A high sealing performance threaded joint

Abstract

The utility model relates to the technical field of threaded joint, especially to a threaded joint with high sealing performance. The threaded joint comprises a first pipe joint and a second pipe joint, a first connecting sleeve is fixedly arranged on the outside of the first pipe joint, a second connecting sleeve is fixedly arranged on the outside of the second pipe joint, the second connecting sleeve is threadedly connected with the first connecting sleeve, and the inside of one end of the first pipe joint extends outward to form a plug-in joint matched with the inside of the second pipe joint. The threaded joint has more advantages in structure, can provide multiple sealing protection, and is more stable and reliable in connection.

Description

Technical Field

[0001] This utility model relates to the field of threaded joint technology, and in particular to a threaded joint with high sealing performance. Background Technology

[0002] Threaded pipe fittings are key components widely used in the industrial field. They enable quick connection and disconnection between pipes by machining or installing threads at the pipe ends. These fittings are commonly used in pipeline systems that transport fluids such as water, oil, and gas. One of their core performance requirements is excellent sealing performance to prevent media leakage and ensure the safe and stable operation of the system. This is especially true in conditions involving high pressure, corrosive or expensive media, where the requirements for sealing performance are even more stringent.

[0003] However, existing conventional threaded joint structures still face several challenges in long-term use. Common structures often rely on the tightness of the threaded fit or a single-location seal to achieve a seal. This single-seal method may be unreliable when dealing with system pressure fluctuations, temperature changes, or mechanical vibrations. Microscopic gaps may exist at the threaded connection itself, becoming potential leakage points. Furthermore, the structural design of some joints may make it difficult to ensure uniform pressure on the sealing element during installation, or repeated disassembly and reassembly may cause a decrease in sealing effectiveness, affecting the long-term sealing stability and service life of the joint. Utility Model Content

[0004] This invention provides a threaded connector that is structurally superior, offers multiple sealing guarantees, and provides a more robust and reliable connection.

[0005] The technical solution adopted by this utility model is as follows: a high-sealing threaded joint, including a first pipe joint and a second pipe joint, wherein a first connecting sleeve is fixedly sleeved on the outside of the first pipe joint, and a second connecting sleeve is fixedly sleeved on the outside of the second pipe joint and the second connecting sleeve is threadedly connected to the first connecting sleeve, and one end of the first pipe joint extends outward to form a plug joint that mates with the inside of the second pipe joint.

[0006] As a further improvement of this utility model, the first connecting sleeve is integrally connected to the first pipe joint, and the second connecting sleeve is integrally connected to the second pipe joint.

[0007] As a further improvement of this utility model, one end of the second pipe joint extends outward with a sleeve, and one end of the first pipe joint is provided with a slot that mates with the sleeve.

[0008] As a further improvement of this utility model, a sealing ring is fitted inside the slot of the first pipe joint.

[0009] As a further improvement of this utility model, the outer surface of the second connecting sleeve near the first connecting sleeve is provided with an external thread, and the inner surface of the first connecting sleeve near the second connecting sleeve is provided with an internal thread that matches the external thread.

[0010] As a further improvement of this utility model, a sealing ring is provided on the outer side of the connection between the second connecting sleeve and the first connecting sleeve.

[0011] As a further improvement of this utility model, both the sealing ring one and the sealing ring two are made of rubber.

[0012] The beneficial effects of this utility model are as follows: This utility model forms a first seal by mating the inner side of the plug and the second pipe joint, and forms a second seal by combining the plug-in mating of the sleeve and the slot with the built-in sealing ring. At the same time, a second sealing ring is set on the outer side of the threaded connection of the connecting sleeve to form a third seal. This multi-seal structure effectively improves the overall sealing performance of the joint. In addition, the one-piece molded connecting sleeve and pipe joint structure enhances the connection rigidity and stability, enabling the joint to better adapt to pressure fluctuations and mechanical vibrations. It has the outstanding advantages of reliable connection, excellent sealing performance and long service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a high-sealing threaded joint according to this utility model;

[0014] Figure 2 This is a structural breakdown of a high-sealing threaded joint according to this utility model. Figure 1 ;

[0015] Figure 3 This is a structural breakdown of a high-sealing threaded joint according to this utility model. Figure 2 ;

[0016] Figure 4 This is a partial sectional view of a high-sealing threaded joint according to this utility model.

[0017] As shown in the figure: 1. First pipe joint; 101. Insert joint; 102. Slot; 2. Second pipe joint; 201. Insert sleeve; 3. First connecting sleeve; 4. Second connecting sleeve; 5. Sealing ring one; 6. Sealing ring two. Detailed Implementation

[0018] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.

[0019] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] This utility model provides the following: Figure 1-4 The high-sealing-performance threaded joint shown includes a first pipe joint 1 and a second pipe joint 2. The first pipe joint 1 is fixedly sleeved with a first connecting sleeve 3 on its outer side, and the second pipe joint 2 is fixedly sleeved with a second connecting sleeve 4 on its outer side and the second connecting sleeve 4 is threadedly connected to the first connecting sleeve 3. One end of the first pipe joint 1 extends outward from its inner side to form a plug 101 that mates with the inner side of the second pipe joint 2.

[0022] In this utility model, the first connecting sleeve 3 is integrally connected to the first pipe joint 1, and the second connecting sleeve 4 is integrally connected to the second pipe joint 2. This can significantly enhance the structural strength and integrity between the connecting sleeve and the pipe joint, effectively avoid stress concentration and leakage risks that may occur due to welding or assembly connections, and ensure the stability of the connection under long-term high pressure or vibration conditions.

[0023] like Figure 2 and Figure 3 As shown, in this utility model, the second pipe connector 2 has a sleeve 201 extending outward at one end, and the first pipe connector 1 has a slot 102 that mates with the sleeve 201 at one end. A sealing ring 5, made of rubber, is fitted inside the slot 102 of the first pipe connector 1. When the first pipe connector 1 and the second pipe connector 2 are connected, the sleeve 201 can be precisely embedded in the slot 102, forming a uniform compression on the sealing ring 5. After being subjected to bidirectional pressure from the outer wall of the sleeve 201 and the inner wall of the slot 102, the rubber sealing ring 5 will undergo elastic deformation, thereby tightly filling the mating gap between the sleeve 201 and the slot 102, effectively preventing fluid medium from leaking from this part, and achieving a reliable sealing effect of the second seal.

[0024] like Figure 2 and Figure 3As shown, in this utility model, the outer surface of the second connecting sleeve 4 near the first connecting sleeve 3 is provided with an external thread, and the inner surface of the first connecting sleeve 3 near the second connecting sleeve 4 is provided with an internal thread that matches the external thread. A sealing ring 6 is fitted on the outer side of the connection between the second connecting sleeve 4 and the first connecting sleeve 3. The sealing ring 6 is made of rubber. Through the helical engagement of the external thread on the outer surface of the second connecting sleeve 4 and the internal thread on the inner surface of the first connecting sleeve 3, the first connecting sleeve 3 and the second connecting sleeve 4 can be conveniently connected and fastened. During the thread tightening process, the second connecting sleeve 4 will drive the second pipe connector 2 to move towards the first pipe connector 1, causing the plug 101 to fit tightly with the inner side of the second pipe connector 2. At the same time, the plug 201 also gradually penetrates into the slot 102 and squeezes the sealing ring 5. When the threaded connection reaches the preset tightness, the end faces of the second connecting sleeve 4 and the first connecting sleeve 3 are in contact or form a small gap. At this time, the sealing ring 6 is fitted on the outer side of the connection between the two. The inner side of the sealing ring 6 is in close contact with the outer surface of the first connecting sleeve 3 and the second connecting sleeve 4. Its own elastic deformation can fill the thread gap that may exist at the connection of the connecting sleeve and the fitting gap caused by the machining error, thereby forming a third effective sealing barrier on the outside of the connecting sleeve, further preventing moisture, dust and other impurities in the external environment from entering the threaded connection part, and at the same time, it can also play a secondary blocking role against possible minor leakage inside.

[0025] Working Principle: In practical implementation, the first and second pipe connectors are first aligned, ensuring the plug of the first pipe connector aligns with the inner side of the second pipe connector, while simultaneously ensuring the sleeve of the second pipe connector corresponds to the slot of the first pipe connector. Next, the external thread of the second connecting sleeve is aligned with the internal thread of the first connecting sleeve, and the second connecting sleeve is manually rotated to gradually engage the threads. As the threads are screwed in, the second connecting sleeve slowly moves the second pipe connector closer to the first pipe connector. At this time, the plug gradually inserts into the inner side of the second pipe connector, forming a preliminary radial fit, constituting the first seal. Simultaneously, the sleeve also gradually enters the slot, compressing the sealing ring 1 within the slot. The sealing ring 1, after being compressed, undergoes elastic deformation, tightly filling the space between the sleeve and the inner wall of the slot, forming the second seal. The second connecting sleeve is continuously tightened until the threaded connection reaches the designed tightening torque. At this point, the connecting end faces of the first and second connecting sleeves are tightly fitted, and the plug and the inner side of the second pipe connector, as well as the sleeve and the slot, achieve optimal fit. Finally, take a matching sealing ring two and place it on the outside of the connection between the first and second connecting sleeves, ensuring that the sealing ring two completely covers the joint between the two connecting sleeves. Under its own elasticity, the sealing ring two fits tightly against the outer surface of the connecting sleeve, filling any possible tiny gaps and forming a third seal. When fluid passes through this threaded joint, it is first blocked by the first seal formed by the mating of the plug and the inner side of the second pipe joint. If a small amount of fluid breaks through the first seal, it will be immediately intercepted by the second seal where the sealing ring one is located. The sealing ring two effectively prevents external environmental factors from corroding the threaded connection and prevents possible minor internal leaks, thus achieving triple sealing protection and ensuring high sealing performance and connection stability during fluid transportation.

[0026] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-sealing-performance threaded joint, comprising a first pipe joint (1) and a second pipe joint (2), characterized in that: The first pipe joint (1) is fixedly fitted with a first connecting sleeve (3) on the outside, and the second pipe joint (2) is fixedly fitted with a second connecting sleeve (4) on the outside, and the second connecting sleeve (4) is threadedly connected to the first connecting sleeve (3). The inner side of one end of the first pipe joint (1) extends outward to form a plug (101) that mates with the inner side of the second pipe joint (2).

2. The high-sealing-performance threaded joint according to claim 1, characterized in that: The first connecting sleeve (3) is integrally connected to the first pipe joint (1), and the second connecting sleeve (4) is integrally connected to the second pipe joint (2).

3. A high-sealing-performance threaded joint according to claim 1, characterized in that: The second pipe connector (2) has a sleeve (201) extending outward at one end, and the first pipe connector (1) has a slot (102) that mates with the sleeve (201) at one end.

4. A high-sealing-performance threaded joint according to claim 1, characterized in that: The first pipe joint (1) is fitted with a sealing ring (5) inside the slot (102).

5. A high-sealing-performance threaded joint according to claim 1, characterized in that: The second connecting sleeve (4) has an external thread on its outer surface near the first connecting sleeve (3), and the first connecting sleeve (3) has an internal thread on its inner surface near the second connecting sleeve (4) that matches the external thread.

6. A high-sealing-performance threaded joint according to claim 1, characterized in that: A sealing ring 2 (6) is provided on the outer side of the connection between the second connecting sleeve (4) and the first connecting sleeve (3).

7. A high-sealing-performance threaded joint according to claim 4, characterized in that: Both the sealing ring one (5) and the sealing ring two (6) are made of rubber.

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