JPH0448399Y2 - - Google Patents

Description

[Detailed description of the invention] <Field of industrial application> The present invention is a fluid remaining amount meter that displays the remaining amount of a fluid such as high-pressure gas, liquefied gas, or low-temperature liquefied gas contained in a pressure vessel. Regarding.

<Prior Art> Conventionally, as this type of device, the device shown in FIG. 5 is known (US Pat. No. 4,580,450).

This was proposed earlier by the present applicant, in which a blind hole 110 is formed in a communicating manner in the base 104 of a pressure vessel 101 filled with liquefied gas, and a transmission rod 112 is moved up and down across the pressure vessel 101 and the blind hole 110. A float 113 is attached to the lower end of the transmission rod 112, a permanent magnet 114 is attached to the upper end of the transmission rod 112, and a remaining amount indicator 118 made of a magnetic material is provided on the side of the blind hole 110 so as to be movable up and down, and housed in the pressure vessel 101. The height at which the float 113 floats due to the buoyant force received from the liquefied gas is displayed on the remaining amount indicator 118 via the permanent magnet 114.
The transmission rod 112 is vertically separated at a mid-height portion, and the upper rod portion 112a and the lower rod portion 112b of the separated transmission rod 112 are swingably connected via a spring 123, and inserted into the blind hole 110. A stopper receiving portion 122 is provided to restrict the descent of the transmission rod 112.

Note that reference numeral 116 is a suspension spring that suspends the transmission rod 112 from the guide member 115, and 120 is a transparent scale plate for visually checking the height of the remaining amount indicator 118.

<Problems to be solved by the invention> In the conventional example described above, the transmission rod portion protruding into the pressure vessel 101 is separated vertically, and the spring 12
3, in order to alleviate the bending moment acting on the transmission rod 112 due to the gravity or buoyancy of the float 113. However, it has the following problems. There is.

That is, when the pressure vessel 101 is filled with liquefied gas or used with the pressure vessel 101 installed in an inclined state, the upper rod portion 12a of the transmission rod 112 becomes distorted, for example, at two points A and 1 in FIG. Touch with B.

The contact pressure caused by this twisting prevents the transmission rod 112 from moving up and down smoothly, which may result in an error in the remaining amount display.

In addition, in the conventional example described above, the restricting force of the stopper receiving portion 122 acts on the upper rod portion 112a of the transmission rod 112 that is separated vertically, so that the pressure vessel may fall when the pressure vessel is transported. Due to such an impact, the spring 123 may be stretched too much and plastically deformed, causing an error in the remaining amount display.

The present invention was developed in view of these circumstances, and it is designed to prevent twisting of the transmission rod as much as possible, and even if twisting occurs, the contact pressure caused by the twisting is lowered to ensure smooth movement of the transmission rod. The purpose of this is to sufficiently reduce display errors by ensuring proper vertical movement, and to eliminate distortion of the display meter due to plastic deformation of the spring 123 due to impact during transportation.

<Means for Solving the Problems> In order to achieve the above object, the fluid remaining amount meter according to the present invention is an improved version of the conventional example as shown in FIGS. 1 to 4, for example. be.

That is, the float 13 is restrained from steadying within the pressure vessel 1 by the steady rest regulating plate 21 to prevent the transmission rod 12 from twisting as much as possible. On the other hand, bag tube 1
0, the transmission rod 12 is separated into upper and lower parts, and a stopper 22 is provided on the lower rod portion 12b of the transmission rod 12, and a receiving portion 24 for receiving the lower surface of the stopper 22 is provided at the lower part of the bag cylinder 10, and the lower rod portion 12b is The upper rod portion 12a is connected via a spring 23 so as to be elastically swingable.

<Function> Since the float 13 is restrained by a steady rest within the pressure vessel 1, even if the vessel is installed in an inclined state, the transmission rod 12 will not be significantly distorted.

Moreover, the transmission rod 12 is located in the upper rod portion 1 within the bag tube 10.
2a and the lower rod portion 12b, and both are connected via the spring 23 so as to be able to swing elastically, even if the transmission rod 12 is twisted, the contact pressure due to the twisting is absorbed by the spring 23. The contact pressure resistance when the tip 17 of the upper rod portion 12a comes into sliding contact with the inner circumferential surface of the bag cylinder 10 is extremely small, and the transmission rod 12 moves up and down smoothly.
This eliminates errors in fluid remaining amount display.

In addition, since the stopper 22 is provided on the lower rod portion 12b, even if the spring 23 receives an impact from falling during transportation, the spring 23 will not be overstretched and plastically deformed, eliminating the possibility of the remaining amount being displayed incorrectly. .

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is a vertical cross-sectional view of a low-temperature liquefied carbon dioxide container equipped with a liquid level gauge according to the present invention, and FIG. 2 is an enlarged vertical cross-sectional view of the main parts thereof.

In these figures, reference numeral 1 indicates the entire low-temperature liquefied carbon dioxide gas container (pressure vessel), and this pressure vessel 1
is composed of an inner container 2 and an outer container 3 disposed around the outer periphery of the inner container 2, and a heat insulating space is formed between the inner container 2 and the outer container 3.

A liquid remaining amount gauge 6 for displaying the remaining amount of liquefied carbon dioxide gas 5 filled in the inner container 2 is attached to the upper cap portion 4 of the pressure vessel 1.

In this liquid level gauge 6, a pressure-resistant lifting guide bag tube 10 is fixed to the mouthpiece 4 of the pressure vessel 1 in an upwardly protruding manner so as to communicate with the pressure vessel 1 and the bag tube 10. Insert the transmission rod 12 into the hole 11, and
A float 13 is attached to the lower end of 2, and a magnetic body 14 is attached to the upper end 17, and a remaining amount indicator 18 made of a magnetic material is fitted onto the bag cylinder 10 so as to be able to rise and fall freely, and is received from the liquid 5 contained in the pressure vessel 1. The height at which the float 13 floats due to buoyancy is displayed on a remaining amount indicator 18 via a magnetic body 14.

Float 13 attached to the lower end of the transmission rod 12
is made of synthetic resin such as polyethylene or metal such as aluminum and is formed into an elongated cylindrical shape. Transmission rod 1
2 is suspended by a suspension spring 16 on a guide member 15 having a communication hole 11, and by converting fluctuations in the buoyancy that the float 13 receives from the liquefied carbon dioxide gas 5 into the amount of expansion and contraction of the suspension spring 16. The liquid level height, which fluctuates greatly, is displayed on the display section 7 as a small amount of change.

The display part 7 is the magnetic body 1 of the upper end part 17 of the transmission rod 12.
4, and a transparent protective cap 20 which is placed over the bag tube 10 in an airtight manner and has a remaining amount scale 19 engraved thereon. This protective cap 20
The remaining amount of liquefied carbon dioxide gas 5 can be visually confirmed through the screen.

At least one of the magnetic body 14 and the remaining amount indicator 18 may be made of a magnet.

Incidentally, experimental results show that by forming the magnetic body 14 with a magnet and forming the remaining amount indicator 18 in the shape of a thin ring made of iron with non-magnetic plating, or by using a plastic magnet, the eccentricity of the magnetic force can be eliminated and the residual amount can be reduced. Good results were obtained in the followability of the quantity indicator.

As shown in FIG. 2, the transmission rod 12 is separated into an upper rod portion 12a and a lower rod portion 12b at a midway height within the bag cylinder 10, and the lower rod portion 12b
is provided with a stopper 22 for regulating the descent of the transmission rod 12 at a required height.
A receiving portion 24 for receiving the lower surface of the bag tube 10 is provided at the lower part of the bag tube 10, and the upper rod portion 12a is connected to the lower rod portion 12b via a spring 13 so as to be elastically swingable.
By doing so, the remaining amount meter will not be out of order due to the spring 23 being stretched and not returning due to impact caused by dropping the container 1 during transportation.

Furthermore, even if the transmission rod 12 is bent, the deflection of the spring 23 is absorbed, and the contact pressure resistance when the tip 17 comes into sliding contact with the inner peripheral surface of the bag tube 10 can be kept small. .

Note that FIG. 2 shows an embodiment in which the upper rod portion 12a and the lower rod portion 12b are in contact with each other, and FIGS. 3 and 4 show another embodiment in which the upper rod portion 12a and the lower rod portion 12b are separated. . In FIG. 4, reference numeral 23b indicates a bar spring, and a torsion leaf spring or the like may be used instead of the bar spring 23b.

Note that by forming the outer peripheral surface of the tip portion 17 of the upper rod portion 12a into a spherical shape, frictional resistance can be reduced, and errors in liquid remaining amount display can be particularly reduced. Firstly, the frictional contact surface is a point contact, and the contact area is small.
Second, the spherical tip portion 17 oscillates when the float 13 vibrates slightly, and the friction at that point of contact becomes dynamic friction, and the frictional force becomes smaller than in the case of static friction.

In FIG. 1, reference numeral 21 is a regulation plate for steadying the float 13 installed in the inner container 2 of the pressure vessel 1, and is used to prevent pressure vessels 1 from being installed in an inclined state, This prevents the transmission rod 12 from being bent or distorted due to the large vibration of the float 13 when it vibrates.

The operation of the remaining fuel gauge 6 configured as described above will be explained next.

As the liquefied carbon dioxide gas 5 in the pressure vessel 1 is collected from a carbon dioxide gas extraction device (not shown) and consumed, the liquid level L of the liquefied carbon dioxide gas 5 decreases, and the magnetic body 14 moves upward and downward. It descends inside the bag tube 10.

When the magnetic body 14 descends, the annular indicator 18, which is attracted to each other by magnetic force, follows the magnetic body 14 and descends while being guided by the lifting guide bag tube 10, and the liquefied carbon dioxide gas in the container 1 is lowered. The display unit 7 displays the fact that the number has decreased.

Furthermore, when filling the pressure vessel 1 with liquefied carbon dioxide gas 5, the liquid remaining amount meter can be used to measure the amount of filling.

<Effects of the invention> As is clear from the above explanation, the float 13 is restricted from steadying within the pressure vessel, and even if the pressure vessel is installed in an inclined state, the transmission rod will not be significantly distorted. There isn't.

In addition, by separating the transmission rod vertically within the bag cylinder and connecting the upper rod part and the lower rod part so that they can swing freely with a spring, even if the transmission rod is twisted, the contact pressure due to the twisting can be absorbed by the spring. This allows the transmission rod to move up and down smoothly and correctly. As a result, the error in displaying the liquid remaining amount is small and the display accuracy is high.

Furthermore, the regulating force from the stopper acts on the lower rod part and has no effect on the spring, so
Even when a cylinder is subjected to a fall impact during transportation, the remaining amount display does not become distorted and can be displayed correctly.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention, and the first
The figure is a vertical cross-sectional view of a liquefied carbon dioxide gas container, Figure 2 is an enlarged vertical cross-sectional view of its main parts, Figures 3 and 4 are views equivalent to Figure 2 showing different embodiments, and Figure 5 is a conventional example. FIG. 2 is a partial longitudinal cross-sectional view of the pressure vessel. DESCRIPTION OF SYMBOLS 1...Pressure vessel, 10...Bag tube, 12...Transmission rod, 13...Float, 14...Magnetic material, 18...
...Remaining amount indicator, 21... Steady rest regulation plate, 22...
...stopper, 23...spring, 24...receiving part.

Claims (1)

[Claims for Utility Model Registration] 1. A pressure-resistant lifting guide bag tube 10 is fixed to the upper part of the pressure vessel 1 in an upwardly protruding and communicating manner, and a transmission rod 12 is connected between the pressure vessel 1 and the bag tube 10. The float 1 is inserted into the lower end of the transmission rod 12 so that it can be raised and lowered.
3, the float 13 is restrained from steadying in the pressure vessel 1 by a steady rest regulating plate 21, a magnetic body 14 is attached to the upper end of the transmission rod 12, and the bag cylinder 10 is fixed to the upper end of the transmission rod 12.
A remaining amount indicator 18 made of magnetic material is provided on the outside of the
At least one of the magnetic body 14 and the remaining amount indicator 18 is made of a magnet, and the height at which the float 13 floats due to the buoyant force received from the fluid contained in the pressure vessel 1 is displayed on the remaining amount indicator 18 via the magnetic material 14. The transmission rod 12 is separated vertically at a mid-height part within the bag tube 10, and the transmission rod 1 is attached to the lower rod portion 12b of the cut-off transmission rod.
A stopper 22 for regulating the lowering of the stopper 2 is provided, and a receiving part 2 for receiving the lower surface of the stopper 22 is provided.
4 is provided at the bottom of the bag tube 10, and the lower rod portion 12b
A residual quantity meter 2 for fluid contained in a pressure vessel, characterized in that an upper rod portion 12a is elastically swingably connected to the upper rod portion 12a of a transmission rod 12, and a lower rod portion 12b of a transmission rod 12. The remaining amount meter 3 for fluid contained in a pressure vessel as described in Claim 1 of the Utility Model Registration Claim is connected by contacting the upper rod portion 12a and the lower rod portion 12b of the transmission rod 12 and separating them. Registered connected utility model Remaining gauge 4 for fluid contained in a pressure vessel as described in claim 1 Utility model in which a rod spring 23b is driven into the upper rod portion 12a and the lower rod portion 12b to connect them A remaining amount meter 5 for fluid contained in a pressure vessel as set forth in registered claim 3.A utility model in which the outer peripheral surface of the tip portion 17 of the transmission rod 12 is formed into a spherical shape.Claims 1 to 4 of registered claims Remaining level meter for fluid contained in a pressure vessel described in any of paragraphs