A hot-rolled bar cooling bed

Abstract

The present invention provides a hot-rolled bar cooling bed, comprising: a fixed rack fixedly arranged on a straightening plate, including fixed long racks and fixed short racks arranged alternately, and the fixed long racks extend to an alignment roller table; a movable rack movably arranged between adjacent straightening plates and extending to the alignment roller table; a first guide member arranged on the fixed rack and the movable rack within a first selected range on the cooling bed; a second guide member arranged on the movable rack within a second selected range at the alignment roller table; and a third guide member arranged on the fixed long rack within a third selected range at the alignment roller table. The present invention can avoid the rolled piece being "bent by the teeth of the cooling bed" during the "thermal recovery" stage, and avoid the accidents of "snake bend" or "curl" caused by the inability to align due to the "dog leg bend" of the rolled piece itself at the alignment roller table.

Description

Technical Field

[0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a hot-rolled bar cooling bed. Background Art

[0002] The cooling bed is a crucial equipment in many process links of the hot-rolled bar production line. Its main role and function is to achieve rapid cooling of the rolled piece, align the ends of the rolled piece, arrange and gather them, and output them to the cold shear for fixed-length shearing according to the set shear count. At present, the cooling beds of bar production lines at home and abroad basically all adopt the stepping rack structure. The cooling bed rack consists of a fixed rack and a moving rack. The moving rack lifts the rolled piece. With the operation of the cam eccentric mechanism, the rolled piece is moved forward by one tooth pitch and then placed in the next adjacent fixed tooth groove. After completing a cycle, the rolled piece moves forward by one tooth pitch, and the rolled piece is quickly cooled during the lifting and moving process.

[0003] The existing fixed racks and movable racks are arranged in an interlaced manner, suspended in the middle, and there is no guide device on the racks. In this way, when the high-temperature rolled piece on the cooling bed naturally expands (the rolled piece elongates) during the "thermal recovery" stage, it is easy to be restrained by the cooling bed rack on the end of the rolled piece, resulting in "bending". After the tail of the rolled piece is bent, it cannot enter the groove of the alignment roller normally, resulting in the rolled piece being unable to align at the alignment roller, and even causing "snake bend" or "curling", causing serious production accidents and interrupting production.

[0004] Moreover, after the rolled piece enters the alignment roller, the end is easily caught in the gap between the moving rack and the steel guide groove due to the "dog-foot bend" of the rolled piece itself (caused by the multiple-length shear, which cannot be completely avoided), resulting in the rolled piece being unable to be transported to the end positioning baffle for alignment, so that the unaligned ends of the rolled piece have to be sheared off in batches at the cold shear, greatly reducing the yield rate. In severe cases, the rolled piece is stuck in the gap between the moving rack and the steel guide groove, and the driven rack directly lifts it out of the steel guide groove, causing "snake bend" or "curl", directly interrupting production. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a hot-rolled bar cooling bed to solve the problem in the prior art that the rolled piece is "bent" by the cooling bed rack during the "thermal recovery" stage.

[0006] In order to achieve the above-mentioned object and other related objects, the present invention provides a hot-rolled bar cooling bed, wherein the two ends of the cooling bed along the length direction are respectively a cooling bed head and a cooling bed tail, and a plurality of straightening plates are arranged at one end of the cooling bed along the width direction, and an alignment roller is arranged at the other end, comprising:

[0007] A fixed rack, fixedly arranged on the straightening plate, comprises staggered fixed long racks and fixed short racks, wherein the fixed long racks extend to the alignment roller;

[0008] The moving rack is reciprocally movably arranged between adjacent straightening plates and extends to the alignment roller table;

[0009] The first guiding member is arranged on the fixed rack and the moving rack within a first selected range on the cooling bed;

[0010] The second guiding member is arranged on the moving rack within a second selected range at the alignment roller table;

[0011] The third guiding member is arranged on the fixed long rack within a third selected range at the alignment roller table.

[0012] Optionally, the first selected range covers the range where the tail of the rolled piece is located after the rolled piece falls onto the cooling bed and the expansion and contraction range of the rolled piece due to thermal expansion and contraction.

[0013] Optionally, the coverage range of the first selected range in the length direction is from the first row at the head of the cooling bed to the ninth row at the tail of the cooling bed, and the coverage range of the first selected range in the width direction is from the first tooth behind the straightening plate to the termination end of the fixed short rack.

[0014] Optionally, the first guiding member is arranged on the side of the fixed rack and the moving rack facing the tail of the cooling bed and is flush with the tooth groove inclined surface of the fixed rack or the moving rack.

[0015] Optionally, the coverage range of the second selected range in the length direction is from the first row to the third row of the moving rack at the head of the alignment roller table, and the coverage range of the second selected range in the width direction is the same as the width range of the alignment roller table.

[0016] Optionally, the second guiding member is arranged on the side of the moving rack at the alignment roller table facing the tail of the cooling bed and is flush with the tooth groove inclined surface of the moving rack.

[0017] Optionally, both the first guiding member and the second guiding member are guiding blocks, and the guiding block is in the shape of a right triangle. The included angle range of the cross section of the guiding block is 70° - 80°. The width of the guiding block is the same as the size of the tooth groove inclined surface of the fixed rack or the moving rack. The guiding block is made of wear-resistant metal material.

[0018] Optionally, the coverage range of the third selected range in the length direction is from the first row to the third row of the fixed long rack at the head of the alignment roller table, and the coverage range of the second selected range in the width direction is the same as the width range of the alignment roller table.

[0019] Optionally, the third guiding member is a guiding plate, and an inclined guiding surface is arranged at one end of the guiding plate facing the tail of the cooling bed.

[0020] Optionally, the inclination angle range of the guiding surface is 10° - 20°.

[0021] As described above, the present invention has the following beneficial effects:

[0022] By arranging the first guiding members on the fixed racks and moving racks within a selected range of the cooling bed, it is avoided that the rolled piece is "bent by the cooling bed racks" during the "thermal recovery" stage; moreover, by arranging the second guiding members on some of the moving racks at the alignment roller table and arranging the third guiding members on some of the fixed racks at the alignment roller table, it is avoided that the rolled piece cannot be aligned and the phenomena of "snake bend" or "curl" caused by the "dog-leg bend" of the rolled piece itself at the alignment roller table. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Isometric view of the overall structure of the embodiment of the present invention;

[0024] Figure 2 Top view of the overall structure of the embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the partial structure of the alignment roller table of the embodiment of the present invention;

[0026] Figure 4 Installation schematic diagram of the first guiding member on the cooling bed racks;

[0027] Figure 5 Partial schematic diagram after the first guiding member or the second guiding member is installed on the cooling bed racks;

[0028] Figure 6 Schematic diagram of the structure of the first guiding member or the second guiding member.

[0029] Description of Part Reference Numerals

[0030] 1 - straightening plate; 2 - fixed rack; 21 - fixed long rack; 22 - fixed short rack; 3 - moving rack; 4 - alignment roller table; 5 - positioning baffle; 6 - steel-passing guide groove; 7 - first guiding member; 8 - second guiding member; 9 - third guiding member; 9a - guiding surface; 91 - first guiding plate; 92 - second guiding plate; 93 - third guiding plate; 10a - head of the cooling bed; 10b - tail of the cooling bed; A - rolling direction; B - first selected range. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0032] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0033] Please refer to Figures 1 to 3 As shown, the present invention provides a cold bed for rolling bars. The two ends of the cold bed in the length direction are respectively the cold bed head 10a and the cold bed tail 10b. One end of the cold bed in the width direction is provided with a plurality of straightening plates 1, and the other end is provided with an alignment roller table 4, including:

[0034] A fixed rack 2, fixedly arranged on the straightening plate 1, includes fixed long racks 21 and fixed short racks 22 arranged alternately, and the fixed long rack 21 extends to the alignment roller table 4;

[0035] A moving rack 3, reciprocally movably arranged between adjacent straightening plates 1 and extending to the alignment roller table 4;

[0036] A first guiding member 7, arranged on the fixed rack 2 and the moving rack 3 within a first selected range on the cold bed;

[0037] A second guiding member 8, arranged on the moving rack 3 within a second selected range at the alignment roller table 4;

[0038] A third guiding member 9, arranged on the fixed long rack 21 within a third selected range at the alignment roller table 4.

[0039] By installing the first guiding member 7 on the fixed rack 2 and the moving rack 3 within the first selected range on the cold bed, the phenomenon of "bending against" during the "thermal recovery" stage of the rolled piece is effectively avoided; by installing the second guiding member 8 on the moving rack 3 within the second selected range at the alignment roller table 4 and installing the third guiding member 9 on the fixed long rack 21 within the third selected range at the alignment roller table 4, the phenomena of misalignment, "snake bending", or "curling" caused by the "dog leg bend" of the rolled piece itself at the alignment roller table 4 are effectively avoided.

[0040] Specifically, the first selected range covers the range where the tail of the rolled piece is located after the rolled piece falls onto the cold bed and the expansion and contraction range of the rolled piece due to thermal expansion and contraction. In some embodiments, refer to Figure 1 andFigure 2 , the coverage range of the first selected range B in the length direction extends from the first row at the head 10a of the cooling bed to the ninth row at the tail 10b of the cooling bed, and the coverage range of the first selected range B in the width direction extends from the first tooth behind the straightening plate 1 to the termination end of the fixed short rack 22. Specifically, the coverage range in the length direction starts from the first row of racks at the head 10a of the cooling bed and continues continuously until the ninth row of racks (including the fixed rack 2 and the moving rack 3) at the tail 10b of the cooling bed. In other embodiments, the length direction range can be selected according to the actual situation, and it is necessary to ensure that the entire range where the tail of the rolled piece falls after entering the cooling bed and the expansion and contraction range due to thermal expansion and contraction are covered; the coverage range in the width direction extends from the first tooth behind the straightening plate 1 to all the tooth grooves within the termination end of the fixed short rack 22, and it can also be appropriately reduced, but it is necessary to cover the walking range of the rolled piece in the temperature range of thermal expansion and contraction on the cooling bed.

[0041] In some embodiments, referring to Figure 4 and Figure 5 , the first guide member 7 is disposed on the side of the fixed rack 2 and the moving rack 3 facing the tail 10b of the cooling bed and is flush with the tooth groove inclined surface of the fixed rack 2 or the moving rack 3. Considering that the rolling direction A of the rolled piece is from the head 10a of the cooling bed towards the tail 10b of the cooling bed, the first guide member 7 is disposed on the side of the fixed rack 2 and the moving rack 3 within the first selected range B facing the tail 10b of the cooling bed. In this embodiment, the first guide member 7 is disposed on the fixed racks 2 of the first row, the third row, the fifth row, the seventh row, and the ninth row, and on the moving racks 3 of the second row, the fourth row, the sixth row, and the eighth row. Its installation method is to be flush with the corresponding fixed rack 2 or the tooth groove inclined surface of the moving rack 3, so as to ensure the guiding function. In this way, by respectively disposing the first guide member 7 on the fixed rack 2 and the moving rack 3, the guiding function for the suspended part between the fixed rack 2 and the moving rack 3 is achieved, avoiding the "bending against" phenomenon of the tail of the rolled piece during the "thermal recovery" stage, facilitating the normal entry of the rolled piece into the groove of the alignment roller table 4, and also facilitating the subsequent alignment of the rolled pieces on the alignment roller table 4.

[0042] In some embodiments, referring to Figure 2 and Figure 3, the coverage range of the second selected range in the length direction extends from the first row to the third row of the moving racks 3 at the head of the alignment roller table 4, and the coverage range of the second selected range in the width direction is the same as the width range of the alignment roller table 4. Specifically, the coverage range in the length direction starts from the first row of the moving rack 3 at the head of the alignment roller table 4, the second row, and ends at the third row of the moving rack 3. In other embodiments, the length direction range can be selected according to actual situations, and it is necessary to ensure that the tail area of the rolled piece itself is covered; the coverage range in the width direction is all the tooth grooves within the width range of the alignment roller table 4, so as to prevent the end of the rolled piece from getting stuck in the gap between the moving rack 3 and the steel-passing guide groove 6, thereby ensuring that the rolled piece can be transported to the positioning baffle 5 at the end of the alignment roller table 4 for alignment.

[0043] In some embodiments, referring to Figure 3 and Figure 5 , the second guide member 8 is disposed on the side of the moving rack 3 at the alignment roller table 4 facing the tail 10b of the cooling bed, and is flush with the tooth groove inclined surface of the moving rack 3. In this way, by providing the second guide member 8 on the moving rack 3 set at the alignment roller table 4, a guiding effect between the moving rack 3 and the alignment roller table 4 is achieved, ensuring that the rolled piece can be smoothly transported to the positioning baffle 5 of the alignment roller table 4 for alignment.

[0044] In some embodiments, referring to Figure 6 , both the first guide member 7 and the second guide member 8 are guide blocks, and the guide block is in the shape of a right triangle. The included angle α of the cross section of the guide block ranges from 70° to 80°, and the width of the guide block is the same as the size of the tooth groove inclined surface of the fixed rack 2 or the moving rack 3. In this embodiment, the included angle α of the cross section of the guide block is 75°. In this way, it can be ensured that after the guide block is installed on the fixed rack 2 or the moving rack 3, the angle between the tooth groove inclined surface and the inclined surface of the guide block is 15°, so as to ensure that the inclined surface is not too large during guiding. In addition, the guide block is made of wear-resistant metal material to ensure that it can withstand the long-term friction with the rolled piece.

[0045] Referring to Figure 1 and Figure 2 , the alignment roller table 4 is located at the other end of the cooling bed relative to the straightening plate 1. The alignment roller table 4 has a groove, and the tooth grooves on the surface of the fixed rack 2 within the same width range as the roller table are processed into a flat groove. A steel-passing guide groove 6 (arranged alternately with the alignment roller table 4 and covering the length direction of the cooling bed) is arranged above the flat groove, and the horizontal plane of the steel-passing guide groove 6 is lower than the horizontal plane of the roller groove. In this way, when the rolled piece passes through the alignment roller table 4 section, when the moving rack 3 puts down the rolled piece, the rolled piece will fall into the roller groove, and the alignment roller table 4 is always in continuous operation, and the running direction is along the direction of the tail of the rolled piece. Therefore, when the rolled piece falls into the roller groove, the rolled piece can be transported in the direction of the tail through the alignment roller table 4. When the tail of the rolled piece hits the end positioning baffle 5 arranged in front, the alignment of the rolled piece is achieved.

[0046] In some embodiments, referring to Figure 3 , the coverage range of the third selected range in the length direction is from the first row to the third row of the fixed long racks 21 at the head of the alignment roller table 4, and the coverage range of the second selected range in the width direction is the same as the width range of the alignment roller table 4. Specifically, third guiding members 9 are respectively arranged on the fixed long racks 21 of the first row, the second row, and the third row at the head of the alignment roller table 4. In other embodiments, the range in the length direction can be selected according to actual situations.

[0047] In some embodiments, the third guiding member 9 is a guiding plate, and an inclined guiding surface 9a is arranged at one end of the guiding plate facing the tail 10b of the cooling bed. Specifically, as Figure 3 shown, a first guiding plate 91 is arranged on the fixed long rack 21 of the first row at the head of the alignment roller table 4, a second guiding plate 92 is arranged on the fixed long rack 21 of the second row, and a third guiding plate 93 is arranged on the fixed long rack 21 of the third row. The width of the guiding plate matches the width of the alignment roller table 4, and the inclination angle range of the guiding surface 9a is 10° to 20°. In this embodiment, the inclination angle of the guiding surface 9a is 15°.

[0048] In summary, in a hot-rolled bar cooling bed provided by an embodiment of the present invention, by arranging the first guiding members on the fixed racks and the moving racks within the selected range of the cooling bed, it is avoided that the rolled piece is "bent by resistance" by the cooling bed racks during the "thermal recovery" stage; and, by arranging the second guiding members on some of the moving racks at the alignment roller table and the third guiding members on some of the fixed racks at the alignment roller table, it is avoided that the rolled piece cannot be aligned and the phenomena of "dogleg bend", "snake bend", or "curl" occur due to the "dogleg bend" of the rolled piece itself at the alignment roller table.

[0049] The above embodiments only illustratively explain the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A hot-rolled bar cooling bed, with the two ends of the cooling bed in the length direction being the head and the tail of the cooling bed respectively, and a plurality of straightening plates being arranged at one end of the cooling bed in the width direction, and an alignment roller table being arranged at the other end. Characterized in that: It includes: A fixed rack, fixedly arranged on the straightening plate, including fixed long racks and fixed short racks arranged alternately, and the fixed long racks extend to the alignment roller table; A moving rack, reciprocatingly arranged between adjacent straightening plates and extending to the alignment roller table; A first guide member, arranged on the fixed rack and the moving rack within a first selected range on the cooling bed; A second guide member, arranged on the moving rack within a second selected range at the alignment roller table; A third guide member, arranged on the fixed long rack within a third selected range at the alignment roller table; Wherein, the first guide member and the second guide member are both guide blocks, and the guide blocks are right-angled triangles, and the width of the guide blocks is the same as the size of the tooth groove inclined surface of the fixed rack or the moving rack; the third guide member is a guide plate, and an inclined guide surface is arranged at one end of the guide plate facing the tail of the cooling bed, and the width of the guide plate matches the width of the alignment roller table.

2. A hot-rolled bar cooling bed according to claim 1, Characterized in that: The first selected range covers the range where the tail of the rolled piece is located after the rolled piece falls into the cooling bed and the expansion and contraction range of the rolled piece due to thermal expansion and contraction.

3. A hot-rolled bar cooling bed according to claim 2, Characterized in that: The coverage range of the first selected range in the length direction is from the first row at the head of the cooling bed to the ninth row at the tail of the cooling bed, and the coverage range of the first selected range in the width direction is from the first tooth behind the straightening plate to the termination end of the fixed short rack.

4. A hot-rolled bar cooling bed according to claim 2, Characterized in that: The first guide member is arranged on the side of the fixed rack and the moving rack facing the tail of the cooling bed and is flush with the tooth groove inclined surface of the fixed rack or the moving rack.

5. A hot-rolled bar cooling bed according to claim 1, Characterized in that: The coverage range of the second selected range in the length direction is from the first row to the third row of the moving rack at the head of the alignment roller table, and the coverage range of the second selected range in the width direction is the same as the width range of the alignment roller table.

6. A hot-rolled bar cooling bed according to claim 5, Characterized in that: The second guide member is arranged on the side of the moving rack at the alignment roller table facing the tail of the cooling bed and is flush with the tooth groove inclined surface of the moving rack.

7. A hot-rolled bar cooling bed according to claim 1, Characterized in that: The included angle range of the cross section of the guide block is 70° - 80°, and the guide block is made of wear-resistant metal material.

8. A hot-rolled bar cooling bed according to claim 1, Characterized in that: The coverage range of the third selected range in the length direction is from the first row to the third row of the fixed long rack at the head of the alignment roller table, and the coverage range of the second selected range in the width direction is the same as the width range of the alignment roller table.

9. A hot-rolled bar cooling bed according to claim 1, Characterized in that: The inclination angle range of the guide surface is 10° - 20°.

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