Metal pipe cold pressing joint and assembly thereof

Abstract

The utility model discloses a metal pipe cold pressing joint and an assembly thereof, the metal pipe cold pressing joint comprises a pressing connection end and a screw connection end, the inner wall of the pressing connection end is provided with at least one engaging tooth, and the engaging tooth extends along the circumferential direction of the pressing connection end and is used for being engaged on the outer circumferential surface of a pipe fitting to be connected when the pipe fitting to be connected is extruded into the pressing connection end through cold pressing; the screw joint end is communicated with the crimping end, and the outer wall and / or the inner wall of the screw joint end are / is provided with threads used for being in threaded connection with a target component. According to the cold-pressing joint of the metal pipe, the combined structure of the pressing connection end and the screw connection end is adopted, the meshing teeth are arranged on the inner wall of the pressing connection end, the outer circumferential face of the pipe fitting to be connected can be firmly meshed in the cold-pressing connection process, the sealing performance and stability of connection are ensured, threads do not need to be machined on the pipe fitting to be connected, and therefore the machining procedure of the pipe fitting to be connected is simplified, and the machining efficiency is improved. The production cost is reduced; the threaded connection mode between the threaded connection end and the target component is reserved, and convenience and reliability of connection between the threaded connection end and the target component are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe joint, especially to a metal pipe cold pressure joint and its assembly. BACKGROUND

[0002] The metal pipe joint is a component for connecting metal pipes, and is commonly used in a pipeline system. In the related art, the metal pipe joint has a threaded structure at both ends, and a corresponding pipe piece or target component also has a threaded structure matching the threaded structure of the metal pipe joint. When connected, the pipe piece is threadedly connected to one end of the metal pipe joint, and the target component is threadedly connected to the other end of the metal pipe joint.

[0003] This threaded connection method requires machining threads on the pipe piece, which increases the machining process and cost of the pipe piece. In addition, the machining process involves clamping the pipe piece with a clamp, which can easily damage the surface layer of the pipe piece, especially the pipe piece with a plating layer on the surface. The surface damage requires subsequent repair processes, further increasing the process and cost. SUMMARY

[0004] The utility model aims to at least solve one of the technical problems in the related art. To this end, the utility model aims to provide a metal pipe cold pressure joint and its assembly.

[0005] To achieve the above-mentioned purpose, on the one hand, the metal pipe cold pressure joint according to the utility model embodiment comprises:

[0006] The pressure connection end has at least one tooth on the inner wall, which extends along the circumference of the pressure connection end and tightly bites on the outer circumferential surface of the pipe piece when the pipe piece is cold-pressed into the pressure connection end.

[0007] The screw connection end is connected to the pressure connection end, and the outer wall and / or the inner wall of the screw connection end is provided with threads for threadedly connecting with the target component.

[0008] The metal pipe cold pressure joint according to the utility model embodiment adopts a combined structure of the pressure connection end and the screw connection end. On the one hand, the tooth on the inner wall of the pressure connection end can firmly bite the outer circumferential surface of the pipe piece during cold-pressing connection, ensuring the sealing and stability of the connection, without the need to machine threads on the pipe piece, thereby simplifying the machining process of the pipe piece and reducing the production cost. On the other hand, since the cold-pressing connection method is adopted, the damage to the surface of the pipe piece caused by the clamp in the traditional threaded machining process is avoided, which is particularly suitable for pipe pieces with a plating layer on the surface, effectively protecting the surface quality and reducing the subsequent repair process and cost. At the same time, the screw connection end retains the threaded connection method with the target component, ensuring the convenience and reliability of the connection between the screw connection end and the target component.

[0009] In addition, the metal pipe cold pressure joint according to the above-mentioned embodiments of the present application can further have the following additional technical features.

[0010] According to an embodiment of the present application, the toothed jaws are arranged along the axial direction of the pressure joint end.

[0011] According to an embodiment of the present application, the toothed jaws extend along the circumferential direction of the pressure joint end to form a ring shape.

[0012] According to an embodiment of the present application, the cross section of the toothed jaws is triangular or trapezoidal.

[0013] According to an embodiment of the present application, the inner diameter of the pressure joint end is larger than the inner diameter of the screw joint end, so that an inner step surface is formed at the connection between the pressure joint end and the screw joint end.

[0014] According to an embodiment of the present application, the outer diameter of the pressure joint end is larger than the outer diameter of the screw joint end, so that an outer step surface is formed at the connection between the pressure joint end and the screw joint end.

[0015] According to an embodiment of the present application, the axis of the pressure joint end coincides with or is perpendicular to the axis of the screw joint end.

[0016] On the other hand, the metal pipe cold pressure joint assembly according to the embodiments of the present application comprises:

[0017] The metal pipe cold pressure joint as described above, the inner diameter of the pressure joint end is larger than the inner diameter of the screw joint end, so that an inner step surface is formed at the connection between the pressure joint end and the screw joint end.

[0018] A sealing gasket is arranged on the inner step surface, and is pressed and sealed by the end surface of the pipe to be connected when the pipe to be connected is cold pressed and extruded into the pressure joint end.

[0019] The metal pipe cold pressure joint assembly according to the embodiments of the present application has the above-mentioned metal pipe cold pressure joint, so that the cold pressure connection between the pipe to be connected can be realized, the machining process of the pipe to be connected is simplified, and the production cost is reduced. In addition, the sealing gasket is arranged on the inner step surface of the pressure joint end, and the sealing gasket is pressed and sealed by the end surface of the pipe to be connected when the pipe to be connected is cold pressed and extruded into the pressure joint end. In this way, the sealing property of the cold pressure connection is significantly improved.

[0020] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structure shown in these drawings without creative labor.

[0022] Figure 1 is a structure schematic view of one perspective of the metal pipe cold pressure joint embodiment of the present application;

[0023] Figure 2 is a structure schematic view of another perspective of the metal pipe cold pressure joint embodiment of the present application;

[0024] Figure 3 is a sectional view of the metal pipe cold pressure joint embodiment of the present application;

[0025] Figure 4 is a sectional view of another embodiment of the metal pipe cold pressure joint of the present application;

[0026] Figure 5 is a sectional view of the metal pipe cold pressure joint assembly embodiment of the present application;

[0027] Figure 6 is a schematic view of the metal pipe cold pressure joint assembly of the present application when assembled with the pipe piece to be connected and the target component.

[0028] Reference signs:

[0029] 100, metal pipe cold pressure joint;

[0030] 10, pressure joint end;

[0031] 101, biting tooth;

[0032] S101, inner step surface;

[0033] S102, outer step surface;

[0034] 20, screw joint end;

[0035] 201, external thread;

[0036] 202, internal thread;

[0037] 30, sealing gasket;

[0038] 200, pipe piece to be connected;

[0039] 300, target component.

[0040] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0041] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by way of examples are intended to explain the present application, and should not be understood as limiting the present application, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor fall within the scope of protection of the present application.

[0042] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0044] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature, can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature "on", "above" and "upper surface of" second feature includes that first feature is directly above and obliquely above second feature, or only indicates that horizontal height of first feature is higher than second feature. First feature "under", "below" and "under surface of" second feature includes that first feature is directly below and obliquely below second feature, or only indicates that horizontal height of first feature is less than second feature.

[0046] The metal pipe cold pressure joint 100 and components thereof are described in detail below with reference to the drawings.

[0047] Referring to Figures 1 to 4 and Figure 6 , the metal pipe cold pressure joint 100 provided by the utility model embodiment comprises a pressure joint end 10 and a screw joint end 20.

[0048] Specifically, the inner wall of the pressure joint end 10 is provided with at least one tooth 101 extending along the circumference of the pressure joint end 10, so as to tightly bite on the outer circumferential surface of the pipe to be connected 200 when the pipe to be connected 200 is cold pressed and extruded into the pressure joint end 10.

[0049] It can be understood that the tooth 101 is a toothed structure protruding radially inward from the inner wall of the pressure joint end 10, and when the pipe to be connected 200 or the metal pipe cold pressure joint 100 is subjected to axial pressure by a cold extrusion device, the tooth 101 will be embedded in the outer circumferential surface of the pipe to be connected 200 when the pipe to be connected 200 is extruded into the pressure joint end 10, forming a firm mechanical connection.

[0050] The screw joint end 20 is in communication with the pressure joint end 10, and the outer wall and / or the inner wall of the screw joint end 20 is provided with a thread for threadedly connecting with a target component 300. Preferably, the screw joint end 20 and the pressure joint end 10 are integrated structures, and a communication channel is formed between them to ensure smooth flow of fluid.

[0051] The screw joint end 20 can be provided with threads on the outer wall and / or the inner wall according to actual application requirements, for example, in Figure 1 the example, the outer wall of the screw joint end 20 is provided with external threads 201, and the inner wall of the screw joint end 20 is provided with internal threads 202. This flexible thread arrangement enables the joint to adapt to different types of target components 300, enhancing the versatility of the product. The external threads 201 are designed to be suitable for connecting with the target component 300 having internal threads 202, and the internal threads 202 are designed to be suitable for connecting with the target component 300 having external threads 201.

[0052] It can be understood that the pipe to be connected 200 can be but is not limited to various metal pipes such as copper pipes, stainless steel pipes, steel pipes, carbon steel pipes, etc., and the target component 300 can be but is not limited to a faucet, a valve, a flowmeter, a pressure gauge, a metal pipe, etc. The metal pipe cold pressure connector 100 is made of metal materials such as copper, steel, stainless steel, carbon steel, etc.

[0053] According to the metal pipe cold pressure connector 100 provided in the embodiments of the present application, the combination structure of the crimping end 10 and the screwing end 20 is adopted. On the one hand, the biting teeth 101 arranged on the inner wall of the crimping end 10 can firmly bite the outer circumferential surface of the pipe to be connected 200 in the cold pressure connection process, ensuring the sealing property and stability of the connection, and without the need of machining threads on the pipe to be connected 200, thereby simplifying the machining process of the pipe to be connected 200 and reducing the production cost. On the other hand, since the cold pressure connection mode is adopted, the damage to the surface of the pipe to be connected 200 caused by the clamp in the traditional thread machining process is avoided, and the metal pipe cold pressure connector 100 is particularly suitable for pipe fittings with a plating layer on the surface, effectively protecting the surface quality and reducing the subsequent repair process and cost. At the same time, the screwing end 20 retains the thread connection mode with the target component 300, ensuring the convenience and reliability of the connection between the screwing end 20 and the target component 300.

[0054] In some embodiments of the present application, the biting teeth 101 are a plurality of, and the plurality of biting teeth 101 are arranged at intervals along the axial direction of the crimping end 10. Exemplarily, the biting teeth 101 are two, and the two biting teeth 101 are arranged at intervals along the axial direction of the crimping end 10 on the inner wall of the crimping end 10.

[0055] In the present embodiment, the design of the plurality of biting teeth 101 not only improves the reliability of the connection, but also significantly improves the sealing performance.

[0056] Preferably, the interval between the two adjacent biting teeth 101 is in the range of 1.0-5.0 mm. The interval design not only ensures that each biting tooth 101 can independently play a role, but also avoids the stress interference between the adjacent biting teeth 101.

[0057] In some embodiments of the present application, the biting teeth 101 extend in a ring shape along the circumferential direction of the crimping end 10.

[0058] In the present embodiment, the biting teeth 101 adopt a ring structure, which provides a 360-degree uninterrupted biting force, ensuring the uniformity and reliability of the connection strength. Moreover, the continuous ring-shaped sealing surface effectively prevents medium leakage, significantly improving the sealing property. In addition, the ring structure makes the radial deformation in the crimping process more uniform, reduces the local stress concentration, and prolongs the service life of the connector.

[0059] Preferably, the cross section of the bite 101 is triangular or trapezoidal. The bite 101 with a triangular cross section has excellent cutting performance, and can quickly cut into the pipe wall during the crimping process to form a reliable mechanical lock. The bite 101 with a trapezoidal cross section has a larger contact area, which can provide better support, and is particularly suitable for occasions that bear larger radial forces; the flat top structure can reduce damage to the pipe and prolong the fatigue life of the connection part. In practical applications, it is found that the bite 101 with a triangular cross section is more suitable for connecting thin-walled pipes, and the sharp edges can achieve effective biting under smaller crimping force; and the bite 101 with a trapezoidal cross section is more suitable for connecting thick-walled pipes, and the larger support area can bear higher working pressure. Both cross-sectional shapes can form a reliable mechanical connection and sealing interface during cold pressing.

[0060] In some embodiments of the utility model, the inner diameter of the crimping end 10 is larger than the inner diameter of the screwing end 20, so that an inner step surface S101 is formed at the connection between the crimping end 10 and the screwing end 20, and the end surface of the connected pipe 200 can be attached to the inner step surface S101 to play a limiting and sealing role.

[0061] In the embodiment, the inner step surface S101 plays a role in providing axial positioning and sealing. During the process of crimping and extruding the connected pipe 200 into the crimping end 10, whether the connected pipe 200 reaches the inner step surface S101 is used to determine whether the installation is in place, effectively avoiding the problems of insufficient or excessive assembly depth. The connected pipe 200 is blocked by the inner step surface S101 and cannot move axially, and the accurate biting position of the bite 101 is also ensured. In addition, the attached state between the end surface of the connected pipe 200 and the inner step surface S101 during the crimping process ensures the sealing performance of the connected pipe 200 after being connected to the joint. Especially, when a flexible sealing element (such as a gasket, a sealing ring, etc.) is arranged on the inner step surface S101, the sealing performance between the connected pipe 200 and the joint can be significantly improved.

[0062] In some embodiments of the utility model, the outer diameter of the crimping end 10 is larger than the outer diameter of the screwing end 20, so that an outer step surface S102 is formed at the connection between the crimping end 10 and the screwing end 20.

[0063] In the embodiment, the outer step surface S102 can provide axial positioning and sealing for the target component 300. When the target component 300 is connected to the outer thread 201 of the threaded end, the end of the target component 300 is abutted on the outer step surface S102, which can be connected in place, achieve axial limiting, and ensure the reliability of the connection. At the same time, a flexible sealing element (such as a gasket, a sealing ring, etc.) can also be arranged on the outer step surface S102, so that the sealing performance between the target component 300 and the joint can also be significantly improved.

[0064] It can be understood that the axis of the crimping end 10 coincides with or is perpendicular to the axis of the screwing end 20. That is, the metal pipe cold crimping joint 100 can be a direct head (as shown in Figures 1 to 3 ), or a 90° bending joint (as shown in Figure 4 ).

[0065] Referring to Figures 5 to 6 , according to the metal pipe cold crimping joint assembly of the embodiments of the present application, the metal pipe cold crimping joint 100 and the sealing gasket 30 as described in the above embodiments are included, the inner diameter of the crimping end 10 is greater than the inner diameter of the screwing end 20, so that the connection part of the crimping end 10 and the screwing end 20 is formed with an inner step surface S101. The sealing gasket 300 is arranged on the inner step surface S101, so as to be pressed and sealed by the end surface of the connected pipe 200 when the connected pipe 200 is cold pressed and extruded into the crimping end 10.

[0066] According to the metal pipe cold crimping joint assembly of the embodiments of the present application, the above metal pipe cold crimping joint 100 is included, so that the cold pressing connection between the connected pipe 200 can be realized, the processing procedure of the connected pipe 200 is simplified, and the production cost is reduced. In addition, the sealing gasket 300 is arranged on the inner step surface S101 of the crimping end 10, and the sealing gasket 300 is pressed and sealed by the end surface of the connected pipe 200 when the connected pipe 200 is cold pressed and extruded into the crimping end 10. In this way, the sealing property of the cold pressing connection is significantly improved.

[0067] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the different embodiments or examples described in the present application and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0068] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A cold-pressed metal pipe fitting, characterized in that, include: The crimping end has at least one bite on its inner wall, which extends circumferentially along the crimping end to bite the outer circumferential surface of the connected component when the connected component is cold-pressed into the crimping end. A threaded end is connected to the crimped end, and the outer and / or inner walls of the threaded end are provided with threads for threaded connection with the target component.

2. The cold-pressed metal tube fitting according to claim 1, characterized in that, The bite teeth are multiple, and the multiple bite teeth are arranged at intervals along the axial direction of the crimping end.

3. The cold-pressed metal tube fitting according to claim 1, characterized in that, The bite teeth extend circumferentially along the crimping end to form a ring.

4. The cold-pressed metal tube fitting according to claim 1, characterized in that, The cross-section of the biting tooth is triangular or trapezoidal.

5. The cold-pressed metal tube fitting according to claim 1, characterized in that, The inner diameter of the crimp end is larger than the inner diameter of the screw end, so that an inner stepped surface is formed at the connection between the crimp end and the screw end.

6. The cold-pressed metal tube fitting according to claim 1, characterized in that, The outer diameter of the crimp end is larger than the outer diameter of the screw end, so that an outer stepped surface is formed at the connection between the crimp end and the screw end.

7. The cold-pressed metal tube fitting according to claim 1, characterized in that, The axis of the crimp end coincides with or is perpendicular to the axis of the screw end.

8. A cold-pressed metal pipe fitting assembly, characterized in that, include: The cold-pressed metal tube fitting as described in any one of claims 1, 2, 3, 4, 6, and 7, wherein the inner diameter of the crimping end is larger than the inner diameter of the threaded end, so that an inner stepped surface is formed at the connection between the crimping end and the threaded end; A sealing gasket is disposed on the inner stepped surface to be pressed and sealed by the end face of the connected component when the connected component is cold-pressed into the crimping end.

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