JP2003056703A - High-pressure fluid vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the speed of a closing operation of a high-pressure fluid vessel and to solve a problem of early deterioration of packing. SOLUTION: This high-pressure fluid vessel is provided with a vessel body 1, a vessel lid 5 closing an opening part 2 of the vessel body 1, a seal ring 8 interposed between the inner circumferential surface 2a of the opening 2 and the outer circumferential surface 6a of an opening fitting part 6 of the vessel lid 5, and latch means 10 preventing the vessel lid 5 from being pulled out from the opening part 2. This vessel closes the opening part 2 by the vessel lid 5 without clamping the seal ring 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high pressure fluid container for handling a supercritical fluid or a subcritical fluid such as carbon dioxide.

[0002]

2. Description of the Related Art In recent years, high-pressure processes used for industrial applications have been diversified in their applications and the pressure range used has been widened. The high-pressure process includes, for example, opening operation of the high-pressure fluid container, loading / unloading of the object to be processed, closing operation of the container, filling / pressurization of liquefied carbon dioxide gas into the container, under supercritical fluid or subcritical fluid. It is performed by repeating treatment, depressurization in the container, and the like. As the high-pressure fluid container, conventionally, for example, a seal ring is mounted between the facing surfaces of the flange of the container body opening and the flange of the container lid, and the entire circumference of the facing flange is evenly divided by a plurality of fastening bolts. Some of them are to be fastened, or some of the flanges are arranged to face each other, and a split fastening ring is externally fitted, and the fastening ring is fastened in the radial direction to uniformly fasten the flange over the entire circumference. Is also configured to sandwich and seal a seal ring mounted between the facing surfaces of the flange.

[0003]

However, according to the former, it takes time to uniformly tighten the plurality of fastening bolts. According to the latter, it is necessary to fasten the flanges arranged facing each other substantially evenly with the fastening ring, which is troublesome for fastening both flanges. Further, in both cases, since the seal ring mounted between the facing surfaces of the flange is strongly pinched, the seal ring deteriorates early. The present invention has been made in view of such circumstances, and an object thereof is to speed up the sealing operation of the high-pressure fluid container and solve the problem of early deterioration of the seal ring.

[0004]

In order to solve the above problems, the present invention is configured as follows. That is, claim 1
The high-pressure fluid container described in 1. is a container body 1, a container lid 5 that closes an opening 2 of the container body 1, an inner peripheral surface 2a of the opening 2 and an outer periphery of an opening fitting portion 6 of the container lid 5. It is characterized by including a seal ring 8 interposed between the surface 6a and a retaining means 10 for retaining the container lid 5 from the opening 2.

According to a second aspect of the present invention, in the high-pressure fluid container according to the first aspect, a ring groove 7 is provided on the outer peripheral surface 6a of the opening fitting portion 6, and the ring groove 7 is self-tightening type. A seal ring 8 is provided, and the inner peripheral surface 2a of the opening is formed by the pressure inside the container.
It is characterized in that it is configured to seal a gap between the opening fitting portion 6 and the opening fitting portion 6.

According to a third aspect of the present invention, in the high pressure fluid container according to the first or second aspect, the container lid 5 is used.
It is characterized in that a retaining mechanism 10 by bayonet coupling is provided between the container and the opening 2 of the container body 1. Here, the retaining means 10 by the bayonet coupling means, for example, as shown in FIGS. 1, 2, 3, and 7, the container lid 5 and the coupling partner thereof each have a plurality of latching claws and claw insertion recesses. Prepare alternately, insert one hook claw through the other claw insertion recess,
Next, by rotating the both members relative to each other, it means that one of the locking claws is prevented from coming off by the other locking claw (hereinafter the same).

According to a fourth aspect of the present invention, in the high pressure fluid container according to the first or second aspect, the container lid 5 is used.
And the opening 2 of the container body 1 with a retaining ring 11 fitted over the bayonet either between the retaining ring 11 and the container lid 5 or between the retaining ring 11 and the opening 2. It is characterized in that a retaining means 10 by coupling is provided.

According to a fifth aspect of the present invention, in the high pressure fluid container according to the third or fourth aspect, the container lid 5 is used.
Face-to-face driving means 20 for driving the container from the retracted position A to the face-to-face position B facing the opening 2 of the container body 1, and the container lid 5
A lid driving means 24 for driving the back and forth from the facing position B to the lid position C along the central axis Z of the opening, and the stopper means 1.
0 is provided with one container lid 5 and the other opening 2 or the retaining ring 11 for relative rotation, and a control means 30 for driving and controlling each of the above means 20, 24, 30. The control means 35 is configured to control the opening / closing of the container lid 5.

[0009]

According to the present invention, the following actions and effects are exhibited. (A) In the invention according to claim 1, the high-pressure fluid container comprises a container body 1, a container lid 5 for closing the opening 2 of the container body 1, an inner peripheral surface 2a of the opening 2, and the container. Since the seal ring 8 interposed between the lid 5 and the outer peripheral surface 6a of the opening fitting portion 6 and the retaining means 10 for preventing the container lid 5 from coming off from the opening 2, the high pressure fluid container is sealed. Therefore, the problem of early deterioration of the seal ring can be solved.

That is, in the present invention, the opening 2 of the container body 1
Since the fitting portion 6 of the container lid 5 is fitted therein, and the container lid 5 is prevented from coming off from the opening 2 by the retaining means 10, the flanges arranged facing each other are evenly distributed over the entire circumference like the conventional example. There is no need to fasten it, and it does not take time to close the container lid 5. In addition, the inner peripheral surface 2a of the opening 2 and the container lid 5
Since the seal ring 8 interposed between the opening fitting portion 6 and the outer peripheral surface 6a is not pinched as in the conventional example,
The problem of speeding up the sealing operation and premature deterioration of the seal ring can be solved at the same time.

(B) In the invention described in claim 2, a ring groove 7 is provided in the outer peripheral surface 6a of the opening fitting portion 6 of the container lid 5, and a self-tightening seal ring 8 is provided in the ring groove 7. Since it is provided, the self-tightening seal ring 8 receives the pressure in the container and seals the gap between the opening inner peripheral surface 2a and the opening fitting portion 6. As a result, the opening can be reliably sealed.

(C) In the invention according to claim 3 or 4, between the container lid 5 and the opening 2 of the container body 1, or between the container lid 5 and the opening 2 of the container body 1. Since the retaining means 10 by bayonet coupling is provided either between the retaining ring 11 fitted over the outside and the container lid 5 or between the retaining ring 11 and the opening 2, the retaining means 10 is One container lid 5 provided and the other opening 2
Alternatively, the opening 2 can be easily opened and closed by the container lid 5 by relatively rotating the retaining ring 11. This allows
It is possible to further speed up the operation of sealing the container lid.

(D) In the invention according to the fifth aspect, since the container lid 5 is automatically opened and closed by the control means 35, the operation of sealing a particularly large high-pressure fluid container becomes easy.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 5 show a first embodiment of a high-pressure fluid container according to the present invention, FIG. 1 (A) is a cross-sectional plan view of relevant parts of the high-pressure fluid container, and FIG. 1 (B) is in FIG. 1 (A). 4 is an enlarged view of a portion of FIG. 2, FIG. 2 is a perspective view showing an opening / closing mechanism of the high pressure fluid container, FIG. 3 is a front view of the high pressure fluid container, and FIG.
Is a right side view of the high pressure fluid container, and FIG. 5 is a rear view of the high pressure fluid container.

As shown in FIGS. 1 to 5, the high-pressure fluid container includes a container body 1, a container lid 5 for closing an opening 2 of the container body 1, and an inner peripheral surface 2a of the opening 2. A seal ring 8 interposed between the container lid 5 and the outer peripheral surface 6a of the opening fitting portion 6 and a retaining ring 11 for preventing the container lid 5 from coming off from the opening 2 are provided.

As shown in FIGS. 4 and 5, the container body 1 is fixed to the container mounting table 42 provided on the base 41 by the fixing means 4.
It is fixed at 3. On the left and right side surfaces of the container body 1, there are provided viewing windows 3 for looking inside the container. In addition, a filling port 4a and a discharging port 4b for filling and discharging liquefied carbon dioxide or the like which becomes a supercritical fluid or a subcritical fluid are additionally provided on the upper side surface and the back surface of the container body 1. As shown in FIGS. 2 to 5, on the base 41, the facing drive means 20 and the lid drive means 24 for opening and closing the container lid 5, and the rotation for rotating the retaining ring 11 are performed. Means 28 are additionally arranged.

As shown in FIGS. 2 and 3, the face-to-face driving means 20 includes a swing arm 21 for horizontally swingably supporting the container lid 5, and an arm support shaft 21 for supporting the swing arm 21.
Arm support block 4 supported on the base 41 via a
4 and a rotary actuator 2 provided on the arm support block 44 for horizontally rotating the arm support shaft 21a.
2 and a pin actuator 23 for fixing the arm support shaft 21a to a predetermined position by a positioning pin 23a, and the container lid 5 faces the opening 2 of the container body 1 from the retracted position A shown in FIG. B is driven to a position B (the position indicated by a virtual line B in FIG. 1A).

As shown in FIGS. 1 (A) and 3, the lid driving means 24 is provided on the swing arm 21 and guides the container lid 5 along the central axis Z of the opening so as to be movable back and forth. A pair of left and right guide rods 25 and an actuator 27 provided on the swing arm 21 and driving the container lid 5 forward and backward.
And the output rod 28 of the actuator 27 drives the container lid 5 from the facing position B to the closed position C shown by a solid line C in FIG. In addition,
Reference numeral 26 in FIG. 1A indicates a thrust bearing that supports the guide rod 25 with high accuracy.

An opening fitting portion 6 that fits into the opening 2 is provided at the tip of the container lid 5, and the outer peripheral surface 6a of the opening fitting portion 6 is shown in FIG. 1 (B). Thus, the ring groove 7 is recessed. The ring groove 7 is a paragraph-shaped recess 7a formed on the outer periphery of the opening fitting portion 6 near the tip.
The ring plate 9 is screwed to the outer peripheral portion of the tip of the opening fitting portion 6. An arcuate guide surface 9a is formed on the outer peripheral portion of the ring plate 9 so that the opening fitting portion 6 can be smoothly fitted into the opening. By the way, the gap between the inner diameter of the opening 2 and the outer diameter of the ring plate 9 is
It is set to about 0.5 mm.

A ring-shaped self-tightening seal ring 8 is provided in the ring groove 7. The self-tightening seal ring 8 is mounted in the expanding space to prevent the seal member 8a having a U-shaped cross section that expands toward the inside of the container and the shape collapse of the seal member 8a. The seal member 8a is composed of a ring-shaped winding spring 8b, and is configured to seal the gap between the opening inner peripheral surface 2a and the opening fitting portion 6 by the pressure inside the container. As a result, the opening can be reliably sealed. Incidentally, the free outer diameter of the seal member 8a is set to be larger than the inner diameter of the opening 2 by approximately 0.4 mm.

A machine frame 45 is erected on the base 41,
As shown in FIG. 2, the retaining ring 11 is provided on the machine frame 4
5 is rotatably provided on a frame plate 46 fixed to the front surface of the frame 5. That is, the retaining ring 11 is formed by integrally forming a front ring portion 11a and a rear ring portion 11b, as shown in FIG. A ring-shaped groove 14 is formed at an intermediate portion of the retaining ring 11 in the front-rear direction.
Is attached to a mounting hole 47 (see FIG. 2) formed in the frame plate 46 to rotatably support the retaining ring 11. The mounting hole 47 is composed of a semicircular portion formed in the frame plate body 46a and a semicircular portion formed in the auxiliary plate 46b.
The retaining ring 11 is detachably supported to detachably support the retaining ring 11.

In this embodiment, the container lid 5 is detachably attached to the front ring portion 11a, and the opening 2 of the container body 1 is detachably attached to the rear ring portion 11b. The retaining means 10 includes the container lid 5 and the retaining ring 11 described above.
And the opening 2 of the container body 1 and the retaining ring 11
It is provided between and. That is, as shown in FIGS. 2 and 3, the latch claws 12 and the claw insertion recesses 13 are alternately formed on the outer peripheral surface of the container lid 5 at substantially equal angular intervals (22.5 °) to prevent the slip-out. Front ring portion 11a forming the ring 11
Corresponding to these, the claw insertion concave portions 12a and the latch claws 13a are alternately formed on the inner peripheral surface thereof at substantially equal angular intervals (22.5 °).

Further, as shown in FIG. 1 (A), on the outer peripheral surface of the container body opening portion 2, the same hooking claws 12 and claw inserting recesses (not shown) are alternately arranged at substantially equal angular intervals. The rear ring portion 11b, which is formed at (45 °) and constitutes the above-mentioned retaining ring 11, has a pawl-insertion concave portion (not shown) and a latch pawl 13b corresponding to the rear-ring portion 11b alternately arranged at substantially equal angular intervals. (45
°). As described above, the angle between the hook claw 12 and the claw insertion recess 13 is different between the front ring portion 11a and the rear ring portion 11b that form the retaining ring 11 because the container lid 5 and the retaining ring 11 are coupled with the bayonet. Therefore, even if the retaining ring 11 is rotated, the retaining ring 1
1 is intended not to drop from the opening 2 of the container body 1.

The container lid 5 is bayonet-coupled to the opening 2 of the container body 1 via the retaining ring 11. That is, as shown in FIG. 1 (A), with the opening fitting portion 6 of the container lid 5 fitted in the opening 2 of the container body 1, the retaining ring 11 is moved to a predetermined angle (1/16 in this embodiment). By rotating only), the bayonet is connected. In this combined state, the retaining claws 12 of the container lid 5 are received by the respective retaining claws 13a of the retaining ring 11, and the retaining claws 12 of the opening 2 are retained by the retaining claws 1 of the retaining ring 11.
It is accepted by 3b. By this bayonet connection, the opening 2 can be easily opened and closed by the container lid 5, and the container lid 5 does not fall off due to the high pressure in the container. Moreover, the sealing operation of the container can be further speeded up.

The rotating means 30 for rotating the retaining ring 11 is provided on the back surface of the frame plate 46, as shown in FIG. The rotating means 30 includes a pair of upper and lower air cylinders 31 that push and pull the retaining ring 11 by the predetermined angle.
a • 31b. Upper air cylinder 3
The output rod 32a of the 1a rotates the pulling arm 15a provided on the upper portion of the rear ring portion 11b by pulling it from the connection release position D shown by the solid line D to the connection position E shown by the virtual line E. Further, the lower air cylinder 31b is rotated by pushing the rotating arm 15b provided at the lower portion of the rear ring portion 11b by the output rod 32b thereof from the connection release position D shown by the broken line D to the connection position E shown by the phantom line E. To do.

That is, a pair of upper and lower air cylinders 31a
31b is configured to push and pull in opposite directions. This is because when the container is filled with high-pressure fluid, even if one output rod of the air cylinders 31a and 31b operates toward the connection release side due to a malfunction such as a power failure, the other output rod is connected. By operating to the side, the container lid 5 is intended not to accidentally fall off due to the high pressure in the container. Reference numeral 33 in FIG. 5 is a pin actuator for projecting the safety pin 33a, and 34 is a pin guide. The safety pin 33a is recessed in the retaining ring 11 at the connection release position D and the connection position E. Inadvertent rotation of the retaining ring 11 is prevented by projecting the retaining ring 11 toward.

In the present invention, the fitting portion 6 of the container lid 5 is fitted into the opening 2 of the container body 1 as described above, and the container lid 5 is inserted.
Since it is prevented from coming off by the retaining means 10, unlike the conventional example, it is not necessary to fasten the opposed flanges uniformly over the entire circumference, and it does not take time to close the container lid 5. Also, a seal ring 8 interposed between the inner peripheral surface 2a of the opening 2 and the outer peripheral surface 6a of the opening fitting portion 6 of the container lid 5.
Since no pressure is applied as in the conventional example, it is possible to solve the problems of speeding up the sealing operation and premature deterioration of the seal ring at the same time.

In the present embodiment, the facing drive means 20,
The lid driving means 24 and the rotating means 30 are configured to open and close the container lid 5 by being drive-controlled by the control means 35 shown in FIG. This control means 35
The container lid 5 is opened and closed according to a predetermined program, including a drive circuit for driving each of the means 20, 24, 30 and a CPU (none of which is shown) for outputting a drive signal to each drive circuit. Hereinafter, the procedure for closing the container lid 5 will be described with reference to FIG.

In step S1, the facing drive means 20
The arm support shaft 21a is rotated by the ON operation of the actuator 22 constituting the above, and the container lid 5 provided on the swing arm 21 is moved from the retracted position A to the facing position B facing the opening 2 of the container body 1. Let In step S2, it is determined by detecting that the container lid 5 has reached the facing position B by a proximity sensor (not shown). As a result, when the pin actuator 23 is turned on, the positioning pin 23
a is projected and the arm support shaft 21a is fixed.

In step S3, the lid driving means 24
The container lid 5 is moved from the facing position B to the lid closing position C by the ON operation of the actuator 27 constituting the above. In step S4, it is determined that the container lid 5 has reached the closed position C by detecting the proximity sensor (not shown).

In step S5, the pair of upper and lower actuators 31a and 31b constituting the rotating means 30 are turned on to rotate the retaining ring 11 from the connection release position D to the connection position E. In step S6, it is determined that the retaining ring 11 has rotated to the connecting position E by detecting that the output rod 32a of the upper actuator 31a has retracted by a predetermined stroke by each proximity sensor (not shown), and in step S7. By detecting that the output rod 32b of the lower actuator 31b protrudes by a predetermined stroke by a proximity sensor (not shown), it is determined that the retaining ring 11 has rotated to the connecting position E.

In step S8, the safety pin 33a is projected by turning on the pin actuator 33, and in step S9, it is determined by detecting the projection of the safety pin 33a by a proximity sensor (not shown). As a result, the retaining ring 11 is fixed at the connecting position E, and the container lid 5 is retained by the retaining ring 11. The opening procedure of the container lid 5 is performed by following the above steps in reverse order.

FIG. 7 shows a second embodiment of the present invention.
7A is a vertical cross-sectional view of the high-pressure fluid container, and FIG. 7B is a plan view of the high-pressure fluid container. In this embodiment, the container body 1 is fixed vertically, and the bayonet coupling preventing means 1 is provided between the container lid 5 and the opening 2 of the container body 1.
0 is provided. That is, instead of the retaining ring 11,
On the inner peripheral surface of the opening end 17 of the container body 1, a claw insertion recess 12a corresponding to the hook claw 12 and the claw insertion recess 13 of the container lid 5.
And the latch claws 13a are alternately formed at substantially equal angular intervals (45 °).

The container lid 5 is bayonet-coupled to the opening 2 of the container body 1. That is, as shown in FIG. 7 (A), with the opening fitting portion 6 of the container lid 5 fitted in the opening 2 of the container body 1, the container lid 5 is moved at a predetermined angle with respect to the container body 1 (this In the embodiment, the bayonet connection is achieved by relatively rotating only 1/8 rotation. In this combined state, the retaining claws 12 of the container lid 5 are received by the respective retaining claws 13a of the opening end portion 3 and are prevented from coming off.

Outer peripheral surface 6a of the opening fitting portion 6 of the container lid 5
As shown in FIG. 7 (A), a ring groove 7 similar to that of the first embodiment is recessed, and a ring-shaped self-tightening seal ring 8 is provided in the ring groove 7. The self-tightening seal ring 8 is a V-shaped seal member 8c that expands toward the inside of the container, and the seal member 8c is fitted into the inner peripheral surface 2a of the opening and the opening fitting by the pressure inside the container. Make sure to seal the gap with the part 6.

In the second embodiment, the output rod 28 of the closing lid driving means (not shown) is moved back and forth to drive the container lid 5 along the central axis Z of the opening from the retracted position to the closing position, and then the unillustrated rotation. By moving the container lid 5 relative to the container body 1 by moving means, the opening 2 of the container body 1
And the container lid 5 are configured to be bayonet-coupled.

The present invention is not limited to the above embodiment, but various design changes can be made as follows, for example. In the first embodiment, the rotary actuator 22 that constitutes the facing drive means 20 rotates the container lid 5 from the retracted position A shown in FIG. 2 to the facing position B facing the opening 2 of the container body 1. As illustrated, the facing drive means 20
May retract the container lid 5 upward from the facing position B.

In the first embodiment, the rotation preventing means 30 is used to rotate the retaining ring 11 to open and close the opening 2 of the container body 1 with the container lid 5.
As in the second embodiment, the container lid 5 and the container body 1 may be rotated relative to each other.

In the first embodiment, an example in which the retaining means 10 by bayonet coupling is provided between the retaining ring 11 and the container lid 5 and between the retaining ring 11 and the opening 2 has been described as an example. It does not matter as long as the retaining means 10 by bayonet coupling is provided between the retaining ring 11 and the container lid 5 or between the retaining ring 11 and the opening 2.

In the first embodiment, the front ring portion 11a and the rear ring portion 11b forming the retaining ring 11 are exemplified as one body. However, the front ring portion 11a and the rear ring portion 11b which are divided into two parts in the front and rear are formed. The retaining ring 11 can also be combined to form the retaining ring 11. The engagement mode between the retaining ring 11 and the container body 1 is not limited to the bayonet coupling.

In each of the embodiments, as the removal preventing means 10, the container lid 5 and the other side thereof are exemplified by the bayonet coupling in which a plurality of latching claws and claw insertion recesses are alternately provided, but instead of this, A male screw may be formed on the outer peripheral surface of the opening of the container body 1, a female screw may be formed inside the flange of the container lid 5, and the container lid 5 may be attached to the opening of the container body 1 with a screw.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, FIG. 1 (A) is a cross-sectional plan view of a main part of a high-pressure fluid container, and FIG. 1 (B) is FIG. 1 (A).
It is an enlarged view of the inside a part.

FIG. 2 is a perspective view of an opening / closing mechanism of the high-pressure fluid container.

FIG. 3 is a front view of the high-pressure fluid container.

FIG. 4 is a right side view of the high-pressure fluid container.

FIG. 5 is a rear view of the high-pressure fluid container.

FIG. 6 is a flowchart showing a procedure for closing the container lid.

FIG. 7 shows a second embodiment of the present invention, FIG. 7 (A) is a vertical cross-sectional view of a high-pressure fluid container, and FIG. 7 (B) is a plan view of the high-pressure fluid container.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Container main body, 2 ... Opening part of a container main body, 2a ... Inner peripheral surface of an opening part, 5 ... Container lid, 6 ... Opening fitting part of a container lid, 6a ...
Outer peripheral surface of opening fitting portion, 7 ... Ring groove, 8 ... Seal ring (self-tightening seal ring), 10 ... Stopping means, 11 ... Stopping ring, 20 ... Face-to-face driving means, 24 ... Closing drive means, 3
0 ... Rotating means, 35 ... Control means, A ... Retracted position, B ... Facing position, C ... Closed position, Z ... Opening center axis.

Continued front page    (72) Inventor Hideo Takagishi             1-3-5 Minamisenba, Chuo-ku, Osaka-shi, Osaka Prefecture               Inside I-Tech Co., Ltd. (72) Inventor Yuu Konishi             5-3-35 Takeshima, Nishiyodogawa-ku, Osaka-shi, Osaka               Osaka Boiler Manufacturing Co., Ltd. (72) Inventor Hiroshi Harada             5-3-35 Takeshima, Nishiyodogawa-ku, Osaka-shi, Osaka               Osaka Boiler Manufacturing Co., Ltd. F-term (reference) 3E084 AA02 AA12 AB01 AB10 BA02                       CA01 DA01 DB14 EA02 FA09                       FD07 GA02 GB02 GB19 HA03                       HB04 HD04                 3J040 AA17 BA03 EA15 EA17 EA42                       EA44                 3J043 AA12 BA07 DA20                 3J046 AA07 AA12 AA13 BA01 BB05                       BC07 DA04

Claims (5)

[Claims] 1. A container body (1) and the container body (1)
A container lid (5) for closing the opening (2) of the container, an inner peripheral surface (2a) of the opening (2) and an outer peripheral surface (6a) of the opening fitting portion (6) of the container lid (5). A high-pressure fluid container, comprising: a seal ring (8) interposed between the container and a retaining means (10) for retaining the container lid (5) from the opening (2). 2. The high-pressure fluid container according to claim 1, wherein a ring groove (7) is provided on the outer peripheral surface (6a) of the opening fitting portion (6), and the ring groove (7) is self-tightened. A seal ring (8) is provided, and the inner pressure of the opening (2
A high-pressure fluid container, characterized in that the gap between (a) and the opening fitting portion (6) is sealed. 3. The high-pressure fluid container according to claim 1 or 2, wherein a retaining means (10) by bayonet coupling is provided between the container lid (5) and the opening (2) of the container body (1). ) Is provided, The high pressure fluid container characterized by the above-mentioned. 4. The high-pressure fluid container according to claim 1 or 2, wherein a retaining ring (11) is fitted over the container lid (5) and the opening (2) of the container body (1). , This retaining ring (1
1) The container lid (5) or between the retaining ring (11) and the opening (2) is provided with retaining means (10) by bayonet coupling. High pressure fluid container. 5. The high-pressure fluid container according to claim 3 or 4, wherein the container lid (5) is moved from the retracted position (A) to the container body (1).
A face-to-face driving means (20) for driving to the facing position (B) facing the opening (2), and the container lid (5) from the facing position (B) to the closed position (C). Z), the lid driving means (24) for driving back and forth, one container lid (5) provided with the retaining means (10), and the other opening (2) or retaining ring (11) for relative rotation. A rotating means (30) for moving and a control means (35) for driving and controlling each of the above means (20, 24, 30) are provided, and the control means (35) controls opening and closing of the container lid (5). A high-pressure fluid container having the above structure.