A convenient stainless steel quick coupling

Abstract

This utility model discloses a user-friendly stainless steel quick coupling, belonging to the field of stainless steel quick couplings. The outer end of the coupling tube has a coupling flange, and the inner end has an internal thread. The coupling tube achieves different connection methods through the coupling flange, the internal thread, and the external thread. An internal quick plug is connected to the coupling tube through the internal thread. The internal quick plug includes a insertion tube, a mating connector, and a mating thread. The mating connector is located on one side of the insertion tube, and the mating thread is located on the outer wall of the mating connector. The ingenious design of the external quick connector and internal quick plug enables rapid installation and disassembly. The external thread connects to a rotating sleeve, and the mating thread cooperates with the internal thread, facilitating operation and improving work efficiency. Its integrated design, combined with a sealing sleeve and a filler-type sealing ring, ensures a sealed connection. The insertion tube and coupling tube, as well as the mating connector and rotating sleeve, all employ a tight-sealing structure to prevent leakage. One end of the insertion tube protrudes from the coupling tube, making connection more convenient and quick.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel quick couplings, and in particular to a convenient stainless steel quick coupling. Background Technology

[0002] Stainless steel quick couplings are a highly efficient and reliable connection device in the field of pipeline valves, featuring a simple design and convenient operation. During connection, simply insert the male coupling into the female coupling and simultaneously pull down both handles for a quick connection. Disassembly is equally simple, significantly saving time and manpower. The coupling typically incorporates a flat, elastic sealing element to ensure a tight seal at the connection point. This design effectively prevents leakage, ensuring the safety and stability of fluid transmission. Stainless steel quick couplings are available in various models, such as A, B, C, D, E, F, DC, and DP, as well as F and C types with flanges. Each model is designed to meet specific needs and adapt to different application scenarios. Due to its excellent corrosion resistance and chemical stability, stainless steel allows these quick couplings to be used in various harsh chemical environments, ensuring long-term stable operation. Stainless steel quick couplings are not only easy to install but also save fluid and reduce energy consumption during use. Their long service life also creates economic value for customers.

[0003] In practical applications, stainless steel quick couplings commonly use either flange or threaded connections. However, while flange connections offer excellent sealing performance, they are more difficult to manufacture and the sealing surface is easily damaged. When connecting pipes of different diameters, the size and specifications of the flange need to be adjusted accordingly. This usually requires replacing the entire flange connection assembly, including the flange, bolts, gaskets, etc., thus increasing the complexity and cost of replacement.

[0004] While threaded connections simplify the connection process to some extent, they also have limitations. Especially when there are significant differences in pipe diameter, the specifications and dimensions of the thread must be changed, requiring the preparation of various threaded fittings to accommodate pipes of different diameters. This not only increases procurement and storage costs but may also cause additional inconvenience during on-site replacement due to size mismatches.

[0005] Whether using flanged or threaded connections, replacing the connection mechanism alone is relatively cumbersome when dealing with changes in pipe diameter. This typically requires shutting down the entire piping system, draining the medium from the pipes, and then disassembling and replacing the parts. This process is not only time-consuming and labor-intensive but may also disrupt the normal operation of the piping system. Utility Model Content

[0006] The main objective of this invention is to provide a convenient stainless steel quick connector that can effectively solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A convenient stainless steel quick coupling includes a coupling tube, an external threaded portion, and a rotating sleeve, wherein the external threaded portion is located at the outer end of the coupling tube and is connected to the rotating sleeve through the external threaded portion. The outer end of the connector tube is provided with a connector flange, and the inner end of the connector tube is provided with an internal thread. The connector tube achieves different connection methods through the connector flange, the internal thread, and the external thread. The connector tube is connected to an internal quick plug via an internal thread. The internal quick plug includes a tube, a connector, and a mating thread. The connector is located on one side of the tube, and the mating thread is located on the outer wall of the connector and is connected to the internal thread via the mating thread. One end of the tube protrudes from the connector tube to facilitate connector connection. The other side of the insertion tube has a locking interface, and a sealing sleeve is fitted at the locking interface. One end of the sealing sleeve has a locking ring that matches the locking interface. The outer wall of the sealing sleeve has a limiting ring, and a notch is formed between the limiting ring and the sealing sleeve. A filling sealing ring is fitted inside the notch.

[0008] In an optional embodiment of this application, the joint flange and the joint pipe are designed as an integral unit, with both the external thread and the internal thread located at one end of the joint pipe, and a sealing ring is provided between the joint flange and the rotating sleeve. In an optional embodiment of this application, the insertion tube, the connector, and the threaded mating part are designed as a single unit. The diameter of the connector is the same as the diameter of the connector tube. The mating head is provided with a thread that is adapted to the external threaded part for rotating the rotating sleeve onto the mating head. In an optional embodiment of this application, an annular groove is provided at the inner end of the connector, and a sealing ring is engaged in the annular groove. A retaining ring is provided inside the connector tube, and the retaining ring abuts against the sealing ring on the connector to achieve a sealed connection between the connector tube and the inner quick plug. In an optional embodiment of this application, the card interface is designed with an annular groove and the opening edge of the card interface is designed with an arc shape. The card ring is embedded in the card interface to realize the card ring and the sealing sleeve as an integrated design. The sealing sleeve and the limiting ring are integrated, and the two limiting rings are symmetrically distributed on the sealing sleeve. In an optional embodiment of this application, the filling sealing ring includes a ring body and a sealing filler. An opening is provided on the side wall of the ring body, and the sealing filler is injected into the ring body through the opening. The ring body is fixed in the notch of the sealing sleeve by an adhesive.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The ingenious design of the external quick-connect coupling and internal quick-plug allows for rapid installation and disassembly of the connector. The connection between the external thread and the rotating sleeve, as well as the tight fit between the mating thread and the internal thread, makes the operation exceptionally convenient and improves work efficiency.

[0010] The integrated design of the external quick coupling and internal quick plug, along with the application of a sealing sleeve and a filler-type sealing ring, ensures the sealing performance of the connector connection. Whether it's the connection between the tubing and the connector tube, or the mating of the connector with the rotating sleeve, a tight sealing structure is employed to effectively prevent leakage.

[0011] The applicability and flexibility of the connector have been significantly improved. Through the ingenious design of the connector flange, internal thread, and external thread, different connection methods are achieved, meeting the connection needs in various complex environments. Meanwhile, the design of the insert protruding from the connector tube makes connection more convenient and quick. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the overall structure of this utility model; Figure 3 This is a front view of the overall structure of this utility model; Figure 4 This is an exploded view of the internal quick-connect plug of this utility model.

[0013] In the diagram: 1. External quick coupling; 11. Coupling flange; 12. Coupling tube; 13. External threaded part; 14. Internal threaded part; 2. Rotary sleeve; 3. Internal quick plug; 31. Insert tube; 32. Butt joint; 33. Butt threaded part; 34. Snap-fit ​​interface; 35. Sealing sleeve; 36. Snap-fit ​​ring; 37. Limiting ring; 38. Notch; 39. Filler seal ring. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] like Figure 1 - Figure 4 As shown, a user-friendly stainless steel quick coupling consists of several parts, including a coupling tube 12, an external threaded portion 13, and a rotating sleeve 2. The external threaded portion 13 is located at the outer end of the coupling tube 12, and the rotating sleeve 2 is cleverly connected through the external threaded portion 13, making the installation and disassembly of the entire coupling exceptionally convenient.

[0016] In addition, the external quick coupling 1 also includes a coupling tube 12 and a coupling flange 11. The outer end of the coupling tube 12 is provided with the coupling flange 11, while the inner end of the coupling tube 12 is provided with an internal thread 14. Through the ingenious design of the coupling flange 11, the internal thread 14, and the external thread 13, different connection methods of the coupling are realized, improving the applicability and flexibility of the coupling.

[0017] The connector tube 12 is connected to the internal quick-connect plug 3 via the internal thread 14. The internal quick-connect plug 3 consists of a insertion tube 31, a mating connector 32, and a mating thread 33. The mating connector 32 is located on one side of the insertion tube 31, while the mating thread 33 is located on the outer wall of the mating connector 32. The tight fit between the mating thread 33 and the internal thread 14 ensures a secure connection between the insertion tube 31 and the connector tube 12. One end of the insertion tube 31 protrudes from the connector tube 12, making the connection more convenient and quick.

[0018] To further improve sealing performance, a snap-fit ​​interface 34 is provided on the other side of the insertion tube 31. A sealing sleeve 35 is fitted onto the snap-fit ​​interface 34, and a snap-fit ​​ring 36 adapted to the snap-fit ​​interface 34 is provided at one end of the sealing sleeve 35. A limiting ring 37 is provided on the outer wall of the sealing sleeve 35, and a notch 38 is formed between the limiting ring 37 and the sealing sleeve 35. A filler-type sealing ring 39 is fitted inside the notch 38 to ensure the sealing performance of the joint connection.

[0019] The connector flange 11 and connector pipe 12 are designed as a single unit, making the structure more compact. The external thread 13 and the internal thread 14 are both located at one end of the connector pipe 12. A sealing ring is provided between the connector flange 11 and the rotating sleeve 2 to ensure the sealing performance of the connection.

[0020] The insertion tube 31, the connector 32, and the mating threaded part 33 are designed as a single unit, with the diameter of the connector 32 being consistent with the diameter of the connector tube 12. The connector 32 is provided with a thread that is compatible with the external threaded part 13, allowing the rotating sleeve 2 to be easily rotated onto the connector 32, further simplifying the operation process.

[0021] The inner end of the connector 32 has an annular groove in which a sealing ring is engaged, while the connector tube 12 has a retaining ring inside. The retaining ring and the sealing ring on the connector 32 are tightly pressed together, thereby achieving a sealed connection between the connector tube 12 and the inner quick plug 3, ensuring the sealing performance of the connection.

[0022] The card interface 34 adopts an annular groove design, and the opening edge of the card interface 34 is arc-shaped. The card ring 36 is embedded in the card interface 34, realizing the integrated design of the card ring 36 and the sealing sleeve 35. The sealing sleeve 35 and the limiting ring 37 also adopt an integrated design. The two limiting rings 37 are symmetrically distributed on the sealing sleeve 35, ensuring the stability and reliability of the joint.

[0023] The filler-type sealing ring 39 includes a ring body and a sealing filler. The side wall of the ring body has an opening, through which the sealing filler is injected into the ring body, and then fixed in the notch 38 of the sealing sleeve 35 by adhesive, further improving the sealing performance of the joint.

[0024] Securely connect the connector tube 12 to the external threaded portion 13, ensuring that the external threaded portion 13 is located at the outer end of the connector tube 12. Next, connect the rotating sleeve 2 to the external threaded portion 13 via threads to complete the installation of the rotating sleeve 2. Then, install the connector flange 11 onto the outer end of the connector tube 12, ensuring that the integral design of the connector flange 11 and the connector tube 12 is secure.

[0025] Prepare the inner quick connector 3. Assemble the insert 31, connector 32, and mating threaded part 33 as a single unit, ensuring that the diameter of connector 32 matches the diameter of connector tube 12. Adapt the threads on connector 32 to the external threaded part 13 so that the rotating sleeve 2 can be easily rotated onto connector 32.

[0026] A snap-fit ​​interface 34 is opened on the other side of the insertion tube 31, and a sealing sleeve 35 is fitted onto the snap-fit ​​interface 34. Ensure that the snap-fit ​​ring 36 at one end of the sealing sleeve 35 is embedded in the snap-fit ​​interface 34, achieving an integrated design. Next, a limiting ring 37 is provided on the outer wall of the sealing sleeve 35, ensuring that a notch 38 is formed between the limiting ring 37 and the sealing sleeve 35. The ring body of the filler sealing ring 39 is fitted into the notch 38, and sealing filler is injected through the opening, then fixed to the sealing sleeve 35 using adhesive. The assembled inner quick-connect plug 3 is then tightly fitted with the internal thread 14 of the connector tube 12 via the mating thread 33, completing the assembly of the entire connector.

[0027] In use, first align the pipe or equipment to be connected with the insertion tube 31 of the connector tube 12 and the inner quick plug 3. Then, by rotating the rotating sleeve 2, the connector 32 and the external threaded portion 13 of the connector tube 12 are tightly engaged, achieving a quick connection. Simultaneously, the sealing sleeve 35 and the filler sealing ring 39 ensure a tight seal at the connection. When disassembly is required, simply rotate the rotating sleeve 2 in the opposite direction to separate the connector 32 from the external threaded portion 13, allowing for easy removal of the inner quick plug 3. The entire process is simple and convenient, improving work efficiency.

[0028] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0029] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A convenient stainless steel quick coupling, comprising a coupling tube (12), an external threaded portion (13), and a rotating sleeve (2), wherein the external threaded portion (13) is located at the outer end of the coupling tube (12), and the rotating sleeve (2) is connected through the external threaded portion (13), characterized in that: The outer end of the connector tube (12) is provided with a connector flange (11), and the inner end of the connector tube (12) is provided with an internal thread (14). The connector tube (12) achieves different connection methods of the connector through the connector flange (11), the internal thread (14) and the external thread (13). The connector tube (12) is connected to an internal quick plug (3) via an internal thread (14), and the internal quick plug (3) includes a tube (31), a connector (32), and a mating thread (33). The connector (32) is located on one side of the tube (31), and the mating thread (33) is located on the outer wall of the connector (32) and is connected to the internal thread (14) via the mating thread (33). One end of the tube (31) protrudes from the connector tube (12) to facilitate connector connection. The other side of the insertion tube (31) is provided with a locking interface (34), and a sealing sleeve (35) is provided at the locking interface (34). One end of the sealing sleeve (35) is provided with a locking ring (36) that is compatible with the locking interface (34). The outer wall of the sealing sleeve (35) is provided with a limiting ring (37), and a notch (38) is formed between the limiting ring (37) and the sealing sleeve (35). A filling sealing ring (39) is provided inside the notch (38).

2. A quick coupling of stainless steel for easy use according to claim 1, characterized in that: The joint flange (11) and the joint pipe (12) are designed as a single unit. The external thread (13) and the internal thread (14) are both located at one end of the joint pipe (12). A sealing ring is provided between the joint flange (11) and the rotating sleeve (2).

3. A quick coupling of stainless steel for easy use according to claim 2, characterized in that: The insertion tube (31), the connector (32) and the mating threaded part (33) are designed as a single unit. The diameter of the connector (32) is the same as the diameter of the connector tube (12). The connector (32) is provided with a thread, which is adapted to the external threaded part (13) for rotating the rotating sleeve (2) onto the connector (32).

4. A quick coupling of stainless steel for easy use according to claim 3, characterized in that: The inner end of the connector (32) is provided with an annular groove, in which a sealing ring is engaged. The connector tube (12) is provided with a retaining ring inside, which abuts against the sealing ring on the connector (32) to achieve a sealed connection between the connector tube (12) and the inner quick plug (3).

5. A quick coupling of stainless steel for easy use according to claim 4, characterized in that: The card interface (34) is designed with an annular groove and the opening edge of the card interface (34) is designed with an arc shape. The card ring (36) is embedded in the card interface (34) to realize the integrated design of the card ring (36) and the sealing sleeve (35). The sealing sleeve (35) and the limiting ring (37) are integrated, and the two limiting rings (37) are symmetrically distributed on the sealing sleeve (35).

6. A quick coupling of stainless steel for easy use according to claim 5, characterized in that: The filling sealing ring (39) includes a ring body and a sealing filler. The side wall of the ring body has an opening, and the sealing filler is injected into the ring body through the opening. The ring body is fixed in the notch (38) of the sealing sleeve (35) by adhesive.

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