A dual highline combination coiled p / f transport system and method

Abstract

The application particularly relates to a double-high-line combined coil P / F transportation system and method, which comprises a first transportation line and a second transportation line, the first transportation line and the second transportation line each comprise a circulating path, a plurality of C-shaped hooks walking along the circulating path, the circulating path is sequentially provided with a coiling station, a shearing and trimming station, a packing station, a weighing station, a label station, a packaging station and a coil unloading station along the walking direction of the C-shaped hooks, the circulating path is connected with a slow cooling path and a plurality of packing paths for the C-shaped hooks to walk, and any packing path or circulating path of the first transportation line and the second transportation line intersects, different transportation paths can be adopted according to the characteristics of steel types, the system has the functions of high-temperature rapid packing, slow cooling and low-temperature packaging, rapid switching of steel strip packing, rapid switching of steel wire packing, temporary parking of finished / coiled wire rods for repair, etc., can give consideration to double-line work of different finishing requirements, solves production stoppage, reduces production risk, and improves production efficiency and product quality.

Description

Technical Field

[0001] This invention belongs to the field of high-speed wire rod production technology, specifically relating to a dual-high-speed wire rod combined coil P / F transport system and method. Background Technology

[0002] After steel billets are rolled and cooled into wire rods, the wire rods are coiled into coils and transported to the unloading area for storage via a coil transport system. During transportation, the coils also need to undergo processes such as shearing, trimming, packaging, weighing, and labeling to become the final product for the unloading area. All processes after coiling are collectively referred to as the wire rod finishing process. Existing coil transportation methods generally employ P / F (Parker / Filler) transport lines, primarily consisting of a PF traction chain, C-hooks, and auxiliary devices such as stoppers, clamps, and clamps. Processing stations are arranged sequentially along the transport line according to the finishing process. After the coils are assembled, they are suspended on the C-hooks, and the PF traction chain drives the C-hooks to move sequentially along the transport line to each processing station. With the assistance of auxiliary devices, the C-hooks stop at their respective processing stations, and the coils are processed sequentially into finished coils. Finally, the coils are unhooked from the C-hooks in the unloading area. Compared to rail-mounted or plate-mounted transport, this method offers advantages such as allowing the coils to stop or move at any position, flexible transportation, and reduced abrasion during transport. However, its main drawback is:

[0003] On the one hand, different steel grades have different finishing requirements: for example, large-size wire rods require high temperatures during packaging, but existing systems are prone to wire rods hardening due to low temperatures during transportation, leading to obvious misalignment during packaging, greatly increasing the probability of scratches and reducing surface quality during transportation; high-alloy steel grades require lower packaging temperatures after coiling, but existing systems are prone to stress-induced martensitic transformation quality issues due to high packaging temperatures during transportation; welding wire steel, spring steel, and other steel grades need to be packaged with steel strips to avoid scratches caused by steel wire packaging, while bearing steel and other steel grades need to be packaged with steel wire, and existing systems are prone to quality and efficiency problems due to inconvenient switching during transportation; high-grade wire rods require protective packaging, but existing transportation systems are prone to burns to the protective packaging due to wire rod temperatures ≥60℃ during packaging, affecting packaging quality, and if online temporary storage is used to wait for cooling, subsequent production will be stopped; at the same time, if the speed of any process during wire rod trimming, packaging, or packing is too slow, it will also lead to the backlog of wire coils before the process, and in severe cases, it will cause the rolling line to stop waiting, affecting the overall production efficiency.

[0004] On the other hand, due to the wide variety of steel types and small order batches in special steel production lines, almost all newly installed special steel lines in China in recent years are dual-line models. This places higher demands on the layout of downstream processes. For example, in dual-line production, one line produces small-specification welding wire steel, while the other produces large-specification bearing steel. The former requires slow movement in the transport system to allow sufficient time for the wire rod to cool down before packaging, and it also requires the use of steel strapping. The latter, on the other hand, requires fast movement in the transport system to prevent serious misalignment during packaging after cooling, and it also requires the use of steel wire strapping. There is a clear contradiction between the two, and the existing transport system is prone to production stoppages because it cannot meet the above requirements.

[0005] Secondly, when the packing machine is under maintenance, the cessation of the transportation system can easily affect the production rhythm of the high-speed line and reduce production efficiency. Due to the design features of the C-hook, which is open on one side and horizontally coiled, it is easy to trim the outer side of the coil, but complicated to trim the inner side. The tail of the coil is inside the C-hook, making it inconvenient to remove the cut coil after trimming, which increases the workload and reduces production efficiency. Summary of the Invention

[0006] The present invention aims to at least partially solve one of the above-mentioned technical problems. The present invention provides a dual-line combined coil P / F transport system and method, which can accommodate dual-line operation with different finishing needs, solve production stoppages, reduce production risks, and improve production efficiency and product quality.

[0007] The technical solution adopted by this invention to solve its technical problem is:

[0008] A double-high-line combined coil P / F transport system includes a first transport line and a second transport line. The first transport line and the second transport line each include a circulation path and a number of C-shaped hooks that travel along the circulation path. The circulation path is provided with a coil loading station, a shearing and trimming station, a packing station, a weighing station, a packaging station and a coil unloading station in sequence along the traveling direction of the C-shaped hooks.

[0009] The circulating path is connected in parallel with a slow cooling path for C-hook travel and several packing paths. The slow cooling path is located between the shearing and trimming station and the packing station. Any packing path or circulating path of the first transport line and the second transport line intersects. There are several packing stations, which are located on the circulating path, on each packing path, and at the intersection of the first transport line and the second transport line, respectively.

[0010] Furthermore, a vertical core frame system is provided on one side of the winding station. The vertical core frame system includes a winding device, a first transport roller, a second transport roller, and a core frame device. The first and second transport rollers are connected in parallel between the winding device and the winding station. The core frame device can reciprocate along one and / or the second transport roller to support and adjust the coil position.

[0011] Furthermore, the circulation path includes a U-shaped section, and the shearing and trimming station is equipped with a shearing reversing device. The shearing reversing device is used to move back and forth between two parallel circulation paths of the U-shaped section and reversing the direction of the coil on the upstream C-shaped hook to the downstream C-shaped hook.

[0012] Furthermore, the shearing reversing device is a fork-type roll transfer trolley.

[0013] Furthermore, the slow cooling path is equipped with a heat preservation device and / or a fan.

[0014] Furthermore, the packaging station is equipped with a steel strapping machine or a steel wire baling machine, and the first and second transport lines include at least one steel strapping machine and one steel wire baling machine.

[0015] Furthermore, a labeling station is provided between the weighing station and the packaging station.

[0016] Furthermore, there are multiple unloading stations connected in series or in parallel.

[0017] A double-highline combined coil P / F transportation method, based on any one of the above-mentioned transportation systems, the method comprising:

[0018] The coil is wound onto the empty C-hook of the first or second transport line at the upper winding station;

[0019] After being wound up, the coil travels along the circulation path with the C-shaped hook and is cut and trimmed at the shearing and trimming station.

[0020] After being cut and trimmed, the coils travel along the circulation path with the C-shaped hook, or along the slow cooling path, and are then packaged at the packaging station of their respective transport line, or travel along the intersection to the packaging station of another transport line for packaging.

[0021] After being packaged, the coil travels along the circulation path with the C-shaped hook, is weighed at the weighing station, packaged at the packaging station or passes through the packaging station, and is unhooked and unloaded at the unloading station.

[0022] After unloading, the empty C-hook travels along the loop path and returns to the rewinding station, repeating the process.

[0023] Furthermore, the time from coil assembly to packaging is controlled to be ≤30min, the temperature drop of the coil from assembly to packaging is ≤300℃, and the packaging temperature is ≥300℃.

[0024] Furthermore, the coils in the controlled slow cooling path are cooled at a delayed cooling rate of 0.3–1.0 °C / s, or rapidly cooled at a rate of 6.0–23.0 °C / s.

[0025] Furthermore, the time from roll to packaging is controlled to be ≥60 minutes, and the temperature of the rolls passing through the slow cooling path is 50℃ or below when they are packaged at the packaging station.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] (1) After the wire rod is coiled, the present invention can adopt different transportation paths according to the characteristics of the steel grade. It can quickly pack the wire rod from coiling to packaging in the first or second transportation line with a time of ≤30 minutes and a temperature drop of ≤300℃ to prevent serious mispackaging after the temperature drops. It can also repack the wire rod through a parallel circulation path to provide a temporary parking function for the wire rod to be finished / repaired. The time from coiling to packaging is ≥60 minutes and the maximum temperature during packaging protective bags is ≤50℃ to slow down the temperature drop. This avoids production stoppage and burns to the protective packaging. It solves the problem that the existing transportation system and method cannot meet the needs of different finishing methods because the temperature drop of the coil cannot be controlled online. It makes the process speed of trimming, packaging and packaging operations on each line compatible, maintains a suitable production rhythm and avoids coil backlog and production stoppage.

[0028] (2) The present invention forms a double high-speed line combination operation by the intersection of the first transport line or the second transport line, which can be matched with the double-line mode of special steel line. The corresponding packaging station can be selected from different branch points to package steel wire or steel strip, and the steel strip packaging function can be quickly switched and the steel wire packaging function can be quickly switched. This effectively solves the production stoppage problem caused by the existing transport system being unable to meet the different needs of double-line production.

[0029] (3) When the packaging station of one of the transport lines is being repaired, the present invention can also be used to work on the packaging station of another transport line to carry out online maintenance, which effectively solves the problem of production stoppage caused by the inability of the existing transport system to meet online maintenance requirements.

[0030] (4) After the coil head near the opening of the C-hook is trimmed at the upstream of the U-shaped section, the present invention can move back and forth between the two parallel circulation paths of the U-shaped section through the shearing and reversing device, and transfer the coil on the upstream C-hook to the downstream C-hook. At the downstream of the U-shaped section, the tail of the coil near the opening of the C-hook is trimmed again. This effectively solves the problem of high labor intensity caused by the lack of shearing and reversing device in the existing transportation system. It not only improves work efficiency, but also facilitates the rapid and direct entry of large-specification coils into the packaging station, so that the packaging has a higher temperature and further improves product quality.

[0031] In summary, this invention has functions such as high-temperature rapid packaging, slow-speed cooling low-temperature packaging, rapid switching to steel strap packaging, rapid switching to steel wire packaging, and temporary storage of wire rods awaiting finishing / repair. It can meet the needs of different finishing methods, improve production efficiency, and reduce production risks. Attached Figure Description

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0033] Figure 1 This is a schematic diagram of a transportation system structure according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the first transport line structure according to an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the second transport line structure according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the vertical core frame system and C-hook docking according to one embodiment of the present invention;

[0037] Figure 5 This is a commutation diagram of a shear reversing device according to an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of the packing process from the first transport line to the second transport line according to one embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the process of entering the second transport line for packaging according to one embodiment of the present invention;

[0040] Figure 8 This is a comparison diagram of the packaged versions of Embodiment 1 and Embodiment 2 of the present invention.

[0041] The diagram shows the following markers: First transport line A, First loop path 101, First winding station 102, First shearing and trimming station 103, First packaging station 104, First weighing station 105, First labeling station 106, First packaging station 107, First unloading station 108, First packaging path 109, First bend 110, First slow cooling path 111, First branch A-1, Second branch A-2, Third branch A-3, Fourth branch A-4, Fifth branch A-5, Sixth branch A-6.

[0042] Second transport line B, second circulation path 201, second winding station 202, second shearing and trimming station 203, second packaging station 204, second weighing station 205, second labeling station 206, second packaging station 207, second unloading station 208, second packaging path 209, second bend 210, second slow cooling path 211, seventh branch B-1, eighth branch B-2, ninth branch B-3, tenth branch B-4, eleventh branch B-5, twelfth branch B-6;

[0043] C-hook 3, C-hook 301 upstream of the U-shaped section, C-hook 302 downstream of the U-shaped section, vertical core winding frame system 4, winding device 401, first transport roller conveyor 402, second transport roller conveyor 403, core winding frame device 404.

[0044] The forklift trolley 5, forks 501, and coil 6; the arrows on the first or second transport line indicate the direction of travel of the C-hook. Figure 8 (a) shows a photograph of the packaged reel from Example 1. Figure 8 (b) shows a photograph of the packaged roll from Example 2. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0046] like Figure 1 As shown, this is a preferred embodiment of the double-high-line combined coil P / F transportation system of the present invention. The transportation system includes a first transportation line A and a second transportation line B. The first transportation line A and the second transportation line B each include a circulation path and a plurality of C-shaped hooks 3 that travel along the circulation path. The circulation path is provided with a winding station, a cutting and trimming station, a packing station, a weighing station, a labeling station, a packaging station and an unloading station in sequence along the traveling direction of the C-shaped hooks 3.

[0047] The circulation path is connected in parallel with a slow cooling path for C-type hook 3 to travel and several packing paths. The slow cooling path is located between the shearing and trimming station and the packing station. Any packing path or circulation path of the first transport line A and the second transport line B intersects. There are several packing stations, which are located on the circulation path, on each packing path, and at the intersection of the first transport line A and the second transport line B, respectively.

[0048] like Figure 2As shown, in the first transport line A, the circulation path is the first circulation path 101, there are 120 C-type hooks, the winding station is the first winding station 102, the shearing and trimming station is the first shearing and trimming station 103, the packing station is the first packing station 104, the weighing station is the first weighing station 105, the labeling station is the first labeling station 106, the packaging station is the first packaging station 107, the unwinding station is the first unwinding station 108, the slow cooling path is the 250-meter first slow cooling path 111, and the packing path includes two first packing paths 109. The cold path 111 is located between the first shearing and trimming station 103 and the first packaging station 104, so that the two ends of the first slow cooling path 111 form a first branch A-1 and a second branch A-2 with the first circulation path 101, respectively. The two ends of a first packaging path 109 form a third branch A-3 and a fourth branch A-4 with the first circulation path 101, respectively. The middle part forms a fifth branch A-5 with one end of another first packaging path 109, and the other end of another first packaging path 109 forms a sixth branch A-6 with the first circulation path 101.

[0049] Figure 3 As shown, the second transport line B has a second circulation path 201, 120 C-type hooks, a second winding station 202, a second shearing and trimming station 203, a second packing station 204, a second weighing station 205, a second labeling station 206, a second packaging station 207, a second unwinding station 208, a 250-meter slow cooling path 201, and two second packing paths 209 and 21. 1 is located between the second shearing and trimming station 203 and the second packaging station 204. One of the second packaging paths 209 intersects with the first circulation path 101, and the two ends of the second packaging path 209 form the seventh branch B-1 and the eighth branch B-2 with the second circulation path 201, respectively. The two ends of the second slow cooling path 211 form the ninth branch B-3 and the tenth branch B-4 with the second circulation path 201, respectively. The two ends of the other second packaging path 209 form the eleventh branch B-5 and the twelfth branch B-6 with the second circulation path 201, respectively.

[0050] Furthermore, the main body of the C-type hook 3 adopts a Q355B high-strength steel welded box structure, and the hook head is made of cast iron. The rated load of the C-type hook 3 can reach 4000Kg. It has excellent wear resistance, high temperature resistance and heat deformation resistance, ensuring the stability of coil transportation.

[0051] Furthermore, each fork in the railway uses Q355B I-beams, and the C-type coupler 3 train sets at the turning points of the first transport line A and the second transport line B use high wear-resistant rollers. The C-type coupler 3 train sets are guided by traction chains arranged along the first transport line A and the second transport line B, which effectively ensures the service life of the fork in the railway turnouts and the C-type coupler 3 train sets.

[0052] Furthermore, a vertical winding core frame system 4 is provided on one side of the winding station, such as... Figure 4 As shown, the vertical core frame system 4 includes a winding device 401, a first transport roller conveyor 402, a second transport roller conveyor 403, and a core frame device 404. The first transport roller conveyor 402 and the second transport roller conveyor 403 are connected in parallel between the winding device 401 and the upper winding station. The core frame device 404 can reciprocate along one transport roller conveyor and / or the second transport roller conveyor 403 to support and adjust the position of the coil. The core frame device 404 carries the vertically positioned coil and transports it to the upper winding station along the first transport roller conveyor 402 or the second transport roller conveyor 403, and adjusts the coil to a horizontal position so that the coil can be hung on the C-shaped hook 3 through the opening of the C-shaped hook 3 to avoid scratches.

[0053] Due to the design features of the C-hook 3, trimming the outer side of the wire rod is convenient, while trimming the inner side is complex. Therefore, further, such as Figure 1 As shown, the circulation path includes a U-shaped section, and the shearing and trimming station is equipped with a shearing reversing device. The shearing reversing device is used to move back and forth between the two parallel circulation paths of the U-shaped section and reversing the direction of the coil on the upstream C-shaped hook 3 to the downstream C-shaped hook 3.

[0054] like Figure 5 As shown, further, the shearing reversing device is a fork-type transfer trolley 5, which stops the C-shaped hook 3 carrying the coil at the corresponding position on the upstream of the U-shaped section of the circulation path. The coil head near the opening of the C-shaped hook 3 is trimmed for the first time. After the first trimming, the forks 501 of the fork-type transfer trolley 5 move towards the opening of the C-shaped hook 3, inserting into the coil and lifting it. The fork-type transfer trolley 5 carries the coil downstream along the parallel circulation path of the U-shaped section, causing the coil to exit the C-shaped hook 3. Simultaneously, since the opening of the C-shaped hook 3 reverses after traveling downstream along the U-shaped section, the C-shaped hook 3 can insert... The coil is lifted inside the mobile forklift transfer trolley 5, and after the forklift transfer trolley 5 moves in the opposite direction to exit the coil, the tail of the coil is close to the opening of the C-hook 3. The tail of the coil, which has been trimmed once, is then trimmed a second time, thus realizing the rapid reversal of coil shearing. The unloaded forklift transfer trolley 5 can run repeatedly to perform the reversal operation again. This shearing and trimming station only requires one person to complete the shearing and trimming of both the head and tail of the coil at the same time, which greatly reduces the workload of tail trimming, improves work efficiency, and facilitates the rapid and direct entry of large-specification coils into the packaging station, allowing for higher temperatures during packaging.

[0055] Furthermore, the U-shaped segments on the first loop path 101 and the second loop path 201 can be set opposite each other, which can further optimize the operation position and reduce system layout redundancy.

[0056] Furthermore, the slow cooling path is equipped with a heat preservation device and / or a fan. The heat preservation device can be an enclosed grid, and the fan can be a small axial flow fan, so that different cooling speeds can be achieved by using them alone or in combination, thereby further meeting the finishing needs of different steel grades.

[0057] Furthermore, the packaging station is equipped with a steel strapping machine or a steel wire baling machine. The first transport line A and the second transport line B each include at least one steel strapping machine and one steel wire baling machine, so that different steel types can be packaged with steel wire or steel strapping as needed and enter the corresponding packaging station from different branch points. Both the first transport line A and the second transport line B can meet different packaging and finishing requirements.

[0058] Furthermore, at least one labeling station is provided between the weighing station and the packaging station. The weighing station weighs the items using a weighing device, and the packaging station is used to package and protect the coils behind the labels using packaging auxiliary devices and manual labor. The packaging protection includes adding an integrated packaging bag, anti-scratch protective pads, etc.

[0059] Furthermore, there are multiple unloading stations connected in series or in parallel. For example, the first transport line A has two unloading stations connected in series, and the second transport line B has two unloading stations connected in parallel through an unloading path connected in parallel with the loop path, so as to meet different unloading requirements.

[0060] Based on the same inventive concept, the method for transporting coils using the above-mentioned double-highline combined coil P / F transport system includes:

[0061] Step 1: Wind the coil onto the unloaded C-type hook 3 of either the first transport line A or the second transport line B at the upper winding station. Specifically:

[0062] like Figure 1 As shown, the dual-line high-speed production line corresponds to the vertical core frame system 4 of the first transport line A and the second transport line B respectively, so that the first transport line A and the second transport line B each undertake the finishing work of one high-speed production line.

[0063] After the coiling device 401 forms the wire rod into a coil, it falls into the coil frame device 404 of the vertical coil frame system 4. The coil frame device 404 carries the vertical coil and transports it to the upper winding station along the first transport roller 402 or the second transport roller 403. The coil frame device 404 adjusts the coil to a horizontal state and hangs the coil on the C-hook 3 through the opening of the C-hook 3. The empty coil frame device 404 returns for transport again.

[0064] In case of abnormal situations, excess coils can be temporarily stacked on a stopped conveyor roller via the core frame device 404, and transported between the coiling device 401 and the loading station by another conveyor roller, thus avoiding downtime.

[0065] Step 2: After being wound up, the coil travels along the circulation path with C-hook 3, and is cut and trimmed at the shearing and trimming station. Specifically:

[0066] like Figure 2 As shown, after being wound at the first winding station 102, the coil travels along the first circulation path 101 with the C-hook 3 to the upstream of the U-shaped section of the first shearing and trimming station 103. The head of the coil near the opening of the C-hook 3 undergoes a first trimming. After the first trimming, the forklift trolley 5 lifts the coil, and the unloaded C-hook 3 travels along the first circulation path 101 to the downstream of the U-shaped section and reverses direction. The forklift trolley 5 transfers the coil to the unloaded C-hook 3 to achieve coil reversal. A second trimming is then performed on the tail of the coil near the opening of the C-hook 3, achieving rapid shearing and trimming processing. Figure 3 As shown, the second transport line B works similarly. After being wound up at the second winding station 202, the coil travels along the second circulation path 201 with the C-shaped hook 3, and is cut and trimmed at the second cutting and trimming station 203.

[0067] Step 3: After cutting and trimming, the coil travels along the circulation path with C-hook 3, or along the slow cooling path, and is then packaged at the packaging station of its respective transport line, or travels along the intersection to the packaging station of another transport line for packaging. Specifically:

[0068] like Figure 2 As shown, the sheared and trimmed coils on the first transport line A travel along the first circulation path 101 with the C-hook 3 to the first branch point A-1. The first branch point A-1 provides two paths, and the packaging and packing requirements are determined according to the steel grade of the coils:

[0069] The first path can directly pass through the second fork A-2, reach the third fork A-3, and enter the corresponding first packaging station 104 on the first loop path 101 for steel strip packaging, or continue forward and enter the corresponding first packaging station 104 through the fifth fork A-5 for steel wire packaging, or continue forward through the fifth fork A-5 and enter the corresponding first packaging station 104 through the first bend 110 for steel strip packaging. After packaging, the coil can merge at the fourth fork A-4 or the sixth fork A-6 with the C-hook 3 and continue to travel along the first loop path 101. Due to the short path segment, the time from coil collection to packaging is ≤30 minutes, and the temperature drop of the coil from coil collection to packaging is ≤300℃. For example, when packaging large-specification wire rods, the temperature is ≥300℃, which can ensure good package shape.

[0070] The second path can enter the first slow cooling path 111 from the first branch A-1, continue for 250 meters to reach the second branch A-2, and then use an insulation device to control the coils passing through the first slow cooling path 111 to delay cooling at a rate of 0.3 to 1.0℃ / s, or use a small axial flow fan to control the coils passing through the first slow cooling path 111 to cool them quickly at a rate of 6.0 to 23.0℃ / s. Alternatively, the coils can be temporarily stopped and then packaged in the same way as the first path to give them sufficient cooling time. This ensures that the coils passing through the slow cooling path reach a temperature of 50℃ or below when packaged at the packaging station, without affecting subsequent production.

[0071] like Figure 6 As shown, when the steel strapping machine or wire baling machine of the first transport line A malfunctions, the coils on the first transport line A that have not passed through or have passed through the first slow cooling path 111 are carried by the C-hook 3 and enter the second transport line B from the third branch A-3. They are then baled by the common steel strapping machine at the intersection, or they enter the second baling station 204 on the second circulation path 201 from the eighth branch B-2 for steel strapping, or they merge with the coils that have passed through or have not passed through the second slow cooling path 211 at the eleventh branch B-5 and enter the corresponding second baling station 204 along the second bend 210 for wire baling. Finally, they continue to travel along the second circulation path 201 along the twelfth branch B-6, so that any first baling station 104 of the first transport line A can be inspected online, avoiding interruptions.

[0072] like Figure 3 As shown, the sheared and trimmed coils on the second transport line B travel along the second circulation path 201 with the C-type hook 3 to the seventh fork B-1. The seventh fork B-1 provides two paths, and the packaging and packing requirements are determined according to the steel grade of the coils:

[0073] The first route can directly pass through the seventh fork B-1 and reach the intersection with the first transport line A. The common steel strapping machine at the intersection can be used for packing. Due to the short route, the temperature of large-specification wire rods can be ≥300℃ when packing, which can ensure good bale shape.

[0074] The first scenario for the second path is as follows: After continuing to the ninth fork B-3, continue to the tenth fork B-4 at the ninth fork B-3, and enter the packing station for steel strip packing from the eleventh fork B-5, or enter the packing station for steel wire packing via the eleventh fork B-5 and the second bend 210. Due to the short path segment, the time from coiling to packing is ≤30 minutes, and the temperature drop of the coil from coiling to packing is ≤300℃. For example, when packing large-specification wire rods, the temperature is ≥300℃, which can ensure good packing shape.

[0075] The second scenario for the second path is as follows: After continuing to the ninth fork B-3, the coils entering the second slow cooling path 211 at the ninth fork B-3 continue for 250 meters to reach the tenth fork B-4. A temporary stop can be made, and the coils traveling along the second slow cooling path 211 can be cooled at a rate of 0.3–1.0℃ / s using an insulation device, or rapidly cooled at a rate of 6.0–23.0℃ / s using a small axial flow fan. Then, they are packaged in the same manner as in the first scenario for the second path, to allow sufficient cooling time so that the coils traveling along the second slow cooling path 211 reach a temperature of 50℃ or below when packaged at the packaging station, without affecting subsequent production. Finally, all coils converge at the twelfth fork B-6 and continue along the second circulation path 201.

[0076] like Figure 7 As shown, when the steel strapping machine or wire baling machine on the second transport line B malfunctions, the coils on the second transport line B that have not passed through the second slow cooling path 211 are carried by the C-type hook 3, entering the first transport line A from the seventh branch B-1, then passing through the third branch A-3 to the fifth branch A-5 for wire baling, or entering the first bend 110 for wire baling; or the coils on the second transport line B that have not passed through or have passed through the second slow cooling path 211 are carried by the C-type hook 3, passing through the seventh branch B-1 and the ninth branch. B-3, the tenth fork B-4, the eleventh fork B-5 enters the second loop path 201, passes the eighth fork B-2 to enter the common steel strapping machine at the intersection for strapping, or continues directly, passes the third fork A-3 to enter the fifth fork A-5 for steel wire strapping or enters the first bend 110 for steel wire strapping, and finally converges at the sixth intersection, and travels along the first loop path 101 so that any second strapping station 204 of the second transport line B can be inspected online to avoid interruption.

[0077] Step 4: After packaging, the coil travels along the circulation path with C-hook 3, is weighed at the weighing station, packaged at the packaging station or passes through the packaging station, labeled at the labeling station, and unhooked and unloaded at the unloading station. Specifically:

[0078] like Figure 2As shown, the C-hook 3, after passing the sixth intersection, continues along the first circulation pipeline and is weighed at the first weighing station 105. For steel grades that require additional integrated packaging bags and anti-scratch pads, they have already passed through a slow cooling path, which has provided sufficient time for cooling. The time from coiling to packaging is ≥60 minutes. When the coil is packaged at the first packaging station 107, the coil temperature has already dropped to 50℃ or below, avoiding burns from the packaging protective products. For steel grades that do not require further packaging, they can pass directly through the packaging station without packaging bags without passing through the slow cooling path. They are then labeled at the first labeling station 106 and unhooked at any of the first uncoiling stations 108. The finished coil obtained after uncoiling is then put into storage.

[0079] like Figure 3 As shown, the C-hook 3, after passing the twelfth intersection, continues along the second circulation pipeline and is weighed at the second weighing station 205. For steel grades that require additional integrated packaging bags and anti-scratch pads, they have already passed through a slow cooling path, which has provided sufficient time for cooling. The time from coiling to packaging is ≥60 minutes. When the coil is packaged at the second packaging station 207, the coil temperature has already dropped to 50℃ or below, avoiding burns from the packaging protective products. For steel grades that do not require further packaging, they can pass directly through the packaging station without packaging bags without passing through the slow cooling path. They are then labeled at the second labeling station 206 and unhooked at any of the second uncoiling stations 208. The finished coil obtained after uncoiling is then put into storage.

[0080] Step 5: After unloading, the empty C-hook 3 travels along the loop path and returns to the rewinding station, repeating the process.

[0081] like Figure 2 As shown, after unwinding at the first unwinding station 108, the empty C-hook 3 travels along the first cycle path 101 and returns to the first winding station 102 for further finishing; as... Figure 3 As shown, the empty C-hook 3 obtained after unloading at the second unloading station 208 travels along the second circulation path 201 and returns to the second loading station 202 for further finishing.

[0082] Taking the transport of SWRCH35K steel wire rod with a diameter of 26mm as an example, Example 1 uses the transportation method described in this invention and directly packages the wire rod without a slow cooling path, while Comparative Example 1 uses the conventional PF production line described in the background art for transportation. Taking the transport of 55SiCr steel wire rod with a diameter of 14mm as an example, Example 2 uses the transportation method described in this invention and directly packages the wire rod through a slow cooling path, while Comparative Example 2 uses the transportation method described in this invention and directly packages the wire rod without a slow cooling path. The results are compared in Table 1 below:

[0083] Table 1: Effects of different transportation methods

[0084]

[0085] As can be seen from Table 1 above, the above-mentioned transportation system and method can adopt different transportation paths according to the steel grade characteristics of the coil after the wire rod is coiled: it can directly pack the coil on the first or second transportation line with a fast packing function with a coiling-to-packing time of ≤30min and a temperature drop of ≤300℃, preventing serious mispacking after temperature drop; it can also repack the coil through a parallel circulating path, with a temporary parking function for wire rods to be finished / repaired, and a slow cooling function with a coiling-to-packing time of ≥60min and a maximum temperature of ≤50℃ when packaging protective bags, avoiding production stoppages and burns to the protective packaging; it can adapt the process speeds of trimming, packing, and packaging operations on each line, maintain a suitable production rhythm, and avoid coil backlog and production stoppages; it can also use the first transportation line to pack the coils. The intersection of the first and second transport lines forms a dual-high-speed combined wire rod coil transportation and warehousing structure, which can be matched with the dual-line mode of high-quality special steel lines that have been newly introduced in China in recent years. Even if the steel grades produced by the two lines have different finishing requirements and travel speeds, different needs can be met by the dual operation of the first and second transport lines. During packaging, parallel packaging paths can be used to select the corresponding packaging station for steel wire or steel strip packaging from different branch points, and the steel strip packaging function can be quickly switched to the steel wire packaging function. When the packaging station of one transport line is under maintenance, the packaging station of the other transport line can be used through the intersection, which effectively avoids production stoppages, makes great use of the flexibility of the transportation system, thereby improving production efficiency, reducing production risks, and making it suitable for widespread application.

[0086] In the description of this invention, it should be understood that the terms "middle," "lateral," "length," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0087] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0088] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A double-highline combined coil P / F transport system, characterized in that, It includes a first transport line (A) and a second transport line (B). The first transport line (A) and the second transport line (B) each include a loop path and a number of C-shaped hooks (3) that travel along the loop path. The loop path is provided with a winding station, a cutting and trimming station, a packing station, a weighing station, a packaging station and a winding unloading station in sequence along the traveling direction of the C-shaped hooks (3). The circulation path is connected in parallel with a slow cooling path for the C-type hook (3) to travel and several packing paths. The slow cooling path is located between the shearing and trimming station and the packing station. Any packing path or circulation path of the first transport line (A) and the second transport line (B) intersects. There are several packing stations, which are located on the circulation path, on each packing path, and at the intersection of the first transport line (A) and the second transport line (B). The packing station is equipped with a steel strapping machine or a steel wire baling machine. The first transport line (A) and the second transport line (B) include at least one steel strapping machine and one steel wire baling machine. After being cut and trimmed, the coils travel along the circulation path with the C-shaped hook (3), or travel along the slow cooling path, and are then packed at the packing station of their respective transport line, or travel along the intersection to the packing station of another transport line for packing.

2. The double-highline combined coil P / F transport system according to claim 1, characterized in that, A vertical core frame system (4) is provided on one side of the winding station. The vertical core frame system (4) includes a winding device (401), a first transport roller (402), a second transport roller (403), and a core frame device (404). The first transport roller (402) and the second transport roller (403) are connected in parallel between the winding device (401) and the winding station. The core frame device (404) can reciprocate along the first transport roller (402) and / or the second transport roller (403) to support and adjust the coil position.

3. The double-highline combined coil P / F transport system according to claim 1, characterized in that, The circulation path includes a U-shaped section, and the shearing and trimming station is equipped with a shearing reversing device. The shearing reversing device is used to move back and forth between the two parallel circulation paths of the U-shaped section and reversing the transfer of the coil on the upstream C-shaped hook (3) to the downstream C-shaped hook (3).

4. The double-highline combined coil P / F transport system according to claim 1, characterized in that, The slow cooling path is equipped with a heat preservation device and / or a fan.

5. The double-highline combined coil P / F transport system according to claim 1, characterized in that, A labeling station is provided between the weighing station and the packaging station, and there are multiple unloading stations connected in series or in parallel.

6. A method for transporting P / F (partially coupled) coils using a double-high-line combination, characterized in that, Based on the transportation system according to any one of claims 1 to 5, the method comprises: The coil is wound onto the empty C-type hook (3) of the first transport line (A) or the second transport line (B) at the upper winding station; After being wound up, the coil travels along the circulation path with the C-shaped hook (3) and is cut and trimmed at the cutting and trimming station; After being cut and trimmed, the coils travel along the circulation path with the C-hook (3), or along the slow cooling path, and are then packaged at the packaging station of their respective transport line, or travel along the intersection to the packaging station of another transport line for packaging. After packaging, the coil travels along the circulation path with the C-shaped hook (3), is weighed at the weighing station, packaged at the packaging station or passes through the packaging station, and unhooked and unloaded at the unloading station. After unloading, the empty C-hook (3) travels along the loop path and returns to the rewinding station to repeat the process.

7. The double-high-line combined coil P / F transportation method according to claim 6, characterized in that, Control the coils that travel along the loop path into the packaging station, with a packaging temperature ≥300℃.

8. The double-high-line combined coil P / F transportation method according to claim 6, characterized in that, The coils passing through the slow cooling path are controlled to be cooled at a delayed cooling rate of 0.3~1.0℃ / s, or cooled rapidly at a rate of 6.0~23.0℃ / s.

9. A double-high-line combined coil P / F transportation method according to claim 6, characterized in that, The temperature of the coils passing through the slow cooling path is controlled to be 50°C or below when they are packaged at the packaging station.

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