JPS6149191B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an insulated tank in a liquid carrier.

Conventionally, insulated tanks for vehicles that transport liquids such as asphalt and fatty acids have a protective frame on the top of the inner tank 01 to protect the manhole formed at the top of the inner tank 01 in the event of a rollover, as shown in Figure 1. 02 is erected, and the ends of an outer tank 03 that covers the inner tank 01 are welded to the outer surface of the protective frame 02, and furthermore, at four locations on the outside of the protective frame 02, on the front, rear, left, and right sides, there is a predetermined angle or more of the tank. A side frame 04..., which prevents the manhole from being damaged by preventing it from overturning, is erected on the inner tank 01, and its upper part protrudes from the notch of the outer tank 03, so that the side frame 04...
…and the notch part are welded together and the front and rear side frames 04,0
Between 4 and 4, a running board 05 was attached to the protection frame 02 side for the worker to walk on at the top of the tank.

However, in the case of the above structure, since the inner tank is in direct contact with the high-temperature liquid contained therein, the inner tank expands and contracts in the longitudinal direction due to the heat, causing the protective frame and side frame welded to the inner tank to It will also expand and contract.

However, since the outer tank does not expand or contract, there was a problem in that stress was concentrated at the corners of the notch that was cut out to allow the side frame to protrude, causing cracks to occur. Additionally, the running boards were attached separately from the side frames, which required a great deal of time to manufacture.

The present invention is designed to solve all of the above-mentioned problems, and the following embodiments will be explained with reference to the drawings.
1 is an insulated tank mounted on a vehicle, and the insulated tank 1 has a double structure consisting of an inner tank 2 and an outer tank 3 in order to keep liquids such as asphalt and fatty acids at high temperatures.

The inner tank 2 is formed of a cylindrical portion 4 and end plates 5, 5 at both ends of the cylindrical portion 4, with a wall thickness sufficient to withstand internal pressure.

The outer tank 3 has a thinner wall thickness than the inner tank 2 and is formed so as to cover the inner tank 2 with a cylindrical portion 6 and end plates 7, 7 at both ends of the cylindrical portion 6.

The space between the inner tank 2 and the outer tank 3 is filled with a heat insulating material 8 such as glass wool to keep the inner tank 2 warm.

A manhole 9 for liquid injection is formed at the top of the inner tank 2, and a heat insulating cover 10 made of a heat insulating material is provided on this manhole 9 together with a manhole cover (not shown) to prevent heat radiation from the manhole 9. It's getting old.

Reference numerals 11 and 11 designate a pair of protective frames for preventing damage to manhole covers and the like when a vehicle overturns.The protective frames 11 and 11 have approximately the same length as the cylindrical portion 4 of the inner tank 2, and hold the manhole 9 between them. It is erected in the longitudinal direction at the upper part. A top plate 12 forming a part of the outer tank 3 is attached between the protective frames 11, 11, and a heat insulating lid 10 is attached to this top plate 12.

Reference numerals 13 and 13 designate a pair of side frames for minimizing the rollover angle and preventing damage to manhole covers and the like when the vehicle rolls over; the side frames 13 and 13 are approximately the same length as the cylindrical portion 4 of the inner tank 2 Flat part 14, 14 at the top
One end is welded to the outer surface of the protective frames 11, 11, and the other end is welded to the circumferential portion 4 of the inner tank 2.

Further, both ends of the cylindrical portion 6 of the outer tank 3 are welded in a straight line to the outer surfaces of the side frames 13, 13, respectively.

With the above configuration, the inner tank 2 is heated by the heat of the stored liquid.
Protective frame 11, 1 attached directly to inner tank 2
1 and the side frames 13, 13 expand and contract in the longitudinal direction and stress is generated between them and the outer tank 3, but both ends of the outer tank cylindrical part 6 are welded to the side frames 13, 13 in a straight line. This allows stress to be dispersed and prevents concentrated stress from occurring.

Moreover, the flat parts 14, 14 of the side frames 13, 13 can be used also as running boards for the worker to walk on.

As described above, the present invention makes the side frame attached to the inner tank approximately the same length as the cylindrical part of the inner tank, and the end of the outer tank is welded to the side surface of this side frame, thereby eliminating the notch in the outer tank. As a result, it is no longer possible to generate cracks due to concentrated stress at the corners of the cutout portion of the outer tank due to the expansion and contraction of the inner tank, as in the conventional case.

Furthermore, since the side frame can also serve as a running board, manufacturing is much easier than in the past.

[Brief explanation of the drawing]

FIG. 1 is a conventional example, FIG. 2 is an overall view, and FIG. 3 is a partial perspective view. 1 is an insulated tank, 2 is an inner tank, 3 is an outer tank, 11 is a protection frame, and 13 is a side frame.

Claims (1)

[Claims] 1. In an insulated tank for a liquid transport vehicle in which an inner tank and an outer tank are formed into a double structure, each consisting of a cylindrical part and a head plate, the upper part of the inner tank has a groove extending in the longitudinal direction of the inner tank and having approximately the same length as the cylindrical part. Protective frames are arranged on the left and right sides, sandwiching the manhole at the top of the inner tank, and a side frame, which is erected on the inner tank and has approximately the same length as the cylindrical part, is fixed to the outside of the protective frame, and the outer tank cylinder A heat insulating tank for liquid carriers whose ends are welded to the outer surface of the side frame.