JP7383250B2 - Layered fireproof plate structure and rocket landing pad - Google Patents

Description

The present invention relates to the structure of a fireproof plate , and more particularly to a fireproof plate structure that can be suitably used for rocket landing pads and the like. The present invention also relates to a rocket landing pad having such a fireproof plate structure.

In order to operate the space station effectively, a supply ship is necessary to transport personnel and supplies into space.

A rocket is required to send a supply ship into space, but a launch pad is required to launch the rocket. In addition, in recent years, rockets launched to send supply ships into space have been relaunched by landing on landing pads on land or at sea. Is required.

The launch pad has a part that is exposed to combustion gas when the rocket is launched, and the landing pad has a part that is exposed to the combustion gas from the reverse injection when the rocket lands. These parts need to be able to withstand extremely high temperatures and high-temperature gas fluids. For example, in Patent Document 1, as a deflection plate structure for a rocket launch pad, a large number of ceramic lining blocks are installed by grouting on a concrete substrate. A deflection plate structure is disclosed in which the polarizers are covered and laid next to each other.

Japanese Unexamined Patent Publication No. 197998/1983

High-performance rocket engines (liquid hydrogen/liquid oxygen engines), which have been under development in recent years, have higher combustion gas temperatures than conventional engines (said to reach around 3,600 degrees Celsius). There is a growing demand for high-performance fireproof plates , but the inventor believed that it would be difficult to prevent fireproof plates from being damaged at all because they are exposed to combustion gas at a higher temperature than in conventional engines, and therefore We thought it would be important to configure the fireproof plate structure so that only parts can be easily repaired or replaced.

However, in the deflection plate structure described in Patent Document 1, the ceramic lining block is attached to the concrete substrate with grout, and it is difficult to easily repair or replace the ceramic lining block in parts. .

Also, when exposed to combustion gas from a rocket engine, cooling water is applied to the fireproof plate , but the cooling water that is exposed to the combustion gas rapidly turns into water vapor, causing damage to the fireproof plate due to the sudden pressure increase. The inventor thought that there is a possibility.

The present invention has been made in view of these points, and provides a fireproof board that can be easily partially repaired or replaced, and is designed to allow water vapor generated by exposure to combustion gas to escape. The task is to provide structures and rocket landing pads.

The present invention is an invention to solve the above problems, and is a stacked fireproof plate structure and a rocket landing pad as described below.

That is, one aspect of the stacked fireproof plate structure according to the present invention is such that an upper fireproof plate , a lower fireproof plate located below the upper fireproof plate , and a predetermined distance between the upper fireproof plate and the lower fireproof plate are provided. This is a stacked fireproof board structure characterized by comprising a gap forming member that forms a gap.

In this application, regarding the stacked fireproof plate structure and its constituent members according to the present invention and embodiments of the present invention, when interpreting words that refer to upper and lower, such as upward and downward, the upper fireproof plate is on top and the lower fireproof plate is on the bottom. As such, it shall be interpreted based on the state in which the stacked fireproof plate structure according to the present invention and the embodiments of the present invention is placed on a horizontal surface. The same applies to other parts of the present application.

Each part of the upper fireproof board may be made of a material with the same composition, and each part of the lower fireproof board may be made of a material with the same composition.

At least one of the upper fireproof plate and the lower fireproof plate may be made of a material that can be formed into a flat plate by pouring into a mold and casting.

The upper fireproof plate may have a thickness of 100 mm or more and 200 mm or less, and the predetermined distance between the gaps formed by the gap forming member may be 50 mm or more and 100 mm or less.

At least one of the upper fireproof plate and the lower fireproof plate may include a bottom steel plate attached to a lower surface.

A slip stopper may be attached to the upper surface of the bottom steel plate.

The gap forming member may be a plurality of shaped steels attached to the lower surface of the upper fireproof plate and arranged at predetermined intervals in a direction parallel to the lower face of the upper fireproof plate .

Here, "attached to the lower surface of the upper fireproof plate " refers not only to the case where it is directly attached to the lower surface of the upper fireproof plate , but also to the case where it is indirectly attached to the lower surface of the upper fireproof plate through another member. This also includes cases where it is installed. Similar statements elsewhere in this application shall be interpreted in the same manner.

Among the plurality of shaped steels constituting the gap forming member, some of the shaped steels are attached to the lower surface of the upper fireproof plate and are aligned with each other in a predetermined direction parallel to the lower face of the upper fireproof plate . The remaining section steels are arranged at intervals, and are attached to the lower surface of the upper fireproof plate and mutually in a direction parallel to the lower face of the upper fireproof plate and in a direction different from the fixed direction. They may be arranged at predetermined intervals.

The certain direction and the direction different from the certain direction may be substantially orthogonal directions.

A slip stopper embedded inside the upper fireproof plate may be attached to the upper surface of the shaped steel.

The upper refractory plate is configured to be divided into a plurality of upper refractory plate blocks in the in-plane direction, and the upper refractory plate blocks that are adjacent in the in-plane direction are arranged in close contact with each other. It's okay.

Here, the "in-plane direction" with respect to the upper fireproof plate refers to the direction in which the upper fireproof plate spreads in plane as a plate , and in normal cases, it is parallel to the upper and lower surfaces of the upper fireproof plate . It is the direction. The same applies to similar descriptions in other parts of the present application.

Furthermore, "the upper refractory board blocks that are adjacent in the in-plane direction are arranged closely together" means that there is substantially no gap between the upper refractory board blocks that are adjacent in the in-plane direction. This does not mean that the physical gap is zero. Similar statements elsewhere in this application shall be interpreted in the same manner.

The lower refractory plate is divided into a plurality of lower refractory plate blocks in the in-plane direction, and the lower refractory plate blocks that are adjacent in the in-plane direction are arranged at a predetermined interval. It may be configured as follows.

Here, the "in-plane direction" with respect to the lower fireproof plate refers to the direction in which the lower fireproof plate spreads in a plane as a plate -like body, and in normal cases, it is parallel to the upper and lower surfaces of the lower fireproof plate . It is the direction. The same applies to similar descriptions in other parts of the present application.

A lower spacer may be provided below the lower fireproof plate .

A restraining member may be provided to restrain the position of the upper fireproof plate .

At least one of the upper fireproof plate and the lower fireproof plate may be formed of castable refractory material.

One aspect of the rocket landing pad according to the present invention is a rocket landing pad characterized by comprising the above-mentioned stacked fireproof plate structure.

The rocket landing pad may be provided on a ship at sea.

According to the present invention, there is provided a fireproof plate structure and a rocket landing pad that can be easily partially repaired or replaced, and are designed to allow water vapor generated by exposure to combustion gas to escape. Can be done.

A plan view from above of a stacked fireproof board structure 10 according to an embodiment of the present invention Vertical cross-sectional view of the stacked fireproof plate structure 10 (cross-sectional view taken along the line II-II in FIG. 1) Enlarged vertical cross-sectional view of part III in Figure 2 Horizontal sectional view of the upper fireproof plate 20 (IV-IV line sectional view in FIG. 2) Vertical cross-sectional view of the upper fireproof plate 20 (cross-sectional view taken along the line VV in FIG. 4) Enlarged vertical cross-sectional view of the VI section in Figure 3 Horizontal cross-sectional view of the lower fireproof plate 30 (cross-sectional view taken along the line VII-VII in FIG. 2) Vertical cross-sectional view of the lower fireproof plate 30 (cross-sectional view taken along line VIII-VIII in FIG. 7) A vertical sectional view schematically showing a situation in which a stacked fireproof plate structure 10 is installed as a landing pad in a rocket landing facility 100.

Embodiments of the present invention will be described in detail below with reference to the drawings. In this explanation, the case where the stacked fireproof plate structure 10 according to the embodiment of the present invention is used for a rocket landing pad will be explained. It is not limited to the table.

(1) Configuration and effects of the stacked fireproof plate structure according to the embodiment of the present invention FIG. 1 is a plan view of the stacked fireproof plate structure 10 according to the embodiment of the present invention viewed from above, and FIG. 3 is an enlarged vertical cross-sectional view of the section III in FIG. 2 , and FIG . 5 is a horizontal cross-sectional view (cross-sectional view taken along the line IV--IV in FIG. 2), FIG. 5 is a vertical cross-sectional view (cross-sectional view taken along the line V-V in FIG. 4) of the upper fireproof plate 20, and FIG. 7 is a horizontal sectional view of the lower fireproof plate 30 (cross-sectional view taken along line VII-VII in FIG. 2); FIG. 8 is a vertical sectional view of the lower fireproof plate 30; FIG. (A sectional view taken along the line VIII-VIII in FIG. 7), and FIG. 9 is a vertical sectional view schematically showing a situation in which the stacked fireproof plate structure 10 is installed as a landing pad in the rocket landing facility 100. For convenience of illustration, in FIG. 1, only the outline of the lower fireproof plate 30 is shown as a hidden line (dashed line) for the portion below the upper fireproof plate 20, and FIGS. In the vertical cross-sectional view of No. 8, the contour line in the background at a portion other than the end face is indicated by a broken line. Further, in FIG. 4, only the web is depicted for the inter-plate spacer 24, and in FIG. 7, only the web is depicted for the lower spacer 34. Moreover, the enlarged vertical cross-sectional view of FIG. 6 depicts a state in which the upper fireproof board blocks 20A adjacent in the in-plane direction are spaced apart from each other by a small distance in the in-plane direction.

The stacked fireproof plate structure 10 according to the first embodiment includes an upper fireproof plate 20, a lower fireproof plate 30, an inter-plate spacer 24, and a lower spacer 34 . 30 is a two-stage fireproof plate structure supported from below via an inter-plate spacer 24.

The upper fireproof plate 20 has a role of receiving the retro-injected combustion gas 104 when the rocket 102 lands, and the upper fire-resistant plate 20 receives the retro-injected combustion gas 104 when the rocket 102 lands. Since the upper fireproof plate 20 is supported from below by the lower fireproof plate 30 which has the rigidity to support the upper fireproof plate 20 from below, the weight of the rocket 102 after landing is mainly supported by the lower fireproof plate 30. Ru.

The upper fireproof board 20 is divided into a plurality of upper fireproof board blocks 20A. Upper bottom steel plates 22 that match the size of the upper fireproof plate block 20A are attached to the lower surface of the upper fireproof plate block 20A, and constitute a part of the upper fireproof plate block 20A. The thickness of the upper bottom steel plate 22 is approximately 3 to 12 mm. The provision of the upper bottom steel plate 22 may be omitted depending on the usage conditions of the stacked fireproof plate structure 10 according to the embodiment of the present invention. Furthermore, a corner protection steel material 20B is attached to the corner on the lower surface side of the upper fireproof plate block 20A. For example, L-shaped steel can be used as the corner protection steel material 20B.

The upper fireproof plate blocks 20A that are adjacent to each other in the in-plane direction are arranged in close contact with each other without any gaps, so that the back-injected combustion gas 104 when the rocket 102 lands does not leak downward. In this embodiment, nine upper fireproof plate blocks 20A, which are flat block bodies made of a fire-resistant material, are connected in the in-plane direction without any gaps, and the reverse direction when the rocket 102 lands is Receives the injected combustion gas 104. As shown in FIG. 6, the side surface of the corner protection steel material 20B and the side surface of the upper fireproof plate 20 form a vertical plane with no step, and the upper fireproof plate blocks 20A that are adjacent to each other in the in-plane direction are in close contact with each other without any gaps. It is now possible to place the

The thickness of the upper fireproof plate 20 (upper fireproof plate block 20A) is typically 100 mm to 100 mm from the viewpoint of receiving the back-injected combustion gas 104 when the rocket 102 lands and from the viewpoint of handling (particularly handling when replacing). It is about 200mm. Further, from the viewpoint of ease of handling (particularly ease of handling during replacement) and ease of manufacture, the size of the upper fireproof plate block 20A in the in-plane direction is typically about 1000 to 2000 mm.

When the stacked fireproof plate structure 10 is used for the landing pad of the rocket 102, the upper fireproof plate 20 (upper fireproof plate block 20A) of the stacked fireproof plate structure 10 directly receives the back-injected combustion gas 104 when the rocket 102 lands. The fireproof board 20 (upper fireproof board block 20A) is required to have high heat resistance. The material of the upper fireproof plate 20 (upper fireproof plate block 20A) is not particularly limited as long as it can exhibit the necessary fireproof performance, etc., and specifically, for example, alumina, Magnesia, chromium oxide, zirconia, etc. can be used for the upper fireproof board 20 (upper fireproof board block 20A). The upper fireproof board 20 (upper fireproof board block 20A) is easy to handle when manufacturing the upper fireproof board 20 (upper fireproof board block 20A) as a block body, has good workability at the time of repair, and is also cost effective . As the material of 20A), castable refractories (lightweight aggregate with high fire resistance mixed with alumina cement) can be suitably used.

The upper fireproof plate 20 is made of a single material. The term "single material" here means that each part of the upper fireproof plate 20 is made of a material with the same composition, and does not exclude materials made by mixing multiple types of fireproof materials. . Since the upper fireproof plate 20 is made of a single material, it can be repaired using the single material when it is damaged, and there is no need to use multiple materials or members, making it easy to repair. It can be carried out. For example, when the upper fireproof plate 20 is formed of castable refractory, damaged parts (for example, parts scraped off by the back-injected combustion gas 104 of the rocket 102) may be repaired with the castable refractory. Repairs using castable refractories can be performed by packing castable refractories into damaged areas (such as scraped areas) and filling the scraped areas with castable refractories. In addition, if safety can be confirmed, it is also possible to repair with a fireproof material different from the fireproof material used when initially forming the upper fireproof board 20.

Furthermore, since the upper fireproof plate 20 is composed of a plurality of upper fireproof plate blocks 20A that are arranged closely in the in-plane direction without any gaps, it is not necessary to repair the upper fireproof plate blocks 20A that are severely damaged. Instead, it is possible to deal with damage by replacing it.

From the viewpoint of reducing the cost of replacing the upper fireproof plate 20, the upper fireproof plate 20 is preferably made of a material that can be manufactured at low cost, and more preferably, it is formed into a flat plate by pouring it into a steel formwork . It is preferable to use a material that can be formed into a shape, that is, the above-mentioned castable refractory (a mixture of lightweight aggregate with high fire resistance and alumina cement). Thereby, the upper fireproof plate 20 can be easily manufactured, and the cost of replacing the upper fireproof plate 20 can be reduced.

As described above, the upper bottom plate steel plate 22 is attached to the lower surface of the upper fireproof plate block 20A of the upper fireproof plate 20 and constitutes a part of the upper fireproof plate block 20A. When the plate structure 10 is used as a landing pad for a rocket 102, water is sprayed to cope with the back-injected combustion gas 104 during landing, so the upper bottom steel plate 22 is provided with a predetermined interval to provide an escape route for water and steam. It is preferable to provide a through hole with a diameter of about 20 mm. It is standard that the through holes are provided at a pitch of about 100 to 200 mm. When providing through holes in the upper bottom steel plate 22, the size, pitch, and shape of the through holes may be appropriately set depending on the conditions under which the stacked fireproof plate structure 10 is used. Further, it is not essential to provide the through holes in the upper bottom steel plate 22, and depending on the conditions under which the stacked fireproof plate structure 10 is used, they may not be provided. In addition, when forming the upper fireproof plate 20 with a castable refractory, the upper bottom plate steel plate 22 can also be used as a formwork.

In addition, by attaching a slip prevention member (not shown) to the upper surface of the upper bottom steel plate 22 and embedding the slip prevention member inside the upper fireproof plate 20, the upper fireproof plate 20 and the upper bottom steel plate 22 can be separated. It is also possible to improve the load-bearing capacity of the upper fireproof plate 20 by improving the degree of integration. In this case, it is possible to obtain the necessary load-bearing capacity even if the thickness of the upper fireproof plate 20 is reduced to a certain degree.

The plate spacer 24 is arranged between the upper fireproof plate 20 and the lower fireproof plate 30, and forms a gap of a predetermined distance between the upper fireproof plate 20 and the lower fireproof plate 30 to prevent water and water vapor. It has the role of creating an escape route for people. Therefore, it can be said that the inter-plate spacer 24 is a gap forming member. In order to allow a sufficient amount of water and steam to pass between the upper fireproof plate 20 and the lower fireproof plate 30, the size of the gap between the upper fireproof plate 20 and the lower fireproof plate 30 is set to a standard size. The length should be about 50 to 100 mm. Therefore, the height of the inter-plate spacer 24 in the vertical direction is typically about 50 to 100 mm. Further, by providing the above-mentioned gap between the upper fireproof plate 20 and the lower fireproof plate 30 by the plate spacer 24, it becomes easier to replace the upper fireproof plate 20 if it is damaged.

As the inter-plate spacer 24, a shaped steel having a height of about 50 to 100 mm is usually used, and specifically, for example, an L-shaped steel or a channel steel having a height of about 50 to 100 mm is used. In the stacked fireproof plate structure 10 according to this embodiment, as shown in FIGS. 2, 3, and 5, L-shaped steel is used as the inter-plate spacer 24.

In FIG. 4, the web of the inter-plate spacer 24, which is an L-shaped steel, is shown by a broken line, but as shown in FIGS. 2 to 5, in this embodiment, the inter - plate spacer 24 is It is attached by welding to the lower surface of the inner end along the four sides of the substantially square, and is attached to the lower surface of the in-plane center of the upper bottom steel plate 22 (at the position where the substantially square is divided into four substantially squares). They are attached by welding so that they are perpendicular to each other.

The inter- plate spacers 24 are placed in contact with one side of the upper fireproof plate 20 (the lower surface of the upper bottom steel plate 22) at a predetermined distance from each other. It has the role of forming a gap of a predetermined distance with the lower fireproof plate 30 to create an escape route for cooling water and steam below the upper fireproof plate 20 (upper fireproof plate block 20A). Therefore, it is preferable to provide through holes in the web of the inter-plate spacer 24 so that the cooling water and water vapor can escape. In addition, the plate spacer 24 is attached by welding to the lower surface of the upper bottom steel plate 22 as described above, and reinforces the upper bottom steel plate 22 . 20 has been reinforced as a whole. By attaching an anti-slip member (not shown) to the upper surface of the inter-board spacer 24 and embedding the anti-slip member inside the upper fireproof board 20, the upper fireproof board 20 and the inter-board spacer 24 can be integrated. The reinforcing effect of the inter-plate spacer 24 may be further improved by increasing the degree of .

As mentioned above, the upper fireproof plate blocks 20A that are adjacent to each other in the in-plane direction are arranged in close contact with each other without any gaps, but their positions do not shift even when they receive the back-injected combustion gas 104 when the rocket 102 lands. In order to achieve this, as shown in FIG. 6, a convex portion 24X is provided on one web of the inter-plate spacers 24 adjacent in the in-plane direction, and a through hole 24Y is provided on the other web, so that the convex portion 24X fits into the through hole 24Y.

Moreover, not only do upper fireproof plate blocks 20A adjacent to each other in the in-plane direction not shift from each other, but also so that the entire upper fireproof plate 20 configured by combining nine upper fireproof plate blocks 20A does not float up. In order to control the overall position of the upper fireproof plate 20, a cable (wire rope) not shown is attached to the web of the inter-plate spacer 24, and this cable (wire rope) is fixed to an external fixed object. It may also be restricted.

The lower fireproof plate 30 has a role of supporting the upper fireproof plate 20 from below, and has the rigidity to support the upper fireproof plate 20 from below. When the stacked fireproof plate structure 10 is used, for example, as a landing pad for a rocket 102, the weight of the rocket 102 is directly applied to the upper fireproof plate 20 of the stacked fireproof plate structure 10, so the upper fireproof plate 20 is strongly supported from below. It becomes necessary. In this case, the lower fireproof plate 30 is required to have considerably high rigidity, so the thickness of the lower fireproof plate 30 is thick, and the lower spacer 34 disposed below the lower fireproof plate 30 has an H shape. It uses steel.

The lower fireproof board 30 is constructed by connecting four lower fireproof board blocks 30A, which are flat block bodies made of a fire-resistant material, in the in-plane direction. It has a supporting role. As described above, in order to use the stacked refractory plate structure 10 as a landing pad for a rocket 102, for example, the lower refractory plate 30 needs to have considerably high rigidity. Therefore, the thickness of the lower fireproof plate 30 (lower fireproof plate block 30A) is increased, and the thickness of the lower fireproof plate 30 (lower fireproof plate block 30A) is typically about 200 to 300 mm. Further, from the viewpoint of ease of handling and ease of manufacture, the size of the lower fireproof board block 30A in the in-plane direction is typically about 2000 to 3000 mm.

A lower bottom steel plate 32 corresponding to the size of the lower fireproof plate block 30A is attached to the lower surface of each lower fireproof plate block 30A constituting the lower fireproof plate 30. The thickness of the lower bottom steel plate 32 is approximately 3 to 12 mm. The lower bottom steel plate 32 may be omitted depending on the usage conditions of the stacked fireproof plate structure 10 according to the embodiment of the present invention. Further, a corner protection steel material 30B is attached to the corner on the lower surface side of the lower fireproof plate block 30A. For example, L-shaped steel can be used as the corner protection steel material 30B.

Furthermore, when the stacked fireproof plate structure 10 is used, for example, as a rocket landing pad, the upper fireproof plate 20 of the stacked fireproof plate structure 10 directly receives the back-injected combustion gas 104 when the rocket 102 lands, so the lower fireproof plate 30 Although it does not directly receive the back-injected combustion gas 104 when the rocket 102 lands, it receives the heat that has passed through the upper fireproof plate 20, so the lower fireproof plate 30 is also required to have heat resistance. In addition, the lower fireproof plate 30 is required to have heat resistance from the viewpoint of ensuring safety even if a through hole is formed in the upper fireproof plate 20 due to the back-injected combustion gas 104 when the rocket 102 lands. Ru.

As shown in FIGS. 1 and 3, lower fireproof plate blocks 30A adjacent in the in-plane direction are arranged with a predetermined gap (for example, a gap of about 100 mm); The plate blocks 30A are connected to each other via a lower spacer 34. The predetermined gap provided between the lower fireproof plate blocks 30A adjacent to each other in the in-plane direction serves as an escape route for cooling water and water vapor, and also contributes to reducing the weight of the lower fireproof plate 30 as a whole.

The material of the lower fireproof plate 30 (lower fireproof plate block 30A) is not particularly limited as long as it can exhibit the necessary fireproof performance, etc., and specifically, for example, alumina, Magnesia, chromium oxide, zirconia, etc. can be used for the lower fireproof plate 30 (lower fireproof plate block 30A). The lower fireproof plate 30 (lower fireproof plate block 30A) is easy to handle when fabricated as a block body, has good workability during repair, and is cost-effective. As the material constituting 30A), castable refractories (lightweight aggregate with high fire resistance mixed with alumina cement) can be suitably used.

The lower fireproof plate 30 is made of a single material. The term "single material" here means that each part of the lower fireproof plate 30 is made of a material with the same composition, and is not intended to exclude materials made by mixing multiple types of fireproof materials. . Since the lower fireproof plate 30 is made of a single material, it can be repaired using the single material when it is damaged, and there is no need to use multiple materials or members, making it easy to repair. It can be carried out. For example, when the lower fireproof plate 30 is formed of castable refractory, damaged parts (for example, parts scraped off by the back-injected combustion gas 104 of the rocket 102) may be repaired with the castable refractory. Repairs using castable refractories can be performed by packing castable refractories into damaged areas (such as scraped areas) and filling the scraped areas with castable refractories. In addition, if safety can be confirmed, it is also possible to repair with a fireproof material different from the fireproof material used when initially forming the lower fireproof board 30.

Furthermore, since the lower fireproof board 30 is composed of a plurality of lower fireproof board blocks 30A arranged in the in-plane direction, the lower fireproof board block 30A that is severely damaged should be replaced rather than repaired. This also allows you to respond to damage.

As described above, the lower bottom steel plate 32 is attached to the lower surface of the lower fireproof plate 30, but when the stacked fireproof plate structure 10 according to this embodiment is used for the landing pad of the rocket 102, the flames of the reverse jet during landing Since water is sprayed to cope with this, it is preferable that through holes with a diameter of about 20 mm are provided at predetermined intervals in the lower bottom steel plate 32 to provide an escape route for water and steam. It is standard that the through holes are provided at a pitch of about 100 to 200 mm. When providing through holes in the lower bottom steel plate 32, the size, pitch, and shape of the through holes may be appropriately set depending on the conditions under which the stacked fireproof plate structure 10 is used. Further, it is not essential to provide a through hole in the lower bottom steel plate 32, and it may not be provided depending on the conditions under which the stacked fireproof plate structure 10 is used. In addition, when forming the lower fireproof plate 30 with a castable refractory, the lower bottom plate steel plate 32 can also be used as a formwork.

In addition, a reinforcing steel material 32A (L-beam steel) that also serves as a slip prevention member is welded to the in-plane center portion of the upper surface of the lower bottom steel plate 32 of each lower fireproof plate block 30A (at the position where a substantially square is divided into four substantially squares). The reinforcing steel material 32A is embedded inside the lower fireproof plate 30. This reinforces the lower bottom steel plate 32 and improves the degree of integration between the lower fireproof plate 30 and the lower bottom steel plate 32. In this case, it is possible to obtain the necessary load-bearing capacity even if the thickness of the lower fireproof plate 30 is reduced to a certain degree.

The lower spacer 34 is disposed below the lower fireproof plate 30 and has the role of creating an escape route for water and steam. In order to allow a sufficient amount of water and steam to pass under the lower fireproof plate 30, the size of the gap below the lower fireproof plate 30 is typically about 100 mm. Therefore, the vertical height of the lower spacer 34 is typically about 100 mm.

As mentioned above, the thickness of the lower fireproof plate 30 is typically about 200 to 300 mm, and when the stacked fireproof plate structure 10 is used, for example, as a landing pad for a rocket, it is necessary to support the weight of the rocket. As the lower spacer 34, a steel material having a height of about 100 mm is usually used, and specifically, for example, an H-beam steel material having a height of about 100 mm is used. In the stacked fireproof plate structure 10 according to this embodiment, as shown in FIGS. 2, 3, and 8, H-beam steel is used as the lower spacer 34.

In FIG. 7, the web of the lower spacer 34, which is an H-shaped steel, is shown by a broken line, but as shown in FIGS. 2, 3, 7, and 8, in this embodiment, the lower spacer 34 is It is attached by welding to the lower surface of the steel plate 32 at a position about 1/4 of the length of one side from each of the four sides of a substantially square shape, and is attached by welding so as to form a rectangular shape.

The lower spacers 34 are arranged in contact with one side (lower surface) of the lower fireproof board 30 at a predetermined interval from each other, and as described above, the lower fireproof board 30 (lower fireproof board block 30A) Its role is to create an escape route for cooling water and steam below. In addition, the lower spacer 34 is attached by welding to the lower surface of the lower bottom steel plate 32 as described above, and reinforces the lower bottom steel plate 32. By reinforcing the lower bottom steel plate 32, the lower fireproof plate 30 It reinforces the whole thing. Furthermore, by attaching a slip prevention member (not shown) to the upper surface of the lower spacer 34 and embedding the slip prevention member inside the lower fireproof plate 30, the lower fireproof plate 30 and the lower spacer 34 are integrated. The reinforcing effect of the lower spacer 34 may be further improved by increasing the degree of .

As mentioned above, lower fireproof plate blocks 30A adjacent in the in-plane direction are arranged with a predetermined gap (for example, a gap of about 100 mm), but lower fireproof plate blocks 30A adjacent in the in-plane direction are arranged with a predetermined gap (for example, a gap of about 100 mm). , 2, 3, 7, and 8, they are connected via a lower spacer 34, and the lower spacer 34 also serves to connect the lower fireproof plate blocks 30A adjacent in the in-plane direction. have As shown in FIG. 3, the lower spacers 34 attached below the lower fireproof plate blocks 30A arranged adjacent to each other in the in-plane direction bridge the webs of the lower spacers 34 made of H-shaped steel. These webs are connected via a connecting plate 34X attached to the web with bolts 34Y. The predetermined gap provided between the lower fireproof board blocks 30A adjacent to each other in the in-plane direction contributes to reducing the weight of the entire lower fireproof board 30, and also serves as an escape route for cooling water and water vapor.

Note that the lower spacer 34 has the role of creating an escape route for cooling water and water vapor below the lower fireproof board 30 (lower fireproof board block 30A), but the stacked fireproof board structure 10 according to the embodiment of the present invention Depending on the usage conditions, it is not essential to create an escape route for cooling water and water vapor below the lower fireproof plate 30 (lower fireproof plate block 30A), and depending on the usage conditions, the lower spacer 34 can be omitted. However, when the lower spacer 34 is omitted, it is necessary to connect the lower fireproof plate blocks 30A to each other in the in-plane direction by other means.

(2) Application of the stacked fireproof plate structure 10 to a landing pad As described above, the stacked fireproof plate structure 10 according to the embodiment of the present invention has a two-layer fireproof plate structure in which the upper fireproof plate 20 is placed on the lower fireproof plate 30. It has a fireproof plate structure with a tiered structure , and an escape route for cooling water and water vapor is provided between the upper fireproof plate 20 and the lower fireproof plate 30, and the water vapor generated by exposure to combustion gas is removed. It has a fireproof board structure that takes into account the escape of fire, and has excellent fire resistance performance. Further, a lower spacer 34 having a certain height is provided below the thick lower fireproof plate 30 to support it from below, and has sufficient rigidity to support the load of the rocket 102. There is.

Therefore, the stacked fireproof plate structure 10 according to the embodiment of the present invention can be suitably used as a landing pad for the rocket 102 in the rocket landing facility 100.

Further, in the stacked fireproof board structure 10 according to the embodiment of the present invention, the thickness and in-plane size of the upper fireproof board block 20A and the lower fireproof board block 30A can be changed as appropriate, and the stacked fireproof board structure 10 can be arranged in the in-plane direction. The number of them can also be adjusted as appropriate, so when using the stacked fireproof plate structure 10 according to the embodiment of the present invention as a landing pad for a rocket 102, the landing pad can be appropriately adjusted depending on the target rocket 102. It can be made into a fireproof structure, and the overall weight can be reduced. Therefore, the landing pad using the stacked fireproof plate structure 10 according to the embodiment of the present invention can be easily installed on a marine vessel such as a barge. Therefore, the stacked fireproof plate structure 10 according to the embodiment of the present invention can be suitably used as a landing pad for a rocket at sea.

10...Layered fireproof board structure 20...Upper fireproof board
20A...Upper fireproof plate block 20B, 30B...Corner protection steel material 22...Upper bottom plate steel plate 24...Spacer between plates 24X...Convex portion 24Y...Through hole 30...Lower fireproof plate
30A...Lower fireproof plate block 32...Lower bottom plate steel plate 32A...Reinforcement steel material 34...Lower spacer 34X...Joint plate 34Y...Bolt 100...Rocket landing facility 102...Rocket 104...Reverse injection combustion gas

Claims (13)

an upper fireproof plate;
a lower fireproof plate located below the upper fireproof plate;
a gap forming member that forms a gap of a predetermined distance between the upper fireproof plate and the lower fireproof plate;
Equipped with
At least one of the upper fireproof plate and the lower fireproof plate includes a bottom steel plate attached to a lower surface,
The lower refractory plate is configured by being divided into a plurality of lower refractory plate blocks in the in-plane direction, and the lower refractory plate blocks that are adjacent in the in-plane direction are arranged at a predetermined interval. Features a layered fireproof board structure. 2. At least one of the upper fireproof plate and the lower fireproof plate is made of a material that can be formed into a flat plate by pouring and casting into a formwork. Layered fireproof board structure. The upper fireproof plate has a thickness of 100 mm or more and 200 mm or less, and the predetermined distance between the gaps formed by the gap forming member is 50 mm or more and 100 mm or less. Layered fireproof board structure. The stacked fireproof plate structure according to any one of claims 1 to 3, wherein a slip stopper is attached to the upper surface of the bottom steel plate. The gap forming member is a plurality of shaped steels attached to the lower surface of the upper fireproof plate and arranged at predetermined intervals in a direction parallel to the lower face of the upper fireproof plate. The layered fireproof plate structure according to any one of claims 1 to 4. Among the plurality of shaped steels constituting the gap forming member, some of the shaped steels are attached to the lower surface of the upper fireproof plate and are aligned with each other in a predetermined direction parallel to the lower face of the upper fireproof plate. The remaining section steels are arranged at intervals, and are attached to the lower surface of the upper fireproof plate and mutually in a direction parallel to the lower face of the upper fireproof plate and in a direction different from the fixed direction. The stacked fireproof board structure according to claim 5, wherein the stacked fireproof boards are arranged at predetermined intervals. 7. The stacked fireproof plate structure according to claim 6, wherein the certain direction and the direction different from the certain direction are substantially orthogonal directions. The upper refractory plate is configured by being divided into a plurality of upper refractory plate blocks in the in-plane direction, and the upper refractory plate blocks that are adjacent in the in-plane direction are arranged in close contact with each other. The layered fireproof board structure according to any one of claims 1 to 7. 9. The stacked fireproof plate structure according to claim 1, further comprising a lower spacer below the lower fireproof plate. The stacked fireproof board structure according to any one of claims 1 to 9 , further comprising a restraining member that restrains the position of the upper fireproof board. The stacked fireproof plate structure according to any one of claims 1 to 10 , wherein at least one of the upper fireproof plate and the lower fireproof plate is formed of a castable refractory. A rocket landing pad comprising the layered fireproof plate structure according to any one of claims 1 to 11 . 13. The rocket landing pad according to claim 12 , wherein the rocket landing pad is installed on a ship at sea.

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