JP4103944B2 - Oil storage tank floating roof seal surface pressure measuring instrument - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floating roof seal surface pressure measuring device for an oil storage tank, and more specifically, a flexibility interposed between a tank seal member provided at a peripheral portion of a floating roof (pontoon) and an inner wall surface of a tank body. This relates to the improvement of the bag.
[0002]
[Prior art]
Conventionally, as a structure of a large floating roof type oil storage tank for storing or stocking crude oil or the like, for example, as shown in FIGS. 3 and 4, a tank body of an underground oil storage tank or an above-ground oil storage tank buried in the ground 1, a lid-like floating roof 2 (pontoon) suspended so as to cover the surface of the storage liquid W (crude oil, etc.) in the tank body 1, and the inner wall surface of the tank body 1 on the peripheral edge of the floating roof 2 The tank seal member 3 is slidable and seals the gap with the la.
[0003]
The tank seal member 3 mounted on the peripheral edge of the floating roof 2 is configured by filling urethane foam 4b in a rubber bag 4a formed in an annular shape as shown in FIG. And is configured to slide on the inner wall surface 1a of the tank body 1 following the vertical movement of the surface of the storage liquid W.
[0004]
[Problems to be solved by the invention]
By the way, when installing the floating roof 2 on the surface of the storage liquid W accommodated in the tank body 1, how much the tank seal member 3 attached to the peripheral portion of the floating roof 2 is with the inner wall surface 1 a of the tank body 1. The problem is whether they are in contact with the sealing pressure.
[0005]
Conventionally, as this seal surface pressure measuring device, flexible pressure-resistant rubber bags 5 filled with a fluid such as water as shown in FIG. 6 are disposed at several locations (four locations at intervals of 90 degrees) of the tank seal member 3 for flexibility. The pressure gauge 6 provided in the pressure-resistant rubber bag 5 captures the volume change of the flexible pressure-resistant rubber bag 5 accompanying the load as a differential pressure, and a simple rubber bag measuring instrument that calculates the load has been the mainstream.
[0006]
However, since the flexible pressure-resistant rubber bag 5 is flexible and does not have a specific shape, when it is subjected to an initial set pressure before being attached to the tank seal member 3, it has a nearly spherical shape and is difficult to handle. There was a problem that it would be a measuring instrument with a thick wall thickness.
[0007]
That is, as shown in FIG. 3 and FIG. 4, when the pressure-resistant rubber bags are attached to several places of the tank seal member 3 mounted on the peripheral edge of the floating roof 2, for example, four places at intervals of 90 degrees in the circumferential direction. When fluid is injected into the pressure-resistant rubber bag 5 so as to have a set pressure, the flexible pressure-resistant rubber bag 5 becomes a spherical shape and can be easily set between the tank seal member 3 and the inner wall surface 1a of the tank body 1. there is a problem that does not come.
[0008]
In addition, in order to easily detect the pressure due to the load, it is necessary to make the material of the flexible pressure-resistant rubber bag 5 as flexible as possible. The more rubber the bag is, the more it will try to be round. In particular, the flexible pressure-resistant rubber bag 5 used as a seal surface pressure measuring device is used for measuring the reaction force of an elastic body inserted into a gap or the like, so that a space for inserting the measuring device of the flexible pressure-resistant rubber bag 5 is made. It was not easy.
[0009]
Also, if the thickness of the inserted measuring instrument is thick, the measurement position will be measured at a position where the repulsive force is higher than the actual compression position, resulting in a large error, and therefore the flexible pressure resistance used as a seal surface pressure measuring instrument. It is desirable that the thickness of the rubber bag 5 is thin.
[0010]
An object of the present invention is to attach a flexible bag provided with a pressure gauge between a tank seal member and an inner wall surface of a tank main body so as to have a flat oval shape when pressure is injected. workability readily it is able to carry out, also can reduce the weight by thin to provide a further floating roof sealing surface pressure meter of oil storage tanks measurement accuracy can be improved.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a floating roof seal surface pressure measuring device for an oil storage tank according to the present invention covers a tank body having a cylindrical wall extending vertically and storing oil, and covers the oil surface in the tank body. And an oil storage tank comprising a lid-like floating roof to be floated and an expandable / contractable tank seal member that is disposed on a peripheral portion of the floating roof and is in sliding contact with an inner wall surface of the tank body. An oil storage tank floating roof seal surface pressure measuring instrument installed between an inner wall surface of a tank body and measuring a pressure acting between the tank seal member and the inner wall surface of the tank body, It has a flexible bag body with a spheroidizing prevention member and a pressure gauge on the outside. The flexible bag body is made of a rubber-like elastic body in which a fiber reinforcing material is embedded, and has a fluid. The spheronization prevention part when injected Longitudinal sectional shape by constraining of it is an gist to be formed into a flat oval shape that the minor axis in the horizontal direction.
[0012]
The present invention is configured as described above, and is formed of any one of a rigid metal plate, a resin plate, a honeycomb structure, a rod-like body, and a combination thereof in a flexible bag body having a pressure gauge. It is possible to have a flat oval shape during pressurization by incorporating an anti-oxidation member, and therefore the amount of fluid injected relative to the initial pressurization is small, and in the case of liquid it is extremely lightweight Can be achieved. In addition, it is only necessary to create a slight gap when mounting, and the insertion workability is also good. Since the measurement position is closer to the position where pressure is actually applied, measurement can be performed at a position close to the actual position.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0014]
Note that the same components as those in the conventional example are denoted by the same reference numerals and description thereof is omitted.
[0015]
FIG. 1 is a side view of a flexible bag body 8 according to the present invention before pressing, and FIG. 2 is a central longitudinal sectional view when the flexible bag body 8 is pressed.
[0016]
A flexible bag body 8 according to the present invention includes a tank seal member 3 and a tank body 1 that are mounted on a peripheral edge of a floating roof 2 disposed inside a tank body 1 having a cylindrical wall portion extending vertically . several places between the inner wall surface 1a (in this embodiment, but are provided at four places at 90-degree intervals in the circumferential direction, the number may be provided at least four or more places) Ri Ah provided, Ru used more .
[0017]
The tank seal member 3 is configured by filling a urethane bag 4b in a rubber bag 4a formed in an annular shape, and the flexible bag 8 is disposed so as to be embedded in the tank seal member 3. To do.
[0018]
The flexible bag 8 is formed in a bag shape with a CR rubber-like elastic body in which a fiber reinforcing material 9 is embedded, and a spheroidizing prevention member 7 is provided inside, and a pressure for measuring the internal pressure. A total of six are provided. An inlet 10 for injecting fluid (liquid or gas) or the like is provided in a part of the flexible bag body 8, and the pressure gauge 6 is connected to the upper portion of the flexible bag body 8 through a pipe 11. Is attached to the outside .
[0019]
Further, the spheroidizing prevention member 7 provided inside the flexible bag body 8 includes a rigid metal plate, a resin plate, a honeycomb structure, a rod-like body and the like corresponding to the shape of the flexible bag body 8. A combination of any of the above is used.
[0020]
Therefore, when the pressure fluid is injected into the flexible bag 8, the shape is restricted by the spheroidizing prevention member 7, so that the vertical cross-sectional shape is a flat oval with the horizontal axis as the short axis as shown in FIG. It can be in the form.
[0021]
In the present invention, when the floating roof 2 is installed on the surface of the storage liquid W accommodated in the tank main body 1, the tank seal member 3 attached to the peripheral portion of the floating roof 2 is the tank main body. When measuring how much sealing pressure is in contact with the inner wall surface 1a of 1, a fluid having an initial set pressure is injected into the flexible bag 8 in advance and the vertical cross-sectional shape is horizontal as shown in FIG. when installing the those in flat elliptical form of the direction and short axis at a predetermined position of the tank sealing member 3, in a state where the recessed tank seal member 3, the flexible like a flat elliptical shape in the gap to be inserted, respectively Re their sexual bag 8.
[0022]
And the pressure pressure which acts on the inner wall surface 1a of the tank main body 1 of the tank seal member 3 is correctly measured by measuring whether the pressure gauge 6 is higher or lower than the set pressure at several positions of the tank seal member 3. It can be measured.
[0023]
As described above, the spherical prevention member 7 is provided inside the flexible bag body 8 having the pressure gauge 6 so that a flat oval shape can be obtained during pressurization. The amount of fluid injected into the liquid may be small, and in the case of a liquid, the weight can be extremely reduced. In addition, it is only necessary to create a small gap when mounting, the mounting workability is good, and since the measurement position is closer to the position where pressure is actually applied, measurement can be performed at a position close to the actual position.
[0024]
【The invention's effect】
The present invention provides a tank main body for storing oil as described above, a lid-like floating roof that covers and floats the oil surface in the tank main body, and is disposed on the peripheral edge of the floating roof. An oil storage tank comprising an expandable and contractible tank seal member that is in sliding contact with the inner wall surface, and a spheroidizing prevention member is internally provided at several locations between the tank seal member and the inner wall surface of the tank body, and pressure Since the flexible bag body equipped with the gauge is arranged, the flexible bag body equipped with the pressure gauge can be made into a flat oval shape at the time of pressure injection, thereby improving the mounting workability In addition, the thickness can be reduced by reducing the wall thickness, and the measurement position is closer to the position where the pressure is actually applied, so that the measurement accuracy can be improved.
[Brief description of the drawings]
FIG. 1 is a side view of a flexible bag body according to the present invention before pressurization.
FIG. 2 is a central vertical cross-sectional view when a flexible bag body is pressurized and expanded.
FIG. 3 is a central longitudinal sectional view of a conventional oil storage tank.
4 is a plan view taken along arrow AA in FIG. 3; FIG.
5 is an enlarged cross-sectional view of a portion X in FIG.
FIG. 6 is a side view when a conventional flexible bag body is inflated under pressure.
[Explanation of symbols]
1 Tank body containing oil 2 Floating roof (pontoon)
3 Tank seal member 4a Rubber bag 4b Urethane foam 5 Flexible pressure resistant rubber bag 6 Pressure gauge 7 Sphericalization preventing member 8 Flexible bag body 9 Fiber reinforcement 10 Inlet 11 Pipe W Storage liquid (crude oil, etc.)

Claims (2)

A tank main body having a vertically extending wall portion for storing oil, a lid-like floating roof that covers and floats the oil surface in the tank main body, and is disposed on a peripheral edge of the floating roof. An oil storage tank comprising an expandable and contractible tank seal member that is in sliding contact with the inner wall surface of the main body, the oil storage tank being installed between the tank seal member and the inner wall surface of the tank main body, the tank seal member and the inner wall surface of the tank main body An oil storage tank floating roof seal surface pressure measuring device that measures the pressure acting between
A flexible bag body having a spheroidizing prevention member inside and a pressure gauge on the outside, the flexible bag body is made of a rubber-like elastic body in which a fiber reinforcing material is embedded; and An oil storage tank floating roof seal surface pressure measuring device in which a vertical cross-sectional shape is formed into a flat ellipse having a horizontal axis as a short axis by restraint of the spheroidizing prevention member when a fluid is injected.   2. The oil storage tank according to claim 1, wherein the spheroidizing prevention member accommodated in the flexible bag is formed of any one of a rigid metal plate, a resin plate, a honeycomb structure, a rod-like body, and a combination thereof. Floating roof seal surface pressure measuring instrument.

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