Clamping device for large hot-state round steel

Abstract

The utility model belongs to the technical field of hoisting equipment, and provides a clamping device for large hot-state round steel, which comprises two clamping arms movably hinged through a main hinge shaft and two pull rods respectively movably hinged with the two clamping arms through auxiliary hinge shafts, and the tail ends of the two pull rods are movably hinged through a hinge shaft; the clamping arm comprises an upper arm part, a lower arm part and a clamping part which are connected in sequence, the upper arm part is located between the main hinge shaft and the auxiliary hinge shaft, and the clamping part is an arc-shaped hook with a pointed end at the end. According to the clamping device for the large hot-state round steel, the round steel is hoisted by clamping the two ends of the round steel, the phenomenon that the round steel inclines, shakes and even slides and deviates in the hoisting process can be avoided, and therefore the stability of the hoisting process is improved, production safety is guaranteed, and the clamping device is rapid and convenient to use and hang and high in practicability. And hot round steel of different sizes can be flexibly clamped, the hoisting efficiency is effectively improved, and the heat loss of the hot round steel in the hoisting process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of lifting equipment, in particular to a clamping device for large hot round steel. Background Art

[0002] Currently, the lifting and clamping method for hot round steel mostly uses an embracing clamp (clamp) to clamp and lift it. That is, the clamp is opened and encircles the outer diameter of the hot round steel to lift the round steel. However, on the one hand, due to the different outer diameters of the round steel, especially the hot round steel used in the forging process of some large ring forgings, its dimensions (outer diameter and length) are all large, and it is necessary to replace the clamps of different specifications to complete the lifting. On the other hand, if the round steel is long, if the clamp is not clamped near the middle position (center of gravity area), then during the lifting process, the round steel will shake or slide due to the offset of the center of gravity, seriously affecting the safety of the lifting production. The operator needs to constantly adjust the position to avoid shaking, which leads to long time consumption and low efficiency. Since the heat of the hot round steel is continuously dissipated and lost during this process, the subsequent transfer and loading into the furnace needs to be heated again, resulting in low energy utilization.

[0003] In addition, the existing clamps are often in a closed state during the clamping process, and the operator is required to adjust the clamp opening angle. For some large hot round steels, adjusting the clamp opening angle takes a lot of time. On the one hand, the operator is continuously exposed to high temperature during this process, which is very dangerous. On the other hand, heat is continuously dissipated and lost, reducing resource utilization. At the same time, after the hoist lifts the round steel to the designated unloading point, the clamp opens to unload the round steel. When the lifting crane pulls the hoist upward, the clamp is very likely to close and clamp the round steel under the action of gravity, making it difficult to disengage the clamp, affecting the efficiency of round steel unloading.

[0004] Therefore, it is necessary to design a clamping device for large hot round steel that can effectively solve the above-mentioned defects of existing clamps. Summary of the Invention

[0005] In order to solve the above technical problems, the utility model proposes a clamping device for large hot round steel, which completes the lifting of the round steel by clamping the two ends of the round steel, thereby avoiding the round steel from tilting, shaking or even sliding and deviating during the lifting process, thereby improving the stability of the lifting process and ensuring production safety. It is also quick and convenient to use and can flexibly clamp hot round steel of different sizes, effectively improving the lifting efficiency and reducing the heat loss of the hot round steel during the lifting process.

[0006] The technical solution of the utility model is:

[0007] The utility model provides a clamping device for large hot round steel, comprising two clamping arms movably hinged by a main hinge shaft, and two pull rods movably hinged to the two clamping arms respectively by a secondary hinge shaft, wherein the ends of the two pull rods are movably hinged by a hinge shaft;

[0008] The clamping arm includes an upper arm portion, a lower arm portion, and a clamping portion which are connected in sequence. The upper arm portion is located between the main hinge shaft and the auxiliary hinge shaft. The clamping portion is an arc-shaped hook with a pointed end.

[0009] Preferably, the length of the lower arm portion is greater than the length of the upper arm portion, and the length of the pull rod is greater than the length of the upper arm portion.

[0010] Preferably, the angle formed by the tangent line of the end of the clamping portion and the lower arm portion is between 0° and 60°.

[0011] Preferably, the two clamping arms are symmetrical and arranged in a staggered manner front to back, and the two pull rods are symmetrical and arranged in a staggered manner front to back;

[0012] The clamping arm located at the front side is connected to the pull rod located at the rear side, and the clamping arm located at the rear side is connected to the pull rod located at the front side.

[0013] Preferably, the clamping device for large hot round steel provided by the present invention also includes a positioning plate, and the two ends of the positioning plate are respectively connected to the two secondary hinge shafts, or the two ends of the positioning plate are respectively connected to the main hinge shaft and the root hinge shaft to fix and limit the clamping arm and the pull rod.

[0014] Preferably, the positioning plate is provided with a plurality of slots spaced apart along its length, and a post adapted to the slot is provided at the outer end of one of the secondary hinge shafts;

[0015] One end of the positioning plate is movably hinged to the other secondary hinge shaft, and the other end is fixedly connected to the secondary hinge shaft by being embedded in the clamping slots at different positions through the clamping column.

[0016] Preferably, the positioning plate is provided with a plurality of slots spaced apart along its length, and the outer end of the main hinge shaft is provided with a post adapted to the slots;

[0017] One end of the positioning plate is movably hinged to the root hinge shaft, and the other end is fixedly connected to the main hinge shaft by being embedded in the clamping slots at different positions through the clamping column.

[0018] Preferably, the clamping device for large hot round steel provided by the present invention further includes a hanging seat arranged at the position of the root hinge shaft, and the two pull rods are movably hinged to the hanging seat through the root hinge shaft.

[0019] Preferably, the suspension seat comprises two side plates respectively fixedly connected to the two ends of the hinge shaft, and a lifting shaft located between the two side plates;

[0020] The lifting shaft is located above the hinge shaft and is arranged parallel to the hinge shaft.

[0021] Preferably, the clamping arms and the pull rods are provided in two groups in parallel, and a plurality of reinforcing ribs are provided at intervals between the lower arm portions and the clamping portions of the two groups of clamping arms.

[0022] Compared with the prior art, the present invention has the following advantages and effects:

[0023] (1) Two clamping arms and two pull rods are symmetrically arranged and movably hinged. The clamping arms are used to clamp and fix the two ends of the hot round steel, thereby achieving smooth lifting of the hot round steel, improving the stability of the round steel during lifting, avoiding tilting, shaking, and even sliding, and ensuring safety in the production process. In addition, during the lifting process, the larger the size and weight of the hot round steel, the tighter the clamping arms on both sides clamp the two ends of the round steel under the action of gravity, thereby improving the stability and reliability of the lifting process;

[0024] (2) Two clamping arms are movably hinged through a main hinge shaft, and the length of the lower arm of the clamping arm is greater than that of the upper arm, so that the distance between the clamping parts at the end of the clamping arm can be adjusted in a wide range, thereby adapting to hot round steel of different lengths and sizes, improving the practicality and applicability of the clamping device, and reducing the production and operation costs of the enterprise;

[0025] (3) A positioning plate with a fixed limit function is used to fix the clamp arm and the pull rod through the positioning plate, so that the clamping end of the clamp arm can be positioned to the two ends of the hot round steel before clamping, reducing the time the operator is exposed to the hot round steel and ensuring the personal safety of the operator. At the same time, it is convenient for the clamp arm to separate from the hot round steel after unloading the round steel, avoiding the clamp arm automatically clamping the hot round steel under the action of gravity during the upward lifting of the pull rod, thereby improving the clamping and lifting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of the clamping device for large hot round steel in the embodiment 1 of the present utility model in use;

[0027] Figure 2 This is a structural diagram of a large hot round steel clamping device for clamping hot round steels of different lengths in Example 1 of the present utility model;

[0028] Figure 3 This is a schematic structural diagram of a clamping device for large hot round steel in Example 2 of the present utility model;

[0029] Figure 4 This is another structural diagram of the clamping device for large hot round steel in Example 2 of the present utility model;

[0030] Figure 5 This is a schematic structural diagram of a clamping device for large hot round steel in Example 3 of the present utility model;

[0031] Figure 6 This is a schematic structural diagram of a clamping device for large hot round steel in Example 4 of the present utility model.

[0032] Figure numerals: 1. Clamping arm; 11. Upper arm; 12. Lower arm; 13. Clamping part; 2. Pull rod; 3. Main hinge shaft; 4. Secondary hinge shaft; 5. Root hinge shaft; 6. Positioning plate; 61. Clamping slot; 7. Clamping column; 8. Hanging seat; 81. Side plate; 82. Lifting shaft; 9. Hot round steel. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in conjunction with specific implementation methods.

[0034] Example 1:

[0035] like Figure 1~Figure 2 As shown, the utility model provides a clamping device for large hot round steel, including two clamping arms 1 movably hinged by a main hinge shaft 3, two pull rods 2 movably hinged to the two clamping arms 1 through two secondary hinge shafts 4, and a hanging seat 8. The two pull rods 2 are movably hinged to the hanging seat 8 through a root hinge shaft 5. The hanging seat 8 is arranged at the position of the root hinge shaft 5. During the lifting process, the crane can be connected to the hanging seat 8.

[0036] One end of the two pull rods 2 is respectively hinged to the two clamping arms 1 through the secondary hinge shaft 4, and the other end is hinged to the root hinge shaft 5. Figure 1 As shown, the two clamping arms 1 and the two pull rods 2 are arranged symmetrically on the left and right, that is, the root hinge axis 5 and the main hinge axis 3 are located at the left and right symmetrical center positions of the overall clamping device to improve the stability of the clamping and avoid the phenomenon of round steel shaking or tilting and offsetting.

[0037] The hanging seat 8 includes two side plates 81 fixedly connected to the two ends of the root hinge shaft 5 respectively, and a lifting shaft 82 located between the two side plates 81. The lifting shaft 82 is located above the root hinge shaft 5 and arranged parallel to it.

[0038] like Figure 1As shown, the clamping arm 1 includes an upper arm portion 11, a lower arm portion 12, and a clamping portion 13 connected in sequence. The clamping arm 1 is provided with a through hole (not shown in the figure) adapted to the main hinge shaft 3 and the secondary hinge shaft 4. The upper arm portion 11 is located between the connection position of the main hinge shaft 3 and the connection position of the secondary hinge shaft 4. As shown in the reference figure, the upper arm portion 11 is located at the upper end of the through hole of the main hinge shaft 3 of the clamping arm 1, the lower arm portion 12 is located at the lower end of the through hole of the main hinge shaft 3 of the clamping arm 1, and the clamping portion 13 is located at the end of the lower end of the clamping arm 1.

[0039] Optionally, in some embodiments, the upper arm portion 11 , the lower arm portion 12 , and the clamping portion 13 are connected in an integrated structure to ensure the overall toughness of the clamping arm 1 .

[0040] The clamping portion 13 is an arc-shaped hook with a pointed tip at the end, and the angle between the tangent line of the clamping portion 13 and the lower arm portion 12 is 45 degrees. Figure 1 and Figure 2 As shown, the tip end of the clamping portion 13 is symmetrically clamped against the end faces of the two ends of the hot round steel 9. It should be noted that during specific use, the tip end of the clamping portion 13 is preferentially clamped against the upper half center area of ​​the end faces of the hot round steel 9 to avoid lateral stress generated by the hot round steel 9 rotating around its axis during the lifting and hoisting process, thereby improving the stability and reliability of the hot round steel 9 during the lifting process.

[0041] refer to Figure 1 、 Figure 2 As shown, the length of the lower arm 12 is greater than that of the upper arm 11, and the length of the pull rod 2 is greater than that of the upper arm 11, so that the two clamping arms 1 can be opened to the maximum angle (close to 180°), thereby making the clamping distance between the clamping portions 13 of the two clamping arms 1 (the length of the hot round steel 9 that can be clamped) larger, thereby adapting to hot round steels 9 of different specifications and sizes without the need to replace different clamping devices, greatly reducing the company's production and operation costs.

[0042] like Figure 1 As shown, the two clamping arms 1 are staggered front to back, and the two pull rods 2 are staggered front to back. The clamping arm 1 at the front is connected to the pull rod 2 at the rear, and the clamping arm 1 at the rear is connected to the pull rod 2 at the front, so that the overall structure is more compact and avoids offset and shaking caused by excessive distance between the hinge points.

[0043] Example 2:

[0044] For Example 2 of the present utility model, Figure 3 、 Figure 4 Note that, descriptions of parts that are the same as those in Example 1 are omitted and are given the same reference numerals.

[0045] like Figure 3 、 Figure 4 As shown, the clamping device for large hot round steel involved in the present invention further includes a positioning plate 6, both ends of which are respectively connected to the two auxiliary hinge shafts 4 to fix and limit the clamping arm 1 and the pull rod 2.

[0046] The positioning plate 6 is provided with a number of slots 61 spaced apart along its length direction. The outer end of the right auxiliary hinge shaft 4 is provided with a clamping column 7 adapted to the slot 61. The clamping column 7 and the positioning plate 6 are arranged on the same side (front side). One end of the positioning plate 6 is movably hinged to the left auxiliary hinge shaft 4, and the other end is fixedly connected to the right auxiliary hinge shaft 4 through the clamping column 7 embedded in the slots 61 at different positions, so as to realize the fixed limitation of the clamping arm 1 and the pull rod 2.

[0047] By rotating the positioning plate 6, the clamping column 7 can be disengaged from the clamping slot 61 of the positioning plate 6. During the lifting process and the hoisting process, the clamping column 7 is in a disengaged state from the clamping slot 61. Figure 3 After the cam 6 is lifted, the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted and the clamping rod 13 is lifted

[0048] Optionally, in some embodiments, the positioning plate 6 is detachably connected to the left secondary hinge shaft 4, that is, during the lifting and hoisting process, the positioning plate 6 is in a disassembled state and is not installed. The positioning plate 6 is installed before the initial clamping and during the unloading process to fix the clamping arm 1 and the pull rod 2.

[0049] Example 3:

[0050] For Example 3 of the present utility model, Figure 5 Note that, descriptions of parts that are the same as those in Example 2 are omitted and are given the same reference numerals.

[0051] like Figure 5As shown, the present invention relates to a clamping device for large hot round steel, wherein both ends of a positioning plate 6 are respectively connected to a main hinge shaft 3 and a root hinge shaft 5 to fix and limit the clamping arm 1 and the pull rod 2.

[0052] The outer end of the main hinge shaft 3 is provided with a clamping column 7 that is compatible with the clamping slot 61. The clamping column 7 and the positioning plate 6 are arranged on the same side (front side). One end of the positioning plate 6 is movably hinged to the root hinge shaft 5, and the other end is fixedly connected to the main hinge shaft 3 through the clamping column 7 that is embedded in the clamping slot 61 at different positions to achieve fixed limiting of the clamping arm 1 and the pull rod 2. It should be noted that its specific usage process and usage principle can refer to the description in Example 2, which will not be repeated here.

[0053] Optionally, in some embodiments, the clamping column 7 can also be set at the outer end of the root hinge shaft 5. In this case, one end of the positioning plate 6 is movably hinged to the main hinge shaft 3, and the other end is fixedly connected to the root hinge shaft 5 by being embedded in the clamping slot 61 at different positions through the clamping column 7.

[0054] Optionally, in some embodiments, the positioning plate 6 is detachably connected to the main hinge shaft 3 or the root hinge shaft 5 , that is, during the lifting and hoisting process, the positioning plate 6 can be removed and placed independently.

[0055] Example 4:

[0056] For Example 4 of the present utility model, Figure 6 Note that, descriptions of parts that are the same as those in Example 1 are omitted and are given the same reference numerals.

[0057] like Figure 6 As shown, the present invention relates to a clamping device for large hot round steel, wherein two groups of clamping arms 1 and pull rods 2 are arranged in parallel, and a plurality of reinforcing ribs are arranged between the lower arm portions 12 and the clamping portions 13 of the two groups of clamping arms 1.

[0058] Optionally, in some embodiments, both ends of the reinforcing rib are respectively and vertically fixedly connected to the inner sides of two sets of clamping arms arranged in parallel to improve the overall toughness of the clamping arm 1, thereby increasing the stability and reliability of the overall clamping device.

[0059] To sum up, the clamping device for large hot round steel provided by the utility model completes the lifting of the round steel by clamping the two ends of the round steel, which can avoid the round steel from tilting, shaking or even sliding and offsetting during the lifting process, thereby improving the stability of the lifting process and ensuring production safety. It is also quick and convenient to use and can flexibly clamp hot round steel of different sizes, effectively improving the lifting efficiency and reducing the heat loss of the hot round steel during the lifting process.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A clamping device for large hot round steel, characterized by: It comprises two clamping arms (1) movably hinged via a main hinge shaft (3), and two pull rods (2) movably hinged to the two clamping arms (1) via a secondary hinge shaft (4), and the ends of the two pull rods (2) are movably hinged via a hinge shaft (5); The clamping arm (1) comprises an upper arm portion (11), a lower arm portion (12), and a clamping portion (13) connected in sequence, wherein the upper arm portion (11) is located between the main hinge shaft (3) and the secondary hinge shaft (4), and the clamping portion (13) is an arc-shaped hook with a pointed end. The length of the lower arm portion (12) is greater than the length of the upper arm portion (11), and the length of the pull rod (2) is greater than the length of the upper arm portion (11).

2. The large hot round steel gripping device according to claim 1, characterized in that: The angle formed by the tangent line of the end of the clamping portion (13) and the lower arm portion (12) is between 0° and 60°.

3. The large hot round steel gripping device according to claim 1, characterized in that: The two clamping arms (1) are symmetrical and arranged in a staggered manner front to back, and the two pull rods (2) are symmetrical and arranged in a staggered manner front to back; The clamping arm (1) located at the front side is connected to the pull rod (2) located at the rear side, and the clamping arm (1) located at the rear side is connected to the pull rod (2) located at the front side.

4. The large hot round steel gripping device according to any one of claims 1 to 3, characterized in that: It also includes a positioning plate (6), the two ends of which are respectively connected to the two secondary hinge shafts (4), or the two ends of which are respectively connected to the main hinge shaft (3) and the root hinge shaft (5), so as to fix and limit the clamping arm (1) and the pull rod (2).

5. The large hot round steel gripping device according to claim 4, characterized in that: The positioning plate (6) is provided with a plurality of slots (61) spaced apart along its length, and a post (7) adapted to the slot (61) is provided at the outer end of one of the secondary hinge shafts (4); One end of the positioning plate (6) is movably hinged to the other secondary hinge shaft (4), and the other end is fixedly connected to the secondary hinge shaft (4) by being embedded in the clamping slot (61) at a different position via the clamping column (7).

6. The large hot round steel gripping device according to claim 4, characterized in that: The positioning plate (6) is provided with a plurality of slots (61) spaced apart along its length, and the outer end of the main hinge shaft (3) is provided with a clamping column (7) adapted to the slots (61); One end of the positioning plate (6) is movably hinged to the root hinge shaft (5), and the other end is fixedly connected to the main hinge shaft (3) by being embedded in the clamping slots (61) at different positions via the clamping column (7).

7. The large hot round steel gripping device according to any one of claims 1 to 3, characterized in that: It also includes a hanging seat (8) arranged at the position of the root hinge shaft (5), and the two pull rods (2) are both movably hinged to the hanging seat (8) through the root hinge shaft (5).

8. The large hot round steel gripping device according to claim 7, characterized in that: The hanging seat (8) comprises two side plates (81) respectively fixedly connected to the two ends of the hinge shaft (5), and a lifting shaft (82) located between the two side plates (81); The lifting shaft (82) is located above the root hinge shaft (5) and is arranged parallel to it.

9. The large hot round steel gripping device according to any one of claims 1 to 3, characterized in that: The clamping arms (1) and the pull rods (2) are both arranged in two groups in parallel, and a plurality of reinforcing ribs are arranged at intervals between the lower arm portions (12) and the clamping portions (13) of the two groups of clamping arms (1).

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