Flange plate for precise pipeline connection
By setting a double sealing structure of inner and outer seals on the flange, the problems of traditional flanges in high sealing and flexibility are solved, the sealing and convenience in high pressure and high temperature environments are achieved, and the safety and maintainability of the pipeline system are ensured.
Patent Information
- Application Number
- CN202422213651.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-09-10
AI Technical Summary
Traditional flanges cannot meet high sealing requirements, especially in high-pressure, high-temperature or toxic and hazardous media environments, and welding connections limit the flexibility of the piping system and increase maintenance costs.
A flange for precision pipe connection is designed, which adopts a double sealing structure of inner seal and outer seal. The inner seal forms an inner seal through a sealing plug and a sealing socket, and the outer seal forms an outer sealing barrier through a propulsion component and a sealing cover. Combined with a guide and a sliding connection, it ensures sealing and convenience.
It achieves high sealing performance under high pressure and high temperature environment, prevents fluid leakage and external impurities from entering, improves the safety and flexibility of the pipeline system, and reduces maintenance difficulty and cost.
Smart Images
Figure CN223331329U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline connection, in particular to a flange for precision pipeline connection. Background Art
[0002] A flange is a disc-shaped metal body with fixing holes around it, which can connect two pipes or other components very well. The flange is mainly fastened by bolts, which facilitates the quick connection and disassembly of pipes, fittings, valves, etc.
[0003] However, for precision piping systems that require extremely high connection sealing and complex fluid properties, traditional flanges may not be able to meet the needs, especially when facing high pressure, high temperature or toxic and harmful media.
[0004] Although welding connections can provide a high degree of sealing to ensure no leakage, they are not detachable, which limits the flexibility of the piping system. This makes it difficult to inspect or replace parts, increasing maintenance costs and time. To solve the above problems, we propose a flange for precision pipe connections. Utility Model Content
[0005] The purpose of the utility model is to provide a flange for connecting precision pipes to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a flange plate for connecting precision pipelines, comprising two flange bodies, the two flange bodies being fixedly connected to connecting pipes on the back sides thereof, the pipe openings of the two flange bodies being provided with plug-in inner seals, one of the connecting pipes being provided with a propulsion assembly, the propulsion assembly being provided with an outer seal for covering the connection between the two flange bodies, the outer seal being slidably connected to the two flange bodies.
[0007] According to the above technical solution, the propulsion assembly includes an externally threaded sleeve fixedly connected to the outer seal, and the outer wall of the connecting pipe is rotatably connected to an internally threaded sleeve threadedly connected to the externally threaded sleeve, wherein a guide is provided between the externally threaded sleeve and the connecting pipe.
[0008] According to the above technical solution, an annular groove is provided on the outer wall of the connecting pipe, and the internally threaded sleeve is arranged in the annular groove.
[0009] According to the above technical solution, the guide member includes a guide protrusion fixedly connected to the inner wall of the external threaded sleeve, the outer wall of the connecting pipe is provided with a guide groove, and the guide protrusion is slidably connected to the inner wall of the guide groove.
[0010] According to the above technical solution, the inner seal includes a sealing plug-in and a sealing socket arranged on opposite sides of the two flange bodies. The sealing plug-in is coaxially fixed to one of the flange bodies, the sealing socket is connected to the connecting pipe on the same side, and the sealing plug-in is slidably connected to the inner wall of the sealing socket.
[0011] According to the above technical solution, a sealing rubber ring is embedded in the bottom of the groove of the sealing socket, and a sealing ring groove is provided at one end of the sealing plug-in unit facing the bottom of the groove of the sealing socket.
[0012] According to the above technical solution, the outer seal includes a sealing cover that is slidably connected to the outer walls of the two flange bodies, the sealing cover is slidably sleeved on the outer wall of the connecting pipe, and the sealing cover is connected to the propulsion assembly.
[0013] According to the above technical solution, a sliding sealing ring is fixedly connected to the inner wall of the sealing cover and is slidably connected to the outer walls of the two flange bodies.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] The utility model realizes internal and external double sealing by providing an inner seal and an outer seal. When the two flange bodies are fixed together by bolts, the sealing plug is tightly inserted into the sealing socket to form a first inner sealing structure to achieve a good sealing effect. After the two flange bodies are fixed by bolts, the propulsion assembly can move the sealing cover to the connection of the flange bodies to form an external sealing barrier, further increasing the sealing performance, and also effectively preventing external impurities from entering the flange connection, thereby protecting the internal environment of the pipeline system and ensuring safe and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the overall structure of the flange of the utility model;
[0017] Figure 2 is a schematic diagram of the propulsion assembly of the utility model;
[0018] Figure 3 This is a schematic diagram of the annular groove on the connecting pipe of the utility model;
[0019] Figure 4 It is a schematic diagram of the inner seal of the utility model;
[0020] Figure 5 It is a front view schematic diagram of the flange body of the utility model;
[0021] Figure 6 It is a schematic diagram of the flange body and the connecting pipe of the utility model.
[0022] In the picture:
[0023] 1. Flange body; 2. Connecting pipe; 3. Inner seal; 31. Sealing plug-in; 32. Sealing socket; 33. Sealing rubber ring; 34. Sealing ring groove; 4. Propulsion assembly; 41. Externally threaded sleeve; 42. Internally threaded sleeve; 43. Ring groove; 5. External seal; 51. Sealing cover; 52. Sliding sealing ring. DETAILED DESCRIPTION
[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0025] See also Figure 1-6 The utility model provides a flange technical solution for precision pipe connection: it includes two flange bodies 1, the two flange bodies 1 are circular disc-shaped structures, and are made of high-strength and corrosion-resistant metal materials. One of them is evenly distributed with multiple connection holes, and the other is provided with threaded holes corresponding to the connection holes one by one for installing fastening bolts, which is convenient for maintenance or replacement of parts.
[0026] The two flange bodies 1 are fixedly connected with connecting pipes 2 on the back sides. The connecting pipes 2 are firmly connected to the flange bodies 1 by welding. The material of the connecting pipes 2 is the same as that of the flange bodies 1. The length of the connecting pipes 2 can be adjusted according to actual installation requirements to adapt to different pipeline layouts.
[0027] The pipe openings of the two flange bodies 1 are provided with plug-in inner seals 3. When the two flange bodies 1 are fixed together by bolts, the inner seals 3 seal the pipe openings of the two flange bodies 1 through the pressure between the flange bodies 1.
[0028] A propulsion assembly 4 is provided on one of the connecting pipes 2, and an outer seal 5 for covering the connection between the two flange bodies 1 is provided on the propulsion assembly 4. The outer seal 5 is slidably connected to the two flange bodies 1. After the two flange bodies 1 are fixed together by bolts, the outer seal 5 can be driven by the propulsion assembly 4 to cover the connection between the two flange bodies 1, forming a reliable external sealing barrier to further achieve a good sealing effect.
[0029] Specifically, the propulsion assembly 4 primarily consists of an externally threaded sleeve 41 securely attached to the outer seal 5 and an internally threaded sleeve 42 rotatably connected to the outer wall of the connecting tube 2. A guide member is provided between the externally threaded sleeve 41 and the connecting tube 2 to ensure stability and accuracy during movement of the externally threaded sleeve 41.
[0030] After the two flange bodies 1 are bolted together, rotating the internally threaded sleeve 42 drives the externally threaded sleeve 41 to move, thereby driving the outer seal 5 to cover the connection between the two flange bodies 1, further improving the sealing effect. The outer seal 5 is slidably connected to both flange bodies 1 and can fit tightly at the connection between the flange bodies 1, effectively preventing fluid leakage from the connection.
[0031] Specifically, an annular groove 43 is formed on the outer wall of the connecting pipe 2, and the internally threaded sleeve 42 is disposed within the annular groove 43. This makes the installation of the internally threaded sleeve 42 on the connecting pipe 2 more stable and prevents axial or radial displacement. Furthermore, the annular groove 43 provides a specific installation position for the internally threaded sleeve 42, making the entire propulsion assembly 4 more compact, reducing the space occupied, and facilitating pipe connection operations within limited space.
[0032] Moreover, this design also makes the internal threaded sleeve 42 smoother during rotation operation without being excessively disturbed by external factors, thereby being able to more accurately drive the external threaded sleeve 41 to move, achieving precise control of the external seal 5, and further improving the sealing performance and operational convenience of the flange.
[0033] Specifically, the guide member includes a guide protrusion fixedly connected to the inner wall of the external threaded sleeve 41, and the outer wall of the connecting pipe 2 is provided with a guide groove, and the guide protrusion is slidably connected to the inner wall of the guide groove;
[0034] Specifically, the guide member comprises a guide protrusion fixedly connected to the inner wall of the externally threaded sleeve 41 and a guide groove provided on the outer wall of the connecting tube 2. The guide protrusion tightly slides with the inner wall of the guide groove, ensuring that the externally threaded sleeve 41 maintains a clear direction and a stable trajectory as it moves axially along the connecting tube 2. The sliding of the guide protrusion within the guide groove effectively prevents the externally threaded sleeve 41 from rotating or deflecting, ensuring that the externally threaded sleeve 41 can move precisely and only along the axial direction of the connecting tube 2.
[0035] Specifically, the inner seal 3 comprises a sealing insert 31 and a sealing socket 32, disposed on opposite sides of the two flange bodies 1. The sealing insert 31 is coaxially fixedly connected to one of the flange bodies 1, ensuring a stable and leak-tight connection. The sealing socket 32 communicates with the connecting pipe 2 on the same side. The sealing insert 31 slides against the inner wall of the sealing socket 32. The sealing insert 31 and the sealing socket 32 are plugged together, so that the contact plane between the two flange bodies 1 and the contact surface between the sealing insert 31 and the sealing socket 32 are not aligned, thus improving the sealing performance.
[0036] When the two flange bodies 1 are fastened together by bolts, the sealing insert 31 can be tightly inserted into the sealing socket 32, forming an effective sealing structure, preventing fluid leakage from the pipe openings of the two flange bodies 1, and further enhancing the sealing effect of the inner seal 3. At the same time, this sliding connection method also facilitates installation and disassembly, making it more convenient and quick to inspect and maintain the pipeline system.
[0037] Specifically, a sealing rubber ring 33 is embedded in the groove bottom of the sealing socket 32 . The presence of the sealing rubber ring 33 can further enhance the sealing performance and effectively prevent fluid from leaking from the connection between the sealing socket 32 and the sealing plug 31 .
[0038] At the same time, a sealing ring groove 34 is provided on the end of the sealing insert 31 that faces the bottom of the sealing socket 32. When the sealing insert 31 is inserted into the sealing socket 32, the sealing rubber ring 33 partially sinks into the sealing ring groove 34, forming a tighter seal. This design not only increases the sealing contact area and improves the sealing effect, but also adapts to varying pressure and temperature fluctuations to a certain extent, ensuring that the pipeline system maintains a good seal under various operating conditions. The provision of the sealing ring groove 34 also helps guide the sealing insert 31 accurately into the sealing socket 32, improving the convenience and accuracy of installation.
[0039] Specifically, the outer seal 5 includes a sealing cover 51 that is slidingly connected to the outer walls of the two flange bodies 1. The sealing cover 51 is slidably sleeved on the outer wall of the connecting pipe 2. The sealing cover 51 fits tightly on the outer wall of the flange body 1, forming a reliable external sealing barrier, further increasing the sealing performance. At the same time, it also effectively prevents external impurities, dust and moisture from entering the flange connection, thereby protecting the internal environment between the two flanges (sealing pads, gaskets, etc.), ensuring the safe and stable operation of the pipeline system.
[0040] The sealing housing 51 is connected to the push assembly 4. Once the two flange bodies 1 are bolted together, the push assembly 4 can be used to move the sealing housing 51 to the connection between the two flange bodies 1, achieving internal and external sealing. Furthermore, the sliding connection of the sealing housing 51 facilitates installation and removal, facilitating maintenance and overhaul of the piping system.
[0041] Specifically, a sliding sealing ring 52 is fixedly attached to the inner wall of the sealing housing 51, which slides in contact with the outer walls of the two flange bodies 1. The provision of the sliding sealing ring 52 further enhances the sealing performance of the outer seal 5. When the sealing housing 51 is moved to the connection between the two flange bodies 1 by the propulsion assembly 4, the sliding sealing ring 52 tightly fits against the outer walls of the flange bodies 1, forming an effective seal. The sliding sealing ring 52 can be made of a material with excellent elasticity and wear resistance to adapt to different working environments and usage requirements, thereby extending the service life of the outer seal 5.
[0042] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0043] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one such feature.
[0044] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.
[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A flange for connecting precision pipes, comprising two flange bodies (1), with connecting pipes (2) fixedly connected to the opposite sides of the two flange bodies (1), characterized in that: The pipe openings of the two flange bodies (1) are provided with plug-in matching inner seals (3), one of the connecting pipes (2) is provided with a propulsion assembly (4), and the propulsion assembly (4) is provided with an outer seal (5) for covering the connection between the two flange bodies (1), and the outer seal (5) is slidably connected to the two flange bodies (1).
2. The flange for connecting precision pipes according to claim 1, characterized in that: The propulsion assembly (4) comprises an externally threaded sleeve (41) fixedly connected to an external sealing member (5); the outer wall of the connecting pipe (2) is rotatably connected to an internally threaded sleeve (42) threadedly connected to the externally threaded sleeve (41); and a guide member is provided between the externally threaded sleeve (41) and the connecting pipe (2).
3. The flange for connecting precision pipes according to claim 2, characterized in that: An annular groove (43) is provided on the outer wall of the connecting pipe (2), and the internal thread sleeve (42) is arranged in the annular groove (43).
4. The flange for connecting precision pipes according to claim 2, characterized in that: The guide member comprises a guide protrusion fixedly connected to the inner wall of the external threaded sleeve (41); the outer wall of the connecting pipe (2) is provided with a guide slot, and the guide protrusion is slidably connected to the inner wall of the guide slot.
5. The flange for connecting precision pipes according to claim 1, characterized in that: The inner seal (3) comprises a sealing plug-in (31) and a sealing socket (32) arranged on opposite sides of the two flange bodies (1); the sealing plug-in (31) is coaxially fixedly connected to one of the flange bodies (1); the sealing socket (32) is connected to the connecting pipe (2) on the same side; and the sealing plug-in (31) is slidably connected to the inner wall of the sealing socket (32).
6. The flange for connecting precision pipes according to claim 5, characterized in that: A sealing rubber ring (33) is embedded in the groove bottom of the sealing socket (32), and a sealing ring groove (34) is provided at one end of the sealing plug (31) facing the groove bottom of the sealing socket (32).
7. The flange for connecting precision pipes according to claim 1, characterized in that: The outer seal (5) comprises a sealing cover (51) slidably connected to the outer walls of the two flange bodies (1), the sealing cover (51) is slidably sleeved on the outer wall of the connecting pipe (2), and the sealing cover (51) is connected to the propulsion assembly (4).
8. The flange for connecting precision pipes according to claim 7, characterized in that: The inner wall of the sealing housing (51) is fixedly connected with a sliding sealing ring (52) which is slidably connected to the outer walls of the two flange bodies (1).