JP2015034024A - Curing method of container with flange and lid member for curing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent foreign objects from being mixed into a container with a flange and preferably inhibit dew condensation water from accumulating on a flange surface.SOLUTION: In a curing method of a container with a flange, a flange part 22 is formed at an opening edge part and a lid member 1 is formed by a sheet having air permeability and flame resistance so that the lid member 1 has an outer diameter equal to an inner diameter of an opening part 21 of a cup shaped container in which a liquid W is stored. The lid member 1 is arranged so that the opening part 21 is covered by the lid member 1 when viewed from an axial direction of the container.

Description

  The present invention relates to a method for curing a flanged container and a lid member for curing.

Conventionally, what was disclosed by patent document 1 as a technique of sealing a container with a flange is known.
The technique of Patent Document 1 is such that a notch for inserting a part of the flange portion is formed at a specific position of one sheet, and the container with the flange can be easily sealed, and there is an improperness such as contamination of foreign matter. It can prevent the act.

JP2012-140142A

In general, as a curing sheet used for curing at a construction site or the like, a sheet having water resistance in addition to the original function of preventing foreign matter from being mixed is known.
By the way, when a general curing sheet is used in a flanged container in which a liquid such as water is stored in a container, such as a reactor pressure container installed in a nuclear power generation facility, the inner surface of the curing sheet Condensed water was generated on the surface, and the condensed water could stay on the flange surface through the curing sheet. If the condensed water stays on the flange surface in this way, there is a risk of causing rusting.

  Accordingly, the present invention provides a curing method for a flanged container and a lid member for curing that can prevent foreign matter from entering the flanged container and can suitably avoid the accumulation of condensed water on the flange surface. There is.

  The method for curing a flanged container according to the present invention is air permeable and difficult to have an outer diameter that is the same as the inner diameter of the opening of the bottomed cylindrical container in which the flange is formed at the opening edge and the liquid is stored inside. A lid member is formed of a flammable sheet, and the lid member is disposed so that the opening is covered with the lid member when viewed from the axial direction of the container.

  Further, the lid member for curing according to the present invention is arranged at the opening of a bottomed cylindrical container in which a flange is formed at the opening edge and the liquid is stored inside, and has the same outer diameter as the inner diameter of the opening. It is characterized by being formed of a breathable and flame retardant sheet.

  ADVANTAGE OF THE INVENTION According to this invention, while preventing the foreign material mixing in the container with a flange, and avoiding that dew condensation water accumulates on a flange surface, the curing method of the container with a flange and the cover member for curing are obtained. It is done.

It is a schematic cross section which shows the state which covered the opening part of the container with a flange with the cover member for curing which concerns on 1st Embodiment of this invention. It is a schematic cross section which shows the positional relationship between the opening part in the flange vicinity and the outer peripheral part of a cover member in 1st Embodiment. It is a schematic plan view which shows the state which covered the opening part of the container with a flange with the cover member of 1st Embodiment. It is a top view which shows the cover member of 1st Embodiment. It is a schematic plan view which shows the support member used for support of the cover member of 1st Embodiment. It is a schematic plan view which shows the supporting member of a modification. It is a top view which shows the cover member for curing which concerns on 2nd Embodiment of this invention. It is action | operation explanatory drawing of the cover member of 2nd Embodiment. It is a schematic cross section which shows the state which covered the opening part of the container with a flange with the cover member for curing which concerns on 3rd Embodiment of this invention. (A) (b) is a schematic cross section which shows the positional relationship of the opening part in the flange vicinity and the outer peripheral part of a cover member in 3rd Embodiment. It is a schematic cross section which shows the state which covered the opening part of the container with a flange with the cover member for curing which concerns on 4th Embodiment of this invention. It is a schematic plan view which shows the state which covered the opening part of the container with a flange with the cover member of 4th Embodiment. (A) (b) is a top view which shows the hook member provided in a cover member in 4th Embodiment. It is a schematic cross section which shows the state which covered the opening part of the container with a flange with the cover member for curing which concerns on 5th Embodiment of this invention. It is a top view which shows the cover member of 5th Embodiment. It is a schematic cross section which shows the state which covered the opening part of the container with a flange with the cover member for curing which concerns on 6th Embodiment of this invention. In 6th Embodiment, it is a schematic cross section which shows the positional relationship of the opening part in the flange vicinity, and the outer peripheral part of a cover member.

  Hereinafter, an embodiment of a lid member for curing according to the present invention will be described with reference to the drawings. Here, in the following description, when referring to “up and down”, the direction shown in FIGS. 1 and 2 is used as a reference. Moreover, in the following embodiment, the lid member for curing used for the reactor vessel installed in the nuclear power generation facility is exemplified, but it is not intended to limit the use of the lid member for curing according to the present invention. . Moreover, the same code | symbol is attached | subjected to the same location in each embodiment, and the overlapping description is abbreviate | omitted.

(First embodiment)
As shown in FIG. 1, the lid member 1 for curing is arranged so as to cover the opening 21 of the reactor (pressure) vessel 20 that forms the core, and is a simple lid that closes the opening 21. It functions as.
The nuclear reactor vessel 20 has a bottomed cylindrical shape and is a flanged vessel having a flange portion 22 at an opening edge. A liquid W such as water is stored in the reactor vessel 20. The reactor vessel 20 has a plurality of facilities (not shown).

A plurality of stud bolts 23 are erected on the flange portion 22 in the circumferential direction. The stud bolt 23 is used when a lid (not shown) is attached to the reactor vessel 20, and is attached to the flange portion 22 in advance so that the lower portion is embedded in the flange portion 22.
In the present embodiment, a plurality of stud bolts 23 are used to hold a rope 24 that functions as a support member for supporting the lid member 1. The rope 24 is stretched between a plurality of stud bolts 23 as shown in FIG. 5 in such a manner that the rope 24 is fixed to a certain stud bolt 23 and then fixed to the stud bolt 23 on the opposite bank. It extends in a substantially star shape in plan view so as to straddle the opening 21. The rope 24 is made of a relatively thin material, and is made of a material that is not likely to rust, such as nylon (registered trademark) (made of polyamide synthetic fiber).
In addition, as shown in FIG. 6, you may stretch the rope 24 between the some stud bolts 23 so that it may become a grid | lattice form by planar view.

As shown in FIG. 4, the lid member 1 is formed in a substantially circular shape in plan view so as to have the same outer diameter as the inner diameter of the opening 21 of the reactor vessel 20. A rope insertion hole 1b is formed in the peripheral portion 1c of the lid member 1 at a predetermined interval in the circumferential direction.
The lid member 1 is made of a breathable and flame retardant sheet, and is made of a fine mesh made by weaving a chemical fiber or the like into a mesh.

As shown in FIGS. 1 and 2, such a lid member 1 is placed on a rope 24 hung over the opening 21, and as shown in FIG. 3, the fixing rope 25 is placed on the lid member 1. By passing this through the rope insertion hole 1b and winding it around a nearby stud bolt 23, it is fixed to the outside (upper side) of the opening 21 (see FIGS. 1 and 2). As a result, the opening 21 is covered with the lid member 1 and substantially closed, and the reactor vessel 20 is cured.
Here, as shown in FIG. 3, the lid member 1 is positioned and fixed so that the entire opening 21 is covered with the lid member 1 when viewed from the axially upper side of the reactor vessel 20. The Specifically, as shown in FIG. 2, the outer peripheral edge 1 a serving as the outer peripheral portion of the lid member 1 is aligned so as to be on the extension of the inner surface 20 a of the opening 21. Thereby, when viewed from the upper side in the axial direction of the nuclear reactor vessel 20, the outer peripheral edge 1 a of the lid member 1 is not hooked on the flange portion 22 (the flange portion 22 is not covered), and the opening 21 is formed by the lid member 1. It will be covered.

According to the present embodiment described above, it is possible to prevent foreign matter from being mixed into the reactor vessel 20 by the lid member 1 that is fixed so as to cover the opening 21.
In addition, the lid member 1 is aligned so that the outer peripheral edge 1 a is on the extension of the inner surface 20 a of the opening 21, and the outer peripheral edge 1 a is the flange portion 22 when viewed from the upper side in the axial direction of the reactor vessel 20. Therefore, even when condensed water is generated on the inner surface of the lid member 1, the generated condensed water is transferred through the lid member 1 and dripped into the reactor vessel 20. Thereby, it can avoid suitably that dew condensation water gets across and stays in the flange part 22 (flange surface).

(Second Embodiment)
A curing lid member according to a second embodiment of the present invention will be described with reference to FIG.
The difference between the lid member 1 of the present embodiment and that of the first embodiment is that a cut portion 11 is formed.
The cut portion 11 is a cut extending in the radial direction of the lid member 1, and the radially outer portion reaches the outer peripheral edge portion 1 a. In the present embodiment, a total of four cut portions 11 are formed at intervals of 90 degrees in the circumferential direction.

  The notch part 11 is provided with members for opening and closing the notch part 11 such as fasteners, buttons, snaps, and hooks (not shown). Thereby, if necessary, these members can be operated to turn a part of the lid member 1 to the upper surface side of the lid member 1 with the notches 11 and 11 as a boundary as shown in FIG. . In addition, although the example which opened two adjacent cut | notch parts 11 and 11 was shown in FIG. 8, you may make it open the other cut | notch part 11 and the half area | region of the cover member 1 turns.

According to the present embodiment, by closing the cut portion 11, foreign matter can be prevented from entering the reactor vessel 20, and a part of the lid member 1 can be removed from the cut portion 11 as necessary. Since the inside of the reactor vessel 20 can be exposed by turning it over, without removing the entire lid member 1 from the opening 21, visual confirmation of the inside of the reactor vessel 20 through the turned portion and articles for the reactor vessel 20 Etc. can be taken in and out.
In addition, the number of the cut | notch parts 11 is arbitrary, You may form in only one place and may form in five or more places.
Moreover, the notch part 11 is good also as a notch extended in the circumferential direction, and the formation location is good also as multiple places.

(Third embodiment)
A curing lid member according to a third embodiment of the present invention will be described with reference to FIG.
This embodiment is different from the first and second embodiments in that the lid member 1 is suspended and held using a hook F1 of a crane device (not shown).

The hook F <b> 1 is suspended from a crane device (not shown) provided on the ceiling of the building of the nuclear power generation facility and is located above the central axis of the reactor vessel 20.
The lid member 1 is supported via a hanging rope 26 hung on the hook F1, and is held in a state where the outer peripheral edge 1a of the lid member 1 enters the inner surface 20a of the opening 21.
Note that a frame member (not shown) may be provided on the lid member 1 so that the horizontal posture of the lid member 1 is maintained.

Here, as shown in FIG. 10A, the lid member 1 may be disposed in the opening 21 so that the upper surface of the flange portion 22 and the upper surface of the lid member 1 are substantially flush with each other. As shown in FIG. 10 (b), it may be arranged at a position entering the inside of the opening 21.
In any arrangement, the lid member 1 is positioned inside the opening 21 (inner surface 20a), and is arranged so that the outer peripheral edge 1a is not hung on the upper surface of the flange portion 22.

According to the present embodiment, the lid member 1 can be easily installed using equipment (hook F1) provided in a building or the like of a nuclear power generation facility.
Moreover, since the cover member 1 is in a state in which the outer peripheral edge 1a is positioned inside the opening 21, it is possible to more suitably prevent foreign matter from entering the reactor vessel 20, and the inner surface of the cover member 1 Even when condensed water is generated, the generated condensed water can be reliably dropped into the reactor vessel 20. Thereby, it can avoid reliably that dew condensation water gets across and stays in the flange part 22 (flange surface).

(Fourth embodiment)
A lid member for curing according to a fourth embodiment of the present invention will be described with reference to FIGS.
The present embodiment is different from the first to third embodiments in that the lid member 1 is fixed to the opening 21 by the locking member 12 provided on the lid member 1 without using the rope 24 or the hook F1. In the point.

  As shown in FIG. 12, the locking member 12 is a bowl-shaped member provided on the peripheral edge portion 1 c of the lid member 1, and as shown in FIGS. 11 and 12, the flange member 22 of the reactor vessel 20 The stud bolt 23 can be locked. The locking member 12 is provided at a predetermined interval in the circumferential direction of the peripheral edge portion 1c corresponding to the stud bolt 23, and is fixed to the peripheral edge portion 1c via the attachment portion 12a.

  As shown in FIG. 11, the locking member 12 allows the lid member 1 to have its outer peripheral edge 1 a partially opposed to (in contact with) the inner side (inner surface 20 a) of the opening 21. Arranged in the opening 21.

According to the present embodiment, the lid member 1 can be easily installed using the locking member 12.
Further, since the lid member 1 is positioned so that the outer peripheral edge 1a enters the inside of the opening 21, it is possible to more suitably prevent foreign matter from being mixed into the reactor vessel 20, and the lid 1 Even when condensed water is generated on the inner surface of the member 1, the generated condensed water can be reliably dripped into the reactor vessel 20. Thereby, it can avoid reliably that dew condensation water gets across and stays in the flange part 22 (flange surface).

In addition, as shown in FIG.13 (b), you may use the locking member 12 of a substantially U shape by planar view. By adopting such a substantially U-shape, the shape of the locking member 12 becomes simple, so that the advantage of being easily hooked to the stud bolt 23 is obtained.
A round-shaped locking member 12 may be used.

(Fifth embodiment)
A curing lid member according to a fifth embodiment of the present invention will be described with reference to FIGS.
The present embodiment is different from the first to fourth embodiments in that the lid member 1 is formed in a substantially conical shape with the axially upper side of the reactor vessel 20 as the top portion 13.

  The lid member 1 is formed in a substantially conical shape as described above. In order to maintain the shape, the lid member 1 includes a linear frame member 15 and an annular frame member as shown in FIG. 16 are decorated. The linear frame member 15 is attached radially in plan view with the top portion 13 as the center, and an end portion thereof is connected to the annular frame member 16. The annular frame member 16 has an outer peripheral edge portion 1a so that the outer peripheral edge portion 1a of the lid member 1 faces the inner surface 20a of the opening portion 21 and closes the opening portion 21 (contacts and closes). It plays a role of stabilizing the shape.

  As shown in FIG. 14, the lid member 1 has a top portion 13 attached to a rope 24 and is suspended from the rope 24. Thereby, the cover member 1 is positioned in a state in which the outer peripheral edge portion 1 a enters the inside of the opening portion 21 and covers the opening portion 21.

According to the present embodiment, the lid member 1 is in a state in which the outer peripheral edge portion 1a is located inside the opening portion 21, so that foreign matter can be more appropriately prevented from entering the reactor vessel 20, Even when condensed water is generated on the inner surface of the lid member 1, the generated condensed water can be reliably dropped into the reactor vessel 20. Thereby, it can avoid reliably that dew condensation water gets across and stays in the flange part 22 (flange surface).
In addition, since the inner surface of the lid member 1 is inclined toward the inner side of the opening 21, the dripping toward the inner surface 20a of the opening 21 when condensed water is generated is smoothly performed. Condensed water is difficult to stay on the inner surface.

(Sixth embodiment)
With reference to FIG. 16, FIG. 17, the cover member for curing which concerns on 6th Embodiment of this invention is demonstrated.
In this embodiment, it has the cover member 1 arrange | positioned in the reverse direction to the said 5th Embodiment.

  The lid member 1 is formed in a substantially conical shape with the axially lower side of the reactor vessel 20 as a top portion 13. A weight 14 for maintaining a substantially conical shape is disposed on the top portion 13. A locking member 12 similar to that described in the fourth embodiment is provided on the peripheral edge 1 c of the lid member 1. As shown in FIG. 17, the locking member 12 allows the lid member 1 to open so that the outer peripheral edge 1a partially faces (in contact with) the inner side (inner surface 20a) of the opening 21. 21.

According to the present embodiment, the lid member 1 is in a state in which the outer peripheral edge portion 1a is located inside the opening portion 21, so that foreign matter can be more appropriately prevented from entering the reactor vessel 20, Even when condensed water is generated on the inner surface of the lid member 1, the generated condensed water can be reliably dropped into the reactor vessel 20. Thereby, it can avoid reliably that dew condensation water gets across and stays in the flange part 22 (flange surface).
Here, since the inner surface of the lid member 1 is inclined toward the top portion 13, dripping toward the top portion 13 when the condensed water is generated is smoothly performed, and the condensed water is also formed on the inner surface of the lid member 1. It is hard to stay.

  The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  For example, in the first embodiment, the lid member 1 is configured to be supported using the rope 24. However, the present invention is not limited to this, and instead of the rope 24, a rod-like member or a net-like member is provided in the opening 21. You may comprise so that the cover member 1 may be supported over.

DESCRIPTION OF SYMBOLS 1 Lid member 1a Outer peripheral part 1c Peripheral part 11 Cut part 13 Top part 20 Reactor vessel 21 Opening part 22 Flange part 23 Stud bolt 24 Rope W Liquid

Claims (10)

  A flange is formed at the opening edge, and a lid member is formed of a breathable and flame-retardant sheet so as to have the same outer diameter as the inner diameter of the opening of the bottomed cylindrical container in which liquid is stored. A curing method for a flanged container, wherein the lid member is arranged so that the opening is covered with the lid member when viewed from the axial direction of the container.   The method for curing a flanged container according to claim 1, wherein the lid member is disposed outside the opening.   A plurality of stud bolts are erected on the flange portion, a rope is fixed to the opening portion over the plurality of stud bolts, and the lid member is placed on the rope. The said lid member is arrange | positioned on the outer side, The curing method of the container with a flange of Claim 1 characterized by the above-mentioned.   The method for curing a flanged container according to claim 1, wherein a notch is formed in the lid member, and a part of the lid member is turned from the notch to expose the inside of the container.   The curing method for a flanged container according to claim 1, wherein at least an outer peripheral portion of the lid member is disposed inside the opening.   The method for curing a flanged container according to claim 1, wherein the lid member is formed in a substantially conical shape having one end side in the axial direction of the container as a top.   A breathable and flame retardant sheet having a flange portion formed at the opening edge and disposed at the opening portion of the bottomed cylindrical container in which liquid is stored, and having the same outer diameter as the inner diameter of the opening portion. A lid member for curing which is formed by the following.   The cover member for curing according to claim 7, wherein a cut portion is formed.   The lid member for curing according to claim 7, which is formed in a flat plate shape.   The lid member for curing according to claim 7, wherein the lid member is formed in a substantially conical shape having a top portion at one end side in the axial direction of the container.

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