Passive stirrer and gas cylinder

Abstract

The invention relates to a passive stirrer and a gas cylinder, the passive stirrer is used for stirring fluid in the gas cylinder, the passive stirrer comprises a transmission rod, an impeller and at least one group of stirring blades, the transmission rod comprises a first end; the impeller is fixedly connected with the transmission rod, and the impeller is arranged close to the first end; the stirring blade is connected with the transmission rod, and the stirring blade is arranged in the middle of the transmission rod; according to the stirrer, the impeller is driven to rotate through gas flow in the gas cylinder inflation stage, the transmission rod connected with the impeller is driven to rotate, the stirring blade assembly is driven to rotate, the stirring function is achieved, and thermal stratification in the gas cylinder is effectively avoided; meanwhile, the stirring blades can be folded, so that the stirring blades can be conveniently loaded into a gas cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of gas mixing in hydrogen storage cylinders, and in particular to a passive agitator and a gas cylinder. Background Art

[0002] As a device for storing high-pressure hydrogen, hydrogen cylinders are one of the essential key components of new energy vehicles. At present, hydrogen cylinders have developed into Type IV (plastic liner fiber winding) hydrogen cylinders. When hydrogen cylinders are installed in vehicles, they are generally placed horizontally in the vehicle. During the inflation process, as the internal pressure of the cylinder gradually increases, part of the gas in the cylinder will reach a supercritical state after a certain period of time, and the gas properties will change significantly. At the same time, the temperature rises, and the high-temperature gas density is small, rising to the upper part of the cylinder. As the gas continues to be filled into the cylinder, the newly injected gas still maintains a low temperature and a high density. It is located in the lower part of the cylinder. The heat transfer between the cold and hot gases is insufficient, resulting in thermal stratification. If the thermal stratification phenomenon exists for a long time, it will affect the subsequent inflation process, causing uneven heating inside the cylinder and damaging the cylinder structure. Usually, the agitator can force convection and uniform mixing of the gas medium, thereby destroying the thermal stratification. However, the traditional agitator has a complex structure and occupies a large volume. Due to the size limit of the cylinder mouth and the overall sealing limit of the cylinder, the traditional agitator cannot be applied to the inside of the cylinder. Summary of the invention

[0003] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a passive agitator and a gas cylinder, which specifically adopt the following technical solutions: A passive agitator is used for agitating fluid inside a gas cylinder, comprising a transmission rod, an impeller and at least one set of agitating blades. The transmission rod includes a first end; The impeller is fixedly connected to the transmission rod, and the impeller is arranged close to the first end; The stirring blade is connected to the transmission rod, and the stirring blade is arranged in the middle part of the transmission rod.

[0004] Optionally: a first sliding ring is provided on the transmission rod, the first sliding ring is sleeved on the transmission rod, a first connecting portion is provided on the stirring blade at the end, and an outer peripheral surface of the first sliding ring is hinged to the first connecting portion of the stirring blade.

[0005] Optional: A connecting rod and a second sliding ring are provided on the transmission rod, the second sliding ring is sleeved on the transmission rod, and a second connecting part located in the middle is provided on the stirring blade, one end of the connecting rod is hinged to the second connecting part, and the other end of the connecting rod is hinged to the outer peripheral surface of the second sliding ring, and the first sliding ring and the second sliding ring are moved relative / opposite to each other, so that the stirring blade is opened or folded relative to the transmission rod.

[0006] Optionally: a first sliding sleeve is sleeved on the transmission rod, and the first sliding sleeve is located on the transmission rod between the first sliding ring and the second sliding ring.

[0007] Optionally: the first sliding ring is axially fixed relative to the transmission rod, and the second sliding ring slides axially relative to the transmission rod; or the first sliding ring slides axially relative to the transmission rod, and the second sliding ring is axially fixed relative to the transmission rod.

[0008] Optionally: a second sliding sleeve is sleeved on the transmission rod, and the second sliding sleeve is located behind the stirring blade.

[0009] Optionally: a third sliding sleeve is provided on the transmission rod, and the third sliding sleeve is located in front of the stirring blade.

[0010] Optionally, the outer diameter of the stirring blade when folded is smaller than the diameter of the impeller.

[0011] The invention also discloses a gas cylinder, wherein the passive agitator as mentioned above is arranged inside the gas cylinder.

[0012] Optionally: the gas cylinder adopts a horizontally placed plastic liner fiber wrapped gas cylinder. Beneficial Effects

[0013] The technical solution of the present invention achieves the following beneficial effects: (1) The agitator of the present invention utilizes the gas flow during the gas cylinder filling stage to drive the impeller to rotate, thereby converting a portion of the kinetic energy of the gas into the kinetic energy of the impeller's own rotation, and driving the transmission rod connected to the impeller to rotate, thereby driving the stirring blade assembly to rotate, thereby realizing the stirring function. The agitator has the high-efficiency rotation of starting with filling and stopping when the gas is stopped, thereby avoiding the generation of thermal stratification inside the gas cylinder, ensuring uniform temperature inside the gas cylinder, increasing the life of the gas cylinder, and ensuring the safety of the filling process.

[0014] (2) The agitator of the present invention can change the expansion degree and expansion position of the agitator blades in the gas cylinder by adjusting the components, and is suitable for gas cylinders of different sizes to achieve efficient stirring and mixing; at the same time, after the agitator blades are folded, they can be installed into the gas cylinder through the gas cylinder mouth and stably fixed in the gas cylinder without damaging the integrity of the gas cylinder, and can ensure the sealing of the gas cylinder.

[0015] (3) The agitator of the present invention can be driven by the airflow during the inflation stage, without the need for an additional driving source such as a motor. This makes the agitator occupy a smaller overall volume and has a simple structure. It does not affect the normal use of the gas cylinder and does not occupy the installation space of the gas cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1Schematic diagram of the structure of the passive agitator when folded in an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the structure of the passive agitator when folded in an embodiment of the present invention.

[0018] Figure 3 Schematic diagram of the installation of the passive agitator in the embodiment of the present invention when it is located in the gas cylinder.

[0019] Figure 4 Schematic diagram of the structure of the valve body assembly of the gas cylinder in an embodiment of the present invention.

[0020] The specific meanings of the reference numerals in the accompanying drawings are: 1-transmission rod; 2-stirring blade; 201-first connection part; 202-second connection part; 3-impeller; 4-first sliding ring; 5-second sliding ring; 6-first sliding sleeve; 7-second sliding sleeve; 8-third sliding sleeve; 9-rotating head; 10-connecting rod; 11-first valve body; 12-second valve body; 13-air nozzle. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention. It should be pointed out that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present application.

[0022] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" or "several" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] At present, most hydrogen storage cylinders use Type IV (plastic liner fiber winding) hydrogen storage cylinders. Type IV hydrogen storage cylinders use plastic lining as the liner to seal hydrogen, and the outer surface of the plastic lining is wrapped with a composite material layer to bear pressure. Type IV hydrogen storage cylinders have a relatively small mass and lightweight potential because their liner is made of plastic, making them more suitable for passenger cars. However, when hydrogen storage cylinders are installed in vehicles, they are generally placed horizontally in the vehicle. During the inflation process, as the internal pressure of the cylinder gradually increases, part of the gas in the cylinder will reach a supercritical state after a certain period of time, the gas properties will change, and the temperature will rise. As the gas continues to be added to the cylinder, the temperature of the newly injected gas is still low, and the newly injected gas and the gas in the cylinder will be clearly stratified, and the heat cannot be fully transferred between the two, resulting in thermal stratification. Since the liner of the Type IV hydrogen storage cylinder is made of plastic, if the thermal stratification phenomenon exists for a long time, on the one hand, the gas stratification will affect the subsequent inflation process, and on the other hand, the internal heating of the cylinder will be uneven, causing damage to the cylinder structure.

[0026] Therefore, it is necessary to stir and mix the gas inside the gas cylinder so that the gas medium inside the gas cylinder is forced to convect and evenly mixed, thereby destroying the thermal stratification. However, most of the conventional agitators are active agitators, which use a separate driving device, such as a motor, through which the agitator blades can be driven to rotate to achieve the stirring function. However, the transmission agitator is too large because it includes a motor, a transmission structure, etc., and the IV type gas cylinder is integrally formed, and the overall structure must be intact. In addition, the diameter of the bottle mouth is generally small, and the conventional agitator cannot be installed inside the gas cylinder through the bottle mouth. Therefore, the embodiment of the present invention designs a small-volume foldable agitator, which abandons the driving device and uses the inflation airflow as the power (passive agitator) to drive the agitator blades to rotate, which is more suitable for stirring inside the gas cylinder.

[0027] Combination Figure 1 and Figure 2 As shown, an embodiment of the present invention specifically discloses a passive agitator for stirring the fluid inside a gas cylinder, and is particularly suitable for horizontal plastic liner fiber-wound gas cylinders. This agitator has a simple structure, is easy to install, and does not require additional external power. It completely relies on the kinetic energy of the gas in the gas cylinder to drive stirring, and is suitable for IV type gas cylinders of different sizes.

[0028] Specifically, the agitator includes a transmission rod 1, an impeller 3 and at least one group of stirring blades 2, wherein the transmission rod 1 includes a first end; the impeller 3 is fixedly connected to the transmission rod 1, and the impeller 3 is arranged near the first end. When the gas cylinder is inflated, the gas rushing in through the mouth of the gas cylinder has a certain initial velocity. The impeller 3 can convert a part of the kinetic energy of the gas into the kinetic energy of its own rotation, and transmit it to the connected transmission rod 1, driving the transmission rod 1 to rotate; the stirring blade 2 is connected to the transmission rod 1, and the stirring blade 2 is arranged in the middle of the transmission rod 1. When the transmission rod 1 rotates, it will drive the stirring blade 2 connected thereto to rotate. The stirring blade 2 can effectively stir the inside of the gas cylinder, thereby achieving uniform mixing of the fluid inside the gas cylinder. It should be noted that the agitator of this embodiment uses gas kinetic energy as stirring power, and does not require an additional power source mechanism, which greatly reduces the number of agitator parts and is more conducive to installation inside the gas cylinder.

[0029] Furthermore, when installing the agitator inside the gas cylinder in this embodiment, the agitator needs to be loaded from the mouth of the gas cylinder. To facilitate the entry of the agitator, the stirring blade 2 of the agitator needs to be folded, and kept open when stirring in the gas cylinder. Therefore, in this embodiment, a connecting component is provided on the transmission rod 1, and the connecting component can realize the functions of opening, folding and positioning the stirring blade 2 on the transmission rod 1.

[0030] Specifically, the connecting assembly in this embodiment includes a first sliding ring 4, which is sleeved on the transmission rod 1. The stirring blade 2 is provided with a first connecting portion 201 located at the end. The outer peripheral surface of the first sliding ring 4 is hinged to the first connecting portion 201 of the stirring blade 2. In this connection method, the transmission rod 1 and the stirring blade 2 can be connected only by the first sliding ring 4. When the agitator is installed in the gas cylinder, the stirring blade 2 can be manually folded and then the agitator can be installed in the gas cylinder. The stirring blade 2 can be opened in the gas cylinder by its own weight or the centrifugal force in the rotation stage to achieve stirring.

[0031] Furthermore, in this embodiment, the connection assembly may also include a connecting rod 10 and a second sliding ring 5, the second sliding ring 5 is sleeved on the transmission rod 1, and the stirring blade 2 is provided with a second connecting portion 202, wherein the installation position of the second connecting portion 202 is biased toward one end of the first connecting portion 201, and preferably, the installation position of the second connecting portion 202 is at a distance from the first connecting portion 201 equivalent to 1 / 3 of the overall length of the stirring blade. One end of the connecting rod 10 is hinged to the second connecting portion 202, and the other end of the connecting rod 10 is hinged to the outer peripheral surface of the second sliding ring 5. When the first sliding ring 4 and the second sliding ring 5 move relative to each other, the stirring blade 2 will be opened relative to the transmission rod 1, and when the first sliding ring 4 and the second sliding ring 5 move away from each other, the stirring blade 2 will be folded relative to the transmission rod 1.

[0032] In addition, the agitator of this embodiment can realize the folding of the stirring blade 2 through the relative movement of the above-mentioned two groups of sliding rings, but the opening degree of the stirring blade 2 cannot be controlled. Therefore, this embodiment is provided with a first sliding sleeve 6 on the transmission rod 1, and the first sliding sleeve 6 is located on the transmission rod 1 between the first sliding ring 4 and the second sliding ring 5. The minimum spacing between the first sliding ring 4 and the second sliding ring 5 can be limited by the first sliding sleeve 6 of a fixed length, thereby limiting the maximum opening angle of the stirring blade 2. The opening angle of the stirring blade 2 can be adjusted by replacing the first sliding sleeve 6 of different lengths. As a connection method, in this embodiment, the position of the first sliding ring 4 can be fixed, while the second sliding ring 5 slides axially relative to the transmission rod 1, the first sliding ring 4 is used to fix the position of the stirring blade 2, and the second sliding ring 5 is used to control the opening action of the stirring blade 2. When the stirring blade 2 needs to be opened, the second sliding ring 5 slides toward the first sliding ring 4 to open the stirring blade 2; as an alternative connection method, the position of the second sliding ring 5 can also be fixed, while the first sliding ring 4 slides axially relative to the transmission rod 1, the second sliding ring 5 is used to fix the position of the stirring blade 2, and the first sliding ring 4 is used to control the opening of the stirring blade 2. When the stirring blade 2 needs to be opened, the first sliding ring 4 slides toward the second sliding ring 5 to open the stirring blade 2.

[0033] It should be noted that the front and rear positions of the stirring blade 2 described in this embodiment refer to the direction of airflow when the gas in the gas cylinder is injected. The side toward the gas injection position is the front of the stirring blade 2, and the side toward the gas flow terminal is the rear of the stirring blade 2, that is, the position where the bottle mouth in the gas cylinder is located is the front, and the position where the bottle bottom is located is the rear.

[0034] As another way to fix the stirring blade, in this embodiment, a second sliding sleeve 7 is sleeved on the transmission rod 1, and the second sliding sleeve 7 is located behind the stirring blade 2. The second sliding sleeve 7 is used to limit the position of the stirring blade 2 on the transmission rod 1. This connection method is suitable for the assembly of agitators of certain special sizes. When the agitator needs to be installed inside the gas cylinder, the stirring blade 2 is connected to the transmission rod 1 through two sets of sliding rings. In order to prevent the stirring blade 2 from moving on the transmission rod 1, a second sliding sleeve 7 is set on the transmission rod 1 located between the stirring blade 2 and the bottom of the gas cylinder. The fixed length of the second sliding sleeve 7 can limit the distance between the stirring blade 2 and the bottom of the gas cylinder, and then the stirring blade 2 is limited to the middle position of the gas cylinder to maximize the stirring effect. It should be noted that when it is necessary to adjust the distance between the stirring blade and the bottom of the gas cylinder, a second sliding sleeve 7 of different sizes and lengths can be used. By replacing the second sliding sleeve 7, the position of the stirring blade 2 on the transmission rod 1 can be changed.

[0035] Furthermore, in this embodiment, a third sliding sleeve 8 is sleeved on the transmission rod 1, and the third sliding sleeve 8 is located in front of the stirring blade 2. The third sliding sleeve 8 is mainly used to open the stirring blade. When the agitator is placed inside the gas cylinder, the third sliding sleeve 8 can be manually pushed to move, and then the stirring blade is opened. In addition, the rotation of the impeller 3 is driven by the high-speed airflow during the gas cylinder inflation process. In order to ensure that the kinetic energy of the airflow is maximized and converted into the kinetic energy of the impeller 3, the third sliding sleeve 8 can limit the distance between the stirring blade 2 and the impeller 3, and combined with the length of the first sliding sleeve 6 and the second sliding sleeve 7, it can be ensured that the impeller 3 is basically located near the mouth of the gas cylinder, so that the high-speed gas entering the gas cylinder passes through the impeller 3 to the greatest extent, so that the impeller 3 rotates faster and has a higher rotation force. At the same time, the first sliding sleeve 6, the second sliding sleeve 7 and the third sliding sleeve 8 can jointly ensure that the stirring blade 2 is fixed at the position of the transmission rod 1.

[0036] It should be emphasized that the outline diameter of the stirring blade 2 in this embodiment when folded must be smaller than the diameter of the impeller 3. Since the agitator needs to be installed in a gas cylinder, the agitator extends from the bottle mouth into the bottle body during the installation stage. At this time, it is necessary to ensure that when the agitator is folded, the maximum diameter of the agitator as a whole is smaller than the diameter of the bottle mouth. When the agitator is fully extended into the interior, the agitator is opened again. It should be noted that in order to minimize the outline diameter of the stirring blade when folded, a groove is provided in the middle of the stirring blade in this embodiment. When the stirring blade is folded, the connecting rod will be partially embedded in the groove, thereby reducing the lower limit size of the outline diameter of the stirring blade when folded, so as to ensure that the agitator is stably installed in the gas cylinder.

[0037] In addition, it should be noted that the cross section of the transmission rod 1 in this embodiment is a regular polygon, such as a regular triangle, a regular pentagon, etc., and the corresponding other components connected to the transmission rod 1 also use regular polygonal connection holes, such as the first sliding sleeve 6, the second sliding sleeve 7, the third sliding sleeve 8, the first sliding ring 4, and the middle connection holes of the second sliding ring 5 are all regular polygons. The above structure can ensure that the transmission rod 1 and other connected components are fixed in the circumferential direction.

[0038] Furthermore, in this embodiment, a set of rotating heads 9 are respectively provided at both ends of the transmission rod 1, and a circle of protrusions is provided on the outer circumference of each set of rotating heads 9. The rotating heads 9 are used to fix the transmission rod 1 of the agitator in the gas cylinder to prevent the transmission rod 1 from moving in the axial direction.

[0039] Furthermore, the passive agitator is used inside a gas cylinder, such as Figure 3 In this embodiment, valve assemblies are provided at both ends of the gas cylinder, such as Figure 4 As shown, the valve assembly includes a first valve body 12 and a second valve body 11; wherein the second valve body 11 is fixedly connected to the filling port of the gas cylinder, and the first valve body 12 is threadedly connected to the second valve body 11. When the agitator is installed in the gas cylinder, the agitator extends into the cylinder through the through hole of the second valve body 11, and then the first valve body 12 is connected to the second valve body 11. Secondly, a mounting hole is provided in the middle of the first valve body 12, and the mounting hole is used to connect the rotating head 9. When the transmission rod 1 is connected to the gas cylinder, the protrusion of the rotating head 9 abuts against the edge of the mounting hole, thereby ensuring that the transmission rod 1 does not move in the axial direction; further, in this embodiment, at least one fluid channel is provided in the first valve body 12, and the fluid channel is distributed around the mounting hole. The fluid channel is used to control the gas inlet or outlet. The fluid channel is connected to a gas nozzle 13, and the gas nozzle 13 guides the injected gas to the impeller 3. At the same time, the gas cylinder can ensure that the agitator is fixed inside the gas cylinder through the valve assembly, and the sealing inside the gas cylinder can also be ensured.

[0040] In addition, as the length of the gas cylinder increases, multiple sets of stirring blades 2 and corresponding sliding sleeves can be added as appropriate, for example, in combination with Figure 3 As shown, the stirring blade 2, the first sliding ring 4, the second sliding ring 5 and the first sliding sleeve 6 can constitute a stirring unit, and the inside of a long gas cylinder can be stirred by distributing a plurality of stirring units along the axial direction on the transmission rod 1. Furthermore, the second sliding sleeve 7 or the third sliding sleeve 8 can also be used to limit the spacing between adjacent stirring units, so that the stirring units are evenly distributed in the gas cylinder, thereby improving the stirring efficiency.

[0041] The specific operation process of the passive agitator of the embodiment of the present invention is as follows: First, remove the first valve of the gas cylinder, move the first sliding ring 4 and the second sliding ring 5 in the passive agitator away from each other, and fold the stirring blade 2. Then, extend the folded passive agitator into the gas cylinder from the middle of the second valve body 11.

[0042] Secondly, assemble the rotating head 9 at one end of the transmission rod 1 in the passive agitator with the valve assembly at the bottom of the bottle, and move the first sliding ring 4 and the second sliding ring 5 in the passive agitator relative to each other, for example, push the second sliding sleeve 7 or the third sliding sleeve 8, so that the stirring blade 2 of the passive agitator is expanded to a specified degree at a specified position in the gas cylinder.

[0043] The first valve body 12 of the gas cylinder mouth is connected to the rotating head 9 at the other end of the transmission rod 1 again, so that the passive agitator is located on the central axis of the gas cylinder.

[0044] Finally, adjust the position of the gas cylinder valve assembly to ensure that the gas cylinder body does not leak, and at the same time make the raised part of the rotating head 9 of the transmission rod 1 stuck in a suitable position to fix the entire passive agitator.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A passive agitator for stirring fluid inside a gas cylinder, characterized in that: It includes a transmission rod, an impeller and at least one set of stirring blades. The transmission rod includes a first end; The impeller is fixedly connected to the transmission rod, and the impeller is arranged close to the first end; The stirring blade is connected to the transmission rod, and the stirring blade is arranged in the middle part of the transmission rod.

2. The passive stirrer according to claim 1, characterized in that: The transmission rod is provided with a first sliding ring, which is sleeved on the transmission rod. The stirring blade is provided with a first connecting portion at the end, and the outer peripheral surface of the first sliding ring is hinged to the first connecting portion of the stirring blade.

3. The passive stirrer according to claim 2, characterized in that: The transmission rod is provided with a connecting rod and a second sliding ring, the second sliding ring is sleeved on the transmission rod, the stirring blade is provided with a second connecting portion, one end of the connecting rod is hinged to the second connecting portion, and the other end of the connecting rod is hinged to the outer peripheral surface of the second sliding ring, and the first sliding ring and the second sliding ring are moved relative / opposite to each other, so that the stirring blade is opened or folded relative to the transmission rod.

4. The passive stirrer according to claim 3, characterized in that: The transmission rod is sleeved with a first sliding sleeve, and the first sliding sleeve is located on the transmission rod between the first sliding ring and the second sliding ring.

5. The passive stirrer according to claim 3, characterized in that: The first sliding ring is axially fixed relative to the transmission rod, and the second sliding ring slides axially relative to the transmission rod; or the first sliding ring slides axially relative to the transmission rod, and the second sliding ring is axially fixed relative to the transmission rod.

6. The passive stirrer according to claim 4, characterized in that: The transmission rod is sleeved with a second sliding sleeve, and the second sliding sleeve is located behind the stirring blade.

7. The passive stirrer according to claim 6, characterized in that: The transmission rod is sleeved with a third sliding sleeve, and the third sliding sleeve is located in front of the stirring blade.

8. The passive stirrer according to claim 2 or 3, characterized in that: The outer diameter of the stirring blade when folded is smaller than the diameter of the impeller.

9. A gas cylinder, characterized in that: The gas cylinder is provided with a passive agitator as described in any one of claims 1-8.

10. The gas cylinder according to claim 9, characterized in that The gas cylinder adopts a horizontally placed plastic liner fiber wound gas cylinder.

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