JP7182087B2 - Frame structure and core members - Google Patents

Description

The present invention relates to frame structures and reactor internals.

Furnace members are used to install workpieces in firing furnaces, heating furnaces, heat treatment furnaces, etc., and to arrange structures such as muffle furnaces.

Patent Literature 1 describes a heat-treated mount that is formed using a carbon fiber-based composite material. Furthermore, carbon fiber-based composite materials are used as the materials for the components of the heat-treating rack. It is described that this carbon fiber-based composite material is made by sintering carbon fibers or by hot-press molding.

JP-A-8-240391

However, the invention disclosed in Patent Document 1 requires various processes to obtain a desired shape, such as sintering carbon fibers and hot press molding, in order to produce a carbon fiber-based composite material. used. Adopting various processes complicates the process, takes a long time to manufacture, and raises the cost.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a frame structure and a reactor internal member that can be manufactured in a short period of time by a simple process.

The frame structure of the present invention for solving the above problems is as follows.

(1) It comprises a plurality of pipes made of carbon fiber reinforced carbon composite material and a plurality of joints made of carbonaceous material connecting the plurality of pipes.

Since the overall shape is formed only by joining the pipes and joints, there is no need to form carbon fiber reinforced carbon composite materials that match individual shapes, and the manufacturing period can be shortened.

Moreover, since it consists of pipes and joints, it can be packed in a small size by disassembling it into individual parts. For this reason, it is possible to compactly deliver the product to the place of use and assemble it on site, thereby reducing transportation costs.

Furthermore, by manufacturing a plurality of pipes of standard length in advance and combining them according to the desired shape, it is possible to correspond to various shapes and sizes, and to efficiently obtain various kinds of frame structures. can be done. In addition, the frame structure can be reused by recombining the pipes and joints according to the desired shape.

Even if it is placed in a high-temperature furnace and used, for example, as a frame, a strong and stable frame structure can be provided.

Furthermore, the structure of the present invention preferably has the following aspects.

(2) The pipe has an insertion portion, and the joint has a connection hole into which the insertion portion is inserted.

Since the pipe has an insertion portion and the joint has a connection hole into which the insertion portion is inserted, the joint covers the pipe at the connecting portion. For this reason, a large force is less likely to be applied to the joint, increasing the degree of freedom in material selection. Therefore, not only carbon fiber reinforced carbon composite material but also graphite material having relatively low strength can be selected.

(3) The joint is made of graphite.

Although the material of the joint of the present invention is not particularly limited, graphite, carbon fiber reinforced carbon composite material, SiC, etc. can be used. Among them, graphite is easy to obtain a uniform block, such as a cube or a rectangular parallelepiped, which is packed to the inside, and is easy to process, so that the joint of the present invention can be easily obtained.

(4) The joint has two to six connection holes arranged along three mutually orthogonal directions.

Since the joint has 2 to 6 connection holes arranged along three mutually perpendicular axes, it is possible to freely combine joints with different numbers of connection holes to obtain frame structures of various shapes. .

(5) The joint further has a connection hole arranged along an axis between any two of the three axes.

Since the joint further has a connection hole arranged along an axis sandwiched between any two of the three axes, a plurality of pipes form a frame and any of the three axes can be connected. A frame structure with braces is formed, and a strong and complex frame structure is formed because the pipes that form the braces can be placed from the connecting holes arranged along the axis sandwiched between the two axes of I can handle things.

(6) The connection hole has a bottom.

Since the connecting hole has a bottom, it can act as a stop without the risk of the pipe penetrating the joint. However, the joint may penetrate through the connecting holes facing each other at the central portion of the bottom.

(7) The wall surface of the connection hole and the wall surface of the pipe insertion portion are tapered surfaces having the same inclination angle.

When the wall surface of the connection hole and the wall surface of the insertion portion are tapered surfaces having the same inclination angle, they can be tightly inserted and firmly connected by deep insertion.

(8) The pipe and the joint are joined with a carbon-based adhesive layer.

Bonding with the carbon-based adhesive layer enables stronger bonding. In addition, by providing the carbon-based adhesive layer between the wall surfaces of the insertion portion of the wall surface of the connection hole, which are tapered at the same inclination angle, the carbon-based adhesive layer shrinks during the carbonization process and the gap becomes smaller. Therefore, it is difficult for pores to form, and a strong bond can be obtained.

(9) The in-core member of the present invention for solving the above problems uses a frame structure.

In addition, since the frame structure is made of only carbon-based materials, it can maintain sufficient strength even at high temperatures, and can be suitably used as a core member.

Since the overall shape is formed only by joining the pipes and joints, there is no need to form carbon fiber reinforced carbon composite materials that match individual shapes, and the manufacturing period can be shortened. Moreover, since it consists of pipes and joints, it can be packed in a small size by disassembling it into individual parts. For this reason, it is possible to compactly deliver the product to the place of use and assemble it on site, thereby reducing transportation costs. Furthermore, by manufacturing a plurality of pipes of standard length in advance and combining them according to the desired shape, it is possible to correspond to various shapes and sizes, and to efficiently obtain various kinds of frame structures. can be done. In addition, the frame structure can be reused by recombining the pipes and joints according to the desired shape. Even if it is placed in a high-temperature furnace and used, for example, as a frame, it is possible to provide a strong and stable frame structure and in-furnace members.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows an example of 1st Embodiment of the frame structure which concerns on this invention. 1A and 1B show an example of pipes and joints of a frame structure according to the present invention, including (a) an exploded perspective view and (b) a joint sectional view; An example of 2nd Embodiment of the frame structure which concerns on this invention is shown, (a) Perspective view of the whole, (b) Enlarged view of a joint part. An example of 3rd Embodiment of the frame structure which concerns on this invention is shown, (a) Top view, (b) Side view. BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing which shows an example of Example 1 of the joint structure of the pipe which concerns on this invention, and a joint. Sectional drawing which shows an example of Example 2 of the joining structure of the pipe which concerns on this invention, and a joint. An example of Example 3 of the joint structure of the pipe which concerns on this invention, and a joint is shown, (a) sectional drawing, (b) The top view of a joint. FIG. 11 is a cross-sectional view showing an example of a fourth embodiment of the joining structure of a pipe and a joint according to the present invention;

(Detailed description of the invention)
A frame structure of the present invention for solving the above-mentioned problems comprises a plurality of pipes made of carbon fiber reinforced carbon composite material, and a plurality of joints made of carbonaceous material connecting the plurality of pipes.

Since the overall shape is formed only by joining the pipes and joints, there is no need to form carbon fiber reinforced carbon composite materials that match individual shapes, and the manufacturing period can be shortened.

Moreover, since it consists of pipes and joints, it can be packed in a small size by disassembling it into individual parts. For this reason, it is possible to compactly deliver the product to the place of use and assemble it on site, thereby reducing transportation costs.

Furthermore, by manufacturing a plurality of pipes of standard length in advance and combining them according to the desired shape, it is possible to correspond to various shapes and sizes, and to efficiently obtain various kinds of frame structures. can be done. In addition, the frame structure can be reused by recombining the pipes and joints according to the desired shape.

Then, even if it is placed in a high-temperature furnace of, for example, 1000° C. or more and used as, for example, a frame structure, a strong and stable frame structure can be provided.

The pipe of the present invention is not particularly limited, and aggregates obtained by a filament winding method for winding carbon fiber bundles and a braiding method for forming carbon fiber bundles by weaving can be used. The matrix formed between the aggregates can be pyrolytic carbon obtained by pyrolyzing a hydrocarbon gas, or vitreous carbon obtained by pyrolyzing a carbon precursor such as phenol resin or copna resin.

Further, in the structure of the present invention, the pipe has an insertion portion, and the joint has a connection hole into which the insertion portion is inserted.

Since the pipe has an insertion portion and the joint has a connection hole into which the insertion portion is inserted, the joint covers the pipe at the connecting portion. For this reason, a large force is less likely to be applied to the joint, increasing the degree of freedom in material selection. Therefore, not only carbon fiber reinforced carbon composite material but also graphite material having relatively low strength can be selected.

The joint is made of graphite.

Although the material of the joint of the present invention is not particularly limited, graphite, carbon fiber reinforced carbon composite material, and the like can be used. Among them, graphite is easy to obtain a uniform block, such as a cube or a rectangular parallelepiped, which is packed to the inside, and is easy to process, so that the joint of the present invention can be easily obtained.

The joint has two to six connection holes arranged along three mutually orthogonal directions.

Since the joint has 2 to 6 connection holes arranged along three mutually perpendicular axes, it is possible to freely combine joints with different numbers of connection holes to obtain frame structures of various shapes. .

The joint has at least one plane that is sandwiched between any two of the three axes and perpendicularly intersects the axes that are in the same plane.

Since the joint further has a connection hole arranged along an axis sandwiched between any two of the three axes, a plurality of pipes form a frame and any of the three axes can be connected. A frame structure with braces is formed, and a strong and complex frame structure is formed because the pipes that form the braces can be placed from the connecting holes arranged along the axis sandwiched between the two axes of I can handle things.

The connection hole has a bottom.

Since the connecting hole has a bottom, it can act as a stop without the risk of the pipe penetrating the joint. However, the joint may penetrate through the connecting holes facing each other at the central portion of the bottom.

The wall surface of the connection hole and the wall surface of the pipe insertion portion are tapered surfaces having the same inclination angle.

When the wall surface of the connection hole and the wall surface of the insertion portion are tapered surfaces having the same inclination angle, they can be tightly inserted and firmly connected by deep insertion.

The pipe and the joint are joined with a carbon-based adhesive layer.

Bonding with the carbon-based adhesive layer enables stronger bonding. In addition, by providing the carbon-based adhesive layer between the wall surfaces of the insertion portion of the wall surface of the connection hole, which are tapered at the same inclination angle, the carbon-based adhesive layer shrinks during the carbonization process and the gap becomes smaller. Therefore, it is difficult for pores to form, and a strong bond can be obtained.

The core member of the present invention uses a frame structure.

In addition, since the frame structure is made of only carbon-based materials, it can maintain sufficient strength even at high temperatures, and can be suitably used as a core member.

(Embodiments for carrying out the invention)
FIG. 1 is a perspective view showing a first embodiment of a frame structure according to the invention. FIG. 2 shows pipes and joints of a frame structure according to the present invention, where (a) is an exploded perspective view and (b) is a joint sectional view. The frame structure will be explained based on FIGS. 1 and 2. FIG.

The frame structure 1 comprises a plurality of pipes 10 of carbon fiber reinforced carbon composite material and a plurality of joints 20 of carbonaceous material (eg graphite). The frame structure 1 has three axes of an X-axis, a Y-axis and a Z-axis in an orthogonal coordinate system. It is a three-dimensional object.

As shown in FIG. 2, an insertion portion 11 is formed at the tip of the pipe 10, and a wall surface 12 is provided on the outer circumference of the insertion portion 11. As shown in FIG. A plurality of connection holes 21 are formed in the joint 20, the inner surfaces of the connection holes 21 are provided with wall surfaces 22, and the connection holes 21 are provided with a bottom 23 having a predetermined depth. The joint 20 can be a regular polyhedron having a plurality of faces (planes) 24, such as a tetrahedron, a hexahedron, and an octahedron, or an octahedron obtained by chamfering 12 sides of the hexahedron.

The connection hole 21 of the joint 20 has a predetermined inner diameter that allows the insertion portion 11 of the pipe 10 to be inserted therein. The wall surfaces 12 and 22 of the connection hole 21 and the insertion portion 11 are in contact with each other and are bonded with a carbon-based adhesive 30 .

FIG. 3 is a perspective view showing a second embodiment of the frame structure 1, (a) an overall perspective view, and (b) an enlarged view of a joint portion. A second embodiment of the frame structure 1 will be described on the basis of FIG.

The frame structure 1 in the second embodiment is composed of a combination of parallel pipes 10a parallel to each axis and diagonal pipes 10b arranged diagonally with respect to the axis, and has a strong structure. ing.

FIG. 4 shows a third embodiment of the frame structure 1, where (a) is a plan view and (b) is a side view. A third embodiment of the frame structure 1 will be described on the basis of FIG.

The frame structure 1 in the third embodiment includes parallel pipes 10a parallel to each axis, diagonal pipes 10b arranged to form a polygonal outline, and brace pipes 10c forming braces. is a frame structure 1 having an octagonal prism shape. Various polyhedral structures can be selected for the frame structure 1 .

Various joining structures between the pipe 10 and the joint 20 will be described with reference to FIGS. 5 to 8. FIG.

FIG. 5 shows Example 1 of the joint structure. In Example 1, pipes 10 are joined to two orthogonal surfaces of a hexahedral (cube) joint 20 . It should be noted that the pipe connection hole 15 may be formed in the pipe 10 and the joint inserting portion 25 may be formed in the joint 20 as in the second embodiment shown in FIG.

FIG. 7 shows Example 3 of the joint structure, and is (a) a cross-sectional view and (b) a plan view of the joint. In Example 3, the joints 20 are hexahedrons (cubes) of hexahedral shapes in which 12 sides are largely chamfered, and the pipes 10 are joined to the surfaces 24 of the respective joints 20 . That is, it further has a connection hole 21 arranged along an axis between two of the three axes (X, Y, Z). As shown in FIG. 7, additional pipes 10 can be inserted into connecting holes 21 provided in the plane 24 thereof. Therefore, it is possible to form a frame structure with braces and to correspond to a frame structure having a strong and complicated structure.

FIG. 8 shows Example 4 of the joint structure. In Example 4, the wall surface 22 of the connection hole 21 of the joint 20 and the wall surface 12 of the insertion portion 11 of the pipe 10 are tapered surfaces having the same inclination angle. In such a structure, a carbon-based adhesion layer may be formed using a carbon-based adhesive, but close contact and strong bonding can be obtained without forming a carbon-based adhesion layer.

It should be noted that the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, numerical value, form, number, location, etc. of each component in the above-described embodiment are arbitrary and not limited as long as the present invention can be achieved.

The frame structure and furnace internals of the present invention are adaptable to the field of demand, being able to conform to individual shapes and retain their robust shape even in high temperature furnaces.

Reference Signs List 1 frame structure 10 pipe 10a parallel pipe 10b diagonal pipe 10c brace pipe 11 insertion portion 12 wall surface 15 pipe connection hole 20 joint 21 connection hole 22 wall surface 23 bottom 24 surface (plane)
25 joint insertion part 30 carbon-based adhesive

Claims (6)

a plurality of pipes made of carbon fiber reinforced carbon composite material; and a plurality of joints made of carbon-based material connecting the plurality of pipes ;
The pipe has an insertion portion, the joint has a connection hole for inserting the insertion portion,
The joint has two to six connection holes arranged along three mutually orthogonal axial directions, and is arranged along an axis sandwiched between any two of the three axes. frame structure further comprising connecting holes . A frame structure according to claim 1 , wherein said joints are made of graphite. The frame structure according to claim 1 or 2 , wherein the connection hole has a bottom. The frame structure according to any one of claims 1 to 3 , wherein the wall surface of the connection hole and the wall surface of the insertion portion of the pipe are tapered surfaces having the same inclination angle. The frame structure according to any one of claims 1 to 4 , wherein the pipe and the joint are joined with a carbon-based adhesive layer. A reactor internal member using the frame structure according to any one of claims 1 to 5 .

Images