Narrow steel strip unwinding mechanism and method
By designing a narrow steel strip unwinding mechanism, the first and second steel rolls are aligned and the steel roll tail and head are fixed and welded together with a pressure plate. This solves the problems of large footprint and high cost in narrow steel strip production, achieves uninterrupted supply and optimized equipment layout, and reduces maintenance costs and floor space.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-04-03
AI Technical Summary
Existing technologies lack a simple, compact, and cost-effective uninterrupted unwinding solution for the production of narrow steel strips, resulting in a large number of equipment, a large footprint, and high requirements for plant infrastructure, which limits the optimization and cost reduction of the production of combined structure spiral welded steel pipes.
The narrow steel strip unwinding mechanism adopts an alignment design of the first and second steel coils, uses pressure plates to fix the coil tail and coil head, and welds them together to achieve the docking between steel coils, reducing the number of mechanical parts, lowering manufacturing difficulty and failure rate, and optimizing equipment layout.
It enables uninterrupted supply of narrow steel strips, reduces maintenance costs, improves system reliability, is suitable for space-constrained production environments, simplifies equipment layout and replacement processes, and reduces floor space and overall costs.
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Figure CN121776299A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mechanical engineering technology, and in particular to a narrow steel strip unwinding mechanism and method. Background Technology
[0002] In the manufacturing of spiral welded steel pipes, especially in the production of composite structure spiral welded steel pipes, the traditional method involves setting up a side production line with a pit and a long steel strip relaxation section to connect the front and rear coils. This allows for the replacement of steel strip coils during production, ensuring a continuous supply of wide steel strips. However, this technical solution requires excavating a pit to accommodate the equipment and necessitates a long space to form the steel strip relaxation buffer section, resulting in a series of problems such as a large number of equipment, a large overall footprint, high requirements for plant infrastructure, and high system costs. Summary of the Invention
[0003] Therefore, it is necessary to provide a simple and easy-to-operate narrow steel strip unwinding mechanism and method to address the above problems.
[0004] In a first aspect, this application provides a narrow steel strip unwinding mechanism, including a first steel drum for carrying a steel coil and a second steel drum for carrying another steel coil. The central axis of the first steel drum is aligned with the central axis of the second steel drum. The first steel drum includes a first protruding end that can extend out of the steel coil. A first pressure plate is provided on the first protruding end. The first pressure plate is used to connect and fix the tail of the steel coil on the first steel drum and the head of the steel coil on the second steel drum.
[0005] In one embodiment, the second steel coil includes a second protruding end that can extend out of the steel coil, and a second pressure plate is provided on the second protruding end. The second pressure plate is used to connect and fix the tail of the steel coil on the second steel coil and the head of the steel coil to be processed on the first steel coil.
[0006] In one embodiment, both the first pressure plate and the second pressure plate include a first upper pressure plate, a second upper pressure plate, and a lower pressure plate;
[0007] The tail of the steel coil on the first steel coil is located between the first upper pressure plate and the lower pressure plate, and the head of the steel coil on the second steel coil is located between the second upper pressure plate and the lower pressure plate.
[0008] In one embodiment, a welding element is provided on the side of the lower pressure plate near the tail of the steel coil on the first steel coil drum. The welding element is used to weld the tail of the steel coil on the first steel coil drum and the head of the steel coil on the second steel coil drum.
[0009] In one embodiment, the weldment is a metal gasket.
[0010] In one embodiment, a weld joint is provided between the tail of the steel coil on the first steel coil and the head of the steel coil on the second steel coil to assist in welding the tail of the steel coil on the first steel coil and the head of the steel coil on the second steel coil.
[0011] In one embodiment, the weld joint has a V-shaped cross-section.
[0012] In one embodiment, at least one of the first and second steel coils is movable to facilitate loading and positioning of the steel coil.
[0013] Secondly, this application provides a method for unwinding narrow steel strip, comprising the following steps:
[0014] The first steel coil is placed on the first steel coil drum, and the tail of the first steel coil is pulled out and fixed in the first pressure plate on the first extended end of the first steel coil drum.
[0015] Place the second steel coil on the second steel coil drum, pull the tail of the second steel coil out to the second pressure plate on the second extended end of the second steel coil drum, and pull out the head of the second steel coil drum and fix it to the first pressure plate so that the tail of the first steel coil and the head of the second steel coil are connected and fixed.
[0016] Weld the tail of the first steel coil to the head of the second steel coil.
[0017] Loosen the first pressure plate and unwind the first steel coil;
[0018] After the first steel coil is unwound, the third steel coil is placed on the first steel coil drum, and the head of the third steel coil is pulled out to the second pressure plate, where it is joined and welded to the tail of the second steel coil.
[0019] In one embodiment, the method further includes:
[0020] After welding and fixing the head of the third steel coil and the tail of the second steel coil, unwind the second steel coil.
[0021] After the second steel coil is unwound, place the steel coil to be processed onto the second steel coil drum and pull the tail of the steel coil to be processed to the second pressure plate.
[0022] Pull the head of the steel coil to be processed out to the first pressure plate, and connect it with the tail of the third steel coil and weld it in place;
[0023] Repeat the steps of the above embodiments and this embodiment to achieve unwinding of steel coils of arbitrary length.
[0024] The aforementioned narrow steel strip unwinding mechanism enables welding and joining between steel strip coils via a first steel drum, a second steel drum, and a first pressure plate. This significantly reduces the number of mechanical parts, lowers manufacturing difficulty and failure rate, provides convenient daily maintenance and lower maintenance costs, and improves the overall system reliability. The side-by-side alignment of the first and second steel drums results in a very small footprint for the narrow steel strip unwinding mechanism, making it particularly suitable for space-constrained production environments and optimizing equipment layout. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of a narrow steel strip unwinding mechanism according to an embodiment of the present invention;
[0026] Figure 2 This is a schematic diagram of the structure of the first pressure plate according to an embodiment of the present invention;
[0027] Figure 3 This is a schematic flowchart of a steel strip unwinding method according to an embodiment of the present invention;
[0028] Figure 4 This is a schematic flowchart of a steel strip unwinding method according to another embodiment of the present invention.
[0029] Figure label:
[0030] 10. First steel coil; 110. First steel coil; 111. First coil tail; 120. First protruding end; 121. First pressure plate; 122. First upper pressure plate; 123. Second upper pressure plate; 124. Lower pressure plate; 125. Welded component; 126. Weld joint; 20. Second steel coil; 210. Second steel coil; 211. Second coil head; 212. Second coil tail; 220. Second protruding end; 221. Second pressure plate. Detailed Implementation
[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.
[0033] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0034] 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 part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0037] In the manufacturing of spiral welded steel pipes, especially in the production of composite spiral welded steel pipes, it is necessary to weld continuous narrow steel strips (usually no more than 15 cm wide) onto wide steel strips. To ensure the continuous forming of the final steel pipe product, the supply of its base material—wide steel strips—usually needs to be uninterrupted. This can be achieved by setting up a side production line that includes a pit and a long steel strip slack section, enabling online connection between the front and rear coils, and allowing the replacement of steel strip coils during production, thus ensuring the continuity of wide steel strip supply.
[0038] However, the aforementioned non-stop connection technology for wide steel strips is completely unsuitable for the feeding process of narrow steel strips, with particularly prominent drawbacks. Firstly, this technology requires excavating a pit to accommodate the equipment and necessitates a long space to form a relaxation buffer section for the steel strip, resulting in a series of problems such as a large number of equipment, a large overall footprint, high requirements for plant infrastructure, and high system costs. Currently, there is a lack of a simple, compact, and cost-effective non-stop unwinding solution specifically designed for the characteristics of narrow steel strips, which hinders further optimization and cost reduction in the production process of composite spiral welded steel pipes.
[0039] In one exemplary embodiment, such as Figure 1 and Figure 2 As shown, this application provides a narrow steel strip unwinding mechanism, including a first steel coil 10 for carrying a steel coil and a second steel coil 20 for carrying another steel coil. The central axis of the first steel coil 10 is aligned with the central axis of the second steel coil 20. The first steel coil 10 includes a first protruding end 120 that can extend out of the steel coil. A first pressure plate 121 is provided on the first protruding end 120. The first pressure plate 121 is used to connect and fix the tail of the steel coil on the first steel coil 10 and the head of the steel coil on the second steel coil 20.
[0040] Taking a first steel coil 10 carrying a first steel coil 110 and a second steel coil 20 carrying a second steel coil 210 as an example, the central axis of the second steel coil 20 is aligned with the central axis of the first steel coil 10, ensuring that the first steel coil 110 and the second steel coil 210 are on the same unwinding path plane, thus guaranteeing a smooth and stable switching of subsequent coil materials. At the same time, the side-by-side alignment of the first steel coil 10 and the second steel coil 20 is relatively compact and can be easily integrated into existing production lines without large-scale factory renovations or occupying production space. This is particularly suitable for space-constrained production environments, achieving optimized equipment layout.
[0041] The first steel coil 110 includes a first coil tail 111, and the second steel coil 210 includes a second coil head 211. The first coil tail 111 and the second coil head 211 are in contact with each other. The first steel coil drum 10 includes a first protruding end 120, and a first pressure plate 121 is provided on the first protruding end 120. The first pressure plate 121 is used to fix the first coil tail 111 and the second coil head 211, so that the first steel coil 110 and the second steel coil 210 are fixedly connected by welding the first coil tail 111 and the second coil head 211.
[0042] Specifically, a first tail 111 of the first steel coil 110 (such as the coil currently being unwound) can be drawn from its innermost ring, and a second head 211 of the second steel coil 210 (such as the coil to be joined) can be drawn from its outermost ring. During continuous unwinding, the first tail 111 and the second head 211 are pulled to the first pressure plate 121, so that their ends contact and align with each other. Through the fastening action of the first pressure plate 121, the first tail 111 and the second head 211 can be fixed together to form a stable welding surface. Subsequently, a welding operation is performed at this interface to weld the ends of the two coils together, thereby achieving a fixed connection between the first steel coil 110 and the second steel coil 210. By using the first pressure plate 121 to firmly fix the first coil tail 111 and the second coil head 211 before welding, the flatness and alignment accuracy of the joint can be ensured, which is conducive to forming a high-quality weld. This effectively prevents the risk of breakage due to weak joints during high-speed unwinding, and ensures the quality of steel coil products and production safety.
[0043] The aforementioned narrow steel strip unwinding mechanism, through the first steel drum 10, the second steel drum 20, and the first pressure plate 121, can achieve welding and joining between steel strip coils, significantly reducing the number of mechanical parts, lowering manufacturing difficulty and failure rate, providing convenient daily maintenance and lower maintenance costs, and improving the operational reliability of the entire system; the side-by-side alignment of the first steel drum 10 and the second steel drum 20 makes the narrow steel strip unwinding mechanism occupy a very small area, making it particularly suitable for space-constrained production environments, thus optimizing the equipment layout.
[0044] In an exemplary embodiment, after the first steel coil 110 and the second steel coil 210 are fixedly connected, the first steel coil 110 can be unwound and a third steel coil can be carried, the third steel coil including a third coil head. The second steel coil 210 includes a second coil tail 212; the second steel coil 20 includes a second protruding end 220, on which a second pressure plate 221 is provided. The second pressure plate 221 is used to connect and fix the coil tail on the second steel coil 20 and the coil head of the reloaded steel coil to be processed on the first steel coil 10. At this time, the steel coil on the first steel coil 10 is the third steel coil, that is, the second pressure plate 221 is used to fix the second coil tail 212 and the third coil head to achieve a fixed connection between the second steel coil 210 and the third steel coil.
[0045] For example, after the first steel coil 110 on the first steel coil drum 10 and the second steel coil 210 on the second steel coil drum 20 are fixedly connected by the first pressure plate 121, the first steel coil 110 begins to unwind. Once the first steel coil 110 has finished unwinding, i.e., the first steel coil drum 10 is idle, and the second steel coil 210 begins to unwind, the first steel coil drum 10 can immediately carry the third steel coil, transforming it from a "working station" to a "preparatory station." This design achieves efficient reuse of workstations and avoids equipment idleness.
[0046] To achieve uninterrupted unwinding of the steel strip to an unlimited length, a second pressure plate 221 is provided at the second extended end 220 of the second steel coil 20. Before the second steel coil 210 is unwound, the second coil tail 212 has been pulled out and fixed on this second pressure plate 221. When the third steel coil is placed on the first steel coil 10, the third coil head is guided to the second pressure plate 221 of the second steel coil 20. At this time, on the second pressure plate 221, the second coil tail 212 and the third coil head are precisely aligned and pressed tightly, and the connection is completed by welding.
[0047] In the above embodiments, the first steel coil 10 and the second steel coil 20 can cycle and alternate between the "working station" and the "preparatory station", ensuring the continuity of narrow steel strip supply and enabling the efficient continuous access of the fourth, fifth and even more steel coils.
[0048] In one exemplary embodiment, such as Figure 1 As shown, the first pressure plate 121 and the second pressure plate 221 have the same structure. The standardized design is conducive to the manufacturing, replacement and maintenance of parts, and reduces the complexity and cost of the mechanism.
[0049] In one exemplary embodiment, such as Figure 2As shown, the first pressure plate 121 includes a first upper pressure plate 122, a second upper pressure plate 123, and a lower pressure plate 124. The first roll tail 111 is disposed between the first upper pressure plate 122 and the lower pressure plate 124, and the second roll head 211 is disposed between the second upper pressure plate 123 and the lower pressure plate 124.
[0050] Specifically, taking the first pressure plate 121 as an example, the first upper pressure plate 122, the second upper pressure plate 123, and the lower pressure plate 124 work together to form two clamping units, which respectively clamp the first coil tail 111 and the second coil head 211. During the connection operation, the first coil tail 111, which is drawn from the first steel coil 110, is placed between the first upper pressure plate 122 and the lower pressure plate 124; at the same time, the second coil head 211, which is drawn from the second steel coil 210, is placed between the second upper pressure plate 123 and the same lower pressure plate 124. By pressing the first upper pressure plate 122 and the second upper pressure plate 123 respectively, the first coil tail 111 and the second coil head 211 can be firmly fixed on the same reference plane (lower pressure plate 124).
[0051] In one exemplary embodiment, such as Figure 2 As shown, a welding component 125 is provided on the side of the lower pressure plate 124 near the first roll tail 111. The welding component 125 is used to weld the first roll tail 111 and the second roll head 211.
[0052] In one exemplary embodiment, the weldment 125 is a metal gasket.
[0053] In one exemplary embodiment, as Figure 2 As shown, a welding joint 126 is provided between the first roll tail 111 and the second roll head 211 to assist in welding the first roll tail 111 and the second roll head 211.
[0054] In one exemplary embodiment, such as Figure 2 As shown, the cross-section of weld joint 126 is V-shaped.
[0055] To optimize the welding process and ensure weld quality, please refer to the following: Figure 2 A weldment 125 is provided on the side of the lower pressure plate 124 near the first coil tail 111. The weldment 125 can be a copper gasket or other auxiliary welding material to ensure the welding strength of the first coil tail 111 and the second coil head 211. On the other hand, in order to achieve a strong metallurgical bond, a weld joint 126 is provided at the butt joint edge of the fixed first coil tail 111 and the second coil head 211. This weld joint 126 provides a dedicated filling space for the welding operation. Optionally, the cross-section of the weld joint 126 is V-shaped. The bevel design increases the weld penetration and bonding area, effectively preventing the risk of weld cracking under the tensile force of subsequent uncoiling.
[0056] In one exemplary embodiment, at least one of the first steel coil 10 and the second steel coil 20 is movable to facilitate the loading and positioning of the steel coil. During production line operation, frequent replacement of new steel coils is required. The movable design of the steel coils simplifies the coil replacement process, reduces downtime for coil changes, and lowers operational difficulty and risk.
[0057] In one exemplary embodiment, such as Figure 3 As shown, this application also provides a method for unwinding narrow steel strip, including the following steps:
[0058] Step 302: Place the first steel coil 110 onto the first steel coil drum 10, and pull out the first coil tail 111 of the first steel coil 110 and fix it in the first pressure plate 121.
[0059] For example, the initial setup of the first steel coil 110 is first performed by placing the first steel coil 110 onto the first steel coil drum 10. Then, the first coil tail 111 is located and pulled out from the innermost circle of the steel coil. The first coil tail 111 is pulled to the first pressure plate 121 of the first steel coil drum 10 and placed between the first upper pressure plate 122 and the lower pressure plate 124 and pressed tightly.
[0060] Step 304: Place the second steel coil 210 onto the second steel coil drum 20, pull out the second coil tail 212 of the second steel coil 210 to the second pressure plate 221, and pull out the second coil head 211 to the first pressure plate 121, and connect and weld it to the first coil tail 111.
[0061] For example, the second steel coil 210 is placed on the second steel coil drum 20. This step includes two parallel sub-operations: First, the second coil tail 212 is pulled out from the innermost coil of the second steel coil 210 and pulled and fixed to the second pressure plate 221 of the second steel coil drum 20. This operation facilitates the subsequent connection with the third steel coil; Second, the second coil head 211 is pulled out from the outermost layer of the second steel coil 210 and pulled to the first pressure plate 121 for precise docking and welding with the previously fixed first coil tail 111.
[0062] Step 306: After welding and fixing the first coil tail 111 and the second coil head 211, loosen the first pressure plate 121 and unwind the first steel coil 110.
[0063] For example, after welding is completed and the connection is confirmed to be secure, the first pressure plate 121 is released. At this time, the production line begins to unwind the first steel coil 110 normally. Since the head of the second steel coil 210 has been welded to the tail of the first steel coil 110, when the first steel coil 110 is unwound, its tension is actually transferred to the second steel coil 210 through the weld, thus physically preparing for a seamless switchover. The unwinding process of the first steel coil 110 continues until it is fully completed.
[0064] Step 308: After the first steel coil 110 is unwound, the third steel coil is placed on the first steel coil drum 10, and the head of the third coil is pulled out to the second pressure plate 221, where it is joined and welded to the tail of the second coil 212.
[0065] For example, after the first steel coil 110 is unwound, the second steel coil 210 is automatically pulled to unwind. At this time, the station where the first steel coil 10 is located is vacant. The third steel coil is then placed on the vacant first steel coil 10. Then, the third coil head is pulled out from the outermost layer of the third steel coil and pulled to the second pressure plate 221, where it is joined and welded to the second coil tail 212 prepared in step 304.
[0066] In the above embodiments, the method constructs a complete production cycle. Subsequently, when the second steel coil 210 is unwound, a connection to the fourth steel coil can be prepared on its second pressure plate 221, and this operation is repeated. By utilizing the alternating operation of the first steel coil 10 and the second steel coil 20, uninterrupted material supply is achieved, and the entire process does not require complex equipment or a large space, greatly improving practicality and unwinding efficiency.
[0067] In one exemplary embodiment, such as Figure 4 As shown, the narrow steel strip unwinding method also includes the following steps:
[0068] Step 402: After welding and fixing the third head and second tail of the third steel coil 212, unwind the second steel coil 210.
[0069] Step 404: After the second steel coil 210 is unwound, place the steel coil to be processed onto the second steel coil drum 20 and pull the tail of the steel coil to be processed to the second pressure plate 221.
[0070] Step 406: Pull the head of the steel coil to be processed out to the first pressure plate 121, and connect it with the tail of the third steel coil and weld it in place.
[0071] Step 408: Repeat the steps of the above embodiments and this embodiment to achieve unwinding of steel coils of arbitrary length.
[0072] For example, when the first steel coil 110 is unwound, the head of the second steel coil 210 is pulled out and placed on the first pressure plate 121 to align with and weld to the tail of the first steel coil 110. Then the pressure plate is released. After the first steel coil 110 is unwound, the second steel coil 210 is automatically pulled to unwind. Then the third steel coil is placed in the original position of the first steel coil 110, and the head of the third steel coil is pulled out and placed on the second pressure plate 221 to align with the tail of the second steel coil 210. The pressure plate is then pressed and welded. Then the pressure plate is released. The fourth, fifth, and subsequent steel coils are carried out in the same manner.
[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0074] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.
Claims
1. A narrow steel strip unwinding mechanism, characterized in that, The device includes a first steel coil for carrying a steel coil and a second steel coil for carrying another steel coil. The central axis of the first steel coil is aligned with the central axis of the second steel coil. The first steel coil includes a first protruding end that can extend out of the steel coil. A first pressure plate is provided on the first protruding end. The first pressure plate is used to connect and fix the tail of the steel coil on the first steel coil and the head of the steel coil on the second steel coil.
2. The narrow steel strip unwinding mechanism according to claim 1, characterized in that, The second steel coil includes a second protruding end that can extend out of the steel coil. A second pressure plate is provided on the second protruding end. The second pressure plate is used to connect and fix the tail of the steel coil on the second steel coil and the head of the steel coil to be processed on the first steel coil that is being reloaded.
3. The narrow steel strip unwinding mechanism according to claim 2, characterized in that, Both the first pressure plate and the second pressure plate include a first upper pressure plate, a second upper pressure plate, and a lower pressure plate; The tail of the steel coil on the first steel coil is located between the first upper pressure plate and the lower pressure plate, and the head of the steel coil on the second steel coil is located between the second upper pressure plate and the lower pressure plate.
4. The steel strip unwinding mechanism according to claim 3, characterized in that, The lower pressure plate is provided with a welding component on the side near the tail of the steel coil on the first steel coil drum. The welding component is used to weld the tail of the steel coil on the first steel coil drum and the head of the steel coil on the second steel coil drum.
5. The steel strip unwinding mechanism according to claim 4, characterized in that, The welded component is a metal gasket.
6. The narrow steel strip unwinding mechanism according to claim 1, characterized in that, A weld joint is provided between the tail of the steel coil on the first steel coil and the head of the steel coil on the second steel coil to assist in welding the tail of the steel coil on the first steel coil and the head of the steel coil on the second steel coil.
7. The narrow steel strip unwinding mechanism according to claim 6, characterized in that, The weld joint has a V-shaped cross-section.
8. The narrow steel strip unwinding mechanism according to any one of claims 1-7, characterized in that, At least one of the first steel coil and the second steel coil is movable to facilitate the loading and positioning of the steel coil.
9. A method for unwinding narrow steel strip, characterized in that, Including the following steps: The first steel coil is placed on the first steel coil drum, and the tail of the first steel coil is pulled out and fixed in the first pressure plate on the first extended end of the first steel coil drum. Place the second steel coil onto the second steel coil drum, pull the tail of the second steel coil out to the second pressure plate on the second extended end of the second steel coil drum, and pull out the head of the second steel coil drum and fix it to the first pressure plate so that the tail of the first steel coil and the head of the second steel coil are connected and fixed. Weld the tail of the first steel coil to the head of the second steel coil. Loosen the first pressure plate and unwind the first steel coil; After the first steel coil is unwound, the third steel coil is placed on the first steel coil drum, and the head of the third steel coil is pulled out to the second pressure plate, where it is joined and welded to the tail of the second steel coil.
10. The method for unwinding steel strip according to claim 9, characterized in that, The method further includes: After welding and fixing the head of the third steel coil and the tail of the second steel coil, the second steel coil is unwound; After the second steel coil is unwound, the steel coil to be processed is placed on the second steel coil drum, and the tail of the steel coil to be processed is pulled out to the second pressure plate. Pull the head of the steel coil to be processed out to the first pressure plate, and connect it with the tail of the third steel coil and weld it in place; Repeat the steps of claims 9 and 10 to achieve unwinding of steel coils of any length.