A pipe end connection and method of connecting the same

Abstract

The present application relates to a kind of pipe end connection joints, including end head body to be embedded in the inner end of pipe, end head body is fixedly provided with rotating body to be exposed on the outer end of pipe, at least one first connecting hole is provided on the outer circumferential surface of rotating body, the axis of first connecting hole is perpendicular to the tangent line of its corresponding contact point with rotating body generatrix.The present application fundamentally solves the problem of traditional joint connection loosening, deformation or even fracture, and the connection firmness and structural stability are improved in quality.At the same time, the embedded end head body cooperates with the exposed rotating body itself to form the plugging structure of pipe opening, without additional special plugging piece, the number of parts and assembly process are reduced, and the production and installation cost are reduced.The exposed part adopts regular rotating body structure, and it is easy to realize accurate centering and clamping in mechanical processing through general fixture such as three-jaw chuck, and the positioning error is extremely small, which is beneficial to the machining alignment of first connecting hole.

Description

Technical Field

[0001] This invention relates to a pipe end connection joint and its connection method, and relates to the technical field of pipe end connection fittings. Background Technology

[0002] Pipe fittings are widely used as a common basic component in many fields, such as furniture manufacturing. To meet different usage requirements, the ends of pipe fittings usually need to be connected to various functional accessories through connectors, such as trays for supporting items and support rods for supporting structures.

[0003] In the prior art, the connection between pipe fittings and the aforementioned accessories generally adopts an integral external connection joint structure. Specifically, the connection joint is completely exposed outside the pipe fitting, with one end fixedly connected to the outer periphery of the pipe fitting by bolts and nuts, and the other end provided with a connection hole for detachable connection with accessories such as trays and support rods.

[0004] However, this traditional integrated external connector structure has revealed many shortcomings in actual use: Firstly, in terms of structural stability and aesthetics, since the connection joint is completely exposed outside the pipe fitting, the connection node between the joint and the pipe fitting only relies on the contact area between the joint and the outer periphery of the pipe fitting to bear the force. The connection strength is limited. When subjected to lateral loads or impact loads, the connection node is prone to loosening, deformation or even breakage, resulting in an unstable, weak and unsightly overall structure.

[0005] Secondly, this structure cannot seal the pipe openings. In order to prevent debris from entering the pipe, special sealing components are required, which increases the number of parts and assembly steps and raises production costs.

[0006] Finally, the existing connectors are usually designed with irregular shapes, which makes it difficult to accurately position and clamp the workpiece when machining the connection holes for external accessories, and the alignment of the connection holes is difficult.

[0007] Based on this, in order to solve the above technical problems, this case proposes a pipe end connection joint and its connection method. Summary of the Invention

[0008] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a pipe end connection joint and a connection method thereof.

[0009] To solve the above-mentioned technical problems, the technical solution of the present invention is: a pipe end connection joint, including an end body for being embedded in the inner end of a pipe, a rotating body for being exposed on the outer end of the pipe, and at least one first connection hole provided on the outer peripheral surface of the rotating body, wherein the axis of the first connection hole is perpendicular to the tangent of its corresponding contact point with the generatrix of the rotating body.

[0010] Preferably, the rotating body is a hemispherical ball head body, and the axis of the first connecting hole passes through the center of the ball head body.

[0011] Preferably, the end body is provided with at least one second connection hole.

[0012] Preferably, the end body is a cylindrical component coaxial with the ball head body, and the axis of the second connecting hole is perpendicular to the axis of the end body.

[0013] Preferably, the first connecting hole is an internal threaded hole or a pin hole.

[0014] Preferably, the spherical surface of the ball head body is cut flat at the position corresponding to the first connecting hole to form a plane perpendicular to the axis of the first connecting hole.

[0015] Preferably, the number of the first connecting holes is one.

[0016] Preferably, there are several first connecting holes, and the axis of each first connecting hole passes through the center of the ball head body.

[0017] Preferably, the number of the first connecting holes is three, and the axis of the first connecting hole forms a 45° angle with the equatorial plane of the ball head body.

[0018] A method for connecting a pipe end connector includes the following steps: inserting the end body into one inner end of the pipe, and then fixing the end body and the pipe to each other with fasteners; the ball head body is exposed on the outer end of the pipe, and its first connection hole is used to connect the corresponding external accessories.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. Significantly improves connection strength and structural stability, while achieving integrated pipe end sealing: This invention abandons the traditional method of connecting joints that are completely exposed on the outside of the pipe and rely solely on the outer surface of the pipe for force. By completely embedding the end body into the inner end of the pipe, the contact area and engagement depth between the connecting joint and the pipe are greatly increased. This transforms the force on the connection node from "local surface force" to "uniform circumferential force," effectively resisting lateral loads, impact loads, and torsional moments. This fundamentally solves the problems of loosening, deformation, and even breakage in traditional joint connections, resulting in a qualitative improvement in connection strength and structural stability. Simultaneously, the embedded end body, together with the exposed rotating body, constitutes the sealing structure of the pipe end itself, eliminating the need for additional specialized sealing components, reducing the number of parts and assembly steps, and lowering production and installation costs.

[0020] 2. The exposed part adopts a regular rotating body structure, which makes it easy to achieve precise centering and clamping in machining using general-purpose fixtures such as three-jaw chucks. The positioning error is minimal, which is beneficial for the machining and alignment of the first connecting hole.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram illustrating the structure of an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of angle α and angle β of the first connecting hole in an embodiment of the present invention.

[0024] Figure 3 An exploded view of the usage state of a first connection hole.

[0025] Figure 4 This is a schematic diagram showing the usage state of a first connection hole.

[0026] Figure 5 An exploded view showing the usage status of the three first connection holes.

[0027] Figure 6 This is a schematic diagram showing the usage status of the three first connection holes.

[0028] Figure 7 This is a schematic diagram illustrating the usage state of another embodiment of the present invention.

[0029] In the figure: pipe fitting 1, end body 2, ball head body 3, first connecting hole 4, second connecting hole 5, ball equatorial plane 6, common plane 7, plane 8, tray 9, support rod 10, connecting bolt 11, connecting nut 12, connecting screw 13. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] like Figure 1-6 As shown, this embodiment provides a pipe end connector, including an end body 2 for being embedded in the inner end of a pipe 1. A rotating body is fixedly provided on the end body for being exposed on the outer end of the pipe. At least one first connecting hole 4 is provided on the outer peripheral surface of the rotating body. The axis of the first connecting hole is perpendicular to the tangent of its corresponding contact point with the generatrix of the rotating body.

[0034] In this embodiment of the invention, the rotating body adopts a hemispherical ball head body 3, and at least one first connecting hole 4 is provided on the spherical surface of the ball head body, the axis of the first connecting hole passing through the center of the ball head body.

[0035] This invention innovatively uses a spherical surface as the carrier for the connecting holes, and strictly ensures that the axis of all first connecting holes passes through the center of the ball head body. Since the end body and the inner end of the pipe are coaxially assembled, the center of the ball head body naturally coincides with the axis of the pipe opening. When machining the connecting holes, only the center of the ball head body needs to be used as the sole machining reference to ensure that the axis of the connecting hole at any position can accurately pass through the axis of the pipe opening, completely eliminating the problems of difficult alignment and large errors caused by inconsistent references in traditional irregular-shaped joints. This design greatly simplifies the machining process, reduces the requirements for machining equipment and operators, significantly improves production efficiency and product qualification rate, and simultaneously ensures the installation accuracy and uniform stress distribution of subsequent external accessories.

[0036] The exposed portion of this invention features a smooth, continuous spherical design, completely eliminating the sharp edges, burrs, and other sharp corners present in traditional irregularly shaped connectors. This fundamentally avoids the safety hazards of cuts and scratches to operators during handling, installation, and use, significantly improving safety. Simultaneously, the hemispherical head body transitions naturally and smoothly with the pipe end, without noticeable seams. The overall design is simple and aesthetically pleasing, blending seamlessly with the design styles of various furniture, display racks, and other products, significantly enhancing the overall quality and market competitiveness of the product.

[0037] The spherical structure of the ball head body of this invention has excellent stress dispersion performance. When the external attachment is subjected to external force, the load can be evenly transmitted to the entire connection joint and pipe fitting through the spherical surface, avoiding local fatigue damage caused by stress concentration in traditional irregular joints, and effectively extending the service life of the connection joint and the overall structure.

[0038] In this embodiment of the invention, the end body is provided with at least one second connecting hole 5, the second connecting hole penetrates the end body, and the second connecting hole is a through hole with a smooth inner wall, which is used to be adapted to be installed with two oppositely arranged mounting through holes on the end side of the pipe fitting.

[0039] In this embodiment of the invention, the end body is a cylindrical component coaxial with the ball head body, and the axis of the second connecting hole is perpendicular to the axis of the end body.

[0040] In embodiments of the present invention, such as Figure 2 As shown, the angle between the axis of the first connecting hole and the equatorial plane 6 of the ball head body is α, and the common plane 7 where the axis of the pipe / connecting joint and the axis of the second connecting hole are located forms an angle β with the axis of the first connecting hole.

[0041] In this embodiment of the invention, the first connecting hole is an internal threaded hole or a pin hole.

[0042] In this embodiment of the invention, the spherical surface of the ball head body is cut flat at the position corresponding to the first connecting hole to form a plane 8 perpendicular to the axis of the first connecting hole.

[0043] In this embodiment of the invention, the outer diameter of the ball head body is equal to the outer diameter of the pipe fitting, and the outer diameter of the end body is equal to the inner diameter of the pipe fitting.

[0044] A method for connecting a pipe fitting end connector includes the following steps: inserting the end body into one inner end of the pipe fitting, exposing the ball head body on the outer end of the pipe fitting, and using its first connection hole for connecting a corresponding external accessory.

[0045] In this embodiment of the invention, the end body and the pipe are further fixedly connected by fasteners.

[0046] In this embodiment of the invention, the number of the first connecting holes is one, such as... Figure 3 , 4 As shown, the end body is coaxially inserted into one of the inner ends of the pipe fitting. Connecting bolts 11 (fasteners) are passed sequentially through the mounting through hole and the second connecting hole on the pipe fitting, and then the connecting nut 12 is tightened to secure the end body to the pipe fitting. The ball head body is exposed on the outer end of the pipe fitting, and its first connecting hole is screwed to the connecting screw 13 of the tray 9 (external accessory). In this embodiment, the relative positional relationship between the first and second connecting holes can be adjusted during manufacturing by changing the parameters of angle α and angle β to suit specific installation requirements.

[0047] Alternatively, there may be a plurality of the first connecting holes, specifically, for example, three first connecting holes, which are evenly distributed around the circumference, and the axes of the first connecting holes form a 45° angle with the equatorial plane of the ball head body. Figure 5 , 6 As shown, the end body is coaxially embedded into one of the inner ends of the pipe fitting. After the connecting bolts (fasteners) pass through the mounting through holes and the second connecting holes on the pipe fitting in sequence, the connecting nuts are locked to fix the end body and the pipe fitting. The ball head body is exposed on the outer end of the pipe fitting. Its three first connecting holes are respectively screwed to the connecting screws of the three support rods 10 (external accessories) to form a support leg structure.

[0048] In another embodiment of the invention, such as Figure 7 As shown, the second connecting hole penetrates the end body and is an internally threaded hole, which is used to be adapted to the single mounting through hole on the end side of the pipe fitting for installation. No additional mounting through hole is provided on the side wall of the pipe fitting directly opposite the single mounting through hole.

[0049] During installation, set screw 14 is required. First, insert the end body coaxially into one of the inner ends of the pipe fitting. Then, screw the set screw (fastener) into the threaded second connection hole so that the set screw is pressed against the inner wall of the pipe fitting opposite to the single mounting through hole, thereby fixing the end body to the pipe fitting.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A pipe end connector, characterized in that: The device includes an end body for embedding into the inner end of a pipe fitting, and a rotating body for exposing the outer end of the pipe fitting is fixedly disposed on the end body. At least one first connecting hole is provided on the outer peripheral surface of the rotating body, and the axis of the first connecting hole is perpendicular to the tangent of the corresponding contact point with the generatrix of the rotating body.

2. The pipe end connection joint according to claim 1, characterized in that: The rotating body is a hemispherical ball head body, and the axis of the first connecting hole passes through the center of the ball head body.

3. The pipe end connection joint according to claim 2, characterized in that: The end body is provided with at least one second connection hole.

4. The pipe end connection joint according to claim 3, characterized in that: The end body is a cylindrical component coaxial with the ball head body, and the axis of the second connecting hole is perpendicular to the axis of the end body.

5. The pipe end connection joint according to claim 2, characterized in that: The first connecting hole is an internal threaded hole or a pin hole.

6. The pipe end connection joint according to claim 2, characterized in that: The spherical surface of the ball head body is cut flat at the position corresponding to the first connecting hole to form a plane perpendicular to the axis of the first connecting hole.

7. The pipe end connection joint according to claim 2, characterized in that: The number of the first connecting holes is one.

8. The pipe end connection joint according to claim 2, characterized in that: The number of the first connecting holes is several, and the axis of each first connecting hole passes through the center of the ball head body.

9. The pipe end connection joint according to claim 8, characterized in that: The number of the first connecting holes is three, and the axis of the first connecting hole forms a 45° angle with the equatorial plane of the ball head body.

10. A connection method for a pipe end connector as described in any one of claims 1-9, characterized in that, Includes the following steps: The end body is inserted into one of the inner ends of the pipe fitting, and the end body and the pipe fitting are then fixedly connected by fasteners. The ball head body is exposed on the outer end of the pipe fitting, and its first connection hole is used to connect the corresponding external accessories.

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