Loose joint elbow
By designing the limit structure of the socket projection and radial projection block on the elbow, combining the step surface and internal thread, the problem of difficulty in inserting and slipping of the nut is solved, achieving a more convenient and stable elbow. Elbow connection.
Patent Information
- Application Number
- CN202420214241.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-01-30
AI Technical Summary
When the existing elbow is in the shape of an elbow, the nut is difficult to fit in and it is easy to slip off after installation, especially when connected to the rubber pipe.
Design a structure including a right-angle curved joint and a nut. The axial end of the nut is equipped with a socket projection, which is stamped inwardly through a special mold and bent to the limit of the radial projection block of the joint to ensure a stable connection. Step surfaces and internal threads are also provided on the outer peripheral wall of the joint for easy installation and sealing.
It realizes more convenient installation and stable connection of nuts on right-angle curved joints, avoids slippage, and improves the stability and sealing of overall performance.
Smart Images
Figure CN222277832U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pipeline connectors, in particular to a flexible elbow. Background Art
[0002] Union joints are now widely used in pipeline connections. They can be widely used in pipelines of different diameters, and can also be used in water meters and valves. They are a common pipeline connector that can be easily installed and disassembled. They have the advantages of wide application, easy installation and disassembly, quick connection, and easy management and maintenance. However, some of the joints of existing union joints are in the shape of elbows, which makes it difficult for the nut to be inserted into the joint, especially at the elbows, where the nut is difficult to insert, making the installation between the two very troublesome. In particular, some elbow-shaped joints are usually provided with limit blocks when connected to rubber pipes, which makes it more difficult for the nut to be inserted into the joint, and the union elbow after installation sometimes causes the nut to slip off the joint. Utility Model Content
[0003] The utility model aims to overcome the shortcomings of the prior art and provide a flexible elbow which is convenient for sleeve connection and can ensure that a nut is not easy to slip off the joint.
[0004] The purpose of the utility model is achieved through the following technical solutions. The flexible elbow comprises a nut and a joint, the joint is a right-angle elbow, one end of the outer peripheral wall of the joint is provided with a connecting unit for connecting a rubber tube, the other end of the outer peripheral wall of the joint is provided with a circle of radial protrusion blocks, one axial end of the nut is provided with a circle of sleeve protrusions, the inner diameter of the sleeve protrusions is larger than the outer diameter of the radial protrusion blocks, the nut is inserted into the radial protrusion block of the joint through the sleeve protrusion, and the sleeve protrusion is stamped inwardly and bent by a special mold and is limited against one end face of the radial protrusion block.
[0005] The beneficial effects of the utility model are as follows: compared with the prior art, a sleeve protrusion is provided at one end of the nut, and the sleeve protrusion is stamped and bent by a special mold to abut against one end face of the radial protrusion block of the joint for limiting position, so that it is more convenient to sleeve on a right-angled joint, and can ensure that the nut is not easy to slip off the joint, and the stability performance is better.
[0006] Preferably, the sleeve protrusion is integrally formed on one axial end of the nut and is inclined inward along the axial core line of the nut; this improves the connection performance between the sleeve protrusion and the nut, and no cracks are generated between the sleeve protrusion and the nut due to the stamping and bending of the sleeve protrusion. The sleeve protrusion is distributed in an inclined shape, which is convenient for the stamping and bending of the sleeve protrusion by a special mold.
[0007] Preferably, the sleeve joint protrusion includes a circle of flange and a connecting block, the flange and the connecting block are integrally formed, the connecting block is integrally formed on one axial end of the nut, the flange is inclined inward along the axial core line of the nut, the connecting block is distributed in parallel along the axial core line of the nut, and the inner diameter of a circle of the flange is larger than the outer diameter of the radial protrusion block; through the setting of the above structure, the special mold only needs to stamp and bend a circle of flange to achieve the limiting position of the sleeve joint protrusion and one end face of the radial protrusion block of the joint, which is not only convenient for stamping and bending, but also has stable structural performance.
[0008] Preferably, the outer diameter of the other end of the outer peripheral wall of the joint is smaller than the outer diameter of the joint, and the outer peripheral wall of the joint at this end forms a step surface with the radial protrusion block, and a sealing ring is installed and limited by the step surface; the installation of the sealing ring is facilitated by setting the step surface.
[0009] Preferably, the inner wall of the nut is provided with an internal thread, which is connected to the pipeline through the internal thread, and the inner diameter of the internal thread is larger than the outer diameter of the radial protrusion block; this facilitates the connection between the nut and the pipeline, and also facilitates the insertion between the joint and the nut.
[0010] Preferably, the connecting unit includes a connecting ring and a transition ring arranged on the outer peripheral wall of the joint, and the connecting rings are provided in plurality and are distributed in sequence at equal intervals along the axial direction of the joint, the transition ring is located at the connecting ring at the end, and a limit block is also provided on the outer peripheral wall of the joint at the transition ring; through the arrangement of the above-mentioned structure, the connecting unit of the rubber tube and the joint is more convenient during the connection process, and the sealing and stability after the connection are also better, and the limit block can be well limited.
[0011] Preferably, the connecting ring and the transition ring are both in the shape of inverted cone teeth, and the outer diameter of the transition ring is larger than the outer diameter of the connecting ring; this facilitates the insertion of the rubber tube into the connecting unit of the joint and the plug-in connection between the two. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the flexible elbow of the utility model before assembly.
[0013] Figure 2 It is a structural schematic diagram of the assembled flexible elbow of the utility model.
[0014] Figure 3 yes Figure 1 A is an enlarged structural diagram of FIG.
[0015] The numbers in the accompanying drawings are: 1, nut; 2, joint; 3, connecting unit; 4, sleeve protrusion; 11, internal thread; 21, radial protrusion block; 22, step surface; 31, connecting ring; 32, transition ring; 33, limit block; 41, flange; 42, connecting block. DETAILED DESCRIPTION
[0016] The following is a detailed introduction to the utility model in conjunction with the accompanying drawings: Figures 1 to 3 As shown, the utility model includes a nut 1 and a joint 2, the joint 2 is a right-angle bend, one end of the outer peripheral wall of the joint 2 is provided with a connecting unit 3 for connecting the rubber tube, the other end of the outer peripheral wall of the joint 2 is provided with a circle of radial protrusion blocks 21, and one axial end of the nut 1 is provided with a circle of sleeve protrusions 4, the inner diameter of the sleeve protrusions 4 is larger than the outer diameter of the radial protrusion block 21, the nut 1 is inserted into the radial protrusion block 21 of the joint 2 through the sleeve protrusion 4, and the sleeve protrusion 4 is stamped and bent inwardly through a special mold and is limited against one end surface of the radial protrusion block 21.
[0017] The sleeve protrusion 4 is integrally formed on one axial end of the nut 1 and is inclined inwardly along the axial core line of the nut 1 .
[0018] The sleeve protrusion 4 includes a circle of flanged edges 41 and a connecting block 42. The flanged edges 41 and the connecting block 42 are integrally formed. The connecting block 42 is integrally formed on one axial end of the nut 1. The flanged edges 41 are inclined inward along the axial core line of the nut 1. The connecting blocks 42 are distributed in parallel along the axial core line of the nut 1, and the inner diameter of the circle of flanged edges 41 is larger than the outer diameter of the radial protrusion block 21.
[0019] The outer diameter of the other end of the outer circumferential wall of the joint 2 is smaller than the outer diameter of the joint 2 , and the outer circumferential wall of the joint 2 at this end and the radial protrusion block 21 form a step surface 22 , and a sealing ring is installed and limited through the step surface 22 .
[0020] An inner wall of the nut 1 is provided with an internal thread 11 , which is connected to a pipeline via the internal thread 11 , and an inner diameter of the internal thread 11 is greater than an outer diameter of the radial protrusion 22 .
[0021] The connecting unit 3 includes a connecting ring 31 and a transition ring 32 arranged on the outer peripheral wall of the joint 2. There are several connecting rings 31 and they are distributed in sequence at equal intervals along the axial direction of the joint 2. The transition ring 32 is located at the end of the connecting ring 31, and a limit block 33 is also provided on the outer peripheral wall of the joint 2 at the transition ring 32.
[0022] The connecting ring 31 and the transition ring 32 are both in the shape of inverted cone teeth, and the outer diameter of the transition ring 32 is greater than the outer diameter of the connecting ring 31 .
[0023] The working principle of the utility model is as follows: first, a nut 1 provided with a circle of sleeve protrusions 4 is inserted into the radial protrusion block 21 of the joint 2, then, the sleeved nut 1 and the joint 2 are put into the mold cavity of the lower mold together, and finally, the flange 41 of the sleeve protrusion 4 is stamped inwardly by the punch fixture of the upper mold and is limited against one end face of the radial protrusion block 21.
[0024] The present invention is not limited to the above-mentioned embodiments. Regardless of any changes in shape or material composition, any structural design provided by the present invention is a variation of the present invention and should be considered within the protection scope of the present invention.
Claims
1. A flexible elbow, comprising a nut (1) and a joint (2), characterized in that: The joint (2) is in the shape of a right-angle bend. A connection unit (3) for connecting a rubber tube is provided at one end of the outer peripheral wall of the joint (2). A circle of radial protrusions (21) is provided at the other end of the outer peripheral wall of the joint (2). A circle of sleeve protrusions (4) is provided at one axial end of the nut (1). The inner diameter of the sleeve protrusions (4) is larger than the outer diameter of the radial protrusions (21). The nut (1) is inserted into the radial protrusions (21) of the joint (2) through the sleeve protrusions (4). The sleeve protrusions (4) are stamped inwardly and bent by a special mold so as to abut against one end surface of the radial protrusions (21) for limiting position.
2. The flexible elbow according to claim 1, characterized in that: The sleeve-jointed protrusion (4) is integrally formed on one axial end of the nut (1) and is inclined inwardly along the axial core line of the nut (1).
3. The flexible elbow according to claim 1 or 2, characterized in that: The sleeve protrusion (4) comprises a circle of flange (41) and a connecting block (42); the flange (41) and the connecting block (42) are integrally formed; the connecting block (42) is integrally formed on one axial end of the nut (1); the flange (41) is inclined inwardly along the axial core line of the nut (1); the connecting block (42) is distributed in parallel along the axial core line of the nut (1); and the inner diameter of a circle of the flange (41) is greater than the outer diameter of the radial protrusion block (21).
4. The flexible elbow according to claim 1, characterized in that: The outer diameter of the other end of the outer peripheral wall of the joint (2) is smaller than the outer diameter of the joint (2), and the outer peripheral wall of the joint (2) at this end and the radial protrusion block (21) form a step surface (22), and a sealing ring is installed and limited through the step surface (22).
5. The flexible elbow according to claim 1, characterized in that: The inner peripheral wall of the nut (1) is provided with an internal thread (11), which is connected to a pipeline via the internal thread (11), and the inner diameter of the internal thread (11) is greater than the outer diameter of the radial protrusion (21).
6. The flexible elbow according to claim 1, characterized in that: The connection unit (3) comprises a connection ring (31) and a transition ring (32) arranged on the outer peripheral wall of the joint (2); a plurality of the connection rings (31) are arranged and are distributed in sequence at equal intervals along the axial direction of the joint (2); the transition ring (32) is located at the end of the connection ring (31); and a limit block (33) is also provided on the outer peripheral wall of the joint (2) at the transition ring (32).
7. The flexible elbow according to claim 6, characterized in that: The connecting ring (31) and the transition ring (32) are both in the shape of inverted cone teeth, and the outer diameter of the transition ring (32) is greater than the outer diameter of the connecting ring (31).