JP2017180022A - Support mechanism for protection net and plant facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more stably maintain fixation state between a supporting member supporting a protection net and a frame so as to stably support the protection net around a protection object.SOLUTION: A support mechanism 30 for protection net arranged along a frame 12 established around a protection object is fixed onto the frame 12, and comprises a plurality of supporting members 40 onto which a wire rope attached to the protection net is wound to support the protection net, and a reinforcing member 50 which is fixed onto the frame 12 and the supporting member 40 at a protection object side rather than the protection net and reinforces the supporting member 40.SELECTED DRAWING: Figure 3

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 is a support mechanism for a protection net arranged along a frame installed around a protection object, and is fixed to the frame. A plurality of support members that support the protection net by wrapping a rope attached to the protection net, and are fixed to the frame body and the support member on the protection object side of the protection net, and the support member And a reinforcing member for reinforcing the structure.

  The support mechanism for a protection net according to the present invention includes a reinforcing member that is fixed to the frame body and the support member on the side of the protection object relative to the protection net and reinforces the support member. As a result, even if a relatively large force acting on the support member toward the object to be protected acts on the support member due to a collision of a flying object with the protection net, a part of the force can be received by the reinforcing member. It becomes possible to reduce the load concerning the fixing | fixed part of a member and a frame. 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.

  Further, the support member has a substrate portion fixed to the frame body, and a columnar portion that extends from the substrate portion and around which the rope is wound, is cantilevered by the frame body, and the reinforcing member is It is preferable to be fixed to the 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.

  Further, the base plate portion has a fixed end fixed to the frame body and a free end, and the reinforcing member is more free than a point of action of a force acting on the support member via the rope. It is preferable to arrange on the end side. Thereby, the load concerning the fixing part of the fixed end of a board | substrate part and a frame can be reduced more.

  Moreover, it is preferable that the said protection net | network is arrange | positioned at the upper surface side of the said protection target object. As described above, when the protective net is disposed on the upper surface side of the protection target object, the support member and the frame can be fixed after the support member is placed and fixed on the reinforcing member. Therefore, it becomes possible to improve the workability of the fixing work between the support member and the frame.

  The reinforcing member is preferably fastened to a plate member fixed to the frame. Thereby, if a plate member is previously fixed to a frame, a reinforcement member can be easily fixed to a frame.

  In order to solve the above-described problems and achieve the object, the plant equipment of the present invention is at least partially supported by a protection net support mechanism of the present invention, a protection net supported by the support mechanism, and the protection net. And an object to be covered.

  The protection net support mechanism and the plant equipment according to the present invention can maintain the fixed state of the support member supporting the protection net and the frame more stably, and can stably support the protection net around the object to be protected. There is an effect that can be done.

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 explanatory view showing a fixing portion between the reinforcing member and the H-shaped steel (frame body). FIG. 6 is a cross-sectional view showing a main part of a protective net support mechanism as a comparative example.

  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. When the protection target 11 is a small facility, the protection target 11 may be covered by a single protection net 20. 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 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 the protection nets 20 are arranged along the frame 12 in a grid pattern. 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 arranged only on the upper surface side or only on the side surface side of the protection object 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 the side view, the description of the frame 12 is omitted. 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 a reinforcing member 50 (see FIG. 3) that is fixed to the frame body 12 and the support member 40 on the side of the protection object 11 with respect to the protection net 20 and reinforces 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-shaped substrate portion 41 fixed to the frame body 12, 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, and a substrate portion of the columnar portion 42. 41, and a holding plate 43 having a diameter larger than that of the columnar portion 42 fixed to the end portion on the opposite side to 41. In the plan view of FIG. 2, the description of the holding plate portion 43 is omitted. 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 of portions 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 description of the protection net 20 and the wire rope 21 is omitted, and the description of the protection net 20 is omitted in FIG.

  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 connected via a connecting portion 122. The 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 41 b of the substrate portion 41, and when the fixed end 41 a of the substrate portion 41 is fixed to the H-shaped steel 121, the protection object 11 of the H-shaped steel 121. 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 FIGS. 3 and 4, the reinforcing member 50 extends between the H-shaped steels 121 to which the support members 40 are fixed, and on the protection object 11 side (lower side in FIG. 4) of each support member 40. Be placed. In this embodiment, the reinforcing member 50 is an H-shaped steel having a pair of flanges 50a and a web 50b extending between the pair of flanges 50a. For the reinforcing member 50, an H-shaped steel smaller than the H-shaped steel 121 used for the frame body 12 is used. The reinforcing member 50 is not limited to the H-shaped steel, and may be a T-shaped steel material, a plate-shaped steel material, or the like.

  FIG. 5 is an enlarged explanatory view showing a fixing portion between the reinforcing member 50 and the H-shaped steel 121 (frame body 12). As shown in the figure, a plate member 60 to which the web 50b of the reinforcing member 50 can be attached is fixed to the web 121b of the H-shaped steel 121 in advance by welding. The reinforcing member 50 is fixed to the frame body 12 by fastening the web 50b at both ends to the plate member 60 by a plurality of bolts 61 and two nuts 62 (in this embodiment). Thus, if the plate member 60 is provided in advance in the H-shaped steel 121, that is, the frame body 12, the reinforcing member 50 can be easily fixed to the frame body 12.

  In the reinforcing member 50, the flange 50 a on the side opposite to the protection object 11, that is, the upper flange 50 a in FIG. 4 is fixed to the substrate portion 41 of the support member 40 by welding. As shown in FIGS. 3 and 4, the reinforcing member 50 is disposed closer to the free end 41 b than the axial center 42 a of the columnar portion 42 of the support member 40. Here, the point of action X of the force acting on the support member 40 from the protective net 20 via the wire rope 21 (see the solid line arrow in FIG. 4) is the relationship between the wire rope 21 and the support member 40, as shown in FIG. It becomes a contact part. That is, the reinforcing member 50 is disposed on the free end 41 b side of the board portion 41 with respect to the point X of the force acting on the support member 40 from the protective net 20 via the wire rope 21.

  Thus, by fixing the reinforcing member 50 fixed to the frame body 12 to the substrate portion 41 of the support member 40, for example, a flying object such as a steel frame collides with one protective net 20 due to a tornado. 4, even if a relatively large force acting on the support member 40 toward the protection target 11 acts on the support member 40, a part of the force can be received by the reinforcing member 50. At this time, the reinforcing member 50 is disposed on the free end 41b side of the board portion 41 from the point X of the force acting on the support member 40 from the protective net 20 via the wire rope 21, so that the board portion is caused by the force. It is possible to prevent the portion of 41 on the free end 41b side from moving downward in the figure. As a result, the load applied to the fixed portion between the fixed end 41a of the substrate portion 41 and the fixed plate 121c of the H-shaped steel 121 can be further 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.

  Further, when the support member 40 is cantilevered by the frame body 12 (H-shaped steel 121) as in this embodiment, when the flying object collides with the protective net 20, the support member 40 and the frame body 12 are used. The supporting member 40 cantilevered by the frame body 12 by receiving a part of the force acting on the supporting member 40 by the reinforcing 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, in the support mechanism 30 that supports the protection net 20 disposed on the upper surface side of the protection object 11, the reinforcing member 50 is disposed on the lower side in the vertical direction of the support member 40. Accordingly, when the support member 40 is fixed to the frame body 12 (H-shaped steel 121), the support member 40 is once placed on the flange 50a of the reinforcement member 50, and the reinforcement member 50 and the substrate portion 41 are welded. Then, the work of fixing the substrate part 41 and the H-shaped steel 121 by welding can be performed. As a result, the workability of the fixing work between the support member 40 and the frame body 12 is improved, such as facilitating the welding work between the substrate portion 41 and the H-shaped steel 121, improving the welding quality, and improving the safety in the high place work. It becomes possible.

  Furthermore, in the support mechanism 30 that supports the protection net 20 disposed on the upper surface side of the protection object 11, the support member 30 is disposed closer to the free end 41 b than the axial center 42 a of the columnar portion 42 of the support member 40. The columnar portion 42 having a relatively large weight in 40 can be supported by the reinforcing member 50. As a result, it is possible to further reduce the load applied to the fixing portion between the fixing end 41a of the substrate portion 41 and the fixing plate 121c of the H-shaped steel 121, and to maintain the fixing state of the support member 40 and the frame body 12 more stably. It becomes possible.

  In addition, by fixing the reinforcing member 50 to the support member 40, it is possible to suppress the support member 40 from being deformed by welding distortion when the support member 40 and the H-shaped steel 121 are welded. FIG. 6 is a cross-sectional view of a main part showing a support mechanism 30B of the protective net 20 as a comparative example. As illustrated, the support mechanism 30 </ b> B is obtained by omitting the reinforcing member 50 from the support mechanism 30. Thus, when the reinforcing member 50 is not fixed to the substrate portion 41 of the support member 40, when the substrate portion 41 is welded to the fixing plate 121c of the H-shaped steel 121, the substrate portion 41 is deformed due to the occurrence of welding distortion. There is a risk that. On the other hand, in the support mechanism 30 of the protection net 20 according to the present embodiment, the reinforcing member 50 can be fixed to the substrate portion 41 before the substrate portion 41 of the support member 40 is fixed to the H-shaped steel 121 by welding. Thereby, when the board | substrate part 41 and the H-shaped steel 121 are welded, it becomes possible to prevent the board | substrate part 41 from deform | transforming by welding distortion. As a result, the protection net 20 can be more stably supported by the support member 40.

  As described above, the support mechanism 30 of the protection net 20 included in the plant facility 10 according to the embodiment is fixed to the frame body 12 and the support member 40 on the side of the protection object 11 with respect to the protection net 20, and the support member 40 is A reinforcing member 50 for reinforcement is provided. Thereby, even if a relatively large force is applied to the support member 40 toward the protection object 11 due to the collision of the flying object with the protection net 20, a part of the force can be received by the reinforcing member 50. Therefore, it is possible to reduce the load applied to the fixing portion between the support member 40 and the frame body 12. 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 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, and the reinforcing member 50 is fixed to the substrate portion 41. The 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 substrate portion 41 has a fixed end 41 a fixed to the frame body 12 and a free end 41 b, and the reinforcing member 50 is applied from an action point X of a force acting on the support member 40 via the wire rope 21. Is also arranged on the free end 41b side. Thereby, the load concerning the fixing part of the fixed end 41a of the board | substrate part 41 and the frame 12 can be reduced more. Note that the reinforcing member 50 may be disposed closer to the fixed end 41 a of the substrate portion 41 than the point of action of the force acting on the support member 40 from the protective net 20 via the wire rope 21.

  Further, the protection net 20 is arranged on the upper surface side of the protection object 11. As described above, when the protection net 20 is arranged on the upper surface side of the protection object 11, the support member 40 is placed on the reinforcing member 50 and fixed, and then the support member 40 and the frame 12 are fixed. Since the work can be performed, the workability of the fixing work between the support member 40 and the frame body 12 can be improved.

  The reinforcing member 50 is fastened to the plate member 60 fixed to the frame body 12. Thereby, if the plate member 60 is fixed to the frame body 12 in advance, the reinforcing member 50 can be easily fixed to the frame body 12. In the present embodiment, one plate member 60 provided in advance on the H-shaped steel 121 and the web 50b of the reinforcing member 50 are fastened by the bolt 61 and the nut 62, but the reinforcing member 50 and the H-shaped steel 121 are used. The connection structure is not limited to this. For example, the reinforcing member 50 may be directly fixed to the H-shaped steel 121 by a method such as extending the web 50 b of the reinforcing member 50 and welding it to the H-shaped steel 121.

DESCRIPTION OF SYMBOLS 10 Plant equipment 11 Protection object 12 Frame 121 H-shaped steel 121a, 50a Flange 121b, 50b Web 121c Fixing plate 13 Turn buckle 20 Protective net 20a Notch 21 Wire rope 30 Support mechanism 40 Support member 41 Substrate part 41a Fixed end 41b Free End 42 Columnar part 42a Axis center 44 Separator 50 Reinforcing member

Claims (6)

A protection net support mechanism arranged along a frame body installed around a protection 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;
A reinforcement member that is fixed to the frame body and the support member on the side of the protection object relative to the protection net, and reinforces the support member;
A support mechanism for a protective net, comprising: The support member includes a substrate portion fixed to the frame body, and a columnar portion around which the rope is wound while extending from the substrate portion,
The protection net supporting mechanism according to claim 1, wherein the reinforcing member is fixed to the substrate portion. The substrate portion has a fixed end fixed to the frame body and a free end,
3. The support mechanism for a protective net according to claim 2, wherein the reinforcing member is disposed on the free end side with respect to an action point of a force acting on the support member via the rope.   The said protection net | network is arrange | positioned at the upper surface side of the said protection target object, The support mechanism of the protection net | network as described in any one of Claim 1 to 3 characterized by the above-mentioned.   5. The protective net support mechanism according to claim 1, wherein the reinforcing member is fastened to a plate member fixed to the frame. 6.   A protection net support mechanism according to any one of claims 1 to 5, a protection net supported by the support mechanism, and a protection object that is at least partially covered by the protection net. Characteristic plant equipment.

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