A multi-flow billet unloading system and method

Abstract

This invention discloses a multi-strand continuous casting billet unloading system and method, belonging to the field of continuous casting technology in steel production. To achieve rapid unloading of special steel small square billets with 8 or more strands, the multi-strand continuous casting billet unloading system includes a cooling bed (4) arranged on the left and right sides and an unloading roller conveyor group (2). A steel-retrieving machine (1) is arranged above the unloading roller conveyor group (2). The unloading roller conveyor group (2) contains multiple unloading rollers (21) arranged at intervals along the left-right direction. The conveying direction of the unloading rollers (21) is the front-back direction. The steel-retrieving machine (1) can retrieve the billets (7) from multiple unloading rollers (21) at once and move the billets (7) to the left. The cooling bed (4) enables the billets (7) to move to the left. The multi-strand continuous casting billet unloading system and method can achieve unscratched unloading of 12-strand continuous casting billets, and is applicable to the continuous casting production requirements of special steel small square billets.

Description

Technical Field

[0001] This invention relates to the field of continuous casting technology in steel production, specifically to a multi-strand continuous casting billet discharge system and a multi-strand continuous casting billet discharge method. Background Technology

[0002] With industrial development, converters and electric furnaces are becoming increasingly larger. Using large smelting furnaces can improve production efficiency, reduce environmental pollution, and lower production costs. Smelting and continuous casting machine production are synchronized. Due to the increased smelting capacity, the number of continuous casting runs also increases accordingly. Because of the small cross-section and high casting speed of small-section billets, the billet discharge rhythm becomes a limiting factor in matching continuous casting machine production with smelting furnace production as the number of runs increases. Since special steel requires high billet quality, the conventional method of using a pusher for small square billets can cause scratches. Using a scooping machine can avoid these scratches, but when the continuous casting machine exceeds eight runs, the scooping machine's billet discharge cycle cannot meet production requirements. Summary of the Invention

[0003] To achieve rapid billet ejection for special steel small square billets with 8 or more strands, this invention provides a multi-strand continuous casting billet ejection system and method. The multi-strand continuous casting billet ejection system and method can achieve scratch-free ejection of 12-strand continuous casting billets, which is applicable to the continuous casting production requirements of special steel small square billets.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A multi-flow billet unloading system includes a cooling bed and a billet unloading roller conveyor group arranged on the left and right sides. A steel scooping machine is arranged above the billet unloading roller conveyor group. The billet unloading roller conveyor group contains multiple billet unloading rollers arranged at intervals along the left and right direction. The conveying direction of the billet unloading rollers is the front and back direction. The steel scooping machine can scoop up the billets on multiple billet unloading rollers at one time and move the billets to the left. The cooling bed can make the billets move to the left.

[0006] A method for unloading multi-flow billets, wherein the method employs the aforementioned multi-flow billet unloading system, and the billet scooping machine can scoop up billets from three unloading rollers at a time and move the billets to the left. The unloading roller group contains twelve unloading rollers.

[0007] The multi-strand continuous casting billet unloading method includes the following steps:

[0008] Step 1: The steel scooping machine scoops up the billets from the first billet discharge roller, the second billet discharge roller, and the third billet discharge roller in one go and moves the billets to the left.

[0009] Step 2: The steel scooping machine scoops up the billets from the fourth, fifth, and sixth billet discharge rollers at once and moves the billets to the left.

[0010] Step 3: The steel scooping machine scoops up the billets from the seventh, eighth, and ninth billet discharge rollers at once and moves the billets to the left.

[0011] Step 4: The steel scooping machine scoops up the billets from the tenth, eleventh, and twelfth billet exit rollers at once and moves the billets to the left.

[0012] The beneficial effects of the present invention are: the multi-strand continuous casting billet discharge system and method can achieve scratch-free discharge of 12-strand continuous casting billets, which is applicable to the continuous casting production requirements of special steel small square billets. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0014] Figure 1 This is a top view schematic diagram of the multi-flow billet unloading system described in this invention.

[0015] Figure 2 It is along Figure 1 Cross-sectional view along the AA direction.

[0016] Figure 3 This is a cross-sectional schematic diagram of a steel scooping machine.

[0017] Figure 4 This is a simplified schematic diagram of a steel scooping machine.

[0018] Figure 5 This is a schematic diagram of a stepper moving steel machine.

[0019] The annotations in the attached figures are explained as follows:

[0020] 1. Steel scooping machine; 2. Billet discharge roller conveyor group; 3. Walking beam steel transfer machine; 4. Cooling bed; 5. Billet collection bed; 6. Emergency unloading platform; 7. Billet;

[0021] 21. Billet discharge roller conveyor;

[0022] 101. Horizontal moving frame; 102. Steel scooping lifting frame; 103. Steel scooping claw; 104. Column; 105. Horizontal bar; 106. Diagonal bar;

[0023] 201. First billet exit roller conveyor; 202. Second billet exit roller conveyor; 203. Third billet exit roller conveyor; 204. Fourth billet exit roller conveyor; 205. Fifth billet exit roller conveyor; 206. Sixth billet exit roller conveyor; 207. Seventh billet exit roller conveyor; 208. Eighth billet exit roller conveyor; 209. Ninth billet exit roller conveyor; 2010. Tenth billet exit roller conveyor; 2011. Eleventh billet exit roller conveyor; 2012. Twelfth billet exit roller conveyor;

[0024] 301. Crossbeam;

[0025] 1031. First steel claw retrieval; 1032. Second steel claw retrieval; 1033. Third steel claw retrieval. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] A multi-flow billet unloading system includes a cooling bed 4 arranged on the left and right sides and an unloading roller conveyor group 2. A steel scooping machine 1 is positioned above the unloading roller conveyor group 2. The unloading roller conveyor group 2 contains multiple unloading rollers 21 arranged at intervals along the left-right direction. The conveying direction of the unloading rollers 21 is the front-back direction. The steel scooping machine 1 can scoop up the billets 7 from multiple unloading rollers 21 at a time and move the billets 7 to the left. The cooling bed 4 enables the billets 7 to move to the left. Figure 1 and Figure 2 As shown.

[0028] In this embodiment, the steel-collecting machine 1 includes a transverse frame 101, which extends in the front-to-back direction and can move in the left-to-right direction. Multiple steel-collecting lifting frames 102 are mounted on the transverse frame 101, and these frames are arranged at intervals in the front-to-back direction. The transverse frame 101 also includes a lifting frame lifting drive mechanism, which drives the multiple steel-collecting lifting frames 102 to move synchronously up and down. The steel-collecting machine 1 can utilize existing technology, such as Chinese Patent CN 103611904 A, published on March 5, 2014, entitled "A Transverse Steel-Collecting Device".

[0029] In this embodiment, the front and rear ends of the transverse frame 101 are provided with traveling wheels, enabling the transverse frame 101 to move in the left and right directions. This allows the lifting and lowering drive mechanism of the lifting frame and the multiple steel-collecting lifting frames 102 to move in the left and right directions along with the transverse frame 101. The multiple steel-collecting lifting frames 102 can be raised and lowered synchronously. Each steel-collecting lifting frame 102 is connected to multiple steel-collecting claws 103, which are arranged at intervals in the left and right directions. The steel-collecting claws 103 and the steel-collecting lifting frames 102 are relatively stationary. Figures 1 to 4 As shown.

[0030] In this embodiment, the steel-collecting lifting frame 102 includes a column 104 and a crossbar 105. The crossbar 105 extends in the left-right direction. The lower end of the column 104 is connected and fixed to the middle of the crossbar 105. Each steel-collecting lifting frame 102 is connected to three steel-collecting claws 103. From right to left, the three steel-collecting claws 103 are sequentially designated as the first steel-collecting claw 1031, the second steel-collecting claw 1032, and the third steel-collecting claw 1033. From right to left, the distance between any two adjacent steel-collecting claws 103 is the same.

[0031] In this embodiment, the upper part of the first scooping claw 1031 is fixedly connected to the right end of the crossbar 105, the upper part of the second scooping claw 1032 is fixedly connected to the middle part of the crossbar 105, and the upper part of the third scooping claw 1033 is fixedly connected to the left end of the crossbar 105. A diagonal brace 106 connects the column 104 and the crossbar 105. The diagonal brace 106 is located on the left and right sides of the column 104, respectively, and the length of the diagonal brace 106 on the left side of the column 104 is greater than the length of the diagonal brace 106 on the right side of the column 104.

[0032] In this embodiment, the billet exit roller group 2 includes twelve billet exit rollers 21. From right to left, the twelve billet exit rollers 21 are sequentially: first billet exit roller 201, second billet exit roller 202, third billet exit roller 203, fourth billet exit roller 204, fifth billet exit roller 205, sixth billet exit roller 206, seventh billet exit roller 207, eighth billet exit roller 208, ninth billet exit roller 209, tenth billet exit roller 2010, eleventh billet exit roller 2011, and twelfth billet exit roller 2012. Figure 1 and Figure 2 As shown.

[0033] Along the right-to-left direction, the distance between two adjacent billet discharge rollers 21 is the same, and the distance between two adjacent billet discharge rollers 21 is equal to the distance between two adjacent steel-catching claws 103. The steel-catching machine 1 can scoop up multiple billet 7s from the billet discharge rollers 21 at once and move the billet 7s to the left. This means that the steel-catching lifting frame 102 of the steel-catching machine 1 can scoop up multiple billet 7s from the billet discharge rollers 21 and move the billet 7s to the left in one descent and rise. Figure 1 and Figure 2 As shown.

[0034] In this embodiment, a walking beam transfer machine 3 is arranged between the cooling bed 4 and the billet discharge roller assembly 2 in the left-right direction. The walking beam transfer machine 3 enables the billet 7 to move to the left, and the billet scooping machine 1 can scoop up the billet 7 on the billet discharge roller assembly 21 and move the billet 7 onto the walking beam transfer machine 3. The walking beam transfer machine 3 can then move the billet 7 onto the cooling bed 4. Figure 5 As shown. The stepper steel transfer machine 3 can use existing technology products.

[0035] In this embodiment, the multi-flow billet discharge system further includes a billet collection bed 5 and an emergency discharge platform 6. The billet collection bed 5 is located to the left of the cooling bed 4, and the emergency discharge platform 6 is located to the right of the billet discharge roller assembly 2. The billets 7 on the cooling bed 4 can be moved to the billet collection bed 5, and the steel scooping machine 1 can scoop up the problematic billets 7 on the billet discharge roller assembly 21 and move them to the emergency discharge platform 6. Both the billet collection bed 5 and the emergency discharge platform 6 can be existing technology products, such as... Figure 1 and Figure 2 As shown.

[0036] The following describes a method for unloading multi-flow continuous casting billets. This method utilizes the aforementioned multi-flow continuous casting billet unloading system. The steel scooping machine 1 can scoop up the billets 7 from three unloading roller conveyors 21 at a time and move the billets 7 to the left. The multi-flow continuous casting billet unloading method includes the following steps:

[0037] Step 1: The steel scooping machine 1 scoops up the billet 7 on the first billet discharge roller 201, the second billet discharge roller 202 and the third billet discharge roller 203 at one time and moves the billet 7 to the left;

[0038] Step 2: The steel scooping machine 1 scoops up the billet 7 on the fourth billet discharge roller 204, the fifth billet discharge roller 205 and the sixth billet discharge roller 206 at one time and moves the billet 7 to the left;

[0039] Step 3: The steel scooping machine 1 scoops up the billet 7 on the seventh billet discharge roller 207, the eighth billet discharge roller 208 and the ninth billet discharge roller 209 at one time and moves the billet 7 to the left;

[0040] Step 4: The steel scooping machine 1 scoops up the billet 7 on the tenth billet discharge roller 2010, the eleventh billet discharge roller 2011 and the twelfth billet discharge roller 2012 at one time and moves the billet 7 to the left.

[0041] In step 1, after the billet 7 is cut by the fire-cutting machine, the billet 7 sequentially enters the first billet exit roller conveyor 201, the second billet exit roller conveyor 202, and the third billet exit roller conveyor 203. The steel-collecting lifting frame 102 moves until the first steel-collecting claw 1031, the second steel-collecting claw 1032, and the third steel-collecting claw 1033 correspond one-to-one with the first billet exit roller conveyor 201, the second billet exit roller conveyor 202, and the third billet exit roller conveyor 203, respectively, and the steel-collecting machine 1 picks it up in one go. The billets 7 on the first billet conveyor 201, the second billet conveyor 202 and the third billet conveyor 203 (the first steel claw 1031 picks up the billet 7 on the first billet conveyor 201, the second steel claw 1032 picks up the billet 7 on the second billet conveyor 202 and the third steel claw 1033 picks up the billet 7 on the third billet conveyor 203) are moved to the left onto the stepping steel transfer machine 3 and the steel lifting frame 102 returns to the waiting position.

[0042] In step 2, after the billet 7 is cut by the fire-cutting machine, the billet 7 sequentially enters the fourth billet exit roller conveyor 204, the fifth billet exit roller conveyor 205, and the sixth billet exit roller conveyor 206. The steel-collecting lifting frame 102 moves until the first steel-collecting claw 1031, the second steel-collecting claw 1032, and the third steel-collecting claw 1033 correspond one-to-one with the fourth billet exit roller conveyor 204, the fifth billet exit roller conveyor 205, and the sixth billet exit roller conveyor 206, respectively, and the steel-collecting machine 1 picks it up in one go. The billet 7 on the fourth billet conveyor 204, the fifth billet conveyor 205 and the sixth billet conveyor 206 (the first steel claw 1031 picks up the billet 7 on the fourth billet conveyor 204, the second steel claw 1032 picks up the billet 7 on the fifth billet conveyor 205 and the third steel claw 1033 picks up the billet 7 on the sixth billet conveyor 206) and moves the billet 7 to the left onto the stepping steel transfer machine 3, and the steel lifting frame 102 returns to the waiting position;

[0043] In step 3, after the billet 7 is cut by the fire-cutting machine, the billet 7 sequentially enters the seventh billet exit roller conveyor 207, the eighth billet exit roller conveyor 208, and the ninth billet exit roller conveyor 209. The steel-collecting lifting frame 102 moves until the first steel-collecting claw 1031, the second steel-collecting claw 1032, and the third steel-collecting claw 1033 correspond one-to-one with the seventh billet exit roller conveyor 207, the eighth billet exit roller conveyor 208, and the ninth billet exit roller conveyor 209, respectively, and the steel-collecting machine 1 picks it up in one go. The billet 7 on the seventh billet conveyor 207, the eighth billet conveyor 208 and the ninth billet conveyor 209 (the first steel claw 1031 picks up the billet 7 on the seventh billet conveyor 207, the second steel claw 1032 picks up the billet 7 on the eighth billet conveyor 208, and the third steel claw 1033 picks up the billet 7 on the ninth billet conveyor 209) and moves the billet 7 to the left onto the stepping steel transfer machine 3, and the steel lifting frame 102 returns to the waiting position;

[0044] In step 4, after the billet 7 is cut by the fire-cutting machine, the billet 7 sequentially enters the tenth billet exit roller conveyor 2010, the eleventh billet exit roller conveyor 2011, and the twelfth billet exit roller conveyor 2012. The steel-collecting lifting frame 102 moves until the first steel-collecting claw 1031, the second steel-collecting claw 1032, and the third steel-collecting claw 1033 correspond one-to-one with the tenth billet exit roller conveyor 2010, the eleventh billet exit roller conveyor 2011, and the twelfth billet exit roller conveyor 2012, respectively, and the steel-collecting machine 1 picks it up in one go. The billet 7 on the tenth billet conveyor 2010, the eleventh billet conveyor 2011, and the twelfth billet conveyor 2012 is picked up by the first steel claw 1031 (the first steel claw 1031 picks up the billet 7 on the tenth billet conveyor 2010, the second steel claw 1032 picks up the billet 7 on the eleventh billet conveyor 2011, and the third steel claw 1033 picks up the billet 7 on the twelfth billet conveyor 2012) and the billet 7 is moved to the left onto the stepping steel transfer machine 3, and the steel lifting frame 102 returns to the waiting position.

[0045] Step 5: Repeat steps 1 to 4 in sequence to achieve continuous cyclic billet output of multi-flow continuous casting.

[0046] After the billet 7 is placed on the walking beam transfer machine 3, the walking beam transfer machine 3 moves the billet 7 step by step to the cooling bed 4. The cooling bed 4 has a stepping flipping function, and the billet 7 is flipped and cooled on the cooling bed 4. After passing through the cooling bed 4, the billet 7 enters the billet collection bed 5. The billet collection bed 5 holds the billet 7 together and uses clamps or disks to remove the billet 7 to the designated position.

[0047] The stepping steel transfer machine 3 lifts the billet 7 and moves it one position by means of a hydraulically driven moving crossbeam 301. The billet 7 and the crossbeam 301 do not slide against each other, thus avoiding scratches on the billet. By repeating steps 1 to 4, the billet is discharged from the continuous casting machine 12. Because the steel scooping machine performs a lifting and lowering action, the billet does not move laterally, so this system can produce steel grades where scratches on the billet are not allowed. If an accidental billet occurs, the steel scooping machine 1 can transport the accidental billet to the accidental unloading platform 6, realizing the billet picking function.

[0048] For ease of understanding and description, this invention uses absolute positional relationships for description. Unless otherwise specified, the directional term "above" indicates... Figure 2 The direction above, the directional word "down" indicates Figure 2 The lower side of the middle, the directional word "left" indicates Figure 2 The left side of the direction, the directional word "right" indicates Figure 2 The right-hand direction in the text, the directional word "front" indicates perpendicular to. Figure 2 The direction of the paper and pointing inwards from the paper; the directional word "back" indicates perpendicular to the paper. Figure 2 The direction is towards the outside of the paper. This invention is described from the perspective of a reader or user, but the aforementioned directional terms should not be understood or interpreted as limiting the scope of protection of this invention.

[0049] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this patent should still fall within the scope of this patent. Furthermore, the technical features, technical solutions, and embodiments of the present invention can be freely combined and used together.

Claims

1. A method for unloading multi-flow cast billets, characterized in that, The multi-flow continuous casting billet unloading method employs a multi-flow continuous casting billet unloading system, which includes a cooling bed (4) arranged on the left and right sides and a billet unloading roller group (2). A steel scooping machine (1) is arranged above the billet unloading roller group (2). The billet unloading roller group (2) contains twelve billet unloading rollers (21) arranged at intervals along the left and right direction. Along the right-to-left direction, the twelve billet unloading rollers (21) are, in sequence, the first billet unloading roller (201), the second billet unloading roller (202), the third billet unloading roller (203), and the fourth billet unloading roller (204). The fifth billet discharge roller (205), the sixth billet discharge roller (206), the seventh billet discharge roller (207), the eighth billet discharge roller (208), the ninth billet discharge roller (209), the tenth billet discharge roller (2010), the eleventh billet discharge roller (2011), and the twelfth billet discharge roller (2012) are connected. The conveying direction of the billet discharge roller (21) is front and back. The steel scooping machine (1) can scoop up the billet (7) on three billet discharge rollers (21) at one time and move the billet (7) to the left. The cooling bed (4) can make the billet (7) move to the left. The steel scooping machine (1) includes a transverse frame (101), which extends in the front-to-back direction and can move in the left-to-right direction. Multiple steel scooping lifting frames (102) are provided on the transverse frame (101), and the multiple steel scooping lifting frames (102) are arranged at intervals in the front-to-back direction. Multiple steel-collecting lifting frames (102) can move along the left and right directions with the transverse frame (101), and multiple steel-collecting lifting frames (102) can be raised and lowered synchronously. Each steel-collecting lifting frame (102) is connected to three steel-collecting claws (103), and the three steel-collecting claws (103) are arranged at intervals along the left and right directions. The steel retrieval lifting frame (102) includes a column (104) and a crossbar (105). The crossbar (105) extends in the left and right direction. The lower end of the column (104) is connected and fixed to the middle of the crossbar (105). In the direction from right to left, the three steel retrieval claws (103) are the first steel retrieval claw (1031), the second steel retrieval claw (1032), and the third steel retrieval claw (1033). Along the left and right direction, a stepping steel transfer machine (3) is set between the cooling bed (4) and the billet discharge roller group (2). The stepping steel transfer machine (3) can make the billet (7) move to the left. The steel scooping machine (1) can scoop up the billet (7) on the billet discharge roller group (21) and move it to the stepping steel transfer machine (3). The stepping steel transfer machine (3) can move the billet (7) to the cooling bed (4). The multi-strand continuous casting billet unloading method includes the following steps: Step 1: The first steel claw (1031), the second steel claw (1032), and the third steel claw (1033) correspond one-to-one with the first billet discharge roller (201), the second billet discharge roller (202), and the third billet discharge roller (203) respectively. The steel scooping machine (1) scoops up the billet (7) on the first billet discharge roller (201), the second billet discharge roller (202), and the third billet discharge roller (203) in one go and moves the billet (7) to the left onto the stepping steel transfer machine (3). The steel scooping lifting frame (102) returns to the waiting position. Step 2: The first steel claw (1031), the second steel claw (1032), and the third steel claw (1033) correspond one-to-one with the fourth billet roller (204), the fifth billet roller (205), and the sixth billet roller (206) respectively. The steel scooping machine (1) scoops up the billet (7) on the fourth billet roller (204), the fifth billet roller (205), and the sixth billet roller (206) at one time and moves the billet (7) to the left onto the stepping steel transfer machine (3). The steel scooping lifting frame (102) returns to the waiting position. Step 3: The first steel claw (1031), the second steel claw (1032), and the third steel claw (1033) correspond one-to-one with the seventh billet roller (207), the eighth billet roller (208), and the ninth billet roller (209) respectively. The steel scooping machine (1) scoops up the billet (7) on the seventh billet roller (207), the eighth billet roller (208), and the ninth billet roller (209) at one time and moves the billet (7) to the left onto the stepping steel transfer machine (3). The steel scooping lifting frame (102) returns to the waiting position. Step 4: The first steel claw (1031), the second steel claw (1032), and the third steel claw (1033) correspond one-to-one with the tenth billet roller (2010), the eleventh billet roller (2011), and the twelfth billet roller (2012) respectively. The steel scooping machine (1) scoops up the billet (7) on the tenth billet roller (2010), the eleventh billet roller (2011), and the twelfth billet roller (2012) at one time and moves the billet (7) to the left onto the stepping steel transfer machine (3). The steel scooping lifting frame (102) returns to the waiting position.

2. The method for unloading multi-strand continuous casting billets according to claim 1, characterized in that, The upper part of the first scooping claw (1031) is connected to the right end of the crossbar (105), the upper part of the second scooping claw (1032) is connected to the middle part of the crossbar (105), the upper part of the third scooping claw (1033) is connected to the left end of the crossbar (105), and a diagonal brace (106) connects the column (104) and the crossbar (105).

3. The method for unloading multi-strand continuous casting billets according to claim 1, characterized in that, Along the right-to-left direction, the twelve billet exit roller tracks (21) are, in order, the first billet exit roller track (201), the second billet exit roller track (202), the third billet exit roller track (203), the fourth billet exit roller track (204), the fifth billet exit roller track (205), the sixth billet exit roller track (206), the seventh billet exit roller track (207), the eighth billet exit roller track (208), the ninth billet exit roller track (209), the tenth billet exit roller track (2010), the eleventh billet exit roller track (2011), and the twelfth billet exit roller track (2012).

4. The method for unloading multi-strand continuous casting billets according to claim 1, characterized in that, The multi-flow billet discharge system also includes a billet collection bed (5) and an emergency discharge platform (6). The billet collection bed (5) is located on the left side of the cooling bed (4), and the emergency discharge platform (6) is located on the right side of the billet discharge roller group (2). The billet (7) on the cooling bed (4) can be moved to the billet collection bed (5), and the steel scooping machine (1) can scoop up the billet (7) on the billet discharge roller group (21) and move it to the emergency discharge platform (6).

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