JPH1122701A - Gas plug for pressure vessel and gas feeding device for gas plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the feed of pressure gas by a gas feeding device of simple structure by simplifying the structure of the gas plug of a pressure vessel and preventing the occurrence of damage. SOLUTION: A passage 18 is arranged between threaded engagement of the mounting screw hole 12 of a shell 2 and the engagement screw 15 of a gas plug 10, and the passage 18 is sealed with pressure gas in a gas chamber by a seal ring 20. Further, the gas plug 10 is opened in a state to seal a recessed part with the gas plug 10 by a rotating tool coupled to the lock part 23 of the gas plug 10, and pressure gas is feedable to a gas chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a gas plug of a pressure vessel and a gas supply device for the gas plug. More specifically, the present invention relates to, for example, a gas plug of a pressure vessel for sealing by enabling gas to be supplied to a gas chamber of an accumulator and a gas supply device for the gas plug.

[0002]

2. Description of the Related Art FIG.
The accumulator shown in FIG.

FIG. 10 is a half sectional view of the accumulator. FIG. 11 is a half sectional view of a mounting portion of the gas valve of the accumulator. In FIG. 10, shell 5
1 is formed in a substantially cylindrical shape. And the shell 51
The cylindrical intermediate portion is welded to form an empty space 52 therein.

[0004] The empty chamber 52 of the shell 51 has a gas chamber 54 formed above a bladder 53 having a cylindrical shape, and a liquid chamber 55 formed below the bladder 53. The mounting portion 53a of the grading 53 is caulked to the lower side of the shell 51 in the drawing.

A liquid chamber 5 is provided below the shell 51 in the drawing.
5 is provided with a passage tube 56 that flows in and out. The passage tube 56 has a tube screw 56a formed on the outer periphery thereof so that the passage tube 56 can be connected to the piping.

Further, a gas valve 57 is provided for pressurizing a gas into the gas chamber 54 in the shell 51 and sealing it. The gas valve 57 is screwed into a gas valve case 58 mounted on the shell 51.

FIG. 11 is an enlarged half sectional view of a mounting portion of the gas valve 57. In FIG. 11, the shell 51 includes:
A mounting hole 51a is formed in the upper part of the figure. The gas valve case 58 is attached to the attachment hole 51a. In the gas valve case 58, a first screw portion 61 for a nut 60 is formed on the lower side of the case main body 59 in the drawing, and the nut 60 is tightened to the first screw portion 61 via a washer 62 so that a flange portion 63 is formed. Shell 51 between
Attached to

A second screw portion 64 is formed on the upper inner peripheral surface of the gas valve case 58, and the screw of the gas valve 57 is screwed and attached to the second screw portion 64.

Further, a third screw portion 65 is formed on the upper outer peripheral surface of the gas valve case 58, and a cap 66 is screwed and attached to the third screw portion 65 so that the gas valve 57 does not malfunction. I have.

[0010]

The gas valve 57 of the accumulator according to the prior art constructed as described above has a thin shell 51, so that the gas valve case 58 is assembled by a number of parts, and the assembled gas valve case 58 is assembled. Mounted on Moreover, the gas valve 57
When the valve rod is pushed, high-pressure gas is ejected, so a cap 66 is attached to protect the valve rod.

For this reason, since the gas valve case 58 projects farther than the shell 51, the shell 51 to which the gas valve 57 is attached is bent when the gas valve case 58 is hit by accident and the high-pressure gas in the gas chamber 54 is blown out. It may be developed into.

Further, since the gas valve case 58 is formed by assembling parts (when the shell 51 is thin and welding is performed, a hole is formed in the shell due to high heat action and welding becomes impossible). Gas will leak.

Further, the gas valve case 58 includes a shell 5
Due to the fact that the bladder 53 protrudes from the shell 51 to the side of the gas chamber 54 because of the assembly, the bladder 53 is damaged by receiving pressure in a contact state when the bladder 53 is inflated.

As another accumulator of the prior art, there is a gas valve shown in FIG.

FIG. 12 is a half sectional view of the accumulator. In FIG. 12, the gas plug 70 is
Is screwed into a screw 71 formed in the hole. The shell 51 and the gas plug 70 are sealed via an O-ring 72.

The gas plug 70 of this structure has a simpler structure than that of FIG.
Expensive equipment is required to pressurize the pressurized gas.

Therefore, it is difficult to supply or replenish gas to the pneumatic chamber 54 while the accumulator is mounted on an automobile or a hydraulic device, and the accumulator 50 is removed and transferred to a factory, and gas is supplied by an expensive gas injection equipment. Must be supplied to the gas chamber 54. Then, there arises such a problem that it must be attached to the automobile or the device again.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a technical problem in that the gas plug is configured not to protrude greatly from the outer surface of the pressure vessel and the gas chamber is also formed from the inner surface. To prevent it from protruding. Another object of the present invention is to make the size of the gas plug small and light. Another object is to reliably seal the gas in the gas chamber.

Another object of the present invention is to provide a gas supply device capable of easily supplying a pressure gas from a gas plug to a gas chamber.

[0020]

Means for Solving the Problems The present invention provides: The present invention has been made to solve the above-described problem, and the technical means thereof is configured as follows.

According to a first aspect of the present invention, there is provided a mechanism for screwing into a mounting screw hole (12) passing through an outer surface (13) and an inner surface (14) of a pressure vessel (1) in which a gas chamber (7) is formed. A shaft portion (16) having a set screw (15) on the outer peripheral surface, a head (17) having one end of the shaft portion (16), and a head (17)
Or, an end portion (9) of the shaft portion (16) is provided with a locking portion (23) coupled to a turning portion (46) of a turning tool (45) for turning the engaging screw (15), A passage (18) communicating between the gas chamber (7) and the atmosphere is provided between the engagement screw (15) and the screw hole (12), and is bonded to the bonding surface (19) of the head (17). Pressure vessel (1) to which surface (19) joins
And a seal ring (20) for blocking the passage (18) between the joint ring and the joint surface of the seal member.

According to a second aspect of the present invention, a fitting screw (2) having the same pitch as the engaging screw (15) is provided on the outer peripheral surface of the head (17).
2. The gas plug for a pressure vessel according to claim 1, wherein 1) is formed.

Further, according to the present invention, the gas plug (1) is loosened by loosening the gas plug (10) of the pressure vessel (1).
Pressure gas from the passage (18) in the gas chamber (7)
A gas supply device for a gas plug (10), which supplies and seals the gas plug (10) to the outside of the pressure vessel (1).
2), a seating surface (34) joined to the outer surface (13) at the outer periphery of the concave portion (32), and a seal disposed between the seating surface (34) and the outer surface (13) to seal between the two joining surfaces. Department (3
6) and fixing means (28) for joining the seal portion (36) and fixing the seating surface (34) to the outer surface (13).
And a main body (31) having a supply passage (37) communicating with the inside and the outside of the recess (32) and introducing a pressure gas, and a guide hole (32) penetrating through the recess (32) of the body (31) and the outside. 41) is provided with a rotating tool (45) which is movable by a predetermined stroke by fitting to the rotating tool (45), and the rotating tool (45) is connected to the locking portion (23) of the gas plug (10) at the tip. And a rotating handle (47) at the other end.

According to a fourth aspect of the present invention, there is provided a moving screw (33) formed at the same pitch as the engaging screw (15) on the inner peripheral surface of the concave portion (32). A fitting screw (21) to be screwed is provided on the outer peripheral surface of the head (17), and the moving screw (33) of the recess (32) and the head (1) are screwed.
7) Supply passage (37) between screwing with fitting screw (21)
The gas supply device for a gas plug according to claim 3, further comprising a second supply passage (37a) communicating with the gas plug.

[0025]

The pressure vessel 1 is provided with a mounting screw hole 12, and the engagement screw 15 of the gas plug 10 is screwed into the mounting screw hole 12 in a slightly loosened state. Then, the pressurized gas is introduced into the concave portion 32 from the gas supply passage 37 by using the gas supply device 30. The introduced pressure gas is introduced into the passage 18 through the gap between the sealing surfaces of the seal ring 20 and supplied to the gas chamber 7 because the gas plug 10 is loosened.

When the gas chamber 7 reaches the set pressure, the supplied pressure gas connects the rotating portion 46 provided at the tip of the rotating tool 45 to the engaging portion 23 of the gas plug 10. By turning the handle 47, the gas plug 10 is fastened to the mounting screw hole 12. Then, the pressure gas supplied into the gas chamber 7 is sealed.

When the gas pressure in the pressure vessel 1 decreases, the gas supply device 30 is attached to the pressure vessel 1 as described above, and the turning tool is turned to loosen the gas plug 10 so that the pressure gas is supplied to the gas chamber. 7 Then, the turning tool 45 is turned to fasten the gas plug 10 to the pressure vessel 1.

As described above, the gas plug 10 capable of supplying the pressurized gas into the pressure vessel 1 has a simple structure in which only the gas plug 10 and the seal ring 20 are mounted in the mounting screw holes 12. It does not protrude from the pressure vessel 1. For this reason, the gas plug 10 is not damaged and an accident due to the high-pressure gas is not caused, and the thin pressure vessel 1 can be formed to achieve a reduction in weight or size.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a gas plug of a pressure vessel and a gas supply device for the gas plug according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view of an accumulator according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view showing a mounting portion of the gas plug of FIG.

In FIG. 1, reference numeral 1 denotes a pressure vessel as an accumulator. The accumulator 1 is provided with a shell 2 formed by processing a steel plate and forming a cylindrical shape with a bottom. The opening 3 of the shell 2 is closed by a port cover 4. The inside of the shell 2 is formed in the empty room 5.

Since the thickness of the shell 2 is thin, it is joined to the port cover 4 by caulking the opening 3.

The empty chamber 5 of the shell 2 is separated into a gas chamber 7 and a liquid chamber 8 by a bladder 6 made of a rubber material (or a resin material). The fluid flows into and out of the liquid chamber 8 from the port 4a provided in the port cover 4, compresses the gas chamber 7, and absorbs the lid pressure and the pulsation in the fluid.

The gas pressure in the gas chamber 7 determines the lid pressure,
The pulsation absorption capacity will be determined. For this reason, a gas plug 10 is provided on the upper part of the shell 2 in the drawing, and the gas is supplied from the gas plug 10 to the gas chamber 7 and the gas is sealed in the gas chamber 7.

The upper portion of the shell 2 is formed in an annular mounting portion 11 by bending a steel plate of the shell 2 into a cylindrical shape in order to mount the gas plug 10. A mounting screw hole 12 is formed in the inner peripheral surface of the mounting portion 11. The outer surface 13 surrounding the mounting portion 11 of the shell 2 is formed in a slightly concave flat shape. Further, the inner surface 14 is similarly formed in a planar shape.

In FIG. 2, the mounting screw hole 12 of the mounting portion 11
, A gas plug 10 is screwed. The gas plug 10 is formed in a bolt shape including a shaft portion 16 and a head portion 17 formed at one end of the shaft portion 16.

The shaft portion 16 is provided with an engagement screw 15 on the outer peripheral surface, and a groove-like passage 18 through which gas flows is formed over the axial length of the shaft portion 16. A plurality of the passages 18 may be formed evenly. Also, in the mounting screw hole 12,
The groove-shaped passage 18 may be formed. Further, a groove may be provided in both the mounting screw hole 12 and the engaging screw 15 to form a passage 18 formed by the two.

Next, a head 17 is formed at one end of the shaft 16. A mounting groove 27 for mounting the seal ring 20 is formed on the outer peripheral side of the passage 18 on the bonding surface 19 of the head 17 which is joined to the outer surface 13 of the shell 2. The mounting groove 27 may be provided on the shell 2 side. That is, since the mounting groove 27 is provided to prevent the gas in the gas chamber 7 from flowing out, the mounting groove 27 has the same function regardless of which member is provided and pressed. This mounting groove 2
7 is provided with a seal ring 20 made of a rubber material.

A fitting screw 21 is provided on the outer peripheral surface of the head 17.
The fitting screw 21 is also formed with a groove-shaped second supply passage 37a which is deeper than the fitting screw 21 in the axial direction.

Further, a groove-shaped locking portion 23 is formed at the upper end 9 of the head 17 so as to be coupled with the rotating portion 46 of the rotating tool 45 so that the engaging screw 15 can be rotated. It is configured.

A cap 24 is screwed into the gas plug 10. Although this cap 24 is not particularly required, a rubber gasket 26 is provided in the opening 25 of the cap 24, and the outer surface 13 is sealed with the seal ring 2.
With 0, it can be double sealed. further,
The function of protecting the head 17 and the effect of preventing the gas plug 10 from loosening are also exerted.

FIG. 3 is a sectional view showing a mounting portion of a gas plug according to another embodiment of the present invention.

In FIG. 3, the gas plug 10 has a head 17
Is disposed in the gas chamber 7 of the shell 2 and the shaft portion 16 is disposed outside and screwed into the mounting screw hole 12.

The groove-shaped locking portion 23 for rotating the gas plug 10 is formed at the end 9 of the shaft 16.
A mounting groove 27 is provided on the adhesive surface 19 of the head 17, and a seal ring 20 is mounted in the mounting groove 27, and the seal ring 20 is mounted in the mounting groove 27. Other configurations are substantially the same as those of the gas plug 10 and the mounting portion 11 shown in FIG.

The gas plug 10 shown in FIG.
By rotating the rotary tool 45 and moving it into the gas chamber 7 via the engagement screw 15 by rotating, the sealing surface of the seal ring 20 is fixed to the inner surface 14 of the shell 2.
Therefore, the gas chamber 7 and the outside communicate with each other through the passage 18.

FIG. 4 is a sectional view of a mounting portion of a gas plug showing still another embodiment according to the present invention.

In FIG. 4, the gas plug 10 is
And the head 17 are formed to have substantially the same diameter. An annular mounting groove 2 for mounting a seal ring 20 is provided in the head 17.
7 has been cut. Further, a locking portion 23 having a hexagonal hole is formed in the end 9 of the head 17. An engaging screw 15 is formed on the outer peripheral surface of the shaft portion 16 below the mounting groove 27 for mounting the seal ring 20, and a groove-shaped passage 18 is formed along the axial direction of the engaging screw 15. Is formed.

Mounting screw hole 1 into which gas plug 10 is screwed
2 is drilled in the shell 2 and the mounting portion 11 welded to the shell 2. The upper surface of the mounting screw hole 12 facing the mounting groove 27 is an inner peripheral surface 29 fitted with the head 17.
Is formed. Further, a fitting screw 21 is formed on the outer peripheral surface of the mounting portion 11.

The above three embodiments have been described. Although descriptions of other embodiments are omitted, inventions similar to the above three embodiments are considered to be the same invention. When the gas plug 10 is rotated in the loosening direction to communicate the passage 18 in and out, the gas supply device can easily supply the pressure gas to the gas chamber 7. Further, the gas can be easily sealed in the gas chamber 7 by rotating the gas plug 10.

Further, since the gas plug 10 does not protrude more than the outer surface 13 of the shell 2, the gas plug 1
Also, it is possible to prevent the 0 from being damaged during handling.

Further, as in the conventional case, the pressure vessel (accumulator) 50 is detached from the apparatus, carried into the factory, and attached to a special gas supply facility, so that a large-sized facility for supplying a pressurized gas by an expert is not required. It can be.

FIG. 5 is a sectional view of an accumulator which is a pressure vessel according to still another embodiment of the present invention.

This accumulator is a small one used for automobiles and construction machines. Accumulator 1
The empty space of the spherical shell 2 is partitioned into a gas chamber 7 and a liquid chamber 8 by a hemispherical bladder 6.

The gas plug 10 capable of supplying gas to the gas chamber 7 is directly mounted on a mounting portion 11 provided on a part of the spherical shell 2. This gas plug 10 is similar to the configuration shown in FIG. The gas plug 10 has a passage 1 in the mounting screw hole 12.
8 are provided, and the fitting screw 21 is also provided with a second supply passage 37a.

FIG. 6 is a sectional view of a gas supply device for a gas plug of a pressure vessel showing an embodiment according to the present invention.

In FIG. 6, the gas plug 10 of the pressure vessel
Is similar to the configuration shown in FIG. The gas supply device 30 supplies a pressure gas from the gas plug 10 into the gas chamber 7. The gas supply device 30 is roughly divided into a main body 31 and a rotating tool 45.

The main body 31 has a concave portion 32 formed on the lower side in the figure. A moving screw 33 is formed on the inner peripheral surface of the concave portion 32, and the pitch of the moving screw 33 is the same as the pitch of the engaging screw 15.

The outer surface 13 of the shell 2 on the outer periphery of the concave portion 32
An annular groove 35 for mounting a seal portion 36 is formed in a seating surface 34 that is joined to the seating surface 34. An annular seal portion 36 is disposed in the annular groove 35.

The main body 31 has a supply passage 37 for communicating the recess 32 with a pressure gas supply source (not shown).
A joint thread 38 is provided which can be connected to a hose for supplying gas to the common passage 37. Further, a second supply passage 37 a is formed in the recess 32 in the shape of a groove in the central axis direction of the recess 32 traversing the moving screw 33. The second supply passage 37 a is provided with the fitting screw 2 of the gas plug 10.
It can be provided on one side. Further, grooves are provided in both the moving screw 33 and the fitting screw 21 so that the second supply passage 37a is provided.
May be formed.

Further, a communication passage 39 communicating with the recess 32 is provided in the main body 31.
0 is attached.

The main body 31 has a guide hole 41 penetrating the recess 32 from outside. An annular O-ring groove 42 is formed in the guide hole 41. And
A stopper 43 is attached to the upper part of the guide hole 41 in the drawing, and a second guide hole 41 having a smaller diameter than the guide hole 41.
a is formed.

A rotary tool 45 penetrating the guide hole 41 and the second guide hole 41a is slidably fitted by a predetermined stroke. The predetermined stroke is a distance from the position at which the step portion 49 contacts the stopper 43 to the position at which the rotating portion 46 is coupled to the locking portion 23. The turning tool 45 is provided at its tip with a form of turning portion 46 formed so as to be connectable to the locking portion 23 of the gas plug 10 and turning the gas plug 10.
A handle 47 is provided at an end of the turning tool 45 opposite to the turning portion 46. By turning the handle 47, the one-shaped rotating part 46 is connected to the groove-shaped engaging part 23 of the gas plug 10, and the engaging screw 15 of the gas plug 10 is engaged.
And the mounting screw hole 12 are relatively moved. It should be noted that the handle 47 includes everything that rotates the rotary tool 45.

The rotating tool 45 has a shaft 4 having a small diameter in the middle.
A predetermined stroke of the rotary tool 45 is set by the length of the shaft 48. That is, the stroke is determined by the step portions 49 at both ends of the shaft 48 contacting the stopper 43. O-ring groove 4
The gap between the rotary tool 45 and the guide hole 41 is sealed by an O-ring 44 attached to the second member 2. The moving screw 33 of the main body 31 and the gas plug 10 attached to the shell 2
The fixing means 28 is constituted by the fitting screws 21 of the above.

FIGS. 7, 8 and 9 are sectional views showing the operation of the gas supply device 30 for the gas plug shown in FIG.

In FIG. 7, the fitting screw 2 of the gas plug 10
The main body 31 is rotated by screwing the moving screw 33 of the main body 31 of the gas supply device 30 into 1. Then, the seating surface 34 of the main body 31 is joined to the outer surface 13 of the shell 2 as shown in FIG. This connection constitutes the fixing means 28. At this time, the seal portion 36 seals between the joining surfaces to block the inside of the recess 32 from the outside.

Next, the rotating tool 45 is pushed down by a predetermined stroke toward the gas plug 10 so that the locking portion 2 of the gas plug 10 is
The rotating part 46 is connected to the third part 3. Then, as shown in FIG. 9, when the handle 47 is rotated, the engagement screw 15 and the engagement screw 21 of the gas plug 10 are formed at the same pitch. Outer surface 13 of
The gas plug 10 can be moved in the direction of pulling out of the shell 2 while being pressed against the shell.

At this time, since the sealing surface of the seal ring 20 of the gas plug 10 forms a gap between the outer surface 13 and the gas chamber 7 of the shell 2 and the recess 32, the passage 18 and the second supply passage 37a are formed. Will be communicated through. Then, the pressure gas flows from the supply source of the pressure gas into the gas chamber 7 through the supply passage 37.

At this time, when the gas pressure gauge 40 shown in FIG. 6 reaches the set pressure, the handle 47 of the rotating tool 45 is turned to tighten the gas plug 10 to the shell 2. The gas in the gas chamber 7 is sealed.

With the gas chamber 7 of the shell 2 sealed with the gas plug 10, the gas plug 1 is
When the main body 31 is turned while the rotation of the main body 31 is stopped, the main body 31 can be detached from the gas plug 10. Then, as shown in FIG.
The gas plug 10 is screwed into the fitting screw 21 of the gas plug 10.
Gas plug 10 and gasket 26
To ensure a double seal. Further, the gasket 26 of the cap 24 is pressed against the gasket, so that the effect of preventing the gas plug from loosening is also exerted.

In the case of the gas plug 10 shown in FIG.
The moving screw 33 of the gas supply device 30 is screwed to the fitting screw 21 provided on the shell 2 to connect the gas supply device 30 to the shell 2.
A fixing means 28 for fixing to the surface is constituted. Then, the gas plug 10 can be moved into the gas chamber 7 by connecting the rotating part 46 of the rotating tool 45 to the locking part 23. For this reason, since the recess 32 of the gas supply device 30 and the gas chamber 7 communicate with each other through the passage 18, the gas can be supplied to the gas chamber 7 of the shell 2 and sealed in the same manner as described above.

The gas plug 10 shown in FIG. 4 has a mounting portion 1 in which the moving screw 33 of the gas supply device 30 is welded to the shell 2.
1, or when the thickness of the shell 2 is thin, the mounting portion 11 formed by deep drawing a part of the shell 2 as shown in FIG.
To form a fixing means 28 by screwing into the fitting screw 21 of the gas supply device 30, and insert the rotating part 46 formed in the hexagonal rod of the gas supply device 30 into the locking part 23 formed in the hexagonal hole of the gas plug 10. By rotating the handle 46 of the rotating tool 45, the gas plug 10 is moved upward to form a gap in the sealing surface of the sealing 20, and the gas chamber 7 and the gas supply passage 37 can be communicated. become.

In the case of the pressure vessel shown in FIG. 5, except that the seating surface 34 of the gas supply device 30 is formed in an arc surface so as to be joined to the outer surface 13 of the shell 2, the gas supply device 3 shown in FIG.
The gas supply device 30 having substantially the same configuration as that of the gas supply device 0 can supply gas to the gas chamber 7.

It is also possible to use fixing means 28 for fixing the gas supply device 30 to the mounting portion 11 of the shell 2 using bolts without screwing the gas supply device 30 to the screw on the shell 2 side. Then, as described above, the gas plug 11 is loosened from the mounting screw hole 12, and the pressure gas can be supplied into the pressure vessel.
All of these techniques belong to the same invention as described above.

[0074]

According to the gas plug of the pressure vessel according to the first aspect of the present invention, a passage is provided between the engaging screws screwed into the mounting screw holes of the shell, and when the gas plug is loosened from the mounting screw holes. With a gas supply device having a simple structure, gas can be supplied into the gas chamber with the pressure vessel attached to the device. At the same time, the gas plug does not protrude larger than the shell, and it is possible to design the gas plug smaller if necessary. Can be effectively prevented.

The gas plug of the pressure vessel according to the second aspect of the present invention is provided with a fitting screw on the outer peripheral surface of the head of the gas plug, the screw having the same pitch as the engaging screw of the shaft. When the moving screw of the gas supply device is screwed, the gas plug can be loosened while the seating surface of the gas supply device is pressed against the shell. This makes it possible to supply the pressure gas while securely sealing the gas supply passage by the seal portion provided on the seating surface when the gas plug is loosened. Also, by engaging the cap with the fitting screw of the gas plug, the engaging screw and the fitting screw have the same pitch, so that the opening of the cap is joined to the outer surface of the shell for sealing, A detent effect can be expected.

According to the third aspect of the present invention, a gas supply device for supplying gas from a gas plug of a pressure vessel can easily supply a pressure gas from a gas plug of the first aspect to a gas chamber in the pressure vessel. It is possible to easily seal the pressure gas supplied to the chamber. For this reason, it becomes possible to prevent the gas plug of the pressure vessel from being small and damaged. At the same time, gas can be supplied with the pressure vessel attached to the device.

According to the gas supply apparatus for supplying pressure from the gas plug of the pressure vessel according to the fourth aspect of the present invention, it is possible to easily supply gas from the gas plug according to the second aspect to the gas chamber in the pressure vessel. Become. At the same time, the gas supplied to the gas chamber can be reliably sealed. In addition, at the time of gas supply, the effect of sealing the sealing portion by sealing the seating surface to the shell so that the gas leaks outward from the passage can be expected. Furthermore, since the gas supply device can be fixed to the shell simply by screwing the moving screw of the gas supply device into the fitting screw of the gas plug, the pressure gas is supplied to the pressure container without removing the pressure container. Will be able to do it. In addition, it is possible to obtain a small, lightweight and inexpensive gas supply device.

[Brief description of the drawings]

FIG. 1 is a side view of a pressure vessel according to an embodiment of the present invention.

FIG. 2 is a sectional view of a mounting portion of the gas plug shown in FIG.

FIG. 3 is a cross-sectional view of a mounting portion of a gas plug according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view of a mounting portion of a gas plug according to yet another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a pressure vessel showing still another embodiment according to the present invention.

FIG. 6 is a cross-sectional view of a gas supply device for a gas plug of a pressure vessel showing an embodiment of the present invention.

7 is a cross-sectional view showing a state where the gas supply device for a gas plug of FIG. 6 is mounted on a mounting portion of the gas plug.

8 is a sectional view showing a state in which the gas supply device for a gas plug of FIG. 6 is attached to a gas plug attachment portion.

9 is a cross-sectional view of a state in which the gas supply device for a gas plug of FIG. 6 is attached to a gas plug attachment portion to supply gas.

FIG. 10 is a side view of a conventional accumulator.

FIG. 11 is an enlarged side view of the gas valve of FIG. 10;

FIG. 12 is a sectional view of another conventional accumulator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pressure vessel (accumulator) 2 ... Shell 3 ... Opening 4 ... Port cover 4a ... Port 5 ... Vacancy 6 ... Bladder 7 ... Gas chamber 8 ...・ Liquid chamber 9 ・ ・ ・ End 10 ・ ・ Gas plug 11 ・ ・ Mounting part 12 ・ ・ Mounting screw hole 13 ・ ・ Outer surface 14 ・ ・ Inner surface 15 ・ ・ Engaging screw 16 ・ ・ Shaft 17 ・ ・ Head 18 ··· Passage 19 ··· Adhesive surface 20 ··· Seal ring 21 ··· Fitting screw 23 ··· Locking part 24 ··· Cap 25 ··· Opening 26 ··· Gasket 27 ··· Mounting groove 28 ··· Fixing means 29・ Inner peripheral surface 30 ・ ・ Gas supply device 31 ・ ・ Main body 32 ・ ・ Recess 33 ・ ・ Moving screw 34 ・ ・ Seat surface 35 ・ ・ Circular groove 36 ・ ・ Seal 37 ・ ・ Supply passage 37a ・ Second supply passage 38 joint thread 39 communicating passage 40 pressure gauge 41 Guide hole 41a, second guide hole 42, groove for O-ring 43, stopper 44, O-ring 45, rotating tool 46, rotating part 47, handle 48, shaft 49, step 50, accumulator 51, shell 52, empty space 53, bladder 53a, mounting part 54, gas chamber 55, liquid chamber 56, passage pipe 57, gas valve 58, gas valve case 59, case body 60 Nut 61 First thread 62 Washer 63 Flange 64 Second thread 65 Third thread 66 Cap 70 Gas valve

Claims (4)

[Claims] An engaging screw (15) screwed into a mounting screw hole (12) passing through an outer surface (13) and an inner surface (14) of a pressure vessel (1) forming a gas chamber (7) therein. A shaft portion (16) provided on an outer peripheral surface, a head (17) provided at one end of the shaft portion (16), and an end (9) of the head (17) or the shaft portion (16). A locking portion (23) for coupling to a rotating portion (46) of a rotating tool (45) for rotating the set screw (15); the engaging screw (15) and the mounting screw hole (12); A passage (18) communicating with the gas chamber (7) and the atmosphere side between the screw head and the head (1).
7) the passage (18) between the bonding surface (19) of the pressure vessel (1) and the bonding surface of the pressure vessel (1) where the bonding surface (19) is bonded;
A gas plug for a pressure vessel, comprising a seal ring (20) for shutting off pressure. 2. The pressure vessel according to claim 1, wherein a fitting screw (21) having the same pitch as the engaging screw (15) is formed on an outer peripheral surface of the head (17). Gas plug. 3. The gas plug (10) of the pressure vessel (1) is loosened to supply pressure gas to the gas chamber (7) from a passage (18) provided in the gas plug (10) and to seal the gas chamber. A gas supply device for a gas plug (10), comprising: a recess (32) for accommodating a projection of the gas plug (10) projecting from an outer surface (13) of the pressure vessel (1);
A seating surface (34) joined to the outer surface (13) at the outer periphery of the concave portion (32); and the seating surface (34) and the outer surface (1).
And a sealing portion (36) disposed between the outer surface (13) and the sealing portion (36) for sealing between the two joining surfaces; and a fixing portion for joining the sealing portion (36) and fixing the seating surface (34) to the outer surface (13). A body (31) having means (28) and a supply passage (37) for communicating a pressure gas with the inside and the outside of the recess (32), and the recess (32) of the body (31) and the outside; And a rotating tool (45) fitted in a guide hole (41) penetrating through the shaft and being movable by a predetermined stroke. A gas supply device for a gas plug, comprising: a rotating portion (46) for rotating in combination with a locking portion (23); and a handle (47) for rotating on the other end. 4. A moving screw (3) formed on the inner peripheral surface of the recess (32) at the same pitch as the engaging screw (15).
3) having a fitting screw (21) for screwing with the moving screw (33) on the outer peripheral surface of the head (17);
And a second supply passage (37a) communicating with the supply passage (37) between a screw of the moving screw (33) of the recess (32) and a fitting screw (21) of the head (17). The gas supply device for a gas plug according to claim 3, wherein: