Adapter, pipe assembly, gluing gun head and gluing device

Abstract

The invention provides an adapter, a pipe assembly, a gluing gun head and a gluing device. The adapter is used for connecting a first pipe component and a second pipe component, the adapter comprises a pipe joint, the pipe joint is provided with a first containing part and a second containing part which are arranged in a spaced mode in the first direction, the first containing part is used for being connected with the first pipe component, and the second containing part is used for being connected with the second pipe component; the first sealing ring is arranged between the first containing part and the second containing part, so that the first pipe component and the second pipe component can abut against the first sealing ring from the two sides of the first sealing ring in the first direction.

Description

Adapters, tube assemblies, glue gun tips and glue dispensing devices Technical Field

[0001] The present application relates to the field of glue coating machines, and in particular to an adapter, a pipe assembly, a glue coating gun head using the pipe assembly, and a glue coating device. Background Art

[0002] Currently, wide-width adapters for glue coating machines are typically made of stainless steel. In practice, due to the residual solidification of high-viscosity glue, the stainless steel adapters require cleaning after each use, which is time-consuming and labor-intensive, increasing maintenance frequency. Furthermore, residual solidified glue can impair the seal of the joint and shorten its lifespan. Furthermore, the integrated metal joints themselves are difficult to disassemble and assemble, making component replacement and maintenance difficult.

[0003] Therefore, there is a need to improve the wide-width adapter of the glue coating machine.

[0004] Summary of the Invention

[0005] In view of the above problems, the present application provides an adapter, a tube assembly, a glue gun head and a glue applying device, which can improve the sealing performance of the adapter and facilitate disassembly and assembly.

[0006] In a first aspect, the present application provides an adapter for connecting a first pipe member and a second pipe member, wherein the adapter includes: a pipe joint having a first accommodating portion and a second accommodating portion spaced apart along a first direction, the first accommodating portion being used to connect with the first pipe member, and the second accommodating portion being used to connect with the second pipe member; and a first sealing ring being arranged between the first accommodating portion and the second accommodating portion so that the first pipe member and the second pipe member can abut against the first sealing ring from both sides of the first sealing ring along the first direction.

[0007] In the technical solution of the embodiment of this application, by having the first and second pipe members abut the first sealing ring from both sides along the first direction, the first sealing ring can be used to separate the fluid flowing through the first pipe from the inner wall of the pipe joint. This improves the sealing performance of the adapter, reduces the maintenance frequency of the adapter, extends the service life of the adapter and the connected object, reduces spare parts loss, and saves costs.

[0008] In some embodiments, the first sealing ring includes a first portion and a second portion, the outer diameter of the first portion being smaller than the outer diameter of the second portion. The pipe joint is formed with a stepped portion, which includes a first surface, a second surface, and a third surface connected in sequence. The radial dimension of the third surface is larger than the radial dimension of the first surface, and the second portion abuts the second surface. By forming stepped portions on both the pipe joint and the first sealing ring, assembly can be performed by simply abutting the stepped portion of the first sealing ring against the stepped portion of the pipe joint. This allows for simple and reliable installation.

[0009] In some embodiments, the pipe joint further includes a first groove disposed at an end of the first sealing ring along the first direction, and the adapter further includes a second sealing ring disposed in the first groove and sleeved on an outer side of the first sealing ring for abutting against the first pipe member or the second pipe member along the first direction. This improves the sealing effect.

[0010] In some embodiments, the second sealing ring includes a base portion and a protrusion portion. The base portion is sleeved on the outside of the first sealing ring and is configured to abut the first or second pipe member along the first direction. The protrusion portion protrudes from the base portion in the first direction and has a different thickness than the base portion, and is configured to abut the first or second pipe member from the outer circumference. The protrusion abutting the first or second pipe member from the outer circumference can further improve the sealing effect.

[0011] In some embodiments, the first sealing ring is threadedly connected to the pipe joint. By threading the first sealing ring to the pipe joint, the first sealing ring can be installed inside the pipe joint by screwing in rather than pushing.

[0012] In some embodiments, the pipe joint is threadedly connected to the first pipe member and / or the second pipe member, thereby enabling the pipe joint to connect the threaded pipe members.

[0013] In some embodiments, the outer periphery of the pipe joint is polygonal in shape. By designing the outer shape of the pipe joint as polygonal, compared with the circular shape in the prior art, the convenience of assembly and disassembly can be improved, and the first pipe member and the second pipe member can be quickly and conveniently connected.

[0014] In some embodiments, the outer circumference of the pipe joint is provided with an anti-slip structure. By forming the outer circumference of the pipe joint into an anti-slip structure, the surface friction can be further increased, thereby further improving the convenience of assembly and disassembly, and making it more convenient and quick to connect the first pipe member and the second pipe member.

[0015] In some embodiments, the pipe joint includes a third sealing ring. A second groove is formed at at least one end of the pipe joint along the first direction. The third sealing ring is disposed in the second groove and is configured to be sleeved around the outer circumference of the first pipe member or the second pipe member. This improves the sealing effect at the end of the pipe joint.

[0016] In some embodiments, the first sealing ring is made of polytetrafluoroethylene. When the adapter is used in a glue gun head, the interior of the adapter becomes the delivery path for the glue. Therefore, from the perspective of chemical resistance, the first sealing ring, made of polytetrafluoroethylene, separates the glue entering the flat glue nozzle from the mixing hose from the pipe joint. This improves the chemical resistance of the first sealing ring, thereby enhancing its sealing performance. Furthermore, it reduces the maintenance frequency of the adapter, extends the service life of the adapter and the connected object, reduces spare parts loss, and saves costs.

[0017] In a second aspect, the present application provides a pipe assembly, wherein the pipe assembly includes: the adapter in the above-mentioned embodiment; a first pipe member, accommodated in the first accommodating portion; and a second pipe member, accommodated in the second accommodating portion, and the first pipe member and the second pipe member respectively abut the first sealing ring from both sides of the first direction.

[0018] In some embodiments, the first tube component is a flat-mouth component, which is an integrated structure and includes a flat glue nozzle for spraying glue and a connecting pipe for connecting to the pipe joint and at least a portion of which is engraved with external threads. The flat glue nozzle is located on the opposite side of the adapter of the connecting pipe, and the connecting pipe is threadedly connected to the pipe joint. The second tube component is a mixing glue pipe for inputting glue and at least a portion of which is engraved with external threads. The mixing glue pipe is threadedly connected to the pipe joint.

[0019] In a third aspect, the present application provides a glue gun head for spraying glue, wherein the glue gun head is equipped with the tube assembly in the above embodiment.

[0020] In a fourth aspect, the present application provides a gluing device, wherein the gluing device is equipped with the gluing gun head in the above embodiment.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the drawings without inventive effort. In addition, it should be noted that the drawings are not drawn according to the actual scale.

[0023] FIG1 is a schematic diagram of a pipe assembly disclosed in an embodiment of the present application;

[0024] FIG2 is a partial enlarged view of the tube assembly in FIG1 ;

[0025] FIG3 is a perspective schematic diagram of a pipe joint disclosed in an embodiment of the present application;

[0026] FIG4 is a perspective schematic diagram of a first sealing ring disclosed in an embodiment of the present application.

[0027] Explanation of Reference Numerals: Adapter 100, first pipe member (flat-mouth member) 101, second pipe member (mixed rubber hose) 102; Pipe joint (threaded pipe joint) 1, first sealing ring 2; First accommodating portion 11, second accommodating portion 12, first surface Q-1, second surface Q-2, third surface Q-3; First grooves 1S, 2S, second groove 3S, through-hole 20, first portion 21, second portion 22; Second sealing rings S-1, S-2, third sealing ring S-3;

[0028] Base S-1a, S-2a, protrusions S-1b, S-2b; flat nozzle 1011, connecting tube 1012. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including", "having" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0031] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0032] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0034] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0035] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0036] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0037] At present, glue coating machines are generally used to coat glue on cars. With the increasing demand for cars, especially new energy vehicles, the application of glue coating machines is also constantly expanding.

[0038] The inventors noted that due to the residual solidification of high-viscosity glue, the wide-width adapters used in current glue applicators require frequent cleaning, even leading to functional failure and forced replacement, resulting in increased labor and costs. Furthermore, because the wide-width adapters are a one-piece metal structure, they are difficult to disassemble and assemble, making component replacement and maintenance difficult.

[0039] To reduce the maintenance frequency of wide-width adapters, the inventors have discovered that the adapter's sealing performance can be improved. Specifically, a sealing ring is installed inside the pipe joint to isolate the glue from contacting the inner wall of the adapter. Especially in the case of threaded pipe joints, this can isolate the glue from contacting the internal threads of the adapter, protecting the threads. Furthermore, to improve assembly and disassembly ease, the adapter's external shape can be modified. Specifically, its outer periphery can be formed into a polygonal shape, such as a hexagonal shape, and its outer surface can be provided with a non-slip structure, such as a knurled surface.

[0040] Based on the above considerations, in order to solve the above problems, the inventors have conducted in-depth research and designed an adapter. By setting a sealing ring inside the pipe joint, the contact between the glue and the inner wall of the adapter can be effectively avoided. At the same time, by changing the outer shape of the adapter, compared with the existing threaded pipe joint with a circular shape, it is convenient to quickly connect the object components.

[0041] The adapter disclosed in the embodiments of this application can be used, but is not limited to, for gluing in automobiles, ships, aircraft, and the like, and can be applied to any viscous liquid. The use of the adapter, tube assembly, gluing gun head equipped with the tube assembly, and gluing device disclosed in this application can help reduce the maintenance frequency of the adapter, the gluing gun head, and the gluing device, extend the service life of the adapter, and improve work efficiency.

[0042] For the convenience of description, the following embodiments are described by taking an adapter 100 according to an embodiment of the present application as an example.

[0043] Referring to Figure 1, which is a schematic diagram of a pipe assembly disclosed in an embodiment of the present application, an adapter 100 is used to connect a first pipe member 101 and a second pipe member 102. The adapter 100 includes: a pipe joint 1 having a first accommodating portion 11 and a second accommodating portion 12 spaced apart along a first direction, the first accommodating portion 11 being configured to connect to the first pipe member 101, and the second accommodating portion 12 being configured to connect to the second pipe member 102; and a first sealing ring 2 disposed between the first accommodating portion 11 and the second accommodating portion 12, so that the first pipe member 101 and the second pipe member 102 can abut against the first sealing ring 2 from both sides along the first direction.

[0044] Here, the "first direction" refers to the longitudinal direction of the adapter 100, the first pipe member 101, the second pipe member 102, and the like, and is horizontal in the figure. Furthermore, as shown in FIG4 , the first sealing ring 2 has a through-hole 20 extending along the first direction (the longitudinal direction). In FIG1 , the first sealing ring 2 is installed by pressing it into the interior of the pipe joint 1 from one side.

[0045] By installing a first sealing ring 2 having a through-hole 20 extending along its length within the pipe joint 1, a delivery channel is formed by the through-hole 20 of the first sealing ring 2 and the through-holes of the first and second pipe members 101, 102. Therefore, when conveying fluids, particularly viscous liquids, through this delivery channel, the first sealing ring 2 can more effectively separate the conveyed fluid from the inner wall of the pipe joint 1. This improves sealing performance, reduces maintenance frequency of the adapter, extends the service life of the adapter and the connected object, reduces spare part loss, and saves costs.

[0046] According to some embodiments of the present application, as shown in Figure 4, the first sealing ring 2 includes a first part 21 and a second part 22, and the outer diameter of the first part 21 is smaller than the outer diameter of the second part 22. In addition, as shown in Figures 1 and 2, the pipe joint 1 is formed with a step portion, and the above-mentioned step portion includes a first surface Q-1, a second surface Q-2 and a third surface Q-3 connected in sequence, and the radial dimension of the third surface Q-3 is larger than the radial dimension of the first surface Q-1.

[0047] Correspondingly, as shown in FIG. 4 , the first sealing ring 2 is also formed in a stepped shape, ie, has a stepped portion formed by a first portion 21 and a second portion 22 that matches the stepped portion of the pipe joint 1 .

[0048] When assembling the adapter 100, when installing the first seal ring 2 inside the pipe joint 1, since both sides have stepped portions, it is sufficient to simply push the second portion 22 of the first seal ring 2 against the second surface Q-2 of the stepped portion of the pipe joint 1. This allows for simple and reliable installation.

[0049] According to some embodiments of the present application, as shown in Figures 1 and 2, the pipe joint 1 also includes first grooves 1S and 2S, which are respectively arranged at the two ends of the first sealing ring 2 along the above-mentioned first direction, and the adapter 100 also includes second sealing rings S-1 and S-2, which are respectively arranged in the first grooves 1S and 2S, and the second sealing rings S-1 and S-2 are respectively arranged on the outside of the first sealing ring 2, and are used to abut the first pipe member 101 and the second pipe member 102 along the above-mentioned first direction.

[0050] Specifically, as shown in Figures 1 and 2, first grooves 1S and 2S are provided on the inner wall of the pipe joint 1 at positions corresponding to the respective ends of the first sealing ring 2. Before the first sealing ring 2 is installed inside the pipe joint 1, the second sealing rings S-1 and S-2 are first inserted into the first grooves 1S and 2S, respectively. The first sealing ring 2 is then installed into the pipe joint 1 by pushing and inserting it into the second sealing rings S-1 and S-2.

[0051] Of course, the first groove may also be provided only at a position on the inner wall of the pipe joint 1 corresponding to one end of the first sealing ring 2. In this case, the second sealing ring installed in the first groove can abut against the first pipe member or the second pipe member along the first direction.

[0052] Whether the second sealing ring is provided at only one end or at both ends, the sealing effect can be further improved by the second sealing ring installed in the first groove abutting against the first pipe member and / or the second pipe member along the first direction.

[0053] According to some embodiments of the present application, the second sealing rings S-1 and S-2 may include base portions S-1a and S-2a and protrusions S-1b and S-2b. The base portions S-1a and S-2a are sleeved on the outside of the first sealing ring 2 and are used to abut the first pipe member 101 or the second pipe member 102 along the first direction. The protrusions S-1b and S-2b protrude from the base portions S-1a and S-2a in the first direction and have a different thickness from the base portions S-1a and S-2a, respectively, and are used to abut the first pipe member 101 or the second pipe member 102 from the outer side. By providing the protrusions to abut the first pipe member 101 or the second pipe member 102 from the outer side, the sealing effect can be further improved.

[0054] According to some embodiments of the present application, the first sealing ring 2 may be threadedly connected to the pipe joint 1 .

[0055] At this time, in order to facilitate screwing the first sealing ring 2 into the pipe joint 1, the pipe joint 1 is formed as a threaded pipe joint (sometimes also referred to as the threaded pipe joint 1 below), and threads are engraved on the outer peripheral surface of the first sealing ring 2 (for example, the first part 21 and / or the second part 22). When assembling the adapter 100, the first sealing ring 2 is screwed into the corresponding position in the threaded pipe joint 1, and the first sealing ring 2 is installed inside the threaded pipe joint 1 through a threaded connection.

[0056] By threading the first seal ring 2 to the pipe joint 1 , the first seal ring 2 can be installed in the pipe joint 1 by screwing rather than pressing.

[0057] According to some embodiments of the present application, the pipe joint 1 may be threadedly connected to the first pipe member 101 and / or the second pipe member 102 .

[0058] At this time, by forming the first receiving portion 11 and / or the second receiving portion 12 of the pipe joint 1 with internal threads, the first pipe member 101 and / or the second pipe member 102 , which are threaded pipes, can be threadedly connected.

[0059] According to some embodiments of the present application, the outer periphery of the pipe joint 1 is polygonal, such as a hexagonal shape or an octagonal shape.

[0060] By designing the outer shape of the pipe joint 1 to be polygonal, such as a hexagonal shape or an octagonal shape, compared with the circular shape in the prior art, the convenience of assembly and disassembly can be improved, and the first pipe member 101 and the second pipe member 102 can be quickly and conveniently connected.

[0061] According to some embodiments of the present application, an anti-slip structure may be provided on the outer peripheral surface of the pipe joint 1 , for example, formed as a knurled surface.

[0062] Knurling refers to the mechanical process of rolling patterns on the surface of a product. The surface with the rolled patterns is called the knurled surface.

[0063] By providing the outer peripheral surface of the pipe joint 1 with an anti-slip structure, such as a knurled surface, the surface friction can be further increased, thereby further improving the convenience of assembly and disassembly, and making it more convenient and quick to connect the first pipe member 101 and the second pipe member 102.

[0064] According to some embodiments of the present application, the pipe joint 1 includes a third sealing ring S-3, and a second groove 3S is formed at at least one end of the pipe joint 1 along the first direction. The third sealing ring S-3 is arranged in the second groove 3S, and the third sealing ring S-3 is used to be sleeved on the outer periphery of the first pipe member 101 or the second pipe member 102.

[0065] In Figure 1, a second groove 3S is formed at the left end of the pipe joint 1 along the first direction. A third sealing ring S-3 is installed in this second groove 3S. The third sealing ring S-3 is sleeved around the outer circumference of the first pipe member 101, further improving the sealing performance of the adapter 100. Of course, a second groove can also be provided at the right end of the pipe joint 1 along the first direction, and a third sealing ring can be installed in this second groove.

[0066] According to some embodiments of the present application, the material of the first sealing ring 2 includes polytetrafluoroethylene.

[0067] When the adapter 100 of this embodiment is applied to a glue gun head, since the interior of the adapter becomes a conveying passage for conveying the glue, from the perspective of chemical corrosion resistance, the material of the first sealing ring 2 adopts a material with high chemical corrosion resistance, and therefore, for example, a material including polytetrafluoroethylene (PTFE) is adopted.

[0068] Therefore, the glue entering the flat mouth component 101 (flat glue nozzle 1011) from the mixing rubber tube 102 is separated from the pipe joint 1 by the first sealing ring 2 made of a material with high chemical corrosion resistance, which can improve the chemical corrosion resistance of the first sealing ring 2 and thus improve its sealing performance. In addition, it can reduce the maintenance frequency of the adapter, increase the service life of the adapter and the flat mouth component, reduce spare parts loss, and save costs.

[0069] According to some embodiments of the present application, the present application also provides a pipe assembly, wherein the pipe assembly includes: the adapter 100 described in any of the above schemes; a first pipe member 101, accommodated in the first accommodating portion 11; and a second pipe member 102, accommodated in the second accommodating portion 12, and the first pipe member 101 and the second pipe member 102 respectively abut the first sealing ring 2 from both sides of the first direction.

[0070] According to some embodiments of the present application, the first tube component 101 may be a flat-mouth component, which is an integrated structure, including a flat glue nozzle 1011 for spraying glue and a connecting pipe 1012 for connecting to the pipe joint 1 and at least a portion of which is engraved with external threads. The flat glue nozzle 1011 is located on the opposite side of the adapter 100 of the connecting pipe 1012, and the connecting pipe 1012 is threadedly connected to the pipe joint 1. The second tube component 102 is a mixing rubber tube for inputting glue and at least a portion of which is engraved with external threads. The mixing rubber tube is threadedly connected to the pipe joint 1.

[0071] The flat nozzle member is a member having a flat nozzle, and the injection pressure is increased by forming the nozzle flat.

[0072] According to some embodiments of the present application, the present application also provides a glue gun head for spraying glue, and the above-mentioned glue gun head has a pipe assembly in which the first pipe component 101 is a flat-mouth component and the second pipe component 102 is a mixing pipe as described above.

[0073] According to some embodiments of the present application, the present application also provides a gluing device, which has a gluing gun head with the above-mentioned structure.

[0074] As described above, the adapter 100 of this embodiment can be used in a pipe assembly that connects a first pipe member 101 and a second pipe member 102. Furthermore, when the first pipe member 101 and the second pipe member 102 are flat-mouthed members or mixing hoses, the adapter 100 of this embodiment can also be used in a glue gun head, and similarly, can be used in a glue application device that uses a glue gun head.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An adapter for connecting a first pipe member and a second pipe member, wherein: The adapter comprises: A pipe joint, comprising a first accommodating portion and a second accommodating portion spaced apart in a first direction, wherein the first accommodating portion is used to connect with the first pipe member, and the second accommodating portion is used to connect with the second pipe member; and The first sealing ring is disposed between the first accommodating portion and the second accommodating portion so that the first pipe member and the second pipe member can abut against the first sealing ring from both sides of the first sealing ring along the first direction.

2. The adapter according to claim 1, wherein: The first sealing ring includes a first part and a second part, the outer diameter of the first part is smaller than the outer diameter of the second part, the pipe joint is formed with a step portion, the step portion includes a first surface, a second surface and a third surface connected in sequence, the radial dimension of the third surface is larger than the radial dimension of the first surface, and the second part abuts against the second surface.

3. The adapter according to claim 2, wherein: The pipe joint also includes a first groove, which is arranged at the end of the first sealing ring along the first direction. The adapter also includes a second sealing ring, which is arranged in the first groove. The second sealing ring is sleeved on the outer side of the first sealing ring and is used to abut the first pipe component or the second pipe component along the first direction.

4. The adapter according to claim 3, wherein: The second sealing ring includes a base and a protrusion. The base is sleeved on the outside of the first sealing ring and is used to abut the first tube member or the second tube member along the first direction. The protrusion protrudes from the base along the first direction and has a different thickness from the base, and is used to abut the first tube member or the second tube member from the outer peripheral side.

5. The adapter according to any one of claims 1 to 4, wherein: The first sealing ring is threadedly connected to the pipe joint.

6. The adapter according to any one of claims 1 to 5, wherein: The pipe joint is threadedly connected to the first pipe member and / or the second pipe member.

7. The adapter according to any one of claims 1 to 6, wherein: The outer circumference of the pipe joint is polygonal.

8. The adapter according to any one of claims 1 to 7, wherein: The outer peripheral surface of the pipe joint is provided with an anti-slip structure.

9. The adapter according to any one of claims 1 to 8, wherein: The pipe joint comprises a third sealing ring. A second groove is formed at at least one end of the pipe joint along the first direction. The third sealing ring is arranged in the second groove. The third sealing ring is used to be sleeved on the outer circumference of the first pipe component or the second pipe component.

10. The adapter according to any one of claims 1 to 9, wherein: The material of the first sealing ring includes polytetrafluoroethylene.

11. A pipe assembly, wherein: The tube assembly comprises: The adapter according to any one of claims 1 to 10; a first pipe member accommodated in the first accommodation portion; and The second pipe member is accommodated in the second accommodation portion, and the first pipe member and the second pipe member abut against the first sealing ring from both sides in the first direction respectively.

12. The tube assembly according to any one of claims 11, wherein: The first pipe component is a flat nozzle component, which is an integrated structure, including a flat nozzle for spraying glue and a connecting pipe for connecting with the pipe joint and at least a portion of which is engraved with an external thread, the flat nozzle is located on the opposite side of the adapter of the connecting pipe, the connecting pipe is threadedly connected to the pipe joint, and the second pipe component is for inputting glue and at least a portion of which is engraved with an external thread. A rubber mixing tube with external threads, wherein the rubber mixing tube is threadedly connected to the pipe joint.

13. A glue gun head for spraying glue, wherein: The glue gun head includes the tube assembly according to claim 12.

14. A glue coating device, wherein: The glue coating device comprises the glue coating gun head according to claim 13.

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