Pipeline connecting structure

Abstract

The utility model relates to the technical field of pipeline joints, in particular to a pipeline connecting structure. The pipeline connecting structure comprises a connector and a nut, a pressing connection ring is arranged at the front end of the connector, the outer wall of the pressing connection ring is a conical face with the small front end and the large rear end, an inclined pressing face is arranged on the inner wall of the nut, the connector is in threaded connection with the nut, and in the rotating and screwing process of the connector and the nut, the inclined pressing face inwards presses the outer wall of the pressing connection ring; and sealing rings are arranged in the joint and the nut. In the rotating and screwing process of the connector and the nut, the pressing connection ring is extruded by the inclined pressing face to generate tiny deformation, the outer wall of a connected pipeline is fastened, the pipeline is not prone to falling off, the structure is simple and stable, and disassembly and assembly are convenient.

Description

Technical Field

[0001] This utility model relates to the field of pipe joint technology, and in particular to a pipe connection structure. Background Technology

[0002] For example, Chinese utility model patent CN220891403U discloses a simple quick-connect pipe fitting. The quick-connect fitting includes a connecting pipe with sealing grooves on both sides of its inner wall and clearance grooves near the pipe openings at both ends. A guide plate is provided at the end of each clearance groove adjacent to the sealing groove. Two sealing rings are fitted into the two sealing grooves respectively. Two locking members are inserted into the pipe openings at both ends. Each locking member has an elastic arm at the inserted end, a locking tooth in the middle, and a guide surface at the end. Connection is achieved simply by inserting and removing the locking members for quick pipe connection.

[0003] The problem with the existing technology is that the locking parts are prone to wear during repeated insertion and removal of pipes, which leads to a decrease in the stability and sealing of the connection. In addition, the structural strength of the clamping teeth is low, resulting in insufficient clamping force for the connection of metal pipe fittings.

[0004] Therefore, existing technologies need to be improved. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a pipe connection structure that is stable and easy to install.

[0006] The technical solution adopted by this utility model to solve the problem is: a pipe connection structure, including a joint and a nut;

[0007] The connector has a crimping ring at its front end. The outer wall of the crimping ring is a conical surface with a smaller front end and a larger rear end. The inner wall of the nut has an inclined pressure surface. The connector and the nut are screwed together. During the process of rotating and tightening the connector and the nut, the inclined pressure surface presses inward against the outer wall of the crimping ring.

[0008] As a further improvement to the above technical solution, the crimping ring has a convex surface in the middle and anti-slip texture on the inner wall of the crimping ring, and the convex surface and the inclined crimping surface are interference fit.

[0009] As a further improvement to the above technical solution, the rear end of the crimping ring is provided with a threaded part, the surface of the threaded part is provided with an external thread, and the inner wall of the nut is provided with an internal thread that matches the external thread.

[0010] As a further improvement to the above technical solution, a first inclined surface is provided between the threaded part and the crimping ring, and a second inclined surface is provided between the internal thread and the inclined pressure surface, with the first inclined surface abutting against the second inclined surface.

[0011] As a further improvement to the above technical solution, a first annular groove is provided on the inner wall of the screw connection, and a first sealing ring is provided in the first annular groove.

[0012] As a further improvement to the above technical solution, a second annular groove is provided on the inner wall of the front end of the nut, and a second sealing ring is provided in the second annular groove.

[0013] As a further improvement to the above technical solution, the joint is through in the middle, and both ends of the joint are provided with insertion grooves, with a positioning retaining ring between the two insertion grooves.

[0014] The beneficial effects of this utility model are: the distance between the joint and the nut gradually tightens as they are rotated and screwed together, and the inclined pressure surface presses the crimping ring inward and downward, causing the crimping ring to produce controllable micro-deformation, tightly adhering to the pipe surface, resulting in a stable connection and convenient operation. Attached Figure Description

[0015] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of the connector and nut of this utility model;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 for Figure 2 An enlarged view of part A;

[0019] Figure 4 This is a diagram showing the usage state of this utility model when connected to a pipeline.

[0020] In the diagram: 1-Connector, 11-Crimping ring, 111-Convex surface, 112-Anti-slip texture, 12-First bevel, 13-Threaded part, 131-External thread, 132-First annular groove, 14-Plug-in groove, 15-Positioning retaining ring, 2-Nut, 21-Beveled pressure surface, 22-Second bevel, 23-Internal thread, 24-Second annular groove, 3-First sealing ring, 4-Second sealing ring. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] Reference Figures 1 to 4 A pipe connection structure, including a connector 1 and a nut 2;

[0026] Preferably, the connector 1 has a crimping ring 11 at its front end. The outer wall of the crimping ring 11 is a conical surface with a smaller front end and a larger rear end. The inner wall of the nut 2 has an inclined pressure surface 21. The connector 1 and the nut 2 are screwed together. During the screwing process of the connector 1 and the nut 2, the inclined pressure surface 21 presses inward against the outer wall of the crimping ring 11. The outer wall of the crimping ring 11 is gradually squeezed inward by the inclined pressure surface 21, causing the crimping ring 11 to undergo slight deformation, thereby fastening the connected pipe and making the pipe less likely to fall off. The structure is simple and stable, and easy to assemble and disassemble.

[0027] Preferably, the crimping ring 11 has a convex surface 111 in the middle, and the inner wall of the crimping ring 11 has anti-slip texture 112. The convex surface 111 and the inclined crimping surface 21 are interference-fitted. This further enhances the tightness and sealing of the connection between the pipe and the joint 1.

[0028] Preferably, the rear end of the crimping ring 11 is provided with a threaded part 13, the surface of the threaded part 13 is provided with an external thread 131, and the inner wall of the nut 2 is provided with an internal thread 23 that matches the external thread 131.

[0029] Preferably, a first inclined surface 12 is provided between the threaded portion 13 and the crimping ring 11, and a second inclined surface 22 is provided between the internal thread 23 and the inclined pressure surface 21, with the first inclined surface 12 and the second inclined surface 22 abutting against each other. When the connector 1 and the nut 2 are fully screwed together, the first inclined surface 12 and the second inclined surface 22 fit tightly together, enhancing the sealing performance. At the same time, the first inclined surface 12 and the second inclined surface 22 are used for positioning during the connection process of the connector 1 and the nut 2, facilitating installation by workers.

[0030] Preferably, a first annular groove 132 is provided on the inner wall of the screw connection 13, and a first sealing ring 3 is provided in the first annular groove 132.

[0031] Preferably, a second annular groove 24 is provided on the inner wall of the front end of the nut 2, and a second sealing ring 4 is provided in the second annular groove 24. This enhances the sealing performance of the pipeline connection and prevents leakage.

[0032] The connector 1 is a through-hole connector, with insertion slots 14 at both ends and a positioning retaining ring 15 between the two insertion slots 14. The positioning retaining ring 15 is used for positioning the two pipe sections during installation, making it convenient for workers to install.

[0033] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings under the inventive concept of this utility model, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A pipe connection structure, characterized in that: Includes a connector (1) and a nut (2); The connector (1) has a crimping ring (11) at the front end. The outer wall of the crimping ring (11) is a conical surface with a smaller front end and a larger rear end. The inner wall of the nut (2) has an inclined pressing surface (21). The connector (1) and the nut (2) are screwed together. During the process of rotating and tightening the connector (1) and the nut (2), the inclined pressing surface (21) presses against the outer wall of the crimping ring (11) inward.

2. The pipe connection structure as described in claim 1, characterized in that: The crimping ring (11) has a convex surface (111) in the middle and anti-slip texture (112) on the inner wall of the crimping ring (11). The convex surface (111) and the inclined pressing surface (21) are interference fit.

3. The pipe connection structure as described in claim 2, characterized in that: The rear end of the crimping ring (11) is provided with a threaded part (13), the surface of the threaded part (13) is provided with an external thread (131), and the inner wall of the nut (2) is provided with an internal thread (23) that matches the external thread (131).

4. A pipe connection structure as described in claim 3, characterized in that: A first inclined surface (12) is provided between the threaded part (13) and the crimping ring (11), and a second inclined surface (22) is provided between the internal thread (23) and the inclined pressing surface (21), and the first inclined surface (12) and the second inclined surface (22) abut against each other.

5. A pipe connection structure as described in claim 3, characterized in that: The inner wall of the screw connection (13) is provided with a first annular groove (132), and a first sealing ring (3) is provided in the first annular groove (132).

6. A pipe connection structure as described in claim 1, characterized in that: The inner wall of the front end of the nut (2) is provided with a second annular groove (24), and a second sealing ring (4) is provided in the second annular groove (24).

7. A pipe connection structure as described in claim 1, characterized in that: The connector (1) is through in the middle, and both ends of the connector (1) are provided with insertion grooves (14), and a positioning retaining ring (15) is provided between the two insertion grooves (14).

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