JPS599435B2 - thermal container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat insulating container characterized by a method of attaching a heat insulating cover for keeping containers such as drums or tanks warm.

More specifically, when covering the heat insulating material used to keep drums or tanks warm, by constructing the cover with a metal plate with a corrugated structure, it is possible to follow the expansion and contraction of the drum or tanks due to heat. This reduces stress corrosion, and since there is no need for joint processing unlike conventional construction methods, no damage occurs to the area, reducing corrosion and improving the durability of the heat insulating cover. It provides a heat insulating container.

The wavy structure mentioned here includes square waves or wavy structures.

Traditionally, asbestos,
A heat insulating material such as rock wool is affixed and fixed with a steel wire wrapped around it, and bolts, etc. embedded in the body of the drum or tank are used to prevent the heat insulating material from falling off, and a flat plate is used for the cover. was. However, with this construction method, there is a problem with the durability of the heat insulating cover. In other words, from a conventional perspective, as long as the main body does not rust, the heat insulating cover should simply serve to protect the heat insulating material, and even if it corrodes to some extent, it is easy to replace it at any time, so it has not been given much consideration. This is the reality.

In particular, the reason why the durability of the thermal cover decreases is that the drum or tank receives high or low temperature gases or solid substances, so the main body expands and contracts frequently, which causes extreme internal stress in the material. Sprays and promotes corrosion.

Furthermore, this is because corrosion occurs in the part due to damage caused by joint processing. Therefore, the heat insulating cover used for heat retention must be designed to follow the expansion and contraction of the main body and to minimize the number of processed parts. However, because the insulation cover used in conventional insulation construction methods is a flat plate, expansion and contraction in the circumferential and axial directions of drums or tanks is not considered at all, and there are many parts that stop the insulation material. The need for joint processing of the stud bolts and heat insulating cover caused damage to the main body and the heat insulating cover, and as a result, stress corrosion due to expansion and contraction and early corrosion near the joint process and the stud bolts were unavoidable. be.

As a result of various studies in order to eliminate this defect, the inventors of the present invention found that
In particular, the thermal cover follows the expansion and contraction of the main body over a wide range,
As a result, we have completed an economically preferable insulation construction method that reduces the internal stress that causes corrosion, eliminates the need for stud bolts that hold the insulation material in place, and also prevents corrosion of the parts due to the joint processing of the insulation cover. I have come to the conclusion.

Here, the construction method of the present invention will be explained in detail with reference to illustrated embodiments.

Figure 1 is a schematic diagram of the main body, Figure 2 is a schematic diagram of the main body (Figure 1)
3 is a detailed view of four locations in FIG. 2, FIG. 4 is a detailed view of six locations in FIG. 2, and FIG. 5 is a detailed diagram of eight locations in FIG. 1.

The construction procedure is as follows: First, lugs 6 are welded to the body of the main body 1 at regular intervals, and L-shaped heat retaining rings 2 are attached to each block with bolts and nuts 5.

In this case, the mounting hole of the lug 6 of the heat retaining ring expands,
In consideration of shrinkage, make a long hole in the circumferential direction of the drum or tank. (See Figure 3) This heat retaining ring 2 can also serve as a reinforcing material for the main body.

As the heat insulating material 9, highly flexible asbestos, rock wool, or the like is pasted on the main body, and if necessary, a steel wire, preferably a stainless steel wire, is wrapped around and fixed to prevent it from falling off. Next, a metal plate having a square wave structure is used as a heat insulating cover 3 for covering the heat insulating material, and the top of the metal plate is fixed to the protection receiving ring 2 with cross screws 7.

(See Figure 5).Furthermore, the lowest part of the metal plate is fixed with a hexagonal screw 8, and the mounting holes are designed in consideration of vertical expansion and contraction.
The hole should be long in the axial direction of the drum or tank. Further, as shown in FIG. 4, the overlapping width of the metal plates in the circumferential direction is sufficient by simply overlapping the troughs of the metal plates and fixing them with fixing screws.
Conventionally, this joint part was caulked, but there is no need to do so. Therefore, there is no material damage due to joint processing. This became possible for the first time by using a metal plate with a corrugated structure for the thermal cover. In this case, especially if the metal plates have a square wave structure, the seams can be easily made when joining the metal plates. In particular, the present invention makes it possible to follow expansion and contraction in the circumferential direction, which has not been considered at all in the past, thereby alleviating the internal stress that the heat insulating cover itself receives.

Furthermore, the L-shaped heat retaining ring 2 is divided into equal intervals in the circumferential direction, allowing the main body itself to expand and contract freely, and the mounting holes for fixing the lugs 6 attached to the main body are made into elongated holes in the circumferential direction. This further helps to relieve the internal stress of the heat insulating cover in the same direction. Furthermore, in order to follow the vertical movement due to expansion and contraction of the drum or tank in the axial direction, the bottom mounting opening of the heat insulating cover attached to the main body is made into an elongated hole in the axial direction, so that the drum or tank can be attached to the heat insulating cover itself. Construction should be done in such a way that unreasonable stress is not applied in the axial direction of the material.

In the drawings, an embodiment using a metal plate having an angular wave structure has been described, but a metal plate having a wave structure can be used in the same manner. The metal plate with a corrugated structure used as a heat insulating cover may be an iron plate that is intended to be painted. Other galvanized or tin-plated steel plates obtained by chemically treating stainless steel plates or iron plates can also be used in the same way. Which one to use may be selected in consideration of workability and economic efficiency. The pitch of the square wave is 1001]! The depth of the waves before and after is 20-100j! It is okay to use one with a rank of 1, and other mountains 100
It may have a shape of around n or around 20 to 3011 troughs. They may be selected appropriately depending on the shape, size, etc. of the drum or tank. When using a corrugated plate, JIS-G-3
302 galvanized iron plate or JIS-0-3312 colored galvanized iron plate may be used, but depending on the shape of the drum or tank,
The pitch and depth of the waves may be arbitrarily determined depending on the size. The conventional construction method required a large number of stud bolts to prevent the insulation material from shifting, but according to the construction method of the present invention, a metal plate with a corrugated structure is used for the insulation cover, and a insulation receiving ring is used to attach it. Since it is installed, it is only necessary to wrap the heat insulating material with metal wire, and there is no need to join the heat insulating cover, so damage to the material can be avoided to the utmost.

Therefore, the durability of the thermal cover itself has been significantly improved, making it easier to repair and repair.
It is economical because the frequency of replacement is reduced, and the construction method is simpler than conventional construction methods.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the main body, Fig. 2 is a cross-sectional view taken along line AA of the schematic diagram of the main body (Fig. 1), Fig. 3 is a point A in Fig. 2, Fig. 4 A, Cap Fig. 2 FIG. 5 is a detailed view of point B in FIG. 1. 1...Main body, 2...Heat retaining ring,
3... Heat insulation cover (metal plate with square wave structure)
, 4...Insulation receiving ring installation port, 5...
・Bolt nut, 6...rag, 7...
Cross screw, 8...Hexagonal screw, 9...Heat insulation material.

Claims (1)

[Claims] 1 Paste heat insulating material on containers such as drums or tanks,
Furthermore, in the heat insulating container that covers the heat insulating material, a heat insulating ring 2 divided at equal intervals in the circumferential direction is provided on the main body of the container on lugs 6 provided at regular intervals. Bolt nut 5 through hole lug mounting hole
Furthermore, the top of the metal plate 3 having a corrugated structure is fixed to the heat retaining ring, and the screws are inserted into the heat retaining ring through an elongated screw mounting hole in the axial direction of the container provided at the bottom of the metal plate. 8. A heat-insulating container with a closed heat-insulating cover.