The inner cylinder of the vertical coiler for cold-rolled steel bars and the method of operation thereon

Abstract

A vertical coiler for cold-rolled steel bars includes an inner cylinder and a method for operating thereon. The cylinder has a fixed lifting ring at its top and a central hole on its top axis. A pull rod slides through the central hole. A floating lifting ring is fixedly connected to the upper end of the pull rod. An upper limit ring is fixedly installed on the pull rod. An outer sleeve is fixedly connected to the center of the bottom of the cylinder. An inner sleeve is rotatably disposed within the outer sleeve and is fixedly connected to the pull rod. A lower limit ring is fixedly connected to the pull rod above the inner sleeve. A spiral groove is machined on the outer circumference of the pull rod within the inner sleeve. A radial protrusion that mates with the spiral groove is fixedly installed on the inner wall of the inner sleeve. Multiple drive rods are fixedly connected axially at the bottom of the inner sleeve. A connecting rod is hinged to the outer end of each drive rod, and a stop is hinged to the other end of each connecting rod. A guide sleeve is fixedly connected to each stop on the bottom surface of the cylinder, and the stop slides horizontally within the guide sleeve. This invention improves efficiency.

Description

Technical Field

[0001] This invention relates to equipment for producing cold-rolled steel bars, and particularly to a coiling device for the later stage of producing coiled cold-rolled steel bars, belonging to the field of mechanical equipment technology. Background Technology

[0002] Currently, cold-rolled steel bars are available in two forms: straight bars and coiled bars. Coiled bars are mainly coiled in two ways: one is by using a wire-spinning machine to spin the steel into coils, which are then collected into coils at a coiling station; the other is by using a coiling machine to directly collect the steel bars into coils. Based on spatial arrangement, coiling machines are further divided into horizontal coiling machines and vertical coiling machines. Vertical coiling machines are generally used in production lines with low speeds (below 500 meters / minute). The main body of a vertical coiling machine includes an outer cylinder, an inner cylinder, and a base. The base also houses the rotation drive power device. The outer cylinder is fixedly installed on the base and rotates along a vertical axis (in actual production, the outer cylinder commonly takes the form of a circular array of columns fixedly connected to the base). The inner cylinder is installed inside the outer cylinder, forming a certain distance to accommodate the coiled bars. In actual production, the inner cylinder's circumference is sometimes continuous, such as using a single, complete circumference cylinder (to reduce weight, the cylinder often has holes or slits), and sometimes discontinuous. Alternatively, several circularly distributed columns can be used, which are fixedly connected to a base to form an inner cylinder. The base can be disc-shaped or spoke-shaped. The inner cylinder is free in the vertical direction and is mounted on the base at the upper limit in the circumferential direction. Specifically, the upper limit of the inner cylinder in the circumferential direction can be achieved by using common methods such as positioning pins and positioning holes (grooves). During operation, the inner and outer cylinders rotate synchronously with the base. The steel bars enter the coiler from the top at an incline and form a circle under the action of the coiler. Then, under the action of gravity, they gradually accumulate into a coil from the bottom of the coiler.

[0003] After the vertical coiler finishes winding, the collected rebar needs to be removed from the coiler and transferred to the subsequent packaging process. There are two existing technical solutions for this operation. One is to directly remove the rebar coil from the coiler. To meet the 2-ton coil weight requirement, the rebar coil before packaging is generally about 2.3 meters high, while the inner and outer cylinders of the coiler are generally about 2.5 meters high. Therefore, to remove the rebar coil directly, a special hook-type lifting device needs to be designed to hook the bottom of the rebar coil for removal, and the factory building must meet the lifting height requirements. The second solution is to lift the rebar coil and inner cylinder together to the packaging station. In this case, the bottom of the inner cylinder is fixedly connected with evenly distributed blocks extending from the cylinder wall to support the rebar coil. After packaging, the finished rebar coil is lifted off the inner cylinder, and then the inner cylinder is lifted and installed into the outer cylinder of the coiler for another winding operation. This method, because it involves packaging with the inner cylinder attached, requires the inner cylinder to be lifted out and then repositioned only after the rebar is fully packaged. This prevents timely repositioning for the next coil winding operation, extending the coiler's waiting time. If waiting is not possible, additional inner cylinders for temporary handling are needed. Furthermore, packaging with the inner cylinder requires increasing the height of the packing machine's compaction plate by approximately 1.5 meters, increasing the equipment's weight and complexity. Summary of the Invention

[0004] The purpose of this invention is to overcome the aforementioned problems existing in the current production of cold-rolled steel bar coils using vertical coilers, and to provide an inner cylinder for a cold-rolled steel bar vertical coiler.

[0005] To achieve the objectives of this invention, the following technical solution is adopted: The inner cylinder of a vertical coiling machine for cold-rolled steel bars includes a cylindrical body. The circumferential wall of the cylinder is continuous or discontinuous. A fixed lifting ring is fixedly installed near the center of the top of the cylinder. A central hole is located on the axis near the top of the cylinder. A pull rod slides vertically through the central hole. The pull rod and the central hole are guided vertically by a key and keyway or a mating plane. A floating lifting ring is fixedly connected to the upper end of the pull rod. An upper limit ring is fixedly installed on the pull rod below the central hole. An outer sleeve is fixedly connected to the center of the bottom of the cylinder. An inner sleeve is rotatably installed within the outer sleeve and is vertically limited within the outer sleeve. The inner sleeve is fixedly connected to the pull rod. Above the inner sleeve... A lower limit ring is fixedly connected to the pull rod. A spiral groove is machined on the outer circumference of the pull rod in the inner sleeve. A radial protrusion that mates with the spiral groove is fixed on the inner wall of the inner sleeve. The radial protrusion is located in the spiral groove. Multiple drive rods are fixedly connected axially at the bottom of the inner sleeve. A connecting rod is hinged to the outer end of each drive rod. A stop is hinged to the other end of each connecting rod. A guide sleeve is fixedly connected to each stop on the bottom surface of the cylinder. The stop is horizontally slidably installed in the guide sleeve. When the lower limit ring falls on the inner sleeve, the drive rod drives the stop to extend out of the cylinder circumference. When the pull rod rises and the upper limit ring hits the center hole, the spiral groove drives the inner sleeve to rotate, which in turn drives the drive rod to rotate and drives the stop to retract into the cylinder circumference.

[0006] Furthermore, there are four drive rods and four stop blocks, which are evenly distributed along the circumference of the inner sleeve.

[0007] Furthermore, an upper spring limiting part is fixedly installed inside the cylinder, and a spring is threaded through the pull rod. The lower end of the spring abuts against the lower limiting ring, and the upper end abuts against the upper spring limiting part.

[0008] Furthermore, the upper spring limiting part is a limiting cylinder with a central hole, through which the pull rod passes, and the limiting cylinder opening is fixedly connected to the bottom surface of the cylinder with the opening facing downward.

[0009] The method of operating using the inner cylinder of a coiler, the operation including coiling and transferring to a packing machine, includes using the inner cylinder of a vertical coiler for cold-rolled steel bars as described in claim 1, and includes the following steps:

[0010] S1: Install the inner cylinder onto the winding machine using the positioning device. At this time, the pull rod drops, and the lower limit ring of the pull rod is pressed against the top end face of the inner cylinder. The four sets of stops at the bottom of the inner cylinder are in the extended position, ready for winding operation;

[0011] S2: After starting to wind up and reaching the set weight, the winding machine stops rotating. At this time, a crane is used to lift the outer lifting ring of the inner cylinder and transport the inner cylinder and the steel bar coil together to the packing machine.

[0012] S3: After being transported to the set position of the baler, the crane disengages from the fixed lifting ring and then the floating lifting ring holding the inner cylinder begins to lift it upward. At the beginning of the lifting, the inner cylinder body does not move, only the tie rod moves upward. When the tie rod rises, it drives the inner sleeve to rotate through the spiral groove and radial protrusion. The rotation of the inner sleeve drives the stop to retract inward through the drive rod and connecting rod. When the end face of the upper limit ring on the tie rod contacts the inner cylinder body, the stop has retracted to the limit position, which is smaller than the outer diameter of the inner cylinder body.

[0013] S4: The crane lifts the inner cylinder to the winding machine and releases the hook;

[0014] During the operation, repeat steps S1 to S4 to complete the process from take-up to transfer to the packing machine.

[0015] Furthermore, a positioning pin is fixedly connected to the base of the winding machine, and a positioning hole that matches the positioning pin is opened on the inner cylinder. When the inner cylinder is installed, the positioning pin is inserted into the positioning hole, and the bottom surface of the guide sleeve is supported on the winding machine or suspended in the air.

[0016] The positive and beneficial technical effects of this invention are as follows: before packaging, the inner tube can be removed from the coil and reset as soon as possible, reducing the waiting time of the winding machine, eliminating the need for an additional transition inner tube, and reducing the packaging difficulty by packaging without the inner tube being attached. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of the present invention.

[0018] Figure 2 This is a cross-sectional schematic diagram of the first embodiment.

[0019] Figure 3 yes Figure 2 Enlarged diagram at the bottom.

[0020] Figure 4 This is a schematic diagram of the second embodiment.

[0021] Figure 5 This is a schematic diagram of the lower part of the lever.

[0022] Figure 6 This is a schematic diagram of the inner sleeve. Detailed Implementation

[0023] To more fully explain the implementation of the present invention, implementation examples are provided. These implementation examples are merely illustrative of the present invention and do not limit the scope of the present invention.

[0024] The labels in the attached diagram are as follows: 1: Outer cylinder; 2: Cylindrical cylinder; 3: Base; 4: Fixed lifting ring; 5: Floating lifting ring; 6: Reinforcing bar; 7: Tie rod; 8: Upper limit ring; 9: Key; 10: Outer sleeve; 11: Inner sleeve; 12: Spiral groove; 13: Radial protrusion; 14: Lower limit ring; 15: Drive rod; 16: Connecting rod; 17: Stop; 18: Guide sleeve; 19: Nut; 20: Radial flange; 21: Limiting cylinder; 22: Spring.

[0025] Figure 2 , Figure 3 In the first embodiment, there is no spring, and the pull rod relies on gravity to reset and extend the stop. Figure 4 It has a return spring. When the pull rod moves upward, the spring is compressed, and the stop is reset under the combined action of gravity and the spring, causing the stop to extend.

[0026] As shown in the attached diagram, the inner cylinder of the cold-rolled steel bar vertical coiler is located inside the outer cylinder 1, which is fixedly connected to the base 3. The inner cylinder includes a cylindrical cylinder 2, the peripheral wall of which may be continuous or discontinuous. A fixed lifting ring 4 is fixedly installed near the center of the top of the cylinder. A central hole is located on the axis near the top of the cylinder. A pull rod 7 slides up and down through the central hole. The pull rod and the central hole are guided up and down by mutually mating keys and keyways or mutually mating planes. Specifically, the central hole can be a D-shaped hole, and the corresponding parts of the pull rod are also... In this embodiment, a key 9 is installed on the pull rod, and a keyway is located in the center hole. The key and keyway cooperate to ensure that the pull rod can only move up and down and cannot rotate. A floating ring 5 is fixedly connected to the upper end of the pull rod, and an upper limit ring 8 is fixedly installed on the pull rod below the center hole. An outer sleeve 10 is fixedly connected to the center of the bottom of the cylinder, and an inner sleeve 11 is rotatably disposed in the outer sleeve 10. The upper and lower limits of the inner sleeve are located in the outer sleeve. In this embodiment, a specific upper and lower limit method is adopted: the bottom of the inner sleeve 2 has a radial flange 20. The radial flange is larger than the inner diameter of the outer sleeve. A thread is machined on the upper peripheral wall of the inner sleeve, and a nut 19 is screwed tightly onto the thread. The nut 19 is located at the top surface of the outer sleeve.

[0027] The inner sleeve 2 is fixedly connected to the pull rod 7. A lower limit ring 14 is fixedly connected to the pull rod above the inner sleeve. A spiral groove 12 is machined on the outer circumference of the pull rod in the inner sleeve. A radial protrusion 13 that cooperates with the spiral groove is fixedly provided on the inner wall of the inner sleeve. The radial protrusion is located in the spiral groove. Multiple drive rods 15 are fixedly connected axially at the bottom of the inner sleeve. A connecting rod 16 is hinged to the outer end of each drive rod. In this embodiment, there are four drive rods and four stop irons. The four drive rods are evenly distributed along the circumference of the inner sleeve. A stop iron 17 is hinged to the other end of each connecting rod. A guide sleeve 18 is fixedly connected to each stop iron on the bottom surface of the cylinder. The stop iron 17 is horizontally slidably installed in the guide sleeve 18. When the lower limit ring 14 falls on the inner sleeve, the drive rod drives the stop iron to extend out of the circumference of the cylinder. When the pull rod rises and the upper limit ring hits the center hole (cylinder), the spiral groove drives the inner sleeve to rotate, which in turn drives the drive rod to rotate and drives the stop iron to retract into the circumference of the cylinder.

[0028] As a further optimization of the present invention, an upper spring limiting part is fixedly provided inside the cylinder, and a spring 22 is passed through the pull rod. The lower end of the spring abuts against the lower limiting ring 14, and the upper end abuts against the upper spring limiting part. The upper spring limiting part is a limiting cylinder 21 with a central hole. The pull rod passes through the central hole, and the limiting cylinder is fixedly connected to the bottom surface of the cylinder with its opening facing downward.

[0029] The method of operating using the inner cylinder of a coiler, which includes coiling and transferring to a packing machine, including the aforementioned inner cylinder of a vertical coiler for cold-rolled steel bars, includes the following steps:

[0030] S1: Install the inner cylinder onto the winding machine using the positioning device. At this time, the pull rod drops, and the lower limit ring of the pull rod is pressed against the top end face of the inner cylinder. The four sets of stops at the bottom of the inner cylinder are in the extended position, ready for winding operation;

[0031] S2: After starting to wind up and reaching the set weight, the winding machine stops rotating. At this time, a crane is used to lift the outer lifting ring of the inner cylinder and transport the inner cylinder and the steel bar coil together to the packing machine.

[0032] S3: After being transported to the set position of the baler, the crane disengages from the fixed lifting ring and then the floating lifting ring holding the inner cylinder begins to lift it upward. At the beginning of the lifting, the inner cylinder body does not move, only the tie rod moves upward. When the tie rod rises, it drives the inner sleeve to rotate through the spiral groove and radial protrusion. The rotation of the inner sleeve drives the stop to retract inward through the drive rod and connecting rod. When the end face of the upper limit ring on the tie rod contacts the inner cylinder body, the stop has retracted to the limit position, which is smaller than the outer diameter of the inner cylinder body.

[0033] S4: The crane lifts the inner cylinder to the winding machine and releases the hook;

[0034] During the operation, repeat steps S1 to S4 to complete the process from take-up to transfer to the packing machine.

[0035] In this invention, a positioning pin is fixedly connected to the base of the winding machine, and a positioning hole that cooperates with the positioning pin is opened on the inner cylinder. When the inner cylinder is installed, the positioning pin is inserted into the positioning hole, and the bottom surface of the guide sleeve is supported on the winding machine or suspended in the air.

[0036] As a further optimization of the operation method, when the inner cylinder and the steel coil are transported together to the set position of the packing machine in S2 and S3, a support bar is fixedly connected on the packing machine, and the coil (or the coil and the cylinder) falls on the support bar to reduce the pressure of the coil on the stop iron, making it easier for the stop iron to retract.

[0037] After a detailed description of the embodiments of the present invention, those skilled in the art will clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent applications. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments of the examples given in the specification.

Claims

1. An inner cylinder of a vertical coiling machine for cold-rolled steel bars, comprising a cylindrical cylinder, the circumferential wall of which may be continuous or discontinuous, and a fixed lifting ring fixedly disposed near the center of the top of the cylinder, characterized in that: A central hole is located near the top axis of the cylinder. A tie rod slides through the central hole, and the tie rod and the central hole are guided vertically by mating keys and keyways or mating planes. A floating lifting ring is fixedly connected to the upper end of the tie rod. An upper limit ring is fixedly installed on the tie rod below the central hole. An outer sleeve is fixedly connected to the center of the bottom of the cylinder. An inner sleeve is rotatably installed in the outer sleeve and is limited vertically within the outer sleeve. The inner sleeve is fixedly connected to the tie rod. A lower limit ring is fixedly connected to the tie rod above the inner sleeve. A spiral groove is machined on the outer circumference of the tie rod located in the inner sleeve. A radial protrusion that mates with a spiral groove is fixed on the wall. The radial protrusion is located in the spiral groove. Multiple drive rods are fixedly connected axially at the bottom of the inner sleeve. A connecting rod is hinged to the outer end of each drive rod, and a stop is hinged to the other end of each connecting rod. A guide sleeve is fixedly connected to each stop on the bottom surface of the cylinder. The stop is horizontally slidably installed in the guide sleeve. When the lower limit ring falls on the inner sleeve, the drive rod drives the stop to extend beyond the circumference of the cylinder. When the pull rod rises and the upper limit ring hits the center hole, the spiral groove drives the inner sleeve to rotate, which in turn drives the drive rod to rotate and drives the stop to retract back into the circumference of the cylinder.

2. The inner cylinder of the vertical coiler for cold-rolled steel bars according to claim 1, characterized in that: The aforementioned drive rods and stop blocks are all four in number, and the four drive rods are evenly distributed along the circumference of the inner sleeve.

3. The inner cylinder of the vertical coiler for cold-rolled steel bars according to claim 1, characterized in that: An upper spring limiting part is fixedly installed inside the cylinder, and a spring is threaded through the pull rod. The lower end of the spring abuts against the lower limiting ring, and the upper end abuts against the upper spring limiting part.

4. The inner cylinder of the vertical coiler for cold-rolled steel bars according to claim 3, characterized in that: The upper spring limiting part is a limiting cylinder with a central hole. The pull rod passes through the central hole, and the limiting cylinder is fixedly connected to the bottom surface of the cylinder with the opening facing downward.

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