JPH09188354A - Manhole structure of metallic liquid container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the production cost and prevent the separation of a packing, by forming a horizontal doughnut-form flange at the inflow entrance end of a top plate and setting a U-shaped horizontal doughnut-form packing in the flange. SOLUTION: A horizontal doughnut-form flange 16 is formed at the end of the inflow entrance 14 on the top plate 10 and a horizontal doughnut-form packing 17 with a U-shaped section turned sideways is set in the flange 16 and the end edge of the flange 16, the end edge side of the upper face, and the end edge side of the lower face are surrounded by the packing 17 and the manhole structure 11 is formed with a part of the top plate 10. The cover 15 is pressed on the flange 16 through the packing 17 by a manhole cover- fastening device 4 to securely retain the cut-off condition against the inflow entrance. The manufacturing cost can be reduced by manufacturing the flange 16 of the manhole structure 11 in the manufacturing process of the tank top plate 10 and further, since the packing 17 is shaped to have a horizontal doughnut-form, it is made hard to separate it from the flange 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole structure of a metallic liquid container for accommodating, transporting and storing liquid and the like.

[0002]

2. Description of the Related Art A manhole structure for a metal liquid container of this type is composed of a flange plate surrounding a top plate inlet and a lid, and the flange plate is located at a position surrounding the top plate inlet. A manhole seal structure is formed by welding and attaching a packing to the upper end of the flange extension portion, which is formed by protruding the flange extension portion in the vertical direction from the vicinity of the inflow end edge and projecting it upward.

[0003]

In the above-mentioned known manhole structure for a metallic liquid container, the need for the flange plate increases the material cost and also requires the step of welding the flange plate. There is a drawback that the manufacturing cost of the manhole becomes large. Also,
Due to the seal structure in which the packing is attached to the upper end of the flange extension, there is a drawback that the packing comes off. In order to solve the above-mentioned problems in the conventional liquid container, the present invention aims to reduce the manufacturing cost of the manhole structure by integrating the flange of the manhole structure with the top plate, and is a sealing member of the manhole structure. The task is to prevent the packing from coming off.

[0004]

According to the present invention, a horizontal donut-shaped flange is formed at an inlet end of a top plate, and a U-shaped horizontal donut-shaped packing having a U-shaped cross section is attached to the flange. The edge of the flange, the edge of the upper surface and the edge of the lower surface are surrounded by packing to form a manhole structure flange on a part of the top plate, and the packing in the manhole structure is separated from the flange by a horizontal donut shape. To provide a manhole structure of a metal liquid container, which is characterized by a packing structure for preventing.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail based on embodiments described with reference to the drawings. 1 to 3, the metal liquid container according to the present invention includes a base unit 3, a side unit 2, and
It is composed of the top unit 1. Although the base unit 3 is equipped with a fork work carrier 31 including a fork insertion port 32 and a support 33, it is similar to a known liquid container frame, but in the present invention, the bottom plate 30 of a metal tank is used.
The bottom plate 30 of the metal tank by welding the
Is integrated with the fork work platform 31. On the bottom plate 30,
Equipping the discharge port 34 at the lower end with a discharge device 34 including a hose 35 and a discharge valve 36 is similar to a known liquid container.

Further, the metal tank bottom plate 30 has an upper end portion 30a having a shape corresponding to the lower end portion of the box-shaped side surface unit 2 having a quadrangular shape in plan view and having a function as a lower end portion of the side surface outer frame. The upper ends of the support bases 33 are welded to the four corners of 30a. Tank bottom plate portion 30b of the metal tank bottom plate 30
Is inclined toward the center at a downward inclination angle of 12 degrees to facilitate the discharge of the liquid filled in the tank from the discharge port 37 at the center.

Referring to FIGS. 4 to 6, the side surface unit 2 is constructed by integrating a plurality of (four in the embodiment) metal side surface plates 20 by welding the side edges together. It has a box shape with an open top and bottom. The metal side plate 20 has functions of a tank side surface and a side surface outer frame,
A curved window surface 21 is formed in the center portion, and flat surface portions 23 forming a part of the frame column 22 are connected to both sides of the window surface 21. Further, on the upper side and the lower side of the window surface 21, flat portions 25 that form a horizontal frame 24 with the upper end portion 30a of the metal tank bottom plate 30 and the peripheral portion 10a of the metal tank top plate 10 of the top plate unit 1 are also provided. The shape is connected to each other, and the shape is similar to the front of the TV when viewed from the front.

Referring to FIGS. 3 and 7, the top plate unit 1 includes a metal tank top plate (mirror) 10 and a manhole 11.
And the peripheral portion 10a of the top plate 10 is a quadrangle in plan view corresponding to the box-shaped side unit 2. An air vent 12 is provided on the top plate 10. Supports 13 are provided at the four corners of the top plate 10 so as to project upward. The support 13 is
This is a structure in which when the containers are stacked and stacked in a plurality of upper and lower stages when the containers are transferred and stored, they are engaged with the support base 33 of the upper container. The manhole 11 is a metal tank top plate 10.
It is configured by an opening above the inflow port 14 formed in the central portion of the above, a lid 15 that can be shielded freely, and a flange 16 formed in the central portion of the metal tank top plate 10. That is, in the known metal liquid container, the flange 16 is formed as a separate member from the metal tank top plate 10 and the flange 16 is welded to the metal tank top plate 10. However, in the embodiment, the metal tank top plate is used. A doughnut-shaped horizontal flange 16 was formed at the center of 10 (the edge facing the inflow port 14), and a lateral U-shaped packing 17 was attached to the flange 16.

The upper edge of the metal tank bottom plate 30 of the base unit 3 and the lower edge of the box-shaped metal side plate 20 are welded to each other by welding the side edges to each other. Further, the upper edge of the metal side plate 20 and the metal tank top plate 1 of the top unit 1
The bottom edge of 0 is welded w. Thus, the base unit 3,
The side surface unit 2 and the top plate unit 1 are welded at their upper and lower adjacent surfaces to each other and integrated to complete a metal liquid container.

When the metal liquid container of the present invention is used, the curved window surface prevents the container from expanding in cross section due to the horizontal load due to the liquid in the container, and the upper container causes the vertical load to be applied to the frame column. Will be borne.

The upper edge of the metal tank bottom plate 30 of the stand unit 3 and the lower edge of the box-shaped metal side plate 20 are welded to each other by welding the side edges together. Further, the upper edge of the metal side plate 20 and the metal tank top plate 1 of the top unit 1
The bottom edge of 0 is welded w. Thus, the base unit 3,
The side surface unit 2 and the top plate unit 1 are welded at their upper and lower adjacent surfaces to each other and integrated to complete a metal liquid container. When using the metallic liquid container of the present invention, the curved window surface prevents the container from expanding in cross section due to the horizontal load due to the liquid in the container, and the frame pillar bears the vertical load by the upper container. .

Next, the manhole cover fastening device 4 will be described with reference to FIGS. 2, 7 and 8. A manhole cover 15 is rotatably attached to the flange 16 by means of a pivot mechanism 5 mounted on a flange 16 formed on a part of the top plate 10, and the lid 15 is centered on a spindle 18 of the pivot mechanism 5.
By turning 80 degrees, the inlet of the top plate 10 is opened,
Can be shielded freely. Three or more (four in the embodiment) tightening bolts 6 are attached to the peripheral portion of the lid 15, and the top surface of the top plate 10 is
The nut 7 is welded to the lid 15 so as to face the tightening bolts 6 respectively. By tightening the tightening bolt 6 on the nut 7 when transferring and storing the container,
The lid 15 is fixed to the nut 7 and the top plate 10. In the state where the tightening bolt 6 is tightened to the nut 7, the lid 15 presses the flange 16 which is a part of the top plate through the packing 17 and the lid 1
Make sure to maintain the shielded state of the inlet 5 at the inlet.

Next, in the embodiment, when mounting the tightening bolts 6 on the peripheral portion of the lid 15, three or more screw holes 8 for mounting the tightening bolts 6 on the peripheral portion of the lid 15 (in the embodiment, 4) are formed, the nut 9 is fixed on the upper surface of the top plate 10 so as to face each of the screw holes 8 of the lid, and the tightening bolts 6 attached to the screw holes 8 are screwed to the nut 9. The configuration. Further, the tightening bolt 6 has a head portion 6a.
A neck portion 6b having a diameter smaller than that of the screw portion is formed between the screw portion 6c and the screw portion 6c, and the screw hole 8 of the lid is opposed to the neck portion 6a upon the tightening action so that the tightening bolt 6 can freely rotate. The nut 9 can be screwed on regardless of the existence of the screw hole 8 in the lid. When mounting the tightening bolt 6, the screw portion 6c of the tightening bolt 6 and the screw hole 8 of the lid are screwed together, and the tightening bolt 6 is rotated to be inserted to the position of the neck portion 6a. As a result, the removal of the tightening bolt 6 requires a rotating operation of the tightening bolt 6, thereby preventing the tightening bolt 6 from being accidentally detached from the lid 15.

[0014]

According to the present invention, the flange of the manhole structure is formed by a part of the top plate, and the flange of the manhole structure is manufactured in the manufacturing process of the tank top plate of the metal liquid container. The cost can be reduced. Further, since the packing has a horizontal donut shape and has a packing structure that makes it difficult to separate from the flange, it is possible to prevent the separation of the packing. It has.

[Brief description of the drawings]

FIG. 1 is a front view of a metal liquid container showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a vertical cross-sectional view showing a main part of the present invention.

FIG. 4 is a front view of a side unit.

FIG. 5 is a transverse sectional view of the same.

FIG. 6 is a cross-sectional view of a metal side plate that constitutes a side unit.

FIG. 7 is a cross-sectional view of the top unit 1.

FIG. 8 is a schematic view of a manhole cover tightening device showing a top plate and a cover in a vertical cross section.

[Explanation of symbols]

 1 Top Plate Unit 2 Side Unit 3 Units 10 Metal Tank Top Plate (Mirror) 11 Manhole 15 Lid 16 Flange 17 Packing 20 Metal Side Plate 30 Metal Tank Bottom Plate

Claims (1)

[Claims] 1. In a manhole structure of a metal liquid container provided at an inlet formed on a top plate of a metal liquid container, a horizontal donut-shaped flange is formed at an inlet end portion of the top plate, and the flange is A horizontal donut-shaped packing having a U-shape in a cross-sectional view is mounted, and the edge of the flange, the edge of the upper surface and the edge of the lower surface are surrounded by the packing, and a manhole structure flange is formed by a part of the top plate. In addition, the manhole structure of the metal liquid container is characterized in that the packing in the manhole structure has a horizontal donut shape to make it difficult to separate from the flange.