JP2000007090A - Nozzle device for tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for a heating process after welding, by attaching a nozzle to the opening of the side plate of a tank without directly welding it. SOLUTION: In the side plate 1 of a tank, an opening 5 larger than a side nozzle 2a is provided. To the edge of the opening 5, a holder tube 6 is attached facing front. Into the holder tube 6, a side nozzle 2a integrated with an internal pipe 2b and an external pipe 2c is inserted. The leading end of the holder tube 6 is fixed to the side nozzle 2a with a flange 7. Inside the side plate 1, a lug 8 is fixed to the external wall part of the side nozzle 2a, and the leading end part of the lug 8 is attached to a bracket 9, fixed detachably to the internal face of the side plate 1, with a bolt 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle device for easily replacing a nozzle provided through an outer plate of a tank.

[0002]

2. Description of the Related Art In tanks for storing dangerous substances such as crude oil and heavy oil, or liquids such as water, pipes for receiving and discharging contents are connected via nozzles. That is, as shown in an example of an oil storage tank provided with a side nozzle in FIG. 4, a side nozzle 2a is disposed through a side plate 1 which is an outer plate of the tank, is reinforced by a reinforcing plate 3, and the side nozzle 2a is reinforced. The internal pipe 2b and the external pipe 2c are integrally connected to form a pipe 2. Reference numeral 4 denotes an annular plate serving as a bottom plate of the tank.

[0003] In the above-mentioned oil storage tank, in particular, in a cold region, a heating fluid is caused to flow through the pipe 2 in order to prevent crude oil and the like as contents from solidifying. Since it acts to promote the corrosion of the pipe 2, it is one of the causes of corrosion of the inner wall surface of the side nozzle 2a.

[0004] In the case of the side nozzle 2a, the thinned portion due to corrosion of the outer wall surface or the like can be restored to the original thickness by performing overlaying repair by welding, but repairing by welding the inner wall surface is not possible. In the case of a small-diameter pipe, it is difficult because welding equipment does not enter inside. Further, even when cleaning is performed, the position of corrosion or the like on the inner wall surface cannot be accurately determined, so that it was not possible to confirm whether rust or the like was completely removed. Therefore, conventionally, when corrosion is detected, the side nozzle 2a is replaced.

[0005]

However, the side nozzle 2
When a is replaced, the old side nozzle 2a is removed from the side plate 1 and the new side nozzle 2a is welded to the side plate 1, so that heat treatment is required after welding, and the construction is large. That is, in the case of a steel oil storage tank, according to JIS B8501, the nozzle attached to the opening hole, the wedge of the manhole, after welding, in order to remove adverse effects due to residual stress, for example, after heating,
Post-weld heat treatment such as slow cooling after holding the temperature for a certain period of time is performed.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a nozzle device for a tank which can eliminate the need for heat treatment after welding even if the nozzle is replaced.

[0007]

According to the present invention, in order to solve the above-mentioned problems, an opening having a required diameter larger than the outer diameter of the nozzle is provided at a position where the tank outer plate penetrates the nozzle.
A flange is provided on an outer wall portion of a nozzle which is fixedly provided at a base end portion of a holder tube protruding a required length to the outside of the tank outer plate, is inserted through the holder tube, and communicates integrally with an internal pipe and an external pipe. Fixing the tip of the holder tube to the flange,
A lug having a length capable of passing through the inside of the opening is protruded from an outer wall portion of the nozzle located inside the tank outer plate, and a tip of the lug is fixed to an inner surface of the tank outer plate. It is configured to be detachably attached to the bracket that has been set.

When removing the nozzle, the nozzle is cut from the internal pipe and the external pipe, and the vicinity of the tip of the holder pipe is cut in the circumferential direction. Further, the lug is removed from the bracket to remove the nozzle from the tank outer plate. To pull it out. When the nozzle is mounted, the procedure can be performed in a reverse procedure to the above. At this time, the nozzle is not directly welded to the opening of the tank outer plate, so that heat treatment after welding is unnecessary.

Further, instead of detachably attaching the lug to a bracket fixed to the inner surface of the tank outer plate, the tip of the lug extends to the inner surface of the tank outer plate and is directly fixed to the tank outer plate. In the case of such a configuration, the nozzle is cut from the internal pipe and the external pipe, the inner peripheral part of the flange is cut, and the vicinity of the tip of the lug is further cut, so that the nozzle is positioned inside the tank outer plate. By pulling out the nozzle, the nozzle can be removed.

Further, the flange provided on the outer wall of the nozzle and the tip of the holder tube are fixed to each other by connecting the flange provided on the outer wall of the nozzle to the flange provided on the tip of the holder tube. If the connection is made by a joint and the nozzle is connected to the internal pipe and the external pipe by a flange joint, disassemble each flange joint, remove the lug from the bracket, and connect the nozzle to the tank outer plate. By pulling out outwardly, the nozzle can be removed, in which case no welding is required when mounting the nozzle.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1A and 1B show an embodiment of the present invention. In a liquid storage tank such as an oil storage tank similar to that shown in FIG. 4, a nozzle penetrating a side plate 1 and a reinforcing plate 3 is used. An opening 5 having a required diameter larger than that of the side nozzle 2a is provided at the position, and a base end portion of a holder tube 6 of a required length disposed so as to protrude outside the side plate 1 is provided on the inner surface of the opening 5. It is inserted and fixed by welding, and a side nozzle 2a integrally connected to the internal pipe 2b and the external pipe 2c is inserted into the holder pipe 6 to form a double pipe structure by the side nozzle 2a and the holder pipe 6. And a flange 7 is provided on the outer wall portion of the side nozzle 2 a located outside the side plate 1,
The tip of the holder tube 6 is fixed, and the side plate 1 is fixed.
The opening 5 is provided on the outer wall of the side nozzle 2a located inside the
A plurality of lugs 8 having a length protruding to a position smaller than the inner diameter of the lug 8 are fixed in the radial direction. It is configured to be detachably attached via FIG.
4A and 4B, the same parts as those in FIG. 4 are denoted by the same reference numerals.

When the side nozzle 2a is to be removed, the side nozzle 2a is cut from the inner pipe 2b and the outer pipe 2c, the vicinity of the tip of the holder pipe 6 is cut in the circumferential direction, and the lug 8 is removed from the bracket 9. After moving the external pipe 2c, the side nozzle 2a is pulled out of the side plate 1, and the holder pipe 6 is left on the side plate 1 as shown in FIG. On the other hand, when the side nozzle 2a is attached, the procedure is performed in a procedure reverse to the above procedure.

As described above, since the side nozzle 2a can be easily removed, it is possible to take it back to the factory.
For example, base treatment such as rust removal and pickling can be easily performed. Therefore, a detailed inspection can be performed, and the determination of reuse or replacement can be made easily and accurately. In addition, since there is no direct welding to the opening 4 of the side plate 1 in attaching the side nozzle 2a, heat treatment after welding is unnecessary, and large-scale preparation can be eliminated.

Next, FIGS. 2A and 2B show another embodiment of the present invention. In a configuration similar to that shown in FIGS. Instead of detachably attaching the tip to a bracket 9 fixedly mounted on the inner surface of the side plate 1 with a bolt 10, the tip of the lug 8 is attached to the side plate 1.
And is fixed directly to the side plate 1.

In the configuration shown in FIG. 2A, when removing the side nozzle 2a, as shown in FIG. 2B, the side nozzle 2a is cut off from the internal pipe 2b and the external pipe 2c, and the flange 7 is removed. Is cut off, and the vicinity of the tip of the lug 8 is cut off. Thereby, the side nozzle 2a
Can be pulled out to the inside of the side plate 1 and removed.

FIGS. 3 (a) and 3 (b) show still another embodiment of the present invention. In a configuration similar to that shown in FIGS. 1 (a) and 1 (b), the side nozzle 2a Instead of fixing the flange 7 of the outer wall and the tip of the holder pipe 6 by welding, the same flange 11a as the flange 7 of the outer wall of the side nozzle 2a and the flange 11b attached to the tip of the holder pipe 6 are provided. Are detachably connected by a flange joint 11 connected by bolts 11c, and the side nozzle 2a is connected to the internal pipe 2b and the external pipe 2c by a flange joint 12, respectively.

In the case shown in FIG. 3A, when the side nozzle 2a is to be removed, the side nozzle 2a and the holder pipe 6 are removed by the flange joint 11, and the side nozzle 2a, the internal pipe 2b and the external pipe 2c are removed. And the lugs 8 are detached from the brackets 9 by the flange joints 12, respectively. As a result, the side nozzle 2a can be pulled out of the side plate 1 and easily removed as shown in FIG. When the side nozzle 2a is mounted, the procedure is the reverse of the above, but at this time, all the mounting is performed by bolts, and no welding is required.

In the above embodiment, the side nozzle 2a of a liquid storage tank such as an oil storage tank is shown. However, for example, the nozzle part of a drain pipe of a floating roof type tank can be similarly implemented. Also, the same can be applied to a roof nozzle other than the side nozzle,
Further, in each of the above embodiments, the structure in which the side nozzle 2a is fixed to the inner surface of the side plate 1 via the lug 8 or the bracket 9 has been described, but there is no problem in strength even without the lug 8 or the bracket 9. In such a case, it is of course optional to omit these, and various changes can of course be made without departing from the scope of the present invention.

[0020]

As described above, according to the tank nozzle device of the present invention, the following excellent effects are exhibited. (1) An opening having a required diameter larger than the outer diameter of the nozzle is provided in the tank outer plate at a position where the nozzle penetrates, and the base end of the holder tube protruding outside the tank outer plate by a required length at the opening. A part is fixedly provided, a flange is provided on an outer wall portion of the nozzle which is inserted into the holder pipe and is integrally connected to the internal pipe and the external pipe, a tip of the holder pipe is fixed to the flange, and A lug having a length that can pass through the inside of the opening is protruded from the outer wall of the nozzle located inside, and the tip of the lug can be detachably attached to a bracket fixed to the inner surface of the tank outer plate. Since the nozzle is attached, the nozzle can be easily removed, thereby enabling a base treatment at a factory, enabling a detailed inspection, and making it easy to judge reuse or replacement. Become, and at the time of installation Does not require direct welding to the opening of the side plate, so that heat treatment after welding is unnecessary, and a large-scale preparation for the heat treatment can be eliminated. (2) Instead of detachably attaching the lug to the bracket fixed to the inner surface of the tank outer plate, extend the tip of the lug to the inner surface of the tank outer plate and fix it directly to the tank outer plate. Even with such a configuration, the same operation and effect as those in the case (1) can be obtained. (3) The flange provided on the outer wall of the nozzle and the distal end of the holder tube are fixed by a flange joint that connects the flange provided on the outer wall of the nozzle to the flange provided on the distal end of the holder tube. By employing a configuration in which the connection is made, and the nozzle, the internal pipe, and the external pipe are connected by a flange joint, any welding work can be omitted when the nozzle is attached or detached.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a nozzle device for a tank according to the present invention, in which (a) is a schematic diagram showing a state before the nozzle is removed, and (b) is a schematic diagram showing a state after the nozzle is removed. FIG.

FIG. 2 shows another embodiment of the present invention.
Is a schematic diagram showing a state before the nozzle is removed, and (b) is a schematic diagram showing a state after the nozzle is removed.

FIG. 3 shows still another embodiment of the present invention.
(A) is a schematic diagram showing a state before removing the nozzle,
(B) is a schematic diagram showing a state after a nozzle is removed.

FIG. 4 is a schematic view showing an example of an oil storage tank provided with a side nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side plate (outer plate) 2a Side nozzle (nozzle) 2b Internal piping 2c External piping 5 Opening 6 Holder tube 7 Flange 8 Lug 9 Bracket 11,12 Flange joint 11a, 11b Flange part

Claims (3)

[Claims] 1. An opening having a required diameter larger than the outer diameter of the nozzle is provided at a position where the tank outer plate penetrates the nozzle.
A flange is provided on an outer wall portion of a nozzle which is fixedly provided at a base end portion of a holder tube protruding a required length to the outside of the tank outer plate, is inserted through the holder tube, and communicates integrally with an internal pipe and an external pipe. Fixing the tip of the holder tube to the flange,
A lug having a length capable of passing through the inside of the opening is projected from an outer wall portion of the nozzle located inside the tank outer plate, and a tip end of the lug is fixed to an inner surface of the tank outer plate. A nozzle device for a tank characterized by having a configuration detachably attached to a bracket that has been set. 2. Instead of detachably attaching the lug to a bracket fixed to the inner surface of the tank outer plate, the tip of the lug extends to the inner surface of the tank outer plate and is directly fixed to the tank outer plate. The nozzle device for a tank according to claim 1, wherein 3. A flange provided on the outer wall of the nozzle and a tip of the holder tube are fixed to each other by connecting the flange provided on the outer wall of the nozzle to the flange provided on the tip of the holder tube. 2. The tank nozzle device according to claim 1, wherein the connection is made by a joint, and the nozzle, the internal pipe, and the external pipe are connected by a flange joint.