Clamping and pressing type loose joint

Abstract

The utility model relates to the technical field of loose joints, and discloses a clamping and pressing type loose joint which comprises a clamping and pressing external thread straight joint, a clamping and pressing internal thread loose joint, a sealing ring and a loose joint nut. A flat gasket groove used for containing a sealing ring is formed in the outer side of the end, close to the loose joint nut, of the clamping and pressing internal thread loose joint, the radial length of the flat gasket groove is smaller than that of the sealing ring, and the loose joint nut is in threaded connection with the end, provided with external threads, of the clamping and pressing external thread straight joint. The stepped flat gasket groove used for containing the sealing ring is arranged, the thickness of the sealing ring is increased, the position of the sealing ring is limited, the movable welding risk is reduced through the clamping and pressing structure, and the installation efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of union technology and relates to a press-fit union. Background Technology

[0002] In the process of realizing this invention, the inventors discovered that the prior art has at least the following problems: Although there are pipe fitting union products on the market, these products have some defects in structural design, which leads to many problems in their practical applications. Specifically, these problems are mainly reflected in the following aspects:

[0003] 1. O-rings are prone to displacement, resulting in poor sealing performance: In existing union products, the design and installation of the sealing rings are not robust enough. When subjected to external forces or temperature changes, the rings are prone to displacement, leading to a decrease in sealing effectiveness. O-ring displacement not only affects the sealing performance of the pipeline but may also cause leaks, especially in environments with extremely high sealing requirements, such as those involving gas, where this risk is particularly serious.

[0004] 2. Installation difficulties: Traditional union products often fail to position the rubber ring during installation, requiring two people and resulting in low installation efficiency. These difficulties not only increase construction costs but can also lead to insufficient sealing and strength at the connection point due to improper installation, affecting the safety and reliability of the entire piping system.

[0005] 3. Insufficient strength: Some union products are designed with insufficient strength and cannot withstand high pressure and vibration. They are prone to deformation or damage during use, increasing the risk of leakage. This problem is more prominent in high-pressure, high-temperature or high-vibration environments.

[0006] Therefore, how to provide a press-fit union to improve installation efficiency and sealing performance has become an urgent technical problem to be solved. Utility Model Content

[0007] To overcome the problems existing in related technologies, this application aims to provide a press-fit union that can improve installation efficiency and sealing performance.

[0008] This application is achieved through the following technical solution.

[0009] This technical solution provides a press-fit union, including: a press-fit external thread straight connector, a press-fit internal thread union, a sealing ring, and a union nut. The union nut is rotatably connected to the outside of the press-fit internal thread union. The outer side of the end of the press-fit internal thread union near the union nut has a flat washer groove for placing the sealing ring. The radial length of the flat washer groove is less than the radial length of the sealing ring. The union nut is threadedly connected to the end of the press-fit external thread straight connector with external threads.

[0010] The present invention is further configured such that the cross-section of the sealing ring is rectangular, and the width of the sealing ring is smaller than the width of the flat gasket groove.

[0011] The present invention is further configured such that the cross-section of the sealing ring is a rectangle with curved concave sides, and a sealing ring with a cross-sectional area smaller than that of the sealing ring is provided inside the groove. The height of the sealing ring is greater than the height of the groove, and the height of the groove is less than three-eighths of the height of the sealing ring.

[0012] The present invention is further configured such that the flat gasket groove is a stepped groove with staggered heights, and a sealing ring A and a sealing ring B are arranged sequentially inside the stepped groove. The sealing ring B has a rectangular cross-section, and the sealing ring A has an "L" shaped cross-section. A curved protrusion is provided on the side of the sealing ring A that is close to the swivel nut and abuts against the sealing ring B.

[0013] The present invention is further configured such that the sealing ring, sealing ring A and sealing ring B are all made of corrosion-resistant materials.

[0014] The present invention is further provided that the socket end of the press-fit external thread straight head and the press-fit internal thread union, which is away from the sealing ring, is provided with a press-fit structure.

[0015] The present invention is further configured such that both the external threaded connector and the internal threaded connector are made of stainless steel.

[0016] The above technical solution has the following technical effects: By setting one end of the press-fit external threaded connector and the press-fit internal threaded connector with a thread and the other end with a press-fit socket, and by adjusting the structure of the threaded end of the press-fit internal threaded connector, a special limiting structure is added to prevent the sealing ring from shifting. That is, a stepped flat washer groove is set for placing the sealing ring. The stepped design can increase the thickness of the flat washer of the connector and increase the contact area between the connector nut and the flat washer. The press-fit socket design can reduce the risk of dynamic welding and improve installation efficiency.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0019] Figure 1 This is a schematic diagram of the structure shown in one embodiment of this application;

[0020] Figure 2 This is a cross-sectional view shown in one embodiment of this application;

[0021] Figure 3 This is a schematic diagram of a concave sealing ring structure shown in one embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the sealing ring A structure shown in one embodiment of this application.

[0023] Reference numerals: 1. Press-fit male threaded straight connector; 2. Press-fit female threaded union connector; 3. Sealing ring; 4. Union nut; 5. Sealing ring A; 6. Sealing ring B. Detailed Implementation

[0024] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0026] This utility model discloses a press-fit union, such as... Figures 1-4 As shown, it includes: a press-fit external thread straight connector 1, a press-fit internal thread union 2, a sealing ring 3, and a union nut 4. The union nut 4 is rotatably connected to the outside of the press-fit internal thread union 2. The press-fit internal thread union 2 has a flat washer groove for placing the sealing ring 3 on the outer side of the end near the union nut 4. The radial length of the flat washer groove is less than the radial length of the sealing ring 3. The union nut 4 is threadedly connected to the end of the press-fit external thread straight connector 1 that has an external thread.

[0027] It should be noted that the first end of the press-fit external threaded connector 1 and the press-fit internal threaded connector 2 is provided with a threaded structure, and the second end is provided with a press-fit socket. The structure of the first end of the press-fit internal threaded connector 2 has been adjusted to provide a stepped flat gasket groove, thereby limiting the sealing ring 3.

[0028] like Figure 2 As shown, the cross-section of the sealing ring 3 is rectangular, and the width of the sealing ring 3 is smaller than the width of the flat gasket groove.

[0029] like Figure 3 As shown, the cross-section of the sealing ring 3 is a rectangle with curved inwards on both sides. Inside the groove, there is a sealing ring with a cross-sectional area smaller than that of the sealing ring 3. The height of the sealing ring is greater than the height of the groove, and the height of the groove is less than three-eighths of the height of the sealing ring 3.

[0030] It should be noted that when the union nut 4 is tightened to the first end of the press-fit external threaded connector 1, as the union nut 4 is tightened, the sealing ring 3 and the sealing ring are gradually compressed, causing the sealing ring 3 and the sealing ring to deform and fit tightly together. In addition, they abut against the connection between the press-fit external threaded connector 1 and the press-fit internal threaded connector 2 to achieve a sealing effect.

[0031] like Figure 4 As shown, the flat gasket groove is a stepped groove with staggered heights. Inside the stepped groove, sealing rings A5 and B6 are arranged in sequence. The cross-section of sealing ring B6 is rectangular, and the cross-section of sealing ring A5 is "L" shaped. The side of sealing ring A5 that is close to the union nut 4 and abuts against sealing ring B6 is provided with a curved protrusion.

[0032] It should be noted that the curved protrusion can be used to support the sealing ring B6 to achieve a limiting effect. During the process of gradually compressing to achieve sealing, the sealing rings A5 and B6 can squeeze each other to improve the tightness of the connection between the sealing rings A5 and B6 and the press-fit external threaded connector 1 and the press-fit internal threaded connector 2.

[0033] like Figures 1-4 As shown, sealing rings 3, A5, and B6 are all made of corrosion-resistant materials.

[0034] like Figures 1-4 As shown, both the crimping external thread straight connector 1 and the crimping internal thread union 2 have crimping structures at the socket ends away from the sealing ring 3.

[0035] like Figures 1-4 As shown, both the external threaded connector 1 and the internal threaded connector 2 are made of stainless steel.

[0036] Working principle: By setting one end of the press-fit external threaded connector 1 and the press-fit internal threaded connector 2 with a thread and the other end with a press-fit socket, and adjusting the structure of the threaded end of the press-fit internal threaded connector 2, a special limiting structure is added to prevent the sealing ring 3 from shifting. That is, a stepped flat washer groove is set for placing the sealing ring 3. The stepped design can increase the thickness of the flat washer of the connector, improve the strength and stability of the connection, increase the contact area between the connector nut 4 and the flat washer, and improve the sealing effect. The press-fit socket design reduces the risk of dynamic welding and improves installation efficiency.

[0037] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A press-fit union, characterized in that, include: The device comprises a press-fit external thread straight connector (1), a press-fit internal thread union connector (2), a sealing ring (3), and a union nut (4). The union nut (4) is rotatably connected to the outside of the press-fit internal thread union connector (2). The press-fit internal thread union connector (2) has a flat washer groove for placing the sealing ring (3) on the outer side of one end near the union nut (4). The radial length of the flat washer groove is less than the radial length of the sealing ring (3). The union nut (4) is threadedly connected to the end of the press-fit external thread straight connector (1) that has an external thread.

2. The press-fit union according to claim 1, characterized in that, The sealing ring (3) has a rectangular cross-section, and the width of the sealing ring (3) is smaller than the width of the flat groove.

3. The press-fit union according to claim 1, characterized in that, The cross-section of the sealing ring (3) is a rectangle with curved inwards on both sides. A sealing ring with a cross-sectional area smaller than that of the sealing ring (3) is provided inside the groove. The height of the sealing ring is greater than the height of the groove, and the height of the groove is less than three-eighths of the height of the sealing ring (3).

4. The press-fit union according to claim 1, characterized in that, The flat groove is a stepped groove with staggered heights. A sealing ring A (5) and a sealing ring B (6) are arranged sequentially inside the stepped groove. The cross-section of the sealing ring B (6) is rectangular, and the cross-section of the sealing ring A (5) is "L" shaped. A curved protrusion is provided on the side of the sealing ring A (5) that is close to the swivel nut (4) and abuts against the sealing ring B (6).

5. The press-fit union according to any one of claims 1-4, characterized in that, The sealing rings (3), A (5) and B (6) are all made of corrosion-resistant materials.

6. The press-fit union according to any one of claims 1-4, characterized in that, Both the external threaded connector (1) and the internal threaded connector (2) have a clamping structure at the socket end away from the sealing ring (3).

7. The press-fit union according to claim 1, characterized in that, Both the external threaded connector (1) and the internal threaded connector (2) are made of stainless steel.

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