Combined gasket and turbine
By designing a combined sealing gasket with a circular body and plug-in components, the problems of inconvenient plugging and loosening are solved, achieving a highly efficient and stable sealing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HESHENG POWER (SHANSHAN) CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-12
AI Technical Summary
Existing modular sealing gaskets are inconvenient to insert and are prone to loosening, resulting in a cumbersome installation process and poor sealing performance.
A combined sealing gasket comprising a circular body, an annular sealing line, a hollow compression groove, and a telescopic groove was designed. It adopts a plug-in and socket structure, and ensures accurate and stable connection through the design of plug-in components and sealing rings.
It achieves high efficiency and stability in the insertion process, avoids loosening and leakage of the sealing gasket during use, and improves the sealing effect.
Smart Images
Figure CN224352377U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing gaskets, and in particular to a combined sealing gasket and a steam turbine using the gasket. Background Technology
[0002] A gasket is a sealing body placed in the joint surface of a pipe, container, or assembly to prevent the penetration of media, aiming to prevent leakage of the media inside the pipe or assembly. Taking a steam turbine as an example, gaskets are used at the cylinder flange connection surfaces, valve flange connection surfaces, inner cover flanges, end covers, etc. Steam turbine gaskets need to withstand complex operating conditions, so under some extreme conditions, the frequency of gasket failure is relatively high, resulting in a relatively high frequency of replacement. In the current technology, in order to improve the efficiency of replacement operations, combined gaskets are often used.
[0003] However, when installing the two bodies of the existing combined sealing gasket, it is very inconvenient to insert the pin and socket. It is difficult to make it accurate on the first try and multiple attempts are required, which makes the installation process more complicated and reduces work efficiency. Moreover, the two bodies sometimes become loose after being snapped together, resulting in poor stability. Summary of the Invention
[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide a modular sealing gasket that is easy to insert, which solves the technical problems of the existing modular sealing gaskets being inconvenient to insert and easy to loosen after insertion, resulting in poor sealing effect.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] The combined sealing gasket includes:
[0007] A circular body includes a first circular body and a second circular body with identical structures that can be inserted together. Each circular body has a through hole at its center. An annular sealing line is disposed on the corresponding upper and lower surfaces of the circular bodies and is concentric with the through hole. A hollow compression groove is disposed within the circular body corresponding to the annular sealing line and follows the trajectory of the annular sealing line. A telescopic groove is disposed on the outer waist side of the circular body, and the surface of the telescopic groove is coated with a corrosion-resistant layer. The first and second circular bodies have corresponding inserts and sockets on their facing surfaces. An insertion assembly is fixedly connected to the surface of the insert, and the socket has a mating groove that matches the insertion assembly. A sealing ring is also fitted onto the surface of the insert, and the sealing ring is adjacent to the top of the insertion assembly. In use, the insertion assembly is sealed and snapped into the mating groove, and the sealing ring is snapped into the inner wall of the socket.
[0008] In this invention, the insert is cylindrical with an inner diameter smaller than that of the socket. When the first and second circular bodies are connected, the insert can be easily and accurately inserted into the socket in one go, improving work efficiency. Simultaneously, after the insertion assembly on the insert engages with the mating groove, the sealing ring is pressed against the inner wall of the socket, tightly adhering to it. This secure connection minimizes loosening and improves the sealing effect at the connection between the first and second circular bodies, preventing leakage during use. This invention allows for accurate and one-time connection of the two bodies, providing strong stability and a good sealing effect after engagement.
[0009] Optionally, the inner diameter of the insert is slightly smaller than the inner diameter of the socket, and the outer diameter of the sealing ring is slightly larger than the inner diameter of the socket.
[0010] Optionally, two sets of the insertion components and their matching mating grooves are used. The two sets of insertion components are symmetrically fixed to the outer wall of the insertion post along its central axis. The two sets of mating grooves are located on both sides of the socket corresponding to the insertion components. This helps to further improve the sealing and locking connection between the insertion post and the socket, completely avoiding loosening after locking, and improving the stability of the connection between the two circular bodies.
[0011] Optionally, the insertion assembly includes: a mating block fixed to the outer wall of the insertion post, with its top adjacent to the sealing ring; and a fixing block fixed to the bottom surface of the mating block, located at the center of the bottom of the mating block; wherein, the bottom of the mating groove has a recess, and in use, the mating block is engaged with the horizontal portion inside the mating groove, and the fixing block is inserted into the recess. The cooperation between the fixing block and the recess further increases the stability of the connection between the first circular body and the second circular body.
[0012] Optionally, a magnet is provided on the side of the insertion post opposite to the socket where they meet. By adding a magnet, the principle of attraction between the anode and cathode of the magnet helps to quickly locate the socket when inserting the insertion post, and also increases the stability after the connection is made, thus improving the sealing effect.
[0013] Optionally, the number of the annular sealing lines is at least two.
[0014] Optionally, the upper and lower surfaces of the circular body are provided with a sealing coating that extends no more than half the height of the annular sealing line.
[0015] By adding a sealing coating and a sealing line, the sealing performance of this utility model can be improved.
[0016] Optionally, the hollow compression groove is circular or rectangular in shape, and the number of hollow compression grooves is the same as the number of annular sealing lines.
[0017] Optionally, the expansion groove is trapezoidal in shape.
[0018] The hollow compression groove inside the circular body and the telescopic groove on the waist side help this invention to achieve greater elastic deformation and a better sealing pressure.
[0019] Optionally, the inner surface of the through hole is coated with a self-lubricating layer, which is one of polyimide, polyetheretherketone, or polytetrafluoroethylene. This facilitates the assembly of the sealing gasket.
[0020] Based on the same inventive concept, this utility model also proposes a steam turbine applied to the above-mentioned sealing gasket.
[0021] The beneficial effects of this utility model are:
[0022] In this invention, the insert is cylindrical with an inner diameter smaller than that of the socket. When the first and second circular bodies are connected, the insert can be easily and accurately inserted into the socket in one go, improving work efficiency. Simultaneously, after the insertion assembly on the insert engages with the mating groove, the sealing ring is pressed against the inner wall of the socket, tightly adhering to it. This secure connection minimizes loosening and improves the sealing effect at the connection between the first and second circular bodies, preventing leakage during use. This invention allows for accurate and one-time connection of the two bodies, providing strong stability and a good sealing effect after engagement. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the structure of this utility model.
[0025] Figure 2 This is a schematic diagram of the structure of the first circular body in this utility model.
[0026] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.
[0027] Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle.
[0028] Figure 5 This utility model is shown in a cross-sectional view.
[0029] Figure label:
[0030] 10. First circular body; 11. Second circular body;
[0031] 2. Through holes; 20. Self-lubricating layer;
[0032] 3. Annular sealing line; 4. Sealing coating; 5. Expansion groove; 50. Corrosion-resistant layer; 6. Hollow compression groove;
[0033] 7. Insert post; 70. Connecting block; 71. Fixing block; 72. Sealing ring;
[0034] 8. Socket; 80. Butt groove; 81. Groove;
[0035] 9. Magnet. Detailed Implementation
[0036] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of this utility model application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0037] In the description of the embodiments of this utility model application, it should be understood that the terms "center", "upper", "lower", "front", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model application.
[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model application, "multiple" means two or more, unless otherwise explicitly specified.
[0039] In the embodiments of this utility model application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model application according to the specific circumstances.
[0040] In the embodiments of this utility model application, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0041] The following disclosure provides many different implementations or examples for carrying out different structures of the embodiments of this utility model application. To simplify the disclosure of the embodiments of this utility model application, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of this utility model application. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of this utility model application; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.
[0042] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0043] In the existing technology, when installing the first circular body 10 and the second circular body 11 in a combined sealing gasket, the insertion post 7 and the socket 8 are inconvenient to connect, making it difficult to achieve an accurate connection on the first attempt and requiring multiple attempts. This makes the installation process cumbersome and reduces work efficiency. Moreover, the two circular bodies may become loose after being snapped together, resulting in poor stability. Under such circumstances, bonding with a water-based colloidal inorganic adhesive will obviously affect the sealing effect of the sealing gasket.
[0044] like Figures 1-5 As shown in the figure, the present utility model application provides a modular sealing gasket that is easy to insert, including: a circular body, the circular body including two identical structures that can be inserted together, a first circular body 10 and a second circular body 11.
[0045] The circular body has a through hole 2 in the center, and the inner surface of the through hole is coated with a self-lubricating layer 20, which is one of polyimide, polyether ether ketone, or polytetrafluoroethylene.
[0046] The upper and lower surfaces of the circular body are provided with annular sealing lines 3 concentric with the through hole 2, and there are at least two annular sealing lines 3; the circular body corresponding to the annular sealing lines 3 is provided with a hollow compression groove 6 that is consistent with the trajectory of the annular sealing lines 3; the outer waist side of the circular body is provided with a telescopic groove 5, and the surface of the telescopic groove 5 is coated with a corrosion-resistant layer 50.
[0047] The hollow compression groove 6 is circular or rectangular in shape, and the number of hollow compression grooves 6 is the same as the number of annular sealing lines 3. The expansion groove 5 is preferably trapezoidal in shape, as the trapezoidal shape allows the gasket to achieve a more optimal compression ratio.
[0048] The upper and lower surfaces of the circular body are provided with a sealing coating 4 extending no more than half the height of the annular sealing line 3. The sealing coating 4 is nitrile rubber or silicone. In this embodiment, the sealing coating 4 can be nitrile rubber, silicone, or an elastic colloid that can be firmly bonded to the sealing gasket. The sealing coating 4 can be applied by brushing onto the inner and outer edges of a single stamped sealing gasket, or by pre-stacking the sealing gaskets into a stack and then applying the sealing coating 4 to the inner and outer edges of the gaskets by spraying.
[0049] The first circular body 10 and the second circular body 11 are provided with corresponding inserts 7 and sockets 8 on their facing surfaces. After the inserts 7 and sockets 8 are inserted, the first circular body 10 and the second circular body 11 can be combined into a complete sealing gasket. After insertion, they are bonded together with a water-based colloidal inorganic adhesive.
[0050] A plug-in assembly is fixedly connected to the outer surface of the plug 7. The socket 8 is provided with a mating groove 80 that matches the plug-in assembly. A sealing ring 72 is also fixedly provided on the surface of the plug 7. The sealing ring 72 is located above the plug-in assembly. The plug 7 has a cylindrical structure, and the sealing ring 72 is sleeved on the outer wall of the plug 7.
[0051] Two sets of plug-in components and matching mating grooves 80 are used. The two sets of plug-in components are symmetrically fixed to the outer wall of the plug 7 along the central axis of the plug 7, and the two sets of mating grooves 80 are symmetrically arranged on both sides of the socket 8 along the central axis of the socket 8. The inner diameter of the plug 7 is slightly smaller than the inner diameter of the socket 8, and the outer diameter of the sealing ring 72 is slightly larger than the inner diameter of the socket 8. When the first circular body 10 and the second circular body 11 are engaged, the plug-in components are sealed and engaged in the corresponding mating grooves 80, and the sealing ring 72 is pressed and connected to the inner wall of the socket 8.
[0052] Specifically, the plug-in assembly includes a docking block 70 and a fixing block 71. The docking block 70 is fixed to the outer wall of the plug post 7 and is positioned close to the sealing ring 72 at its top. The fixing block 71 is fixed to the bottom surface of the docking block 70 and is located at the middle of the bottom of the docking block 70. The inner diameter of the docking block 70 is adapted to the inner diameter of the horizontal portion inside the docking groove 80. The bottom of the docking groove 80 has a groove 81, and the fixing block 71 is adapted to the groove 81.
[0053] When the first circular body 10 and the second circular body 11 are engaged, the mating block 70 is engaged in the horizontal part inside the mating groove 80, the fixing block 71 is inserted into the groove 81, and the sealing ring 72 is pressed and connected to the inner wall of the socket 8, so that the insert 7 and the socket 8 are completely sealed together and will not loosen at will.
[0054] A magnet 9 is also provided on the surface of the insert 7 that is opposite to the socket 8 when they are inserted. That is, the magnet 9 is set on the front end surface of the insert 7 and the inner bottom surface of the socket 8. By utilizing the principle of mutual attraction between the anode and cathode of the magnet, the insert 7 can quickly find the socket 8. When the first circular body 10 and the second circular body 11 are engaged, it can increase its stability, avoid loosening, and improve the sealing effect.
[0055] Based on the foregoing embodiments, this utility model also discloses a steam turbine that is applied to the aforementioned sealing gasket.
[0056] Although specific embodiments of the present invention have been described above, those skilled in the art should understand that various changes or modifications can be made to these embodiments without departing from the principles and essence of the present invention, and all such changes and modifications fall within the protection scope of the present invention.
Claims
1. A combined sealing gasket, characterized in that, include: The circular body includes a first circular body (10) and a second circular body (11) with the same structure that can be plugged together, and the circular body has a through hole (2) at the center. An annular sealing line (3) is provided on the corresponding upper and lower surfaces of the circular body and is concentric with the through hole (2); A hollow compression groove (6) is disposed in the circular body corresponding to the annular sealing line (3) and is consistent with the trajectory of the annular sealing line (3); The expansion groove (5) is located on the outer side of the circular body, and the surface of the expansion groove (5) is coated with a corrosion-resistant layer (50). The first circular body (10) and the second circular body (11) are provided with corresponding inserts (7) and sockets (8) facing each other. The inserts (7) are fixedly connected to the surface of the inserts (7). The sockets (8) are provided with mating grooves (80) that match the inserts (7). The inserts (7) are also fitted with sealing rings (72). The sealing rings (72) are close to the top of the inserts (7). In use, the inserts (7) are sealed and snapped into the mating grooves (80), and the sealing rings (72) are snapped into the inner wall of the sockets (8).
2. The combined sealing gasket according to claim 1, characterized in that, The inner diameter of the insert (7) is slightly smaller than the inner diameter of the socket (8), and the outer diameter of the sealing ring (72) is slightly larger than the inner diameter of the socket (8).
3. The combined sealing gasket according to claim 2, characterized in that, The plug-in assembly and the matching mating groove (80) are both in two sets. The two sets of plug-in assemblies are symmetrically fixed on the outer wall of the plug (7) along the central axis of the plug (7). The two sets of mating grooves (80) are opened on both sides of the socket (8) corresponding to the plug-in assembly.
4. The combined sealing gasket according to claim 1, 2 or 3, characterized in that, The plug-in assembly includes: The docking block (70) is fixed to the outer wall of the insert (7), and its top is set close to the sealing ring (72); A fixing block (71) is fixed to the bottom surface of the docking block (70) and is located at the middle of the bottom of the docking block (70); The bottom of the docking groove (80) has a groove (81). When in use, the docking block (70) is engaged with the horizontal part inside the docking groove (80), and the fixing block (71) is inserted into the groove (81).
5. The combined sealing gasket according to claim 4, characterized in that, A magnet (9) is provided on the side opposite to the splice of the insert (7) and the socket (8).
6. The combined sealing gasket according to claim 1, characterized in that, The number of the annular sealing lines (3) is at least two.
7. The combined sealing gasket according to claim 1, characterized in that, The hollow compression groove (6) is circular or rectangular in shape, and the number of hollow compression grooves (6) is the same as the number of annular sealing lines (3).
8. The combined sealing gasket according to claim 1, characterized in that, The expansion groove (5) is trapezoidal in shape.
9. The combined sealing gasket according to claim 1, characterized in that, The upper and lower surfaces of the circular body are provided with a sealing coating (4) that does not exceed half the height of the annular sealing line (3).
10. A steam turbine, characterized in that, Includes the combined sealing gasket as described in any one of claims 1-9.