Gas storage device and connecting mechanism thereof

Abstract

The invention discloses a gas storage device and a connecting mechanism thereof. The connecting mechanism comprises a valve body, an assembly part and a connecting pipe. And the valve body is provided with an abutting end part and an installing and connecting part, the abutting end part is formed at one end part of the installing and connecting part, the abutting end part forms a second abutting wall, and the valve body forms an exhaust channel. The connecting pipe comprises a connecting part and an inserting part, one end of the connecting part extends in the axis direction to form the inserting part, the inserting part and one end of the valve body are both assembled with the assembling part, and the inserting part and the valve body are both made of metal materials with preset strength. A first abutting wall is formed at the end, away from the connecting part, of the inserting part, when the connecting pipe and the valve body are assembled through the assembly part, the second abutting wall and the first abutting wall abut against each other and apply pressure, the second abutting wall or / and the first abutting wall plastically deform, and the second abutting wall and the first abutting wall abut against each other and apply pressure to the second abutting wall or / and the first abutting wall. And the connecting pipe and the valve body are in surface sealing.

Description

Technical Field

[0001] The invention relates to the technical field of gas storage cylinders, and in particular to a gas storage device and a connecting mechanism thereof. Background Art

[0002] Hydrogen energy fuel cell is a type of fuel cell. It is a chemical device that uses the chemical reaction between hydrogen and oxygen to generate electricity and water. Because it has little pollution to the environment, it is widely used in new energy vehicles.

[0003] At present, in the production of hydrogen energy fuel cells, the gas cylinder is pre-sealed and connected to the connecting pipe with a sealing ring, and the high-pressure hydrogen stored in the gas cylinder is introduced into the battery pack with the help of the connecting pipe. Since the hydrogen filling rate of the battery pack is related to the pressure of the hydrogen stored in the gas cylinder, that is, the higher the pressure of the hydrogen, the faster the rate. However, the sealing ring is easily damaged under high-pressure conditions, causing high-pressure hydrogen to leak from the gap between the gas cylinder and the connecting pipe. In order to avoid failure of the sealing ring, the pressure of the hydrogen stored in the gas cylinder can only be reduced, resulting in a lower hydrogen filling rate of the battery pack, affecting the production efficiency of the fuel cell. Summary of the invention

[0004] In order to solve the above technical problems and achieve at least one advantage of the present invention, the present invention provides a connecting mechanism, the connecting mechanism comprising:

[0005] A valve body, the valve body having an abutting end portion and a mounting portion, the abutting end portion is formed at one end portion of the mounting portion, the abutting end portion forms a second abutting wall, and the mounting portion and the abutting end portion together form an exhaust passage;

[0006] An assembly part, wherein the assembly part forms a plug-in channel;

[0007] A connecting pipe, wherein the connecting pipe comprises a connecting portion and a plug-in portion, one end portion of the connecting portion extends along the axial direction to form the plug-in portion, the plug-in portion and one end portion of the valve body are both assembled with the assembly part, the plug-in portion and the valve body are both made of metal materials with predetermined strength, and an end portion of the plug-in portion away from the connecting portion forms a first abutment wall, and when the connecting pipe and the valve body are assembled through the assembly part, the second abutment wall and the first abutment wall abut against and press against each other, the second abutment wall and / or the first abutment wall undergo plastic deformation, and a surface seal is formed between the connecting pipe and the valve body.

[0008] According to one embodiment of the present invention, an end portion of the plug-in portion away from the connecting portion forms an assembly channel, wherein an inner diameter of the assembly channel gradually increases in a direction extending from an end close to the connecting portion to an end away from the connecting portion, an inner wall of the plug-in portion forming the assembly channel is the first abutment wall, an outer peripheral wall of the abutment end portion is the second abutment wall, and a diameter of the abutment end portion gradually increases in a direction extending from an end away from the gas cylinder to an end close to the gas cylinder, and when the connecting pipe is assembled with the valve body through the assembly fitting, the abutment end portion is inserted into the assembly channel, and the second abutment wall abuts against the first abutment wall.

[0009] According to one embodiment of the present invention, an end portion of the plug-in portion away from the connecting portion forms an assembly channel, wherein the inner diameter of the assembly channel gradually increases in a direction extending from an end close to the connecting portion to an end away from the connecting portion, an end wall of the plug-in portion facing away from the connecting portion is the first abutment wall, an end wall of the abutment end portion facing the plug-in portion is the second abutment wall, the first abutment wall is opposite to the abutment end portion, and when the connecting pipe is assembled with the valve body through the assembly fitting, an end wall of the plug-in portion facing away from the connecting portion abuts against an end wall of the abutment end portion facing the plug-in portion.

[0010] According to one embodiment of the present invention, the exhaust channel is divided into a first channel and a second channel connected to the first channel, the abutting end forms the second channel, wherein the inner wall of the abutting end forming the second channel is the second abutting wall, the inner diameter of the second channel gradually increases from one end close to the first channel to one end away from the first channel, the outer peripheral wall of the plug-in part is the first abutting wall, and the diameter of the plug-in part gradually decreases along the direction extending toward the valve body, and when the connecting pipe is assembled with the valve body through the assembly part, the plug-in part is plugged into the second channel and the outer wall of the first abutting wall abuts against the inner wall of the second channel.

[0011] According to one embodiment of the present invention, one end of the mounting portion extends axially to form the abutment end portion, forming an internal thread distributed on the inner wall of the insertion channel, an external thread is formed on the outer periphery of the valve body, the insertion portion is inserted into the insertion channel, and part of the valve body is inserted into the insertion channel and threadedly connected.

[0012] According to an embodiment of the present invention, the assembly part forms a first stop step, and the plug-in portion forms a second stop step. When the assembly part is rotated to be threadedly connected with the valve body, the first stop step is pressed against the second stop step.

[0013] According to one embodiment of the present invention, the connecting portion includes a first mounting portion and a second mounting portion, one end portion of the first mounting portion extends axially to form the second mounting portion and the abutting end portion, the first mounting portion and the abutting end portion jointly form the exhaust passage, the abutting end portion is sleeved on the second mounting portion, the outer wall of the assembly part forms an external thread, the inner wall of the second mounting part forms an internal thread, the plug-in portion is plugged into the plug-in passage, and the assembly part is threadedly inserted into the second mounting part.

[0014] According to one embodiment of the present invention, the assembly part is sleeved on the valve body and forms an internal thread on the inner wall of the insertion channel, an external thread is formed on the outer wall of one end of the connecting pipe close to the valve body, and the connecting pipe is threadedly inserted into the assembly part.

[0015] According to one embodiment of the present invention, the connecting mechanism also includes a hose and a fastening assembly, the fastening assembly includes a fastening structure, the fastening structure is annular and is formed at one end of the hose or at an end of the connecting portion away from the plug-in portion, the hose is sealingly assembled to the connecting portion through the fastening structure, the fastening structure is formed by the outer wall of an end of the connecting portion away from the plug-in portion or the inner wall of the hose, the hose can undergo elastic deformation, and the radial cross-sectional size of a single fastening structure gradually increases along the direction in which the hose is pulled out of the connecting portion.

[0016] In order to solve the above technical problems and achieve at least one advantage of the present invention, the present invention further provides a gas storage device, the gas storage device comprising:

[0017] The connecting mechanism as described above;

[0018] A gas cylinder, wherein the gas cylinder has a mounting portion, the mounting portion is threadedly connected to the mounting portion, the gas cylinder forms a gas storage cavity, and the gas in the gas storage cavity can be discharged from the gas cylinder through the exhaust channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of an embodiment of the gas storage device of the present invention is shown.

[0020] Figure 2 A schematic structural diagram of another embodiment of the gas storage device of the present invention is shown.

[0021] Figure 3 An exploded view of the connection mechanism of the present invention is shown.

[0022] Figure 4 A cross-sectional view of an embodiment of the connecting mechanism of the present invention is shown.

[0023] Figure 5A partial cross-sectional view of an embodiment of the gas storage device of the present invention is shown.

[0024] Figure 6 Shows Figure 4 A partial enlarged view of part A.

[0025] Figure 7 Shows Figure 5 A partial enlarged view of part B.

[0026] Figure 8 Shows Figure 4 A partial enlarged view of part C in the middle.

[0027] Fig. 9 A partial cross-sectional view of another embodiment of the gas storage device of the present invention is shown.

[0028] Fig.10 Shows Figure 8 A partial enlarged view of part D in the middle.

[0029] Fig.11 Shows Fig. 9 A partial enlarged view of part E in the middle.

[0030] Fig.12 A partial structural cross-sectional view of the connecting mechanism of the present invention is shown. DETAILED DESCRIPTION

[0031] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0032] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0033] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0034] refer to Figures 1 to 12 A gas storage device according to a preferred embodiment of the present invention will be described in detail below. The gas storage device includes a gas storage bottle 900 and a connecting mechanism 100.

[0035] Specifically, the connection mechanism 100 includes a valve body 10 , a fitting 20 and a connection pipe 30 .

[0036] The valve body 10 is installed on the gas cylinder 900. The gas cylinder 900 forms a gas storage cavity 9001, and the valve body 10 forms the exhaust passage 101. The gas storage cavity 9001 is used to store gas, and the gas in the gas storage cavity 9001 can be discharged from the gas cylinder 900 through the exhaust passage 101.

[0037] The connecting pipe 30 includes a connecting portion 31 and an inserting portion 32. One end of the connecting portion 31 extends along the axial direction to form the inserting portion 32.

[0038] The plug-in portion 32 and one end of the valve body 10 away from the gas cylinder 900 are respectively assembled with the assembly part 20, and the connecting pipe 30 is connected to one end of the valve body 10 away from the gas cylinder 900 through the assembly part 20. It is worth mentioning that the plug-in portion 32 and the valve body 10 are both made of a metal material with a predetermined strength.

[0039] The end of the plug-in portion 32 away from the connecting portion 31 forms a first abutting wall 3201. The end of the valve body 10 away from the gas cylinder 900 forms a second abutting wall 102. When the connecting pipe 30 and the valve body 10 are assembled through the assembly part 20, the second abutting wall 102 and the first abutting wall 3201 abut against each other and apply pressure to each other, so that the second abutting wall 102 and / or the first abutting wall 3201 undergo plastic deformation to increase the sealing area between the connecting pipe 30 and the valve body 10, thereby enhancing the sealing effect. The connecting pipe 30 and the valve body 10 are kept in sealed abutment through the assembly part 20.

[0040] It can be understood that, since the plug-in portion 32 and the valve body 10 are both made of a metal material with a predetermined strength, the plug-in portion 32 and the valve body 10 both have a predetermined strength, so that the gas storage device can be used for the storage and subpackaging of high-pressure gas. In the process of the gas contained in the gas cylinder 900 being injected into the subpackaging vessel connected to the end of the connecting pipe 30 away from the gas cylinder 900 through the valve body 10 and then through the connecting pipe 30, the plug-in portion 32 and the valve body 10 are not easily deformed under the impact of the high-pressure gas, so that the plug-in portion 32 and the valve body 10 are always kept in sealing contact with each other, thereby maintaining the pressure of the gas stored in the gas cylinder 900, so that the subpackaging rate of the high-pressure gas can be improved.

[0041] Preferably, the valve body 10 has an abutting end portion 11 and a mounting portion 12, the abutting end portion 11 and the mounting portion 12 are integrally formed, and the abutting end portion 11 is formed at one end of the mounting portion 12 away from the gas cylinder 900. The abutting end portion 11 forms the second abutting wall 102, and the mounting portion 12 and the abutting end portion 11 jointly form the exhaust passage 101. Both ends of the mounting portion 12 are connected to the gas cylinder 900 and the assembly part 20, respectively. It is worth mentioning that the assembly part 20 forms a plug-in passage 201.

[0042] refer to Figures 4 to 7 In one embodiment, the plug-in portion 32 and the connecting portion 12 are respectively assembled with the assembly part 20. An end of the plug-in portion 32 away from the connecting portion 31 forms an assembly channel 3202, wherein the inner diameter of the assembly channel 3202 gradually increases from the end close to the connecting portion 31 to the direction extending away from the connecting portion 31.

[0043] Preferably, one end of the plug-in portion 32 close to the abutting end portion 11 is turned inward or outward to increase the strength of the plug-in portion 32 in forming the assembly channel 3202 , thereby improving the connection strength between the plug-in portion 32 and the valve body 10 .

[0044] refer to Figure 7 In one example, the inner wall of the plug-in portion 32 forming the assembly channel 3202 is the first abutting wall 3201. The outer peripheral wall of the abutting end portion 11 is the second abutting wall 102, and the diameter of the abutting end portion 11 gradually increases along the direction extending from the end away from the gas cylinder 900 to the end close to the gas cylinder 900. When the connecting pipe 30 is assembled with the valve body 10 through the assembly part 20, the abutting end portion 11 is inserted into the assembly channel 3202, and the second abutting wall 102 abuts against the first abutting wall 3201.

[0045] Preferably, the hardness of the first abutting wall 3201 is lower than that of the second abutting wall 102. When the second abutting wall 102 abuts against the first abutting wall 3201, the first abutting wall 3201 is squeezed by the valve body 10 and undergoes plastic deformation, so that an annular surface seal is formed between the connecting pipe 30 and the abutting end portion 11, thereby improving the sealing effect of the two.

[0046] refer to Figure 4As a variation of the above example, one end wall of the plug-in portion 32 facing away from the connecting portion 31 is the first abutting wall 3201. One end wall of the abutting end portion 11 facing the plug-in portion 32 is the second abutting wall 102. The first abutting wall 3201 is opposite to the abutting end portion 11. When the connecting pipe 30 is assembled with the valve body 10 through the assembly part 20, one end wall of the plug-in portion 32 facing away from the connecting portion 31 abuts against one end wall of the abutting end portion 11 facing the plug-in portion 32.

[0047] Preferably, when the first abutting wall 3201 abuts against the second abutting wall 102, both the second abutting wall 102 and the first abutting wall 3201 undergo plastic deformation, so that an annular surface seal is formed between the plug-in portion 32 and the abutting end portion 11, thereby improving the sealing effect of both.

[0048] In the above two examples, since the inner diameter of the assembly channel 3202 gradually increases from the end close to the connecting portion 31 to the end extending away from the connecting portion 31, the assembly channel 3202 is in a bell-mouth shape, and the gas is diffused before flowing through the connecting portion 31, thereby reducing the vortex phenomenon of the fluid in the connecting tube 30 and preventing the connecting tube 30 from detaching from the abutting end 11.

[0049] refer to Figures 9 to 11 As a variation of the above embodiment, the exhaust channel 101 is divided into a first channel 1011 and a second channel 1012 connected to the first channel 1011. The abutting end 11 forms the second channel 1012, wherein the inner wall of the abutting end 11 forming the second channel 1012 is the second abutting wall 102. The inner diameter of the second channel 1012 gradually increases from the end close to the first channel 1011 to the end away from the first channel 1011. The outer peripheral wall of the plug-in portion 32 is the first abutting wall 3201, and the diameter of the plug-in portion 32 gradually decreases along the direction extending toward the valve body 10. When the connecting pipe 30 is assembled with the valve body 10 through the assembly part 20, the plug-in portion 32 is plugged into the second channel 1012 and the outer wall of the first abutting wall 3201 abuts against the inner wall of the second channel 1012.

[0050] Preferably, the hardness of the first abutting wall 3201 is higher than that of the second abutting wall 102. When the second abutting wall 102 abuts against the first abutting wall 3201, the second abutting wall 102 is squeezed by the connecting tube 30 and undergoes plastic deformation, so that an annular surface seal is formed between the plug-in portion 32 and the abutting end portion 11, thereby improving the sealing effect of the two.

[0051] In one embodiment, the end of the mounting portion 12 away from the gas cylinder 900 extends axially to form the abutting end portion 11. The inner wall of the plug-in passage 201 is provided with internal threads, and the outer periphery of the end of the valve body 10 away from the gas cylinder 900 is provided with external threads. The plug-in portion 32 is plugged into the plug-in passage 201, and part of the valve body 10 is plugged into the plug-in passage 201 and threadedly connected, and then the connecting pipe 30 is assembled with the valve body 10 through the assembly part 20.

[0052] refer to Fig.10 and Fig.11 Further, the assembly part 20 forms a first stop step 21. The plug-in part 32 forms a second stop step 321. When the assembly part 20 is rotated to be threadedly connected with the valve body 10, the first stop step 21 applies pressure to the second stop step 321, so that the assembly part 20 and the plug-in part 32 are sealed and connected, so as to further improve the sealing performance of the connection mechanism 100.

[0053] refer to Figure 4 As a deformable method, the connecting portion 12 includes a first mounting portion 121 and a second mounting portion 122. One end of the first mounting portion 121 is connected to the gas cylinder 900, and one end of the first mounting portion 121 away from the gas cylinder 900 extends axially to form the second mounting portion 122 and the abutting end portion 11. The first mounting portion 121 and the abutting end portion 11 together form the exhaust passage 101, and the abutting end portion 11 is sleeved on the second mounting portion 122. The outer wall of the assembly part 20 forms an external thread, and the inner wall of the second mounting portion 122 forms an internal thread. The plug-in portion 32 is plugged into the plug-in passage 201, and the assembly part 20 is threadedly inserted into the second mounting portion 122, so that the connecting pipe 30 is assembled with the valve body 10 through the assembly part 20.

[0054] refer to Figure 6 and Figure 7 In another variant embodiment, the assembly part 20 is sleeved on the valve body 10, and an internal thread is formed on the inner wall of the insertion channel 201. An external thread is formed on the outer wall of one end of the connecting pipe 30 close to the valve body 10. The connecting pipe 30 is threadedly inserted into the assembly part 20, so that the connecting pipe 30 is assembled with the valve body 10 through the assembly part 20.

[0055] Further, the assembly part 20 forms a first stop step 21A and the valve body 10 forms a second stop step 321A, and when the assembly part 20 is rotated to be threadedly connected with the connecting pipe 30, the first stop step 21A formed by the assembly part 20 applies pressure to the second stop step 321A, so that the assembly part 20 and the valve body 10 are sealed and connected, so as to further improve the sealing performance of the connecting mechanism 100.

[0056] In one embodiment, the connecting pipe 30 further includes a curved portion 33. Both ends of the curved portion 33 are respectively connected to one of the connecting portions 31, and the plug-in portion 32 is formed at one end of any of the connecting portions 31 away from the curved portion 33. The arrangement of the curved portion 33 can facilitate the connecting pipe 30 to connect the dispensing container offset from the axis of the exhaust channel 101.

[0057] Preferably, the bending portion 33 and the connecting portion 31 are integrally formed.

[0058] Specifically, the hardness of the metal used to make the curved portion 33 is higher than the hardness of the metal used to make the connecting portion 31. It is understandable that when high-pressure gas flows in the connecting pipe 30, the impact force of the high-pressure gas on the inner wall of the curved portion 33 is greater than the impact force of the high-pressure gas on the inner wall of the connecting portion 31, so the curved portion 33 is more easily damaged than the connecting portion 31. Therefore, the hardness of the metal used to make the curved portion 33 higher than the hardness of the metal used to make the connecting pipe 30 longer.

[0059] In another embodiment, the connection mechanism 100 further includes a hose 40 and a fastening assembly 50. The fastening assembly 50 includes a fastening structure 51, which is formed in a ring shape at one end of the hose 40 or at one end of the connection portion 31 away from the plug-in portion 32. The hose 40 is sealedly assembled to the connection portion 31 through the fastening structure 51. Due to the existence of the hose 40, the gas cylinder 900 and the packaging container offset from the axis of the exhaust channel 101 can still be connected through the connection mechanism 100 without the bending portion 33, thereby improving the convenience of the connection mechanism 100.

[0060] Specifically, the fastening structure 51 is formed on the outer wall of one end of the connecting portion 31 away from the plug-in portion 32 or the inner wall of the hose 40, and the hose 40 can be elastically deformed. The radial cross-sectional size of a single fastening structure 51 gradually increases along the connecting portion 31 in the direction of withdrawing the hose 40, and after the connecting portion 31 is inserted into the hose 40, the fastening structure 51 tightly abuts against the inner wall of the hose 40 or the outer wall of the connecting portion 31 to seal the connecting portion 31 with the hose 40 to prevent fluid leakage from the connection between the two.

[0061] Preferably, a plurality of the fastening structures 51 are provided, and the plurality of the fastening structures 51 are distributed along the length direction of the connecting part 31 or the hose 40, so that when the connecting part 31 is inserted into the hose 40, the plurality of the fastening structures 51 simultaneously abut against the inner wall of the hose 40 or the outer wall of the connecting part 31 to improve the sealing performance of the connection between the hose 40 and the connecting part 31.

[0062] Furthermore, the fastening assembly 50 further includes a reinforcing member 52, which is sleeved on one end of the hose 40 and the connecting portion 31. The reinforcing member 52 can be plastically deformed by an external force and exert pressure on the hose 40, so that the hose 40 is tightly attached to the connecting portion 31, further improving the sealing and firmness of the connection between the hose 40 and the connecting portion 31, and can meet the use requirements in high-pressure places compared to the existing sealing methods.

[0063] Specifically, the gas cylinder 900 has an assembly portion 910 , the assembly portion 12 has an outer thread formed on an outer wall of one end of the gas cylinder 900 , the assembly portion 910 has an inner thread formed on an inner wall, and the assembly portion 12 is threadedly connected to the assembly portion 910 .

[0064] Furthermore, the gas storage device also includes a sealing ring 800 .

[0065] The valve body 10 further comprises a plug-in end portion 13, and an end of the mounting portion 12 away from the connecting pipe 30 extends axially to form the plug-in end portion 13. The plug-in end portion 13 is plugged into the assembly portion 910, and the sealing ring 800 is installed between the plug-in end portion 13 and the assembly portion 910 in a manner capable of sealing a gap therebetween.

[0066] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A connecting mechanism, characterized in that: The connecting mechanism comprises: A valve body, the valve body having an abutting end portion and a mounting portion, the abutting end portion is formed at one end portion of the mounting portion, the abutting end portion forms a second abutting wall, and the mounting portion and the abutting end portion together form an exhaust passage; An assembly part, wherein the assembly part forms a plug-in channel; A connecting pipe, wherein the connecting pipe comprises a connecting portion and a plug-in portion, one end portion of the connecting portion extends along the axial direction to form the plug-in portion, the plug-in portion and one end portion of the valve body are both assembled with the assembly part, the plug-in portion and the valve body are both made of metal materials with predetermined strength, and an end portion of the plug-in portion away from the connecting portion forms a first abutment wall, and when the connecting pipe and the valve body are assembled through the assembly part, the second abutment wall and the first abutment wall abut against and press against each other, the second abutment wall and / or the first abutment wall undergo plastic deformation, and a surface seal is formed between the connecting pipe and the valve body.

2. The connection mechanism according to claim 1, characterized in that: An end of the plug-in portion away from the connecting portion forms an assembly channel, wherein an inner diameter of the assembly channel gradually increases in a direction extending from an end close to the connecting portion to an end away from the connecting portion, an inner wall of the plug-in portion forming the assembly channel is the first abutment wall, an outer peripheral wall of the abutment end is the second abutment wall, and a diameter of the abutment end gradually increases in a direction extending from an end away from the gas cylinder to an end close to the gas cylinder, and when the connecting pipe is assembled with the valve body through the assembly fitting, the abutment end is inserted into the assembly channel, and the second abutment wall abuts against the first abutment wall.

3. The connection mechanism according to claim 1, characterized in that: An assembly channel is formed at one end of the plug-in portion away from the connecting portion, wherein an inner diameter of the assembly channel gradually increases from an end close to the connecting portion to a direction extending away from the end of the connecting portion, an end wall of the plug-in portion facing away from the connecting portion is the first abutment wall, and an end wall of the abutment end portion facing the plug-in portion is the second abutment wall, and the first abutment wall is opposite to the abutment end portion. When the connecting pipe is assembled with the valve body through the assembly fitting, an end wall of the plug-in portion facing away from the connecting portion abuts against an end wall of the abutment end portion facing the plug-in portion.

4. The connection mechanism according to claim 1, characterized in that: The exhaust channel is divided into a first channel and a second channel connected to the first channel, the abutting end forms the second channel, wherein the inner wall of the abutting end forming the second channel is the second abutting wall, the inner diameter of the second channel gradually increases from one end close to the first channel to one end away from the first channel, the outer peripheral wall of the plug-in part is the first abutting wall, and the diameter of the plug-in part gradually decreases along the direction extending toward the valve body, when the connecting pipe is assembled with the valve body through the assembly part, the plug-in part is plugged into the second channel and the outer wall of the first abutting wall abuts against the inner wall of the second channel.

5. The connection mechanism according to any one of claims 2 to 4, characterized in that: One end of the mounting portion extends axially to form the abutment end portion, forming an inner wall of the insertion channel with internal threads, an outer periphery of the valve body forms an external thread, the insertion portion is inserted into the insertion channel, and part of the valve body is inserted into the insertion channel and threadedly connected.

6. The connection mechanism according to claim 5, characterized in that: The assembly part forms a first stop step, and the plug-in part forms a second stop step. When the assembly part is rotated to be threadedly connected with the valve body, the first stop step is pressed against the second stop step.

7. The connection mechanism according to any one of claims 2 to 4, characterized in that: The connecting portion includes a first mounting portion and a second mounting portion, one end of the first mounting portion extends axially to form the second mounting portion and the abutting end portion, the first mounting portion and the abutting end portion together form the exhaust passage, the abutting end portion is sleeved on the second mounting portion, the outer wall of the assembly part forms an external thread, the inner wall of the second mounting part forms an internal thread, the plug-in portion is plugged into the plug-in passage, and the assembly part is threadedly inserted into the second mounting part.

8. The connecting mechanism according to any one of claims 2 to 4, characterized in that: The assembly part is sleeved on the valve body, and the inner wall of the insertion channel is provided with internal threads. The outer wall of one end of the connecting pipe close to the valve body is provided with external threads, and the connecting pipe is threadedly inserted into the assembly part.

9. The connection mechanism according to claim 8, characterized in that: The connecting mechanism also includes a hose and a fastening assembly, wherein the fastening assembly includes a fastening structure, which is annular and formed at one end of the hose or at one end of the connecting part away from the plug-in part, and the hose is sealingly assembled to the connecting part through the fastening structure, and the fastening structure is formed by the outer wall of the end of the connecting part away from the plug-in part or the inner wall of the hose, and the hose can undergo elastic deformation, and the radial cross-sectional size of a single fastening structure gradually increases along the direction in which the hose is pulled out of the connecting part.

10. A gas storage device, characterized in that: The gas storage device comprises: The connecting mechanism according to any one of claims 1 to 9; A gas cylinder, wherein the gas cylinder has a mounting portion, the mounting portion is threadedly connected to the mounting portion, the gas cylinder forms a gas storage cavity, and the gas in the gas storage cavity can be discharged from the gas cylinder through the exhaust channel.

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