Radiation shielding door

Abstract

To provide a radiation shielding door which can reduce the number of steps of a welding work and the number of steps related to the welding work and can be easily carried into an existing facility by having a division structure.SOLUTION: A radiation shielding door 1 according to the embodiment has a radiation shielding function and has a door body 2 and a door frame. At least one of the door body 2 and the door frame is formed in such a manner that a plurality of members (a first block 21 having a recessed part 21a in a horizontal cross-sectional view and a second block 22 having a protruding part 22b engaged with the recessed part 21a in a horizontal cross-sectional view) are combined by engagement.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] This disclosure relates to a radiation shielding door having a radiation shielding function.

Background Art

[0002] Conventionally, a door structure having a radiation shielding function has been known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to the door structure described in Patent Document 1, since the configurations of the door body and the frame body are large-scale, the carrying-in work may become difficult when replacing the door structure in an existing facility. Further, when the door body and the frame body are configured to be divisible, welding or the like is required when combining the divided members, so there is a problem that the man-hours for configuring the door structure increase. Therefore, an object of the present disclosure is to solve the above-described problems.

Means for Solving the Problems

[0005] The radiation shielding door according to the first aspect of the present invention has a radiation shielding function and includes a door body and a door frame, and one or both of the door body and the door frame are configured by combining a plurality of members by engagement.

[0006] According to the radiation shielding door according to the first aspect, welding work and the man-hours related thereto can be reduced, and by adopting a divided structure, it becomes easy to carry it into an existing facility.

[0007] In addition, the radiation shielding door according to the second aspect is the radiation shielding door according to the first aspect, and the plurality of members are made of a material capable of shielding radiation.

[0008] According to the radiation shielding door according to the second aspect, one or both of the door body and the door frame can have a radiation shielding function.

[0009] In the radiation shielding door according to the second aspect, the material of the plurality of members can be iron, lead, tungsten, polyethylene, etc.

[0010] In addition, the radiation shielding door according to the third aspect is the radiation shielding door according to the second aspect, and the joints of the plurality of members in a combined state are formed in a bent shape in a cross-sectional view.

[0011] According to the radiation shielding door according to the third aspect, a radiation shielding function can be ensured.

[0012] In addition, the radiation shielding door according to the fourth aspect is the radiation shielding door according to the third aspect, and the plurality of members are a plurality of types of standardized blocks, including a first block with a recess formed in a cross-sectional view and a second block with a convex portion formed to fit into the recess in a cross-sectional view.

[0013] According to the radiation shielding door according to the fourth aspect, it becomes possible to easily combine one or both of the door body and the door frame by fitting the convex portion and the concave portion.

[0014] In addition, the radiation shielding door according to the fifth aspect is the radiation shielding door according to the third aspect, and the plurality of members are a plurality of types of standardized blocks, including a first labyrinth block presenting a first labyrinth shape in a cross-sectional view and a second labyrinth block presenting a second labyrinth shape engaging with the first labyrinth shape in a cross-sectional view.

[0015] According to the radiation shielding door according to the fifth aspect, by engaging the first labyrinth shape and the second labyrinth shape, it becomes possible to easily combine one or both of the door body and the door frame.

[0016] Further, the radiation shielding door according to the sixth aspect is the radiation shielding door according to the fifth aspect, wherein the first labyrinth block is engageable with other first labyrinth blocks, and the second labyrinth block is engageable with other second labyrinth blocks.

[0017] According to the radiation shielding door according to the sixth aspect, by engaging the first labyrinth blocks or the second labyrinth blocks with each other, it becomes possible to easily combine one or both of the door body and the door frame.

[0018] Further, the radiation shielding door according to the seventh aspect is the radiation shielding door according to the fifth aspect or the sixth aspect, and further includes a wedge member for maintaining the state in which the first labyrinth block or the second labyrinth block is engaged with other blocks.

[0019] According to the radiation shielding door according to the seventh aspect, it becomes possible to stably engage the first labyrinth block or the second labyrinth block with other blocks.

[0020] Note that the contents of the second to seventh aspects are not necessarily essential configurations in the radiation shielding door according to the present invention, and can be appropriately omitted / changed.

Advantages of the Invention

[0021] According to the radiation shielding door according to the present invention described above, welding work and the man-hours associated therewith can be reduced, and by adopting a split structure, it becomes easy to carry into existing facilities.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0023] [Radiation shielding door 1] Hereinafter, the radiation shielding door 1 according to the present invention will be described with reference to FIGS. 1 to 6. As shown in FIGS. 1 and 2, the radiation shielding door 1 is a large door structure that can open and close an opening in a concrete wall 10 in a building in a large-scale facility such as a nuclear power plant. In the present embodiment, the front side of the radiation shielding door 1 shown in FIG. 1 (the lower side in FIG. 2) will be described as the front of the radiation shielding door 1.

[0024] As shown in FIGS. 1 and 2, the radiation shielding door 1 according to the present embodiment includes a door body 2, a door frame, a first hinge 3, and a second hinge 4. A handle 2a is provided at the end of the door body 2 on the leading edge side.

[0025] The door body 2 and the door frame that support the door body 2, which constitute the radiation shielding door 1 according to this embodiment, are made of materials capable of shielding radiation (for example, iron, lead, tungsten, polyethylene, etc.). Thereby, the door body 2 and the door frame of the radiation shielding door 1 can have a radiation shielding function.

[0026] The first hinge 3 and the second hinge 4 support the door body 2 so as to be openable and closable by rotating the door body 2 with respect to the hinge support plate 11 in the door frame. Specifically, the first hinge 3 rotatably supports the lower part of the butt side of the door body 2, and the second hinge 4 rotatably supports the upper part of the butt side of the door body 2 with respect to the hinge support plate 11. That is, the radiation shielding door 1 is configured as a hinged door.

[0027] In the radiation shielding door 1 according to this embodiment, as shown in FIGS. 1 and 2, the door frame is composed of a hinge support plate 11 that supports the first hinge 3 and the second hinge 4, a vertical frame 12 configured as an assembly frame F, an upper frame 13, a lower frame 14, a first auxiliary frame 15, and a second auxiliary frame 16 combined.

[0028] As shown in FIGS. 3(a) and (b), the vertical frame 12 configured as the assembly frame F is composed of two types of standardized blocks combined by engagement. Specifically, the assembly frame F includes a first block 21 in which a recess 21a is formed in a horizontal cross-sectional view, and a second block 22 in which a main body portion 22a and a convex portion 22b that fits into the recess 21a in a horizontal cross-sectional view are formed.

[0029] As shown in FIGS. 3(a) and (b), in this embodiment, by fitting the convex portion 22b of the second block 22 and the recess 21a of the first block 21, it becomes possible to easily combine the assembly frame F. For this reason, in the radiation shielding door 1, the welding work for constructing the door frame and the man-hours involved can be reduced. Also, by making the door frame a split structure, it becomes easy to carry it into an existing facility.

[0030] As shown in Fig. 3(a), the convex portion 22b of the second block 22 is formed such that the width at the lower side is slightly narrower than that at the upper side. This makes it easier to insert the convex portion 22b into the concave portion 21a, enabling the engagement between the first block 21 and the second block 22 to be easily performed.

[0031] In the present embodiment, as shown in Fig. 3(b), the joint between the first block 21 and the second block 22 is formed in a shape that is bent in a cross-sectional view. Thereby, the radiation shielding function of the radiation shielding door 1 can be ensured.

[0032] As shown in Fig. 4(a), the assembly frame FA according to the second embodiment is configured by combining two types of standardized blocks by engagement. Specifically, the assembly frame FA includes a first block 21 in which a concave portion 21a is formed in a horizontal cross-sectional view, and a second block 22 in which a main body portion 22a and a convex portion 22c that fits into the concave portion 21a in a horizontal cross-sectional view are formed.

[0033] In the present embodiment, the convex portion 22c is formed in substantially the same shape as the concave portion 21a. When fitting the convex portion 22c into the concave portion 21a, the second block 22 is cooled to contract the convex portion 22c. In that state, the convex portion 22c is inserted into the concave portion 21a, and when it returns to normal temperature, the convex portion 22c expands, causing the convex portion 22c to fit into the concave portion 21a. Thus, also in the present embodiment, by fitting the convex portion 22c of the second block 22 and the concave portion 21a of the first block 21, the assembly frame FA can be easily combined.

[0034] As shown in Fig. 4(b), the assembly frame FB according to the third embodiment is configured by combining two types of standardized blocks by engagement. Specifically, the assembly frame FB includes a first block 21 in which a concave portion is formed in a horizontal cross-sectional view, and a second block 22 in which a main body portion 22a and a convex portion 22d that fits into the concave portion 21a in a horizontal cross-sectional view are formed.

[0035] In this embodiment, a soft portion 23 is provided around the convex portion 22d. In this embodiment, tungsten, which is a soft material, is adopted for the soft portion 23. In this embodiment, by providing the soft portion 23 around the convex portion 22d, it is possible to easily fit the convex portion 22d into the concave portion 21a. Thus, also in this embodiment, by fitting the convex portion 22d of the second block 22 and the concave portion 21a of the first block 21, it becomes possible to easily combine the assembly frame FB.

[0036] As shown in FIGS. 5(a) to (c), the assembly frame FC according to the fourth embodiment is configured by combining two types of standardized blocks by engagement. Specifically, the assembly frame FC includes a third block 24 in which a T-shaped concave portion 24a is formed, and a fourth block 25 in which a T-shaped convex portion 25a that fits into the T-shaped concave portion 24a is formed.

[0037] As shown in FIGS. 5(b) and (c), in this embodiment, with the T-shaped convex portion 25a of the fourth block 25 inserted into the T-shaped concave portion 24a of the third block 24, the T-shaped convex portion 25a can be engaged with the T-shaped concave portion 24a. Thus, by fitting the T-shaped convex portion 25a and the T-shaped concave portion 24a, it becomes possible to easily combine the assembly frame FC. For this reason, in the radiation shielding door, the welding work for constructing the door frame and the man-hours related thereto can be reduced. Also, by making the door frame into a divided structure, it becomes easy to carry it into an existing facility.

[0038] As shown in FIGS. 6(a), (b), and FIG. 7, the assembly frame FD according to the fifth embodiment is configured by combining two types of standardized blocks by engagement. Specifically, the assembly frame FD includes a first labyrinth block 31 having a first labyrinth shape in cross-sectional view, and a second labyrinth block 32 having a second labyrinth shape in cross-sectional view. In this specification, the "labyrinth shape" means a shape in which the outer peripheral surface bends inward and outward, so that concave and convex portions appear in the cross-sectional shape.

[0039] In this embodiment, as shown in FIGS. 6(b) and 7, the first labyrinth blocks 31 engage with each other. Also, as shown in FIGS. 6(b) and 7, the second labyrinth blocks 32 engage with each other.

[0040] Thus, in this embodiment, by engaging the first labyrinth blocks 31 or the second labyrinth blocks 32 with each other, it becomes possible to easily combine the assembly frames FD. For this reason, in the radiation shielding door, the welding work for forming the door frame and the man-hours related thereto can be reduced. Also, by making the door frame into a split structure, it becomes easy to carry it into an existing facility.

[0041] Further, in this embodiment, it further includes wedge members 33 for maintaining the state in which the first labyrinth blocks 31 and the second labyrinth blocks 32 are engaged with other first labyrinth blocks 31 or second labyrinth blocks 32. Specifically, as shown in FIG. 7, a plurality of wedge members 33, 33,... are inserted between the first labyrinth blocks 31 and between the second labyrinth blocks 32 from above and below. Thereby, it becomes possible to stably engage the first labyrinth blocks 31 and the second labyrinth blocks 32 with other blocks.

[0042] It is also possible to form an assembly frame by engaging the first labyrinth block 31 and the second labyrinth block 32 with each other. Also, even in this case, it is possible to adopt a configuration in which the engagement state between the first labyrinth block 31 and the second labyrinth block 32 is maintained by the wedge member 33.

[0043] As shown in FIGS. 8(a), (b) and FIGS. 9(a), (b), the assembly frame FE according to the sixth embodiment is configured by combining three types of standardized blocks by engagement. Specifically, the assembly frame FE includes a third labyrinth block 41 having a third labyrinth shape in cross-section, a fourth labyrinth block 42 having a fourth labyrinth shape in cross-section, and a fifth labyrinth block 43 having a fifth labyrinth shape in cross-section.

[0044] In this embodiment, as shown in FIGS. 8(a) and 8(b), the third labyrinth block 41 engages with another third labyrinth block 41, a fourth labyrinth block 42, or a fifth labyrinth block 43. Thus, in this embodiment, a plurality of third labyrinth blocks 41, 41,... are continuously engaged, and a fourth labyrinth block 42 or a fifth labyrinth block 43 is engaged with the third labyrinth block 41 at the end, whereby the assembly frame FE is configured.

[0045] Using the assembly frame FE configured as described above, a radiation shielding door (door body and door frame) is configured as shown in FIGS. 9(a) and 9(b). Thus, in this embodiment, by engaging a plurality of third labyrinth blocks 41, fourth labyrinth blocks 42, and fifth labyrinth blocks 43, it becomes possible to easily combine the assembly frame FE. For this reason, in the radiation shielding door, the welding work for configuring the door frame and the man-hours involved can be reduced. Further, by making the door frame into a split structure, it becomes easy to carry it into an existing facility.

[0046] Also, in this embodiment, it further includes a wedge member 44 for maintaining the state in which a plurality of third labyrinth blocks 41, fourth labyrinth blocks 42, and fifth labyrinth blocks 43 are engaged. Specifically, as shown in FIG. 8(b), a plurality of wedge members 44, 44,... are inserted into the gaps formed between the respective labyrinth blocks 41, 42, 43 from above and below. Thereby, it becomes possible to stably engage the respective labyrinth blocks 41, 42, 43.

[0047] As described above, in the radiation shielding door 1 according to this embodiment, the door frame is formed by combining and joining a plurality of members by engagement. Thus, by adopting a structure in which the door frame is divided, the carrying-in work can be performed with each member, so that it becomes possible to easily perform the carrying-in work of the door frame into an existing facility.

[0048] In addition, since a plurality of members are engaged to form the frame, there is no need to perform welding or the like between the members, and no joining members such as bolts and nuts are required. Therefore, the man-hours required for installing the radiation shielding door 1 can be suppressed. In addition, since the assembly work can be simplified, it becomes possible to perform the work even when there is no skilled worker.

[0049] In addition, compared with the configuration in which the door frame is integrally formed, the convenience of carrying in during transportation or the like is improved, so the man-hours at the time of installation can be reduced and cost reduction can be achieved. Also, even when there are restrictions on carrying in due to limitations such as floor load-bearing capacity and passage width, it becomes possible to carry in and construct by dividing the door frame. In addition, the area where construction (carrying in) into an existing building is possible can be expanded.

[0050] In addition, the structure in which the door frame is divided can reduce the weight compared with the integrally formed door frame, so the safety during the carrying-in work inside the existing building can be improved. Also, since each member can be lifted not only by a large crane, cost reduction at the time of installation can be achieved. In addition, since the rotation range of the crane expands, the workability is improved. Also, since the handling at the time of installation becomes simple, the quality of the radiation shielding door 1 can be improved. In addition, by configuring the door frame with a plurality of types of standardized blocks, it becomes possible to design each part, so it becomes possible to suppress the cost by simplifying the work.

[0051] [Modification Example] The above-described embodiment can be appropriately modified as shown in the following modification examples. Note that each modification example may be applied in combination with other modification examples as long as there is no contradiction.

[0052] In the radiation shielding door according to the present invention, a plurality of members are combined by engagement to form the door frame, but it is also possible to combine a plurality of members by engagement to form the door body. Also, for both the door frame and the door body, it is possible to combine a plurality of members by engagement to form them. At this time, it is also possible to combine three or more types of members by engagement to form the door frame or the door body.

[0053] Also, it is possible to configure the radiation shielding door as a sliding door instead of a hinged door. Even when the radiation shielding door is configured as a hinged door, the number and arrangement positions of the hinges are not limited to those of the present embodiment, and it is also possible to adopt a configuration in which three or more hinges are provided.

Explanation of Signs

[0054] 1 Radiation shielding door 2 Door body 2a Handle 3 First hinge 4 Second hinge 10 Wall body 11 Hinge support plate 12 Vertical frame (door frame) 13 Upper frame (door frame) 14 Lower frame (door frame) 15 First auxiliary frame 16 Second auxiliary frame 21 First block 21a Recess 22 Second block 22a Main body 22b Protrusion 22c Protrusion (second embodiment) 22d Protrusion (third embodiment) 23 Soft part 24 Third block 24a T-shaped recess 25 Fourth block 25a T-shaped protrusion 31 First labyrinth block 32 Second labyrinth block 33 Wedge member 41 Third labyrinth block 42 Fourth labyrinth block 43 Fifth labyrinth block 44 Wedge member F Assembly frame (first embodiment) FA Assembly frame (second embodiment) FB Assembly frame (third embodiment) FC Assembly frame (fourth embodiment) FD Assembly frame (fifth embodiment) FE Assembly frame (sixth embodiment)

Claims

1. A radiation shielding door having a radiation shielding function, comprising a door body and a door frame, wherein one or both of the door body and the door frame are constituted by a combination of a plurality of members engaged with each other. The radiation shielding door.

2. The plurality of members are made of a material capable of shielding radiation. The radiation shielding door according to Claim 1.

3. The joints of the plurality of members in a combined state with each other are formed in a bent shape in a cross-sectional view. The radiation shielding door according to Claim 2.

4. The plurality of members are a plurality of types of standardized blocks, including a first block having a recess formed in a cross-sectional view and a second block having a protrusion formed to fit into the recess in a cross-sectional view. The radiation shielding door according to Claim 3.

5. The plurality of members are a plurality of types of standardized blocks, including a first labyrinth block having a first labyrinth shape in a cross-sectional view and a second labyrinth block having a second labyrinth shape engaging with the first labyrinth shape in a cross-sectional view. The radiation shielding door according to Claim 3.

6. The first labyrinth block is engageable with another first labyrinth block, and the second labyrinth block is engageable with another second labyrinth block. The radiation shielding door according to Claim 5.

7. The radiation shielding door according to Claim 5 or Claim 6, further comprising a wedge member for maintaining the state in which the first labyrinth block or the second labyrinth block is engaged with another block.

Images