JP3246832B2 - Mounting method and mounting device for columns in floating roof tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating roof type tank in which a part of a column is removed and a liquid ejecting apparatus is attached to fluidize and discharge sludge or the like deposited in the tank, or clean the tank inner surface. Later, even if a part of the floating roof is bent due to the weight of the liquid ejecting apparatus and the support is to be mounted, the support mounting method and the mounting apparatus applied when the through hole of the support does not match the insertion hole of the support pipe, etc. About.

[0002]

2. Description of the Related Art A method of removing sludge or the like deposited in a floating roof tank by a liquid ejecting apparatus detachably attached to a floating roof is disclosed in, for example, Japanese Patent Publication No. 3-7 / 1995.
It is conventionally known as disclosed in Japanese Patent No. 9280.

Referring to FIG. 1, the conventional example will be described below. 1 'is a tank, 2' is a floating roof which rises and falls according to the liquid level in the tank 1, and 3 'is fixed to the floating roof 2' in large numbers. A support column 4 'detachably attached to the support pipe 2a' is a liquid ejecting device detachably attached to the support pipe 2a ', and the same publication or Japanese Utility Model Publication No. 4-33275. As described above, high-pressure liquid is ejected while being rotated and swung from an ejection port at a lower end to remove a deposit a ′ such as sludge.

A pump 5 'discharges the removed sediment a' and the liquid. A pump 6 stores the liquid containing the sediment a 'discharged by the pump 5, and also stores a liquid containing the sediment a'. A recovery tank 7 'for separating the liquid from the liquid is a pump for supplying the liquid recovered from the recovery tank 6' to the liquid ejecting apparatus 4 '.

[0005] Next, the case of removing the deposit a 'staying in the tank 1' will be described. When a certain amount of the deposit a 'is deposited, the liquid in the tank 1' is first discharged. At this time, the floating roof 2 ′ descends as the liquid is discharged. When the floating roof 2 ′ descends to some extent, the lower end of the column 3 ′ attached to the floating roof 2 ′ reaches the bottom surface of the tank 1 ′ and is supported. Since the 'support pipe 2a' is fixed to a certain portion of the column 3 'by a pin, the floating roof 2' stops at a certain distance from the bottom of the tank. On the other hand, just before the lower end of the support 3 'reaches the bottom of the tank 1', the support 3 'at a desired position is connected to the support pipe 2'.
a ', and the liquid ejecting device 4 is attached instead. Next, the liquid is supplied to the liquid ejecting apparatus 4 ', and the liquid is ejected into the tank 1' while rotating and swinging the tip thereof. Thereby, the deposit a ′ is crushed, dispersed, and fluidized by the jetting force of the liquid. The crushed, dispersed and fluidized sediment a 'is discharged by the pump 5' and guided to the collection tank 6 '.

As the floating roof 2 ', a relatively thin plate material is used because it floats on the surface of the stored liquid in a normal state. However, when the stored liquid is discharged, the support 3' is used. Only the floating roof 2 'will be supported. Also, at the time of cleaning the inside of the tank 1 ', since some of the columns 3' are replaced with the liquid ejecting device 4 'as described above,
The remaining support 3 'supports the floating roof 2' and the liquid ejecting device 4 '. Further, in the portion to which the liquid ejecting device 4 'is attached, the weight of the liquid ejecting device 4' is added, so that the liquid ejecting device 4 'is deformed downward after the cleaning operation is completed. Therefore, after the cleaning operation is completed, the liquid ejecting apparatus 4 ′
Is removed and the support 3 'is attached again, the pin cannot be inserted because the through hole provided in the support 3' and the insertion hole provided in the support pipe 2a 'do not communicate with each other.
It could not fulfill the role of the support 3 '.

Therefore, conventionally, after removing the stored liquid from the tank 1 ', an operator with a lifting device such as a jack enters the tank 1', and the lower surface of the bent portion of the floating roof is moved by the lifting device. Push up, through hole of support 3 'and support pipe 2
The pin was inserted by communicating with the insertion hole of a '.

[0008]

However, in the above-mentioned conventional method, since the proper state cannot be confirmed from the worker in the tank 1 ', another worker can use the tank support 3' on the upper surface of the floating roof 2 '. It was necessary to notify that the through-hole and the insertion hole of the support 3 'communicated. In addition, it was extremely time-consuming. Further, when the liquid stored in the tank 1 'is oil, there is a problem of intake toxicity and a problem of flammability. In some cases, the tank 1 'may be filled with nitrogen gas or the like in order to eliminate the flammability. However, there is a problem in that the worker has another intake toxicity.

[0009]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, and has a floating roof provided with a large number of support pipes rising upward from an edge of a hole, and a detachable removable roof which holds the floating roof at a constant distance from the bottom. In a floating roof type tank having a plurality of struts, the detached strut is loosely inserted into a support pipe and the lower end is supported at the bottom, and the elevating mechanism of the mounting device including the elevating mechanism and the fixed part is supported by the strut. Attach the fixed part to the support pipe and attach the fixed part to the support pipe, raise the fixed part and the support pipe by operating the elevating mechanism, and connect the insertion hole provided in the support pipe and the through hole provided in the column. TECHNICAL FIELD The present invention relates to a mounting method of a support column in a floating roof type tank, wherein a pin is inserted in a state where the pin is inserted, and a mounting device.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

The mounting device according to the present invention comprises a lifting mechanism 2 detachably mounted on a support 1 and a support pipe 3.
And a fixing portion 4 which is detachably attached to the main body.

The lifting mechanism 2 according to the first embodiment shown in FIG. 2 comprises a lifting arm 21 and a pair of lifting bolts 22. The inverted U-shaped protrusion 11 fixed to the upper end can be detachably attached in a state of being fitted. On the left and right sides of the lifting arm 21, through holes 212 are provided for loosely inserting the lifting bolts 22, 22, respectively.
At the upper edge of 2,212, the lifting bolts 22,2 are provided.
Nuts 213 and 213 screwed with 2 are fixed integrally. Therefore, the lifting dimension bolt 22 is configured to be vertically movable with respect to the lifting arm 21 by rotating the lifting dimension bolt 22.

Further, the fixing portion 4 has a two-part band 41.
And a knock bolt 42 penetrating from the outer peripheral side of the knock bolt hole 411 provided in the band 41 and protruding toward the inner surface side.
By attaching the band 41 to the outer periphery of the support pipe 3 and fastening the knock bolt 42, the band can be detachably attached to the support pipe 3. In addition, connecting portions 412 and 412 are provided on the outer periphery of the band 41, and the lifting mechanism 2 is provided in a hole provided in the connecting portions 412 and 412.
Lifting loose cutting bolts 22, 22 are loosely fitted. Fixing nuts 221 and 221 are fixed near the lower ends of the lifting bolts 22 and 22, respectively.

A method for mounting the detached support column 1 on the floating roof 5 of the floating roof type tank by the mounting apparatus having the above configuration will be described below.

First, the column 1 removed by washing or the like in the tank is loosely inserted into the support pipe 3 of the floating roof 5, and the lower end is supported on the bottom. At this time, the through hole 12 of the support 1 and the insertion hole 31 of the support pipe 3 should not coincide with each other.
2 and the insertion hole 31 are arranged so as to be located vertically.

The floating roof 5 in the embodiment shown in FIG.
A support pipe 3 having a substantially hat-shaped cross section is fixed on the upper surfaces of the plurality of hole edges by welding or the like. In other words, the floating roof 5 has a configuration in which a large number of support pipes 3 rising upward from the hole edge are provided. is there. In addition, the support pipe 3 includes:
An insertion hole 31 is provided, a through hole 12 is provided in the column 1, and the pin 6 is inserted in a state where the insertion hole 31 and the through hole 12 are communicated with each other. It is a mounting state of. However, since the support pipe 3 is bent downward due to the use of the liquid ejecting apparatus as described above, in this state, the insertion hole 31 of the support pipe 3 is positioned below the through hole 12 of the column 1 and the pin 6 is inserted. I can't wear it.

Therefore, the band 41 is attached to the outer periphery of the support pipe 3, and the insertion hole 31 of the support pipe 3 and the band 4
The first knock bolt hole 411 is communicated, and the knock bolt 42 is screwed into the knock bolt hole 411 and tightened.
At this time, it should be noted that if the bolts are tightened with excessive force, they will also come into contact with the columns 1. In this state, the band 41 and the support pipe 3 behave integrally.

Next, the lifting arm 21 is connected to the projection 11 of the column 1.
And the lifting bolt 22 is attached to the lifting arm 21 and the connecting portion 412 of the band 41, respectively.

When the lifting bolt 22 is rotated in this state, the lifting bolt 22 itself rises and the band 41 and the support pipe 3 rise.
As shown in (1), the knock bolt 42, that is, the insertion hole 31 of the support pipe 3 gradually approaches the through hole 12 of the support column 1. Then, as shown in FIG. 4, the state where the insertion hole 31 of the support pipe 3 and the through hole 12 of the support column 1 communicate with each other and coincide with each other can be confirmed from the opposite direction of the direction in which the knock bolt 42 is inserted. The rotation of the lifting bolt 22 may be stopped when the state is reached.

Then, as shown in FIG. 5, the pin 6 is inserted into the insertion hole 31 of the support pipe 3 and the through hole 12 of the column 1 from the side opposite to the knock bolt 42,
2 is removed. If the pin 6 is firmly inserted,
As shown in (1), the push bolt 7 may be screwed and inserted.

As described above, by using the mounting device of the present invention, it is possible to easily and quickly mount the columns from above the floating roof, and to completely solve the problems of intake toxicity and flammability as in the prior art. Can be solved.

In the second embodiment shown in FIG. 7, a boss 32 is provided at the edge of the insertion hole 31 of the support pipe 3 for the purpose of reinforcing the insertion hole 31. (42) may not be used. That is, as shown in the drawing, the band 41 is attached so that the upper end thereof is located below the boss 32, and when the band 41 is raised in the same manner as in the first embodiment, the upper end of the band 41 supports the boss 32 from below. Therefore, the support pipe 3 can be raised in a series.

In the second embodiment, the knock bolt (4
Since the work 2) does not require the attachment / detachment work, the work is simplified, and the column 1 can be mounted more easily and in a shorter time.

Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and may be implemented in any manner unless the configuration described in the claims is changed. Can be.

[0025]

As described above, according to the present invention,
The support columns can be easily and quickly mounted from above the floating roof, and the conventional problems of intake toxicity and flammability can be completely solved.

[Brief description of the drawings]

FIG. 1 is a side sectional view schematically showing a state in which the inside of a floating roof type tank is cleaned by a liquid ejecting apparatus.

FIG. 2 is an exploded perspective view of a mounting device according to one embodiment of the present invention.

FIG. 3 is a partially cutaway front view showing a state in which a lifting mechanism is driven.

FIG. 4 is a partially cutaway front view showing a state where the lifting mechanism is stopped.

FIG. 5 is a partially cutaway side view showing a pin insertion state in a state where the lifting mechanism is stopped.

FIG. 6 is a transverse sectional view showing a main part of FIG. 5;

FIG. 7 is a partially cutaway side view showing another embodiment.

[Explanation of symbols]

 Reference Signs List 1 support 12 through hole 2 elevating mechanism 3 support pipe 31 insertion hole 4 fixing part 5 floating roof 6 pin

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65D 88/00-90/20

Claims (2)

(57) [Claims] 1. A floating roof tank comprising a floating roof provided with a large number of support pipes rising upward from a hole edge, and a plurality of detachable pillars for holding the floating roof at a constant distance from a bottom portion. With the supporting column loosely inserted into the support pipe and the lower end supported at the bottom, the lifting mechanism of the mounting device including the lifting mechanism and the fixing section is attached to the top of the column, and the fixing section is attached to the supporting pipe, and the lifting mechanism Floating roof type characterized in that the fixing part and the support pipe are raised by activating the pin, and the pin is inserted in a state where the insertion hole provided in the support pipe is communicated with the through hole provided in the support post. How to mount the pillars in the tank. 2. A floating roof tank comprising: a floating roof provided with a large number of support pipes rising upward from a hole edge; and a plurality of detachable pillars for holding the floating roof at a constant distance from the bottom. It is a mounting device that is used in a state where the supporting column is loosely inserted into the support pipe and the lower end is supported at the bottom, and includes a lifting mechanism that is detachably attached to the column and a fixed portion that is detachably attached to the supporting pipe,
By operating the elevating mechanism, the fixing portion and the support pipe are raised, and the pin is inserted in a state where the insertion hole provided in the support pipe and the through hole provided in the column are communicated. Mounting device for columns in floating roof tanks.