Quick connect pneumatic line structure

Abstract

The utility model provides a kind of structure of quick connection pneumatic pipeline, including nut seat and joint body, the nut seat is the nut seat of " convex " type, nut seat is rotated and is pressed on joint body, and both are fixed together to form rigid connection;The outside of nut seat is equipped with O ring I;The taper head end of joint body has step face;Nut seat is opened with annular groove corresponding the taper head end position of joint body, the annular groove is equipped with retaining ring and snap spring, the snap spring is steel material elastic sheet, with radial elastic deformation ability;Retaining ring and snap spring are pressed into nut seat, and it is installed in external connecting block and sealed by nut seat outer thread and O ring I.The utility model provides a kind of scheme of quick connection pneumatic pipeline, without tool, just manually inserted pipeline can be connected to complete.Reduce assembly man-hour, and connection is reliable.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic pipeline connection technology, specifically to a structure for quick connection of pneumatic pipelines. Background Technology

[0002] In pneumatic systems, the reliability, sealing, and quick installation / disassembly performance of pipeline connection structures are crucial. Traditional connection methods (such as threaded connections, ferrule fittings, and quick-connect fittings) have the following problems: (1) Threaded connections are cumbersome to install: they require multiple tightening with a wrench, are inefficient, and are not suitable for frequent disassembly and assembly scenarios. Sealing relies on PTFE tape or thread sealant, which is prone to leakage after long-term use, resulting in high maintenance costs. They are prone to loosening, and the threads may come loose under vibration, requiring additional anti-loosening measures (such as locking nuts). (2) Ferrule fittings have high pre-assembly requirements, requiring precise control of the ferrule clamping force. If it is too tight, it can damage the pipeline, and if it is too loose, it will leak. They provide a single seal, and the deformation of the ferrule after disassembly is irreversible, requiring replacement with a new ferrule, resulting in poor reusability. (3) Quick-connect fittings have limited pressure-bearing capacity and are generally suitable for low-pressure pneumatic systems (<1MPa). They rely on plastic components, are prone to aging and failure under high temperature or chemical corrosion environments, have no rigid locking structure, and may accidentally come off under high pressure or vibration. To address this, we propose a structure for quickly connecting pneumatic pipelines, enabling connection without the need for tooling, simply by manually inserting the pipeline, and ensuring reliable connection. Utility Model Content

[0003] To address the problems in the existing technology, this utility model proposes a structure for quickly connecting pneumatic pipelines.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A structure for quick connection of pneumatic pipelines includes a nut seat and a connector body. The nut seat is convex in shape and is rotated and pressed onto the connector body, forming a rigid connection. An O-ring I is provided on the outside of the nut seat. The conical end of the connector body has a stepped surface. An annular groove is provided on the nut seat corresponding to the conical end of the connector body. A retaining ring and a retaining spring are provided in the annular groove. The retaining spring is a steel spring with radial elastic deformation capability. The retaining ring and retaining spring are pressed into the nut seat and installed in an external connecting block through the external thread of the nut seat and the O-ring I, and are sealed.

[0005] As a further improvement to this solution, the nut seat and the connector body are provided with an O-ring II for sealing in the middle section of the connection, and an O-ring III for sealing in the bottom section of the connection.

[0006] As a further improvement to this solution, the conical end of the connector body passes through due to its radial deformation when it is pressed against the retaining ring.

[0007] As a further improvement to this solution, the connector body is provided with multiple corresponding O-ring grooves.

[0008] As a further improvement to this solution, the connector body and nut seat are made of steel.

[0009] Compared with existing technologies, the advantages of this invention are: when the conical end of the connector is inserted, the retaining spring is radially deformed, achieving one-click insertion. After the retaining spring rebounds, it locks into the stepped surface, forming a rigid connection resistant to pull-out, avoiding the problem of accidental disengagement of the quick-connect fitting. Connection can be completed manually by inserting the pipe without the need for tooling. This reduces assembly time and ensures reliable connection. The retaining ring and retaining spring, which ensure the connection does not fall off, have a simple and effective structure, reducing not only the material usage of the connector itself but also the material usage of the connector body. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings.

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall side view structure of this utility model; Figure 3 This is a three-dimensional cross-sectional structural diagram of the present invention; Figure 4 This is a frontal cross-sectional view of the present invention.

[0012] The diagram shows: 1-nut seat; 2-connector body; 3-O-ring III; 4-O-ring II; 5-O-ring I; 6-retaining ring; 7-circlip. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Example 1 like Figure 1-4As shown, this embodiment provides a structure for quickly connecting pneumatic pipelines, including a nut seat 1 and a connector body 2. The nut seat 1 is a convex-shaped nut seat, which is rotated and pressed onto the connector body 2, and the two are fixed together to form a rigid connection; an O-ring I5 is provided on the outside of the nut seat 1; the conical end of the connector body 2 has a stepped surface; an annular groove is opened on the nut seat 1 corresponding to the conical end of the connector body 2, and a fixing ring 6 and a retaining spring 7 are provided in the annular groove. The retaining spring 7 is a steel spring sheet with radial elastic deformation capability; the fixing ring 6 and the retaining spring 7 are pressed into the nut seat 1 and installed in the external connecting block through the external thread of the nut seat 1 and the O-ring I5 and are sealed.

[0015] The nut seat 1 and the connector body 2 are equipped with O-rings II 4 for sealing in the middle section of the connection, and O-rings III 3 for sealing in the bottom section of the connection. The connector body 2 has multiple corresponding O-ring grooves. O-ring installation: O-ring I 5 is installed on the outside of the nut seat 1 for static sealing with the external connecting block. O-rings II 4 and O-rings III 3 are installed in the middle and bottom sections of the connector body 2 respectively, forming a multi-stage dynamic seal.

[0016] When the conical end of the connector body 1 is pressed against the retaining ring 7, it passes through due to its radial deformation.

[0017] The connector body 1 and the nut seat 2 are made of steel. The conical end of the connector body 2 is aligned with the retaining spring 7 of the nut seat 1, and axial force is applied for insertion. The beveled surface of the conical end compresses the retaining spring 7, causing it to expand radially and deform, allowing the connector body 2 to pass through. After the stepped surface of the connector body 2 passes the retaining spring 7, the retaining spring 7 springs back and locks behind the stepped surface, forming an anti-pull-out locking mechanism.

[0018] Nut seat 1 is rotated for fastening: By rotating nut seat 1, its external thread engages with the external connecting block, while simultaneously pressing O-ring I5 to achieve an end face seal. The "convex" shaped structure of nut seat 1 provides a larger contact surface, enhancing connection rigidity.

[0019] Specifically, when connecting connector 2, it is directly inserted into the inner hole of nut seat 1. The conical end of connector 2 is pressed against the retaining ring 7, causing radial deformation and allowing it to pass through. The connection is complete when the first step end face passes the retaining ring and is axially limited, preventing further insertion. After installation, because the stepped surface of connector 2 contacts the end face of retaining ring 7, the lack of a gradually expanding cone angle allows the connector to be gripped by the retaining ring and cannot be pulled out in the opposite direction. For disassembly, a wrench is used to remove nut seat 1 along with the connector as a whole. Then, a tool is used to pry open retaining ring 7 and remove the connector. When the conical end of the connector is inserted, it compresses the retaining ring, causing radial deformation and enabling one-click insertion. After the retaining ring rebounds, it locks onto the stepped surface, forming a rigid, pull-out-resistant connection, preventing accidental disengagement of the quick-connect connector. Connection can be completed manually by inserting the pipe without the need for tooling. This reduces assembly time and ensures reliable connection. The retaining ring and retaining ring, which ensure the connection does not fall off, have a simple and effective structure, reducing both the material usage of the connector and the material usage of the connector itself.

[0020] The above description is merely an illustrative example of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in the claims, all of which should fall within the protection scope of this utility model.

Claims

1. A structure of a quick connection pneumatic line comprising a nut seat (1) and a joint body (2), characterized in that, The nut seat (1) is a convex nut seat. The nut seat (1) is rotated and pressed onto the connector body (2), and the two are fixed together to form a rigid connection. The nut seat (1) is provided with an O-ring I (5) on the outside. The conical end of the connector body (2) has a stepped surface. The nut seat (1) is provided with an annular groove corresponding to the conical end of the connector body (2). The annular groove is provided with a fixing ring (6) and a retaining ring (7). The retaining ring (7) is a steel spring sheet with radial elastic deformation capability. The fixing ring (6) and the retaining ring (7) are pressed into the nut seat (1) and installed in the external connecting block through the external thread of the nut seat (1) and the O-ring I (5) and sealed.

2. A quick connect pneumatic line structure according to claim 1, wherein, The nut seat (1) and the connector body (2) are provided with an O-ring II (4) for sealing in the middle section of the connection, and an O-ring III (3) for sealing in the bottom section of the connection.

3. A quick connect pneumatic line structure according to claim 1, wherein, When the conical end of the connector body (2) is pressed against the retaining ring (7), it passes through due to its radial deformation.

4. The quick connect pneumatic line structure of claim 1, wherein, The connector body (2) is provided with multiple corresponding O-ring grooves.

5. The quick connect pneumatic line structure of claim 1, wherein, The connector body (2) and the nut seat (1) are made of steel.

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