Fireproof covering member for pipe insertion portion, fireproof covering structure, and fireproof covering method

Abstract

To provide a fire resistive covering member of a piping insertion part that can effectively and efficiently conduct fire resistive covering of the piping insertion part as compared to a conventional one, and a fire resistive covering structure and a fire resistive covering method.SOLUTION: A fire resistive covering member comprises an annular fire resistive covering material 11, and welding parts 121 fixed by welding pins 13 from an outer surface of the fire resistive covering material 11 and covering end surfaces of the fire resistive covering material 11. The welding pins 13 can be welded to the welding parts 121.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fire-resistant coating member for a pipe insertion portion, a fire-resistant coating structure, and a fire-resistant coating method, which are capable of providing fire-resistant coating to a pipe insertion portion of a steel beam or the like. [Background technology]

[0002] In order to prevent steel frame buildings from collapsing in the event of a fire, fire-resistant coating must be applied to the main structural components, such as columns, beams, supports, and pipe columns, to ensure the fire resistance time specified in the Building Standards Act.

[0003] For example, as a fire-resistant coating method for a steel beam for a through hole formed in the web of the steel beam, a conventional method involves wrapping a fire-resistant material around an internal core material such as a spiral duct cut to a predetermined length to produce a through sleeve material, and then installing the through sleeve material in the pipe insertion portion of the steel beam, as shown in FIG. 3A of Patent Document 1. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2015 / 060389 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the conventional through-sleeve materials described above are manufactured by wrapping a fire-resistant material around a hard inner core material such as a spiral duct, etc. Therefore, there is a problem that they are very bulky when transported from the manufacturing factory to the construction site and when transported within the construction site, and this also increases the transportation costs.

[0006] In addition, there have been cases where the inner diameter of the pipe insertion section of the steel beam that was actually drilled was slightly smaller than the design dimension, making it difficult to insert the through sleeve material manufactured to the designed outer dimensions into the pipe insertion section.

[0007] In view of the above problems, the present invention aims to provide a fire-resistant coating member, a fire-resistant coating structure, and a fire-resistant coating method for a pipe insertion part that can perform fire-resistant coating for a pipe insertion part more efficiently and effectively than conventional methods. [Means for solving the problem]

[0008] The invention related to (1) is a fire-resistant coating member for a pipe insertion portion, which comprises an annular fire-resistant coating material and a welded portion that is fixed to the outer surface of the fire-resistant coating material with a welding pin and covers the end surface of the fire-resistant coating material, and the welded portion is capable of being welded to the welding pin.

[0009] In the invention related to (2), the welded portion is formed at both ends of a support plate configured in an approximately U-shape, and the support plate is a fire-resistant coating member of a pipe insertion portion that extends between the ends of the fire-resistant coating material on the inner surface of the fire-resistant coating material.

[0010] The invention according to (3) is a fire-resistant covering member for a pipe insertion portion, in which the support plate is electrically connected to the steel material on which the pipe insertion portion is formed via the welding pin that fixes the support plate.

[0011] The inventions according to (4) and (5) are fire-resistant covering members for pipe insertion parts, in which the annular fire-resistant covering material is flexible and can be folded up to close the penetration part.

[0012] The inventions according to (6) to (9) are fire-resistant covering members for a pipe insertion portion, in which the welded portion can fix a fire-resistant covering material covering a steel material around the pipe insertion portion with the welding pin.

[0013] The inventions according to (10) to (17) are fire-resistant coating members for a pipe insertion portion, in which the annular fire-resistant coating material can be fixed to a steel material in which the pipe insertion portion is formed by a welding pin from the inside of the penetration portion.

[0014] The invention related to (18) is a fire-resistant covering structure comprising an annular fire-resistant covering material inserted into and fixed to a pipe insertion portion of a steel material, and a fire-resistant covering material covering the steel material around the annular fire-resistant covering material, wherein the annular fire-resistant covering material has a welded portion covering an end face of the annular fire-resistant covering material, and the fire-resistant covering material covering the steel material around the annular fire-resistant covering material can be fixed to the welded portion with a welding pin.

[0015] The invention according to (19) is a fire-resistant coating method characterized by comprising at least the steps of: preparing a fire-resistant coating member for a pipe insertion portion by fixing a substantially U-shaped support plate extending from one end face to the other end face of an annular fire-resistant coating material to the inner surface of the fire-resistant coating material from the outer surface of the fire-resistant coating material with a welding pin; and placing the fire-resistant coating member for the pipe insertion portion in the pipe insertion portion formed in a steel material, and electrically connecting the welding pin that fixes the support plate to the steel material.

[0016] The invention according to (20) is a fire-resistant coating method comprising the steps of covering the steel material around the pipe insertion portion with a fire-resistant coating material, and fixing the fire-resistant coating material covering the periphery of the pipe insertion portion to a welded portion at the end of the support plate with a welding pin. [Effects of the Invention]

[0017] According to the present invention, since a hard inner core material such as a spiral duct is not used, the fire-resistant covering member for the pipe insertion portion is not bulky as in the past, making it easier to transport and install, and reducing transportation costs. In addition, even if there is an error in the inner diameter dimension of the pipe insertion portion of the steel beam, the fire-resistant covering member can be easily installed.

[0018] Furthermore, the fire-resistant covering material that covers the steel material around the pipe insertion portion can be easily and reliably fixed to the welded portion formed on the support plate by the welding pin. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 2 is a front view of a fire-resistant covering member of a pipe insertion portion in an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of the fire-resistant covering member taken along the cross section AA in FIG. 1. [Figure 3] 1A and 1B are a front view and a side view of a support plate according to an embodiment of the present invention, and FIG. 1B is a perspective view showing another embodiment of the support plate. [Figure 4] FIG. 2 is an overall perspective view of a fire-resistant covering member installed in a pipe insertion portion of a steel beam in an embodiment of the present invention. [Figure 5] 5 is a front view of the fire-resistant covering member installed in the pipe insertion portion of the steel beam in part A of FIG. 4, and is a view illustrating a fixing manner of the fire-resistant covering member 10. FIG. [Figure 6] 5A and 5B are front views of a fire-resistant covering member installed in a pipe insertion portion of a steel beam in part A of FIG. 4, where (a) is a front view showing the state in which the fire-resistant covering member 10 has been completely fixed, and (b) is a CC cross-sectional view of (a). [Figure 7] FIG. 6 is a cross-sectional view of a steel beam and a fire-resistant covering member taken along the cross section BB in FIG. 5. [Figure 8] FIG. 2 is a front view showing a manner in which a fire-resistant covering material is fixed around a pipe insertion portion in an embodiment of the present invention. [Figure 9] 9 is a cross-sectional view of a steel beam, a fire-resistant covering material for the steel beam, and a fire-resistant covering member taken along the cross section DD of FIG. 8. FIG. [Figure 10] FIG. 3 is a front view showing a state in which a fire-resistant covering member of a pipe insertion portion is folded in an embodiment of the present invention. [Figure 11] 5 is a front view of another embodiment of the part C in FIG. 4. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. It should be noted that the present invention is not limited to the embodiment described below.

[0021] FIG. 1 shows a front view of a fire-resistant covering member 10 for a pipe insertion portion in this embodiment, and FIG. 2 shows a cross-sectional view of the fire-resistant covering member 10 taken along the line AA in FIG.

[0022] As shown in Figures 1 and 2, the fire-resistant coating member 10 of this embodiment includes a fire-resistant coating material 11 formed by connecting rock wool in a ring shape, and a plurality of support plates 12 (12a, 12b, 12c, 12d) that are fixed to the outer surface of the fire-resistant coating material 11 with welding pins 13 and extend between the ends of the fire-resistant coating material 11 on the inner surface of the fire-resistant coating material 11. As shown in Figure 3, etc., the support plates 12 (12a, 12b, 12c, 12d) are configured in a roughly U-shape and have welded portions 121 (121a, 121b, 121c, 121d) that cover the end faces of the fire-resistant coating material 11, and the welded portions 121 (121a, 121b, 121c, 121d) can be welded to the welding pins 13 (13a, 13b, 13c, 13d).

[0023] More specifically, the fire-resistant covering material 11, which is made by connecting rock wool in a ring shape, is formed to a size that corresponds to the inner diameter of the pipe insertion hole drilled in the steel beam. For example, the ring-shaped fire-resistant covering material 11 can be formed by rolling a single piece of fire-resistant covering material cut to the required size into a ring shape, overlapping the ends, and fixing the overlapped portion to a support plate 12 (described later) with a welding pin 13.

[0024] In addition, a plurality of support plates 12 (12a, 12b, 12c, 12d) are arranged on the inner surface of the fire-resistant covering material 11, extending between the ends of the fire-resistant covering material 11, and in this embodiment, four support plates 12 (12a, 12b, 12c, 12d) are arranged above, below, left and right as shown in the figure.

[0025] As shown in FIG. 3(a), the support plate 12 (12a, 12b, 12c, 12d) of this embodiment is formed in a roughly U-shape and is a plate-like metal member with a length of 200 mm and a thickness of 0.8 mm. More specifically, it has a plate-like portion 122 extending like a plate, and welded portions 121 (121a, 121b, 121c, 121d) are formed at both ends of the plate-like portion 122 to cover the end faces of the fire-resistant covering material 11. As shown in FIG. 2, the fire-resistant covering material 11 is placed in the roughly U-shaped recess and fixed with three welding pins 13 from the outer surface of the fire-resistant covering material 11.

[0026] As described above, the annular fire-resistant covering material 11 is flexible, so it is possible to close the penetration portion 20 and fold up the fire-resistant covering member 10 as shown in Fig. 10. Therefore, it is not bulky like conventional penetration sleeve materials, and transportation costs can be significantly reduced.

[0027] Furthermore, even if the inner diameter of the pipe insertion portion of the steel beam 100 that has actually been drilled is smaller than the design dimension, the fire-resistant covering member 10 can be easily attached.

[0028] Next, FIG. 4 shows an overall perspective view of the fire-resistant covering member 10 installed in the pipe insertion portion of the steel beam 100, and FIG. 5 shows a front view of the fire-resistant covering member 10 installed in the pipe insertion portion of the steel beam 100 at part A in FIG. 4. Furthermore, FIGS. 6(a) and 6(b) show a manner in which the fire-resistant covering member 10 is fixed at part A in FIG. 4. That is, the fire-resistant covering member 10 fabricated as described above is inserted into the pipe insertion portion, and a welding pin 13 is inserted as shown in FIG. 5. Then, as shown in FIGS. 6(a) and 6(b), the welding pin 13 is welded to the web 101 of the steel beam 100 and fixed. This allows the initially folded fire-resistant covering member 10 to be firmly fixed in place, conforming to the shape of the pipe insertion portion.

[0029] 7 shows the B-B cross section of FIG. 5, in which welding pins 13 that secure the support plates 12 (12a, 12b, 12c, 12d) are placed in pipe insertion portions formed in the webs 101 of the steel beams 100, bringing the steel beams 100 into contact with the welding pins 13. More specifically, one support plate 12 (12a, 12b, 12c, 12d) and the annular fire-resistant covering material 11 are secured with three welding pins 13, and the head of the central welding pin 13 is brought into contact with the webs 101 of the steel beams 100. This electrically connects the steel beams 100 and the support plates 12 (12a, 12b, 12c, 12d).

[0030] Next, Fig. 8 is a front view of part C in Fig. 4, showing a manner in which the fire-resistant covering material 200 is fixed to the steel beam 100 around the pipe insertion portion. Furthermore, Fig. 9 shows a cross-sectional view of the steel beam 100, the fire-resistant covering material 200 for the steel beam 100, and the fire-resistant covering member 10, taken along the line DD in Fig. 8. First, as shown in part A in Fig. 4, the fire-resistant covering member 10 is installed in the pipe insertion portion of the steel beam 100, and then the steel beam 100 around the pipe insertion portion is covered with the fire-resistant covering material 200.

[0031] Then, cross-shaped cuts are made in the fire-resistant covering material 200 covering the steel beam 100 at locations corresponding to the penetration portions 20 of the fire-resistant covering member 10, as shown in part B of Fig. 4, and the fire-resistant covering material 200 is cut out in a circular shape to fit the penetration portions 20. Next, as shown in Figs. 8 and 9, the welding pins 13 (13a, 13b, 13c, 13d) are inserted into the fire-resistant covering material 200 and welded to the weld portions 121 (121a, 121b, 121c, 121d) of the support plates 12 (12a, 12b, 12c, 12d) to fix the fire-resistant covering material 200. In this way, since the steel beam 100 and the support plate 12 (12a, 12b, 12c, 12d) are electrically connected as described above, it is possible to very easily and reliably firmly fix the fire-resistant coating material 200 covering the steel beam 100 to the fire-resistant coating member 10.

[0032] (Other embodiments) Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and the following modifications are also possible, for example.

[0033] The fire-resistant covering member 10 described above includes four support plates 12 (12a, 12b, 12c, 12d), but this is not necessarily limited to this, and as shown in Fig. 11, it is possible to fasten the fire-resistant covering material 200 and the fire-resistant covering member 10 together using three support plates 12 and three welding pins 13. Of course, it is also possible to fasten the fire-resistant covering material 200 and the fire-resistant covering member 10 together using three or fewer support plates 12 or five or more welding pins 13.

[0034] Furthermore, the form of the support plate 12 is not limited to that shown in Fig. 3(a). For example, as shown in Fig. 3(b), it is also possible to configure the plate-shaped portion 122 of the support plate 12 and the welded portion 121 as separate bodies, and to insert and fix the plate-shaped portion 122 into an insertion portion 1211 formed in the welded portion 121.

[0035] That is, the support plate 12 shown in Fig. 3(a) needs to be prefabricated in a factory according to the length of the fire-resistant covering member 10. On the other hand, if configured as shown in Fig. 3(b), it is only necessary to cut the plate-shaped portion 122 according to the length of the fire-resistant covering member 10, and the welded portion 121 can be used in common regardless of the length of the fire-resistant covering member 10. Therefore, the versatility of the support plate 12 can be improved and manufacturing costs can be reduced.

[0036] In the above-described embodiment, a form in which the fire-resistant covering member 10 is installed in the pipe insertion portion of the steel beam 100 is shown, but the fire-resistant covering member 10 of the present invention is not necessarily limited to use in the pipe insertion portion of the steel beam 100, and can also be used in the pipe insertion portion formed in a steel material other than the steel beam 100.

[0037] 1 to 3 show dimensions (mm), but these are merely examples and can be changed as appropriate depending on the size of the pipe insertion portion of the steel beam 100.

[0038] Although the embodiments of the present invention have been described above with reference to the drawings, the specific configurations are not limited to these embodiments. The scope of the present invention is defined by the claims rather than the description of the above embodiments, and includes all modifications within the meaning and scope of the claims. Furthermore, the specific methods described in the above examples can be modified within the scope of solving the problems of the present invention. [Explanation of symbols]

[0039] 10 Fire-resistant covering materials 11 Fireproof cladding 12(12a, 12b, 12c, 12d) Support plate 13(13a, 13b, 13c, 13d) Welding pin 20 Penetration 100 Steel beams 101 Web 121(121a, 121b, 121c, 121d) Welded section 200 Fireproof coating for steel beams

Claims

1. A fire-resistant covering member that is inserted into a pipe insertion portion formed in a steel material and fixed to the steel material, an annular fire-resistant covering; a plurality of support plates extending between the ends of the annular fire-resistant covering on the inner surface of the annular fire-resistant covering; the support plate is formed in a substantially U-shape and has welded portions at both ends of the support plate that cover a portion of an end surface of the annular fire-resistant covering material, The annular fire-resistant covering is secured to the support plate by a first weld pin from an outer surface of the annular fire-resistant covering. A fire-resistant covering member for a pipe insertion portion.

2. The support plate is electrically connected to the steel material to which the annular fire-resistant covering member having the pipe insertion portion formed thereon is fixed via a first welding pin that fixes the annular fire-resistant covering member from the outer surface. The fire-resistant covering member for a pipe insertion portion according to claim 1.

3. The annular fire-resistant covering material is flexible and can be folded up to close the penetration. The fire-resistant covering member for a pipe insertion portion according to claim 1 or 2.

4. A fire-resistant coating material covering the steel material around the pipe insertion portion can be fixed to the welded portion of the support plate by a third welding pin. The fire-resistant covering member for a pipe insertion portion according to claim 1 or 2.

5. The annular fire-resistant covering material can be fixed to the steel material on which the pipe insertion portion is formed by a second welding pin from the inside of the penetration portion of the annular fire-resistant covering material. The fire-resistant covering member for a pipe insertion portion according to claim 1 or 2.

6. a fire-resistant covering member that is inserted into a pipe insertion portion formed in a steel material and fixed to the steel material by a second welding pin, and a fire-resistant covering material that covers the steel material around the fire-resistant covering member, The fire-resistant covering member includes an annular fire-resistant covering material and a support plate formed in a substantially U-shape and having welded portions at both ends that cover part of the end faces of the annular fire-resistant covering material, The fire-resistant covering material covering the steel material around the fire-resistant covering member can be fixed to the welded portion by a third weld pin. A fire-resistant coated structure characterized by:

7. a step of fabricating a fire-resistant covering member by fixing a substantially U-shaped support plate extending from one end surface to the other end surface of the annular fire-resistant covering material to an inner surface of the annular fire-resistant covering material from an outer surface of the annular fire-resistant covering material with a first welding pin; and placing the fire-resistant covering member in a pipe insertion portion formed in a steel material, and electrically connecting the first welding pin, which fixes the annular fire-resistant covering member, to the steel material from the outer surface of the annular fire-resistant covering member. A fire-resistant coating method characterized by:

8. a step of covering the steel material around the pipe insertion portion with a fire-resistant covering material; and fixing the fire-resistant covering material covering the steel material around the piping insertion portion to the welded portion at the end of the support plate with a third weld pin. The fire-resistant coating method according to claim 7.

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