JPH0447110Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a water drain nozzle at the bottom of a tank in an oil tank or a dry gas holder.

(Conventional technology) The water drain nozzle at the bottom of the tank in the conventional example is
For example, there are siphon-type nozzles and elbow-type nozzles disclosed in JISB8501, or a storage tank bottom drainage nozzle disclosed in Japanese Utility Model Publication No. 18614/1983.
The storage tank bottom drainage nozzle disclosed in Utility Model Publication No. 18614/1986 is formed by using a tank bottom plate, and a protrusion is provided to form the tank bottom plate, and a semicircular cross section or A square tubular body is placed face down, one end is welded to the tank side plate to communicate with the inside of the tank, and the other end is constricted and connected to a tubular body with a circular cross section equipped with a valve. .

(Problems to be solved by the invention) Conventional siphon-type nozzles have the problem that residual liquid remains in the tank, and elbow-type nozzles have the problem that the part that protrudes from the bottom of the tank bottom plate is damaged by earthquakes, etc. There was a point.

In addition, in the storage tank bottom drainage nozzle disclosed in Utility Model Publication No. 18614/1983, a tubular body with a semicircular or square cross section is connected to a tubular body with a circular cross section, so the manufacturing of the tubular body is complicated and deformation occurs at the same time. There was a problem in that the welding work on the joints was difficult and welding defects were likely to occur.

(Means for Solving the Problems) In this invention, an open channel-like structure in which a ridgeline portion is connected by an arcuate curved surface is formed on the upper surface of a protrusion formed by integrally extending a part of a tank bottom plate to a predetermined width. A furnace-shaped outflow guide member is welded to form a communication passage whose one end communicates with the inside of the tank, and a flange formed by screwing a blind plate onto the open end of the communication passage is provided.
A cylindrical pipe is provided below the flange at a position lower than the tank bottom plate, and a valve is provided at the open end of the cylindrical pipe to draw out drain water, etc. from the bottom of the tank. It is something.

(Function) Since the cylindrical tube with the valve is fixed at a position lower than the top of the tank bottom plate, no residual liquid remains in the tank.

There is no protruding part of the tank foundation on the lower surface of the tank bottom plate, so there is no damage to this part due to earthquakes, etc.

Since there is no so-called constricted part where the cross-sectional shape gradually deforms in the connection between the communicating path and the cylindrical pipe, welding is easy and the occurrence of defects can be suppressed.

(Example) Examples will be described with reference to the drawings.

FIG. 1 is a partial perspective view of a tank drain nozzle portion, and FIG. 2 is a partial sectional view of the same portion. In the figure, 1 is a tank base, 2 is a tank bottom plate, 3 is a protrusion, 4 is a side plate, 5 is an outflow guide member, 6 is a flange, 7 is a communication passage, 8 is a cylindrical pipe, and 9 is a valve.

The protrusion 3 is formed by integrally extending a part of the tank bottom plate 2 in the shape of a width plate in the radial direction. The protrusion 3
The width is approximately 30 cm wider on one side than the outer circumferential length of the reinforcing plate 11 that reinforces the opening edge of the side plate 4. Further, the protruding length of the protruding portion 3 is determined such that the lower end of the flange portion 6 does not come into contact with the tank foundation 1.

The outflow guide member 5 is formed into a trapezoidal open channel shape in which the ridgeline portion is connected by an arcuate curved surface, and the opening side edge is fixed to the upper surface of the protruding portion 3 by seal welding, and one end edge is connected to the opening of the side plate 4. A reinforcing plate 11 is provided on the edge and fixed by welding. It is shaped like a furnace in cross section.

The protrusion 3 and the outflow guide member 5 form a communication path 7 that communicates with the inside of the tank. In this case, the cross-sectional shape of the communicating path 7 may be semicircular, square, or U-shaped. The open end of the communication path 7 is formed by providing a flange 12, and a blind plate 1 provided with a cylindrical tube 8 and a valve 9 fixed to one end of the cylindrical tube 8.
3 is screwed and fixed to the flange portion 6.

The blind plate 13 is formed to have the same thickness as the flange 12 or a thicker plate. The cylindrical tube 8 is provided in communication with the communication path 7 near the central lower end of the blind plate 13 so that the lower inner surface of the cylindrical tube 8 is located below the upper surface of the tank bottom plate 2. In this case, the valve 9 with a welded connection at the cylindrical tube 8 can be directly welded and fixed.

(Effects) Since this invention is configured as explained above, it produces the following effects.

Forming a communication path during manufacturing and welding the cylindrical tube become easier, and it becomes possible to provide a tank drain nozzle without welding defects.

The cylindrical pipe and valve are located below the top of the tank bottom plate, so there is no risk of residual liquid, and since there are no parts that protrude into the tank foundation, they are resistant to external forces such as earthquakes, and are easy to maintain during open inspections. It has the practical benefit of being easy to work with.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of a tank drain nozzle portion, and FIG. 2 is a partial sectional view of the same portion. 2...Tank bottom plate, 3...Protrusion part, 4...Side plate, 5...Outflow guide member, 6...Flange part,
7...Communication path, 8...Cylindrical pipe, 9...Valve.

Claims (1)

[Scope of utility model registration request] A protruding part formed by integrally extending a part of the tank bottom plate to a predetermined width, and an outflow guide member formed in an open channel-like cross-sectional shape in which the ridgeline part is connected with an arcuate curved surface are provided, and on the upper surface of the protruding part. A communication path is formed by welding the opening side edge of the outflow guide member, and one end is welded and fixed to the opening of the tank side plate to open into the tank, and a blind plate is screwed to the other end of the communication path. A flange portion formed by bonding and joining is provided, one end of the cylindrical tube is welded and fixed at a position lower than the upper surface of the bottom plate protrusion at the bottom of the flange portion to communicate with the inside of the communication path, and the other end of the cylindrical tube is connected to the inside of the communication path. A tank water drain nozzle characterized by being formed with a valve.