Gas delivery assembly

Abstract

The embodiment of the utility model provides a gas conveying assembly, which comprises a connector, a first gas flow channel, a second gas flow channel, a first gas flow channel, a second gas flow channel and a second gas flow channel, wherein the connector is provided with two open ends and is formed between the two open ends; the air delivery pipe is inserted into one open end of the connector, and the interior of the air delivery pipe is communicated with the first airflow channel; the sealing structure comprises an extruding part and an extruded part; one of the extrusion part and the extruded part is arranged at one open end of the connector, and the other one of the extrusion part and the extruded part is arranged on the air delivery pipe; wherein the strength of the extrusion part is greater than that of the extruded part; and the extruded part is extruded by the inserted extrusion part to deform, so that a connected sealing surface is formed between the extruded part and the extrusion part. After the extruding part abuts against the extruded part, the locking piece is pushed to enable the extruding part to be continuously inserted and extrude the extruded part, so that the extruded part can wrap part of the extruding part due to deformation after being extruded, and the extruded part can be connected with the contact face of the extruding part in a sealed mode.

Description

Technical Field

[0001] The present disclosure relates to gas transportation, and particularly to gas transportation components. Background Art

[0002] Gas cylinders are mainly used to store various compressed gases, such as nitrogen, hydrogen, and natural gas, etc., and have a wide range of uses. The gas cylinder and various components are connected through connectors and gas pipelines to form a gas flow path to meet the functions such as filling and supplying of the gas system. When the existing connectors and gas pipelines are connected, the sealing effect between the connector and the gas pipeline is mostly achieved by squeezing a gasket located between the connector and the gas pipeline. However, the gasket is prone to breakage after being pressurized under a large pressure for a long time, resulting in a significant reduction in the sealing effect between the connector and the gas pipeline, and further causing the gas in the gas cylinder to leak to the outside. Summary of the Invention

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present disclosure is to provide a gas transportation component to solve the problems in the related art.

[0004] The first aspect of the present disclosure provides a gas transportation component, including:

[0005] A connector having two open ends and a first gas flow channel formed between the two open ends;

[0006] A gas pipeline inserted into one of the open ends of the connector and internally communicating with the first gas flow channel;

[0007] A sealing structure including a squeezing portion and a squeezed portion; one of the squeezing portion and the squeezed portion is provided at one of the open ends of the connector, and the other is provided on the gas pipeline; wherein, the strength of the squeezing portion is greater than the strength of the squeezed portion; the squeezed portion is deformed by the inserted squeezing portion to form an adjacent sealing surface with the squeezing portion.

[0008] In an embodiment of the first aspect, the squeezed portion is provided at one of the open ends of the connector; the squeezing portion is provided at one end of the gas pipeline inserted into the connector.

[0009] In an embodiment of the first aspect, the squeezed portion is implemented as a first curved surface with a straight generatrix; the squeezing portion is implemented as a second curved surface with an arc generatrix.

[0010] In an embodiment of the first aspect, it further includes a pushing and locking member through which the gas pipeline passes, and the pushing and locking member is in threaded cooperation with the open end where the squeezed portion is located.

[0011] In an embodiment of the first aspect, the pushing and locking member includes a fastening plate and a fastening tube; a force application hole for the gas transmission pipe to pass through is formed on the fastening plate; one wall surface of the fastening tube is connected to one wall surface of the fastening plate facing the connector; the gas transmission pipe passes through the force application hole and forms the extrusion part at one end located inside the fastening tube.

[0012] In an embodiment of the first aspect, a receiving part is formed at one end of the extrusion part facing the fastening plate; the diameter of the receiving part is larger than the inner diameter of the force application hole.

[0013] In an embodiment of the first aspect, the extrusion part is arranged at one of the open ends of the connector; the part to be extruded is arranged at one end of the gas transmission pipe inserted into the connector.

[0014] In an embodiment of the first aspect, the part to be extruded is implemented as a flanging shape covering the extrusion part; the cross-sectional contour of the extrusion part is a broken line.

[0015] In an embodiment of the first aspect, it further includes a fixing sleeve screwed to the open end of the connector where the extrusion part is arranged; the gas transmission pipe is sleeved in the inner cavity of the fixing sleeve; the outer diameter of the part to be extruded is set to gradually decrease along the direction from the outside to the inside of the gas transmission pipe, and the maximum outer diameter of the part to be extruded is larger than the inner diameter of the inner cavity.

[0016] In an embodiment of the first aspect, the part to be extruded is implemented as an elastic sealing ring, and the material hardness of the extrusion part is greater than that of the elastic sealing ring.

[0017] As described above, in the embodiment of the present disclosure, a gas transmission assembly is provided, including a connector having two open ends and a first air flow channel formed between the two open ends; a gas transmission pipe inserted into one of the open ends of the connector and internally communicating with the first air flow channel; a sealing structure including an extrusion part and a part to be extruded; one of the extrusion part and the part to be extruded is arranged at one of the open ends of the connector, and the other is arranged on the gas transmission pipe; wherein, the strength of the extrusion part is greater than that of the part to be extruded; the part to be extruded is deformed by the extrusion of the inserted extrusion part to form a contacting sealing surface with the extrusion part. After the extrusion part abuts against the inner wall of the part to be extruded, the present disclosure uses a pushing and locking member to further insert and extrude the inner wall of the part to be extruded by the extrusion part, so that the inner wall of the extruded part to be extruded can wrap part of the extrusion part due to deformation, thereby increasing the intermolecular force between the gas transmission pipe and the connector, and further improving the sealing effect between the contact surfaces of the extrusion part and the part to be extruded. Description of the Drawings

[0018] Figure 1Shows a schematic diagram of the overall structure of the gas delivery component of the present disclosure;

[0019] Figure 2 Shows a full-sectional schematic diagram of the connector and the gas pipeline in the gas delivery component of the present disclosure;

[0020] Figure 3 Shows the present disclosure Figure 2 An enlarged view of A therein.

[0021] Figure 4 Shows a schematic diagram of the structure of the push locking member in the gas delivery component of the present disclosure;

[0022] Figure 5 Shown therein is a cross-sectional schematic diagram of the overall structure of another embodiment of the gas delivery component of the present disclosure;

[0023] Figure 6 Shown therein is the present disclosure Figure 5 An enlarged view of B therein. Detailed Description of the Invention

[0024] The following uses specific specific examples to illustrate the embodiments of the present disclosure. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the information disclosed in the present disclosure. The present disclosure can also be implemented or applied through other different specific embodiments. Various details in the present disclosure can also be modified or changed according to different viewpoints and application modules without departing from the spirit of the present disclosure. It should be noted that, without conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0025] The following takes the accompanying drawings as a reference and details the embodiments of the present disclosure so that those skilled in the art to which the present disclosure pertains can easily implement it. The present disclosure can be embodied in many different forms and is not limited to the embodiments described herein.

[0026] In the description of the present disclosure, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics represented in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. Moreover, the specific features, structures, materials, or characteristics represented can be combined in a suitable manner in any one or a group of embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples represented in the present disclosure and the features of different embodiments or examples.

[0027] In addition, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the representation of the present disclosure, the meaning of "a group" is two or more, unless otherwise specifically defined.

[0028] To clearly illustrate the present disclosure, devices irrelevant to the description are omitted, and the same or similar constituent elements throughout the specification are given the same reference numerals.

[0029] Throughout the specification, when it is said that a device is "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" with other elements interposed therebetween. In addition, when it is said that a certain device "includes" a certain constituent element, unless there is a particularly contrary record, it does not exclude other constituent elements but means that other constituent elements may also be included.

[0030] Although in some examples the terms first, second, etc. are used herein to denote various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first interface and the second interface, etc. are indicated. Furthermore, as used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the stated features, steps, operations, elements, modules, items, kinds, and / or groups, but do not preclude the presence, occurrence or addition of one or more other features, steps, operations, elements, modules, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B and C". An exception to this definition only occurs when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way.

[0031] The technical terms used herein are only for referring to specific embodiments and are not intended to limit the present disclosure. The singular forms used herein also include the plural forms as long as the statement does not clearly indicate the contrary meaning. The meaning of "including" used in the specification is to embody specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0032] Although not differently defined, including the technical terms and scientific terms used herein, all terms have the same meaning as generally understood by those skilled in the technical field to which this disclosure pertains. Terms defined in commonly used dictionaries are additionally interpreted to have meanings consistent with the relevant technical literature and the currently presented information. Unless otherwise defined, they shall not be overly interpreted as ideal or overly formulaic meanings.

[0033] Figure 1 Shown therein is a schematic diagram of the overall structure of the gas delivery assembly of this disclosure. Figure 2 Shown therein is a full-sectional view of the connector 10 and the gas delivery pipe 20 in the gas delivery assembly of this disclosure. Figure 3 Shown therein is this disclosure Figure 2 An enlarged view of A therein. In Figure 1 or Figure 2 and Figure 3 In an example, the gas delivery assembly includes a connector 10, a gas delivery pipe 20, and a sealing structure 30.

[0034] The connector 10 has two open ends 11 and a first gas flow channel 101 formed between the two open ends 11. The gas delivery pipe 20 is inserted into one of the open ends 11 of the connector 10 and is internally communicated with the first gas flow channel 101.

[0035] The sealing structure 30 includes a squeezing portion 31 and a squeezed portion 32; one of the squeezing portion 31 and the squeezed portion 32 is provided at one of the open ends 11 of the connector 10, and the other is provided on the gas delivery pipe 20; wherein, the strength of the squeezing portion 31 is greater than the strength of the squeezed portion 32; the squeezed portion 32 is deformed by the inserted squeezing portion 31 to form a contacting sealing surface with the squeezing portion 31.

[0036] Those skilled in the art can understand that as the insertion degree of the connector and the gas delivery pipe deepens, the squeezing portion 31 gradually squeezes the squeezed portion 32. The wall surface of the squeezed portion 32 after being squeezed is deformed due to the squeezing and gradually wraps part of the squeezing portion 31. And as the deformation degree of the squeezed portion 32 increases, the contact area between the deformed squeezed portion 32 and the squeezing portion 31 increases. That is, the sealing surface where the squeezing portion 31 and the squeezed portion 32 are in contact increases, thereby improving the sealing effect between the contact surfaces of the squeezed portion 32 and the squeezing portion 31.

[0037] Furthermore, the distance between most molecules in the connector 10 and the squeezing portion 31 reaches the range of the molecular attraction force, so as to increase the molecular attraction force between the squeezed portion 32 and the squeezing portion 31, and further improve the sealing effect between the contact surfaces of the squeezed portion 32 and the squeezing portion 31.

[0038] Exemplarily, the other end of the connector 10 can be connected to a flexible tube. The advantage of such an arrangement is that the flexible tube can change the installation position of the other end according to actual installation requirements, so as to eliminate the installation tolerance during the installation and connection of the connector 10, thereby improving the installation convenience and efficiency of the connector 10.

[0039] Exemplarily, the squeezed portion 32 is implemented as a first curved surface with a straight generatrix, such as a cone or a frustum of a cone. The squeezing portion 31 is implemented as a second curved surface with an arc-shaped generatrix that interferes with the first curved surface, such as a bullet head. Further increase the sealing area where the squeezed portion 32 contacts the squeezing portion 31 after deformation.

[0040] In another embodiment, the squeezed portion is implemented as an elastic sealing ring, and the squeezing portion is implemented as being made of other materials with a hardness greater than that of the elastic sealing ring (such as copper alloy or stainless steel). In this way, the squeezed portion is elastically deformed under the extrusion of the inserted squeezing portion, so as to form a contacting and airtight sealing surface with the squeezing portion, thereby achieving the sealing effect at the connection between the connector and the gas transmission pipe.

[0041] Returning to Figure 1 In the example, the gas transmission assembly further includes a pushing and locking member 40 for sleeving the gas transmission pipe 20, and the pushing and locking member 40 is in threaded cooperation with the open end 11 where the squeezed portion 32 is located.

[0042] Figure 4 Shown in is a schematic structural view of the pushing and locking member 40 in the gas transmission assembly of the present disclosure. In Figure 2 and Figure 4 In the example, an outer wall surface of the open end 11 of the connector 10 where the squeezed portion 32 is provided forms a first external thread 13, and a second internal thread 321 that is in screwed cooperation with the first external thread is formed on an inner wall of the fastening cavity 4201.

[0043] Exemplarily, the pushing and locking member 40 includes a fastening plate 41 and a fastening tube 42. A force application hole 4101 is formed on the fastening plate 41. One wall surface of the fastening tube 42 is connected to one wall surface of the fastening plate 41 facing the connector 10. A fastening cavity 4201 is formed inside the fastening tube 42 along the length direction. One end of the gas transmission pipe 20 passing through the force application hole 4101 and the fastening cavity 4201 forms the squeezing portion 31. The fastening cavity 4201 is used to sleeved the end of the connector 10 where the squeezed portion 32 is formed.

[0044] Exemplarily, one end of the extrusion part 31 facing the fastening plate 41 forms a blocking part 311; the diameter of the blocking part 311 is greater than the inner diameter of the force application hole 4101. Exemplarily, the hardness of the fastening plate 41 is greater than that of the extrusion part 31. To prevent the fastening plate 41 from deforming due to its hardness being lower than that of the extrusion part 31 when the extrusion part 31 is inserted into the extrusion-receiving part 32, resulting in the extrusion part 31 being unable to be smoothly inserted into the extrusion-receiving part 32. In some embodiments, the cross-sectional area of the extrusion part 31 is greater than the area of the force application hole 4101.

[0045] In Figure 3 an example, the wall surface of one end of the extrusion part 31 facing away from the connector 10 is implemented as a plane parallel to the fastening plate 41. In this way, by increasing the contact area between the extrusion part 31 and the fastening plate 41, the force application effect of the fastening plate 41 on the extrusion part 31 is improved, and at the same time, the situation of the extrusion part 31 detaching from the extrusion-receiving part 32 is avoided.

[0046] In some embodiments, the wall surface of the blocking part 211 is implemented as a spherical surface, while the wall surface of the fastening plate 41 in contact with the extrusion part 31 is implemented as a plane. In this way, the contact area between the extrusion part 31 and the fastening plate 41 can be reduced, thereby reducing the friction force between the extrusion part 31 and the fastening plate 41 when the push locking member 40 rotates, reducing the resistance when the push locking member 40 rotates, and improving the installation efficiency.

[0047] Exemplarily, the outer wall surface of the fastening tube 42 is implemented with a regular hexagon cross-section to facilitate the installer to relatively rotate the fastening tube 42 and the connector 10. As the fastening tube 42 and the connector 10 are rotated closer to each other, the extrusion part 31 gradually penetrates into the extrusion-receiving part 32.

[0048] In some embodiments, the push locking member 40 is fixedly connected to the gas transmission pipe 20. After the extrusion part 31 abuts against the extrusion-receiving part 32, the connection and sealing between the connector 10 and the gas transmission pipe 20 are achieved by rotating the connector 10 or the push locking member 40, and then the assembled combination of the connector 10 and the gas transmission pipe 20 is installed on the gas tank for storing gas to achieve the connection between the connector 10 and the gas tank; at the same time, the sliding frequency of the push locking member 40 on the wall surface of the gas transmission pipe 20 can be reduced, and the wear of the wall of the gas transmission pipe 20 caused by the sliding of the push locking member 40 can be reduced; secondly, the integrity and aesthetics of the gas transmission pipe 20 and the push locking member 40 are also improved.

[0049] Figure 5The cross-sectional schematic view of the overall structure of another embodiment of the gas delivery assembly of the present disclosure is shown. Figure 6 As shown in Figure 5 The enlarged view of B in Figure 5 and Figure 6 In the example, the extrusion part 31A is arranged at one open end 11A of the connector 10A; the part to be extruded 32A is arranged at one end of the gas delivery pipe 20A inserted into the connector 10A. Exemplarily, the part to be extruded 32A is implemented as a flanging shape covering the extrusion part. The flanging shape of the part to be extruded 32A is implemented as being formed by inverting or outverting the end of the gas delivery pipe 20A, which can increase the contact area between the part to be extruded 32A and the extrusion part 31A after being extruded. Further improve the sealing effect between the contact surfaces of the part to be extruded 32A and the extrusion part 31A.

[0050] Exemplarily, the cross-sectional profile of the extrusion part 31A is a broken line. Such as an inverted U shape or an inverted V shape. The advantage of such a setting is that after the extrusion part 31A extrudes the part to be extruded 32A and causes deformation, the contour line of the cross-section of the sealing surface where the extrusion part 31A and the part to be extruded 32A are in contact is a broken line with at least one turning point. In this way, the difficulty for the gas flowing through the inside of the connector 10A to overflow from the sealing space where the extrusion part 31A and the part to be extruded 32A are in contact to the outside increases, further improving the effect of preventing gas leakage.

[0051] Those skilled in the art can understand that inverting or outverting the end of the gas delivery pipe 20A can increase the wall thickness of the end of the gas delivery pipe 20A, thereby increasing the contact area between the extrusion part 31A and the end of the gas delivery pipe 20A implemented as the part to be extruded 32A. Especially after the extrusion part 31A extrudes the part to be extruded 32A, the inverting or outverting part of the pipe wall swings in the direction close to the extrusion part 31A, making the cross-section of the sealing surface where the extrusion part 31A and the part to be extruded 32A are in contact in a "Ji" shape, thereby improving the sealing effect between the contact surfaces of the part to be extruded 32A and the extrusion part 31A.

[0052] In Figure 5In the example, the gas delivery assembly further includes a fixing sleeve 50 screwed to the connector 10A. The gas delivery pipe 20A is sleeved in the inner cavity of the fixing sleeve 50 (not shown in the figure). Exemplarily, the outer diameter of the gas delivery pipe 20A is adapted to the inner cavity. The outer diameter of the squeezed portion 32A is set to gradually decrease along the outer direction of the gas delivery pipe 20A, and the maximum outer diameter of the squeezed portion 32A is greater than the inner diameter of the inner cavity. In this way, after the gas delivery pipe 20A is sleeved in the inner cavity of the fixing sleeve 50, the fixing sleeve 50 is screwed to the connector 10A. When the fixing sleeve 50 is screwed into the connector 10A, the squeezed portion 32A is pressed against the squeezing portion 31A to realize the deformation sealing between the squeezing portion 31A and the squeezed portion 32A.

[0053] In Figure 1 In the example, the gas delivery pipe 20 can be bent according to actual needs. Exemplarily, the hardness of the squeezing portion 31 is greater than that of the bent pipe section of the gas delivery pipe 20; the hardness of the bent pipe section of the gas delivery pipe 20 is greater than that of the straight pipe section of the gas delivery pipe 20. In this way, it is possible to avoid the dangerous situation that the pipe body of the bent pipe section of the gas delivery pipe 20 is bent and broken, resulting in gas leakage, and improve the safety factor of the equipment operation. In some embodiments, by increasing the wall thickness of the bent pipe section of the gas delivery pipe 20, it is possible to avoid the situation that the pipe body of the gas delivery pipe 20 is bent and broken.

[0054] In some embodiments, the squeezed portion 32 can be implemented independently. For example, the squeezed portion 32 is implemented as being made of other metal materials with a hardness less than that of the connector 10. An installation cavity is formed at the open end 11 of the connector 10, and the squeezed portion 32 is fixedly arranged in the installation cavity. In this way, on the one hand, since the hardness of the connector 10 is not changed, the connector 10 can be prevented from being easily damaged due to external bumps due to a decrease in hardness. At the same time, it is still possible to realize that the squeezing portion 31 is squeezed into the squeezed portion 32, so that the squeezed portion 32 is deformed to wrap the squeezing portion 31, and the sealing effect between the contact surfaces of the squeezed portion 32 and the squeezing portion 31 is realized.

[0055] In some embodiments, each of the other ends of the gas delivery pipe 20 forms a squeezing portion 31. Correspondingly, the number of the pushing and locking members 40 is adapted to the number of the squeezing portions 31 and is communicated with other components in the above manner.

[0056] In some embodiments, another open end 11 of the connector 10 also forms a squeezed portion 32, and the connection with the gas tank storing gas is realized in the above manner.

[0057] In summary, the present disclosure provides a gas delivery assembly in an embodiment. A connector has two open ends and a first air flow channel formed between the two open ends. An air delivery pipe is inserted into one of the open ends of the connector and is internally communicated with the first air flow channel. A sealing structure includes a pressing portion and a pressed portion. One of the pressing portion and the pressed portion is disposed at one of the open ends of the connector, and the other is disposed on the air delivery pipe. Wherein, the strength of the pressing portion is greater than the strength of the pressed portion. The pressed portion is deformed by the insertion of the pressing portion, so as to be in sealing contact with the contact surface of the pressing portion. After the pressing portion abuts against the inner wall of the pressed portion, the present disclosure makes the pressing portion continue to insert and press the inner wall of the pressed portion by pushing a locking member, so that the inner wall of the pressed portion after being pressed can wrap part of the pressing portion due to deformation, thereby increasing the intermolecular force between the air delivery pipe and the connector, and further improving the sealing effect between the contact surface of the pressing portion and the pressed portion.

[0058] The above embodiments are only used to exemplarily illustrate the principles and effects of the present disclosure, rather than to limit the present disclosure. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present disclosure. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present disclosure should still be covered by the protection scope of the present disclosure.

Claims

1. A gas delivery assembly, characterized in that, Comprising: A connector having two open ends and a first air flow channel formed between the two open ends; An air delivery pipe inserted into one of the open ends of the connector and internally communicating with the first air flow channel; A sealing structure including a squeezing portion and a squeezed portion; one of the squeezing portion and the squeezed portion is provided at one of the open ends of the connector, and the other is provided on the air delivery pipe; wherein, the strength of the squeezing portion is greater than the strength of the squeezed portion; the squeezed portion is deformed by the inserted squeezing portion to form an abutting sealing surface with the squeezing portion.

2. The gas delivery assembly according to claim 1, wherein The squeezed portion is provided at one of the open ends of the connector; the squeezing portion is provided at one end of the air delivery pipe inserted into the connector.

3. The gas delivery component according to claim 2, wherein The squeezed portion is implemented as a first curved surface with a straight generatrix; the squeezing portion is implemented as a second curved surface with an arc generatrix.

4. The gas delivery assembly according to claim 2, wherein Further included is a pushing and locking member through which the air delivery pipe passes, and the pushing and locking member is in threaded cooperation with the open end where the squeezed portion is located.

5. The gas delivery component according to claim 4, wherein The pushing and locking member includes a fastening plate and a fastening pipe; a force application hole through which the air delivery pipe passes is formed on the fastening plate; one wall surface of the fastening pipe is joined to one wall surface of the fastening plate facing the connector; the air delivery pipe passes through the force application hole and forms the squeezing portion at one end of the fastening pipe.

6. The gas delivery assembly according to claim 5, wherein A blocked portion is formed at one end of the squeezing portion facing the fastening plate; the diameter of the blocked portion is greater than the inner diameter of the force application hole.

7. The gas delivery assembly according to claim 1, wherein The squeezing portion is provided at one of the open ends of the connector; the squeezed portion is provided at one end of the air delivery pipe inserted into the connector.

8. The gas delivery assembly according to claim 7, wherein The squeezed portion is implemented as a flanging shape covering the squeezing portion; the contour line of the cross-section of the squeezing portion is a broken line.

9. The gas delivery component according to claim 7, wherein, Further included is a fixing sleeve screwed onto the open end of the connector where the squeezing portion is provided; the air delivery pipe is sleeved in the inner cavity of the fixing sleeve; the outer diameter of the squeezed portion is set to gradually decrease in the direction from the outside to the inside of the air delivery pipe, and the maximum outer diameter of the squeezed portion is greater than the inner diameter of the inner cavity.

10. The gas delivery component according to claim 1, wherein, The squeezed portion is implemented as an elastic sealing ring, and the material hardness of the squeezing portion is greater than that of the elastic sealing ring.

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