Air-permeable punching device and method for sintered material layer

Abstract

The invention provides a sintering material layer ventilation punching device and method.The device comprises a round roller and conical teeth evenly arranged on the round roller, the two ends of the round roller are rotationally connected with supports through rotating shafts correspondingly, and the two supports are fixed to the two sides of a trolley channel in front of a sintering machine head correspondingly; the round roller is higher than the trolley, and the length of the round roller is the same as the width of the trolley; tooth holder arrays are evenly arranged in the circumferential direction of the outer wall of the round roller and comprise tooth holders evenly arranged in the length direction of the round roller, the conical teeth are detachably connected to the tooth holders, and the included angle between every two adjacent tooth holder arrays is not larger than 45 degrees. Different conical teeth can be replaced according to production requirements, rotation is not required to be driven by external force, the efficiency of punching air holes is improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering process equipment, and more specifically, to a sintering material layer air permeability punching device and method. Background Art

[0002] The sintering process is an important link in the iron and steel production process. It is a process of mixing various powdered iron-containing raw materials, adding appropriate amounts of fuel and flux, adding an appropriate amount of water, and then making the materials undergo a series of physical and chemical changes on the sintering equipment to bond the ore powder particles into lumps. At present, thick-layer sintering is being promoted in the sintering industry. However, the prerequisite for thick-layer sintering is to improve the air permeability of the sintering material layer. Generally, after the pallet passes through the high-temperature ignition furnace, a hard shell quickly forms on the surface of the material layer, which easily causes poor air permeability of the material layer, large bed resistance (the material layer thickness is constant), high wind box pressure, insufficient air supply, slow vertical sintering speed, and poor roasting reaction.

[0003] Many existing air permeability devices directly weld a certain number of taper teeth on the roller, and use the self-weight of the roller to press the taper teeth onto the surface of the material layer to punch holes. The punching depth is fixed, the taper teeth are not replaceable, and it is easy to stick sundries during use. If a large number of taper teeth are damaged, it is necessary to carry out re-welding treatment during shutdown, which is time-consuming and laborious. Some also require an external power source to drive the roller to rotate, resulting in a high cost. Summary of the Invention

[0004] In view of the above problems, the purpose of the present invention is to provide a sintering material layer air permeability punching device and method, which can replace different taper teeth according to production needs, rotate without external force drive, improve the efficiency of punching air permeability holes, and reduce production costs.

[0005] A sintering material layer air permeability punching device provided by the present invention includes a round roller and taper teeth uniformly arranged on the round roller, wherein,

[0006] Both ends of the round roller are respectively rotationally connected to a bracket through a rotating shaft, and the two brackets are respectively fixed on both sides of the pallet channel in front of the sintering machine head. The round roller is higher than the pallet and has the same length as the width of the pallet;

[0007] A tooth seat arrangement is uniformly provided along the circumferential direction of the outer wall of the round roller. The tooth seat arrangement includes tooth seats uniformly arranged along the length direction of the round roller. The taper teeth are detachably connected to the tooth seats, and the included angle between adjacent tooth seat arrangements is not greater than 45 degrees.

[0008] Among them, an optional solution is that the tooth base includes a fixing plate and a connecting plate welded perpendicular to each other. The bottom edge of the fixing plate is welded on the round roller, and the fixing plate is perpendicular to the central axis of the round roller. The connecting plate is arranged along the radial direction of the round roller. Two through holes are provided in the part of the connecting plate higher than the top end of the fixing plate, and the central connection line of the two through holes is in the same plane as the fixing plate; the bevel gear is installed on the connecting plate through bolts passing through the through holes.

[0009] Among them, an optional solution is that the fixing plate is a right trapezoidal plate, and an arc-shaped opening is cut from the lower half of the straight waist edge of the right trapezoidal plate to the lower end of the inclined waist edge. The upper half of the straight waist edge is welded to the midline of the connecting plate, and the central connection line of the two through holes is arranged on the midline of the connecting plate; the arc-shaped opening is attached to and welded on the outer wall of the round roller.

[0010] Among them, an optional solution is that the bevel gear includes a mounting seat and a wedge-shaped tooth fixed on the upper part of the mounting seat, and mounting holes corresponding to the through holes are provided on the mounting seat.

[0011] Among them, an optional solution is that a slot is opened upward at the center of the bottom of the mounting seat, the mounting holes are arranged on the side walls of the mounting seat on both sides of the slot, the connecting plate is inserted into the slot, the two ends of the through hole are respectively aligned with the corresponding mounting holes, and are connected by bolts and nuts.

[0012] Among them, an optional solution is that the bottom of the mounting seat is close to the upper end of the fixing plate, and the width of the connecting plate is greater than the width of the mounting seat.

[0013] Among them, an optional solution is that the distance between the tooth bases in the tooth base arrangement is 200 mm - 300 mm.

[0014] Among them, an optional solution is that the number of rows of the tooth base arrangement is 8 rows.

[0015] Among them, an optional solution is that the bevel gear inserts into the material layer on the trolley by no more than 200 mm.

[0016] On the other hand, a method for punching air holes in a sintered material layer provided by the present invention uses the above-mentioned sintered material layer air hole punching device to punch holes in the material layer of the trolley, and includes the following steps:

[0017] S1: Fix two brackets on both sides of the trolley channel in front of the sintering machine head respectively, and rotatably connect the two ends of the round roller with the brackets through rotating shafts;

[0018] S2: Connect bevel gears on each tooth base, and insert a row of bevel gears close to the trolley material layer into the trolley material layer;

[0019] S3: The trolley moves forward, driving the tapered teeth to be inserted into the material layer of the trolley row by row.

[0020] As can be seen from the above description, the sintering material layer air-permeability punching device and method provided by the present invention include a round roller and tooth seats uniformly arranged on the round roller. The tapered teeth are detachably connected to the tooth seats, facilitating replacement at any time. The tapered teeth of the present invention can be replaced at any time according to production and usage conditions without stopping the machine. The forward force of the trolley material surface drives the tapered teeth to move forward on the material surface, thereby rotating the round roller, and the tapered teeth punch holes stably in the material layer row by row, improving the punching efficiency, reducing the production cost, and achieving a better combustion and sintering effect. Description of the Drawings

[0021] By referring to the content of the specification in conjunction with the following drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become clearer and easier to understand. In the drawings:

[0022] Figure 1 is a schematic structural diagram of the sintering material layer air-permeability punching device according to Embodiment 1 of the present invention;

[0023] Figure 2 is Figure 1 the A-A cross-sectional view of;

[0024] Figure 3 is a schematic structural diagram of the tapered tooth according to Embodiment 1 of the present invention;

[0025] Figure 4 is the front view of the tapered tooth according to Embodiment 1 of the present invention;

[0026] Figure 5 is a flowchart of the sintering material layer air-permeability punching method according to Embodiment 2 of the present invention;

[0027] Wherein, 1-round roller, 2-rotating shaft, 3-bracket, 4-tapered tooth, 41-mounting seat, 42-wedge-shaped tooth, 43-mounting hole, 44-slot, 5-tooth seat, 51-fixed plate, 52-connecting plate, 53-through hole, 54-arc-shaped opening, 6-bolt, 7-nut, 8-trolley;

[0028] In all the drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Embodiments

[0029] The present invention can be subjected to various changes and can have various embodiments. Specific embodiments are illustrated in the drawings and described. However, the present invention is not limited to this specific embodiment, and all changes, equivalents, and substitutes falling within the spirit and technical scope of the present invention should be understood to be included.

[0030] Ordinal terms such as first, second, etc. may be used to describe various components, but the components are not limited to such terms. These terms are only used to distinguish one component from another. For example, without departing from the scope of the claims of the present invention, the second component may be named the first component, and similarly, the first component may also be named the second component. The term "and / or" includes a combination of multiple recited items that are related or one of the multiple recited items.

[0031] It should be understood that when referring to a component being "connected" or "in contact" with other components, this includes not only the case of being directly connected or in contact with other components, but also should be understood to include the case where there are other components in between. Conversely, when referring to a component being "directly connected" or "directly in contact" with other components, it should be understood that there are no other components in between.

[0032] In the description of the embodiments, when it is described that a certain component is formed "on or under" another component, "on or under" includes both the case where the two components are in direct contact with each other and the case where at least one other component is disposed between the two components. And when expressed as "on" or "under", based on a certain component, it not only refers to the upper side direction, but may also include the lower side direction.

[0033] The terms used in this application are only used to describe specific embodiments and do not limit the present invention. Unless otherwise clearly specified in the context, the singular expression includes the plural expression. In this application, it should be understood that terms such as "comprising" or "having" are used to specify the presence of the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and do not preclude the existence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0034] Unless otherwise defined, including technical terms or scientific terms, all terms used herein have the same meaning as generally understood by those skilled in the art. Terms defined in commonly used dictionaries should be interpreted to have a meaning consistent with the meaning in the context of the relevant technology. If not clearly defined in this application, they cannot be interpreted as ideal or overly formal meanings.

[0035] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0036] Embodiment 1

[0037] As Figures 1 - 4As shown together, the sintering material layer air-permeable punching device proposed in this embodiment can be used to punch holes in the materials in the iron and steel production sintering process in advance before entering the sintering machine to increase the air permeability of the materials during sintering, and can also be used for sintering in other metallurgical processes.

[0038] This sintering material layer air-permeable punching device includes a round roller 1 and conical teeth 4 uniformly arranged on the round roller 1. The two ends of the round roller 1 are respectively rotatably connected to a bracket 3 through a rotating shaft 2, and the two brackets 3 are respectively fixed on both sides of the channel of the trolley 8 in front of the sintering machine head. The round roller 1 straddles above the trolley 8 and is higher than the trolley. The conical teeth 4 can be inserted into the material layer in the trolley 8. As the trolley 8 moves forward, the conical teeth 4 on the round roller 1 are driven to be inserted into the material layer one by one and move forward, pressing out holes for air permeability during sintering in the material layer. Subsequently, the trolley 8 enters the sintering machine. The round roller 1 can be made of 45# steel pipe. The round roller 1 rotates relying on the driving force of the materials when the trolley 8 moves, without external force assistance. In order to punch holes comprehensively in the width direction of the material surface, the length of the round roller 1 can be the same as the width of the trolley 8. The conical teeth 4 are uniformly arranged in the width direction of the material surface of the trolley 8, which can ensure that the number of punched holes meets the requirements.

[0039] The arrangement of the conical teeth 4 on the round roller 1 can be that a row of tooth seats is uniformly arranged along the circumferential direction of the outer wall of the round roller 1. The row of tooth seats includes tooth seats 5 uniformly arranged along the length direction of the round roller 1. The conical teeth 4 are detachably connected to the tooth seats 5. If the conical teeth 4 are sticky with sundries or damaged during use, the speed of the trolley 8 can be slowed down, the conical teeth 4 can be appropriately cooled, and the conical teeth 4 can be quickly replaced without stopping the sintering machine, without affecting production and punching. Different specifications of conical teeth 4 can also be made according to the production situation, which is convenient to replace the conical teeth 4 according to the situation of the material layer, and the punching effect is better.

[0040] The number of tooth seats 5 in each row of tooth seat arrangement is determined according to the width of the trolley 8. The spacing between the tooth seats 5 should be appropriate, and the spacing can be 200mm - 300mm to ensure the number of air-permeable holes.

[0041] The diameter of the round roller 1 and the number of rows of tooth seat arrangement can be determined according to the production situation. The included angle between adjacent rows of tooth seats is not more than 45 degrees. It is necessary to ensure that after installing the conical teeth 4, the conical teeth 4 in the previous row are inserted into the material layer and move forward stably following the trolley 8 and punch holes. Before the conical teeth 4 in the previous row leave the material surface, the adjacent conical teeth 4 in the next row can be inserted into the material surface, and the conical teeth 4 punch holes row by row. In this embodiment, 8 rows of tooth seat arrangement can be adopted.

[0042] The shape and length of the conical teeth 4 should ensure that the punching depth and width of the conical teeth 4 on the material surface meet the requirements of air permeability. In this embodiment, the length of the conical teeth 4 can be about 440mm, and the maximum length of the conical teeth 4 inserted into the material layer can be 200mm.

[0043] In a specific embodiment of the present invention, the tooth base 5 may include a fixing plate 51 and a connecting plate 52 which are perpendicularly welded to each other. Both the fixing plate 51 and the connecting plate 52 can be made of 45# steel plates with a thickness of about 6 mm. The fixing plate 51 is used for welding with the round roller 1. The connecting plate 52 and one end of the fixing plate 51 are flush, and the other end of the connecting plate 52 is higher than the fixing plate 51 for detachably connecting the bevel gear 4.

[0044] The bottom edge of the fixing plate 51 is welded to the round roller 1, and the fixing plate 51 is perpendicular to the central axis of the round roller 1. The connecting plate 52 is along the radial direction of the round roller 1. Two through holes 53 are provided in the part of the connecting plate 52 where the top end is higher than the fixing plate 51. The central connection line of the two through holes 53 is in the same plane as the fixing plate 51. The connecting plate 52 diverges uniformly around the round roller 1. After the bevel gear 4 is installed on the connecting plate 52, it diverges uniformly on the outer periphery of the round roller 1, and can stably and uniformly punch holes on the material surface.

[0045] The bevel gear 4 is installed on the connecting plate 52 through bolts 6 passing through the two through holes 53. The two sets of bolt and nut connections can connect the bevel gear 4 more stably.

[0046] In a specific embodiment of the present invention, in order to stably connect the tooth base 5 with the round roller 1, the fixing plate 51 can be a right trapezoidal plate. An arc-shaped opening 54 is cut from the lower half of the straight waist side of the right trapezoidal plate to the lower end of the inclined waist side. The upper half of the straight waist side is welded to the midline of the connecting plate 52. The central connection line of the two through holes 53 is set on the midline of the connecting plate 52. The arc-shaped opening 54 is attached and welded to the outer wall of the round roller 1.

[0047] The lower end of the fixing plate 51 is tightly attached and welded to the outer wall of the round roller 1 through the arc-shaped opening 54. The welding is firm and not easy to crack. While the connecting plate 52 is welded to the fixing plate 51, the bottom end of the connecting plate 52 contacts and is welded to the round roller 1, enhancing the firmness of the connecting plate 52.

[0048] In a specific embodiment of the present invention, in order to punch holes efficiently, the bevel gear 4 may include a mounting seat 41 and a wedge-shaped tooth 42 fixed to the upper part of the mounting seat 41. Mounting holes 43 corresponding to the through holes 53 are provided on the mounting seat 41. The mounting seat 41 is connected and fixed to the connecting plate 52 through bolts 6 and nuts 7.

[0049] The wedge-shaped tooth 42 can be made of heat-resistant chromium alloy steel. The wedge-shaped structure teeth have good balance and strength distribution, can effectively bear external loads and transfer them to the rotating shaft 2. The wedge-shaped structure teeth perform excellently in resisting pressure, bending and shear forces and have stronger penetration power. The shape and size of the wedge-shaped tooth 42 can be selected according to the specific situation of the material surface, so that it can easily penetrate into the sintered material layer and move along with the material surface, thereby improving the air permeability of the material layer.

[0050] In a specific embodiment of the present invention, a slot 44 is opened upward in the center of the bottom of the mounting base 41, and the mounting holes 43 are arranged on the side walls of the mounting base 41 on both sides of the slot 44. The connecting plate 52 is inserted into the slot 44. The two ends of each through hole 53 are respectively aligned with the corresponding mounting holes 43, and are connected by bolts 6 and nuts 7.

[0051] The upper and lower mounting holes 43 correspond one by one to the two through holes 53 on the connecting plate 52. The connecting plate 52 is clamped between the mounting bases 41 and is fastened by two sets of bolts and nuts, so the installation is stable and will not be skewed during the drilling process.

[0052] In a specific embodiment of the present invention, in order to make the installation of the bevel gear 4 more stable, after the mounting base 41 is installed, the bottom of the mounting base 41 is close to the upper end of the fixing plate 51, which can further limit the bevel gear 4 and ensure that it will not be skewed during the drilling process. The width of the connecting plate 52 is greater than the width of the mounting base 41. The slot 44 is a three-sided open slot. After the connecting plate 52 is inserted into the slot 44, the two side edges extend out of the slot 44, making the connection more stable.

[0053] In a specific embodiment of the present invention, a bearing is provided between the rotating shaft 2 and the bracket 3, which is beneficial to the smooth rotation of the rotating shaft 2.

[0054] The sintered material layer air-permeable punching device of the present invention can mechanically penetrate the surface hard shell with different material layer thicknesses, leaving holes with a width of about 10 mm - 50 mm and a depth of about 10 mm - 100 mm on the surface of the material layer, destroying the sintered material surface crust, thereby improving the air permeability of the material layer, being beneficial to the negative pressure control of the sintered material surface. At the same time, because the holes are evenly distributed on the material surface, the local internal stress on the material layer surface is greatly reduced, and the problem of material surface cracking is largely solved, making the sintering exhaust air flow more evenly distributed and improving the sintering yield.

[0055] Embodiment 2

[0056] Figure 5 It is a flowchart of the sintered material layer air-permeable punching method according to Embodiment 2 of the present invention;

[0057] As Figure 5 shown, the sintered material layer air-permeable punching method proposed in this embodiment uses the sintered material layer air-permeable punching device described in Embodiment 1 to punch the material layer of the trolley, and includes the following steps:

[0058] S1: Fix the two brackets 3 on both sides of the trolley 8 channel in front of the sintering machine head respectively, and rotatably connect the two ends of the round roller 1 with the brackets 3 through the rotating shafts 2 respectively.

[0059] Before the sintering process begins, firmly fix two brackets 3 on both sides of the channel of the trolley 8 in front of the sintering machine head. The distances between the two brackets 3 and the sintering machine head are the same, and the distance can be determined according to the production situation. Both ends of the round roller 1 can rotate on the brackets 3 along the site. The round roller 1 straddles above the trolley 8 and is higher than the trolley so that the bevel gear 4 can be forcefully inserted into the material surface.

[0060] S2: Connect the bevel gear 4 to each tooth seat 5 and insert a row of bevel gears 4 adjacent to the material layer of the trolley into the material layer of the trolley.

[0061] After installing the round roller 1, select bevel gears of appropriate specifications and install them on each tooth seat 5 according to the height of the material layer of the trolley and the condition of the material. In order to drive the bevel gear to move forward and punch holes when the trolley starts to move, manually insert a row of bevel gears 4 adjacent to the material layer of the trolley into the material layer of the trolley so that the subsequent bevel gears 4 can be smoothly inserted into the material surface.

[0062] S3: The trolley 8 moves forward, driving the bevel gears 4 to be inserted into the material layer of the trolley row by row.

[0063] As the trolley 8 moves forward, it drives the bevel gears 4 on the round roller 1 to be inserted into the material layer row by row and move forward, pressing holes in the material layer. Subsequently, the trolley 8 enters the sintering machine, and the air permeability during the sintering of the material layer is improved.

[0064] The sintering material layer air permeability punching device and method according to the present invention are described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the above-mentioned sintering material layer air permeability punching device and method of the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the appended claims.

Claims

1. A sintering material layer permeability punching device, characterized in that: It includes a round roller and bevel teeth evenly arranged on the round roller, wherein: The two ends of the round roller are rotatably connected to the brackets through rotating shafts, and the two brackets are respectively fixed on both sides of the trolley channel in front of the sintering machine head. The round roller is higher than the trolley and its length is the same as the width of the trolley. A tooth seat arrangement is evenly arranged along the circumference of the outer wall of the round roller. The tooth seat arrangement includes tooth seats evenly arranged along the length direction of the round roller. The bevel teeth are detachably connected to the tooth seats, and the angle between adjacent tooth seat arrangements is no more than 45 degrees.

2. The sintering material layer permeability punching device according to claim 1, characterized in that: The gear holder comprises a fixing plate and a connecting plate which are welded perpendicularly to each other, the bottom edge of the fixing plate is welded to the round roller, and the fixing plate is perpendicular to the central axis of the round roller, the connecting plate is arranged along the radial direction of the round roller, and two through holes are arranged at a portion of the connecting plate which is higher than the top of the fixing plate, and the center line of the two through holes is in the same plane as the fixing plate; The bevel gear is mounted on the connecting plate by bolts passing through the through holes.

3. The sintering material layer permeability punching device according to claim 2, characterized in that: The fixing plate is a right-angled trapezoidal plate, and an arc-shaped opening is cut from the lower half of the straight waist side of the right-angled trapezoidal plate to the lower end of the oblique waist side, the upper half of the straight waist side is welded to the center line of the connecting plate, and the center line of the two through holes is set on the center line of the connecting plate; The arc-shaped opening is attached to and welded on the outer wall of the round roller.

4. The sintering material layer permeability punching device according to claim 2, characterized in that: The bevel gear comprises a mounting seat and a wedge-shaped tooth fixed on the upper part of the mounting seat, and a mounting hole corresponding to the through hole is arranged on the mounting seat.

5. The sintering material layer permeability punching device according to claim 4, characterized in that: A slot is opened upward at the center of the bottom of the mounting seat, the mounting holes are arranged on the side walls of the mounting seat on both sides of the slot, the connecting plate is inserted in the slot, the two ends of the through hole are respectively aligned with the corresponding mounting holes and connected by bolts and nuts.

6. The sintering material layer permeability punching device according to claim 2, characterized in that: The bottom of the mounting seat is close to the upper end of the fixing plate, and the width of the connecting plate is greater than the width of the mounting seat.

7. The sintering material layer permeability punching device according to claim 1, characterized in that: The spacing between the tooth seats in the tooth seat arrangement is 200mm-300mm.

8. The sintering material layer permeability punching device according to claim 1, characterized in that: The number of rows in which the gear seats are arranged is 8.

9. The sintering material layer permeability punching device according to claim 1, characterized in that: The bevel teeth are inserted into the material layer on the trolley by no more than 200 mm.

10. A method for permeating and punching holes in a sintered material layer, characterized in that: The sintering material layer permeable punching device according to any one of claims 1 to 9 is used to punch holes in the trolley material layer, comprising the following steps: S1: fix two brackets on both sides of the trolley channel in front of the sintering machine head, and connect the two ends of the round roller to the brackets through the rotating shaft; S2: Connecting bevel gears to each gear seat, and inserting a row of bevel gears adjacent to the trolley material layer into the trolley material layer; S3: The trolley moves forward, driving the bevel teeth to be inserted into the material layer of the trolley row by row.

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