Intensive round hole hot blast stove grate positioning sand core

Abstract

The utility model relates to an intensive round hole hot blast stove grate positioning sand core which comprises a core head, the core head comprises a top head and a cylindrical core rod which are of an integrated structure, the core head is a single core head or a multi-connected core head, the bottom end of the cylindrical core rod is a cone, a positioning core is movably installed on a cylinder of the cylindrical core rod, and the positioning core is a single positioning core or a multi-connected positioning core. The positioning core and the ejector head are both of a regular hexagonal prism structure. The multi-connection core head is of a linear type one-piece core head structure formed by mutually connecting the side surfaces of the top heads among a plurality of core heads. The multi-connection positioning core is of a linear type integrated positioning core structure formed by connecting the side surfaces of a plurality of positioning cores. And the number of the core heads of the multi-connected core heads is consistent with that of the positioning cores of the multi-connected positioning cores. And the top head, the cylindrical core rod and the positioning core are coaxially arranged. Adjacent positioning sand cores are attached and positioned through the outer surfaces of the regular hexagonal prisms. The pouring of the sand core is controlled, the error accumulation of core setting operation is reduced, and the core making and setting operation precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, and particularly relates to a positioning core for a grate of a dense round-hole hot blast stove. Background Art

[0002] The grate of the hot blast stove is the main casting of the grate support system of the hot blast stove of the iron-making blast furnace, and is used to carry the checker brick regenerator on its upper part. Most of the checker brick regenerators adopt seven-hole checker bricks with dense round holes, and the circular ventilation holes are arranged in an equilateral triangle. Each circular ventilation hole directly or indirectly corresponds to the ventilation hole of the hot blast stove grate through a diverter plate.

[0003] Patent CN102527944B discloses a design method for a sand core of a rhombic grid hole hot blast grate, which is composed of a plurality of sand core units. Each sand core unit includes a lower core head, an upper core head, and a sand core body. The size and shape of the lower core head correspond to the size and shape of the conical hole core of the porous core positioning general template used for corresponding molding; the shape and number of the ventilation holes of the grate are determined according to the shape and number of the ventilation holes of the designed grate, and are rhombic ventilation hole cores composed of two equilateral triangles; the lower core head is a conical core head, and the sand core body is a whole rhombic sand core composed of two equilateral triangles; lower core heads are respectively arranged at the centroid positions of the two equilateral triangles corresponding to the rhombic sand core; a plurality of rhombic sand cores are connected together to form a sand core of a hot blast stove grate with multiple rows of rhombic grid holes; the sand core body is respectively positioned by cooperating with a rhombic upper core head and a conical lower core head. The center line of the wall thickness is used as the dividing line of the combined rhombic upper core head between the rhombic ventilation holes, and a small clearance fit is adopted between the upper core heads to ensure the sand core spacing and the sand core perpendicularity. In the production application process of this design, the phenomenon that the grate holes are not perpendicular to the upper and lower planes of the grate often occurs, that is, the grate holes cannot be guaranteed to be parallel to each other, because in the production process of this structure, it is impossible to ensure that the bottom core head is completely perpendicular to the bottom sand mold during manual core setting. Therefore, there is a non-perpendicular phenomenon between the grate holes, and in the use of the hot blast grate in the blast furnace after production, an efficient ventilation rate cannot be guaranteed. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a positioning core for a grate of a dense round-hole hot blast stove, so as to solve the problem of inaccurate positioning of the upper and lower parts of the core.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A positioning core for a grate of a dense round-hole hot blast stove includes a core head. The core head includes a top head and a cylindrical core rod of an integral structure. The core head is a single core head or a multi-core head. The bottom end of the cylindrical core rod is a cone. A positioning core is movably installed on the column body of the cylindrical core rod. The positioning core is a single positioning core or a multi-core positioning core. Both the positioning core and the top head are regular hexagonal prism structures.

[0007] The multi-connected core head mentioned above is a linear connected core head structure formed by connecting the side surfaces of multiple core heads to each other.

[0008] The above-mentioned top head, cylindrical core rod and positioning core are all coaxially arranged.

[0009] The positioning core is provided with an inner hole for sleeving the cylindrical core rod, and the inner hole and the surface of the cylindrical core rod are in clearance fit.

[0010] The multi-connected positioning core is a linear connected positioning core structure formed by connecting the side surfaces of multiple positioning cores to each other.

[0011] The number of core heads of the multi-connected core head is the same as the number of positioning cores of the multi-connected positioning core.

[0012] Compared with the existing technology, the beneficial effects of the present utility model are as follows:

[0013] Adjacent positioning cores are positioned by fitting the outer surfaces of regular hexagonal prisms. The tipping of the cores is controlled, the error accumulation in the core setting operation is reduced, and the precision and efficiency of the core making and core setting operations are improved. After the connected cores are arranged and combined, positioning is carried out simultaneously through the upper core head and the lower core head to ensure that the distance between the inner holes of the hot air grates is within the tolerance range. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural view of a single positioning core.

[0015] Figure 2 It is a schematic structural view of a triple-connected positioning core.

[0016] Figure 3 For Figure 2 It is a side view.

[0017] Figure 4 For Figure 3 It is a bottom view of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is more than two.

[0020] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0021] Such as Figures 1-4 , a positioning core sand for a grate of a high-density round-hole hot blast stove, includes a core head 1. The core head 1 includes a top head 11 and a cylindrical core rod 12 of an integral structure. The core head 1 is a single core head or a multi-connected core head. The bottom end of the cylindrical core rod 12 is a cone. A positioning core 2 is movably installed on the column body of the cylindrical core rod 12. The positioning core 2 is a single positioning core or a multi-connected positioning core. Both the positioning core 2 and the top head 11 are regular hexagonal prism structures.

[0022] The multi-connected core head is a linear connected core head structure formed by connecting the side surfaces of multiple core heads 1 with each other through the top head 11.

[0023] The top head 11, the cylindrical core rod 12, and the positioning core 2 are all coaxially arranged.

[0024] The positioning core 2 is provided with an inner hole for sleeving the cylindrical core rod 12, and the inner hole and the surface of the cylindrical core rod 12 are in clearance fit.

[0025] The multi-connected positioning core is a linear connected positioning core structure formed by connecting the side surfaces of multiple positioning cores 2 with each other.

[0026] The number of core heads 1 of the multi-connected core head is the same as the number of positioning cores 2 of the multi-connected positioning core.

[0027] A method for manufacturing a grate of a dense round-hole hot blast stove using a positioning core sand for the grate of the hot blast stove, the specific steps including:

[0028] 1) Casting a single core head, a multi-connected core head and corresponding single positioning cores and multi-connected positioning cores;

[0029] 2) Painting the core head 1 and the positioning core 2 manufactured in step 1) with a coating and drying;

[0030] 3) Sleeving the positioning cores 2 on the cylindrical core rod 12 of the core head 1 according to the number of positioning cores to form a positioning core sand;

[0031] 4) Inserting the bottom end of the cylindrical core rod 12 of the installed positioning core sand into the corresponding sinking groove of the grate bottom sand mold of the hot blast stove, and closely arranging the top head of the regular hexagonal prism of the core head 1 and the regular hexagonal prism-shaped positioning cores 2; making the adjacent regular hexagonal prism-shaped positioning cores 2 immovable, and ensuring that the cylindrical core rod 12 of the core head 1 is perpendicular to the grate bottom sand mold of the hot blast stove;

[0032] 5) Fixing the arranged core heads and positioning cores, then closing the mold and pouring.

[0033] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept scope of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all belong to the protection scope of the present invention. In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the present invention does not separately describe various possible combination methods. In addition, any combination can be made between various different embodiments of the present invention as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

[0034] To make the purpose, technical solutions and technical effects of the present invention clearer, the technical solutions in the embodiments of the present invention are now described clearly and completely. However, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Combining the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0035] Embodiment

[0036] A positioning core sand for a grate of a dense round-hole hot blast stove, including a core head 1, the core head 1 includes a top head 11 and a cylindrical core rod 12 of an integral structure, and the core head 1 is a single core head, a double-connected core head and a triple-connected core head;

[0037] The double-core head is a linear connected-core head structure formed by connecting the side surfaces of two core heads 1 to each other between the two core heads 1.

[0038] The triple-core head is a linear connected-core head structure formed by connecting the side surfaces of three core heads 1 to each other between the three core heads 1.

[0039] The bottom end of the cylindrical core rod 12 is a cone. A positioning core 2 is movably installed on the column body of the cylindrical core rod 12. An inner hole for sleeving the cylindrical core rod 12 is provided on the positioning core 2, and the inner hole and the surface of the cylindrical core rod 12 are in clearance fit. Both the positioning core 2 and the top head 11 are regular hexagonal prism structures.

[0040] The positioning core 2 is a single positioning core, a double positioning core and a triple positioning core;

[0041] The double positioning core is a linear connected positioning core structure formed by connecting the side surfaces of two positioning cores 2 to each other.

[0042] The triple positioning core is a linear connected positioning core structure formed by connecting the side surfaces of three positioning cores 2 to each other.

[0043] The top head 11, the cylindrical core rod 12 and the positioning core 2 are all coaxially arranged.

[0044] A method for manufacturing a grate positioning core of a dense round-hole hot blast stove to make a grate of a hot blast stove, the specific steps include:

[0045] 1) Cast single, double and triple core heads and corresponding single, double and triple positioning cores;

[0046] 2) Apply a coating to the core head 1 and the positioning core 2 manufactured in step 1) and dry it;

[0047] 3) Sleeving positioning cores 2 of various specifications on the cylindrical core rods 12 of the core heads 1 correspondingly to form single, double and triple positioning cores;

[0048] 4) Arrange the installed single, double and triple positioning cores on the bottom sand mold of the hot blast stove grate. The bottom end of the cylindrical core rod 12 is inserted into the corresponding sinking groove of the bottom sand mold of the hot blast stove grate. The top head of the regular hexagonal prism of the core head 1 and the regular hexagonal prism positioning core 2 are closely arranged depending on the hexagonal contour; making the adjacent regular hexagonal prism positioning cores 2 immovable, ensuring that the cylindrical core rod 12 of the core head 1 is perpendicular to the bottom sand mold of the hot blast stove grate;

[0049] 5) Fix the arranged core heads and positioning cores, then close the mold and carry out casting.

[0050] The inner holes of the formed hot blast stove grate are parallel to each other. After machining the upper and lower surfaces to the required dimensions, the perpendicularity between the inner holes of the hot blast stove grate and the upper and lower surfaces of the grate is less than 1 mm.

[0051] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and basic spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A compact round-hole hot blast furnace grate positioning sand core, comprising a core head, the core head comprising a top head and a cylindrical core rod of an integrated structure, the core head being a single core head or a multi-connected core head, characterized in that: The bottom end of the cylindrical core rod is a cone, and a positioning core is movably installed on the column of the cylindrical core rod. The positioning core is a single positioning core or a multi-position positioning core, and the positioning core and the top are both regular hexagonal prism structures.

2. The intensive round hole hot blast furnace grate positioning sand core according to claim 1, characterized in that: The multi-connected core head is a linear connected core head structure formed by connecting a plurality of core heads to each other via the side surfaces of the top heads.

3. The intensive round hole hot blast furnace grate positioning sand core according to claim 1, characterized in that: The mandrel, cylindrical core rod and positioning core are all coaxially arranged.

4. The intensive round hole hot blast furnace grate positioning sand core according to claim 1, characterized in that: The positioning core is provided with an inner hole for sleeve-mounting the cylindrical core rod, and the inner hole and the surface of the cylindrical core rod are clearance-matched.

5. The intensive round hole hot blast furnace grate positioning sand core according to claim 1, characterized in that: The multi-joint positioning core is a linear connected positioning core structure formed by connecting a plurality of positioning cores with each other through side surfaces.

6. The intensive round hole hot blast furnace grate positioning sand core according to claim 1, characterized in that: The number of core heads of the multi-connected core heads is consistent with the number of positioning cores of the multi-connected positioning cores.

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