JP6623107B2 - Protective net support mechanism and plant equipment - Google Patents

Description

  The present invention relates to a protective net support mechanism and plant equipment.

  2. Description of the Related Art Conventionally, a technique for supporting a protective net that covers a protection target by a frame body that is installed around the protection target is known. For example, in Patent Document 1, a linear member (rope) attached to a peripheral portion of a film-like member (protective net) is attached to a plurality of support portions provided on a frame body installed around a protection target. A support structure is disclosed in which the membrane member is supported by a frame through a plurality of support portions by being attached.

Japanese Patent Laying-Open No. 2015-163761

  However, depending on the method of fixing multiple support parts to the frame, when a relatively large force acts on the support part due to the impact of a flying object on the protective net, the fixed state of the support part and the frame can be stabilized. It may not be possible to maintain the protective net, and the protective net may not be supported stably.

  The present invention has been made in view of the above, and more stably maintains the fixed state of the support member and the frame body that support the protective net, and stably supports the protective net around the object to be protected. With the goal.

  In order to solve the above-described problems and achieve the object, the present invention provides a support mechanism for a protection net, a plurality of which are arranged side by side along a frame body installed around a protection object. A plurality of support members fixed to the body and wrapped around a rope attached to the protection net to support the protection net, and the frame are separate members, and the same protection among the plurality of support members And a connecting member that connects at least one of the members that support the nets and the members that support the different protective nets.

  The protection net support mechanism of the present invention is a separate member from the frame, and among the plurality of support members, at least one supporting the same protection net and at least one supporting the different protection nets. Since the connecting member for connecting any one of them is provided, a part of the force acting on the support member when the flying object collides with the protective net can be shared by the one connected by the connecting member. As a result, even if a flying object collides with the protective net, it is possible to reduce the force acting on the support member that supports the protective net. Therefore, according to the protection net support mechanism of the present invention, it is possible to more stably maintain the fixed state between the support member supporting the protection net and the frame, and to stably support the protection net around the object to be protected. It becomes possible.

  Moreover, it is preferable that the said connection member connects what is arrange | positioned adjacently while supporting the said different protection net | network among these support members. Thus, a part of the force acting on the support member when the flying object collides can be shared and supported by the supporting member that supports the protection net different from the protection net on which the flying object collides. Therefore, it is possible to more stably maintain the fixed state between the support member that supports the protection net and the frame, and to support the protection net more stably around the object to be protected.

  Moreover, it is preferable that the said supporting member has a board | substrate part fixed to the said frame, and a columnar part around which the said rope is wound while extending from the said board | substrate part. As described above, even when the support member is fixed to the frame body at the substrate portion, according to the protection net support mechanism of the present invention, the fixed state between the support member supporting the protection net and the frame body is more stable. It is possible to maintain and stably support the protective net around the object to be protected.

  Moreover, it is preferable that the said connection member is attached to the attachment surface on the opposite side to the said board | substrate part of the said columnar part. Thereby, it can suppress by a connection member that the rope wound around a columnar part will remove | deviate from the said columnar part.

  In order to solve the above-described problems and achieve the object, the plant equipment of the present invention is supported by the protective net support mechanism of the present invention and the support mechanism, and a plurality of them are arranged along the frame. It is provided with the arranged protection net | network and the protection target object partially covered by the said protection net | network.

  The protection net supporting mechanism and the plant equipment according to the present invention can maintain the fixing of the supporting member supporting the protective net and the frame better, and can stably support the protective net around the object to be protected. There is an effect.

Drawing 1 is a schematic diagram showing the important section of the plant equipment concerning an embodiment. FIG. 2 is a schematic diagram illustrating a protection net support mechanism according to the embodiment. FIG. 3 is an explanatory view showing the periphery of the fixing portion between the support member and the frame. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is an enlarged view showing the connecting member. FIG. 6 is a cross-sectional view taken along line BB in FIG. FIG. 7 is a cross-sectional view of a main part showing a support mechanism for a protective net according to a modification. FIG. 8 is a schematic diagram illustrating a main part of plant equipment provided with a support mechanism for a protective net according to a modification. FIG. 9 is a schematic view showing a support mechanism for a protective net according to a modification.

  DESCRIPTION OF EMBODIMENTS Embodiments of a protective net support mechanism and plant equipment according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.

  Drawing 1 is a schematic diagram showing the important section of plant equipment 10 concerning an embodiment. The plant facility 10 is a facility such as a nuclear power plant or a reprocessing plant, for example, and as shown in FIG. 1, a protection object 11, a frame 12 surrounding the protection object 11, and a protection object 11. And a plurality of protective nets 20 to which the wire ropes 21 are attached and a support mechanism 30 that supports the protective nets 20.

  The protection object 11 is equipment such as a pump, for example, and is disposed outside the building. The frame 12 is formed by assembling a plurality of steel frames such as H-shaped steel, I-shaped steel, angle steel, and channel steel around the protection target 11. The frame 12 has an opening formed between a plurality of steel frames.

  The protective net 20 is a wire net made of a metal material such as stainless steel or iron. The protective net 20 may be a fiber network such as synthetic resin fiber or natural fiber. A plurality of protection nets 20 are arranged in a grid pattern along the frame body 12, and close the openings formed between the plurality of steel frames of the frame body 12. In the present embodiment, the plurality of protection nets 20 are stretched around the upper surface side and the side surface side of the protection object 11, and protect the protection object 11 from flying objects such as steel frames flying due to a tornado, for example. . The plurality of protection nets 20 may be disposed only on the upper surface side or only on the side surface side of the protection target 11. Each protective net 20 is formed in a rectangular shape, and a rectangular notch 20a (see FIG. 2) is formed at the corners of the four corners. Moreover, the protection net | network 20 may be formed in square shape, and a square-shaped notch may be formed in the corner | angular part of four corners. The notch 20a may be formed in an arc shape.

  The wire rope 21 is made of, for example, a hard steel wire, a stainless steel wire, a piano wire, or the like, and is sewn to the peripheral portion of the protective net 20. One wire rope 21 is attached to each of the protective nets 20, and both ends are connected to the turnbuckle 13 (see FIG. 2). A plurality of wire ropes 21 may be attached to each of the protective nets 20.

  FIG. 2 is a schematic diagram illustrating the support mechanism 30 of the protection net 20 according to the embodiment. The left figure in the figure is a plan view, and the right figure in the figure is a side view. In addition, description of the frame 12 is abbreviate | omitted in the side view. The support mechanism 30 is fixed to the frame body 12 and a plurality of (four in this embodiment) support members that support the protection net 20 by winding wire ropes 21 attached to each of the protection nets 20. 40 and the frame 12 are formed as separate members, and a connecting member 50 (see FIG. 1) that supports different protective nets 20 and connects adjacent ones of the plurality of supporting members 40. Is provided. In FIG. 2, the connection member 50 is not shown to show the support member 40.

  Each support member 40 is disposed inside a notch 20 a formed at the four corners of the protective net 20. The support member 40 includes a plate-like substrate portion 41 fixed to the frame body 12 and a hollow cylindrical columnar portion 42 that extends from the substrate portion 41 and has the wire rope 21 wound around the outer peripheral surface thereof. The substrate portion 41 of the support member 40 may have a rectangular cross section, a polygonal cross section, or a circular cross section. Further, the columnar portion 42 may have a prismatic shape.

  In the present embodiment, four protection nets 20 are stacked and arranged along the axial direction of the columnar portion 42 of the support member 40, and the wire ropes 21 attached to each protection net 20 are attached to each support member 40. It is wound around the outer peripheral surface of the columnar section 42. Note that the number of the protective nets 20 stacked is not limited to four, and may be at least one. Here, the columnar portion 42 of the support member 40 includes a plurality of separators 44 that are formed at intervals along the axial direction of the columnar portion 42 and project from the outer peripheral surface. Each separator 44 is formed in a plate shape. Each separator 44 divides the outer peripheral surface of the columnar portion 42 into five ranges in the axial direction. The plurality of wire ropes 21 are individually wound around each range of the outer peripheral surface of the columnar portion 42 divided into a plurality in the axial direction by a plurality of separators 44 for each of the plurality of protection nets 20. Thereby, it is possible to prevent the wire ropes 21 from interfering with each other between the plurality of protection nets 20, and to apply appropriate tension to the wire ropes 21 and thus the protection nets 20. The separator 44 may be omitted.

  Next, a fixing structure between the support member 40 and the frame body 12 will be described. FIG. 3 is an explanatory view showing the periphery of the fixing portion between the support member 40 and the frame body 12, and FIG. 4 is a cross-sectional view taken along the line AA in FIG. In FIG. 3, the connection member 50 is not shown in order to show a fixing structure between the support member 40 and the frame body 12. Moreover, in FIG. 4, description of the wire rope 21 is abbreviate | omitted.

  As illustrated, a plurality of H-shaped steels 121 having a pair of flanges 121a and a web 121b extending vertically between the pair of flanges 121a are used for the frame 12 to which the support member 40 is fixed. Each H-shaped steel 121 is formed with a plate-like fixing plate 121c extending vertically between the pair of flanges 121a on the side of the web 121b.

  As shown in FIGS. 3 and 4, the base plate portion 41 of the support member 40 has two fixed ends 41 a that are fixed to the fixed plate 121 c of the H-shaped steel 121 by welding, and a free end 41 b. In FIG. 3, the fixed end 41 a of the substrate portion 41 is shown by a solid line for the sake of simplicity. The support member 40 is cantilevered by the H-shaped steel 121, that is, the frame body 12 by fixing the substrate portion 41 to the fixed plate 121 c of the H-shaped steel 121 at the two fixed ends 41 a. The columnar portion 42 of the support member 40 is formed in the vicinity of the free end 41b of the substrate portion 41. When the fixed end 41a of the substrate portion 41 is fixed to the H-shaped steel 121c, the protection object 11 of the H-shaped steel 121 is obtained. Extends to the outside of the flange 121a located on the opposite side (upper side in FIG. 4).

  In the present embodiment, as shown in FIG. 4, the fixed portion between the fixed end 41 a of the substrate portion 41 and the fixed plate 121 c of the H-shaped steel 121 is opposite to the protection object 11 of the H-shaped steel 121, that is, the upper side in FIG. 4. In the vicinity of the flange 121a located in Thereby, even if a flying object collides with the protection net 20 and the protection net 20 is bent toward the protection object 11 side, that is, the lower side in FIG. 4, the flying object is protected via the protection net 20. 11 can be prevented from colliding. Note that the fixed portion between the fixed end 41a of the substrate portion 41 and the fixed plate 121c of the H-shaped steel 121 may be in the vicinity of the flange 121a located on the H 11 steel 121 side of the protection object 11, that is, the lower side in FIG. Good. Moreover, the fixed end 41a of the board | substrate part 41 may be fixed to the web 121b of the H-shaped steel 121, and is fixed to the end surface on the opposite side (the upper side in FIG. 4) of the flange 121a of the H-shaped steel 121. May be. Further, the substrate portion 41 may be fastened to the H-shaped steel 121 using a plurality of bolts and nuts.

  As shown in FIG. 1, the connecting member 50 includes two support members 40 arranged in the left-right direction in FIG. 1 among the support members 40 that support the protective nets 20 arranged side by side along the frame 12. Are connected. The connecting member 50 may connect two supporting members 40 arranged in the vertical direction in FIG. FIG. 5 is an enlarged view showing the connecting member 50. As shown in the drawing, the connecting member 50 is a plate-like member having both sides formed in an arc shape. As shown in FIG. 4, the connecting member 50 straddles the H-shaped steel 121 to which the two supporting members 40 arranged adjacent to each other are fixed, and the substrate portion 41 of the columnar portion 42 of the two supporting members 40. It is attached to the attachment surface 42a on the opposite side. Thus, the connection member 50 can be made into a simple structure by connecting the support members 40 arranged adjacent to each other.

  Next, a structure for attaching the connecting member 50 to the support member 40 will be described. FIG. 6 is a cross-sectional view taken along line BB in FIG. As shown in the drawing, the columnar portion 42 of the support member 40 extends from the hollow cylindrical portion 421 around which each wire rope 21 is wound, and the end portion of the cylindrical portion 421 opposite to the substrate portion 41, and And an annular portion 422 formed with a mounting surface 42a. An opening 422 a that communicates with the inside of the cylindrical portion 421 is formed in the annular portion 422. The annular portion 422 is formed along the periphery of the opening 422a and has eight fastening holes 422b into which the bolts 61 can be inserted.

  As shown in FIGS. 5 and 6, the connecting member 50 has an opening 50 a that communicates with the opening 422 a formed in the annular portion 422 of the columnar portion 42 when attached to the support member 40. The connecting member 50 is formed along the periphery of the opening 50 a and has eight fastening holes 50 b into which the bolts 61 can be inserted. As shown in FIGS. 5 and 6, the support member 40 and the connecting member 50 are connected to each other through the fastening holes 422 b formed in the annular portion 422 of the columnar part 42 and the fastening holes 50 b formed in the connecting member 50. The eight bolts 61 and the nuts 62 are connected to each other by fastening them. At this time, since the bolt 61 can be inserted into the cylindrical portion 421 of the columnar portion 42 through the opening 50a of the connecting member 50 and the opening 422a of the annular portion 422, the bolt 61 can be easily connected to the fastening hole 422b and the fastening portion. It can be inserted into the hole 50b. The number of bolts 61 and nuts 62 is not limited to eight, and may be any number that can firmly connect the connecting member 50 and the support member 40. Moreover, the connection member 50 and the support member 40 may be connected by welding.

  As described above, the support mechanism 30 of the protection net 20 according to the present embodiment includes the connecting member 50 that supports the different protection nets 20 among the plurality of support members 40 and connects adjacently arranged members. Thereby, for example, when a flying object such as a steel frame collides with one protective net 20 due to a tornado, a part of the force acting on each support member 40 that supports the protective net 20 due to the collision of the flying object is reduced. The support member 40 that supports the protective net 20 different from the protective net 20 with which the flying object collides can be shared and handled. As a result, it is possible to reduce the force acting on the support member 40 that supports the protective net 20 on which the flying object collides. Therefore, according to the support mechanism 30 of the protection net 20 according to the embodiment, the fixing state of the support member 40 that supports the protection net 20 and the frame body 12 is maintained more stably, and the protection net 20 is attached to the protection object 11. It becomes possible to support stably around.

  When the support member 40 is cantilevered by the frame body 12 (H-shaped steel 121) as in this embodiment, the support member 40 and the frame body 12 are fixed when a flying object collides with the protective net 20. Although the load applied to the part tends to be relatively large, the support member 40 that is cantilevered by the frame body 12 by connecting the support members 40 that support the different protective nets 20 by the connection member 50 and the frame body 12. Can be stably maintained. As a result, the welding length required between the fixed end 41a of the substrate part 41 and the fixed plate 121c of the H-shaped steel 121 can be reduced. For this reason, the support member 40 can be reduced in size and weight, and as a result, the protection net 20 can be attached to a place having a narrow space or a weight limit.

  Further, as described above, the connecting member 50 is attached to the attachment surface 42 a located on the opposite side of the columnar part 42 from the substrate part 41. As a result, the connecting member 50 also functions as a restraining plate that prevents the wire ropes 21 wound around the columnar part 42 from being detached from the columnar part 42. As a result, the protection net 20 is wound by the strong wind and moved to the opposite side of the protection object 11, or is wound around the columnar portion 42 due to a splash caused by a flying object colliding with the protection net 20. It is possible to prevent the wire ropes 21 from being detached.

  As described above, the support mechanism 30 of the protection net 20 included in the plant facility 10 according to the embodiment is a separate member from the frame 12 and supports different protection nets 20 among the plurality of support members 40. In addition, a connecting member 50 is provided for connecting the members arranged adjacent to each other. Thereby, a part of the force acting on the support member 40 due to the collision of the flying object with the protective net 20 is shared by the support member 40 that supports the protective net 20 different from the protective net 20 with which the flying object collided. Can take charge. Therefore, according to the support mechanism 30 of the protection net 20 and the plant facility 10 according to the embodiment, the fixing state of the support member 40 that supports the protection net 20 and the frame body 12 is more stably maintained, and the protection net 20 is It becomes possible to stably support around the protection object 11.

  The support member 40 includes a substrate portion 41 fixed to the frame body 12 and a columnar portion 42 that extends from the substrate portion 41 and is wound with the wire rope 21. As described above, even when the support member 40 is fixed to the frame body 12 by the base plate portion 41, the support member 40 and the frame body that support the protection net 20 according to the support mechanism 30 of the protection net 20 according to the embodiment. 12 can be more stably maintained, and the protection net 20 can be stably supported around the protection target 11.

  Further, the connecting member 50 is attached to the attachment surface 42 a on the side opposite to the substrate part 41 of the columnar part 42. As a result, the connecting member 30 can prevent the wire rope 21 wound around the columnar part 42 from being detached from the columnar part 42. In addition, it is good also as what attaches the connection member 30 to the said holding | suppressing board part by providing the attaching surface 42a of the columnar part 42 with a larger diameter pressing board part than the said columnar part 42. FIG.

  The attachment structure of the connecting member 50 to the support member 40 is not limited to that shown in FIG. FIG. 7 is a cross-sectional view of the main part showing the support mechanism 30B of the protection net 20 according to the modification. The support mechanism 30B includes a support member 40B instead of the support member 40 of the support mechanism 30. As illustrated, the columnar portion 42 of the support member 40B has a cylindrical fitting portion 423 that protrudes from the annular portion 422 toward the opposite side of the substrate portion 41. The fitting portion 423 is formed so as to be fitted into the opening 50 a of the connecting member 50. Thereby, support member 40B and connecting member 50 can be connected more firmly. Note that the bolt 61 and the nut 62 may be omitted if the fitting portion 423 is formed to have a sufficient length to connect the support member 40B and the connecting member 50.

  Further, in this embodiment, while supporting the different protective nets 20 and connecting the two support members 40 arranged in the left-right direction in FIG. 1 by the connecting member 50, the connecting structure of the plurality of supporting members 40 is as follows. It is not limited to this. FIG. 8 is a schematic diagram illustrating a main part of a plant facility 10 </ b> C provided with a support mechanism 30 </ b> C for the protection net 20 according to the modification. As illustrated, the support mechanism 30 </ b> C includes a connection member 50 </ b> C instead of a part of the connection member 50 of the support mechanism 30.

  The connection member 50C is a rectangular plate that supports four different protection nets 20 among a plurality of support members 40 that support the protection nets 20 arranged in a grid shape, and connects all of the adjacent ones arranged adjacent to each other. Formed as a shaped member. Accordingly, when a flying object collides with one protective net 20, a part of the force acting on the support member 40 supporting the protective net 20 is different from the protective net 20 with which the flying object collides. The support member 40 that supports the protective net 20 can share and take charge. As a result, it is possible to further reduce the force acting on the support member 40 that supports the protective net 20 on which the flying object collides. Therefore, the fixing state of the support member 40 that supports the protection net 20 and the frame body 12 can be maintained more stably, and the protection net 20 can be supported more stably around the protection object 11.

  Further, instead of the support members 40 that support the different protection nets 20, the support members 40 that support the same protection net 20 may be connected. FIG. 9 is a schematic view showing a support mechanism 30D of the protection net 20 according to the modification. The support mechanism 30D includes a connection member 50D instead of the connection member 50 of the support mechanism 30. As shown in the figure, the connecting member 50D connects two of the support members 40 that support the same protective net 20 that face each other on the short side of the protective net 20.

  Thus, even when the support members 40 that support the same protection net 20 are connected to each other, the force acting on the support member 40 when the flying object collides with the protection net 20 is connected by the connection member 50D. You can share it with things. In particular, when a flying object collides with the corner of the protective net 20, the force acting on the support member 40 located near the corner can be reduced. Accordingly, it is possible to more stably maintain the fixed state between the support member 40 that supports the protection net 20 and the frame body 12 and to stably support the protection net 20 around the protection target 11. The connecting member 50D preferably has higher rigidity than the connecting member 50.

  Further, the connecting member 50 </ b> D shown in FIG. 9 may connect all the supporting members 40 that support the same protective net 20. Furthermore, in addition to connecting the support members 40 that support the same protection net 20, the connection member 50 </ b> D may support different protection nets 20 and connect adjacent support members 40. That is, the connecting member 50 </ b> D may connect all the supporting members 40 that support the protective net 20 arranged along the frame 12.

DESCRIPTION OF SYMBOLS 10,10C Plant equipment 11 Protection target object 12 Frame body 121 H type steel 121a Flange 121b Web 121c Fixing plate 13 Turnbuckle 20 Protective net 20a Notch 21 Wire rope 30, 30B, 30C, 30D Support mechanism 40, 40B Support member 41 Substrate Portion 41a fixed end 41b free end 42 columnar portion 42a mounting surface 421 cylindrical portion 422 annular portion 422a opening 422b, 50b fastening hole 423 fitting portion 44 separator 50, 50C, 50D connecting member 50a opening 61 bolt 62 nut

Claims (5)

A protective net support mechanism in which a plurality is arranged along a frame installed around a protective object,
A plurality of support members fixed to the frame body and wrapped around a rope attached to the protection net to support the protection net;
The frame is a separate member, and among the plurality of support members, a member that supports the same protection net, and a connection member that connects at least one of the different support nets,
A support mechanism for a protective net, comprising:   The said connection member supports the said protection net | network different among these support members, and connects what is arrange | positioned adjacently, The support mechanism of the protection net | network of Claim 1 characterized by the above-mentioned.   3. The support mechanism for a protective net according to claim 1, wherein the support member has a base plate portion fixed to the frame body, and a columnar portion that extends from the base plate portion and around which the rope is wound. .   4. The protective net support mechanism according to claim 3, wherein the connecting member is attached to an attachment surface of the columnar portion opposite to the substrate portion.   A protection net support mechanism according to any one of claims 1 to 4, a plurality of protection nets supported by the support mechanism and arranged side by side along the frame, and the protection net A plant facility comprising: a protected object partially covered.

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