Stacked thin-wall sagger

Abstract

The utility model discloses a stacked thin-wall sagger, and relates to a high-temperature-resistant container in the field of heat treatment. The utility model comprises a bottom plate made of a carbon / carbon composite material, four vertical plates and connecting pieces, the peripheral side of the bottom plate and the inner side wall of each vertical plate are limited through a concave-convex structure; the connecting piece is an inner wrap angle connecting piece or an outer wrap angle connecting piece. Modularized structural design is achieved, and machining, assembling and disassembling are convenient and fast. Standardized accessories can be stored in batches, the production cycle is short, delivery is fast, and the customization requirements of customers for different specifications can be met; the material is changed into a carbon / carbon composite material from graphite, and the strength and the service life are remarkably improved compared with graphite; the wall thickness is optimized and thinned, so that the capacity of the inner cavity is obviously increased, the self weight can be obviously reduced, and the furnace is more convenient to disassemble and assemble; the design of the vent holes facilitates uniform conduction of heat and improves the material sintering quality; and the saggar is convenient to transport during transfer operation due to the supporting strip structure.

Description

Technical Field

[0001] The utility model belongs to a high-temperature resistant container in the field of heat treatment, in particular to a stacked thin-walled sagger. Background Art

[0002] Saggers are widely used in high-temperature heat treatment furnaces and are used as carriers or containers for powder metallurgy, metal materials, ceramic materials, negative electrode materials, magnetic materials, and cemented carbide. They are generally made of graphite and have good corrosion resistance, thermal conductivity, high temperature resistance, and good mechanical properties.

[0003] At present, the existing technology has the following shortcomings: (1) Some companies in the industry use mechanical processing to mill the whole piece of graphite raw material into a hollow sagger structure. The material utilization rate of this method is extremely low; (2) Another part of the company uses a mold to press the graphite powder into a whole sagger. Although this method saves materials, the high mold fee is not cost-effective for a variety of small batches of saggers; (3) The integral graphite sagger has very low strength and high brittleness. It is easy to break during transportation or unloading. It has a short service life and is not cost-effective. Once cracks or impurities are found inside, the entire product will be scrapped and cannot be repaired; (4) There are also a small number of companies that use mortise and tenon structure graphite blocks to splice saggers, but The performance, wall thickness and overall weight of the material are not optimized, and the relative lifespan may be lower than that of the integral structure; (5) The wall thickness of the existing sagger is 15-20mm, which hinders the conduction and contact between the high-temperature gas and the material, resulting in a fast heating rate of the material near the sagger wall during sintering, and a slow heating rate of the material near the center of the sagger, which makes the material in the center of the sagger insufficiently sintered and reduces the overall quality of the product; (6) The saggers in the hot field are mostly stacked for use, but the existing saggers are not easy to align when stacked, and manual alignment wastes work time; (7) The sagger does not have a suitable clamping point, and is easily bumped or dropped and damaged during transfer operations and transportation; Therefore, in response to the above problems, this technical solution proposes a stacked thin-walled sagger. Utility Model Content

[0004] The utility model provides a stacked thin-walled sagger, which comprises a bottom plate, four upright plates vertically arranged around the circumference of the bottom plate, and connecting pieces for fixing the corners of two adjacent upright plates by bolts. The utility model adopts modular design and fully considers the utilization rate of materials. Under the premise of ensuring uncompromising strength, the thickness of the material is further compressed, the material loading capacity is increased, the heat conductivity is improved, efficient and safe operation is guaranteed, and rapid mass production of saggers is realized.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model discloses a stacked thin-walled sagger, which adopts a sagger structure composed of a bottom plate, four vertical plates arranged around the bottom plate, and a connector for fixing the corners of two adjacent vertical plates with bolts.

[0007] The periphery of the bottom plate and the inner side walls of each vertical plate are limited by a concave-convex structure;

[0008] The connecting piece adopts an inner corner connecting piece or an outer corner connecting piece, and is connected between the connecting piece and the vertical plate through bolts.

[0009] Furthermore, the concave-convex structure adopts a mortise and tenon arranged transversely at the bottom of the vertical plate and a four-sided stepped tenon arranged on the outer peripheral side of the bottom plate, or adopts a convex strip-shaped tenon arranged transversely at the bottom of the vertical plate and a groove-shaped tenon arranged on the four sides of the outer peripheral side of the bottom plate; the mortise and tenon are locked and limited.

[0010] Furthermore, the inner corner connector is in the shape of a column with a right-angled triangle cross-section, and the outer walls of the right-angled sides of the inner corner connector are respectively fitted with the right-angled inner walls formed by the two adjacent vertical plates, and are connected to the inner corner connector by bolts passing through the holes opened on the two adjacent vertical plates.

[0011] Furthermore, the outer corner connector is in an L-shaped column, and the inner side walls of the right-angled sides of the outer corner connector are respectively fitted with the right-angled outer walls formed by the two adjacent vertical plates, and are connected to the outer corner connector by bolts passing through the holes opened on the two adjacent vertical plates.

[0012] Furthermore, a first air vent is provided on the surface of the bottom plate.

[0013] Furthermore, a second air vent is provided on the surface of the vertical plate.

[0014] Furthermore, a support bar is laterally provided on the outer side of the vertical plate; the support bar is integral with the vertical plate or fixedly connected with the vertical plate by bolts.

[0015] Furthermore, an alignment limiting structure is provided between two adjacent vertical plates; the alignment limiting structure includes a limiting groove provided on the side of at least one of the two adjacent vertical plates, so that the side walls of the two adjacent vertical plates remain flush.

[0016] Furthermore, the bottom plate, vertical plate and connecting parts are all made of carbon / carbon composite materials; the wall thickness of the bottom plate and vertical plate is 3-6mm

[0017] Furthermore, the upper end of the connecting member is higher than the top surface of the vertical plate, and a gap is provided between the lower end of the connecting member and the bottom end surface of the vertical plate, so that the saggers can be quickly aligned when stacked and are not easily misplaced during transportation.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) A sagger structure is adopted, which is composed of a bottom plate, four vertical plates, and connectors of inner corner connectors or outer corner connectors. The periphery of the bottom plate and the inner side walls of each vertical plate are limited by a concave-convex structure; a modular structural design is realized, and processing, assembly and disassembly are convenient and fast;

[0020] (2) Standardized accessories can be stored in batches, with short production cycles and fast delivery, and can meet customers' customized needs of different specifications;

[0021] (3) The material has been changed from graphite to carbon / carbon composite material, and the strength and life are significantly improved compared to graphite, at least more than 2 times;

[0022] (4) In terms of structure, with the same overall dimensions, the inner cavity capacity can be increased by 25% and the weight can be reduced by 60% due to the optimization of the wall thickness from the traditional 15-20 mm to the current 3-6 mm;

[0023] (5) Since the density of carbon / carbon composite materials is lower than that of graphite, and the wall thickness is thinner, it is lighter and more convenient to disassemble and assemble the furnace;

[0024] (6) The ventilation holes on the bottom plate and / or vertical plate facilitate uniform heat conduction and improve the sintering quality of the material;

[0025] (7) In terms of stacking structure design, the upper end of the outer corner is higher than the top surface of the vertical board and its lower end is higher than the bottom surface of the vertical board, and the upper part of the inner corner is higher than the top surface of the vertical board and the bottom surface of the bottom plate is higher than the bottom surface of the vertical board, which facilitates the quick alignment of the saggers when stacking and is not easy to be misplaced during transportation.

[0026] (8) The support bar structure facilitates the transportation of saggers during transfer operations, ensuring safety and improving transportation efficiency.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a structural schematic diagram of a stacked thin-walled sagger according to a specific embodiment 1 of the present invention;

[0030] Figure 2 for Figure 1 Schematic diagram of the structure after removing one side of the vertical plate;

[0031] Figure 3 For two Figure 1 Schematic diagram of the structure after the saggers are stacked;

[0032] Figure 4 for Figure 1 Structural diagram from perspective A;

[0033] Figure 5 for Figure 2 A partial enlarged view of position B in the middle;

[0034] Figure 6 for Figure 4 A partial enlarged view of the middle C position;

[0035] Figure 7 This is a schematic structural diagram of a stacked thin-walled sagger according to a specific embodiment 2 of the present invention;

[0036] Figure 8 for Figure 7 The structural diagram after removing one side of the vertical plate and the connecting parts;

[0037] Figure 9 For two Figure 7 Schematic diagram of the structure after the saggers are stacked;

[0038] Figure 10 This is a structural schematic diagram of a stacked thin-walled sagger according to a specific embodiment 3 of the present utility model;

[0039] Figure 11 for Figure 10 The structural diagram after removing one side of the vertical plate and the connecting parts;

[0040] Figure 12 For two Figure 10 Schematic diagram of the structure after the saggers are stacked;

[0041] Figure 13 for Figure 10 Schematic diagram of the structure from a medium-D perspective;

[0042] Figure 14 for Figure 12 A partial enlarged view of position E in the middle;

[0043] Figure 15 for Figure 13 A partial enlarged view of the F position in the middle;

[0044] Figure 16 This is a structural schematic diagram of a stacked thin-walled sagger according to a specific embodiment 4 of the present utility model;

[0045] Figure 17 for Figure 16 The structural diagram after removing one side of the vertical plate and the connecting parts;

[0046] Figure 18 For two Figure 16 Schematic diagram of the structure after the saggers are stacked;

[0047] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0048] 1-base plate, 2-vertical plate, 3-connecting piece, 4-support bar. DETAILED DESCRIPTION

[0049] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that terms such as "vertical", "surrounding", "circumferential", "side", "sidewall", "lateral", and "bottom" indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Specific embodiment 1:

[0052] See also Figure 1-6 As shown, the present invention is a stackable thin-walled sagger, which adopts a sagger structure consisting of a bottom plate 1, four vertical plates 2 arranged vertically around the bottom plate 1, and a connector 3 that fixes the corners of two adjacent vertical plates 2 by bolts;

[0053] The circumference of the bottom plate 1 and the inner side walls of each upright plate 2 are limited by a concave-convex structure; in this specific embodiment, the concave-convex structure adopts a tenon groove provided on the bottom of the upright plate and a four-sided stepped tenon provided on the outer periphery of the bottom plate, and the tenon groove and the tenon are locked and limited; of course, in addition to the above structure, the use of a convex strip-shaped tenon provided on the bottom of the upright plate and a groove-shaped tenon groove provided on the four sides of the outer periphery of the bottom plate also falls within the scope of protection of this technical solution and can produce the same technical effect;

[0054] In this specific embodiment, the connector 3 adopts an inner corner connector, which is connected between the connector 3 and the vertical plate 2 by bolts; the inner corner connector adopts a columnar shape with a right-angled triangle cross section, and the outer walls of the right-angled sides of the inner corner connector are respectively fitted with the right-angled inner walls formed by the two adjacent vertical plates 2, and are connected to the inner corner connector by bolts passing through the holes opened on the two adjacent vertical plates 2;

[0055] An alignment limiting structure is provided between two adjacent vertical plates 2; the alignment limiting structure includes a limiting groove provided on the side of at least one vertical plate 2 of the two adjacent vertical plates 2, so that the side walls of the two adjacent vertical plates 2 remain flush; in this specific embodiment, Figure 1 As shown, one of the vertical plates is provided with a limit groove on both sides thereof, which is consistent with the width of the vertical plate 2. The vertical plates 2 with and without limit grooves are grouped into two, and the two are matched with each other to achieve limit alignment.

[0056] The bottom plate 1, the vertical plate 2 and the connecting member 3 are all made of carbon / carbon composite material; the wall thickness of the bottom plate 1 and the vertical plate 2 is 3-6 mm; specifically 3 mm in this embodiment;

[0057] like Figure 4-6 As shown, the upper end of the connecting member 3, i.e., the inner corner connecting member in this specific embodiment, is higher than the top surface of the vertical plate 2, and a gap is provided between the lower end of the connecting member 3 and the bottom end surface of the vertical plate 2, so that the saggers can be quickly aligned when stacked and are not easily misplaced during transportation;

[0058] In this specific embodiment, the bottom plate 1 is provided with first ventilation holes on its surface. The first ventilation holes are evenly arranged, and the aperture of the first ventilation holes is smaller than the aperture of the sagger used to support the sintered object. Figure 3 The schematic diagram of the structure of two saggers according to the embodiment of the present invention stacked one on top of the other is shown. The raised inner corner connector is used as a stacking positioning corner protector, which is more convenient and saves steps compared to the traditional step positioning method. Specific embodiment 2:

[0060] like Figure 7-9 As shown, the difference between this specific embodiment and specific embodiment 1 is that:

[0061] The bottom plate 1 does not have a first air vent on its surface, but the four vertical plates 2 have second air vents on their surfaces. The second air vents are evenly arranged, and the aperture of the second air vent is smaller than the aperture of the sintered material carried by the sagger. Figure 6 A schematic diagram of the structure of two saggers according to the embodiment stacked up and down is shown;

[0062] Regarding the second ventilation holes on the surface of the vertical plate 2, this specific embodiment only illustrates the case where all four vertical plates 2 are provided with second ventilation holes. Of course, the second ventilation holes may be provided on only two opposite sides of the vertical plates 2, or on three groups of vertical plates 2, or on two adjacent groups of vertical plates 2. All of these can achieve the effect of uniform heat conduction and fall within the scope of protection of this technical solution, and are not limited to the second ventilation holes provided on the four vertical plates 2 in this specific embodiment. Specific embodiment 3:

[0064] like Figure 10-15 As shown, the difference between this specific embodiment and specific embodiment 1 is that:

[0065] The connecting member 3 of this embodiment is specifically an external angle connecting member, which is connected between the connecting member 3 and the vertical plate 2 by bolts; the external angle connecting member is an L-shaped column, and the inner side wall of the right angle side of the external angle connecting member is respectively fitted with the right angle outer wall formed by the two adjacent vertical plates 2, and is connected to the external angle connecting member after passing through the holes opened on the two adjacent vertical plates 2; Figure 9 The schematic diagram of the structure of two saggers according to the embodiment of the present invention stacked one on top of the other is shown. The raised outer corner connector is used as a stacking positioning corner protector, which is more convenient and saves steps compared to the traditional step positioning method.

[0066] like Figure 12-15 As shown, the upper end of the connecting member 3, i.e., the outer corner connecting member in this specific embodiment, is higher than the top surface of the vertical plate 2, and a gap is provided between the lower end of the connecting member 3 and the bottom end surface of the vertical plate 2, so that the saggers can be quickly aligned when stacked and are not easily misplaced during transportation; Specific embodiment 4:

[0068] like Figure 16-18 As shown, the difference between this embodiment and the embodiment 3 is that: a support bar 4 is provided laterally on the outer side of the vertical plate 2; the support bar 4 is fixedly connected to the vertical plate 2 by bolts; the arrangement of the support bar 4 can provide effective support and clamping functions for transfer and operation transportation; Figure 12 The following is a schematic diagram of the structure of two saggers according to the present embodiment stacked up and down.

[0069] Regarding the support bars 4 provided laterally on the outer sides of the vertical plates 2, this specific embodiment only lists the case where the support bars 4 are provided on the sides of the four vertical plates 2. Of course, if the support bars 4 are provided on only the opposite sides of two vertical plates 2, the sagger can be conveniently transferred and transported, which falls within the scope of protection of this technical solution, and is not limited to being provided on the four vertical plates 2 of this specific embodiment.

[0070] The specific embodiments of this specification only list four embodiments. Of course, other embodiments that meet the content of this technical solution and are obtained based on the combination of various technical features all fall within the scope of protection of this technical solution, and are not limited to the contents of the four embodiments listed in this specification.

[0071] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A stacked thin-walled sagger, characterized in that: A sagger structure is provided, which is composed of a bottom plate (1), four vertical plates (2) arranged vertically around the bottom plate (1), and a connecting piece (3) for fixing the corners of two adjacent vertical plates (2) with bolts. The circumferential side of the bottom plate (1) and the inner side walls of each upright plate (2) are limited by a concave-convex structure; The connecting piece (3) is an inner corner connecting piece or an outer corner connecting piece, and is connected between the connecting piece (3) and the vertical plate (2) via bolts.

2. A stacked thin-walled sagger according to claim 1, characterized in that: The concave-convex structure adopts a mortise and tenon groove opened horizontally at the bottom of the vertical plate and a four-sided stepped tenon set on the outer peripheral side of the bottom plate, or adopts a convex strip-shaped tenon opened horizontally at the bottom of the vertical plate and a groove-shaped tenon groove set on the four sides of the outer peripheral side of the bottom plate; the mortise and tenon groove are locked and limited.

3. The stacked thin-walled sagger according to claim 1, characterized in that: The inner corner connector is in the shape of a column with a right-angled triangle cross section. The outer side walls of the right-angled sides of the inner corner connector are respectively fitted with the right-angled inner walls formed by the two adjacent vertical plates (2). Bolts are respectively passed through holes opened on the two adjacent vertical plates (2) and then connected to the inner corner connector.

4. The stacked thin-walled sagger according to claim 1, characterized in that: The outer corner connector is in an L-shaped column, and the inner side walls of the right-angled sides of the outer corner connector respectively fit with the right-angled outer walls formed by the two adjacent vertical plates (2), and are connected to the outer corner connector by bolts passing through holes opened on the two adjacent vertical plates (2).

5. The stacked thin-walled sagger according to claim 1, characterized in that: A first air vent is provided on the surface of the bottom plate (1).

6. The stacked thin-walled sagger according to claim 1, characterized in that: A second air vent is provided on the surface of the vertical plate (2).

7. The stacked thin-walled sagger according to claim 1, characterized in that: A support strip (4) is transversely provided on the outer side of the vertical plate (2); the support strip (4) and the vertical plate (2) are integral or fixedly connected by bolts.

8. The stacked thin-walled sagger according to claim 1, characterized in that: An alignment limiting structure is provided between two adjacent vertical plates (2); the alignment limiting structure comprises a limiting groove provided on the side of at least one of the two adjacent vertical plates (2), so that the side walls of the two adjacent vertical plates (2) remain flush.

9. The stackable thin-walled sagger according to claim 1, characterized in that: The bottom plate (1), the vertical plate (2) and the connecting piece (3) are all made of carbon / carbon composite material; the wall thickness of the bottom plate (1) and the vertical plate (2) is 3-6 mm.

10. The stackable thin-walled sagger according to claim 1, characterized in that: The upper end of the connecting member (3) is higher than the top surface of the vertical plate (2), and a gap is provided between the lower end of the connecting member (3) and the bottom end surface of the vertical plate (2), so that the saggers can be quickly aligned when stacked and are not easily misplaced during transportation.

Images