Liquid delivery method

Abstract

The present invention provides a liquid delivery method and system that can suppress contamination by contaminants and other factors. [Solution] The liquid delivery method of the present disclosure is a method for delivering liquid filled in a first resin container having a pressurizing port and a liquid delivery port. The liquid delivery method comprises: housing the first container in a second container which is more rigid than the first container; pressurizing the first container by injecting gas into the first container through the pressurizing port; and delivering the liquid to the outside of the first container through the liquid delivery port.

Description

Technical Field

[0001] The present disclosure relates to a liquid feeding method.

Background Art

[0002] Patent Document 1 discloses a liquid supply and recovery device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to the device described in Patent Document 1, a tank filled with ink (liquid) is housed in a sealed pressure vessel, and a brass pipe penetrates the sealed pressure vessel and the tank. By pressurizing the inside of the sealed pressure vessel to increase the pressure inside the sealed pressure vessel and the tank above atmospheric pressure, the liquid in the tank is discharged, i.e., supplied, from the pipe. In this process, after installing the open tank in the sealed pressure vessel, the pressurization is performed. Therefore, the liquid in the tank may be exposed to external air when installed in the sealed pressure vessel and may be contaminated by contamination or the like.

[0005] An object of the present disclosure is to provide a liquid feeding method and a liquid feeding system capable of suppressing contamination by contamination or the like.

Means for Solving the Problems

[0006] The present disclosure is a liquid feeding method for feeding a liquid filled in a resin-made first container having a pressurization port and a liquid feeding port, the liquid feeding method comprising: accommodating the first container in a second container having higher rigidity than the first container; Pressurizing the first container by injecting gas into the first container through the pressurizing port, Dispense the liquid outside the first container via the liquid delivery port. The present invention provides a liquid delivery method that includes the following features.

[0007] According to the liquid delivery method of this disclosure, the inside of the first container is pressurized via the pressurizing port of the first container, and the liquid inside the first container is delivered from the liquid delivery port of the first container. In other words, the liquid is delivered by directly pressurizing the inside of the first container. For this reason, the first container is sealed during the liquid delivery process. As a result, the liquid inside the first container is not exposed to outside air and is less susceptible to contamination by contaminants. Furthermore, since the first container is made of resin, it can achieve a relatively high degree of cleanliness and is suitable for storing liquids that need to be kept clean, but it has poor pressure resistance. According to the liquid delivery method of this disclosure, since the first container is housed in a highly rigid second container, the second container suppresses deformation of the first container that may occur when the inside of the first container is pressurized. As a result, even when the inside of the first container is pressurized, the first container does not break, and the liquid can be delivered safely. [Brief explanation of the drawing]

[0008] [Figure 1] A longitudinal cross-sectional view of the liquid delivery system according to the first embodiment is shown. [Figure 2] A longitudinal cross-sectional view of the first container according to the second embodiment is shown. [Modes for carrying out the invention]

[0009] The embodiments of this disclosure will be described below with reference to the attached drawings.

[0010] [First Embodiment] Figure 1 shows a longitudinal cross-sectional view of the liquid delivery system 1 according to the first embodiment. The liquid delivery system 1 is a system for delivering liquids that need to be protected from contamination by other contaminants to an agitator or the like. Here, the vertical direction in Figure 1 is referred to as the vertical direction of the liquid delivery system 1.

[0011] The liquid delivery system 1 includes a first container 10 filled with the liquid L to be delivered, a second container 20 that houses the first container 10, a pressurizing tube 30 for injecting gas into the first container 10, and a liquid delivery tube 40 for delivering the liquid L to the outside of the first container 10. Figure 1 shows the first container 10 in a pressurized state due to the gas injected via the pressurizing tube 30.

[0012] The first container 10 in this embodiment is a substantially rectangular parallelepiped having a bottom wall 10c, four side walls 10b extending upward from the periphery of the bottom wall 10c, and a top wall 10a connected at the upper ends of the side walls 10b, and is a flexible, sealed container. In another embodiment, the shape of the first container 10 may be any shape, such as a cube or a cylinder. The shape of the first container 10 is preferably a rectangular parallelepiped or a cube so that as much of its outer wall as possible is supported by the second container 20.

[0013] The first container 10 contains a resin, specifically a polyolefin resin. Examples of the polyolefin resin include low-density polyethylene resin, linear low-density polyethylene resin, high-density polyethylene resin, or combinations thereof. In order to have high mechanical strength and excellent flexibility, it is preferable to use a mixed resin that is a combination of low-density polyethylene resin and linear low-density polyethylene resin, specifically a mixed resin in a ratio of low-density polyethylene resin to linear low-density polyethylene resin of 2:8 to 8:2. Furthermore, as the polyolefin resin, a petroleum-derived polyolefin resin may be used alone, a plant-derived polyolefin resin may be used alone, or a combination of petroleum-derived polyolefin resin and plant-derived polyolefin resin may be used. In addition, as the polyolefin resin, a petroleum-derived monomer may be used alone, a plant-derived monomer may be used alone, or a combination of petroleum-derived monomer and plant-derived monomer may be used.

[0014] To check the state of the liquid L inside, the first container 10 is preferably transparent or translucent. The first container 10 may have a single-layer structure or a multi-layer structure. If the liquid L is prone to oxidation, or if moisture absorption is undesirable for the properties of the liquid L, the first container 10 is preferably a multi-layer structure containing a barrier resin that prevents the permeation of oxygen or moisture.

[0015] To ensure the first container 10 has appropriate flexibility, the thickness of each wall 10a, 10b, and 10c of the first container 10 is 0.06 mm to 2.5 mm, preferably 0.1 mm to 2.0 mm. The internal volume of the first container 10 is 5 L to 60 L, preferably 5 L to 20 L. When the first container 10 is not filled with liquid L, it can be folded and stored on a shelf or the like. Therefore, the first container 10 of this embodiment is compact and lightweight, making it easy to handle and transport. In another embodiment, the material of the first container may be a rigid thermoplastic resin such as polyvinyl alcohol (excluding polyethylene), polyamide, or polyethylene terephthalate.

[0016] The first container 10 is formed by blow molding in a closed, clean environment. To further enhance the cleanliness of the first container 10, it is preferable that the first container 10 is sterilized with gamma rays. If the first container 10 has a multilayer structure, it may be formed by laminating the films that make up the first container 10 and heat-sealing the edges of the laminated multilayer films. The first container 10 may also be formed by vacuum forming. To enhance the cleanliness of the first container 10, blow molding is preferred as the method for forming the first container 10.

[0017] Specific examples of the first container 10 include Steriliner Plus (trademark), Rotainer (registered trademark) manufactured by Sekisui Plastics Co., Ltd., or Barron Box (registered trademark) manufactured by Koizumi Seima Co., Ltd. The first container 10 is a container having flexibility that can be easily deformed by hand strength, or in other words, a bag. In another aspect, the first container may be a volume-reducing bottle (manufactured by Sekisui Plastics Co., Ltd.) that is slightly more rigid than the above-described containers, but can be plastically deformed by hand after use of the container to reduce the internal volume of the container. By using a container having the above-described characteristics, a high level of cleanliness inside the container can be achieved, so the liquid stored inside the container is not easily contaminated by contamination or the like.

[0018] The first container 10 has a pressure port 12 for pressurizing the inside of the first container 10 and a liquid feeding port 13 for feeding the liquid L. As shown in FIG. 1, the pressure port 12 and the liquid feeding port 13 are provided adjacent to each other on the upper wall 10a of the first container 10.

[0019] The pressure tube 30 passes through the pressure port 12 and penetrates the first container 10, and the liquid feeding tube 40 passes through the liquid feeding port 13 and penetrates the first container 10. The pressure tube 30 and the liquid feeding tube 40 are in close contact with the first container 10. In other words, each port 12, 13 is blocked by each tube 30, 40. For this reason, the gas and the liquid L can move inside and outside the first container 10 only through inside each of the tubes 30, 40. That is, the gas and the liquid L cannot leak to the outside through the gap between each port 12, 13 and each tube 30, 40. Each of the tubes 30, 40 is fixed to the first container 10 by a known pressure-resistant adhesive or the like. In another aspect, each of the tubes 30, 40 may be integrally formed with the first container 10.

[0020] Each of the tubes 30, 40 is a silicone-based or elastomer-based tube. Further, each of the tubes 30, 40 is preferably subjected to sterilization treatment by gamma rays in order to increase the cleanliness inside each of the tubes 30, 40, similar to the first container 10.

[0021] One end 30a of the pressure tube 30 is located inside the first container 10. In order to prevent foaming inside the first container 10 due to gas injection, it is preferable that the one end 30a is located at a position that does not always come into contact with the liquid L during pressurization. Specifically, it is preferable that the one end 30a is located near the upper end of the first container 10, that is, near the upper wall 10a. The position of the one end 30a may be arbitrarily changed so as not to come into contact with the liquid L according to the posture of the first container 10 during liquid feeding. During pressurization, the other end 30b of the pressure tube 30 is located outside the first container 10 and is connected to the pump 2 that sends out gas into the first container 10. That is, the liquid feeding system 1 of the present embodiment may include the pump 2 as a component.

[0022] One end 40a of the liquid feeding tube 40 is located inside the first container 10. In order to prevent liquid from remaining in the first container 10, it is preferable that the one end 40a is located at a position that always comes into contact with the liquid L during liquid feeding. The one end 40a is preferably located near the lower end of the first container 10, that is, near the bottom wall 10c. In other words, it is preferable that the liquid feeding tube 40 extends further inside the first container 10 than the pressure tube 30. The one end 40a may be arbitrarily changed so as to come into contact with the liquid L according to the posture of the first container 10 during liquid feeding. During liquid feeding, the other end 40b of the liquid feeding tube 40 is located outside the first container 10 and is connected to a stirrer 3 or the like that is not a component of the liquid feeding system 1.

[0023] When the liquid feeding system 1 is not in use, the ends 30b, 40b of the tubes 30, 40 that are opposite to the ends 30a, 40a located inside the first container 10 are blocked by a coupler or the like. Thereby, the sealing property of the first container 10 is ensured, so that the liquid L inside the first container is suppressed from being contaminated by external contamination.

[0024] The second container 20 is a roughly rectangular parallelepiped container having a bottom wall 20c, four side walls 20b extending upward from the periphery of the bottom wall 20c, and a top wall 20a connected at the upper ends of the side walls 20b. The shape of the second container 20 is determined according to the shape of the first container 10. The second container 20 accommodates the first container 10 so as to surround it from all directions (up and down, left and right, front and back). When the first container 10 is pressurized, the inner surface of the second container 20 is in contact with the outer surface of the first container 10 at least partially. Here, the pressurized state of the first container 10 means that the pressure inside the first container 10 is slightly above atmospheric pressure (for example, a gauge pressure of 0.001 MPa), causing each of the walls 10a, 10b, and 10c constituting the first container 10 to be taut. Furthermore, the gap D between the outer surface of the first container 10 and the inner surface of the second container 20 when the first container 10 is pressurized is within the range of 0 mm to 10 mm. That is, if all the inner surfaces of the second container 20 are in complete contact with all the outer surfaces of the first container 10, the gap D is 0 mm. Alternatively, only a portion of one inner surface of the second container 20 may be in contact with a portion of one outer surface of the first container 10. At a predetermined first pressure slightly higher than atmospheric pressure, the inner surface of the second container 20 is not in contact with the outer surface of the first container 10, but at a second pressure higher than the first pressure, where liquid L is being pumped, the inner surface of the second container 20 may be in partial contact with the outer surface of the first container 10 due to the expansion of the first container 10.

[0025] The second container 20 has higher rigidity than the first container 10. Specifically, the second container 20 in this embodiment contains metal. More specifically, the material of the second container 20 is stainless steel. In another embodiment, the second container may be a container containing resin. For example, the second container may be made of a rigid resin, such as a polyvinyl chloride sheet, a polycarbonate sheet, an acrylic sheet, or a PET resin sheet. When the material of the second container is a rigid resin, it is preferable that the second container is permeable. When the second container is permeable, the remaining amount of liquid L in the first container 10 can be visually confirmed. When each wall 20a, 20b, 20c constituting the second container 20 is metal, a permeable observation window may be provided in any of the walls 20a, 20b, 20c. Part of each wall constituting the second container 20 may be metal, and the remaining wall may be made of a permeable rigid resin.

[0026] The second container 20 has an opening 21 through which the pressurizing tube 30 and the liquid delivery tube 40 penetrate the upper wall 20a of the second container 20. There is a gap between each tube 30, 40 and the second container 20 at the opening 21. In other words, the opening 21 is not blocked by each tube 30, 40. Therefore, the second container 20 is open. The position of the opening 21 may be changed depending on the position of each port 12, 13. Multiple openings 21 may be provided depending on the position of each port 12, 13.

[0027] In order to house the first container 10 inside the second container 20, any of the upper wall 20a, bottom wall 20c, or side wall 20b constituting the second container 20 may be detachable or openable. Furthermore, the second container 20 may be unfoldable in order to house the first container 10.

[0028] To prevent contamination of the liquid L in the first container 10, it is preferable that the gas injected from the pressurizing tube 30 be a clean gas. The clean gas may be, for example, argon, nitrogen, or dry air (air from which oil has been separated by an oil separator and subsequently cooled). The cleanliness of the clean gas is preferably such that it meets one of the following criteria based on ISO 8573-1:2010: particle grade 5, moisture grade 9, or oil grade 7. In other words, the gas is distinct from the outside air.

[0029] The liquid L used by the liquid delivery system 1 of this embodiment is a high-viscosity, high-specific-gravity liquid. Specific examples of liquid L include industrial chemicals such as liquid crystals, suspensions, coating agents, and CMP slurries, or culture media or buffer solutions used in microbial culture or regenerative medicine.

[0030] Next, a method for filling and delivering liquid L using the liquid delivery system 1 according to the first embodiment will be described.

[0031] First, the liquid L is filled into the first container 10 by a filling device connected to one of the tubes, such as the pressure tube 30, through one tube. At this time, the first container 10 is sealed because the other tube is blocked by a coupler or the like. To further facilitate filling, a vacuum pump may be connected to the other tube to create negative pressure inside the first container 10. After the liquid L has been filled, each of the tubes 30 and 40 is blocked by a coupler or the like, and the first container 10 is stored, transported, etc., in a sealed state.

[0032] In conventional technology, since no pressurizing tube or the like is directly connected to the container, the liquid is often filled while the container is open. As a result, the liquid may become contaminated by contact with the outside air during filling. As described above, in this embodiment, since the liquid L is filled while the first container 10 is sealed, the possibility of the liquid L becoming contaminated during filling can be reduced.

[0033] Next, when the liquid L is to be delivered from the first container 10, the first container 10 is placed inside the second container 20 by removing a portion of its wall. After the first container 10 is placed inside, the removed wall is reattached to the second container 20, and the second container 20 surrounds the first container 10 from all sides. The pressurizing tube 30 and the liquid delivery tube 40 remain sealed with couplers, etc., to prevent outside air from entering the first container 10. In other words, the first container 10 is sealed. At this point, the pressure inside the first container 10 is atmospheric pressure. Subsequently, the couplers, etc., of the liquid delivery tube 40 are removed, and it is quickly connected to the agitator 3, which is the destination for the liquid. The pressure inside the liquid delivery tube 40 on the agitator 3 side is also atmospheric pressure.

[0034] Similarly, the coupler and other components of the pressurizing tube 30 are removed, and it is promptly connected to the pump 2. When the pump 2 is then operated, the gas (clean gas) is injected into the first container 10 through the pressurizing tube 30. As a result, the internal pressure of the first container 10 increases, and it may expand, or deform. The increase in pressure inside the first container 10 creates a pressure difference between the pressure inside the first container 10 and the pressure inside the liquid transfer tube 40 on the agitator side. This pressure difference causes the liquid L inside the first container 10 to flow, i.e., be transferred, through the liquid transfer tube 40 to the agitator side. In order to sufficiently transfer the above-mentioned type of liquid L, it is preferable to pressurize it to a gauge pressure of 0.001 MPa or higher. This pressure can be adjusted, for example, by a regulator provided in the pump 2.

[0035] According to this liquid delivery method, the liquid L is delivered by directly pressurizing the inside of the sealed container, the first container 10. Therefore, the liquid L can be delivered without coming into contact with the outside air. In other words, the possibility of the liquid L being contaminated by contaminants can be reduced. As a result, the liquid L can be delivered in a cleaner state to the next process where an agitator 3 or the like is installed.

[0036] If the first container 10 is pressurized without the second container 20, the first container 10 will continue to expand and rupture, which may result in leakage of the liquid L inside the first container 10. Generally, the pressure inside a container when it expands due to pressurization is lower than the pressure when it does not expand due to pressurization (because some of the force from the pressurization is used to deform the container). Therefore, if the container expands too much, the pressure required to pump the liquid L increases. Consequently, expansion of the first container 10 is undesirable in terms of both the quality of the first container 10 and the pumping ability of the liquid L.

[0037] In the liquid delivery system 1 of this embodiment, the first container 10 is housed in a highly rigid second container 20, so the second container 20 supports the first container 10. That is, the expansion of the first container 10 is suppressed by the second container 20. As a result, it becomes easy to deliver the liquid L without damaging the first container 10 and at the lowest possible pressure. In order for the second container 20 of the first embodiment to safely support the first container 10, it is preferable to pressurize it at a gauge pressure of 0.5 MPa or less.

[0038] Furthermore, by setting the gap D between the outer surface of the first container 10 and the inner surface of the second container 20 to 0 mm or more and 10 mm or less when the first container 10 is pressurized, the second container 20 can suppress the expansion of the first container 10 from all directions. As a result, not only is partial expansion of the first container 10 suppressed, but it may also be possible to pump the liquid L at a lower pressure.

[0039] Furthermore, by using a clean gas injected into the first container 10, the possibility of the liquid L being contaminated with contaminants during the pressurization process can be reduced.

[0040] The liquid delivery method and liquid delivery system 1 according to the first embodiment provide the following effects.

[0041] (1) The method of liquid delivery is: A liquid delivery method for delivering liquid L filled in a resin first container 10 having a pressurizing port 12 and a liquid delivery port 13, wherein the liquid delivery method is: The first container 10 is housed in a second container 20 which has higher rigidity than the first container 10. The first container 10 is pressurized by injecting gas into the first container 10 through the pressurizing port 12. The liquid L is to be delivered to the outside of the first container 10 via the liquid delivery port 13. It is equipped with.

[0042] As a result, the inside of the first container 10 is directly pressurized and the liquid L is delivered, so the liquid L can be delivered without coming into contact with the outside air. This reduces the possibility of the liquid L being contaminated by contaminants, etc. Furthermore, since the first container 10 is housed in the highly rigid second container 20, it becomes easy to deliver the liquid L at the lowest possible pressure without damaging the first container 10.

[0043] (2) The first container 10 is a container containing a polyolefin resin.

[0044] As a result, contamination of the liquid L in the first container 10 by contaminants can be suppressed.

[0045] (3) The second container 20 is a container containing metal or a container containing resin.

[0046] As a result, the second container 20 can more safely suppress the expansion of the first container 10.

[0047] (4) When the first container 10 is pressurized, the outer surface of the first container 10 and the inner surface of the second container 20 are in contact at least partially.

[0048] As a result, the expansion of the first container 10 is suppressed, and it may become possible to pump liquid L at a lower pressure.

[0049] (5) The gap D between the outer surface of the first container 10 and the inner surface of the second container 20 when the first container 10 is pressurized is within the range of 0 mm or more and 10 mm or less.

[0050] As a result, the second container 20 can suppress the expansion of the first container 10 from all directions, which not only suppresses the partial expansion of the first container 10 but also makes it possible to pump the liquid L at a lower pressure.

[0051] (6) The inside of the first container 10 is pressurized to a gauge pressure of 0.001 MPa or more and 0.5 MPa or less.

[0052] As a result, the liquid L can be adequately delivered while the second container 20 safely supports the first container 10.

[0053] (7) The cleanliness of the gas shall meet one of the following criteria based on ISO 8573-1:2010: particle grade 5, moisture grade 9, or oil grade 7.

[0054] As a result, the possibility of the liquid L in the first container 10 being contaminated with contaminants, etc., during the pressurization process can be reduced.

[0055] (8) The liquid delivery system 1 is A first container 10 made of resin, having a pressurizing port 12 for injecting gas into the first container 10 to pressurize the inside of the first container 10, and a liquid delivery port 13 for delivering the liquid L filled inside the first container 10 to the outside of the first container 10, A second container 20 has higher rigidity than the first container 10 and contains the first container 10 inside. It is equipped with.

[0056] As a result, the inside of the first container 10 is directly pressurized and the liquid L is delivered, so the liquid L can be delivered without coming into contact with the outside air. This reduces the possibility of the liquid L being contaminated by contaminants, etc. Furthermore, since the first container 10 is housed in the highly rigid second container 20, it becomes easy to deliver the liquid L at the lowest possible pressure without damaging the first container 10.

[0057] [Second Embodiment] Next, the first container 100 according to the second embodiment will be described with reference to Figure 2. In the following, only the configurations that differ from the first embodiment will be described.

[0058] Figure 2 shows a longitudinal cross-sectional view of the first container 100 and the tubes 30, 40, and 50 connected to the first container 100 according to the second embodiment. The first container 100 has a first container body 11 into which liquid L is filled, and a sealing cap 14 connected to the first container body 11.

[0059] The first container body 11 corresponds to the first container 10 according to the first embodiment. Therefore, the shape, material, molding method, dimensions, etc. of the first container body 11 are the same as those of the first container 10 in the first embodiment, except for the cap connection portion 11a described later.

[0060] The upper wall 10a of the first container body 11 is provided with a cap connection portion 11a that connects to a sealing cap 14. The cap connection portion 11a is a cylindrical portion that protrudes upward from the upper wall 10a. The outer circumferential surface of the cap connection portion 11a is provided with a male threaded portion (not shown) for connecting to the sealing cap 14. In other words, the sealing cap 14 is connected to the first container body 11 by a screw connection. To put it another way, the sealing cap 14 is detachably attached to the first container body 11.

[0061] A first container opening 11b is provided at the upper end of the cap connection portion 11a. In other words, the upper end of the cap connection portion 11a is open. That is, in the first container 100 according to the second embodiment, when the sealing cap 14 is not connected, it is open through the first container opening 11b.

[0062] The sealing cap 14 has a cylindrical portion 14a and an upper wall 14b that closes the upper end of the cylindrical portion 14a. Inside the cylindrical portion 14a, there is a female threaded portion (not shown) that fits with the male threaded portion of the cap connection portion 11a described above. The sealing cap 14 is screw-connected to the first container body 11, thereby sealing the cylindrical portion 14a and the cap connection portion 11a. The sealing cap 14 contains a resin such as a polyolefin resin (for example, high-density polyethylene resin). The cylindrical portion 14a and the upper wall 14b may be constructed as separate parts.

[0063] The upper wall 14b of the sealing cap 14 is provided with a cylindrical pressurizing section 14c, a liquid delivery section 14d, and a sampling section 14e, respectively. The pressurizing section 14c, the liquid delivery section 14d, and the sampling section 14e extend vertically through the upper wall 14b of the sealing cap 14. The pressurizing port 12, the liquid delivery port 13, and the sampling port 15 (described later) are defined inside the pressurizing section 14c, the liquid delivery section 14d, and the sampling section 14e, respectively. The pressurizing port 12 and the liquid delivery port 13 in the second embodiment have the same functions as those shown in the first embodiment. As shown in Figure 2, the opening area of ​​the first container opening 11b is larger than the opening areas of each of the ports 12, 13, and 15.

[0064] The pressurizing section 14c and the sampling section 14e extend to the vicinity of the first container opening 11b of the cap connection section 11a. The liquid delivery section 14d extends further into the interior of the first container 100 than the pressurizing section 14c and the sampling section 14e, specifically to the vicinity of the bottom wall 10c of the first container 100.

[0065] The pressurizing section 14c, the liquid delivery section 14d, and the sampling section 14e are integrally formed with the sealing cap 14. The pressurizing section 14c, the liquid delivery section 14d, and the sampling section 14e may also contain a polyolefin-based resin (e.g., high-density polyethylene resin) similar to that of the sealing cap 14. The pressurizing section 14c, the liquid delivery section 14d, and the sampling section 14e may also contain a flexible polyolefin-based resin (e.g., low-density polyethylene resin, linear low-density polyethylene resin, etc., that are flexible).

[0066] The pressurizing tube 30, the liquid delivery tube 40, and the sampling tube 50 are connected to the pressurizing section 14c, the liquid delivery section 14d, and the sampling section 14e, respectively, in a sealed manner. Therefore, gas or liquid cannot leak from the connections between each tube 30, 40, and 50 and each section 14c, 14d, and 14e. Preferably, each tube 30, 40, and 50 is fixed to each section 14c, 14d, and 14e with a pressure-resistant adhesive or the like. In another embodiment, each tube 30, 40, and 50 may be formed integrally with each section 14c, 14d, and 14e. That is, each tube and each section constitutes the tubes of the first embodiment.

[0067] The sampling port 15 is a port for sampling liquid L in order to check the state of the liquid L (oxygen content, water content, etc.) filled in the first container body 11. The sampling port 15 may also be a port for releasing the pressurized gas inside the first container body 11 to the outside and reducing the pressure inside the first container body 11 to atmospheric pressure. That is, the gas or liquid L inside the first container body 11 can be discharged from one end of the sampling tube 50 via the sampling port 15. In another embodiment, the sampling port 15, the sampling section 14e, and the sampling tube 50 may not be provided.

[0068] As described above, in the first container 100 according to the second embodiment, a pressurizing port 12 for pressurizing the first container 100 with gas and a liquid supply port 13 for supplying liquid L are provided on a sealing cap 14 that can be attached to and removed from the first container body 11. The advantages of this configuration will be explained below.

[0069] When the liquid L is filled in a cleanroom with a high degree of cleanliness, the sealed cap 14 can be removed and the liquid L can be filled through the first container opening 11b, which has a relatively large opening area. Therefore, filling the liquid L may be easier compared to the first embodiment.

[0070] After filling with liquid L, the first container 100 can be sealed with another sealing cap that does not have ports 12, 13, and 15, i.e., no holes in the upper wall 14b. Therefore, compared to the first embodiment, the possibility of the tubes becoming unblocked and the liquid L leaking during storage or transport of the first container 100 can be eliminated. Another advantage is that sealing the container with a sealing cap using screw connections is more robust than sealing the tubes with adhesive or the like.

[0071] According to the liquid delivery method of the second embodiment, The first container 100 has a sealing cap 14 that seals the first container 100, The pressurizing port 12 and the liquid delivery port 13 are located in the sealing cap 14.

[0072] As a result, filling the first container 100 with liquid L may become easier. Furthermore, the possibility of liquid L leaking from the first container 100 after filling may be reduced.

[0073] Furthermore, the liquid delivery method and liquid delivery system described herein are not limited to the configuration of the above-described embodiment, and various modifications are possible.

[0074] The pressurizing port 12 and the liquid delivery port 13 may be provided on separate walls of the first container 10. For example, the pressurizing port 12 may be provided on the upper wall 10a to prevent foaming, and the liquid delivery port 13 may be provided on the bottom wall 10c to prevent residual liquid L.

[0075] Multiple sealing caps may be provided on the first container. In this case, one sealing cap may be provided with a pressure port, and the other sealing cap may be provided with a liquid delivery port.

[0076] The internal volume of the second container 20 may be smaller than the volume of the first container 10 when it is pressurized, so as to be able to adequately support the first container 10.

[0077] [Note] The liquid delivery method and liquid delivery system relating to this disclosure provide the following embodiments.

[0078] [Aspect 1] A liquid delivery method for delivering a liquid filled in a first resin container having a pressurizing port and a liquid delivery port, wherein the liquid delivery method is The first container is housed in a second container that is more rigid than the first container. Pressurizing the first container by injecting gas into the first container through the pressurizing port, Dispense the liquid outside the first container via the liquid delivery port. A liquid delivery method comprising:

[0079] [Aspect 2] The first container is a container containing a polyolefin resin. The liquid delivery method described in Embodiment 1.

[0080] [Aspect 3] The first container has a sealing cap that seals the first container, The pressurizing port and the liquid delivery port are provided in the sealing cap, The liquid delivery method according to embodiment 1 or 2.

[0081] [Aspect 4] The second container is a container containing metal or a container containing resin. A liquid delivery method as described in any one of embodiments 1 to 3.

[0082] [Aspect 5] When the first container is pressurized, the outer surface of the first container and the inner surface of the second container are in contact at least partially. A liquid delivery method as described in any one of embodiments 1 to 4.

[0083] [Aspect 6] When the first container is pressurized, the gap between the outer surface of the first container and the inner surface of the second container is within the range of 0 mm to 10 mm. A liquid delivery method as described in any one of embodiments 1 to 5.

[0084] [Aspect 7] The first container is pressurized to a gauge pressure of 0.001 MPa or more and 0.5 MPa or less. A liquid delivery method as described in any one of embodiments 1 to 6.

[0085] [Aspect 8] The cleanliness of the aforementioned gas meets one of the following criteria based on ISO 8573-1:2010: particle grade 5, moisture grade 9, or oil grade 7. A liquid delivery method as described in any one of embodiments 1 to 7.

[0086] [Aspect 9] A first container made of resin, having a pressurizing port for injecting gas into the first container to pressurize the inside of the first container, and a liquid delivery port for delivering the liquid filled in the first container to the outside of the first container, A second container having greater rigidity than the first container and containing the first container inside, A liquid delivery system equipped with the following features.

[0087] [Aspect 10] The first container is a container containing a polyolefin resin. The liquid delivery system described in embodiment 9.

[0088] [Aspect 11] The first container has a sealing cap that seals the first container, The pressurizing port and the liquid delivery port are provided in the sealing cap, The liquid delivery system according to embodiment 9 or 10.

[0089] [Aspect 12] The second container is a container containing metal or a container containing resin. A liquid delivery system according to any one of embodiments 9 to 11.

[0090] [Aspect 13] When the first container is pressurized, the outer surface of the first container and the inner surface of the second container are in contact at least partially. A liquid delivery system according to any one of embodiments 9 to 12.

[0091] [Aspect 14] When the first container is pressurized, the gap between the outer surface of the first container and the inner surface of the second container is within the range of 0 mm to 10 mm. The system described in any one of the embodiments 9 to 13. [Explanation of Symbols]

[0092] 1: Fluid delivery system 10, 100: 1st container 12: Pressurized port 13: Fluid delivery port 14: Sealing cap 20:Second container L:Liquid

Claims

1. A liquid delivery method for delivering a liquid filled in a first resin container having a pressurizing port and a liquid delivery port, wherein the liquid delivery method is The first container is housed in a second container that is more rigid than the first container. Pressurizing the first container by injecting gas into the first container through the pressurizing port, The liquid is to be delivered to the outside of the first container via the liquid delivery port. A liquid delivery method comprising:

2. The first container is a container containing a polyolefin resin. The liquid delivery method according to claim 1.

3. The first container has a sealing cap that seals the first container, The pressurizing port and the liquid delivery port are provided in the sealing cap, The liquid delivery method according to claim 1.

4. The second container is a container containing metal or a container containing resin. The liquid delivery method according to claim 1.

5. When the first container is pressurized, the outer surface of the first container and the inner surface of the second container are in contact at least partially. A liquid delivery method according to any one of claims 1 to 3.

6. When the first container is pressurized, the gap between the outer surface of the first container and the inner surface of the second container is within the range of 0 mm to 10 mm. A liquid delivery method according to any one of claims 1 to 3.

7. The first container is pressurized with a gauge pressure of 0.001 MPa or more and 0.5 MPa or less. A liquid delivery method according to any one of claims 1 to 3.

8. The cleanliness of the aforementioned gas meets any of the following criteria based on ISO 8573-1:2010: particle grade 5, moisture grade 9, or oil grade 7. A liquid delivery method according to any one of claims 1 to 3.

9. A first container made of resin, the first container having a pressurizing port for injecting gas into the first container to pressurize the inside of the first container, and a liquid delivery port for delivering the liquid filled in the first container to the outside of the first container, A second container having greater rigidity than the first container and containing the first container inside, A liquid delivery system equipped with the following features.

Images