JPS5843318B2 - Tank sinking amount display monitoring device - Google Patents

Description

[Detailed Description of the Invention] Conventionally, tanks such as oil storage tanks and silos are often installed on reclaimed land with embankments, but storage tanks are installed on these reclaimed lands after the growth period has been stabilized. It is known that when storage materials are stored in a storage tank, the tank undergoes equal settlement and unequal settlement, and there is a need for the development of a measuring device and a monitoring device for the amount of settlement.

In particular, uneven settling of the storage tank causes a huge unequal strain on the storage tank structure, and a situation may arise in which the risk of destruction of the storage tank must be anticipated.

In the present invention, several water filling needles are installed on the overhanging edge of the bottom plate of a tank, the lower part of each water filling needle is connected with a pipe, a float is floated on the liquid level of the water filling needle, and a lifting rod attached to the float is moved. A device that displays or monitors the amount of subsidence in a tank, especially the maximum point of uneven subsidence, by guiding the tip outside the water filling needle and converting the movement of the tip of the lifting rod into an electrical display. , has novel features that meet the above-mentioned needs.

To explain the embodiment of the present invention with reference to the drawings, several filling needles 4 (8 pieces are shown in FIG. 2) are installed on the overhanging edge 3 of the bottom plate 2 of the tank 1, and each filling needle 4 is The lower part is connected by a pipe 5 to maintain the same height of the liquid level in each water mound 1. A float 6 is floated on the liquid surface in the water mound needle 4, and a lifting rod 7 attached to the float 6 is connected to the water mound needle 4. An iron core 9 is provided at the upper end by penetrating the lid 8.

A transmitter-side coil 10 surrounding an iron core 9 is fixed to a support 11 standing upright on a lid 8.

The coil 10 has wires 13 and 14 connected at both ends to a relatively low voltage power source E1 and reaching the receiver 12, and further has an intermediate wire 1 connected to the receiver 12 in the middle of the coil 10.
5 to form an AC bridge circuit.

A coil 1T is fixed to a column 16 which is fixedly installed in a control room or the like where the receiver 12 is located away from the tank 1, and the wires 13, 14 and 15 are respectively connected in the same way as the coil 10, and the iron core 1 is inserted into the coil 11.
8 is arranged to be movable up and down, and the connecting rod 19 of the iron core is connected to the meter 20.

The instrument 20 is housed, for example, in a balance rod 22 supported by a fulcrum 21, and the negative end of the balance rod 22 connects the connecting rod 19 of the iron core.
A weight 23 and a recording pen 24 are provided at the other end.

Further, a terminal 25 is provided on the upper part of the iron core 9, and it is made to face the terminal 21 attached from the support 11 via a spring 26, and when the iron core 9 rises and the terminal 25 rises and comes into contact with the terminal 2T,
The circuit between the power source E2 and the warning lamp 28 on the tank 1 is closed and the lamp 28 is turned on.

29 is a level meter. Furthermore, water level meter 4 selected for each tank
Both reference feet 30 reaching the bedrock of the ground dug outside are made to stand upright, and arrows 31 are provided on the water meter 4 toward the reference feet 30.

To explain the operation of the device of the present invention, if it is assumed that the tank 1 sinks only uniformly, the liquid level of each water gauge 4 will not rise or fall, but only the arrow 31 will move relative to the reference legs 30. The amount of equal subsidence can be measured by

When there is a risk that the reference feet 30 may sink, it is desirable to perform leveling rarely and make corrections, so as not to directly cause damage to the tank.

On the other hand, when uneven settlement occurs in the tank, for example, the first
If the water level gauge 4 in the figure is at the position of the most uneven settlement, part of the liquid in the other water level needles in the tank will collect at this water level gauge via the pipe 5, and the liquid level will be indicated by the dotted line. and rises to L.

Thereupon, the float 6 rises and pushes up the iron core 9. The rise of the iron core 9 causes a change in inductance in the AC bridge circuit, causing an unbalanced current to flow, causing the iron core 18 to rise and the meter 20 to measure the amount of unequal subsidence.

The lamp 28 is a warning lamp that lights up when the iron core 9 rises to a certain limit, and can be provided at the top of the tank or in a remote control room.

The device of the present invention, whether installing a warning lamp or using an AC bridge circuit, connects a plurality of water level gauges attached to a tank with each other through a pipe, and measures water level at the most critical point of uneven settlement. This device measures the rise in the liquid level of the meter, and because it can electrically transmit the rise and fall of the float on the liquid level, it is possible to measure or monitor uneven settling of the tank, and it can be used reliably even if the bottom plate of the tank settles unevenly. It continues to measure and there is no risk of the liquid in the tank catching fire.

Therefore, the device for measuring the movement of the lifting rod protruding from the water gauge can be modified in various ways.

In the device of the present invention, since the water level meter is installed on the protruding edge of the bottom plate of the tank, it is possible to magnify and detect the amount of sinking of the tank, and in addition, it is possible to avoid insulation failure of electrical wiring. This has the effect of facilitating or speeding up maintenance or parts replacement.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view of the apparatus of the present invention, and FIG. 2 is a plan view of FIG. 1. 1...Tank, 3...Protruding edge of bottom plate,
4... Water meter, 5... Pipe, 6...
...Float, γ... Lifting rod, 9...
Iron core, 10... Transmitter side coil, 12...
...Receiver, 20...Meter, 28...
lamp.

Claims (1)

[Scope of Claims] 1. A plurality of water filling needles arranged at intervals on the protruding edge of the bottom plate of the tank and whose lower parts communicate with each other via pipes, and a plurality of water filling needles that are suspended on the liquid surface of the water filling needles. a lifting rod having one end fixed to the float and the other end extending and protruding outside the water embankment 1; an iron core disposed near the other end of the lifting rod; and a coil placed around the iron core; A display and monitoring device for the amount of sinking of a tank, comprising a receiver connected to the coil and detecting the amount of sinking of the tank. 2. A plurality of water filling needles arranged at intervals on the overhanging edge of the bottom plate of the tank and whose lower portions are connected to each other via pipes, and one end of which is fixed to a float floating on the liquid surface of the water filling needles. a lifting rod whose other end is extended and protruded outside the water embankment 1; an iron core disposed near the other end of the lifting rod; a coil arranged around the iron core; A display and monitoring device for the amount of sinking of a tank, comprising a receiver for detecting the amount of sinking of the tank, and an alarm lamp that is lit as the lifting rod moves up and down.