Flange joint with high sealing performance

Abstract

The utility model relates to the technical field of flange joints, and discloses a high-sealing-performance flange joint which comprises a flange joint body, a sealing ring groove is formed in one end of the flange joint body, and an elastic pressure adjusting component, a sealing washer and an adjusting rod piece are arranged in the sealing ring groove in a sleeved mode. An elastic structure in the elastic pressure adjusting part extends to the inner wall of one side of the sealing ring groove to be installed, one end of the adjusting rod piece is movably connected with a pressed ball, and the pressed ball is installed on the surface of the other side of the elastic pressure adjusting part. The other end of the adjusting rod piece is in threaded connection with the interior of one end of the flange connector and extends to the outer side of one end of the flange connector. According to the utility model, a self-pressure sealing structure is formed by the elastic pressure regulating component and the sealing washer, so that in the use process of the linkage flange joint and the sealing ring groove, the assembly pressure and the reset pressure of a reset spring in the elastic pressure regulating component can be utilized; and the sealing strength of the sealing washer on a connecting gap between the flange joint and a corresponding connecting structure is fully improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flange joints, in particular to a flange joint with high sealing performance. Background Technique

[0002] As a common mechanical fitting, the flange joint is small in size, light in weight and good in elasticity, and is often used in the assembly and production of power equipment such as steam turbines, gas turbines, compressors, pumps and other industrial and agricultural equipment. However, for a flange joint working for a long time, due to the creep relaxation of the sealing gasket and bolts, the residual stress on the gasket gradually decreases, and the sealing reliability of the flange joint gradually decreases, and finally leads to leakage failure. Therefore, how to ensure the continuous and high sealing performance of the flange joint is an urgent problem to be solved in the industry.

[0003] In recent years, with the further development of subsequent technologies, there has emerged an authorized patent with the application number CN202123229814.7 in the prior art, which proposes "a high-sealing flange joint that fastens two flange plates through bolts and elastic fasteners to prevent leakage of the flange joint, and the setting of the sealing gasket and the sealing washer improves the sealing performance of the flange joint". From the theoretical effect, it is feasible to improve the sealing performance by increasing the connection pressure of the two assembled flange joints in the above prior art. However, this still ignores the problem that due to the creep relaxation of the sealing gasket and bolts, the residual stress on the sealing gasket gradually decreases, and the sealing reliability of the flange joint gradually decreases, and does not optimize the structural sealing performance during the use of the existing flange joint from the source. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a flange joint with high sealing performance, and solves the problems put forward in the above background technique.

[0005] The utility model provides the following technical solutions: a flange joint with high sealing performance, including a flange joint, a sealing ring groove is opened inside one end of the flange joint, an elastic pressure regulating component, a sealing washer and an adjusting rod are sleeved in the sealing ring groove, and the elastic structure inside the elastic pressure regulating component extends to be installed on the inner wall on one side of the sealing ring groove;

[0006] One end of the adjusting rod is movably connected with a pressure-receiving sphere, the pressure-receiving sphere is installed on the other side surface of the elastic pressure regulating component, and the other end of the adjusting rod is threadedly connected inside one end of the flange joint and extends to the outside of one end of the flange joint.

[0007] Preferably, the elastic pressure regulating component includes an annular pressing plate and a return spring. The return spring is used as the elastic structure inside the elastic pressure regulating component, and its two ends are respectively connected to the side surface on one side of the annular pressing plate and the inner wall on one side of the sealing ring groove.

[0008] Preferably, the side surface of the other side of the annular pressing plate is adhesively connected to one side surface of the sealing gasket, and the annular pressing plate and the sealing gasket are both clamped inside the sealing ring groove.

[0009] Preferably, the number of the reset springs is not less than two and they are evenly distributed on the surface of one side of the annular pressing plate. After the reset springs are compressed to the minimum deformation value, the sealing gasket is completely sleeved inside the sealing ring groove.

[0010] Preferably, the adjusting rod member includes a T-shaped threaded rod, a limiting sleeve, an inclined surface adjusting block, and a hexagonal rod. One end of the limiting sleeve is fixedly connected to one end of the inclined surface adjusting block. The other end of the inclined surface adjusting block is provided with an inclined surface structure, and the inclined surface structure is in fit connection with the surface of the pressure-bearing sphere. The pressure-bearing sphere is installed on the surface of one side of the annular pressing plate. One end of the T-shaped threaded rod is clamped inside the limiting sleeve, and the other end of the T-shaped threaded rod is threadedly connected to the inside of one end of the flange joint and extends to the outside of one end of the flange joint.

[0011] Preferably, one end of the hexagonal rod is installed on the end head of the other end of the T-shaped threaded rod, and a limiting sleeve plate is sleeved on the surface of the end head of the other end of the T-shaped threaded rod.

[0012] Preferably, the surface of the inclined surface adjusting block is in fit connection with the inner wall of one side of the sealing ring groove, and the corners of the inclined surface adjusting block are all provided with rounded corner structures.

[0013] Preferably, the number of the adjusting rod members is the same as the number of the pressure-bearing spheres and is not less than two.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model forms a self-pressure sealing structure through the arranged elastic pressure regulating component and the sealing gasket. Then, during the use of the coupling flange joint and the sealing ring groove, the assembly pressure and the reset pressure of the reset spring inside the elastic pressure regulating component can be utilized to fully improve the sealing strength of the sealing gasket for the connection gap between the flange joint and the corresponding connection structure.

[0016] 2. The utility model can perform secondary pressure adjustment on the self-pressure sealing structure through the arranged adjusting rod member without interfering with the actual use of the flange joint and relying on the support of the flange joint. Then, when the problem that the residual stress on the sealing gasket gradually decreases occurs during long-term use, there is no need to disassemble the whole device for maintenance. The sealing strength of the sealing gasket can be directly increased through the adjusting rod member, which is flexible and practical in use, and fundamentally solves the problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial cross-sectional schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the structural sealing ring groove of the present utility model;

[0019] Figure 3 This is a schematic front view of the structure of the present utility model;

[0020] Figure 4 This is a schematic left view of the structure of the present utility model;

[0021] Figure 5 This is an enlarged schematic view of the elastic pressure regulating component of the structure of the present utility model;

[0022] Figure 6 This is an enlarged schematic view of the adjusting rod member of the structure of the present utility model;

[0023] Figure 7 This is the structure of the present utility model Figure 1 An enlarged schematic view of part A in.

[0024] In the figure: 1. Flange joint; 2. Sealing ring groove; 3. Elastic pressure regulating component; 31. Annular pressing plate; 32. Return spring; 4. Sealing gasket; 5. Adjusting rod member; 51. T-shaped threaded rod; 52. Limit sleeve; 53. Inclined plane adjusting block; 54. Hexagonal rod; 6. Compressed sphere. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1-7 , A flange joint with high sealing performance, including a flange joint 1. A sealing ring groove 2 is opened inside one end of the flange joint 1. An elastic pressure regulating component 3, a sealing gasket 4, and an adjusting rod member 5 are sleeved inside the sealing ring groove 2. The elastic structure inside the elastic pressure regulating component 3 extends to be installed on the inner wall on one side of the sealing ring groove 2;

[0027] The elastic pressure regulating component 3 includes an annular pressing plate 31 and a return spring 32. The return spring 32 serves as the elastic structure inside the elastic pressure regulating component 3, and its two ends are respectively connected to the side surface on one side of the annular pressing plate 31 and the inner wall on one side of the sealing ring groove 2. The elastic pressure regulating component 3, as an elastic pressure applying structure, will perform a linkage operation with the sealing gasket 4 and the adjusting rod member 5, and then realize further pressure sealing of the sealing gasket 4 and the pressure conversion output of the adjusting rod member 5;

[0028] The side surface of the other side of the annular pressing plate 31 is adhesively connected to one side surface of the sealing gasket 4, which provides favorable adjustment for the replacement of the new sealing gasket 4 in the future and also creates favorable conditions for the sustainable and highly sealed use of the overall device. The annular pressing plate 31 and the sealing gasket 4 are both clamped inside the sealing ring groove 2;

[0029] The number of the reset springs 32 is not less than two and they are evenly distributed on the surface of one side of the annular pressing plate 31, thereby ensuring that the pressure on the sealing gasket 4 is in a balanced and uniform working state. After the reset spring 32 is compressed to the minimum deformation value, the sealing gasket 4 is completely sleeved inside the sealing ring groove 2;

[0030] One end of the adjusting rod 5 is movably connected with a pressure-receiving sphere 6. The pressure-receiving sphere 6 is installed on the other side surface of the elastic pressure-regulating component 3. The other end of the adjusting rod 5 is threadedly connected inside one end of the flange joint 1 and extends to the outside of one end of the flange joint 1;

[0031] The adjusting rod 5 includes a T-shaped threaded rod 51, a limiting sleeve 52, an inclined surface adjusting block 53, and a hexagonal rod 54. One end of the limiting sleeve 52 is fixedly connected to one end of the inclined surface adjusting block 53. The other end of the inclined surface adjusting block 53 is provided with an inclined surface structure, and the inclined surface structure is in fit connection with the surface of the pressure-receiving sphere 6. The pressure-receiving sphere 6 is installed on the surface of one side of the annular pressing plate 31. One end of the T-shaped threaded rod 51 is clamped inside the limiting sleeve 52. The other end of the T-shaped threaded rod 51 is threadedly connected inside one end of the flange joint 1 and extends to the outside of one end of the flange joint 1. One end of the hexagonal rod 54 is installed on the end head of the other end of the T-shaped threaded rod 51. A limiting sleeve plate is sleeved on the surface of the end head of the other end of the T-shaped threaded rod 51 to avoid excessive movement and improve the reliability during the use of the overall device;

[0032] The surface of the inclined surface adjusting block 53 is in fit connection with the inner wall of one side of the sealing ring groove 2 to improve the stability of movement, and the corners of the inclined surface adjusting block 53 are all set as rounded corner structures to avoid scratching the inner wall of the sealing ring groove 2;

[0033] The number of the adjusting rods 5 is the same as the number of the pressure-receiving spheres 6 and is not less than two, thereby realizing uniform pressure adjustment and further ensuring the sealing effect during the use of the sealing gasket 4.

[0034] Working principle:

[0035] Embodiment 1

[0036] For the general service environment with average sealing requirements, the flange joint 1 is connected to the corresponding existing structure and locked by bolts and nuts. During the locking process, the sealing gasket 4 and the elastic pressure regulating component 3 are simultaneously compressed and extruded. The sealing gasket 4 initially seals and fills the gap between the flange joint 1 and the corresponding existing structure. Meanwhile, the return spring 32 inside the elastic pressure regulating component 3 exerts a pressure force on the annular pressing plate 31 and the sealing gasket 4 by utilizing the structural feature of its own elastic reset after being compressed, further enhancing the sealing effect of the sealing gasket 4 on the gap between the flange joint 1 and the corresponding existing structure.

[0037] Embodiment 2

[0038] For the service environment with high sealing requirements, the flange joint 1 is connected to the corresponding existing structure and locked by bolts and nuts. During the locking process, the sealing gasket 4 and the elastic pressure regulating component 3 are simultaneously compressed and extruded. The sealing gasket 4 initially seals and fills the gap between the flange joint 1 and the corresponding existing structure. Meanwhile, the return spring 32 inside the elastic pressure regulating component 3 exerts a pressure force on the annular pressing plate 31 and the sealing gasket 4 by utilizing the structural feature of its own elastic reset after being compressed, further enhancing the sealing effect of the sealing gasket 4 on the gap between the flange joint 1 and the corresponding existing structure;

[0039] Then, adjust the multiple adjusting rods 5 and the multiple pressure - receiving spheres 6 provided in sequence. Specifically, turn the hexagonal rod 54 inside the adjusting rod 5, and then the T - shaped threaded rod 51 rotates and pushes the limit sleeve 52 and the inclined - plane adjusting block 53 under the support of the flange joint 1, so that the inclined - plane structure of the inclined - plane adjusting block 53 gradually approaches and presses the corresponding pressure - receiving sphere 6, thereby increasing the strength of the sealing and re - pressing of the elastic pressure regulating component 3 on the sealing gasket 4, and enhancing the sealing effect of the sealing gasket 4 on the gap between the flange joint 1 and the corresponding existing structure again. The subsequent remaining adjusting rods 5 and pressure - receiving spheres 6 are also operated according to the above steps, thereby realizing the high - tightness use of the flange joint 1.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to this process, method, article or device. At the same time, in the drawings of the present utility model, the filling patterns are only for distinguishing layers and are not subject to any other limitations.

[0041] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A flange joint with high sealing performance, comprising a flange joint (1), characterized in that: One end of the flange joint (1) is internally provided with a sealing ring groove (2), and an elastic pressure regulating component (3), a sealing washer (4), and an adjusting rod (5) are sleeved in the sealing ring groove (2). The elastic structure inside the elastic pressure regulating component (3) extends to be installed on the inner wall on one side of the sealing ring groove (2). One end of the adjusting rod (5) is movably connected to a pressure-receiving sphere (6). The pressure-receiving sphere (6) is installed on the other surface of the elastic pressure regulating component (3). The other end of the adjusting rod (5) is threadedly connected to the inside of one end of the flange joint (1) and extends to the outside of one end of the flange joint (1).

2. The highly-sealed flange joint according to claim 1, characterized in that: The elastic pressure regulating component (3) includes an annular pressing plate (31) and a return spring (32). The return spring (32) serves as the elastic structure inside the elastic pressure regulating component (3), and its two ends are respectively connected to the side surface on one side of the annular pressing plate (31) and the inner wall on one side of the sealing ring groove (2).

3. The highly-sealed flange joint according to claim 2, characterized in that: The side surface on the other side of the annular pressing plate (31) is adhesively connected to one side surface of the sealing washer (4). The annular pressing plate (31) and the sealing washer (4) are both clamped inside the sealing ring groove (2).

4. The high-sealing flange joint according to claim 2, characterized in that: The number of the return springs (32) is not less than two and they are evenly distributed on the surface on one side of the annular pressing plate (31). After the return spring (32) is compressed to the minimum deformation value, the sealing washer (4) is completely sleeved inside the sealing ring groove (2).

5. The high-sealing flange joint according to claim 2, characterized in that: The adjusting rod (5) includes a T-shaped threaded rod (51), a limiting sleeve (52), an inclined surface adjusting block (53), and a hexagonal rod (54). One end of the limiting sleeve (52) is fixedly connected to one end of the inclined surface adjusting block (53). The other end of the inclined surface adjusting block (53) is provided with an inclined surface structure, and the inclined surface structure is in fit connection with the surface of the pressure-receiving sphere (6). The pressure-receiving sphere (6) is installed on the surface on one side of the annular pressing plate (31). One end of the T-shaped threaded rod (51) is clamped inside the limiting sleeve (52). The other end of the T-shaped threaded rod (51) is threadedly connected to the inside of one end of the flange joint (1) and extends to the outside of one end of the flange joint (1).

6. The highly-sealed flange joint according to claim 5, wherein: One end of the hexagonal rod (54) is installed on the end head of the other end of the T-shaped threaded rod (51), and a limiting sleeve plate is sleeved on the surface of the end head of the other end of the T-shaped threaded rod (51).

7. The highly-sealed flange joint according to claim 6, characterized in that: The surface of the inclined surface adjusting block (53) is in fit connection with the inner wall on one side of the sealing ring groove (2), and the corners of the inclined surface adjusting block (53) are all provided with rounded corner structures.

8. The high-sealing flange joint according to claim 1, characterized in that: The number of the adjusting rods (5) is the same as the number of the pressure-receiving spheres (6) and is not less than two.

Images