WO2023136246A1 - Container and pump system - Google Patents

Abstract

Provided is a container capable of preventing gas from leaking from a cable penetration hole.　Hollow containers 3, 4 are provided above a hollow column 2 provided around a liquefied gas pump P. The center parts of the containers 3, 4 are penetrated from the bottom toward the top by a cable 8 for installing and pulling out the liquefied gas pump P. The containers 3, 4 comprise: lower plate members 5, 6 having, in center parts, cable through holes 9, 10 that can be penetrated by the cable 8; and stuffing box members 12 provided around the cable through holes 9, 10 in the center parts of the lower plate members 5, 6 and having center parts with cable insertion holes 13 through which the cable 8 is inserted. The stuffing box members 12 comprise opening diameter adjustment mechanisms 14, 20 that adjust the sizes of the opening diameters of the cable insertion holes 13.

Description

Container and pump system

The present invention relates to containers and pump systems.

Among the liquefied gas pumps, in the conventional liquefied natural gas (LNG) pump, a temporary plate was placed on the flange of the column top to prevent LNG from leaking to the outside (see, for example, Patent Document 1). ). Because LNG is heavier than air in cold regions, it was never released to the atmosphere. On the other hand, in the case of cryogenic fluids such as liquefied hydrogen and liquefied ammonia, since the gasified gas has a lighter specific gravity than air, there is a risk that liquefied hydrogen or liquefied ammonia may be released.

In the case of liquefied hydrogen pump maintenance, the boiling point of liquefied hydrogen is -253°C, whereas air (mainly oxygen and nitrogen) liquefies and solidifies in the -253°C region. When the air liquefies, liquid oxygen is produced, which is an explosive hazard, and when the air congeals, both nitrogen and oxygen can damage the pump. In addition, in the case of maintenance of the liquefied ammonia pump, if ammonia leaks out, it is toxic, which may pose a health hazard to humans.

Japanese Patent Application Laid-Open No. 2018-80801

When performing maintenance on the liquefied gas pump, pulling up the cryogenic pump, or installing the cryogenic pump, in order to prevent the intrusion of air and the release of this liquid (liquefied hydrogen, liquefied ammonia, etc.) to the outside, the liquefied gas pump should be There is a need for bulkhead chambers such as buffer containers that are mounted on columns around the perimeter to form a barrier zone, and purge containers that are mounted above the buffer containers.

The bulkhead chamber has a door to separate the inside from the atmosphere side or the tank side. There was a problem that gas leaked from the hole for use.

In the case of a liquid hydrogen pump, it is not possible to sufficiently prevent nitrogen and oxygen from entering the column, and in the case of an ammonia pump, ammonia gas leaks out to the top and outside. In addition, since the cable diameter is not uniform and fixtures such as shackles and links are attached, it is necessary to make the hole in the door larger than the cable diameter. As described above, conventionally, it has been extremely difficult to prevent gas from leaking from the hole for cable penetration.

The present invention has been made in view of the above problems, and an object thereof is to provide a container and a pump system that can prevent gas from leaking from a cable penetration hole.

A container of the present invention is a hollow container provided above a hollow column provided around a liquefied gas pump, and the liquefied gas pump is arranged in the center of the container from the bottom to the top of the container. A cable for installation and withdrawal passes through the container, and the container includes a lower plate member provided at the bottom of the container and having a cable through hole in the center through which the cable can pass; and a center portion of the lower plate member. and a stuffing box member provided around the cable through-hole and having a cable through-hole through which the cable is inserted in the center, wherein the stuffing box member has a large opening diameter of the cable through-hole. It is equipped with an opening diameter adjustment mechanism that adjusts the depth.

According to this configuration, the stuffing box member is provided around the cable through hole, and the stuffing box member is provided with an opening diameter adjusting mechanism for adjusting the size of the opening diameter of the cable insertion hole. Therefore, by adjusting the size of the opening diameter of the cable insertion hole using the opening diameter adjustment mechanism of the stuffing box member, it is possible to reduce the amount of gas leaking from the cable insertion hole.

Further, in the container of the present invention, the opening diameter adjustment mechanism is provided on a rotating ring member rotatable about the central axis of the cable insertion hole, and on the upper and lower sides of the rotating ring member, respectively. Both ends of each of a pair of upper and lower linear motion ring members slidable along the central axis of the hole and the pair of upper and lower linear motion ring members are fixed to the linear motion ring member and the rotary ring member, A driving ring member and a pair of upper and lower cloth members provided so as to cover the periphery of the rotating ring member are provided. By rotating, the sizes of the opening diameters of the pair of upper and lower cable insertion holes may be adjusted simultaneously.

According to this configuration, the rotation ring member, the pair of upper and lower direct-acting ring members, and the cloth member constitute the opening diameter adjustment mechanism, and the pair of upper and lower cloth members form the pair of upper and lower cable insertion holes. By rotating the rotating ring member, the sizes of the opening diameters of the pair of upper and lower cable insertion holes can be adjusted at the same time.

Further, in the container of the present invention, the rotary ring member may be provided with a gas inlet port for allowing purge gas to flow into the rotary ring member.

With this configuration, the purge gas can flow into the rotating ring member from the gas inlet provided in the rotating ring member. The purge gas that has flowed into the rotary ring member flows upward and downward inside the rotary ring member. As a result, even if gas tries to flow downward from above the direct-acting ring member on the upper side of the rotary ring member, the gas can be prevented from flowing in by the upwardly flowing purging gas. Further, even if gas tries to flow upward from below the direct-acting ring member on the lower side of the rotary ring member, the purge gas flowing downward can prevent the gas from flowing in.

Further, in the container of the present invention, each of the rotating ring member, the direct-acting ring member, and the cloth member may be split into two from a ring-closed state to a ring-open state.

According to this configuration, since the rotary ring member and the direct-acting ring member can be divided into two, the opening diameter adjusting mechanism can be changed from the open state to the closed state inside the container. can be attached to the cable from the middle of the Further, by opening the ring from the closed state, the opening diameter adjusting mechanism can be removed from the cable from the intermediate portion of the cable.

Further, in the container of the present invention, the opening diameter adjustment mechanism includes a ring-shaped body member having the cable insertion hole in the center, and a pair of left and right plates provided on the upper and lower sides of the body member so as to be able to be opened and closed, respectively. and a spring member that biases the pair of left and right seal members toward the central portion in a closing direction, and the cable insertion hole is formed in the central portion of the pair of left and right seal members. The size of the opening diameter of the cable insertion hole may be adjustable by moving the pair of left and right seal members in an opening direction against the elastic force of the spring member.

According to this configuration, the main body member, the seal member, and the spring member form an opening diameter adjustment mechanism, and the cable insertion hole is formed in the central portion of the pair of left and right seal members. By moving the pair of left and right seal members in the opening direction against the elastic force of the spring member, the sizes of the opening diameters of the pair of upper and lower cable insertion holes can be adjusted at the same time.

Further, in the container of the present invention, the main body member may be provided with a gas inlet for allowing purge gas to flow into the interior of the main body member.

With this configuration, the purge gas can flow into the body member from the gas inlet provided in the body member. The purge gas that has flowed into the interior of the body member flows upward and downward in the interior of the body member. Thereby, even if gas tries to flow in from the upper side of the main body member (from the top to the bottom), the gas can be prevented from flowing in by the purge gas flowing toward the top. In addition, even if gas tries to flow in from the lower side of the main body member (from the lower side to the upper side), the inflow of the gas can be prevented by the purge gas flowing toward the lower side.

Further, in the container of the present invention, the main body member may be split into two in the direction in which the pair of left and right seal members opens.

According to this configuration, since the main body member can be split into two, the opening diameter adjusting mechanism is attached to the cable from the middle portion of the cable inside the container, or the opening diameter adjusting mechanism is removed from the cable from the middle portion of the cable. be able to.

Further, the container of the present invention includes: a glove box provided inside the container and configured so that a user can insert his or her hand from the outside of the container to operate the stuffing box member; and a work window arranged near the glove box and the stuffing box member so that the stuffing box member can be viewed from the outside of the container.

According to this configuration, when performing maintenance of the liquefied gas pump, a user inserts his hand into the glove box inside the container (purge container) from the outside of the container, and uses the opening diameter adjustment mechanism of the stuffing box member to move the cable. By adjusting the size of the opening diameter of the insertion hole, it is possible to reduce the amount of gas leaking from the cable penetration hole.

A pump system of the present invention includes a liquefied gas pump and any one of the containers described above.

In this pump system, similarly to the above container, a stuffing box member is provided around the cable through hole, and the stuffing box member has an opening diameter adjusting mechanism for adjusting the size of the opening diameter of the cable insertion hole. are provided. Therefore, by adjusting the size of the opening diameter of the cable insertion hole using the opening diameter adjustment mechanism of the stuffing box member, it is possible to prevent gas from leaking from the cable insertion hole.

According to the present invention, it is possible to prevent gas from leaking from the cable penetration hole.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing (side view) which shows the pump system in embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing (perspective view) which shows the pump system in embodiment of this invention. It is an explanatory view (side view) showing a stuffing box in an embodiment of the invention. It is an explanatory view (side view) showing a stuffing box in an embodiment of the invention. It is an explanatory view (top view) showing a stuffing box in an embodiment of the invention. It is an explanatory view (top view) showing a stuffing box in an embodiment of the invention. FIG. 4 is an explanatory diagram (side view) showing how purge gas flows in according to the embodiment of the present invention; It is an explanatory view (side view) showing a stuffing box in another embodiment. It is an explanatory view (side view) showing a stuffing box in another embodiment. It is an explanatory view (plan view) showing a stuffing box in another embodiment. It is an explanatory view (plan view) showing a stuffing box in another embodiment. It is an explanatory view (side view) showing a pump system in another embodiment. It is an explanatory view (perspective view) showing a pump system in another embodiment.

A container according to an embodiment of the present invention will be described below with reference to the drawings. In the present embodiment, a case of a container used in a pump system or the like provided with a liquefied gas pump for delivering cryogenic liquefied gas such as liquefied hydrogen or liquefied ammonia will be exemplified.

A configuration of a container according to an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are explanatory diagrams showing the pump system of this embodiment. The pump system 1 comprises a liquefied gas pump P, as shown in FIGS. Here, the liquefied gas pump P of one aspect is a cryogenic liquefied gas pump, such as a liquid hydrogen pump or a liquefied ammonia pump. Further, the pump system 1 comprises a hollow column 2 provided around the liquefied gas pump P, a hollow buffer container 3 provided above the column 2, and a hollow buffer container 3 provided above the column 2 and above the buffer container 3. with a hollow purge container 4 provided. Here, the buffer container 3 and the purge container 4 are also collectively referred to as "containers". This container is hollow mounted above a hollow column 2 mounted around the liquefied gas pump P. As shown in FIG.

The buffer container 3 includes a buffer lower plate 5 that is provided on the lower surface side of the buffer container 3 and can be opened and closed upward. The purge container 4 also includes a container lower plate 6 provided on the lower surface side of the purge container 4 that can be opened and closed upward, and a container upper plate 7 that is provided on the upper surface side of the purge container 4 and can be opened and closed upward.

A cable 8 for installing and pulling out the liquefied gas pump P is passed through the center of the container from the bottom to the top of the container. The buffer lower plate 5 is provided with a cable through-hole 9 through which the cable 8 can be passed in the center, and the container lower plate 6 is provided with a cable through-hole 10 through which the cable 8 can be passed through in the center. The plate 7 is provided with a cable through-hole 11 through which the cable 8 can pass in the center. A stuffing box 12 is provided around the cable through hole 9 in the central portion of the buffer lower plate 5 . A stuffing box 12 is provided around the cable through-hole 10 in the central portion of the container lower plate 6 . A stuffing box 12 is provided around the cable through hole 11 in the central portion of the container upper plate 7 .

As shown in FIGS. 12 and 13, the container 3 includes a glove box 30 configured so that a user can insert his or her hand from outside the buffer container 12 to operate the stuffing box 12, and a glove box 30. A work window 31 arranged near 30 may be provided. The stuffing box 12 and the glove box 30 inside the buffer container 3 are visible from the outside of the buffer container 3 through the working window 31 .

Furthermore, in this pump system 1, the purge container 4 includes a glove box 32 configured so that a user can insert his hand from the outside of the purge container 4 in order to operate the stuffing box 12, and a glove box 32 near the glove box 32. is provided with a work window 33 arranged in the . The stuffing box 12 and glove box 32 of the purge container 4 are visible from the outside of the purge container 4 through the working window 33 .

In this case, when operating the opening diameter adjusting mechanism of the stuffing box 12 for maintenance of the liquefied gas pump, there is no need to open the container to put a person's hand into the container. Therefore, as in the conventional case, when a person puts his or her hand into the partition chamber (container), air may enter the barrier zone, or the liquid may leak out of the partition chamber (container). can be prevented.

In the container of the present invention, the buffer container 4 also includes a second glove box 34 configured to allow the user to insert his hands from outside the container for manual work inside the container, and a buffer container. A second work window 35 located near the second glove box 34 may be provided so that the interior of 4 can be viewed from the outside of the buffer container.

With this configuration, when performing maintenance on the liquefied gas pump, the user can insert his or her hand from the outside of the container into the second glove box 32 inside the container to perform work inside the container. In this case, when performing manual work inside the container for maintenance of the liquefied gas pump, there is no need to open the container to put a person's hand into the container. Therefore, it is possible to prevent air from entering the barrier zone and the liquid from leaking out of the container due to putting a person's hand into the container as in the conventional art. .

In the liquefied gas pump maintenance method according to the present invention, a user inserts his or her hand into the glove boxes 30, 32, and 34 provided inside the container from outside the container to adjust the opening diameter of the stuffing box 12 provided inside the container. operating the mechanism to suspend the liquefied gas pump.

According to this maintenance method, similarly to the container described above, when operating the opening diameter adjustment mechanism of the stuffing box 12 for maintenance of the liquefied gas pump, there is no need to open the container to put a person's hand into the container. . Therefore, it is possible to prevent air from entering the barrier zone and the liquid from leaking out of the container due to putting a person's hand into the container as in the conventional case.

3 to 7 are explanatory diagrams showing the stuffing box 12 of this embodiment. A cable insertion hole 13 through which the cable 8 is inserted is provided in the central portion of the stuffing box 12 . The stuffing box 12 has an opening diameter adjusting mechanism 14 for adjusting the size of the opening diameter of the cable insertion hole 13 .

As shown in FIGS. 3 and 4, the opening diameter adjusting mechanism 14 is provided with a rotating ring 15 that can rotate around the central axis of the cable insertion hole 13, and on the upper and lower sides of the rotating ring 15, respectively. A pair of linear motion rings 16 slidable along the central axis of the hole 13 are provided. Both ends of each of the pair of upper and lower linear motion rings 16 are fixed to the linear motion ring 16 and the rotary ring 15, and the pair of upper and lower cloths 17 are cylindrically formed so as to cover the periphery of the linear motion ring 16 and the rotary ring 15. is provided. A pair of upper and lower cable insertion holes 13 are formed by the pair of upper and lower cloths 17 .

As the material for the pair of upper and lower cloths 17, it is desirable to have flexibility, airtightness, and resistance to fraying and chipping of the surface at extremely low temperatures. Table 1 below shows the results of tests for confirming flexibility, airtightness, fraying, and missing surfaces at extremely low temperatures for four materials (materials A to D).

Here, as material A, para-aramid fiber "Kevlar (registered trademark)" manufactured by DuPont-Toray Co., Ltd. was used. As Material B, "Silicone Coated Heat Resistant Sheet Flameproof KW-031" manufactured by Kikuchi Sheet Industry Co., Ltd. was used. As material C, "Double-Sided Silicone-Coated Synthetic Heat-Resistant Sheet" manufactured by Kikuchi Sheet Industry Co., Ltd. was used. As material D, "cold resistant sheet for partition Achilles Frigo Soft" manufactured by Achilles Corporation was used.

The specimens of these materials A to D were immersed in liquid nitrogen, sufficiently cooled, removed from the liquid nitrogen, and twisted. Then, it was visually confirmed whether or not the flexibility of the test piece was maintained, and whether or not the surface of the test piece had defects such as chipping and fraying. In addition, a simple gas test (for example, divide the test device into two rooms for each material, fill one room with a specific gas and the other room with air, and leave it for a certain period of time) After that, it was confirmed by a test that measures how much the gas concentration in the other room increased. From the results in Table 1, it was found that it is desirable to use Material B or Material C as the material for the pair of upper and lower cloths 17 .

The rotary ring 15 is provided with a lever 18 for rotation, and by inserting a hand from the glove box and operating the lever 18 for rotation to rotate the rotary ring 15, the pair of upper and lower cable insertion holes 13 are opened. The opening diameters of the two can be adjusted at the same time. In this case, one end of the cloth 17 arranged in a cylindrical shape is rotated by a rotating lever 18, thereby twisting the cloth 17 and narrowing the diameter of the cylinder. Therefore, the cloth 17 clings to the cable 8 for installation and extraction, narrowing the gas flow path and making it possible to suppress gas leakage.

Furthermore, as shown in FIGS. 5 and 6, each of the rotary ring 15, the linear motion ring 16, and the cloth 17 can be split into two from a closed ring state to an open ring state. As a result, the stuffing box 12 can be attached and detached while the cable 8 penetrates the container. Also, by adjusting the degree of restriction according to the diameter of the cable 8, leakage can be suppressed even for cables 8 with locally different diameters.

Further, as shown in FIGS. 3 to 4 and 7, the rotary ring 15 is provided with a gas inlet 19 for introducing the purge gas into the rotary ring 15 . Nitrogen gas, helium gas, or the like, for example, is used as the purge gas. As shown in FIG. 7, the purge gas flows out from the inside of the stuffing box 12 to the top and from the inside of the stuffing box 12 to the bottom, which has the effect of impeding the flow of gas falling from the top to the bottom of the container, and , has the effect of impeding the flow of gas that would otherwise leak from the bottom to the top of the container. Therefore, it is possible to prevent highly dangerous gases such as ammonia and hydrogen from leaking to the outside and air and nitrogen from falling into the column 2 .

According to the container of this embodiment, the stuffing box 12 is provided around the cable through-holes 9, 10, 11, and the stuffing box 12 has a size of the opening diameter of the cable insertion hole 13. An opening diameter adjustment mechanism 14 for adjustment is provided. Therefore, by adjusting the size of the opening diameter of the cable insertion hole 13 using the opening diameter adjustment mechanism 14 of the stuffing box 12, it is possible to reduce the amount of gas leaking from the cable insertion hole.

In this embodiment, the rotation ring 15, the pair of upper and lower direct acting rings 16, and the cloth 17 constitute the opening diameter adjustment mechanism 14, and the pair of upper and lower cloths 17 form the pair of upper and lower cable insertion holes 13. By rotating the rotary ring 15, the sizes of the opening diameters of the pair of upper and lower cable insertion holes 13 can be adjusted at the same time.

Further, in the present embodiment, the purge gas can flow into the rotary ring 15 from the gas inlet 19 provided in the rotary ring 15 . The purge gas that has flowed into the rotary ring 15 flows upward and downward inside the rotary ring 15 . As a result, even if gas tries to flow downward from above the linear motion ring 16 on the upper side of the rotary ring 15, the gas can be prevented from flowing in by the purge gas flowing upward. Further, even if gas tries to flow upward from below the linear motion ring 16 on the lower side of the rotary ring 15, the purge gas flowing downward can prevent the gas from flowing.

Further, in this embodiment, since the rotary ring 15, the direct-acting ring 16 and the cloth 17 can be divided into two, by changing the ring from the open state to the closed state inside the container, the opening can be performed. A caliber adjustment mechanism 14 can be attached to the cable 8 at the middle of the cable 8 . Further, the opening diameter adjusting mechanism 14 can be removed from the cable 8 at the intermediate portion thereof by changing the ring from the closed state to the open state.

Further, the containers (buffer container 3 and purge container 4) of the present embodiment are provided inside the container and are configured so that a user can insert his or her hand from the outside of the container to operate the stuffing box 12. and a work window 31 arranged near the glove box and the stuffing box 12 so that the glove box 30 and the stuffing box 12 can be seen from the outside of the container.

According to this configuration, when performing maintenance of the liquefied gas pump, a user inserts his/her hand into the glove box 30 inside the container (purge container 3) from the outside of the container to operate the opening diameter adjusting mechanism 14 of the stuffing box 12. By adjusting the size of the opening diameter of the cable insertion hole 13, the amount of gas leaking from the cable insertion hole can be reduced.

Although the embodiments of the present invention have been described above by way of examples, the scope of the present invention is not limited to these, and can be changed and modified according to the purpose within the scope described in the claims. be.

(Other embodiments)
For example, FIGS. 8 to 11 show other examples of the opening diameter adjusting mechanism 20. FIG. As shown in FIGS. 8 to 11, the opening diameter adjusting mechanism 20 includes a ring-shaped main body 21 having a cable insertion hole 13 in the center, and a pair of right and left openings provided on the upper and lower sides of the main body 21 so as to be able to be opened and closed. A plate-like sealing material 22 may be provided. In this case, the cable insertion hole 13 is formed in the central portion of the pair of left and right seal members 22 , and the pair of left and right seal members 22 are urged toward the center portion in a closing direction by the elastic force of the pressing spring 23 . are being forced. The opening diameter of the cable insertion hole 13 can be adjusted by moving the pair of left and right seal members 22 in the opening direction against the elastic force of the pressing spring 23 .

In this case, as shown in FIGS. 8 and 9, the link 24 attached to the cable 8 and the seal member 22 are provided with tapered portions 25 and 26, respectively, so that the cable can be lifted only by lifting and hanging the cable 8. The size of the opening diameter of the insertion hole 13 can be changed, improving workability. Further, the main body 21 of the opening diameter adjusting mechanism 20 is provided with a gas inlet 19 for allowing purge gas to flow into the main body 21 . Further, the main body 21 of the opening diameter adjusting mechanism 20 can be split into two in the direction in which the pair of left and right sealing members 22 are opened.

According to such another embodiment as well, the main body 21, the sealing material 22, and the pressing spring 23 constitute the opening diameter adjusting mechanism 20, and the cable insertion hole 13 is formed in the central portion of the pair of left and right sealing materials 22. . By moving the pair of left and right sealing members 22 in the opening direction against the elastic force of the pressing spring 23, the sizes of the opening diameters of the pair of upper and lower cable insertion holes 13 can be adjusted at the same time.

In this case, the purge gas can flow into the main body 21 from the gas inlet 19 provided in the main body 21 . The purge gas that has flowed into the main body 21 flows upward and downward in the main body 21 . As a result, even if gas tries to flow in from the upper side of the main body 21 (from top to bottom), the gas can be prevented from flowing in by the upwardly flowing purge gas. In addition, even if gas tries to flow in from the bottom side of the main body 21 (from bottom to top), the flow of gas can be prevented by the downwardly flowing purge gas.

Also in this case, since the main body 21 of the opening diameter adjusting mechanism 20 can be divided into two, the opening diameter adjusting mechanism 20 can be attached to the cable 8 at the intermediate portion of the cable 8 inside the container, or the opening diameter adjusting mechanism Mechanism 20 can be removed from cable 8 at the middle of cable 8 .

INDUSTRIAL APPLICABILITY As described above, the container according to the present invention has the effect of preventing gas from leaking from the hole for cable penetration, and is a liquefied gas pump that delivers cryogenic liquefied gas such as liquefied hydrogen and liquefied ammonia. and is useful as a pump system or the like.

1 pump system 2 column 3 buffer container (container)
4 Purge container (container)
5 buffer lower plate (lower plate member)
6 Container lower plate (lower plate member)
7 container upper plate 8 cable 9 cable through hole 10 cable through hole 11 cable through hole 12 stuffing box (stuffing box member)
13 Cable insertion hole 14 Opening diameter adjusting mechanism 15 Rotating ring 16 Direct acting ring 17 Cloth 18 Rotation lever 19 Gas inlet 20 Opening diameter adjusting mechanism 21 Main body 22 Sealing material 23 Pressing spring 24 Link 25 Taper part 26 Taper part 30 Glove box 31 work window 32 glove box 33 work window 34 glove box 35 work window P liquefied gas pump

Claims (9)

A hollow container provided above a hollow column provided around a liquefied gas pump, wherein a cable for installing and withdrawing the liquefied gas pump extends from the bottom to the top of the container in the center of the container. is penetrated,
The container is
a lower plate member provided at the bottom of the container and having a cable through-hole in the center through which the cable can pass;
a stuffing box member provided around the cable through hole in the central portion of the lower plate member and having a cable insertion hole through which the cable is inserted in the central portion;
with
A container, wherein the stuffing box member includes an opening diameter adjusting mechanism that adjusts an opening diameter of the cable insertion hole. The opening diameter adjustment mechanism is
a rotating ring member rotatable around the central axis of the cable insertion hole;
a pair of upper and lower direct-acting ring members provided respectively on the upper side and the lower side of the rotating ring member and slidable along the central axis of the cable insertion hole;
Both ends of each of the pair of upper and lower linear motion ring members are fixed to the linear motion ring member and the rotary ring member, and a pair of upper and lower parts are provided so as to cover the periphery of the linear motion ring member and the rotary ring member. a cloth member;
with
The pair of upper and lower cable insertion holes are formed by the pair of upper and lower cloth members,
2. The container according to claim 1, wherein the opening diameters of said pair of upper and lower cable insertion holes can be simultaneously adjusted by rotating said rotating ring member. The container according to claim 2, wherein the rotary ring member is provided with a gas inlet port for allowing purge gas to flow into the rotary ring member. The container according to claim 2 or claim 3, wherein each of the rotary ring member, the direct-acting ring member, and the cloth member can be split into two from a ring-closed state to a ring-open state. The opening diameter adjustment mechanism is
an annular main body member having the cable insertion hole in its central portion;
a pair of left and right plate-shaped sealing members provided so as to be openable and closable on the upper and lower sides of the main body member;
a spring member that biases the pair of left and right seal members in a closing direction toward the central portion;
with
The cable insertion hole is formed in the central portion of the pair of left and right sealing members,
2. The container according to claim 1, wherein the opening diameter of said cable insertion hole can be adjusted by moving said pair of left and right sealing members in an opening direction against the elastic force of said spring member. The container according to claim 5, wherein the main body member is provided with a gas inlet for allowing purge gas to flow into the interior of the main body member. The container according to claim 5 or 6, wherein the main body member can be split into two in the direction in which the pair of left and right seal members opens. a glove box provided inside the container and configured to allow a user's hand to be inserted from outside the container to operate the stuffing box member;
a work window arranged near the glove box and the stuffing box member so that the glove box and the stuffing box member can be seen from the outside of the container;
A container according to any preceding claim, comprising a a liquefied gas pump;
A container according to any one of claims 1 to 8;
A pump system comprising:

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