Container type furnace bar frame

Abstract

The invention discloses a container type furnace fence frame, and belongs to the technical field of heat treatment appliances, a bottom plate and a limiting plate are connected through a plurality of vertical rods, and the container type furnace fence frame is of a latticed rectangular fence frame structure on the whole and is used for containing a plurality of workpieces in the heat treatment process and keeping the workpieces arranged at equal intervals. The bottom plate is provided with a permeable source structure for permeability of the workpiece and a positioning part for fixing the vertical rod, and the positioning part adopts an embedded structure to ensure stable installation of the vertical rod. Limiting holes are evenly distributed in the limiting plate and used for inserting workpieces and achieving accurate limiting, and stable installation is formed through cooperation of the positioning structure and the vertical rods. The bottom end and the middle section of the vertical rod are provided with embedded matching structures which are firmly connected with the bottom plate and the limiting plate, and stable supporting is provided. The connecting rods are connected with the two rows of vertical rods in the middle, the overall rigidity of the frame structure is further enhanced, and detachable constraint on the limiting plates is formed. According to the fence frame, orderly loading and precise positioning of workpieces are facilitated, the workpieces are effectively prevented from being collided or dislocated in the furnace loading process, and the uniformity and quality of heat treatment are improved.

Description

Technical Field

[0001] The present invention belongs to a technical solution in the technical field of heat treatment equipment. Specifically, the present invention relates to a grate frame capable of accommodating multiple workpieces to be loaded into a furnace together, and in particular to a containerized grate frame capable of keeping the workpieces arranged at equal intervals. Background Art

[0002] The pistons used in mining impactors are usually made of low-alloy structural steel. After finishing, they need to go through a heat treatment process to optimize the performance of the final product. The heat treatment process includes carburizing, quenching, tempering and other steps, aiming to improve the hardness, wear resistance and service life of the piston. However, the prior art generally adopts the method of loading bulk workpieces into the furnace for heat treatment. This method of loading the furnace is simple to operate, has high loading efficiency, and is suitable for mass production, but it also has the following outstanding problems: In the state of bulk stacking, the contact between the workpieces will inevitably cause surface bumps and scratches, resulting in appearance defects of the piston. Such defects not only affect product quality, but may also lead to the complication of subsequent process flow and increase of production costs.

[0003] The bulk stacked workpieces are arranged in disorder, and overlapping areas may appear between adjacent workpieces, resulting in insufficient carburizing effect in these areas, affecting the consistency of the hardness of the piston surface. This problem directly weakens the overall performance of the product, especially the wear resistance and fatigue resistance.

[0004] The disordered arrangement of bulk workpieces in the furnace can easily cause uneven heat flow distribution, which further leads to differences in the heating conditions of the workpieces, thus affecting the consistency of the heat treatment effect. This defect may lead to unstable performance of batch products and increase the difficulty of quality control.

[0005] Although existing patent technologies such as CN102703908A propose a heat treatment method for an impact piston, which covers processes such as carburizing, quenching and tempering, they do not provide a specific solution for the design of the furnace frame. Therefore, they cannot effectively solve the problems of surface bumps and uneven carburizing that occur when bulk workpieces are put into the furnace.

[0006] In response to the above problems, the industry has been exploring effective solutions to optimize the furnace loading method to reduce workpiece damage, improve carburizing uniformity, and improve the consistency of heat treatment quality. To this end, it is particularly necessary and urgent to propose an innovative containerized furnace fence design to arrange workpieces in an orderly manner, optimize furnace loading efficiency and heat treatment effect, and thus overcome the shortcomings of the existing technology. Summary of the invention

[0007] The present invention mainly aims at the problems in the prior art of disorderly stacking work, which makes the surface of the workpiece vulnerable to damage, uneven carburizing effect, poor heat treatment consistency and thus leads to differences in heat treatment quality. The present invention proposes a containerized furnace fence with simple structure, orderly arrangement of workpieces, high furnace loading efficiency, easy unloading and good heat treatment quality consistency.

[0008] In order to solve the above problems, the present invention provides a containerized grate frame, comprising a bottom plate and a limit plate matched with the bottom plate, wherein the bottom plate and the limit plate are connected by a plurality of rigid rods, and the rigid rods are connected by connecting rods; The bottom plate, the limit plate, the rigid rod and the connecting rod are in a grid-like rectangular frame structure, which is used to accommodate multiple workpieces and keep them arranged at equal intervals during the heat treatment process; The bottom plate is provided with a source-transmitting structure for the permeability of the workpiece and a positioning part for fixing the vertical rod, and the positioning part has an embedded structure; The limiting plate has evenly distributed limiting holes for inserting workpieces and realizing position limiting, and is installed in cooperation with the vertical rod through a positioning structure; The vertical rod is used to form a support between the bottom plate and the limit plate. The bottom end and the middle section of the vertical rod are provided with an embedded matching structure, which is connected with the bottom plate and the limit plate to form a stable support; The connecting rod is used to connect the two rows of vertical rods in the middle, so as to form a detachable restraining structure for the limiting plate.

[0009] Preferably, the bottom plate and the limit plate are matched rectangular plates with equal plane dimensions. The precise matching of the bottom plate and the limit plate dimensions ensures the stability and strength of the overall structure of the grate frame, so that the workpieces can be arranged at uniform spacing during the heat treatment process, thereby avoiding arrangement errors and uneven heating of the workpieces caused by structural asymmetry, and significantly improving the quality consistency of the heat treatment.

[0010] Preferably, the source-penetrating structure is a through hole evenly distributed on the surface of the bottom plate, and the positioning part includes countersunk holes arranged at equal intervals on the four frame surfaces of the bottom plate, and a radially concave female tenon is arranged in the countersunk hole. Through the through holes of the bottom plate, the limiting holes and process holes of the limiting plate, the vertical rods and the workpiece are arranged in an orderly interval, the permeability and homogeneity of the workpiece during positioning and installation and heat treatment are achieved. The evenly distributed through holes of the bottom plate and the limiting holes and process holes on the limiting plate greatly improve the permeability of the heat flow in the furnace, ensuring that each workpiece can be evenly heated during the heat treatment process, while reducing the heat treatment time and improving production efficiency. Through the support of the through hole design and the auxiliary function of the process hole, the thermal deformation of the workpiece can be effectively reduced and the product quality can be improved.

[0011] Preferably, the limit plate is formed by splicing two rectangular plates of the same shape and size, and the joint is arranged at the fold of the length dimension. The limit holes are circular limit holes evenly distributed on the plate surface of the limit plate. The positioning structure is to add hollow triangular process holes on the plate surface between the limit holes located at the edge and to add hollow quadrilateral process holes on the plate surface between the remaining limit holes. In addition, there are guide holes set on the four sides of the limit plate according to the countersunk hole positions configured on the bottom plate. The limit plate adopts a splicing design of two rectangular plates, which increases the flexibility of loading and unloading, reduces the risk of thermal deformation during heat treatment, and thus reduces the strength requirements of the limit plate. In addition, the circular limit holes, triangular process holes and quadrilateral process holes on the limit plate jointly optimize the positioning and arrangement of the workpiece, which helps to achieve rapid operation during furnace loading, improve loading and unloading efficiency, and further reduce thermal energy consumption during heat treatment.

[0012] Preferably, the vertical rod is a straight rod, and the embedded matching structure is a radially protruding male tenon set on the bottom end and the outer wall of the middle section. The male tenon at the bottom end of the vertical rod is inserted into the countersunk hole of the bottom plate, and the evenly distributed vertical rods form a framework that supports the limit plate from the male tenon on the outer wall of the middle section. The two rows of rigid rods in the middle are connected by a connecting rod to form a detachable constraint structure for the two limit plates. The embedded matching structure design of the bottom end and the middle section of the vertical rod ensures a stable connection between the vertical rod and the bottom plate and the limit plate, thereby improving the structural strength and durability of the overall frame. This structure also allows for more convenient disassembly and assembly of the limit plate, which is helpful for daily maintenance and cleaning, and improves the service life and work efficiency of the equipment.

[0013] Preferably, the transverse cross section of the female tenon is cross-shaped and concave; the transverse cross section of the male tenon is cross-shaped and convex, and the female tenon and the male tenon are interlocked with each other. The cross-shaped interlocking structure provides better anti-sliding and anti-rotation capabilities than traditional circular or rectangular cross sections, significantly improving the stability and impact resistance of the structure. At the same time, this structure also facilitates the rapid assembly and disassembly of components, reducing maintenance costs and the complexity of loading and unloading operations.

[0014] Preferably, the through holes evenly distributed on the surface of the base plate are polygonal holes, and the diameter of the inscribed circle thereof is at least 10 mm smaller than the outer diameter of the workpiece, so as to ensure the stable support and permeability of the base plate to the workpiece. By controlling the diameter of the inscribed circle of the through holes of the base plate to be at least 10 mm smaller than the outer diameter of the workpiece, it is ensured that the workpiece is stably supported on the base plate and prevented from moving during the heat treatment process, and the safety and heat flow permeability of the heat treatment process are improved, thereby optimizing the heat treatment effect.

[0015] Preferably, the limiting holes evenly distributed on the surface of the limiting plate are circular holes, and their inner diameter is at least 2.0 mm larger than the outer diameter of the workpiece, which not only ensures the smoothness of the workpiece loading and unloading process, but also effectively reduces the friction and damage between the workpiece surface and the limiting holes, further improving the appearance quality and service life of the workpiece.

[0016] Preferably, the thickness of the limit plate is thinner than that of the bottom plate, and the difference in thickness is at least 3 times. The limit plate adopts a thin-wall design, which is at least three times thinner than the bottom plate, which not only reduces the material cost, but also reduces the heat loss of the limit plate during the heat treatment process. This structural optimization further improves cost-effectiveness and energy utilization while achieving the function.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention provides a limit plate so that the workpieces can be arranged and fixed in an orderly manner at uniform intervals, completely avoiding the problems of workpiece surface bumps and scratches caused by disordered arrangement in the existing bulk stacking method, thereby effectively improving the product appearance quality and the reliability of subsequent processes.

[0018] The limiting holes on the limiting plate of the present invention are used to install the workpieces, thereby ensuring that the spacing between the workpieces is consistent, avoiding the overlap of adjacent workpiece surfaces, and significantly improving the uniformity of the carburizing process. This improvement directly enhances the consistency of the hardness of the piston surface, optimizes its wear resistance and fatigue resistance, ensures that the workpieces are homogeneously heat treated after entering the furnace, and thus improves the overall performance of the product.

[0019] The bottom plate, limit plate, rigid rod and connecting rod of the present invention are integrally formed into a grid-like rectangular frame structure. By optimizing the grid design of the furnace frame, the uniform distribution of workpieces in the heat treatment furnace is achieved, the problem of uneven heat flow distribution is effectively improved, the consistency of heat treatment effects of batch workpieces is significantly improved, and the volatility of product quality is reduced.

[0020] The limit plate of the present invention adopts a split structure, which is not only easy to install and disassemble, but most importantly reduces the thermal deformation of the limit plate, thereby reducing the strength requirement of the limit plate. Thinning the limit plate not only reduces production costs, but also reduces heat loss during heat treatment.

[0021] The vertical rod of the present invention is firmly connected to the bottom plate and the limit plate through an embedded structure, thus constructing a stable supporting structure, ensuring the deformation resistance and durability of the grate frame during long-term use, extending the service life of the equipment and reducing the frequency of equipment replacement.

[0022] The base plate, the limit plate, the vertical rod and the connecting rod of the present invention are modularly combined, which is very convenient for assembly and disassembly, and is easy to clean and maintain, thereby improving the versatility and maintenance efficiency of the grate frame and meeting the needs of industrial mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention.

[0024] Figure 2 yes Figure 1A three-dimensional schematic diagram of the base plate shown in FIG.

[0025] Figure 3 yes Figure 2 A three-dimensional schematic diagram of the countersunk hole shown in FIG.

[0026] Figure 4 yes Figure 1 A three-dimensional schematic diagram of the limiting plate 2 is shown in FIG.

[0027] Figure 5 yes Figure 1 A three-dimensional schematic diagram of the vertical rod shown in .

[0028] Figure 6 yes Figure 1 A three-dimensional schematic diagram of the connecting rod shown in FIG.

[0029] Figure 7 It is a three-dimensional schematic diagram of the container-mounted workpiece of the present invention.

[0030] In the figure: 1-bottom plate, 1.1-through hole, 1.2-counterbore, 1.3-female tenon, 2-limiting plate, 2.1-guide hole, 2.2-limiting hole, 2.3-triangular process hole, 2.4-quadrilateral process hole, 3-hard rod, 3.1-male tenon, 4-connecting rod. DETAILED DESCRIPTION

[0031] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.

[0032] Reference Figure 1 The containerized grate frame shown in the figure is composed of a bottom plate 1, a limit plate 2, a rigid rod 3 and a connecting rod 4 to form a grid-shaped rectangular fence. Figure 2 The bottom plate 1 and Figure 4 The limit plate 2 shown is a paired rectangular plate. The two plates have equal planar dimensions, but unequal thickness dimensions, and it is explicitly required that the thickness dimension of the limit plate 2 is thinner than that of the base plate 1, and the thickness difference is at least 3 times. This embodiment is used for the carburizing treatment of the piston of a 5-ton mining impactor. The number of workpieces integrated and placed at one time is 28, with a total weight of 15kg. Since the base plate 1 directly bears the workpiece, it must have sufficient structural strength to meet the matching requirements, and the role of the limit plate 2 in the structure is only container-type limiting, so the thickness of the limit plate 2 does not need to be too thick. Based on the above structural design principles, the thickness of the base plate 1 in this embodiment is set to 30mm, and the thickness of the limit plate 2 is set to 10mm. The through holes 1.1 uniformly distributed on the surface of the base plate 1 are polygonal holes, and the diameter of the inscribed circle is at least 10mm smaller than the outer diameter of the workpiece. In this embodiment, the outer diameter of the workpiece is Φ100mm, and the matching through holes 1.1 of the base plate 1 are as follows. Figure 2The hexagonal hole shown has an inscribed circle of 490 mm. The purpose of this structural design is to ensure that the bottom plate 1 can stably carry the workpiece without reducing the permeability of the bottom end of the workpiece at the installation position. The four frame surfaces of the bottom plate 1 are provided with countersunk holes 1.2 arranged at equal intervals, such as Figure 3 The countersunk hole 1.2 shown in the figure is provided with a radially concave female tenon 1.3. In this embodiment, a total of 8 countersunk holes 1.2 are provided on the surface of the bottom plate 1. The countersunk holes 1.2 are used to position and place the vertical rods 3. The position limiting plate 2 is as shown in FIG. Figure 4 As shown, it is formed by splicing two rectangular plates of the same shape and size, and the butt joint is set at the fold of the length dimension. In this embodiment, 28 circular limiting holes 2.2 are evenly distributed on the plate surface of the limiting plate 2, of which 4 limiting holes 2.2 are arranged in a horizontal row and 7 limiting holes 2.2 are arranged in a vertical row. From the perspective of convenient loading and unloading of workpieces, the structure requires that the inner diameter of the limiting hole 2.2 is at least 2.0mm larger than the outer diameter of the workpiece. In this embodiment, the inner diameter of the limiting hole 2.2 is 2.5mm larger than the outer diameter of the workpiece. In order to further improve the permeability of the limiting plate 2 and reduce thermal deformation and heat loss, process holes are added to the limiting plate 2, and hollow triangular process holes 2.3 are added on the plate surface between the limiting holes 2.2 located at the edge, and hollow quadrilateral process holes 2.4 are added on the plate surface between the remaining limiting holes 2.2. The guide holes 2.1 are set on the four frame surfaces of the limit plate 2 according to the positions of the countersunk holes 1.2 configured on the bottom plate 1. The guide holes 2.1 are directly matched with the vertical rods 3 to realize the positioning and installation of the limit plate 2. The vertical rods 3 are Figure 5 The straight rod shown has radially protruding male tenons 3.1 on the bottom end and the outer wall of the middle section.

[0033] When assembling the containerized grate frame in this embodiment, first insert the bottom tenon of the vertical rod 3 into the countersunk hole 1.2 of the bottom plate 1. In this embodiment, a total of 8 vertical rods 3 are provided, thereby forming a double-layer frame in which the vertical rods 3 support the limit plate 2 together with the tenon on the outer wall of the middle section. In order to further improve the rigidity and stability of the double-layer frame, the female tenon in the countersunk hole 1.2 configured in the bottom plate 1 is a cross-shaped concave structure in cross section, and the male tenon configured on the bottom end of the vertical rod 3 and the outer wall of the middle section is a cross-shaped convex structure in transverse section. After installation, the female tenon and the male tenon form a matching structure. The connecting rod 4 is as shown in FIG. Figure 6 As shown, it is directly mounted on the two rows of vertical rods 3 in the middle, and this overlapping connection constitutes a detachable constraint structure for the two limit plates 2. In addition, after the connecting rod 4 is installed in place, the overall rigidity of the container furnace fence is increased, which is beneficial to the furnace loading and unloading operations and improves the heat treatment efficiency.

[0034] When the present invention is actually used, the workpiece is directly inserted into the limiting hole set by the limiting plate 2, such as Figure 7As shown in the figure, a total of 28 workpieces are assembled. This type of assembled furnace fence can effectively achieve the positioning of the workpieces once they are installed in place. Since the workpieces are arranged in an orderly and staggered manner, collisions between the workpieces are avoided when loading the furnace, and it is also beneficial to improve the quality of heat treatment.

[0035] In order to facilitate understanding of the above technical solutions of the present invention, the above technical solutions of the present invention are described in detail below through specific usage methods.

[0036] The specific assembly and working process are as follows: first, insert the male tenon 3.1 of the embedded matching structure bottom of the vertical rod 3 into the countersunk hole 1.2 of the positioning part on the bottom plate 1, ensuring that the male tenon 3.1 is firmly embedded with the female tenon 1.3 of the embedded structure to form a stable support point; then align the guide hole 2.1 of the positioning structure of the limit plate 2 with the male tenon 3.1 of the middle section of the vertical rod, and gently press the limit plate 2 to the middle section of the vertical rod 3 to ensure that the limit plate 2 evenly covers all the vertical rods 3, and use two splicing plates to splice to form a complete limit plate 2, and ensure seamless fit at the joints; set a connecting rod 4 between the middle two rows of the vertical rods 3, fix it to the male tenon part of the vertical rod 3, increase the rigidity and stability of the overall frame, and then insert the workpiece into the limiting hole 2.2 of the limiting plate 2, and each workpiece is sequentially installed in the corresponding hole position to ensure that the workpieces are arranged in order and the spacing is uniform, check whether the workpiece is fully inserted into the through hole of the bottom plate, and ensure that the workpiece does not shake in the hole position to avoid position displacement during heat treatment due to loosening. Then move the assembled containerized grate frame together with the workpiece as a whole to the heat treatment furnace, use the lifting equipment to slowly put the grate frame into the designated position in the furnace, ensure that the frame is placed stably to avoid tilting or collision, adjust the furnace temperature according to the process requirements, and start the heat treatment process (such as carburizing, quenching or tempering). The grid structure allows the heat flow to evenly penetrate the workpiece, ensuring that each workpiece is heated evenly during the heat treatment process. The through holes, process holes and other pore structures of the bottom plate 1 and the limit plate 2 greatly improve the permeability of the heat flow in the furnace, avoiding heat flow retention or deviation. The limit holes fix the position of the workpiece, prevent the workpieces from bumping or scratching each other, and improve the appearance quality. The equal spacing arrangement avoids the overlap between the workpieces, ensures that the carburized layer is uniform, and improves the consistency of the surface hardness. After the heat treatment is completed, use the lifting equipment to move the grate frame out of the furnace as a whole and place it on a cooling table or a special area for cooling. During the cooling process, ensure that the workpiece remains fixed in the frame to avoid position displacement or thermal deformation of the workpiece caused by rapid cooling.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features of the invention described herein.

Claims

1. A containerized grate frame, comprising a bottom plate (1) and a limit plate (2) matched with the bottom plate, wherein the bottom plate (1) and the limit plate (2) are connected by a plurality of rigid rods (3), and the rigid rods (3) are connected by connecting rods (4); characterized in that: The bottom plate (1), the limit plate (2), the rigid rod (3) and the connecting rod (4) are in the form of a grid-like rectangular frame structure, which is used to accommodate a plurality of workpieces and keep them arranged at equal intervals during the heat treatment process; The bottom plate (1) is provided with a source-transmitting structure for the permeability of the workpiece and a positioning portion for fixing the vertical rod, and the positioning portion has an embedded structure; The limiting plate (2) has evenly distributed limiting holes for inserting workpieces and realizing position limiting, and is installed in cooperation with the vertical rod through a positioning structure; The vertical rod (3) is used to form a support between the bottom plate (1) and the limiting plate (2); the bottom end and the middle section of the vertical rod (3) are provided with an embedded matching structure, which is connected with the bottom plate and the limiting plate to form a stable support; The connecting rod (4) is used to connect the two rows of vertical rods (3) located in the middle, thereby forming a detachable restraining structure for the limiting plate (2).

2. The containerized grate frame according to claim 1, characterized in that: The bottom plate (1) and the limiting plate (2) are paired rectangular plates with equal planar dimensions.

3. The containerized grate frame according to claim 1, characterized in that: The source-transmitting structure is through holes (1.1) evenly distributed on the surface of the bottom plate (1), and the positioning portion comprises countersunk holes (1.2) arranged at equal intervals and provided on the surface of the four frame frames of the bottom plate (1), wherein a radially inwardly concave female tenon (1.3) is provided in the countersunk hole (1.2).

4. The containerized grate frame according to claim 3, characterized in that: The limit plate (2) is formed by splicing two rectangular plates of the same shape and size, wherein the butt joint is arranged at the folded portion of the length dimension, the limit holes are circular limit holes (2.2) evenly distributed on the plate surface of the limit plate (2), the positioning structure is hollow triangular process holes (2.3) added on the plate surface between the limit holes (2.2) located at the edge, and hollow quadrilateral process holes (2.4) added on the plate surface between the remaining limit holes (2.2), and in addition, there are guide holes (2.1) set on the plate surfaces of the four sides of the limit plate (2) according to the positions of the countersunk holes (1.2) arranged on the bottom plate (1).

5. The containerized grate frame according to claim 3, characterized in that: The vertical rod (3) is a straight rod, and the embedded matching structure is a radially protruding male tenon (3.1) arranged on the bottom end and the outer wall of the middle section. The male tenon (3.1) at the bottom end of the vertical rod (3) is inserted into the countersunk hole (1.2) of the bottom plate (1), and the evenly distributed vertical rods (3) form a frame that supports the limit plate (2) from the male tenon on the outer wall of the middle section. The two rows of vertical rods (3) in the middle are connected by a connecting rod (4), forming a detachable constraint structure for the two limit plates (2).

6. The containerized grate frame according to claim 5, characterized in that: The transverse cross section of the female tenon (1.3) is cross-shaped and concave; the transverse cross section of the male tenon (3.1) is cross-shaped and convex, and the female tenon (1.3) and the male tenon (3.1) are interlocked.

7. The containerized grate frame according to claim 1, characterized in that: The through holes (1.1) evenly distributed on the surface of the bottom plate (1) are polygonal holes, the diameter of the inscribed circle of which is at least 10 mm smaller than the outer diameter of the workpiece, so as to ensure the stable support and permeability of the bottom plate to the workpiece.

8. The containerized grate frame according to claim 1, characterized in that: The limiting holes (2.2) evenly distributed on the surface of the limiting plate (2) are circular holes, the inner diameter of which is at least 2.0 mm larger than the outer diameter of the workpiece, so as to facilitate loading and unloading of the workpiece.

9. The containerized grate frame according to claim 1, characterized in that: The limiting plate (2) is thinner than the bottom plate (1), and the thickness difference is at least 3 times.

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