Gas cylinder

Abstract

The utility model provides a gas cylinder. The gas cylinder comprises an outer container, an inner container, a supporting piece, a supporting shaft and a limiting protrusion. The inner container is arranged in the outer container. The supporting piece is arranged in the outer container and opposite to the rear end of the inner container, and the supporting piece is fixedly connected with the inner circumferential wall of the outer container. A through hole is formed in the supporting piece. The supporting shaft is fixed to the rear end of the inner container, arranged in the through hole in a penetrating mode and protrudes out of the rear end face of the supporting piece, and the supporting piece is matched with the supporting shaft to achieve connection between the inner container and the outer container and supporting of the inner container. The preset distance is reserved between the rear end of the supporting shaft and the outer container, so that heat transfer between the supporting shaft and the outer container caused by direct contact between the supporting shaft and the outer container can be avoided, and the heat preservation performance of the gas cylinder is ensured. Besides, the limiting protrusions are arranged on the periphery of the supporting shaft, when the inner container and the outer container are sleeved, the limiting protrusions can abut against the supporting pieces so that the supporting shaft can be positioned, the preset distance can be kept between the rear end of the supporting shaft and the outer container, and operation is convenient and easy.

Description

TECHNICAL FIELD

[0001] The utility model relates to low temperature container technical field, especially relate to a gas cylinder. BACKGROUND

[0002] As a mobile pressure container, the gas cylinder can be used for storing compressed gas, liquefied gas and the like, and can provide continuous use of gas. The gas cylinder is mainly composed of an outer shell and an inner shell, and the inner shell is suspended in the outer shell by the support structure at the front and rear ends.

[0003] In order to meet the support strength of the inner shell of the gas cylinder and meet the 5g vibration test of type test, at present, the connection mode of the rear support structure of the inner shell is that the inner rear support rod is inserted into the support piece fixed on the outer rear head, and then the interval between the inner rear support rod and the outer rear head is controlled by lifting the inner shell to move the inner shell relative to the outer shell. Since the length of the extension of the distribution head outside the front head needs to be measured by a ruler when lifting the inner shell to determine the extension length of the rear support rod, this results in low production efficiency and cannot meet the requirements of efficient production. At the same time, since it is controlled manually, there is uncertainty, and the consistency of quality cannot be guaranteed. Once the interval is too small, it is easy to cause heat transfer between the gas cylinder support rod and the outer rear head, and frost is formed on the gas cylinder support rod and the outer rear head, which affects the evaporation rate index of the gas cylinder and causes the gas cylinder to be unable to be used normally. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a gas cylinder which can position the position of the support shaft and keep a preset distance between the rear end of the support shaft and the outer shell.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] According to one aspect of the present application, the present application provides a gas cylinder, comprising:

[0007] an outer shell;

[0008] an inner shell arranged inside the outer shell;

[0009] a support piece arranged inside the outer shell and relative to the rear end of the inner shell, the support piece is fixedly connected with the inner circumferential wall of the outer shell, and a through hole is arranged on the support piece;

[0010] a support shaft fixed to the rear end of the inner shell, the support shaft is arranged in the through hole and protrudes from the rear end surface of the support piece, and the rear end of the support shaft is spaced apart from the outer shell by a preset distance;

[0011] A limiting protrusion is arranged on the outer periphery of the supporting shaft, and is used to abut against the rear end surface of the supporting member and position the supporting shaft, so that the rear end of the supporting shaft is kept at a preset distance from the outer shell.

[0012] In some embodiments, the supporting member is provided with a groove, which is located outside the through hole and communicates with the through hole.

[0013] The limiting protrusion is adapted to the groove, so that the limiting protrusion can pass through the groove.

[0014] The supporting shaft can rotate relative to the supporting member to make the limiting protrusion misaligned with the groove, and the supporting shaft can move relative to the supporting member to make the limiting protrusion abut against the rear end surface of the supporting member.

[0015] In some embodiments, the number of limiting protrusions is multiple, and the multiple limiting protrusions are arranged at intervals in the circumferential direction on the outer periphery of the supporting shaft.

[0016] The number of grooves is multiple, and the multiple grooves are arranged one-to-one corresponding to the multiple limiting protrusions, and each groove communicates with the through hole.

[0017] In some embodiments, the multiple limiting protrusions are uniformly distributed on the supporting shaft.

[0018] In some embodiments, the supporting shaft is coaxially arranged with the inner shell.

[0019] The supporting shaft is coaxially arranged with the outer shell.

[0020] In some embodiments, the supporting member includes a supporting plate and a supporting sleeve, the supporting plate is arranged on the outer periphery of the supporting sleeve, and the outer periphery of the supporting plate is fixedly connected with the inner circumferential wall of the outer shell.

[0021] The supporting shaft is arranged through the supporting sleeve and protrudes from the rear end surface of the supporting sleeve, and the supporting shaft is rotatably and movably connected with the supporting sleeve.

[0022] In some embodiments, the gas cylinder further includes a dispensing head, which is fixed to the front end of the inner shell, and the dispensing head is arranged through the outer shell and fixedly connected with the outer shell.

[0023] In some embodiments, the front end of the outer shell is provided with a reinforcing plate, and the reinforcing plate is located outside the periphery of the dispensing head.

[0024] In some embodiments, the outer shell includes an outer cylinder segment and two outer end covers, the axial ends of the outer cylinder segment are through, and the two outer end covers are arranged at the axial ends of the outer cylinder segment to close the axial ends of the cylinder segment.

[0025] In some embodiments, the inner container is arranged with the outer container at intervals, and the inner container and the outer container enclose a sandwich space;

[0026] The sandwich space is provided with a heat insulation material, and the heat insulation material is used for heat insulation of the inner container.

[0027] From the above technical solution, the utility model has at least the following advantages and positive effects:

[0028] In the application, the support shaft fixed at the rear end of the inner container is arranged in the through hole of the support member fixed in the inner part of the outer container, that is, the support member cooperates with the support shaft to realize the connection of the inner and outer containers and can support the inner container. Moreover, the support shaft protrudes from the rear end of the support member, and the rear end of the support shaft is spaced apart from the outer container by a preset distance, thereby avoiding the direct contact between the support shaft and the outer container, the heat transfer between the support shaft and the outer container, the frost formation of the support shaft and the outer container, the influence on the evaporation rate index of the gas cylinder, and the normal use of the gas cylinder, so as to improve the overall heat preservation performance of the gas cylinder.

[0029] Moreover, since the limiting protrusion is arranged on the support shaft, the limiting protrusion can abut against the rear end face of the support member, so that the position of the support shaft can be positioned when the inner container and the outer container are sleeved, that is, only the limiting protrusion is abutted against the rear end face of the support member, and the rear end of the support shaft can be kept apart from the outer container by a preset distance, without the need for repeatedly measuring the distance between the rear end of the support shaft and the outer container by artificial means, so as to eliminate the uncertainty caused by artificial control, thereby facilitating the consistency of the quality of the gas cylinder during production, and simplifying the operation and improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of the gas cylinder in the embodiment.

[0031] Figure 2 is Figure 1 an enlarged structural schematic view of position A in the embodiment.

[0032] Figure 3 is a structural schematic view of the support sleeve in the embodiment.

[0033] Figure 4 is Figure 3 a sectional view along direction B-B in the embodiment.

[0034] Figure 5 is a distribution structural schematic view of the support shaft and the limiting protrusion in the embodiment.

[0035] Figure 6 is Figure 5 a sectional view along direction C-C in the embodiment.

[0036] The reference signs are explained as follows:

[0037] 1, outer shell; 11, outer cylinder section; 12, front outer head; 13, rear outer head; 2, inner shell; 3, support member; 31, support plate; 32, support sleeve; 321, support portion; 322, limiting portion; 33, through hole; 34, groove; 35, reinforcing plate; 4, support shaft; 5, limiting protrusion; 6, interlayer space; 7, thermal insulation material; 8, dispensing head; 9, reinforcing plate. DETAILED DESCRIPTION

[0038] The typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various changes in different embodiments, which do not deviate from the scope of the present application, and the description and drawings in essence are used for description, not for limiting the present application.

[0039] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indication of direction or position relationship (such as up, down, left, right, front and back, etc.) is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation. When these elements are in the position shown in the drawings, these descriptions are appropriate. If the position of these elements changes, the indication of direction also changes accordingly.

[0040] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0041] The present application provides a gas cylinder for storing medium. Specifically, the medium can be compressed gas, liquefied gas, etc.

[0042] The specific embodiments of the gas cylinder of the present application are described in detail below with reference to the drawings.

[0043] Figure 1 The structure of the gas cylinder in the present embodiment is shown in the following schematic diagram, Figure 2 is Figure 1 the enlarged structure schematic diagram at A in the above figure.

[0044] Reference Figure 1 and Figure 2The gas cylinder comprises an outer shell 1, an inner shell 2, a support 3, a support shaft 4 and a limiting protrusion 5. The inner shell 2 is arranged inside the outer shell 1. The support 3 is arranged inside the outer shell 1 and is arranged opposite to the rear end of the inner shell 2. The support 3 is fixedly connected to the inner circumferential wall of the outer shell 1. The support 3 is provided with a through hole 33. The support shaft 4 is fixed to the rear end of the inner shell 2. The support shaft 4 is arranged in the through hole 33 and protrudes from the rear end surface of the support 3. The rear end of the support shaft 4 is spaced apart from the outer shell 1 by a preset distance. The limiting protrusion 5 is arranged on the outer periphery of the support shaft 4. The limiting protrusion 5 is used to abut against the rear end surface of the support 3 and position the support shaft 4, so that the rear end of the support shaft 4 is kept spaced apart from the outer shell 1 by a preset distance.

[0045] In the present application, the support shaft 4 fixed to the rear end of the inner shell 2 is arranged in the through hole 33 of the support 3 fixed inside the outer shell 1. That is, the support 3 cooperates with the support shaft 4 to realize the connection between the inner shell 2 and the outer shell 1, and can support the inner shell 2. Moreover, the support shaft 4 protrudes from the rear end of the support 3, and the rear end of the support shaft 4 is spaced apart from the outer shell 1 by a preset distance, thereby avoiding the direct contact between the support shaft 4 and the outer shell 1, the heat transfer between the support shaft 4 and the outer shell 1, the frosting of the support shaft 4 and the outer shell 1, the influence on the evaporation rate of the gas cylinder, and the normal use of the gas cylinder, so as to improve the overall heat preservation performance of the gas cylinder.

[0046] Moreover, the limiting protrusion 5 is arranged on the support shaft 4. The limiting protrusion 5 can abut against the rear end surface of the support 3, so that the position of the support shaft 4 can be positioned when the inner shell 2 and the outer shell 1 are sleeved. That is, the rear end of the support shaft 4 can be kept spaced apart from the outer shell 1 by a preset distance only by making the limiting protrusion 5 abut against the rear end surface of the support 3. The distance between the rear end of the support shaft 4 and the outer shell 1 does not need to be repeatedly measured by manual operation, so that the uncertainty caused by manual control is eliminated. This can ensure the consistency of the quality of the gas cylinder during production, and the above design simplifies the operation and improves the production efficiency.

[0047] Reference Figure 1 The outer shell 1 is hollow inside. The outer shell 1 comprises an outer cylinder section 11 and two outer heads. The outer cylinder section 11 is in a cylindrical shape, and the axial ends thereof are through. The two outer heads are arranged at the axial ends of the outer cylinder section 11 and are fixedly connected to the outer cylinder section 11, respectively, to respectively close the axial openings of the outer cylinder section 11.

[0048] For the convenience of description, it is defined that the axial direction of the outer shell 1 is the front-rear direction.

[0049] The two outer heads are a front outer head 12 and a rear outer head 13, respectively. The front outer head 12 is provided with a through hole. Specifically, the through hole is located in the middle of the front outer head 12, and the axis of the through hole is on the same straight line as the axis of the outer shell 1.

[0050] In the embodiment, the outer head can be hemispherical or dish-shaped, and the convex surface faces away from the outer cylinder segment 11.

[0051] The inner container 2 is arranged inside the outer container 1 and is used to contain medium such as compressed gas or liquefied gas. Specifically, the inner container 2 is arranged between the inner and outer walls of the outer container 1. The space between the inner container 2 and the outer container 1 forms a sandwich space 6. The sandwich space 6 is a vacuum space, which can significantly reduce the heat conduction between the inner container 2 and the outer container 1, reduce the heat convection in the sandwich space 6, and thus improve the heat preservation effect of the gas cylinder.

[0052] The sandwich space 6 is provided with a heat insulation material 7, which is used for heat insulation of the inner container 2. This can further reduce the heat conduction between the inner container 2 and the outer container 1, and improve the heat preservation effect of the gas cylinder.

[0053] In the embodiment, the inner container 2 and the outer container 1 are coaxially arranged, so that the sandwich space 6 is uniformly distributed around the outer periphery of the inner container 2, to ensure the heat insulation effect of the sandwich space 6 on the inner container 2 in the circumferential direction.

[0054] In the embodiment, the inner container 2 includes an inner cylinder segment and two inner heads. The specific structure of the inner container 2 is described above with reference to the structure of the outer container 1, and will not be described here.

[0055] Referring to Figure 1 and Figure 2 , the support 3 is arranged inside the outer container 1 and relative to the rear end of the inner container 2. The support 3 is fixedly connected to the inner circumferential wall of the outer container 1. Specifically, the support 3 is fixed to the inner side of the rear outer head 13.

[0056] The support 3 is provided with a through hole 33. The axis of the through hole 33 is on the same line as the axis of the outer container 1.

[0057] The support 3 is also provided with a groove 34, which is located outside the through hole 33 and communicates with the through hole 33. The number of grooves 34 can be multiple, and the multiple grooves 34 are circumferentially spaced around the outer periphery of the through hole 33 and communicate with the through hole 33. In other embodiments, the number of grooves 34 can be only one.

[0058] In the embodiment, the support 3 can include a support plate 31 and a support sleeve 32. The support plate 31 is arranged on the outer periphery of the support sleeve 32, and the outer periphery of the support plate 31 is fixedly connected to the inner circumferential wall of the outer container 1.

[0059] The middle part of the support plate 31 is provided with a through hole. The axis of the through hole is on the same line as the axis of the outer container 1, so that the support sleeve 32 can be coaxially arranged with the outer container 1.

[0060] The outer periphery of the support plate 31 is fixedly connected with the rear outer head 13. The support plate 31 is plate-shaped. Since the rear outer head 13 has a convex surface, a gap is formed between the rear end surface of the support plate 31 and the end of the rear outer head 13.

[0061] Figure 3 FIG. 4 is a structural schematic view of the support sleeve 32 in the embodiment, Figure 4 FIG. 5 is a structural schematic view of the support sleeve 32 in the embodiment, Figure 3 FIG. 6 is a sectional view along the direction B-B of the support sleeve 32 in the embodiment.

[0062] Referring to FIGS. 1 and 2, Figure 2-4 The support sleeve 32 is arranged in the through hole, and the front and rear ends of the support sleeve 32 protrude out of the support plate 31. At this time, the rear end of the support sleeve 32 protrudes out of the rear end surface of the support plate 31 and has a gap with the rear outer head 13. The through hole 33 and the groove 34 are arranged on the support sleeve 32.

[0063] Specifically, the support sleeve 32 includes a support portion 321 and a limiting portion 322 which are connected in the axial direction. The support portion 321 is arranged in the through hole, and the outer periphery of the support portion 321 is fixedly connected with the support plate 31. The limiting portion 322 is located at the front end of the support portion 321. The outer diameter of the limiting portion 322 is greater than the outer diameter of the support portion 321, and the outer diameter of the limiting portion 322 is greater than the outer diameter of the through hole. This makes the support portion 321, when arranged in the through hole, abut against the support plate 31 through the limiting portion 322, so as to limit the displacement of the support portion 321 in the axial direction. Optionally, the limiting portion 322 is fixedly connected with the support plate 31, so as to improve the connection strength between the support sleeve 32 and the support plate 31, and improve the support stability of the support member 3 as a whole.

[0064] In the embodiment, the support member 3 can further include a reinforcing plate 35. The reinforcing plate 35 is fixed to the rear end surface of the support plate 31, and the reinforcing plate 35 is located at the outer periphery of the support sleeve 32. The reinforcing plate 35 is used to reinforce the structural strength of the support member 3.

[0065] Referring to FIGS. 1 and 2, Figure 1 and Figure 2 The support shaft 4 is fixed to the rear end of the inner container 2, and the support shaft 4 is arranged in the through hole 33 of the support member 3 and protrudes out of the rear end surface of the support member 3. The support shaft 4 cooperates with the support member 3 to realize the connection between the inner container 2 and the outer container 1, to position the inner container 2 relative to the outer container 1, and to support the inner container 2. Specifically, the support shaft 4 is arranged in the through hole 33 of the support sleeve 32 and protrudes out of the rear end of the support sleeve 32. Since the front and rear ends of the support sleeve 32 protrude out of the support plate 31, the support shaft 4 has a large contact area with the support sleeve 32, so as to improve the support strength of the support shaft 4 and the stability of the inner container 2.

[0066] The support shaft 4 can rotate relative to the support 3, so that the position of the support shaft 4 in the circumferential direction can be adjusted, and the inner container 2 can also be assisted to adjust the position in the circumferential direction.

[0067] The support shaft 4 can move relative to the support 3, so that the support shaft 4 can pass through the support 3 and protrude backward from the support 3, and the above design can assist the movement of the inner container 2 when adjusting the position of the inner container 2 in the front-back direction.

[0068] Specifically, the support shaft 4 is in a cylindrical shape, and the outer diameter of the support shaft 4 is less than or equal to the inner diameter of the through hole 33, so that when the support shaft 4 is arranged in the through hole 33, the rotatable connection and the movable connection between the support shaft 4 and the support sleeve 32 can be realized, so that the support shaft 4 can rotate and move relative to the support sleeve 32.

[0069] In the embodiment, the support shaft 4 is coaxially arranged with the inner container 2, and since the through hole 33 is coaxial with the outer container 1, the support shaft 4 arranged on the support 3 is also coaxial with the outer container 1, so that the stress of the inner container 2 in the circumferential direction can be uniformly ensured, so as to improve the stability of the gas cylinder structure. At the same time, the above design can also ensure that the spacing between the inner container 2 and the outer container 1 in the circumferential direction is uniformly distributed, that is, the interlayer space 6 is uniformly distributed between the inner container 2 and the outer container 1.

[0070] The rear end of the support shaft 4 is spaced apart from the outer container 1 by a predetermined distance, so that the heat transfer between the support shaft 4 and the outer container 1 caused by the direct contact between the support shaft 4 and the outer container 1 can be avoided, and the frost formation between the support shaft 4 and the outer container 1 can be avoided, which affects the evaporation rate index of the gas cylinder and causes the gas cylinder to be unable to be normally used, so as to improve the overall heat preservation performance of the gas cylinder.

[0071] Figure 5 The distribution structure of the support shaft and the limiting protrusion in the embodiment is shown in the following figure, Figure 6 is Figure 5 is a sectional view along the direction C-C.

[0072] Referring to Figure 2 , Figure 5 and Figure 6 , the limiting protrusion 5 is arranged on the outer periphery of the support shaft 4, and the limiting protrusion 5 is used to abut against the rear end surface of the support 3 and position the support shaft 4, so that the position of the support shaft 4 can be positioned when the inner container 2 and the outer container 1 are sleeved, that is, only when the limiting protrusion 5 abuts against the rear end surface of the support 3, the rear end of the support shaft 4 can be kept apart from the outer container 1 by a predetermined distance, without the need for repeatedly measuring the distance between the rear end of the support shaft 4 and the outer container 1 by manual operation, so as to eliminate the uncertainty caused by manual control, so as to facilitate the consistency of the quality of the gas cylinder during production, and the above design simplifies the operation and improves the production efficiency.

[0073] The limiting protrusion 5 can be integrally formed with the support shaft 4, or can be fixed to the support shaft 4 by welding or other means.

[0074] It should be noted that the position of the limiting protrusion 5 in the axial direction of the support shaft 4 can be set according to the preset distance between the rear end of the support shaft 4 and the outer shell 1 required by the gas cylinder.

[0075] In this embodiment, the limiting protrusion 5 is adapted to the groove 34, so that the limiting protrusion 5 can pass through the groove 34.

[0076] Specifically, the support shaft 4 is aligned with the through hole 33, and the limiting protrusion 5 is aligned with the groove 34, so that the support shaft 4 passes through the through hole 33, and the limiting protrusion 5 passes through the groove 34 and is located in the space between the rear end surface of the support 3 and the rear outer head 13. The support shaft 4 is rotated relative to the support 3 to misalign the limiting protrusion 5 with the groove 34, and then the support shaft 4 is moved relative to the support 3 to abut the limiting protrusion 5 against the rear end surface of the support 3.

[0077] In this embodiment, the number of limiting protrusions 5 can be multiple, and the multiple limiting protrusions 5 are arranged in a circumferential direction on the outer periphery of the support shaft 4. At this time, the number of grooves 34 is multiple, and the multiple limiting protrusions 5 are arranged one-to-one corresponding to the multiple grooves 34.

[0078] Specifically, the multiple limiting protrusions 5 are uniformly distributed on the support shaft 4, so that the spacing between any two adjacent limiting protrusions 5 is consistent, which can simplify the operation of aligning the multiple limiting protrusions 5 with the multiple grooves 34 one by one, and can improve the alignment efficiency.

[0079] In other embodiments, the number of limiting protrusions 5 can also be only one, and at this time, the number of grooves 34 can be multiple or only one. When the number of grooves 34 is multiple, the limiting protrusion 5 can align with any one of the grooves 34 and pass through the groove 34 from front to back.

[0080] Reference Figure 1 In this embodiment, the gas cylinder further comprises a dispensing head 8, which is fixed to the front end of the inner shell 2 and passes through the outer shell 1 and is fixedly connected with the outer shell 1. Specifically, the dispensing head 8 passes through the through hole in the front outer head 12.

[0081] The dispensing head 8 is coaxially arranged with the inner shell 2, and since the through hole is coaxial with the outer shell 1, the dispensing head 8 is coaxial with the outer shell 1. Since the support shaft 4 is coaxially arranged with the outer shell 1 and the inner shell 2, the inner shell 2 and the outer shell 1 are coaxially arranged to ensure that the interlayer space 6 between the inner shell 2 and the outer shell 1 is uniformly distributed.

[0082] The distribution head 8 is in communication with the inner container 2 and is used to communicate with external pipelines to distribute the medium stored in the inner container 2 to different external pipelines to ensure that the medium can be uniformly supplied to various points.

[0083] The front end of the outer container 1 is provided with a reinforcing plate 9, and the reinforcing plate 9 is located at the outer periphery of the distribution head 8, and the reinforcing plate 9 is used to strengthen the strength of the outer periphery of the outer container 1 at the distribution head 8. Specifically, the reinforcing plate 9 is fixed to the front end of the front outer head 12.

[0084] An exemplary assembly process of the above-mentioned gas cylinder is as follows:

[0085] The support shaft 4 is fixed in the middle of the rear end of the inner container 2, so that the support shaft 4 is coaxially arranged with the inner container 2.

[0086] The support piece 3 is fixedly connected inside the rear outer head 12 of the outer container 1 of the gas cylinder. At this time, the support piece 3 is fixed to the rear outer head 13 in the form that the limiting portion 322 of the support sleeve 32 faces forward, and the rear end portion of the support portion 321 of the support sleeve 32 has a gap with the rear outer head 13, and the axis of the through hole 33 is on the same straight line as the axis of the outer container 1. The outer container 1 is in a state of opening at the front end composed of the rear outer head 13 and the outer cylinder section 11.

[0087] According to the preset distance between the rear end of the support shaft 4 and the outer container 1 required by the gas cylinder, the limiting protrusion 5 is arranged on the support shaft 4. The limiting protrusion 5 is matched with the groove 34 on the support piece, so that the limiting protrusion 5 can pass through the groove 34. The limiting protrusion 5 can be integrally formed with the support shaft 4 in advance, or the limiting protrusion 5 can be fixed on the support shaft 4 by welding or other methods.

[0088] The inner container 2 is put into the outer container 1 from the front end opening of the outer container 1, and the support shaft 4 is aligned with the through hole 33, and the inner container 2 can be rotated to align the limiting protrusion 5 with the groove 34 one by one, and the inner container 2 is continuously moved backward to make the support shaft 4 pass through the support piece 3 and protrude out of the rear end surface of the support piece 3, so that the limiting protrusion 5 is located behind the support piece 3. Here, according to the distribution of the limiting protrusion 5, a mark can be made in advance on the front end of the inner container 2 to indicate the position of the limiting protrusion 5, so as to facilitate the alignment of the limiting protrusion 5 and the groove 34.

[0089] The outer head is welded at the front end opening of the outer container 1 to close the front end opening of the outer container 1. The outer head is provided with a through hole for the distribution head 8 fixed to the front end of the inner container to pass through.

[0090] The rotary inner container 2 is made to be misaligned with the limiting protrusion 5 and the groove 34. Then, the step S5 is performed, the inner container 2 is moved forward to make the supporting rod move in the through hole 33 until the limiting protrusion 5 abuts against the rear end surface of the supporting piece 3, that is, the positioning of the supporting shaft 4 is completed, and the rear end of the supporting shaft 4 is kept at a preset distance from the outer container 1.

[0091] The distribution head 8 and the rear outer head 12 are fixedly connected, and the assembly of the gas cylinder is completed.

[0092] It should be noted that the above description process does not represent the sequence of each step during the assembly of the gas cylinder, and the specific sequence is determined according to the actual situation, which is not limited herein.

[0093] From the above technical solution, the utility model has at least the following advantages and positive effects:

[0094] In the present application, the supporting shaft fixed at the rear end of the inner container is arranged in the through hole of the supporting piece fixed in the inner container, that is, the supporting piece cooperates with the supporting shaft to realize the connection of the inner and outer containers and can support the inner container. Moreover, the rear end of the supporting shaft protrudes from the rear end of the supporting piece, and the rear end of the supporting shaft is kept at a preset distance from the outer container, thereby avoiding the direct contact between the supporting shaft and the outer container to cause the heat transfer between the supporting shaft and the outer container, and the frost of the supporting shaft and the outer container, which affects the evaporation rate of the gas cylinder and causes the gas cylinder to be unable to be normally used, so as to improve the overall heat preservation performance of the gas cylinder.

[0095] Moreover, the limiting protrusion is arranged on the supporting shaft, and the limiting protrusion can abut against the rear end surface of the supporting piece, which facilitates the positioning of the position of the supporting shaft when the inner container and the outer container are sleeved, that is, the rear end of the supporting shaft can be kept at a preset distance from the outer container only by making the limiting protrusion abut against the rear end surface of the supporting piece, without the need of repeatedly measuring the distance between the rear end of the supporting shaft and the outer container by manual operation, thereby eliminating the uncertainty caused by human control, which facilitates the consistency of the quality of the gas cylinder during production, and the above design simplifies the operation and improves the production efficiency.

[0096] Although the utility model has been described with reference to several exemplary embodiments, it should be understood that the used terms are illustrative and exemplary, rather than limiting terms. Since the utility model can be embodied in various forms without departing from the spirit or essence of the utility model, it should be understood that the above embodiments are not limited to any of the above-described details, but should be interpreted broadly within the spirit and scope of the appended claims, and therefore all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A gas cylinder, characterized by, The gas cylinder comprises: an outer shell; an inner shell arranged inside the outer shell; a support arranged inside the outer shell and opposite to the rear end of the inner shell, the support is fixedly connected with the inner circumferential wall of the outer shell, and a through hole is arranged on the support; a support shaft fixed to the rear end of the inner shell, the support shaft is arranged in the through hole and protrudes from the rear end surface of the support, and the rear end of the support shaft is spaced apart from the outer shell by a predetermined distance; a limiting protrusion arranged on the outer periphery of the support shaft, the limiting protrusion is used for abutting against the rear end surface of the support and positioning the position of the support shaft, so that the rear end of the support shaft is kept spaced apart from the outer shell by the predetermined distance.

2. The gas cylinder of claim 1, wherein A groove is arranged on the support, and the groove is located outside the through hole and communicates with the through hole; The limiting protrusion is matched with the groove, so that the limiting protrusion can pass through the groove; The support shaft can rotate relative to the support to make the limiting protrusion and the groove misaligned, and the support shaft can move relative to the support to make the limiting protrusion abut against the rear end surface of the support.

3. The gas cylinder of claim 2, wherein The number of the limiting protrusions is multiple, and the multiple limiting protrusions are arranged on the outer periphery of the support shaft in a circumferential direction; The number of the grooves is multiple, and the multiple grooves are arranged one by one corresponding to the multiple limiting protrusions, and each groove communicates with the through hole.

4. The gas cylinder of claim 2, wherein The multiple limiting protrusions are uniformly distributed on the support shaft.

5. The gas cylinder of claim 1, wherein The support shaft is coaxially arranged with the inner shell; The support shaft is coaxially arranged with the outer shell.

6. The gas cylinder of claim 1, wherein The support comprises a support plate and a support sleeve, the support plate is arranged on the outer periphery of the support sleeve, and the outer periphery of the support plate is fixedly connected with the inner circumferential wall of the outer shell; The support shaft is arranged in the support sleeve and protrudes from the rear end surface of the support sleeve, and the support shaft is rotatably and movably connected with the support sleeve.

7. The gas cylinder of claim 1, wherein The gas cylinder further comprises a dispensing head, the dispensing head is fixed to the front end of the inner shell, the dispensing head is arranged in the outer shell and fixedly connected with the outer shell.

8. The gas cylinder of claim 7, wherein The front end of the outer shell is provided with a reinforcing plate, and the reinforcing plate is located outside the dispensing head.

9. The gas cylinder of claim 1, wherein The outer shell comprises an outer cylinder section and two outer end covers, the axial ends of the outer cylinder section are through, and the two outer end covers are arranged on the axial ends of the outer cylinder section to close the axial ends of the cylinder section.

10. The gas cylinder of claim 1, wherein The inner shell and the outer shell are arranged in a sandwich manner, and the inner shell and the outer shell form a sandwich space; The sandwich space is provided with a heat insulation material, and the heat insulation material is used for heat insulation of the inner shell.

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