JPH04219598A - Residual quantity display for high pressure gas container - Google Patents

Abstract

PURPOSE:To analogically display a residual amount of high pressure gas filled in a gas container. CONSTITUTION:Gas is introduced into a pressure chamber 1 of a main body without decreasing a pressure of the gas staying inside a gas container. A pressure of the pressure chamber 1 is made to act on an operating member 4 having a pressure sensing portion 3. A pressure sensing spring 5 for pushing the operating member 4 against the pressure is provided. When a forward pressure is decreased and pushing force of the pressure sensing spring 5 exceeds the pressure, the operating member 4 is displaced. A residual amount is displayed by a command means disposed in the operating member 4 and a display 7 installed on the main body side.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a remaining amount display device for a high-pressure gas container, which displays the remaining amount of high-pressure gas containing liquefied gas filled in the gas container by detecting a decrease in the pressure. .

0002

[Prior Art] In the past, pressure gauges have been widely used to display the content of gas such as high-pressure gas or liquefied gas filled in a container. It is not easy to display low pressures that require quantitative judgment. Furthermore, recently commercialized electronic devices that use pressure sensor elements to digitally display pressure values still have a narrow functional pressure range and are expensive. Currently, devices suitable for displaying the remaining amount of high-pressure gas are not easily available.

0003

Problem to be Solved by the Invention The present invention has been made in view of the above points, and its object is to detect the remaining amount of high-pressure gas in a container until it is exhausted from the pressure region that requires detection. The purpose is to make it possible to detect and display the remaining amount.

0004

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides an apparatus for displaying the remaining amount of high-pressure gas filled in a gas container by detecting the pressure, in which the gas pressure in the gas container is reduced. a device main body 2 communicating with a pressure chamber 1 to which the pressure inside the pressure chamber is guided; a pressure sensitive spring 5 that moves the actuating member 4 in the axial direction when the gas pressure in the room decreases to a set value;
Indicating means 6 and indicating means 6 indicating the movement position of the actuating member 4
This technical means is constructed by a display means 7 that displays the remaining amount at the position.

In the remaining amount display device according to the present invention, an actuating member 4 having a pressure sensing portion 3 is disposed in a pressure chamber 1 into which the pressure of high pressure gas filled in a gas container B is guided without being reduced. There is. When the gas pressure inside the container is high, the actuating member 4 is pushed by the pressure and cannot move, but since the actuating member 4 is under the action of the pressure sensitive spring 5, the gas pressure is set in advance. When the pressure drops to a certain range, the pressure sensitive spring 5 senses this and moves the actuating member 4 in the axial direction. The operating member 4 is provided with an indicating means 6, and the main body is provided with a display means 7 that displays the remaining amount at the moved position, so that the reduced pressure is detected and the remaining amount in the gas container is detected. The amount will be displayed. Note that setting and changing the detection start pressure is easy, and the configuration is simple. Furthermore, since no special parts are required, it contributes to miniaturization and cost reduction of the device.

[0006]

Embodiments will be explained below with reference to the drawings.

As shown in FIG. 5, the remaining amount display device 10 according to the present invention is installed, for example, on the side to which the source pressure is applied of the regulator 55, which is connected to the gas valve 11 at the top of the gas container B for liquefied carbon gas. It will be done. The device main body 2 is cylindrical and has a connection port 12 with a gas valve 11 at one end, from which a pressure guide path 13 that guides the pressure inside the gas container without reducing the pressure inside the main body reaches the pressure chamber 1.

The pressure chamber 1 communicates with a sliding chamber 8 in which an operating member 4 disposed at the other end of the main body 2 is movably housed. Therefore, the sliding chamber 8, the pressure chamber 1, and the pressure guiding path 13 are aligned in a straight line on the main body axis.

The actuating member 4 has a pressure sensing portion 3 at its tip that receives the pressure of the pressure chamber 1, and has a sealing means 9 such as an O-ring on the circumference that slides airtightly onto the wall surface of the sliding chamber 8. The actuating shaft 21 is movably inserted into a hollow display tube 14 which is in contact with the rear end of the actuating shaft 21 and is coaxially with the sliding chamber 8 and provided in the main body with a large diameter. A cylindrical indicator 2 serving as a spring holder for a pressure-sensitive spring 5 that pushes the shaft 21 against the pressure of the pressure chamber 1
It consists of 2. All the constituent members of the actuating member 4 are formed to be lightweight.

The indicator 22 also serves as a pointer for the display device 10, and therefore has indicator means 6 such as conspicuously colored parts 23 and 24, such as orange and red, on the outer periphery of the cylinder. The means 6 may be a simple indicator line, and analog display is performed, but the ease of understanding is improved by color coding.

Display means 7 provided together with instruction means 6
The display tube 24 is provided with a display window 25 whose side surface is partially cut away in the axial direction to expose the internal indicator 22, and a scale 26 displayed in the axial direction along the window frame. It will be done. If the display tube 14 is made of a transparent material, the cut-out window becomes unnecessary. 27 is a transparent protection tube fitted around the outer periphery of the display tube 14, and 28 is a vent.

The other end of the display tube 14 is closed by a cap 15, and these two members 14 and 15 are connected by a threaded portion 16, and the cap 15 serves as a rear spring holder for the pressure sensitive spring 5. . Therefore, the operating range of the pressure sensitive spring 5 can be changed by inserting and removing the cap 15.

[0013] With the above configuration, the decrease and remaining amount of high-pressure gas filled in the gas container B are displayed according to the movement and position of the indicating means 6, and the device 10 of the embodiment is integrated therewith. It is equipped with a notification device 30 that notifies the user of a decrease in the remaining amount using light and sound. For this reason, the device main body 2 is integrally provided with a notification tube 32 having a hollow interior communicating with the pressure chamber 1 through a pressure chamber 31 orthogonal to the pressure chamber 1, and has an approximately cross shape as a whole. The hollow interior is provided on both sides of the pressure chamber 31, and the second actuating member 33 is slidably inserted into one of the actuating chambers 3.
4, and a housing chamber 41 for a notification circuit 40 is provided on the other side.

Since the second actuating member 33 has a pressure sensitive part 35 facing the pressure chamber 31, the high pressure introduced into the pressure chamber 31 is transferred to a pressure sensitive part provided in a space outside the actuating chamber 34. spring 36
It acts on Reference numeral 37 denotes an adjusting member for the pressure sensitive spring 36, which also serves as a spring holder and is attached by screw means 38. 39 indicates a shaft seal.

The notification device 30 has a contact 43 that can be engaged by a tip 42 in the moving direction of the second actuating member 33, and when pushed by the tip 42, the circuit 40 is closed and activated. 4
4 is a spring that pushes the battery 45, 46 is a battery holder, 47, 4
8 is an electrode in contact with the other electrode of the battery and the other electrode of the circuit, 49 is a substrate of the notification means 51 and 52, and one of the notification means 51 emits light (
(such as a light emitting diode), and the other notification means 52 is a sound emitting device (such as a light emitting diode).
These notification means 51 and 52 are protected by a cover 50. The cover 50 is a transparent member provided with a through hole 53, and is attached to the notification tube 32 with a screw portion 54. In FIG. 5, 55 is a gas pressure regulator, 56 is a gas pipe, and 57 is a valve opening/closing handle.

In the above embodiment, when the internal pressure decreases due to use and the pressure in the pressure chambers 1 and 31 falls to the set range, the pressing force of the pressure sensitive springs 5 and 36 increases to the gas pressure applied to the pressure sensitive parts 3 and 35. In order to overcome this, the actuating members 4 and 33 move toward the other end, and the indicating means 6 starts moving and displays the remaining amount in an analog manner based on its position. 43 closes, the notification circuit 40 closes, and the notification means 51 and 52 light up and generate sound (Fig. 2
).

[0017] In the operation of the device according to the present invention constructed as described above, for example, the remaining amount of liquefied carbon dioxide is displayed at 20 to 25.
When the remaining amount in the set range of kg/cm2 was 5 to 10%, the pressure inside the container 1 was 71 kg/cm2 when 100% filling with liquefied carbon dioxide gas was carried out at 25°C. After adjusting the set pressure for displaying the remaining amount to 25 kg/cm2 and using it for pushing out beer from the gas outlet, I looked at the display means 7 because the light and sound notification means 51 and 52 were activated. The indicating means 6 is 20 to 30 kg/
The range is between cm2. Furthermore, the weight of the entire container was measured, and the remaining amount was calculated by comparing it with the entire weight when full. As a result, the remaining amount was about 7% by weight, so it can be said that the remaining amount display is sufficiently practical.

[0018]

As the present invention is constructed and operates as described above, the remaining amount of high-pressure gas filled in the gas container is detected from the required pressure region, and the indicating means 6,
Since the display means 7 can be operated, it is possible to display the decrease in the remaining amount and how much remains. Further, when the notification means 30 is used in combination, a decrease in the remaining amount is notified by light and sound. Furthermore, since it is possible to continue displaying the remaining amount until the gas is completely exhausted, it is possible to display the remaining amount suitable for a high-pressure gas container.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an embodiment.

FIG. 2 is a longitudinal cross-sectional view during operation.

FIG. 3 is an exploded perspective view.

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is an external view of the installed state.

[Explanation of symbols]

1 Pressure chamber 2　Device body 3 Pressure sensitive part 4 Operating member 5 Pressure sensitive spring 6. Instruction means 7 Display means

Claims (4)

[Claims] 1. A device that displays the remaining amount of high-pressure gas filled in a gas container by detecting pressure, the device main body communicating with a pressure chamber 1 into which the gas pressure in the gas container is guided without being reduced. 2, an actuating member 4 which has a pressure sensitive part 3 at one end that receives the pressure in the pressure chamber and is provided in the main body 2 so as to be movable in the axial direction; A high-pressure gas container balance comprising a pressure sensitive spring 5 for moving the actuating member 4 in the axial direction, an indicating means 6 indicating the moving position of the actuating member 4, and a display means 7 for displaying the remaining amount at the position of the indicating means 6. Quantity display device. 2. The actuating member 4 includes an actuating shaft 21 having a sealing means 9 slidably inserted into a sliding chamber 8 communicating with the pressure chamber 1, and a pressure sensitive spring 5 serving as a spring holder for the actuating member. Axis 21
2. The remaining amount display device for a high-pressure gas container according to claim 1, further comprising an indicator 22 interposed between the indicator 22 and the indicator 22 having an indicator 6 provided on the outside thereof. 3. The display means 7 is an indicator 2 of the actuating member 4.
3. The remaining amount display device for a high-pressure gas container according to claim 2, further comprising a scale 26 in the direction of movement of the indicator, which is provided on the device main body 2 in a range in which the indicator 2 moves, along a portion through which the indicator 22 can be seen. 4. An operating chamber 34 for a second operating member 33 that is movably incorporated in the cross direction is provided in the device main body 2 communicating with the pressure chamber 1, and when the gas pressure in the pressure chamber decreases to a set value, 2. The remaining amount display device for a high-pressure gas container according to claim 1, further comprising a notification circuit 40 that closes and emits light or sound when the second actuating member 33 moves against the reduced gas pressure.