An irregular middle injection pipe and casting structure for the eight-position plate arrangement method

Abstract

The present invention provides a special-shaped middle pouring tube for the eight-position plate arrangement method, comprising: a tube body, with a middle pouring hole provided in the middle of the tube body; a base, which is arranged at the lower end of the tube body and correspondingly placed on a bottom plate to pour molten steel into an ingot mold through the bottom plate; a plurality of pressing blocks are provided on the outer periphery of the base, and the pressing blocks are evenly distributed in the circumferential direction of the base for pressing the brick joints of the DC bricks on the bottom plate. Since the pressing blocks are fixed on the base of the middle pouring tube, during the plate arrangement process of the eight-position plate arrangement, there is no need to additionally add pressing blocks to press the brick joints of the DC bricks, which can reduce the whole mold time and thus increase the output; by using the special-shaped middle pouring tube to press the brick joints, the risk of molten steel leakage can be significantly reduced, the implementation of the eight-position plate arrangement method can be satisfied, and the casting efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of die casting tooling development, and in particular relates to a special-shaped center injection pipe and a casting structure used for an eight-position swing plate method. Background Art

[0002] 3T ingot mold is the most common ingot mold in 70T die casting method. 70T die casting 3T ingot mold is usually arranged in 4 or 3 plates. If 4 plates are arranged, the number of plates from the first to the fourth plate is 6664, and if 3 plates are arranged, the number of plates from the first to the third plate is 886. The six-position plate arrangement method of 3T steel ingot mold refers to placing 6 steel ingot molds on a six-position bottom plate, and the eight-position plate arrangement method of 3T steel ingot mold refers to placing 8 steel ingot molds on an eight-position bottom plate. Both the six-position plate arrangement method and the eight-position plate arrangement method have certain defects and shortcomings. The six-position plate method has fewer swing molds in one plate, and can only cast 6 at most, resulting in low pouring efficiency. When the eight-position plate method is used, the center injection tube is placed in the center of the base plate, and the eight ingot molds are placed at the rising holes of the eight DC tail bricks around the base plate. When using this method to place the plate, there is a very big defect that there are DC brick joints on the four oblique soup channels on the base plate that are not pressed by the bottom of the center injection tube or the ingot mold. During the steel pouring process, steel is likely to escape at the DC brick joints, and even the two adjacent DC bricks at the joints will warp up in the groove of the base plate.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a special-shaped center-filling pipe and an eight-position swing plate casting structure.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A special-shaped center injection tube for an eight-position panning method, comprising:

[0007] A tube body, wherein a central injection hole is provided in the middle of the tube body;

[0008] A base, which is arranged at the lower end of the tube body and is correspondingly placed on the bottom plate, so as to pour molten steel into the ingot mold through the DC bricks on the bottom plate;

[0009] A plurality of pressing blocks are arranged on the outer periphery of the base, and the pressing blocks are evenly distributed in the circumferential direction of the base, and are used for pressing the brick joints of the DC bricks.

[0010] Preferably, a trumpet-shaped guide nozzle corresponding to the center injection hole is provided at the upper end of the tube body.

[0011] Preferably, the outer wall of the tube body is provided with two symmetrically distributed lifting ears.

[0012] Preferably, the base is of a conical structure.

[0013] Preferably, a plurality of pouring tube bricks are sleeved inside the middle pouring hole, and the plurality of pouring tube bricks are sequentially connected along the axial direction of the middle pouring hole.

[0014] Preferably, the tube body and the base are integrally formed castings.

[0015] Preferably, the base is a circular plate body, and there are four pressing blocks in its circumferential direction to press the DC bricks corresponding to the ingot molds at the four corners of the bottom plate.

[0016] A casting structure for the eight-position plate method, comprising:

[0017] A bottom plate having nine workstations distributed in an array thereon. Among them, one workstation located at the center is a center pit workstation for setting a center pit; the remaining eight workstations are placement workstations for placing ingot molds, and brick grooves corresponding to and communicating with each placement workstation are provided in the circumferential direction of the center pit;

[0018] DC bricks, and a plurality of the DC bricks are arranged along the brick grooves to communicate the center pit and the placement workstations;

[0019] Ingot molds, and the ingot molds are correspondingly placed at the placement workstations, and the mold bottom holes of the ingot molds are aligned with the rising holes of the DC bricks at the tails of the brick grooves;

[0020] A special-shaped middle pouring tube, the base of the special-shaped middle pouring tube is placed on the bottom plate, and a plurality of pressing blocks on the circumferential direction of the base correspond to the brick grooves to press the brick joints of the DC bricks between the center pit and the ingot molds.

[0021] Preferably, the base is a circular plate body, and there are four pressing blocks in its circumferential direction to press the DC bricks corresponding to the ingot molds at the four corners of the bottom plate;

[0022] The outer peripheral surface of the base is tangent to the outer walls of the four ingot molds at non-corner positions.

[0023] Preferably, the middle pouring hole and the center pit are concentrically arranged, a plurality of pouring tube bricks are sleeved inside the middle pouring hole, and the plurality of pouring tube bricks are sequentially connected along the axial direction of the middle pouring hole.

[0024] Beneficial effects: Since the briquette is fixed on the bottom base of the tundish, during the process of arranging eight steel ingot molds, there is no need to additionally add a briquette to compress the brick joints of the DC bricks, which can reduce the whole mold time and thus increase the output; by using a special-shaped tundish to compress the brick joints, the risk of molten steel leakage can be significantly reduced, meeting the implementation of the eight-piece arrangement method and improving the casting efficiency; the special-shaped tundish in the present invention can effectively promote the 886-piece arrangement method for 70T ingot casting, thereby reducing the number of pieces arranged per furnace for 70T ingot casting. Reducing the number of pieces arranged per furnace of steel can reduce the consumption of runner bricks. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0026] Figure 1 It is a top view sketch of the special-shaped tundish in the specific embodiment provided by the present invention;

[0027] Figure 2 is Figure 1 a sectional view sketch at A-A;

[0028] Figure 3 It is a top view sketch of the bottom plate in the specific embodiment provided by the present invention;

[0029] Figure 4 It is a structural sketch of the bottom plate with eight ingot molds placed thereon in the specific embodiment provided by the present invention;

[0030] Figure 5 It is a sketch of the placement of ingot molds when eight briquettes are provided on the base in the specific embodiment provided by the present invention.

[0031] In the figures: 1, base; 2, briquette; 3, pipe body; 4, lifting lug; 5, tundish hole; 6, bottom plate; 7, brick groove; 8, central pit; 9, ingot mold. DETAILED DESCRIPTION OF THE INVENTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0033] In the description of the present invention, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "connected" and "coupled" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0035] As Figures 1-5 shown, a special-shaped middle pouring tube for the eight-position plate setting method includes a tube body 3 and a base 1. A middle pouring hole 5 is provided in the middle of the tube body 3 for introducing molten steel into the bottom plate 6 for casting; the base 1 is arranged at the lower end of the tube body 3 and is correspondingly placed on the bottom plate 6 to pour molten steel into the ingot mold 9 through the bottom plate 6; a plurality of pressing blocks 2 are provided on the outer periphery of the base 1, and the pressing blocks 2 are evenly distributed in the circumferential direction of the base 1 for pressing the brick joints of the DC bricks on the bottom plate 6. In this embodiment, since the base 1 and the pressing blocks 2 are connected together, when performing the eight-position plate setting, as long as the special-shaped middle pouring tube is placed facing backward at the center of the bottom plate 6, there is no need to additionally seal the gaps between the DC bricks in the four brick grooves 7, which can reduce the plate setting time. According to the actual production records, using this special-shaped middle pouring tube can reduce the plate setting time by 0.5 h / set, saving about 35 h throughout the year. Calculated based on a plate setting time of 3 h / set, 12 sets of plate settings can be increased throughout the year, and the ingot casting steel output can be increased by about 70 t * 12 = 840 t. If a furnace of steel needs to be cast into 22 pieces, if using a six-position bottom plate 6 for six-position plate setting, 4 plates need to be set (6 ingot molds 9 are set on the first 3 plates using the six-position bottom plate 6, and the remaining 4 ingot molds 9 are set on the 4th plate). If using an eight-position bottom plate 6 for eight-position plate setting, only 3 plates need to be set. 8 pieces are set on the first 2 plates using the eight-position bottom plate 6, and the remaining 6 pieces are set on one more plate. Compared with the six-position plate setting method, 2 more ingot molds 9 can be set on one plate, and the number of plate settings for a furnace of steel changes from 4 plates to 3 plates, thereby reducing the total number of plate settings for a furnace of steel.

[0036] The following is the amount of steel flow bricks that can be saved for a furnace of steel compared with the six-position plate setting method: 15 injection pipe bricks + 1 funnel brick + 1 center brick = 17 steel flow bricks. Calculated based on 70 sets per year, 1190 steel flow bricks can be saved annually.

[0037] In another alternative embodiment, a flared nozzle corresponding to the central pouring hole 5 is provided at the upper end of the pipe body 3, and a funnel brick can be placed at the nozzle. Two symmetrically distributed lifting lugs 4 are provided on the outer wall of the pipe body 3. During use, the pipe body 3 can be moved and hoisted by a crane, reducing the labor intensity of construction workers.

[0038] In another alternative embodiment, a conical connecting transition part is provided between the bottom of the pipe body 3 and the base 1, or the base 1 is of a conical structure, which can effectively enhance the connection strength between the base 1 and the pipe body 3.

[0039] In another alternative embodiment, a plurality of pouring pipe bricks are sleeved inside the central pouring hole 5, and the plurality of pouring pipe bricks are sequentially connected along the axial direction of the central pouring hole 5 to form a diversion channel for guiding molten steel. Among them, the pipe body 3 and the base 1 are integrally formed casting parts.

[0040] In another alternative embodiment, the base 1 is a circular plate body, and there are eight circumferential pressing blocks 2. The eight pressing blocks 2 respectively correspond to each ingot mold 9 to seal the DC brick joints on each brick groove 7. For example: based on a central pouring pipe with a base diameter of 900 mm, eight pressing blocks 2 are provided. During the eight-position layout, after using a special-shaped central pouring pipe with a base diameter of 900 mm for layout, the distance between the central pouring pipe base and the ingot molds 9 placed at the four corners of the bottom plate 6 is 590 mm. The eight protruding pressing blocks 2 at the bottom of the 900 mm special-shaped central pouring pipe have a radial length of 560 mm each, and the distance is increased by 560 mm in the four diagonal runner directions and the four directions of up, down, left, and right at the bottom of the existing central pouring pipe with a bottom diameter of 900 mm. The eight protrusions at the bottom of the 900 mm special-shaped central pouring pipe can well press on the joints of the DC bricks and play a sealing role, reducing the risk of molten steel leakage. Or the length of the pressing blocks 2 corresponding to the four diagonal runner directions is 590 mm, and the length of the remaining four pressing blocks 2 is 560 mm.

[0041] In some embodiments, there are four circumferential pressing blocks 2 on the base 1 to tightly press the DC bricks corresponding to the ingot molds 9 located at the four corners of the bottom plate 6, and the remaining ingot molds 9 are tangent to the outer circumference of the base 1; when the eight-position layout method is used for placing the ingot molds 9, the eight ingot molds 9 are distributed in a rectangular shape around the central pit 8, and the center of the rectangle corresponding to the eight ingot molds 9 coincides with the center of the circle of the central pit 8. At this time, the DC bricks directly between the non-corner ingot molds 9 are longitudinally pressed by the base 1 to achieve sealing.

[0042] For example, in the eight-position layout method of the 3T ingot mold 9, after using the special-shaped tundish with a bottom diameter of 1260 mm for layout, the distance between the bottom of the tundish and the ingot mold 9 placed at the four corners of the bottom plate 6 is 410 mm. The bottom of the special-shaped tundish has four protrusions, which is equivalent to increasing the distance by 360 mm in the four diagonal runner directions of the bottom. This length can well press on the brick joints of the DC bricks to play a sealing role and reduce the risk of steel leakage.

[0043] A casting structure with an eight-position layout, comprising:

[0044] A bottom plate 6, on which there are nine workstations distributed in an array. Among them, one workstation located at the center is the center pit 8 workstation for setting the center pit 8; the remaining eight workstations are placement workstations for placing the ingot mold 9. Brick grooves 7 corresponding to and communicating with each placement workstation are provided in the circumferential direction of the center pit 8;

[0045] DC bricks, and a plurality of the DC bricks are arranged along the brick grooves 7 to communicate the center pit 8 and the placement workstations;

[0046] An ingot mold 9, which is correspondingly placed at the placement workstation, and the bottom hole of the ingot mold 9 is aligned with the upward hole of the DC brick at the tail of the brick groove 7;

[0047] A special-shaped tundish, the bottom 1 of the special-shaped tundish is placed on the bottom plate 6, and a plurality of pressing blocks 2 on the circumference of the bottom 1 correspond to the brick grooves 7 to press the brick joints of the DC bricks between the center pit 8 and the ingot mold 9.

[0048] In another alternative embodiment, the bottom 1 is a circular plate body, and there are four of the pressing blocks 2 on its circumference to press the DC bricks corresponding to the ingot molds 9 at the four corners of the bottom plate 6; the outer peripheral surface of the bottom 1 is almost tangent to the outer walls of the four ingot molds 9 at non-corner positions.

[0049] Specifically, a method for arranging eight ingot molds in a nine-position turntable includes: Step S1, there are nine workstations arranged in an array on the bottom plate 6. Among them, one workstation located at the center is the central pit 8 workstation for setting the central pit 8; the remaining eight workstations are placement workstations for placing the ingot molds 9. There are brick grooves 7 corresponding to and communicating with each placement workstation circumferentially around the central pit 8; Step S2, pouring steel bricks are laid in the central pit 8 and the brick grooves 7. The pouring steel bricks in the brick grooves 7 are direct-flow bricks, and the pouring steel bricks in the central pit 8 are central bricks; Step S3, place the ingot mold 9 on the placement workstation and align the mold bottom hole of the ingot mold 9 with the rising hole of the direct-flow brick at the tail of the brick groove 7; Step S4, place the base 1 of the special-shaped tundish for the eight-position turntable method on the bottom plate 6. Four pressing blocks 2 are evenly distributed circumferentially on the base 1 and extend towards four ingot molds 9 located at the corners to press the brick joints of the direct-flow bricks in the brick groove 7 between the central pit 8 and the ingot molds 9 at the corners. Before arranging the ingot mold 9 and the special-shaped tundish, the central bricks and direct-flow bricks should be laid in the inner part of the bottom plate 6 first, and after laying, it is lifted onto the casting car. There is a central brick in the central pit 8. The tundish hole 5 in the pipe body 3 is concentrically arranged with the central pit 8. A plurality of pouring bricks are sleeved inside the tundish hole 5, and the plurality of pouring bricks are sequentially connected along the axial direction of the tundish hole 5. The pouring bricks are stacked layer by layer vertically above the central brick. The interfaces of the pouring bricks should be tight, aligned section by section, without misalignment or skew. After the pouring bricks are sleeved on the pipe body 3, the pipe body 3 is vertically placed on the bottom plate 6. When pouring steel, the axes of the plurality of pouring bricks coincide. When sleeved into the tundish hole 5, first align and sequentially sleeve one section of the pouring brick, and prevent touching the pouring bricks. After the pipe body is sleeved down, first check and adjust it to the central position, and then adjust the pouring bricks to be vertical without misalignment. A funnel brick is assembled at the trumpet-shaped nozzle at the upper end of the tundish hole 5. Then sand filling is carried out. Before sand filling, 1-2 ingot molds 9 are placed around first, and then the gaps between the pouring bricks and the pipe body 3 are filled with firebrick particles. After all the ingot molds 9 are assembled, firebrick particles are added as appropriate according to the settlement of the firebrick particles in the tundish hole 5.

[0050] In another alternative embodiment, the bottom plate 6 has a square structure, with a central pit 8 provided at its center. A plurality of brick grooves 7 are circumferentially and uniformly distributed around the central pit 8 and communicate with the central pit 8. The brick grooves 7 are suitable for DC bricks with a side length of 100 mm. The central brick (also called the central flow-dividing brick) is arranged in the central pit 8 and has an upper opening provided at its center. The side openings corresponding to the grooves of the bottom plate 6 are correspondingly arranged on the side of the central flow-dividing brick and communicate with the upper opening. The cross-section of the working surface and the non-working surface of the pouring tube brick are both circular, and the wall thickness is uniform. The working surface is the inner cavity, and the non-working surface is the outer wall. During the ingot casting, the inner cavity of the pouring tube brick is used for the flow of molten steel. The cross-sectional shape of the pouring tube brick is annular. The common inner diameter of the pouring tube brick is Φ90 mm, and the outer diameter is Φ150 mm. When the 3T ingot mold 9 is arranged in a tray, 15 pouring tube bricks need to be vertically assembled inside the tube body 3. The DC bricks are arranged in the brick grooves 7 of the bottom plate 6 and have diversion holes provided at the ends. The DC tail bricks also have rising holes provided at their tops, and the diversion holes are correspondingly connected to the side openings. The cross-sectional shape of the DC brick is square, and the cross-sectional width of the DC brick is generally 100 mm. The common lengths of the DC bricks are 150 mm, 250 mm, 300 mm, etc. The funnel brick is a kind of flow steel brick with a flared mouth. The common inner diameter of the small mouth of the funnel brick is Φ90 mm. The fire brick particles are refractory materials filled between the tube body 3 and the pouring tube bricks in the ingot casting process, and the particle size is between 3 - 8 mm.

[0051] In another alternative embodiment, the base 1 is a circular plate body, and there are eight pressing blocks 2 on its circumference. The eight pressing blocks 2 respectively correspond to each ingot mold 9 to seal the DC brick joints on each brick groove 7.

[0052] Alternatively, there are four pressing blocks 2, and the outer peripheral surface of the base 1 is tangent to the outer walls of the four ingot molds 9 at non-corner positions. When the ingot molds 9 are arranged by the eight-position tray method, the eight ingot molds 9 are rectangularly distributed around the central pit 8, and the center of the rectangle corresponding to the eight ingot molds 9 coincides with the center of the circle of the central pit 8. At this time, the DC bricks directly between the non-corner ingot molds 9 are longitudinally pressed by the base 1 to achieve sealing. It can be understood that the above description is only exemplary, and the embodiments of the present application do not limit this.

[0053] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are within the scope of the claims of the present invention pending approval.

Claims

1. A casting structure for the eight-position plate arrangement method, characterized in that, it includes: A bottom plate, on which there are nine workstations arranged in an array. Among them, one workstation located at the center is the central pit workstation for setting the central pit; the remaining eight workstations are placement workstations for placing ingot molds. Brick grooves corresponding to and communicating with each placement workstation are provided in the circumferential direction of the central pit; Direct current bricks, and a plurality of the direct current bricks are arranged along the brick grooves to communicate the central pit and the placement workstations; Ingot molds, and the ingot molds are correspondingly placed at the placement workstations, and the mold bottom holes of the ingot molds are aligned with the rising holes of the direct current bricks at the tails of the brick grooves; Eight ingot molds are distributed in a rectangle around the central pit, and the center of the rectangle corresponding to the eight ingot molds coincides with the center of the circle of the central pit; Special-shaped middle runner pipes, and the special-shaped middle runner pipes include: A pipe body, and a middle runner hole is provided in the middle of the pipe body; A base, and the base is arranged at the lower end of the pipe body and is correspondingly placed on the bottom plate to pour molten steel into the ingot molds through the direct current bricks on the bottom plate; Four pressing blocks are provided on the outer periphery of the base, and the pressing blocks are evenly distributed in the circumferential direction of the base for pressing the brick joints of the direct current bricks between the central pit and the ingot molds at the four corners of the bottom plate; The base is a circular plate body; the outer peripheral surface of the base is tangent to the outer walls of the four ingot molds at non-corner positions to press the direct current bricks corresponding to the four ingot molds at non-corner positions.

2. The casting structure for the eight-position plate arrangement method according to claim 1, characterized in that, A horn-shaped nozzle corresponding to the middle runner hole is provided at the upper end of the pipe body.

3. The casting structure for the eight-position plate arrangement method according to claim 1, characterized in that, Two symmetrically distributed lifting lugs are provided on the outer wall of the pipe body.

4. The casting structure for the eight-position plate arrangement method according to claim 1, characterized in that, The base is a conical structure.

5. The casting structure for the eight-position plate arrangement method according to claim 1, characterized in that, The pipe body and the base are integrally formed casting parts.

6. The casting structure for the eight-position plate arrangement method according to claim 1, characterized in that, The middle runner hole and the central pit are concentrically arranged, and a plurality of runner bricks are sleeved inside the middle runner hole, and the plurality of runner bricks are sequentially connected along the axial direction of the middle runner hole.

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