JPS6033374Y2 - Level gauge float vibration prevention device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a float sway prevention device for preventing the float from swaying due to ripples in the liquid level in a float-type liquid level gauge.

For example, at an oil depot, after filling a tank with oil, the pipes are purged with air to remove accumulated oil inside the pipes. Air enters the tank and causes the liquid level to ripple.

When the liquid level becomes undulating in this way, the float of the level gauge shakes violently, often damaging the internal mechanism of the level gauge body.

Conventionally, as a device for preventing a float from shaking due to ripples, as shown in Japanese Utility Model Publication No. 40-21673, a floating body that floats on the liquid surface and is guided up and down by wires is used. It is known to have a cylindrical barrier surrounding the periphery, and is used in dams and the like.

However, this shaking prevention device cannot sufficiently prevent the float from shaking, and there is a problem in that it cannot be used in liquid level gauges that require precision, such as in tanks.

This idea consists of installing a ring plate and a baffle plate on a cylindrical body that floats on the liquid surface and surrounding the float, and a guide wire for vertical guidance is stretched through each guide hole of the cylindrical body, the baffle plate, and the float. The object of the present invention is to provide a float anti-sway device which can prevent the float from shaking when the waves are rising, can be manufactured at low cost, and is easy to install.

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

In Fig. 1, reference numeral 1 is the liquid level gauge itself, which is attached to the outer wall of a tank 2 that stores oil, etc., and is wrapped around a float 3 inside the tank 2 and pulleys A and B installed on the roof of the tank 2. They are connected by a measuring tape 4, and when the float 3 moves up and down, this measuring tape 4 operates a gear mechanism inside the level gauge body 1 to move the pointer and display the water level.

Guide holes 5.5 are provided at opposite edges of the float 3, and a float guide wire 6.6 is inserted through the guide holes 5, 5 and is stretched vertically between the ceiling and the bottom of the tank 2. There is.

Further, a cylindrical body 7 is provided so as to surround the float 3.

This cylinder 7 has a buoyancy member 7b with an airtight space 7a around it, and is made to float on the liquid surface with its longitudinal direction up and down.A ring surrounds the vicinity of the liquid surface of the cylinder 7. Board 8
A circular baffle plate 9 having a substantially horizontal surface is attached below the cylindrical body 7.

Note that this baffle plate 9 has a plurality of legs 14 on the cylindrical body 7.
It is attached at a predetermined distance from the lower end of the cylinder body 7 via..., so as not to block the bottom of the cylinder body 7.

The ring plate 8 is attached at a predetermined distance from the buoyancy member 7b via a plurality of support pieces 7C provided in the radial direction on the outer circumference of the buoyancy member 7b. It is installed so that it is submerged perpendicularly to the liquid surface.

Guide holes 10, 10° 11, 11 are provided in the upper protruding piece 7d of the cylinder body 7 and the baffle plate 9, respectively.
A cylindrical guide wire 12.12 inserted through the guide holes 10, 10, 11, and 11 is stretched vertically between the ceiling and the bottom of the tank 2, and guides the cylindrical body 7 so that it moves only up and down. .

Note that the baffle plate 9 is also provided with guide holes 13, 13 through which the float guide wire 6 is inserted.

Since this device is constructed as described above, when waves occur on the liquid surface, the float guide wire 6 prevents the float 3 from shaking to some extent, and the cylindrical body 7 prevents the waves. Almost no waves are transmitted, and the sway of float 3 is extremely small.

In this case, the cylindrical body 7 tends to sway as it is directly affected by the waves, but the cylindrical guide wire 12 inserted through the guide hole 10 of the upper protrusion 7d and the guide hole 11 of the baffle plate 9
Since the cylinder body 7 is restrained at two points, upper and lower, its horizontal swing is suppressed, and since the ring plate 8 is provided slightly below the liquid level around the cylinder body 7, the cylinder body 7 The ring plate 8 further slows down the lateral movement of the cylinder body 7, thereby preventing the cylinder body 7 itself from shaking in the horizontal direction due to waves, thereby preventing the float 3 from shaking due to the vibration of the cylinder body 7.

Further, since the vertical movement of the cylinder 7 due to waves is slowed down by the baffle plate 9, the vertical movement of the cylinder 7 causes the float 3 to move slowly.
is prevented from swinging up and down.

This anti-shaking device is effective against waves coming from any direction.

Furthermore, the baffle plate 9 prevents some of the air from entering the cylindrical body 7 when the inside of the pipe is purged with air to discharge accumulated oil inside the pipe at an oil depot and air flows into the tank. prevent.

Float guide wire 6.6 and cylindrical guide wire 12.
12 may be arranged so that the arrangement as seen from the plane is on a cross line with each other as shown in Fig. 4, or it may be arranged so that they are arranged in a straight line as shown in Fig. 5. , the relationship is not particularly limited.

FIG. 6 shows a second embodiment, in which a dual-purpose guide wire 15.15 is provided that serves both as a float guide wire and a cylindrical guide wire.

In this case, only two guide wires are required, so installation is simple and inexpensive.

As explained above, in this invention, the float is guided by a guide wire stretched over a container such as a tank containing petroleum or other liquids, so that the float is prevented from shaking to a certain extent; Since the float is surrounded by a cylindrical body, waves coming from any direction will not be transmitted into the cylindrical body, and the float will hardly sway.

Furthermore, since a ring plate is attached to the periphery of this cylinder, the lateral rocking of the cylinder due to waves is further suppressed in cooperation with the guide wire, and therefore the lateral movement of the cylinder is suppressed. Shaking of the float due to shaking is also prevented.

Further, since the baffle plate is provided at the lower part of the cylinder, vertical movement of the cylinder is suppressed, and therefore vertical movement or shaking of the float due to the vertical movement of the cylinder is prevented.

As described above, this shaking prevention device has the effect of preventing the float from shaking from various aspects.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, in which Fig. 1 is a longitudinal cross-sectional view of a tank equipped with a float anti-sway device, Fig. 2 is a longitudinal cross-sectional view of the float anti-sway device, and Fig. 3 is a perspective view of the same.
4 and 5 are sectional views taken along the line IV-TV in FIG. 2, and FIG. 6 is a vertical sectional view of a float vibration prevention device showing another embodiment. 1...Liquid level gauge body, 3...Float,
4... Measuring tape, 5, 10.11...
・Guide hole, 6...Float guide wire, 7
...Cylinder, 8...Ring plate, 9...
... Baffle plate, 12 ... Cylindrical guide wire, 13 ... Guide hole, 15 ... Dual-purpose guide wire.

Claims (1)

[Scope of utility model registration request] A cylindrical body which is made to float on the liquid surface with its longitudinal direction up and down, a ring plate surrounding the cylindrical body and located below the liquid level, and a baffle plate forming a substantially horizontal surface below the cylindrical body. , and guide it in the vertical direction through the guide hole provided in the upper part of the cylinder, the guide hole provided in the baffle plate, and the guide hole provided in the float connected to the liquid level gauge inside the cylinder. A float sway prevention device for a liquid level gauge, characterized by a vertically stretched guide wire.