JP2590202Y2 - Cylinder valve with remaining amount display - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder valve provided with a device for displaying the remaining amount of gas in a gas cylinder.

[0002]

2. Description of the Related Art An example of this kind of remaining amount display device is disclosed in Japanese Utility Model Publication No. 2-28320 previously proposed by the present applicant. This conventional technique is configured as follows, as shown in FIG. An operation hole 71 extending in the vertical direction is provided in the valve box 53 of the cylinder valve 52, and a display hole 88 is provided on the side of the operation hole 71. An operation magnet 74 is fixed above the operation rod 72 inserted into the operation hole 71, and the display magnet 89 inserted into the display hole 88 is vertically moved by the attraction force of the operation magnet 74. Let them follow. A cushion spring 90 is mounted between the bottom wall of the display hole 88 and the display magnet 89.

[0003]

By the way, during a gas filling operation or a gas extracting operation, the operation rod 72 moves up and down rapidly due to an impact applied to the gas cylinder, and the display magnet 89 is moved to the operation magnet 74. May be out of the range of the suction follow-up. Even in such a case, the above-described related art is excellent in that the display magnet 89 can be received by the cushion spring 90 to fall by its own weight, and erroneous display can be prevented.

[0004] However, with the recent expansion of the use of cylinder valves, the following improvements have been demanded in the above prior art. In order to provide the display hole 88 on the side of the operation hole 71, it is necessary to project the valve box 53 laterally, and the width of the valve box 53 is increased by the amount of the protrusion. For this reason, the remaining amount display device could not be mounted on a cylinder valve already standardized with a small width. An object of the present invention is to make it possible to reduce the width of a cylinder valve even when a remaining amount display device is mounted.

[0005]

According to the present invention, in order to achieve the above object, the remaining amount display device is constituted as follows, for example, as shown in FIGS. An operation hole 21 extending vertically is provided in the valve box 3 of the cylinder valve 2, and a display hole 38 extending vertically is provided above the operation hole 21, and the gas cylinder 1 is provided in the operation hole 21. Operation rod 2 that moves up and down according to the amount of gas remaining in the chamber
2, the operation magnet 24 is provided above the operation rod 22, and the display magnet 39 repelling the operation magnet 24 is inserted into the display hole 38.

[0006]

According to the present invention, for example, as shown in FIGS.
It works as follows. When the remaining amount of gas in the gas cylinder 1 is small, the operation rod 22 moves down and the display hole 38
The display magnet 39 inside is also lowered. When gas is charged into the gas cylinder 1, the operation rod 22 and the operation magnet 24 rise as the gas amount in the gas cylinder 1 increases, and the repulsive force M of the operation magnet 24 causes the display magnet 39 to have its own weight. It is raised against.

On the other hand, when gas is taken out of the gas cylinder 1, as the remaining amount in the gas cylinder 1 decreases, the operating rod 22 and the operating magnet 24
Goes down. Then, the display magnet 39 descends by its own weight in a state of being floated by the repulsive force M of the operation magnet 24.

As described above, since the repulsive force from the operation magnet 24 always acts on the display magnet 39 in the direction opposite to its own weight, unlike the conventional example, the operation rod 22 is affected by the impact applied to the gas cylinder 1. Does not drop even if the camera moves rapidly up and down, no erroneous display occurs.

[0009]

The present invention has the following effects because it is constructed and operates as described above. Since the display hole is provided above the operation hole, there is no need to project the valve box sideways, and the width of the valve box can be reduced.

In addition, since the display magnet is levitated by the repulsive force of the operation magnet, there is no need to provide a means for preventing the display magnet from dropping, and the conventional cushion spring can be omitted. . For this reason, the number of parts of the remaining amount display device is reduced, the production cost is reduced, and the maintenance is not required. Furthermore, the omission of the cushion spring increases the allowable range of elevation of the display magnet, so that the display range is widened.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a detailed view of a portion indicated by an arrow I in FIG. 2 and is a longitudinal sectional view of the remaining amount display device. FIG. 2 is a longitudinal sectional view of a cylinder valve provided with the above-mentioned remaining amount display device. FIG. 3 is a cross-sectional view taken along line III-III in FIG.

First, the overall configuration will be described with reference to FIGS. At the top of the gas cylinder 1 containing liquefied gas,
The lower screw portion 4 of the valve box 3 of the cylinder valve 2 is screwed. The above-mentioned valve box 3 is formed to be long in the up-down direction, and a height portion in the middle thereof is formed substantially in a square in plan view. A gas inlet 5 is opened in the lower surface 3a of the valve box 3, and a gas outlet 6 is formed on the right side of the upper part of the valve box 3 in the same. The gas inlet 5 has a gas inlet passage 7 extending vertically and a closing valve chamber 8.
And the gas outlet 6 in this order. The closing member 9 inserted into the above-mentioned closing valve chamber 8 is opened and closed by the closing valve seat 11 by the handle 10.

The primary safety valve 13 attached to the above valve box 3
Is constructed by mounting a rupturable plate 15 on a relief path 14 branched from the gas inlet path 7. A gas extraction fitting and a gas filling fitting (both not shown) are externally fitted to the valve box 3 from above and are connected to the gas outlet 6 in a hermetically sealed manner. Reference numeral 17 denotes a positioning hole for a metal fitting. A gas filling pipe 19 is screwed to the gas inlet 5.

The cylinder valve 2 is provided with a device for displaying the remaining amount of the liquefied gas contained in the gas cylinder 1. An operation hole 21 extending vertically is formed in a lower portion of the valve box 3, and an operation rod 22 is inserted into the operation hole 21 so as to be vertically movable. An operation magnet 24 is fixed to an operation piece 23 provided at an upper end of the rod 22, and a float 25 is connected to a lower end of the rod 22. Further, a tension spring that elastically presses the rod 22 upward is provided between a lower spring receiver 26 fixed to a middle portion of the rod 22 by screws and an upper spring receiver 27 fixed to a lower part of the valve box 3. 28 are mounted.

When the liquid level of the liquefied gas in the gas cylinder 1 changes during gas removal or gas filling, the buoyancy acting on the float 25 also changes. The balance between the changing buoyancy and the tension of the tension spring 28 causes the operation magnet 24 to move up and down via the operation rod 22. The means for visually confirming the movement of the operation magnet 24 from outside the valve box 3 is configured as follows.

As shown mainly in FIG. 1, a display chamber 31 is recessed above the operation hole 21, and a display cassette 32 is press-fitted and fixed in the display chamber 31. The display cassette 32 includes a transparent outer pipe 33 and an inner pipe 3.
The inner pipe 34 is formed to be slightly shorter than the outer pipe 33. Rubber plugs 35 and 36 fitted into the upper and lower portions of the outer pipe 33 are received by the inner pipe 34.

The cylindrical hole of the inner pipe 34 forms a display hole 38 extending in the vertical direction.
8, a display magnet 39 is inserted to be vertically movable. The display magnet 39 and the operation magnet 24 are configured to repel each other.

The above-mentioned display magnet 39 is formed by vertically fixing three magnet pieces 39a, 39b and 39c. The magnet piece 39b on the center side is colored, and the level in the gas cylinder can be detected by visually recognizing the height position from the outside. In addition, a remaining scale is provided on the outer peripheral surface of the outer pipe 33.

The display magnet 39 may be formed by joining display pieces made of colored resin or metal between upper and lower magnet pieces. Further, the display magnet 39 may be configured by only one magnet piece, or may be configured by joining the display piece to the upper surface of the one magnet piece.

FIG. 4 shows a modification, in which the remaining amount of the compressed gas filled in the gas cylinder can be detected. This modified example is different from the above-described embodiment in the following point. In the modification, members having the same configuration as those of the above-described embodiment are given the same reference numerals in principle.

The upper part of the support cylinder 43 is screwed and fixed to the lower part of the peripheral wall of the operation hole 21 in an airtight manner. The support cylinder 43 includes an upper cylinder 44 and a lower cylinder 45, and the upper cylinder 4
The operation rod 22 is hermetically inserted into the cylindrical hole 4 via an O-ring 46. A tension spring 48 is mounted between a lower portion of the operation rod 22 and a lower pin 47 of the lower cylinder 45. The balance between the upward gas pressure acting on the pressure receiving cross-sectional area of the operation rod 22 and the tension of the spring 48 moves the operation rod 22 in the vertical direction. As a result, the display magnet 39 is moved vertically by the operation magnet 24 provided above the rod 22.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a remaining amount display device showing an embodiment of the present invention, and is a detailed view of an arrow I portion in FIG. 2;

FIG. 2 is a longitudinal sectional view of a cylinder valve provided with the above-mentioned remaining amount display device.

FIG. 3 is a sectional view taken on line III-III of FIG. 2;

FIG. 4 shows a modification of the cylinder valve,
FIG.

FIG. 5 is a view showing a conventional example and corresponding to FIG. 1 described above.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... gas cylinder, 2 ... cylinder valve, 3 ... valve box, 21 ...
Operation hole, 22: Operation rod, 24: Operation magnet, 38: Display hole, 39: Display magnet.

Claims (1)

(57) [Scope of request for utility model registration] 1. An operation hole (21) extending vertically in a valve box (3) of a cylinder valve (2), and a display hole (vertically) extending above the operation hole (21). 38), and an operation rod (22) that moves in the vertical direction according to the remaining amount of gas in the gas cylinder (1) is inserted into the operation hole (21), and the operation rod (22) is Operation magnet on top
(24), and the operation magnet (2) is provided in the display hole (38).
4. A cylinder valve with a remaining amount display device, wherein a repelling display magnet (39) is inserted in 4).