JPH0240399Y2 - - Google Patents

Description

[Detailed explanation of the invention] Industrial application field This invention is for LP gas containers, more specifically, 20Kg or more, 50
Three-part steel LP that can be filled with LP gas weighing less than Kg
Regarding gas containers, it is possible to significantly reduce the weight compared to conventional ones, making it easier to handle, and also making it easier to stamp the container at the time of re-inspecting the container.

Conventional technology In the past, steel LP gas containers were usually manufactured using steel plates with a thickness of 3.2 mm, and large 50 kg containers (containers that can be filled with 50 kg of LP gas) were manufactured in a cylindrical shape. A three-part container is manufactured by combining and welding the open ends of a sky mirror and a ground mirror formed by deep-drawing a cylinder to the upper and lower open ends of the body plate. Applicable
In a 50Kg container of LP gas, the container weight alone is 41Kg.
When filled with 50 kg of LP gas, it weighs 91 kg.

The handling of these LP gas containers requires manual labor for filling the gas, transporting and moving the containers, and as mentioned above, the containers are too heavy, making back pain among employees an occupational disease in the LP gas industry. It has become

Although there is a strong desire for a container that is as light as possible for the above reasons, it is not possible to easily reduce the weight for the following reasons. That is, in order to form the container into the three-part structure described above, it is necessary to form the sky mirror and the ground mirror by drawing, and the drawing process reduces the wall thickness by a minimum of 0.2 mm.

In addition, the sky mirror part (container shoulder part) where the wall thickness decrease occurs.
According to the High Pressure Gas Control Law, it is mandatory to stamp a specified stamp on the gas, and the depth of the stamp must be at least 0.3.
A depth of about mm is required, and the depth is usually 0.3 to 0.5 mm. Therefore, in addition to the wall thickness reduction due to the drawing process mentioned above, there will be a reduction of about 0.5 to 0.7 mm, and since the minimum wall thickness of the container is stipulated by the High Pressure Gas Control Law, the current plate thickness (3.2 mm) It has been impossible to reduce the weight by making the wall thinner.

Additionally, the law requires containers to be re-inspected every four or five years depending on their capacity, and if they pass the re-inspection, they must be engraved with a designated stamp. However, because conventional containers are deep-drawn, the steel plate material becomes harder and the wall thickness becomes thinner, so when stamped, the surface tends to be dented or cannot be stamped clearly, making it difficult for re-inspection laboratories. I'm used to working.

As described above, conventional containers made of steel plates have various problems, so for example, containers made of aluminum alloy are also made in order to reduce weight, but in this case, the high cost of aluminum alloy material and the manufacturing Due to technical difficulties,
The price of containers has become extremely high, 5 to 6 times that of steel containers,
There were problems from an economic standpoint.

Purpose of the invention This invention was made in view of the above-mentioned problems, and among the two major factors of wall thickness reduction mentioned above, the wall thickness reduction due to stamping is reduced to 0 by attaching a steel nameplate. Therefore, it is possible to make the plate thickness thinner than before, and the LP gas container can be made lighter by using thin high-tensile steel plates, especially,
Suitable for use in large 50Kg containers with three parts.
The purpose is to provide LP gas containers.

Structure of the invention In order to achieve the above object, in this invention, a cylindrical container body plate is processed using a thin high-tensile steel plate, and a sky mirror and a ground mirror are formed by deep drawing. An LP gas container characterized in that a sky mirror and a ground mirror are welded to form a three-part container, and a steel plate nameplate on which a legal stamp and a re-inspection stamp are engraved is attached to the sky mirror by welding. It provides:

The above LP gas container is suitable for large containers with an LP gas capacity of 50 kg or more, and instead of the conventionally used mild steel plate, it has a tensile strength of 45 kg/mm ² with good deep drawability and weldability. As described above, we can manufacture a melting vessel using high-strength steel with a plate thickness of 2.5 mm or less, thereby reducing the weight of the container by more than 20% compared to conventional ones, and avoiding the reduction in wall thickness due to legal stamping. In order to facilitate stamping, instead of directly stamping on the container, a nameplate made of mild steel plate is welded and attached to the container, and the legal stamp is stamped on the nameplate.

Embodiments Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

As shown in Figure 1, the container includes a body plate 1, a sky mirror 2,
It consists of a three-part structure in which the open ends of the sky mirror 2 and the ground mirror 3 are combined and welded to the upper and lower sides of a cylindrical body plate 1, and 50 kg of LP gas is stored in the container 1. The capacity is such that it can be filled. A name plate 4 is attached to the sky mirror 2 (shoulder part) of the container 1 by welding.

The body plate 1, sky mirror 2, and base mirror 3 are formed by processing a thin high-tensile steel plate with a thickness of 2.5 mm and a tensile strength of 45 kg/mm ² or more with good deep drawability and weldability. . By using a high-tensile steel plate with excellent deep drawability and weldability, the plate thickness can be reduced from the conventional 3.2 mm to 2.5 mm or less. The weight has been reduced from the conventional approx. 41kg to approx. 33kg or less, i.e.
It is possible to reduce weight by more than 7kg, or more than 20%.

In addition, a name plate 4 is welded to the shoulder (sky mirror) of the container, and a legal stamp is engraved on the name plate 4. Therefore, since there is no reduction in wall thickness that occurs when directly stamping on containers as in the past, it is possible to use plate materials with a thickness of 2.5 mm or less as described above. Furthermore, since the nameplate 4 is provided separately from the container, its thickness can be freely selected, and since it is made of a mild steel plate, it is possible to engrave a deep stamp desired by the container user. I can do it. As shown in Figure 2, on the nameplate 4, in addition to the legal stamp (A in the figure) at the time of container manufacture, there is a re-inspection stamp stamped part B.
is provided in advance, and the stamping part B has a shape structure that allows easy stamping and container management. still,
The shape of the nameplate shown in FIG. 3 can be selected as appropriate.

Effects of the invention As is clear from the above explanation, the LP gas container according to the invention has the following effects.

a The weight of the container can be significantly reduced compared to conventional steel containers; for example, a 50Kg container is more than 7Kg, or more than 20% lighter, making it easier to transport by hand,
It is easier to handle and helps prevent back pain among employees.

b The above nameplate is made of a soft steel plate, and the thickness can be freely selected, so it is possible to make an impression that is easy to engrave and read. In addition, since the shape of the nameplate is such that it is easy to engrave a stamp at the time of re-inspection, one of the difficult tasks in re-inspection work can be solved.

c When transporting and delivering containers by truck, only a limited number of containers can be loaded due to loading weight restrictions, but by using the container of this invention, the loading capacity can be increased by approximately 10% or more, making transportation easier. can be rationalized.

d Manufacture the container using a steel plate thinner than 3.2 mm,
By separately providing an engraved name plate and welding it to the container, it is possible to use a thinner plate as the container material, making the container lighter and maintaining the same container quality as conventional products.

[Brief explanation of the drawing]

Figure 1 is a front view of the LP gas container according to the present invention.
FIG. 2 is a partially enlarged view of the container shown in FIG. 1, and FIG. 3 shows a modification of FIG. 2. 1... body plate, 2... sky mirror, 3... ground mirror, 4...
Nameplate, A...Legal stamp part, B...Re-inspection stamp part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A cylindrical container body plate is processed using a thin high-tensile steel plate, and a sky mirror and a ground mirror are formed by deep drawing. Welding the ground mirror to form a three-part container,
An LP gas container characterized in that a steel plate nameplate on which a determination stamp and a re-inspection stamp are engraved is attached to the above-mentioned sky mirror by welding. (2) The container described in claim (1) for utility model registration is:
An LP gas container characterized by having an LP gas capacity of 20 kg or more.