JPH06336284A - Plastic container for specified combustible material - Google Patents

Abstract

PURPOSE:To make a specified combustible material container being light in weight and made at a low cost and satisfying fire protection laws and regulations. CONSTITUTION:A container body 11 is composed of a plastic and the title container is surrounded by a reinforcing material 25 so that the expansion of the container is suppressed in the peripheral direction, the lower part of the container is fixed so that the expansion of the container body 11 in pressurization is limited in the upward direction, and the expansion is used so that a manhole cover 12 is pressed via gate bar 19 to a manhole flange 17 by a gate-bar press 23 and stuck fast thereto and leakage is prevented consequently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a designated combustible material container, and more particularly to a designated combustible material container made of plastic and having an internal volume of 200 to 2000 liters which is easy to carry in a vehicle.

[0002]

2. Description of the Related Art Combustible liquids are classified into "dangerous substances" and "designated combustible substances" by the Fire Service Law. Dangerous goods
A group of highly flammable organic solvents or a mixture of highly flammable organic solvents and liquids, solid oils and fats, resins, etc., which are further classified by their flash points and have a high flammability and combustion risk. Is. The designated combustibles have a flash point, but the flash point and the combustion point are above a certain temperature, and the amount of flammable liquid is below a certain weight ratio. It is a group of articles with low properties.

A container for enclosing "hazardous substances" and loading and transporting it on a vehicle is made of metal, has a plate thickness of 3.2 mm or more, and is equipped with a pressure safety valve, a protective frame, and an emergency discharge stopping mechanism. It has been decided. As for the function, it is required that the sealed liquid inside does not leak and the container does not break in the drop test, pneumatic test, hydraulic test, and stacking test. The specifications and functions of this metal container are stipulated in the Fire Service Law. Containers handling "designated combustibles" are stipulated by local government ordinances, and as a rule, comply with the "hazardous materials" regulations of the Fire Service Law. Even if it is a "dangerous substance", its flash point is 200.
As a container for animal and vegetable oils whose temperature is ℃ or above, a bag-shaped container made of resin coated with a resin that passes the pressure test, drop test, and stacking test is recognized as a special case by the notification related to the Fire Service Act, and designated combustible materials are also accepted. It has been approved.

[0004]

However, the metal container is the best in terms of strength but has a large weight, and when the content is an aqueous liquid product, it must be made of stainless steel to prevent corrosion, There is a problem that the cost is high. In addition, the bag-like container approved by the notification related to the Fire Service Law is lightweight and advantageous in cost, but there is a high risk that the container will be pierced and damaged when using a forklift during loading and unloading. There's a problem.

An object of the present invention is to provide a designated combustible material container which is lightweight, advantageous in terms of cost, and convenient for loading and unloading.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a plastic container main body having a manhole in the upper part and a discharge valve in the lower part, and a manhole of the container main body through a packing, are mounted with a plurality of bolts, and a top surface thereof is provided with a bolt. The manhole cover provided with, the outer frame on the outside of the container body along the ridgeline of the cube, the reinforcing material surrounding the side outer peripheral surface of the container body, and the outer frame provided on the upper surface, the container body expanded A designated combustible container made of plastic, characterized in that it comprises a lantern presser that comes into contact with the lantern provided on the manhole cover and pushes it in.

[0007]

The present inventors have found that the plastic container is lightweight if it can pass various tests prescribed by the Fire Service Law, and is about 1/3 to 1/1 / the cost of stainless steel in terms of cost.
The present invention has been completed, paying attention to the fact that even if the content is an aqueous liquid product, there is no problem of corrosion and that the blade tip does not damage the container even in the operation of handling with a forklift.

According to the present invention, as a container for transportation by vehicle, a container having a capacity of 200 to 2000 liters, most commonly a capacity of about 1000 liters, is used, and a manhole is provided in the upper part and a discharge valve is provided in the lower part. ing. The opening diameter of the upper manhole is generally set to a size that an operator can put in for cleaning the inside, that is, 350 to 450 mm. The lid is a disk made of plastic or metal having a thickness of 80 to 150 mm, which is attached to the container body with a plurality of bolts via suitable elastic packing.

0.2 kg / cm ² specified by the Fire Service Law
Air pressure test, 1.0 kg / cm ² water pressure test and 8
A drop test of 0 to 130 cm (depending on the danger class) withstands pressure increase due to evaporation of contents due to temperature rise, destroys the container by collision of a vehicle carrying the container, falling of the container due to overturning, etc. It is determined by the container to have a function to prevent things from leaking out, catching fire, and causing a fire. It is difficult to pass a water pressure test of 1.0 kg / cm ² especially for a plastic container and a lid of about 1000 liter which have the conventional specifications. That is, in the method of tightening the lid of the plastic or metal flat plate with a plurality of bolts, it is necessary to tighten 12 to 16 or more bolts to the manhole having a diameter of 350 to 450 mm. 0.3-0.4kg
Water leaks from around the lid at a water pressure of / cm ² or more.
Moreover, if the packing is improperly fitted, the water may leak even if the number of bolts is large. Tightening the lid with 12 to 16 bolts is very inconvenient in terms of the actual work of removing the manhole lid every day and enclosing and transporting the product from here. It has been found that this is because when the plastic container is pressurized from the inside, the container itself expands in the peripheral and vertical directions, and in particular, the lid seal portion is distorted and the airtightness is not maintained. Here, by the reinforcing material surrounding the container,
It suppresses the expansion of the container in the peripheral direction due to internal pressurization, and lifts the lid using the expansion in the vertical direction (expansion in the upward direction because the lower part is fixed). It is possible to bring the manhole cover into close contact with the container body by bringing the canner presser provided on the upper surface into contact with the canner presser. Further, by suppressing the expansion in the peripheral direction, the strain due to the expansion of the manhole portion is reduced, and the manhole cover can be pressed and sealed to the manhole with a small number of bolts.

[0010]

The present invention will be described in more detail below with reference to examples.

FIG. 1 is a plan view of an embodiment of the present invention,
FIG. 2 is a side view when no internal pressure is applied to the container.

The container 1 is composed of a container body 11, a manhole cover 12 and a frame. The container body 11 is formed into a substantially cubic shape, and is reinforced by an outer frame along the ridgeline thereof so as to withstand a drop test. Container body 11
The lower portion 10 is formed in the shape of a quadrangular pyramid, and a discharge valve 14 is attached to the top portion 13 thereof. The discharge valve 14 has a protective frame 2
Protected by 6. Upper part 15 of container body 11
Has a cylindrical shape at its center and constitutes the manhole 16. The upper part of the manhole 16 becomes a manhole flange 17, and a bolt hole 18 is inserted there. The container body 11 is made of a plastic material, and its strength is a yield point stress of 100 kg / cm ² or more and a breaking point stress of 150 k.
Material with g / cm ² or more internal pressure 1.0 kg /
The thickness may be set to withstand at least ² cm ² . Specific examples of plastic materials include polyethylene, polypropylene, polyvinyl chloride, polycarbonate, polyethylene terephthalate, high styrene rubber, and nylon. As the material used in this example, Wurtzex # 4030 (trademark of Mitsui Petrochemical Industry Co., Ltd.), which is a kind of polyethylene, was used. The outer frame size is 1100
The container body used had a capacity of × 1100 × 1450, a capacity of 1100 liters, and a material thickness of 8 mm. The diameter of the upper manhole was 400 mm. Manhole cover 12
Used the materials and thicknesses shown in Table 1. Table 1 shows the number of mounting bolts for attaching to the manhole flange 17. On the upper surface of the manhole cover 12, 30.times.50.times.3.2 L-shaped steel was provided in a cross shape as the bolt 19, and the intersection was welded to form an integral structure, which was further welded to the manhole cover.

The frame body is composed of an upper outer frame 21, a peripheral outer frame 24 and a lower outer frame 28. In the case of this embodiment, these outer frames are made by welding 50 × 50 × 6 L-shaped steel. Then configured. Two first reinforcing frames 22 are welded to the central portion of the upper outer frame 21 as shown in FIG.
Two second reinforcing frames 23 are welded to each of the two
The reinforcing frame acted as a presser foot. Lower outer frame 28
A protective frame 26 is welded to the protective frame 26 to protect the discharge valve. In this embodiment, the first reinforcing member 22, the second reinforcing member 23, and the protective frame 26 are made of the same 50 × 50 × 6 L-shaped steel as the outer frame. The outer peripheral surface of the container body 11 has a container body 11 for suppressing lateral expansion of the container body 11.
Reinforcing material 25 composed of a square pipe of 30 × 50 × 3.2 that surrounds is provided at two locations. In addition, in the lower outer frame 28,
It is preferable to provide a structure in which the claws of a forklift (not shown) can be inserted.

A container body 1 with a frame body produced as described above
The manhole cover 19 shown in Table 1 was attached to No. 1 and a water pressure test and a drop test were performed. The results are shown in Table 1 as a comparative example together with the results of the case where the same container body 11 is used and the bolt 19 is not used.

[0015]

[Table 1]

Test method (method stipulated by the Fire Service Law) (1) Water pressure 1 kg / cm ² test First of all, a full internal volume (about 1100 liters) of water is poured into a container, and the manhole cover is sealed. Next, water is injected by a gear pump until the pressure gauge attached to the container exceeds 1.0 kg / cm ² . Hold at a pressure of 1.0 kg / cm ² for 15 minutes or more. During pressurization and 1.0 kg /
While holding at a pressure of cm ² or more for 15 minutes, inspect the container for damage and leakage of contents (water).

(2) 80 cm high drop test Inject 98% of the content (water) to the internal volume (about 1100 liters) and seal the manhole cover. Raise the four corners of the reinforcing frame of the container to one hook with rope. Instantly drop onto a concrete floor from a height of 80 cm. Check for damage to the container and leakage of contents (water) during and after dropping.

From the results shown in Table 1, it can be seen that in Examples 1 and 2 having the baring mechanism of the present invention, the manhole cover can be tightened with as few as eight bolts to sufficiently withstand the water pressure test and the drop test. In Comparative Example 1 in which the manhole cover was screwed, the length of the screw (corresponding to the thickness of the cover) was small in spite of the large diameter of the screw, and neither the water pressure test nor the drop test could withstand. Comparative Example 2 of the present invention without a pulling mechanism
Nos. 4 to 4 were lids of the same material and the same thickness, and when the number of bolts was the same, water leakage occurred at 0.4 kg / cm ² , and the leakage did not stop even when tightening. When the number of bolts was doubled to 16, there were several slight water leaks during boosting, and by tightening the bolts near the water leak points, it was possible to prevent water leaks at 1 kg / cm ² . . 3 shows the container body 11
When the pressure is applied to the inside, the boot 19 and the presser foot 2
It is sectional drawing which shows the relationship of 3. In addition, the interval between the presser bar 19 and the presser foot 23 when not pressurized is 0.4 in the container body.
When the internal pressure of kg / cm ² is applied, both are in contact with each other 3
It is preferably 0 to 150 mm, and in this embodiment, it is about 50 mm.

Although the shape of the barnacle 19 is a cross shape in this embodiment, the shape shown in FIG. 4 can be exemplified. Further, the bolt 19 may be placed on the manhole cover without welding. In addition, if a bar is provided, the manhole cover may be screwed in if internal pressure is applied, and it is not necessary to tighten it with bolts, but vibration and collision during transportation when internal pressure does not act on the container body Considering that the lid will come off due to such reasons, it is preferable to tighten it with about 6 to 8 bolts.

The shape of the container body may be a cylindrical shape or a regular polygonal column shape in addition to the substantially cubic shape of this embodiment.

[0021]

As described above, according to the present invention, by utilizing the fact that the plastic container expands when an internal pressure is applied, the expansion in the peripheral direction is suppressed by the reinforcing material, and the lower part is fixed so that only the upward direction is achieved. It is possible to inflate and press the manhole cover through the bolt by the expansion so that the manhole cover and the container body are brought into close contact with each other at the time of pressurization, and leakage from between them can be prevented. As a result, the pressure resistance of the plastic container can be improved, and a light designated combustible material container that passes the fire regulations can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a side view showing a state in which internal pressure is not applied to the container body.

FIG. 3 is a side view showing a state where internal pressure is applied to the container body.

FIG. 4 is a plan view of another embodiment of the present invention.

[Explanation of symbols]

 1 Specified combustible material container 11 Container body 12 Manhole cover 16 Manhole 17 Manhole flange 19 Kanuki 21 Upper outer frame 22 First reinforcement 23 Second reinforcement 24 Side outer frame 25 Reinforcement

Claims (1)

[Claims] 1. A container main body made of plastic having a manhole in the upper part and a discharge valve in the lower part, a manhole cover which is attached to the manhole of the container main body with a plurality of bolts through a packing, and a top of which has a bolt hole, and a container. An outer frame that is outside the main body and extends along the ridgeline of the cube, a reinforcing material that surrounds the outer peripheral surface of the container body, and a top cover of the outer frame that is provided on the manhole cover when the container main body expands. A designated combustible container made of plastic, which comprises a presser foot which comes into contact with and pushes it in.