Jaw type hot rolling drum

Abstract

The invention discloses a jaw type hot rolling winding drum, and belongs to the technical field of winding drums. The winding drum comprises a pyramid shaft and fan-shaped plates, the fan-shaped plates comprise at least two fan-shaped plates, the fan-shaped plates jointly surround the outer side of the pyramid shaft to form a circumference, a jaw mechanism is arranged on one fan-shaped plate, and the jaw mechanism clamps and loosens strip steel through a jaw pull rod; a sliding surface is arranged on the outer side of the pyramid shaft, and the fan-shaped plate is in sliding connection with the sliding surface of the pyramid shaft through a first wedge structure; an axial through hole is formed in the pyramidal shaft, the jaw pull rod is slidably connected in the axial through hole of the pyramidal shaft through a second wedge structure, and hole shrinkage of the sector plate and loosening of the jaw are driven by a first hydraulic unit; the expansion of the fan-shaped plate and the clamping of the jaw are driven by the second hydraulic unit, the action synchronization of the fan-shaped plate and the jaw is realized through an independent oil path, and the power conflict is avoided.

Description

Technical Field

[0001] This invention belongs to the field of coil technology, and more specifically, relates to a clamp-type hot-rolled coil. Background Technology

[0002] The coiler winds up extra-long metal strips into coils and is an important piece of equipment in the strip production line. The drum, as the core component of the coiler, has expansion and contraction functions. It winds up the strip in the expanded state and unwinds it in the contracted state.

[0003] Hot-rolled coiler drums with jaws allow the jaws to grip the strip head during the coiling process, facilitating strip coiling. Currently, commonly used jaw drums employ two types of jaw devices. One type uses a multi-hydraulic cylinder structure. Specifically, multiple self-made small hydraulic cylinders, when filled with oil, push the moving jaws upwards to clamp the strip head. After the oil flow stops, the spring's restoring force allows the moving jaws to move downwards and release the strip head. This type of jaw device increases the number of oil leakage points on the jaw's sector plate, increasing maintenance time. Because the small hydraulic cylinders are axially distributed, the oil volume and time supplied to each cylinder after oil entry at one port are inconsistent, resulting in inconsistent clamping force at different points on the moving jaws, increasing the difficulty of coiling the strip. The other type uses a mechanical jaw structure, where the power source is consistent with the expansion and contraction of the drum's sector plate. The main disadvantage of this structure is that using the same power source requires the jaws and sector plate to expand and contract in unison. However, in practical work, when the steel plate is thick, the drum's expansion diameter is limited due to its stroke, preventing it from expanding to its maximum. Summary of the Invention

[0004] 1. The problem to be solved To address the problem that existing oil supply methods cannot simultaneously accommodate the movements of the fan-shaped plate and the jaws, this invention provides a jaw-type hot-rolled coil.

[0005] 2. Technical Solution To solve the above problems, the technical solution adopted by the present invention is as follows: The first objective of this invention is to provide a clamp-type hot-rolled coil, comprising a pyramidal shaft and a sector plate. The sector plate includes at least two sector plates, which together surround the outside of the pyramid axis to form a circumference. One of the sector plates has a jaw, which clamps and releases the strip steel through a jaw pull rod. The outer side of the pyramidal shaft is provided with a sliding surface, and the sector plate is slidably connected on the sliding surface of the pyramidal shaft through a first wedge structure; The pyramidal shaft has an axial through hole inside, and the jaw tie rod is slidably connected in the axial through hole of the pyramidal shaft through a second wedge structure; The reduction in diameter of the sector plate and the opening of the jaws are driven by the first hydraulic unit. The expansion of the sector plate and the clamping of the jaws are driven by a second hydraulic unit.

[0006] According to any embodiment of the present invention, the jaw-type hot-rolled coil is provided with jaw bars and fixed jaws, the jaw bars and fixed jaws extending along the axial direction of the coil, and in a cross section along the radial direction of the coil, the jaw bars are provided with inclined surfaces a, and the fixed jaws are provided with inclined surfaces b, located above inclined surfaces a, and an opening for clamping the strip is formed between inclined surfaces a and inclined surfaces b. Preferably, the inclined surfaces a and inclined surfaces b have the same angle.

[0007] According to any embodiment of the present invention, a spring bolt is connected below the jaw bar, and a spring is sleeved on the outside of the spring bolt. The spring bolt and the spring are disposed in a slot opened below the jaw bar. The upper end of the spring is connected to a spring pressure block, which is connected to the fixed jaw, and the lower end of the spring is connected to a spring bolt.

[0008] According to any embodiment of the present invention, in the clamp-type hot-rolled coil, the sector plate is slidably connected on the sliding surface of the pyramid shaft by a first wedge structure. The first wedge structure includes a wear-resistant plate, which is fixedly installed on the sliding surface of the pyramid shaft. The wear-resistant plate contacts the sector plate to reduce friction between the sector plate and the pyramid shaft.

[0009] Preferably, the wear-resistant plate is a self-lubricating wear-resistant plate made of carbon fiber. More preferably, the wear-resistant plate is a T-shaped wear-resistant plate, with the upper end of the T-shaped structure matching the fan-shaped plate.

[0010] According to any embodiment of the present invention, in the jaw-type hot-rolled coil, the second wedge structure includes a first plunger that slides on the inclined surface of the jaw pull rod. A second plunger is disposed above the first plunger, the lower surface of the second plunger is in contact with the upper surface of the first plunger, and the upper surface of the second plunger is in contact with the lower surface of the jaw bar. As the first plunger slides on the inclined surface of the jaw pull rod, the second plunger moves up and down with the first plunger, driving the jaw bar to move, thereby realizing the clamping and loosening of the strip. According to any embodiment of the present invention, the clamp-type hot-rolled coil has limiting members at both ends of the sector plate for limiting the axial displacement of the clamp strip.

[0011] According to any embodiment of the present invention, the jaw-type hot-rolled coil has an air hole inside the jaw tie rod, which connects the pyramidal shaft and the sector plate. During operation, gas is passed through the air hole to achieve internal cooling of the coil and extend the service life of the coil.

[0012] According to any embodiment of the present invention, in the jaw-type hot-rolled coil, one end of the pyramidal shaft is connected to the fixed end, and the other end is connected to the power end.

[0013] According to any embodiment of the present invention, the power end of the clamp-type hot-rolled coil includes a first hydraulic unit and a second hydraulic unit. The reduction of the diameter of the sector plate and the opening of the clamp are driven by the first hydraulic unit; the expansion of the diameter of the sector plate and the clamping of the clamp are driven by the second hydraulic unit.

[0014] According to any embodiment of the present invention, the first hydraulic unit includes a first hydraulic cylinder A and a second hydraulic cylinder A. The first hydraulic cylinder A is provided with a first piston A connected to the jaw pull rod, and the first liquid inlet A is connected to the rod chamber of the first hydraulic cylinder A. The second hydraulic cylinder A is provided with a second piston A connected to the pyramidal shaft, and the second inlet A is connected to the rodless chamber of the second hydraulic cylinder A; The first liquid inlet A, the second liquid inlet A, and the P1 oil inlet are connected.

[0015] According to any embodiment of the present invention, the second hydraulic unit of the clamp-type hot-rolled coil includes a first hydraulic cylinder B and a second hydraulic cylinder B; The first hydraulic cylinder B is provided with a first piston B connected to the jaw lever, and the first inlet B is connected to the rodless chamber of the first hydraulic cylinder B; The second hydraulic cylinder B is provided with a second piston B connected to the pyramidal shaft, and the second inlet B is connected to the rod chamber of the second hydraulic cylinder B; The first liquid inlet B, the second liquid inlet B, and the P2 oil inlet are connected.

[0016] 3. Beneficial effects Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention has two sets of oil circuits at the power end, which are used for the expansion of the drum and the clamping of the jaws, as well as the reduction of the drum and the loosening of the jaws. The hydraulic cylinder that controls the reduction of the diameter of the sector plate and the hydraulic cylinder that controls the loosening of the jaws are the same oil circuit. The hydraulic cylinder that controls the expansion of the diameter of the sector plate and the hydraulic cylinder that controls the clamping of the jaws are the same oil circuit. By using the same oil circuit to supply oil at the same time, the synchronicity of the movement of the sector plate and the jaws is improved. (2) The present invention achieves the raising or lowering of the jaw bar by the cooperation between the pyramidal shaft, the jaw tie rod and the sector plate, and by introducing the cooperation of the first plunger and the second plunger, thereby avoiding large-scale holes in the drum, effectively improving the structural strength of the drum and thus improving the stability of the drum operation. (3) The present invention has an air hole inside the jaw pull rod, which connects the pyramidal shaft and the sector plate. When working, the air hole is filled with gas, which can cool the inside of the drum and extend the service life of the drum. (4) The present invention provides a self-lubricating wear-resistant plate between the fan-shaped plate and the pyramidal shaft. This material can separate carbon particles at the end of the fiber bundle of the body to achieve long-term self-lubrication. It has a low coefficient of friction and strong mechanical properties. Without the need to add a lubrication structure, it reduces the wear rate at this point, so that the drum can maintain a high precision state for a long time. Attached Figure Description

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless specifically indicated, these drawings are intended only to conceptually illustrate the structural construction described herein and are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the jaw-type hot-rolled coil of this application when the jaws are clamped during the coil expansion diameter; Figure 2 This is a schematic diagram of the jaw-type hot-rolled coil of this application when the jaws are loosened during the coil diameter reduction; Figure 3 for Figure 1 Sectional view of side A; Figure 4 for Figure 3 Enlarged view of the structure at the middle jaw; Figure 5 for Figure 2 Sectional view of side B; Figure 6 for Figure 2 Sectional view of plane C; Figure 7 for Figure 2 Sectional view of surface D; Figure 8 for Figure 2 Mid-X plane sectional view; Figure 9 This is a schematic diagram of the power end structure of the jaw-type hot-rolled coil of this application; In the diagram: 1. Pyramid axis; 2. Sector plate; 3. Wear-resistant steel plate; 4. Jaws; 41. Jaw bar; 411. Inclined surface a; 42. Fixed jaws; 421. Inclined surface b; 43. Spring bolt; 44. Spring pressure block; 45. Spring; 5. Jaw lever; 51. Air hole; 61. First plunger; Second plunger; 7. Hollow shaft; 71. Retaining ring; 8. Fixed end; 9. Power end; 91. P1 oil inlet; 911. First hydraulic cylinder A; 9111. First piston A; 9112. First fluid inlet A; 912. Second hydraulic cylinder A; 9121. Second piston A; 9122. Second fluid inlet A; 92. P2 oil inlet; 921. First hydraulic cylinder B; 9211. First piston B; 9212. First fluid inlet B; 922. Second hydraulic cylinder B; 9221. First piston B; 9222. First fluid inlet B; 93. Rotary joint. Detailed Implementation

[0019] The following detailed description of exemplary embodiments of the invention is taken with reference to the accompanying drawings, which form part of the description and illustrate exemplary embodiments in which the invention may be practiced. While these exemplary embodiments have been described in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be implemented and various changes may be made to the invention without departing from the spirit and scope thereof. The more detailed description of embodiments of the invention below is not intended to limit the scope of the claimed invention, but is merely illustrative and not restrictive of the description of the features and characteristics of the invention, to suggest the best mode for carrying out the invention, and is sufficient to enable those skilled in the art to practice the invention. Therefore, the scope of the invention is defined only by the appended claims.

[0020] Example 1 A type of clamp-type hot-rolled coil, such as Figure 1-2 As shown, it includes a pyramidal shaft 1 and a sector plate 2, wherein the sector plate 2 is slidably connected to the outside of the pyramidal shaft 1 through a first wedge structure.

[0021] One end of the pyramidal shaft 1 is connected to the fixed end 8, and the other end is connected to the power end 9. A hollow shaft 7 is provided on the outside of the pyramidal shaft 1 between the sector plate 2 and the power end 92. The hollow shaft 7 is concentrically sleeved on the outside of the pyramidal shaft 1, and a retaining ring 71 is provided between the sector plate 2 and the hollow shaft 7.

[0022] The outer side of the pyramidal shaft 1 is provided with a sliding surface that cooperates with the first wedge structure. The sector plate 2 slides on the sliding surface to achieve expansion and contraction. Figure 1 and Figure 6 As shown, the first wedge structure includes a wear-resistant plate 3, which is disposed between the pyramidal shaft 1 and the sector plate 2 and is fixed to the sliding surface of the pyramidal shaft 1 by bolts to reduce the friction between the pyramidal shaft 1 and the sector plate 2.

[0023] Preferably, the wear-resistant plate 3 is a self-lubricating wear-resistant plate. The wear-resistant plate 3 is made of a suitable carbon fiber plate. This material can separate carbon particles at the ends of the fiber bundles to achieve long-term self-lubrication, has a low coefficient of friction, and strong mechanical properties. It reduces the wear rate at this point without requiring additional lubrication structures, allowing the drum to maintain a high-precision state for a long time. Simultaneously, to achieve efficient heat transfer, the carbon fiber plate at the sliding surface needs not only a suitable coefficient of friction but also to consider the compressive stress on the carbon fiber plate during metal strip winding. Therefore, the carbon fiber plate also has certain tensile and flexural strength. This application uses a Saint-Gobain WearComp carbon fiber plate, which has a coefficient of friction of 0.15-0.2, a tensile strength of 186 MPa at 260℃, a flexural strength of 310 MPa, and an elastic modulus of 32400 MPa. The wear-resistant plate 3 also adopts a T-shaped structure, with the upper end of the T-shaped structure matching the fan-shaped plate 2.

[0024] When the pyramidal shaft 1 is pulled, the wear-resistant plate 3 on the sliding surface of the pyramidal shaft 1 pushes the sector plate 2 to expand outward, thereby increasing the diameter of the drum; when the pyramidal shaft 1 is retracted, the wear-resistant plate 3 of the T-shaped structure pulls the sector plate 2 to move inward, thereby reducing the diameter of the drum.

[0025] The roll in this embodiment includes four sector plates 2, which are arranged together around the outside of the pyramidal shaft 1 to form a circumference. By sliding on the outside of the pyramidal shaft 1, an expandable and contractible structure is achieved.

[0026] One of the fan-shaped plates 2 has jaws 4 for clamping the strip steel.

[0027] Specifically, such as Figure 4-5 As shown, the jaw 4 is provided with jaw bar 41 and fixed jaw 42. The jaw bar 41 and fixed jaw 42 extend along the axial direction of the drum. In the cross section along the radial direction of the drum, the jaw bar 41 is provided with an inclined surface a 411, and the fixed jaw 42 is provided with an inclined surface b 421, located above the inclined surface a 411. The inclined surfaces a 411 and b 421 have the same angle, and an opening for clamping the strip is formed between the inclined surfaces a 411 and b 421. When the drum diameter is reduced, the inclined surfaces a 411 and b 421 are close together to clamp the strip. When the drum diameter is expanded, the inclined surfaces a 411 and b 421 separate and the strip is released.

[0028] The fixed jaw 42 is fixed to the jaw 4 of the sector plate 2 by bolts.

[0029] The opening between the jaw bar 41 and the fixed jaw 42 is adjusted by the jaw lever 5. The pyramidal shaft 1 of this application has an axial through hole inside, and the jaw lever 5 is slidably connected in the axial through hole of the pyramidal shaft 1 through a second wedge structure to realize the clamping and loosening of the strip steel.

[0030] like Figure 1 and Figure 7 As shown, the second wedge structure includes a first plunger 61, which slides on the inclined surface of the jaw lever 5. A second plunger 62 is provided above the first plunger 61. The lower surface of the second plunger 62 is in contact with the upper surface of the first plunger 61, and the upper surface of the second plunger 62 is in contact with the lower surface of the jaw bar 41. As the second plunger 62 moves up and down on the inclined surface of the jaw lever 5, the first plunger 61 moves up and down with the second plunger 62, which drives the jaw bar 41 to move up and down, thereby achieving the clamping and loosening of the strip steel.

[0031] The aforementioned sliding cooperation between the jaw lever 5 and the pyramidal shaft 1, and between the pyramidal shaft 1 and the sector plate 2, enables the synchronous movement of the sector plate 2 and the jaws 4. The jaw bar 41 rises or falls through the cooperation of the first plunger 61 and the second plunger 62. This cooperation avoids problems such as excessively long single plungers and the risk of breakage of irregularly shaped parts, which would hinder maintenance and improve the stability of the drum operation.

[0032] It should be noted that the drum of this application is used in heavy-duty fields. The steel coil is heavy, so the strength requirements of the drum and its components are high. Through the cooperation between the pyramidal shaft 1, the jaw tie rod 5 and the sector plate 2, large-scale holes are avoided in the drum, which would reduce the strength of the drum. In addition, the addition of the first plunger 61 avoids the need to open a large area hole in the sector plate 2 to reduce interference, which further improves the structural strength of the drum.

[0033] Preferably, the jaw lever 5 is provided with an air hole 51 inside, which connects the pyramidal shaft 1 and the sector plate 2. When working, the air hole 51 is filled with gas, which can cool the inside of the drum and extend the service life of the drum.

[0034] Among them, the power end 9 is as follows Figure 9 As shown, it includes a first hydraulic unit and a second hydraulic unit.

[0035] The first hydraulic unit includes a first hydraulic cylinder A 911 and a second hydraulic cylinder A 912. The reduction in diameter of the sector plate 2 is driven by the first hydraulic cylinder A 911, and the opening of the jaws 4 is driven by the second hydraulic cylinder A 912. The oil circuits of the first hydraulic cylinder A 911 and the second hydraulic cylinder A 912 are interconnected, and they are simultaneously supplied with oil through the P1 oil inlet 91 to achieve synchronous movement of the sector plate 2 and the jaws 4.

[0036] The second hydraulic unit includes a first hydraulic cylinder B 921 and a second hydraulic cylinder B 922. The expansion of the sector plate 2 is driven by the first hydraulic cylinder B 921, and the clamping of the jaws 4 is driven by the second hydraulic cylinder B 922. The oil circuits of the first hydraulic cylinder B 921 and the second hydraulic cylinder B 922 are interconnected, and they are simultaneously supplied with oil through the P2 oil inlet 92 to achieve synchronous movement of the sector plate 2 and the jaws 4.

[0037] The first hydraulic cylinder A 911, the second hydraulic cylinder A 912, the first hydraulic cylinder B 921, and the second hydraulic cylinder B 922 are all located at the power end 9 of the drum. The P1 oil inlet 91 is connected to the first hydraulic cylinder A 911 and the second hydraulic cylinder A 912 through a rotary joint 93, and the P2 oil inlet 92 is connected to the first hydraulic cylinder B 921 and the second hydraulic cylinder B 922 through a rotary joint 93.

[0038] Specifically, the first hydraulic cylinder A 911 is provided with a first piston A 9111 connected to the jaw lever 5, and a first inlet A 9112 is connected to the rod chamber of the first hydraulic cylinder A 911; the second hydraulic cylinder A 912 is provided with a second piston A 9121 connected to the pyramidal shaft 1, and a second inlet A 9122 is connected to the rodless chamber of the second hydraulic cylinder A 912; the first inlet A 9112, the second inlet A 9122 and the P1 oil inlet 91 are connected.

[0039] When oil is supplied to the first hydraulic cylinder A 911 and the second hydraulic cylinder A 912 through the P1 oil inlet 91, the first piston A 9111 is pushed to move towards the fixed end 8 of the drum, and the second piston A 9121 moves towards the power end 9 of the drum; that is, the pyramidal shaft 1 moves towards the fixed end 8 of the drum, the jaw lever 5 retracts, and the sector plate 2 retracts inward under the drive of the wear-resistant plate 3, realizing the reduction of the diameter of the sector plate 2; the first plunger 61 slides down along the inclined surface of the jaw lever 5, and the second plunger 61 retracts inward with the first plunger 61, driving the jaw bar 41 to retract inward, realizing the opening of the jaw 4.

[0040] Specifically, the first hydraulic cylinder B 921 is provided with a first piston B 9211 connected to the jaw lever 5, and a first inlet B 9212 is connected to the rodless chamber of the first hydraulic cylinder B 921; the second hydraulic cylinder B 922 is provided with a second piston B 9221 connected to the pyramidal shaft 1, and a second inlet B 9222 is connected to the rod chamber of the second hydraulic cylinder B 922; the first inlet B 9212, the second inlet B 9222, and the P2 oil inlet 92 are connected together.

[0041] When oil is supplied to the first hydraulic cylinder B 921 and the second hydraulic cylinder B 922 through the P2 oil inlet 92, the first piston B 9211 is pushed to move towards the fixed end 8 of the drum, and the second piston B 9221 moves towards the power end 9 of the drum; that is, the pyramidal shaft 1 moves towards the power end 9 of the drum, the jaw lever 5 is pushed out, and the sector plate 2 slides on the sliding surface of the pyramidal shaft 1, thereby expanding the diameter of the sector plate 2; the first plunger 61 moves up along the inclined surface of the jaw lever 5, and the second plunger 61 pushes upward with the first plunger 61, driving the jaw bar 41 to push upward, thereby achieving the clamping of the jaw 4.

[0042] This application provides sufficient power by equipping each action with a hydraulic cylinder. Considering that the reduction of the diameter of the sector plate 2 and the opening of the jaws 4 need to be performed synchronously, and the expansion of the diameter of the sector plate 2 and the clamping of the jaws 4 also need to be performed synchronously, the first hydraulic cylinder A 911 controlling the reduction of the diameter of the sector plate 2 and the second hydraulic cylinder A 912 controlling the opening of the jaws 4 are in the same hydraulic circuit, and the first hydraulic cylinder B 921 controlling the expansion of the diameter of the sector plate 2 and the second hydraulic cylinder B 922 controlling the clamping of the jaws 4 are in the same hydraulic circuit, and oil is supplied at the same time, thereby improving the synchronization of the actions of the sector plate 2 and the jaws 4.

[0043] To further improve the synchronization of the actions of the sector plate 2 and the jaws 4, and to eliminate the differences caused by the oil circuit paths of the sector plate and the jaws 4, all four oil cylinders are located at the power end 9. The oil circuit paths of each cylinder are small, and the oil circuit paths are greatly shortened, reducing the risk of oil leakage.

[0044] In reality, when the steel strip is thick, the drum diameter often cannot expand to its maximum due to the limited stroke.

[0045] This application connects a spring bolt 43 below the jaw bar 41, with a spring 45 sleeved on the outside of the spring bolt 43. The upper end of the spring 45 is connected to a spring pressure block 44 as the fixed end of the spring 45. The spring pressure block 44 is connected to the fixed jaw 42. The lower end of the spring 45 is connected to the spring bolt 43 as the free end of the spring 45. Preferably, the lower free end of the spring 45 is connected to the bottom of the spring bolt 43. Both the spring bolt 43 and the spring 45 are located in a slot opened below the jaw bar 41.

[0046] When the jaws 4 clamp the strip steel, the opening between the jaw bars 41 and the fixed jaws 42 is flexibly adjusted according to the thickness of the strip steel: the spring bolt 43 is pushed upward by the action of the spring 45, pushing the inclined surface a 411 of the jaw bars 41 to fit against the inclined surface b 421 of the fixed jaws 42, thereby clamping the strip steel, while the spring 45 is compressed; when the strip steel is too thick, the spring bolt 43 moves downward, which is suitable for strip steel of different thicknesses.

[0047] In addition, such as Figure 8As shown, the fan-shaped plate 2 is provided with limiting members at both ends to restrict the axial displacement of the jaw strip 41. The limiting members can be integrally formed with the fan-shaped plate 2 or fixedly connected to the fan-shaped plate 2. In fact, the structure of this application is to open a long groove along the axial direction of the pyramid axis 1 on the fan-shaped plate 2, which is the jaw 4 structure. The two ends of the groove are provided with baffles as limiting members to prevent the jaw strip 41 from being axially displaced under the drive of the pyramid axis 1, the jaw tie rod 5 and the fan-shaped plate 2, and thus break under shear force, thereby improving the structural stability of the drum.

[0048] The connection between the pyramidal shaft 1 and the power end 9 is made by a nut. When the drum needs to be disassembled for maintenance or replacement, the nut is removed to achieve quick maintenance of the drum.

[0049] The above description is merely a preferred embodiment of this application and an explanation of the technical principles used. Those skilled in the art should understand that the scope involved in this application is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the inventive concept. For example, technical solutions formed by replacing the above-mentioned features with technical features with similar functions disclosed in this application (but not limited to) each other.

[0050] Apart from the technical features described in the specification, the other technical features are known to those skilled in the art. To highlight the innovative features of this invention, the other technical features will not be described in detail here.

Claims

1. A clamp-type hot-rolled coil, comprising a pyramidal shaft (1) and a sector plate (2). The sector plate (2) includes at least two sector plates (2), which together surround the outside of the pyramid axis (1) to form a circumference. The outside of the pyramid axis (1) is provided with a sliding surface. The sector plates (2) are slidably connected on the sliding surface of the pyramid axis (1) through a first wedge structure. Its features are, One of the sector plates (2) has a jaw (4) which clamps and releases the strip steel through a jaw pull rod (5); The pyramidal shaft (1) has an axial through hole inside, and the jaw tie rod (5) is slidably connected in the axial through hole of the pyramidal shaft (1) through a second wedge structure; The reduction in diameter of the sector plate (2) and the loosening of the jaws (4) are driven by the first hydraulic unit; The expansion of the sector plate (2) and the clamping of the jaws (4) are driven by the second hydraulic unit.

2. The clamp-type hot-rolled coil according to claim 1, characterized in that, The jaws (4) are provided with jaw bars (41) and fixed jaws (42). The jaw bars (41) and fixed jaws (42) extend along the axial direction of the drum. In a cross section along the radial direction of the drum, the jaw bars (41) are provided with inclined surfaces a (411) and the fixed jaws (42) are provided with inclined surfaces b (421). Inclined surfaces b (421) are located above inclined surfaces a (411), and an opening for clamping the strip is formed between inclined surfaces a (411) and inclined surfaces b (421).

3. The clamp-type hot-rolled coil according to claim 2, characterized in that, The second wedge structure includes a first plunger (61), which slides on the inclined surface of the jaw lever (5). A second plunger (62) is provided above the first plunger (61). The lower surface of the second plunger (62) is in contact with the upper surface of the first plunger (61), and the upper surface of the second plunger (62) is in contact with the lower surface of the jaw bar (41). As the first plunger (62) slides on the inclined surface of the jaw lever (5), the second plunger (62) moves up and down with the first plunger (61), driving the jaw bar (41) to move, thereby achieving the clamping and loosening of the strip steel.

4. The clamp-type hot-rolled coil according to claim 3, characterized in that, The fan-shaped plate (2) is provided with limiting members at both ends to restrict the axial displacement of the jaw bar (41).

5. The clamp-type hot-rolled coil according to claim 2, characterized in that, A spring bolt (43) is connected below the jaw bar (41). A spring (45) is sleeved on the outside of the spring bolt (43). The spring bolt (43) and the spring (45) are located in the slot below the jaw bar (41). The upper end of the spring (45) is connected to a spring pressure block (44), which is connected to the fixed jaw (42). The lower end of the spring (45) is connected to the spring bolt (43).

6. The clamp-type hot-rolled coil according to claim 1, characterized in that, One end of the pyramidal shaft (1) is connected to the fixed end (8), and the other end is connected to the power end (9); The power end (9) includes a first hydraulic unit for driving the sector plate (2) to reduce its diameter and the jaws (4) to open; And a second hydraulic unit for driving the expansion of the sector plate (2) and clamping of the jaws (4).

7. The clamp-type hot-rolled coil according to claim 6, characterized in that, The first hydraulic unit includes a first hydraulic cylinder A (911) and a second hydraulic cylinder A (912). The first hydraulic cylinder A (911) is provided with a first piston A (9111) connected to the jaw lever (5). The first inlet A (9112) is connected to the rod chamber of the first hydraulic cylinder A (911). The second hydraulic cylinder A (912) is provided with a second piston A (9121) connected to the pyramidal shaft (1), and the second inlet A (9122) is connected to the rodless chamber of the second hydraulic cylinder A (912); The first liquid inlet A (9112), the second liquid inlet A (9122), and the P1 oil inlet (91) are connected.

8. The clamp-type hot-rolled coil according to claim 6, characterized in that, The second hydraulic unit includes a first hydraulic cylinder B (921) and a second hydraulic cylinder B (922). The first hydraulic cylinder B (921) is provided with a first piston B (9211) connected to the jaw lever (5), and the first liquid inlet B (9212) is connected to the rodless chamber of the first hydraulic cylinder B (921); The second hydraulic cylinder B (922) is provided with a second piston B (9221) connected to the pyramidal shaft (1), and the second inlet B (9222) is connected to the rod chamber of the second hydraulic cylinder B (922); The first liquid inlet B (9212), the second liquid inlet B (9222), and the P2 oil inlet (92) are connected.

9. The clamp-type hot-rolled coil according to claim 1, characterized in that, The first wedge structure includes a wear-resistant plate (3), which is fixedly mounted on the sliding surface of the pyramidal shaft (1), and the wear-resistant plate (3) is in contact with the sector plate (2); and / or, The wear-resistant plate (3) is a self-lubricating wear-resistant plate made of carbon fiber; and / or, The wear-resistant plate (3) has a T-shaped structure, and the upper end of the T-shaped structure matches the fan-shaped plate (2).

10. The clamp-type hot-rolled coil according to claim 1, characterized in that, The jaw lever (5) has an air hole (51) inside, which connects the pyramidal shaft (1) and the sector plate (2).

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