged on the bottom surface of the bottom plate of the inner groove (42). The plurality of sliding grooves are in up-down correspondence with the plurality of pickling solution tanks. Square first discharge holes (423) that penetrate through the bottom plate of the inner groove (42) and the sliding grooves are evenly distributed on the bottom surface of each pickling solution tank. The cross-section of the sliding groove is an inverted "convex" shape with a width inside greater than the width of the lower opening. The left and right ends and the lower end of the sliding groove are all open. A sliding plate (424) is installed inside the sliding groove. The sliding plate (424) is a plate body that is slidably matched with the sliding groove. A plurality of second discharge holes (425) that are in up-down correspondence with the first discharge holes (423) are arranged on the sliding plate (424). The right end of the wire rod (1) of each pretreatment part penetrates through the corresponding rectangular through hole (411), the through hole (422) of the pickling solution tank on the inner groove (42), the wire outlet on the outer groove (41), and the purging device (412) on the right outer wall of the outer groove (41) from left to right until it extends out of the outside of the purging device (412); The pump control device (44) includes a shield (441), a control unit (442), and a switch assembly (443). The shield (441) is a hollow rectangular parallelepiped with openings at both left and right ends. An installation seat is provided at the right end of the shield (441). The installation seat is a square annular plate, and the inner diameter of the installation seat is the same as the diameter of the rectangular through-hole (411). The shield (441) is connected to the left side wall of the outer groove (41) outside the rectangular through-hole (411) through the installation seat. The inner diameter of the shield (441) is the same as the diameter of the rectangular through-hole (411). A baffle (4411) is provided inside the upper part of the shield (441). The baffle (4411) is a horizontal plate, and the front and rear ends of the baffle (4411) are respectively connected to the front and rear inner side walls of the shield (441). The baffle (4411) divides the space inside the shield (441) into two upper and lower cavities. The lower cavity of the two cavities is the control cavity, and the upper cavity is the switch cavity. The control cavity is sleeved outside the wire rod (1). Concave grooves that open opposite to each other and recess into the side walls of the control cavity are provided on the front and rear inner side walls of the control cavity. The left and right ends of the groove respectively penetrate through the left and right ends of the side wall of the control cavity. A control unit (442) is connected inside the control cavity. The control unit (442) includes a roller shaft (4421), two clamping plates (4422), and two racks (4423). The middle part of the upper end of the outer peripheral wall of the roller shaft (4421) is in frictional contact with the lower end of the outer peripheral wall of the wire rod (1). Gears (4427) are connected to the front and rear parts of the roller shaft (4421) through overrunning clutches (4428). The inner ring of the overrunning clutch (4428) is connected to the roller shaft (4421), and the outer ring is connected to the gear (4427). The free ends of the ratchet teeth of the ratchet in the overrunning clutch are inclined clockwise along the circular direction of the overrunning clutch (4428). A rack (4423) is engaged with the upper end of each gear (4427). The two racks (4423) are connected to the front and rear parts of the lower surface of the baffle (4411). The clamping plate (4422) is a rectangular plate. The two clamping plates (4422) are respectively located in the two grooves and are in sliding contact with the grooves. The right ends of the two clamping plates (4422) pass through the rectangular through-hole (411) and are located inside the left part of the outer groove (41). The front and rear ends of the roller shaft (4421) are rotatably connected to the left parts of the opposite side surfaces of the two clamping plates (4422). A connecting plate (4424) is commonly connected to the right ends of the two clamping plates (4422). The connecting plate (4424) is a rectangular plate. A round hole for the wire rod (1) to penetrate through, which is coaxial with the through-hole (422) and the wire outlet, is provided on the connecting plate (4424). The front and rear parts of the left side surface of the connecting plate (4424) are connected to the two clamping plates (4422), and the lower end of the right side surface is connected to a connecting rod (4425). The right end of the connecting rod (4425) is connected to the left end of the sliding plate (424). A compression spring (4426) is commonly sleeved outside the two clamping plates (4422) between the left inner wall of the outer groove (41) and the connecting plate (4424).The left and right ends of the compression spring (4426) respectively abut against the left inner wall of the outer groove (41) and the left side surface of the connecting plate (4424), and the diameter of the compression spring (4426) is greater than the width of the rectangular through hole (411); a switch assembly (443) is connected in the switch cavity, and the switch assembly (443) includes a conductive rod (4431) and two conductive elastic sheets (4432). The conductive rod (4431) is a round rod made of metal. The right end of the conductive rod (4431) is connected to the upper end of the left side surface of the connecting plate (4424), and the left end passes through the rectangular through hole (411) and extends into the right part of the switch cavity. The two conductive elastic sheets (4432) have the same shape and structure. The two conductive elastic sheets (4432) are respectively installed in the left part and the right part of the inner top surface of the switch cavity. There is a gap between the two conductive elastic sheets (4432), and wires respectively led out from the two conductive elastic sheets (4432) penetrate through the top plate of the protective cover (441); There are a plurality of first chemical pumps (43). The plurality of first chemical pumps (43) are respectively arranged on the right outer wall of the outer groove (41) and are in one-to-one correspondence with the plurality of pickling solution tanks. The water outlet of the first chemical pump (43) penetrates through the right side wall of the outer groove (41) and communicates with the pickling solution tank. The water inlet of the first chemical pump (43) penetrates through the right side wall of the outer groove (41) and extends into the pickling solution and communicates with the outer groove (41). The positive electrode of the first chemical pump (43) is connected to any wire on the corresponding switch assembly (443). The other wire of the switch assembly (443) and the negative electrode of the first chemical pump (43) are respectively connected to the mains; The shapes and structures of the water washing tank (5) and the boron coating tank (6) are the same as those of the pickling tank (4). Water is contained inside the outer groove (41) of the water washing tank (5), and borax solution is contained inside the outer groove (41) of the boron coating tank (6).

2. The multi-wire parallel preprocessing system according to claim 1, wherein, The central axis of the rectangular through hole (411) is higher than the upper ends of the plurality of wire passing wheels of the second wire passing wheel group (9). The height difference between the wire outlet and the ground is the same as the height difference between the upper ends of the plurality of wire passing wheels of the second wire passing wheel group (9) and the ground.

3. A multi-wire parallel preprocessing system according to claim 1, wherein The length of the skateboard (424) is greater than the distance between the left and right side surfaces of the inner groove (42).

4. A multi-wire parallel preprocessing system according to claim 1, characterized in that, The length of the rack (4423) is greater than the side length of the first discharge hole (423) and less than the distance between two adjacent first discharge holes (423) on the left and right. When the gear (4427) is located at the left end of the rack (4423), the first discharge hole (423) on the bottom plate of the inner groove (42) and the second discharge hole (425) on the skateboard (424) in the chute on the bottom plate of the inner groove (42) are misaligned. When the gear (4427) is located at the right end of the rack (4423), the first discharge hole (423) on the bottom plate of the inner groove (42) and the second discharge hole (425) on the skateboard (424) in the chute on the bottom plate of the inner groove (42) are vertically opposite.

5. A multi-wire parallel preprocessing system according to claim 1, characterized in that, The distance from the left end of the rack (4423) to the left end of the shield (441) is greater than half of the outer diameter of the gear (4427).

6. The multi-wire parallel preprocessing system according to claim 1, wherein The roller shaft (4421) is a stepped cylinder with small diameters at both ends and a large diameter in the middle.

7. A multi-wire parallel preprocessing system according to claim 6, characterized in that, The middle diameter of the roller shaft (4421) is less than the dedendum circle diameter of the gear (4427). The roller shaft (4421) is a stepped cylinder made of friction material, and the upper end of the middle section of the roller shaft (4421) is higher than the upper ends of the round holes on the connecting plate (4424) and the multiple wire passing wheels of the second wire passing wheel group (9).

8. A multi-wire parallel preprocessing system according to claim 1, characterized in that, When the gear (4427) is located at the left end of the rack (4423), the left end of the conductive rod (4431) is located on the left side of the two conductive elastic sheets (4432), and the conductive rod (4431) contacts the two conductive elastic sheets (4432). When the gear (4427) is located at the right end of the rack (4423), the left end of the conductive rod (4431) is located on the right side of the two conductive elastic sheets (4432) and disengages from the contact with the two conductive elastic sheets (4432).

9. A multi-wire parallel preprocessing system according to claim 1, characterized in that, The left end face of the rack (4423) is an inclined surface that slopes to the right at the lower end. A wear-resistant lining made of nylon material is connected to the left end face of the rack (4423). The wear-resistant lining is a plate body and is connected to the left end face of the rack (4423).

10. A multi-wire parallel preprocessing system according to claim 1, wherein, The purging device (412) includes a purging outer shell (4121), a die core sleeve (4122), a die core (4123), and an end cover (4124). The purging outer shell (4121) is a hollow cylinder with an open left end. A threaded hole penetrating the inner and outer peripheral walls of the purging outer shell (4121) is provided at the upper middle part of the outer peripheral wall of the purging outer shell (4121). An air pipe joint (4121a) is connected in the threaded hole, and an air pipe is connected to the outer end of the air pipe joint (4121a). A first circular through hole (4121c) penetrating the right inner and outer walls of the purging outer shell (4121) is provided at the right end of the purging outer shell (4121). A connecting plate (4121d) is provided at the left end of the outer peripheral wall of the purging outer shell (4121). The connecting plate (4121d) is an annular plate body. The inner ring surface of the connecting plate (4121d) is connected to the outer peripheral wall of the left end of the purging outer shell (4121), and a plurality of first bolt holes are annularly arranged on the connecting plate (4121d); A die core sleeve (4122) is arranged inside the purging housing (4121). The die core sleeve (4122) is a pipe body with an outer diameter matching the inner diameter of the purging housing (4121). The inner diameter of the die core sleeve (4122) is the same as the diameter of the first circular through hole (4121c). The length of the die core sleeve (4122) is less than the distance between the left end of the purging housing (4121) and the right inner wall of the purging housing (4121). An annular groove (4122a) is arranged in the middle of the outer peripheral wall of the die core sleeve (4122). There are spaces between the left and right ends of the annular groove (4122a) and the left and right ends of the die core sleeve (4122) respectively. The annular groove (4122a) communicates with the air pipe joint (4121a). A first circular counterbore (4122b) that is recessed into the die core sleeve (4122) and has an opening to the left is coaxially arranged on the left end face of the die core sleeve (4122). The diameter of the first circular counterbore (4122b) is greater than the inner diameter of the die core sleeve (4122) and less than the outer diameter of the die core sleeve (4122). A second circular counterbore (4122c) that has an opening to the left and is recessed towards the die core sleeve (4122) is coaxially arranged on the right end face of the first circular counterbore (4122b). The diameter of the second circular counterbore (4122c) is greater than the inner diameter of the die core sleeve (4122) and less than the diameter of the first circular counterbore (4122b). A plurality of inclined ventilation holes (4122e) are annularly arranged on the inner peripheral wall of the second circular counterbore (4122c). The ventilation holes (4122e) are circular through holes. The left end of the ventilation hole (4122e) communicates with the second circular counterbore (4122c) inwardly, and the right end communicates with the annular groove (4122a) outwardly. A third circular counterbore (4122d) that is recessed into the die core sleeve (4122) and has an opening to the right is coaxially arranged on the right end face of the die core sleeve (4122). The diameter and depth of the third circular counterbore (4122d) are the same as the diameter and depth of the first circular counterbore (4122b) respectively; In the round holes on the connecting plate (4424), in the third circular counterbore (4122d), and in the first circular counterbore (4122b), die cores (4123) are installed. The die cores (4123) are toroidal bodies. The outer diameter of the die cores (4123) matches the diameters of the first circular counterbore (4122b) and the third circular counterbore (4122d), and the inner diameter is smaller than the diameter of the first circular through-hole (4121c). The length of the die cores (4123) matches the depths of the first circular counterbore (4122b) and the third circular counterbore (4122d). A end cover (4124) is connected to the left end of the purge housing (4121). The end cover (4124) is a circular plate body with a diameter consistent with the outer ring diameter of the connecting plate (4121d). A top plate (4124a) is coaxially arranged on the right side surface of the end cover (4124). The top plate (4124a) is a circular plate body with a diameter matching the inner diameter of the purge housing (4121). A plurality of second bolt holes penetrating the left and right side surfaces of the end cover (4124) are annularly arranged on the end cover (4124). The plurality of second bolt holes are opposite to the plurality of first bolt holes left and right. A second circular through-hole penetrating the left side surface of the end cover (4124) and the right side surface of the top plate (4124a) is arranged at the center of the end cover (4124) and the top plate (4124a). The second circular through-hole has the same diameter as the first circular through-hole (4121c) and is opposite left and right. The top plate (4124a) is located inside the purge housing (4121) and presses tightly against the die core sleeve (4122) and the die cores (4123); A plurality of third bolt holes are annularly arranged on the right side wall of the outer groove (41) outside the wire outlet. The purge housing (4121) and the end cover (4124) are connected to the right outer wall of the outer groove (41) by fastening bolts passing through the first bolt holes, the second bolt holes, and the third bolt holes. The wire rod (1) passes through the second circular through-hole, the die core (4123) in the first circular counterbore (4122b), the die core sleeve (4122), the die core (4123) in the third circular counterbore (4122d), and the first circular through-hole (4121c) from left to right until it extends outside the purge device (412).

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