JP2530633Y2 - Manhole cover of panel assembled constant temperature tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a manhole cover of a panel assembled constant temperature tank.

[Conventional technology and its problems]

Recently, it has been possible to construct a large box-shaped tank by appropriately assembling a panel body with FRP plates attached to both sides of a heat insulating material made of plastic foam sandwiched by on-site construction, a panel-type heat storage tank, Panel water tank, prefabricated water tank,
It is widely known as an assembling tank or an assembling type warmer.

Since such a panel-assembled thermostatic tank is enlarged, a manhole is opened in any tank such as a water tank or a hot water tank, and therefore, a lid is attached to the manhole so as to be openable and closable (for example, Tokiko Sho 58-
No. 77189, see Japanese Utility Model Publication No. 59-106393).

By the way, many of such conventional manhole covers have hinge portions and locking portions attached at opposing positions, similarly to manhole covers used in general tanks and sewage facilities, and are provided with a hinge opening / closing type (with the hinge as a pivot point). Opening and closing).

Therefore, if the above-mentioned manhole cover for a constant temperature tank is configured to be a hinge-opening / closing type, when the cover is opened and closed so that the cover becomes thick with the heat insulating material interposed therebetween, the thick portion of the manhole cover is provided on the inner periphery of the upper end of the manhole. You will be caught.

For this reason, the conventional manhole cover for a constant temperature tank is not a hinge-opening / closing type but a lifting type (for example,
In this case, the thickness of the heat insulating material is reduced or the outer diameter of the heat insulating material is made smaller than the diameter of the opening of the manhole.

As a result, if the lifting type is used, the sealing property is impaired because the lid is placed by its own weight, and if the heat insulating material is thinned or made small in diameter by using the hinge open / close type, the heat insulating effect is reduced. Problem.

On the other hand, the manhole cover is constituted by a bowl-shaped outer cover having a hinge portion and a locking portion, and a disc-shaped inner cover pressed and sandwiched by the outer cover, and wrapping a foam. A proposal has been made which combines both a hinge opening / closing type and a lifting type (for example, see Japanese Utility Model Application Laid-Open No. 58-159296).

However, since the tank using the proposed manhole cover uses a curved panel as a unit plate,
Not only does the molding become complicated, but it also requires a cylindrical rising part integrally formed with the curved panel to open and close the hinge of the outer lid. Because it clamps, if the height of the cylindrical rising part is limited, the heat-insulating air layer formed between the outer lid and the inner lid is necessarily thinner, and in particular, the vicinity of the manhole tends to be non-insulated. There was a problem that it was not suitable as a countermeasure.

[Means for solving the problem]

Therefore, the present invention has been devised in order to solve these problems in the related art, and the gist of the invention is that the top plate of the flat panel assembly type constant temperature tank has a thickness greater than the thickness of the flat panel body. A manhole is formed by fitting a cylindrical body having a large axial length and the lower edge of the top plate and the lower edge thereof substantially coincide with each other, and a sealing material is fixed to the upper edge of the cylindrical body and the lower edge is fixed to the lower edge. A support plate having a concentric manhole opening is provided, and a plastic bowl-shaped outer lid is attached to the cylindrical body so as to be pressed against the sealing material via a hinge portion and a locking portion, while the support plate is mounted. A panel-assembled constant temperature tank characterized in that a foamed body is wrapped thereon, and the disc-shaped inner lid having a diameter smaller than the inner diameter of the cylindrical portion and larger than the manhole opening is simply placed and closed by its own weight. It is on the manhole cover.

〔Example〕

The structure of the present invention together with the operation will be described in detail with reference to the embodiment shown in the accompanying drawings.

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2 is a schematic plan view of a main part of FIG.

This embodiment is suitable for a cold water tank or a hot water tank in which a large number of heat pipes are inserted to hold cold water in the tank, and this tank is a box having a side of 3 m, another side of 1.5 m, and a height of 2.5 m. A ladder is attached to one side of the tank, and the top plate has a manhole cover (approximately 60
cmφ) is attached. In FIG. 1, reference numeral 1 denotes a top plate, 2 denotes a side plate, and 3 denotes a bottom plate. These plate members constitute a box tank T, and these plate members 1, 2, 3
Are each composed of a panel body A. The panel body A is formed by wrapping a foam 4 such as a polyurethane foam with an FRP plate 5 to form a plate. The end of the panel body A is parallel or perpendicular to the pressure receiving surface when the tank T is constructed, or the FRP plate 5 at 45 degrees.
Is provided.

Therefore, the tank T can be constructed by overlapping the flange 6 with the flange of another panel body and tightening the bolt.

For example, the panel body 1A1 of the top plate 1 and the panel body A2 of the side plate 2
In order to construct the side plate 2 and the top plate 2 as shown in FIG. 1, when the flanges 6 and 6 are overlapped with the packing 7 interposed therebetween and tightened with the bolts 8, the side plate 2 and the top plate 2 can be constructed. The corner portion where the plate 1 intersects is sealed with water. Further, in order to construct the top plate 1 with a plurality of panel bodies A1, flanges 6 extending parallel to the pressure-receiving surface of the panel body and extending outward are overlapped via a packing 7 and fastened with bolts 8. To construct each panel body A2, A3 of the side plate 2 and the bottom plate 3, the side plate 2
The flange 6 parallel to the pressure-receiving surface of the panel body A2 and the flange 6 orthogonal to the pressure-receiving surface of the panel body A3 of the bottom plate 3 are directly overlapped and fastened by bolts (not shown). in this case,
Since the flange 6 is directly superimposed, the side plate 2 and the bottom plate 3
The inside of the corner portion composed of the above is sealed with an FRP overlay (sticking a thin plate) 9.

The tank T constructed as described above is fixed on a frame 10 made of shaped steel by bolting, and the frame 10 is attached to a concrete base 11 with anchor bolts. .

Further, in order to give strength to the tank T of this embodiment, a reinforcing column 12 made of a square pipe is provided upright on the outer periphery thereof. A plurality of stays 13 are provided in the upper and lower middle portions of the reinforcing pillars 12, and the stays 13 prevent the side plate 2 from bending. In addition,
The foam 4a on which the stay 13 is located has a lower specific gravity (lower foaming ratio) than other foams, and has strength.

Here, in the present embodiment, the following manhole cover 14 is particularly employed.

That is, at a predetermined position of the panel body A1 of the top plate 1, a FRP cylindrical body 15 having an axial length approximately three times the thickness of the panel body A1 is provided.
To form a manhole. A sealing member 16 made of an elastic body is fixed to the upper edge of the cylindrical body 15.
On the outer periphery of the cylindrical body 15 protruding from the top plate 1, brackets 17 for forming hinge portions 17 and locking portions 18 are provided.
a, 18a are fixed facing each other.

On the other hand, the manhole cover 14 includes a hinge-openable outer cover 19 and a liftable inner cover 20, and the outer cover 19 is formed of FRP in a bowl shape. The outer lid 19 has a hinge rib 17b projecting inward, and the rib 17b is pin-connected to the hinge bracket 17a. Also, the outer lid 1
9 is provided with a slit for a locking portion, and the locking bracket 18a is inserted into this slit and stopped by the pin 21. Note that the structure of the hinge portion 17 and the locking portion 18 may be another structure.

A donut-shaped support plate 22 is fixed to the lower peripheral edge of the cylindrical body 15, and the inner lid 20 is placed on the support plate 22. Therefore, the space 23 forms a heat insulating layer between the inner lid 20 and the outer lid 19. The inner lid 20 is formed in a disk shape by enclosing a foam having substantially the same thickness as the panel body A with an FRP plate, and a handle 24 is provided at the center of the upper surface thereof. The support plate
A rubber packing 25 is adhered to the upper surface of the
And the inner lid 20 is prevented from slipping.

The outer diameter of the inner cover 20 is not only smaller than the inner diameter of the cylindrical body 15 as shown in FIG. 2, but also at any position (the position indicated by the two-dot chain line in FIG. 2) within the cylindrical body 15. The concentric opening (manhole opening) of the support plate 22 is sized to be always closed.

Therefore, in the case of the manhole cover 14 of the present embodiment, heat insulation is maintained by the inner cover 20, and heat insulation can also be obtained by the air layer in the space 23. In addition, the sealing performance is ensured by the outer lid 19, and the locking at the time of closing can be surely performed.

[Effect of the invention]

 According to the present invention, the following effects can be expected.

Since the inner lid is simply placed and closed by its own weight, it is of a lifting type, so that the heat insulating material of the foam of the inner lid is not made small or thin with respect to the manhole opening, so that the heat insulating property can be secured. In particular, since the diameter of the inner lid is smaller than the inner diameter of the cylindrical part and larger than the manhole opening, even if the cylindrical part becomes deep, simply placing it can close the manhole opening very easily and quickly. At the time of the closing operation, heat insulation and heat radiation can be avoided as much as possible.

Since the manhole cover is composed of a bowl-shaped outer lid and a disk-shaped inner lid, a large heat-insulating air layer is formed between the two lids, which assists the heat insulation of the foam of the inner lid as well as the heat insulation. be able to.

Since the hinge portion and the locking portion of the outer lid and the sealing material provide a sealing property, and even if the locking operation takes some time, the heat insulating property is immediately obtained by the thick inner lid foam, so that the thermostatic tank is provided. It is convenient for the manhole cover.

Since the inner lid enclosing the foam is formed in a lifting type, the hinge section is not required, which makes it extremely simple and easy to form the inner lid. In addition to the cylindrical body, the supporting plate and the flat panel, The constant temperature tank becomes cheaper.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2 is a schematic plan view of a main part of FIG. 1: top plate, 4: foam, 5: FRP plate, 15: cylindrical body, 16:
Sealing material, 17 hinge part, 18 locking part, 19 outer cover, 20 ...
Inner lid, A: panel body, T: tank.

Claims (1)

(57) [Scope of request for utility model registration] 1. A cylindrical body having an axial length larger than the thickness of the flat panel body and whose lower edge substantially coincides with the lower surface of the flat panel body is fitted to a top plate of the flat panel assembly type constant temperature tank. A manhole is formed, a sealing material is fixed to an upper edge of the cylindrical body, a support plate having a concentric manhole opening is provided on a lower edge, and a plastic bowl-shaped outer lid is provided on the cylindrical body. Via a hinge part and a locking part, while being attached so as to be pressed against the sealing material, a foam is wrapped on the support plate, and
A manhole cover for a panel assembled constant temperature tank, wherein a disc-shaped inner cover having a diameter smaller than the inner diameter of the cylindrical portion and larger than a manhole opening is simply placed and closed by its own weight.