Pipeline butt flange device without flow choking

Abstract

The utility model belongs to the technical field of mechanical engineering, and particularly relates to a choked-flow-free pipeline butt flange device which comprises a flange body part I, a flange body part II and an annular sealing gasket. The flange body piece I comprises a sleeve part I, a flange part I and a bottom ring groove I. The flange body piece II comprises a sleeve part II, a flange part II and a top ring groove II. The sleeve part I and the sleeve part II are respectively and axially provided with an unimpeded channel in a penetrating manner, the flange part I is provided with a flange hole I, and the flange part II is provided with a flange hole II. Bolt assemblies penetrate through the corresponding flange holes I and the corresponding flange holes II, so that the flange body piece I and the flange body piece II are connected in a fastened mode, and the annular sealing gasket is tightly wrapped by the annular groove I and the annular groove II. According to the technical scheme, the completely embedded design of the annular sealing gasket is achieved, flow choking caused by deformation and dislocation of the annular sealing gasket is avoided, concentric butt joint of flanges can be ensured, the structure is reasonable, practicability is high, the high application value is achieved in the field of pipeline connection, and the sealing gasket can be widely applied to various industrial scenes.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical engineering, and in particular relates to a non-obstructive pipeline butt flange device. Background Art

[0002] In modern industry, the reliability and efficiency of pipeline connections are crucial. Traditional flange connection structures often have some shortcomings in practical applications. On the one hand, existing flange connection structures are diverse, but many flanges are prone to generating large flow resistance when connecting pipes due to unreasonable structural design. This not only reduces the efficiency of fluid transportation and increases energy consumption, but also may affect the stability of the pipeline system due to pressure changes caused by flow resistance. In particular, in industries with high requirements for fluid transportation efficiency, such as petrochemicals, pharmaceuticals, and food processing, flow resistance has become a major factor restricting production efficiency and quality. On the other hand, the sealing performance of traditional flange connections needs to be improved. During long-term use, due to the imperfect sealing structure, leakage is prone to occur, which not only wastes resources, but also may pollute the environment and even cause safety accidents. Moreover, some flange connection structures are complex, and the installation and disassembly process is cumbersome, increasing maintenance costs and time.

[0003] The flange structure of the prior art is as follows Figure 7 and Figure 8 As shown. Figure 7 It is an integrated flange, including a flange body welded to the pipe, a flat annular sealing gasket and a bolt assembly (not shown). Figure 8 It is a slip-on flange, which includes a butt-weld ring, slip-on flange, flat annular gasket and bolt assembly (not shown). The bolt assembly applies pressure to the two flanges, causing the flat annular gasket to deform and seal. The defects are:

[0004] 1) The flange hole is generally larger than the connecting bolt (taking M16 bolt as an example, its flange hole is generally Φ18). During connection, a certain degree of misalignment is inevitable, resulting in transitional steps and dead angles, which increase flow resistance.

[0005] 2) The flanges are connected by crimping flat annular gaskets, which have obvious transition steps. Because the annular gasket is active during crimping, if the worker does not operate it properly, the annular gasket will produce serious eccentricity, which not only increases the flow resistance, but also has a certain risk of leakage, and has high operational requirements for workers. Summary of the Invention

[0006] In response to the shortcomings of the above-mentioned existing technologies, this technical solution proposes a non-obstructive pipe butt flange device, which aims to reduce flow resistance, improve sealing performance, and simplify installation and maintenance processes through innovative design to meet the needs of modern industry for efficient and reliable pipe connections.

[0007] Specifically, the above objectives are achieved through the following technical solutions:

[0008] A non-obstructed pipe joint flange device comprises a flange body part I, a flange body part II, and an annular sealing gasket. The flange body part I comprises a coaxially arranged sleeve part I and a flange part I; an unobstructed passage is axially penetrated through the sleeve part I, and an annular groove I is provided at the bottom of the sleeve part I for embedding the annular sealing gasket; a plurality of flange holes I for mounting bolt assemblies are provided at intervals along the circumference of the sleeve part I. The flange body part II comprises a coaxially arranged sleeve part II and a flange part II; an unobstructed passage is axially penetrated through the sleeve part II, and an annular groove II is provided at the top of the sleeve part II for embedding the annular sealing gasket; a plurality of flange holes II corresponding to the flange holes I are provided at intervals along the circumference of the sleeve part II. A plurality of mounting bolt assemblies penetrate the flange holes I and the flange holes II in a one-to-one correspondence, so that the flange body part I and the flange body part II are tightly connected; the annular groove I cooperates with the annular groove II to tightly wrap the annular sealing gasket.

[0009] Preferably, an annular sealing platform is provided at the bottom of the sleeve portion I of the flange body member I and / or at the top of the sleeve portion II of the flange body member II. When an annular sealing platform is provided at the bottom of the sleeve portion I of the flange body member I, the annular groove I is correspondingly provided on the annular sealing platform. When an annular sealing platform is provided at the top of the sleeve portion II of the flange body member II, the annular groove II is correspondingly provided on the annular sealing platform.

[0010] Preferably, the cross-sections of the annular groove I and the annular groove II both present a "convex"-shaped stepped structure.

[0011] Preferably, the unobstructed passage includes a connecting portion and a connecting portion, the diameter of the connecting portion is consistent with the outer diameter of the connected pipe, and the diameter of the connecting portion is consistent with the inner diameter of the connected pipe.

[0012] Preferably, an annular fixed axis protrusion is provided at the bottom of the sleeve part I of the flange body part I along the edge of the unobstructed channel; an annular fixed axis groove adapted to the annular fixed axis protrusion is provided at the top of the sleeve part II of the flange body part II along the edge of the unobstructed channel.

[0013] Preferably, the flange body part I is arranged as an integral structure, and a pipeline welding boss I is provided on the top of the sleeve part I.

[0014] Preferably, the flange body II is arranged as an integral structure, and a pipeline welding boss II is provided at the bottom of the sleeve portion II.

[0015] Preferably, the flange body part I is arranged in a slip-on fitting structure, including a slip-on flange I and a butt-welding ring I, and the butt-welding ring I is axially wedge-fitted with the slip-on flange I; the flange hole I is arranged on the slip-on flange I, and the ring groove I is arranged on the butt-welding ring I.

[0016] Preferably, the flange body II is arranged in a slip-on fitting structure, including a slip-on flange II and a butt-welding ring II, and the butt-welding ring II is axially wedge-fitted with the slip-on flange II; the flange hole II is arranged on the slip-on flange II, and the ring groove II is arranged on the butt-welding ring II.

[0017] Preferably, the flange body part I and the flange body part II are made of stainless steel material with a numerical code of S30408 ​​or above.

[0018] Compared with the existing technology, this technical solution has the following advantages:

[0019] 1) This technical solution can improve fluid transportation efficiency and reduce flow resistance. Specifically: First, the annular sealing gasket is fully embedded in the design, so that the flange body part I and the flange body part II are completely concentrically connected, avoiding the deformation of the annular sealing gasket and the misalignment of the flange body part I and the flange body part II, effectively solving the problem of flow obstruction caused by the misalignment gap. Secondly, the unobstructed channel inside the flange body part I and the flange body part II, the diameters of the connecting part and the connecting part are respectively consistent with the outer diameter and inner diameter of the connected pipe, so that the space for fluid flow is smoothly transitioned after the pipe is connected, avoiding the flow obstruction caused by unreasonable structure in traditional flange connection, effectively reducing energy consumption and improving fluid transportation efficiency.

[0020] 2) This technical solution enhances sealing performance. Specifically: First, the provision of an annular sealing platform, annular groove I, and annular groove II can better secure the annular sealing gasket and prevent it from shifting during use. Compared with the traditional flat annular sealing gasket crimping method, this effectively reduces the risk of leakage. Second, annular grooves I and II have a special annular groove structure with a "convex" stepped structure, which makes the cross-section of the annular sealing gasket have a corresponding special shape, better fitting into the annular groove, further enhancing the stability of the annular sealing gasket, avoiding leakage caused by eccentricity of the annular sealing gasket, and improving the sealing effect.

[0021] 3) This technical solution achieves a perfect combination of structural stability and installation flexibility. Specifically, the integrated structure of flange body I ensures its high strength and stability, enabling it to reliably withstand pressure and tension during pipe connections, providing a solid foundation for the entire connection system. The slip-on structure of flange body II, on the other hand, provides great flexibility during installation. Loose-slip flange II can be easily fitted onto the pipe, while the axial wedge-shaped fit between butt-weld ring II and slip-on flange II allows for more precise installation and accommodates certain installation errors. The combination of these two ensures both a secure connection and convenient installation.

[0022] 4) This technical solution adapts to a variety of working conditions. Specifically, the integral flange body I maintains stable performance under a variety of harsh working conditions, while the loose-fit flange body II can be adjusted and adapted to different pipe diameters, materials, and installation environments. Whether in new pipeline projects or renovations of existing pipeline systems, this combination can meet diverse working conditions and demonstrates strong versatility and applicability.

[0023] 5) This technical solution improves connection stability. Specifically, the design of the annular fixed axis structure ensures that flange body I and flange body II are radially constrained when docked, eliminating any significant gap between them and preventing radial misalignment. This enhances the tightness and stability of the flange connection and ensures the reliability of the pipeline connection.

[0024] 6) This technical solution utilizes rational material selection, using stainless steel with a numerical code of S30408 ​​or higher. This material possesses excellent strength and corrosion resistance, ensuring the stability of the flange assembly during long-term use and adaptability to various industrial environments. Furthermore, due to the excellent mechanical properties of this material, while maintaining virtually unchanged elongation, both tensile strength and the specified plastic deformation strength can be effectively increased. This allows for a reduction in flange thickness, significantly contributing to weight reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the integrated structural installation of the non-obstructed pipe flange device;

[0026] Figure 2 This is an exploded schematic diagram of the integrated structure of the non-obstructive pipe flange device;

[0027] Figure 3 This is a schematic diagram of the hybrid structure installation of the non-obstructed pipe flange device;

[0028] Figure 4 This is an exploded schematic diagram of a hybrid structure of a non-blocking pipe butt flange device;

[0029] Figure 5This is a schematic diagram of the installation of a slip-on structure for a non-obstructed pipe butt flange device;

[0030] Figure 6 This is an exploded schematic diagram of the loop-type structure of the non-obstructive pipeline butt flange device;

[0031] Figure 7 This is a structural diagram of an integrated pipe butt flange device in the prior art;

[0032] Figure 8 The figure is a structural diagram of a slip-on pipe butt flange device in the prior art.

[0033] In the picture:

[0034] 1. Flange body part I; 1.1. Sleeve part I; 1.2. Flange part I; 1.3. Flange hole II; 1.4. Ring groove I; 1.5. Pipe welding boss I; 1.6. Loose flange I; 1.7. Butt welding ring I; 2. Flange body part II; 2.1. Sleeve part II; 2.2. Flange part II; 2.3. Flange hole II; 2.4. Ring groove II; 2.5. Pipe welding boss II; 2.6. Loose flange II; 2.7. Butt welding ring II; 3. Annular sealing gasket; 4. Annular sealing platform; 5. Unobstructed passage; 5.1. Connecting part; 5.2. Connecting part; 6. Annular fixed axis protrusion; 7. Annular fixed axis groove; 8. Pipe A; 9. Pipe B; 10. Frustum-shaped protrusion structure; 11. Frustum-shaped groove structure. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. It should not be understood that the present invention is limited to the following examples. Without departing from the concept of the present invention, the deformation and improvement of the present invention in this field should be included in the protection scope of the claims of the present invention.

[0036] Unless otherwise defined, technical or scientific terms used in this disclosure should have the ordinary meanings understood by persons of ordinary skill in the art to which this disclosure belongs. Words such as "or," "comprising," and the like used in this disclosure mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0037] Example 1

[0038] This embodiment discloses a non-blocking pipe butt flange device, as a preferred implementation scheme of this technical solution, such as Figure 1 and Figure 2 As shown, it includes flange body part Ⅰ1, flange body part Ⅱ2 and annular sealing gasket 3.

[0039] The flange body I1 is a one-piece structure, comprising a coaxial, integrally formed sleeve portion I1.1 and flange portion I1.2. An unobstructed passage 5 extends axially through the sleeve portion I1.1. The bottom of the sleeve portion I1.1 is provided with an annular groove I1.4 for receiving an annular sealing gasket 3. The top of the sleeve portion I1.1 is provided with a pipe welding boss I1.5 for welding to the connected pipe. Flange portion I1.2 is provided with a number of flange holes I1.3 spaced along the circumference of the sleeve portion I1.1 for mounting bolt assemblies.

[0040] The flange body II2 is a one-piece structure, comprising a coaxial, integrally formed sleeve portion II2.1 and flange portion II2.2. An unobstructed passage 5 extends axially through the sleeve portion II2.1. The top of the sleeve portion II2.1 is provided with an annular groove II2.4 for receiving an annular sealing gasket 3. The bottom of the sleeve portion II2.1 is provided with a pipe welding boss II2.5 for welding to the connected pipe. Flange portion II2.2 is provided with a plurality of flange holes II2.3 spaced along the circumference of the sleeve portion II2.1, corresponding one-to-one with the flange holes I1.3.

[0041] Several mounting bolt assemblies pass through flange holes I1.3 and II2.3 in a one-to-one correspondence, securing flange body I1 to flange body II2. Ring groove I1.4 mates with ring groove II2.4 to tightly enclose annular sealing gasket 3, completely embedding the latter within both grooves I1.4 and II2.4.

[0042] This technical solution has the following advantages:

[0043] 1) Good sealing performance: The bottom of the flange body part I1 is provided with an annular groove I1.4, and the top of the flange body part II2 is provided with an annular groove II2.4. The two can cooperate to tightly wrap the annular sealing gasket 3, so that the annular sealing gasket 3 is completely embedded in the annular groove, which effectively enhances the sealing performance and prevents the fluid in the pipeline from leaking. At the same time, the flange body part I1 and the flange body part II2 can be concentrically and completely docked with each other with basically no gap, so as to greatly reduce the flow resistance.

[0044] 2) Stable Structure: Flange body I1 and flange body II2 are self-contained, enhancing overall strength and stability, capable of withstanding significant pressure and tension during pipe connections. Several mounting bolt assemblies, correspondingly inserted through flange holes I1.3 and II2.3, securely connect flange body I1 and II2, ensuring a secure pipe connection that is less susceptible to loosening and leakage.

[0045] 3) Easy Installation: The top of casing section I1.1 is equipped with a pipe welding boss I1.5, and the bottom of casing section II2.1 is equipped with a pipe welding boss II2.5, facilitating welding to the connected pipes. The flange holes I1.3 on flange section I1.2 correspond to the flange holes II2.3 on flange section II2.2, making it easy to install the bolt assembly and making the installation process simple and quick.

[0046] Example 2

[0047] This embodiment discloses a non-obstructive pipe butt flange assembly. As a preferred implementation of this technical solution, based on Example 1, an annular sealing platform 4 is provided at the bottom of the sleeve portion I1.1 of the flange body I1 and / or at the top of the sleeve portion II2.1 of the flange body II2. When the annular sealing platform 4 is provided at the bottom of the sleeve portion I1.1 of the flange body I1, the annular groove I1.4 is correspondingly provided on the annular sealing platform 4. When the annular sealing platform 4 is provided at the top of the sleeve portion II2.1 of the flange body II2, the annular groove II2.4 is correspondingly provided on the annular sealing platform 4.

[0048] In this technical solution, the design of the annular sealing platform 4 increases the distance between flange portion I1.2 and flange portion II2.2, thereby increasing the space for the bolt assembly to pre-tighten flange portion I1.2 and flange portion II2.2. This structure helps improve connection reliability. Specifically, during installation, it is easier to apply an appropriate pre-tightening force, ensuring a tighter fit between flange body portion I1 and flange body portion II2. In addition, sufficient pre-tightening force effectively prevents loosening of the flange assembly during use due to factors such as vibration and temperature changes, ensuring the long-term stability of the pipeline connection.

[0049] Example 3

[0050] This embodiment discloses a non-obstructive pipe joint flange assembly. As a preferred implementation of this technical solution, based on Embodiments 1 or 2, the cross-sections of annular groove I 1.4 and annular groove II 2.4 both have a convex stepped structure. The cross-section of the annular cavity formed by the mating of annular groove I 1.4 and annular groove II 2.4 forms a cross-shaped, right-angled, multi-sided (dodecagonal) structure. Consequently, the cross-section of annular sealing gasket 3 also forms a cross-shaped, right-angled, multi-sided (dodecagonal) structure.

[0051] In the present technical solution, the "convex" stepped structure of the annular groove I1.4 and the annular groove II2.4 and the matched annular cavity present a "cross" right-angled polygonal (dodecagonal) structure, so that the annular sealing gasket 3 of the corresponding shape can be better embedded therein, thereby enhancing the positioning stability of the annular sealing gasket 3 and preventing it from shifting during the operation of the pipeline, thereby effectively improving the sealing performance; at the same time, the special shape design also increases the sealing contact area, further improving the overall sealing and connection reliability of the flange device, and during the installation and maintenance process, the annular sealing gasket 3 with this unique structure is also easier to install and disassemble, which brings convenience to the operation.

[0052] Example 4

[0053] This embodiment discloses a non-obstructive pipe joint flange assembly. As a preferred implementation of this technical solution, based on Examples 1, 2, or 3, the non-obstructive passage 5 includes a connecting portion 5.1 and a connecting portion 5.2. The diameter of the connecting portion 5.1 matches the outer diameter of the connected pipe, while the diameter of the connecting portion 5.2 matches the inner diameter of the connected pipe. This ensures that when flange body I1 and flange body II2 are connected to the pipe, the internal fluid flow space transitions smoothly.

[0054] In this technical solution, when the flange device is connected to the pipeline, the space for internal fluid flow can achieve a smooth transition, effectively avoiding flow obstruction, thereby ensuring smooth flow of fluid in the pipeline system, reducing energy loss and pressure loss, and improving the operating efficiency of the pipeline system. At the same time, it also reduces pipeline vibration and noise problems that may be caused by flow obstruction, and enhances the stability and reliability of the entire pipeline system.

[0055] Example 5

[0056] This embodiment discloses an unobstructed pipeline docking flange device, which is a preferred implementation scheme of the present technical solution, that is, based on Examples 1, 2, 3 or 4, an annular fixed axis protrusion 6 is provided at the bottom of the sleeve portion Ⅰ1.1 of the flange body part Ⅰ1 along the edge of the unobstructed channel 5; an annular fixed axis groove 7 that is adapted to the annular fixed axis protrusion 6 is provided at the top of the sleeve portion Ⅱ2.1 of the flange body part Ⅱ2 along the edge of the unobstructed channel 5.

[0057] In this technical solution, the annular fixed axis projection 6 on the bottom of flange body I1 mates with the annular fixed axis groove 7 on the top of flange body II2. During docking, the annular fixed axis projection 6 inserts axially into the annular fixed axis groove 7. This structure radially constrains flange body I1 and flange body II2, ensuring no significant gap between them and effectively preventing radial misalignment. This enhances the tightness and stability of the flange connection, ensures the reliability of the pipeline connection, reduces the risk of leakage caused by radial misalignment, and also helps improve the overall performance and safety of the pipeline system.

[0058] Example 6

[0059] This embodiment discloses a non-blocking pipe butt flange device, as a preferred implementation scheme of this technical solution, such as Figure 3 and Figure 4 As shown, it includes flange body part Ⅰ1, flange body part Ⅱ2 and annular sealing gasket 3.

[0060] The flange body I1 is a one-piece structure, comprising a coaxial, integrally formed sleeve portion I1.1 and flange portion I1.2. An unobstructed passage 5 extends axially through the sleeve portion I1.1. The bottom of the sleeve portion I1.1 is provided with an annular groove I1.4 for receiving an annular sealing gasket 3. The top of the sleeve portion I1.1 is provided with a pipe welding boss I1.5 for welding to the connected pipe. Flange portion I1.2 is provided with a number of flange holes I1.3 spaced along the circumference of the sleeve portion I1.1 for mounting bolt assemblies.

[0061] The flange body II2 is arranged in a slip-on fitting structure. From the perspective of the axial structure, the flange body II2 includes a slip-on flange II2.6 and a butt-weld ring II2.7, and the butt-weld ring II2.7 and the slip-on flange II2.6 are axially wedge-fitted. The axial wedge-fitting here means that a truncated cone-shaped protrusion structure 10 is provided on the butt-weld ring II2.7, and a truncated cone-shaped groove structure 11 is concentrically provided on the slip-on flange II2.6 to match the truncated cone-shaped protrusion structure 10. The cross-sections of the truncated cone-shaped protrusion structure 10 and the truncated cone-shaped groove structure 11 are wedge-shaped. Therefore, the fitting structure of the truncated cone-shaped protrusion structure 10 and the truncated cone-shaped groove structure 11 is an axial wedge-fitting butt-fitting structure. From the perspective of the radial structure, the flange body II2 includes a coaxially arranged sleeve portion II2.1 and a flange portion II2.2. An unobstructed passage 5 runs axially through sleeve portion II 2.1. An annular groove II 2.4 is provided at the top of sleeve portion II 2.1 for receiving an annular sealing gasket 3. A pipe welding boss II 2.5 is provided at the bottom of sleeve portion II 2.1 for welding to the connected pipe. An annular groove II 2.4 is also provided at the top of flange body II 2 for receiving annular sealing gasket 3. Flange portion II 2.2 is part of slip-on flange II 2.6, meaning flange hole II 2.3 is provided on slip-on flange II 2.6. Sleeve portion II 2.1 forms the mating structure between slip-on flange II 2.6 and butt-weld ring II 2.7, and therefore, annular groove II 2.4 is provided on butt-weld ring II 2.7.

[0062] Therefore, in actual use, flange body I1 is welded to the end of pipe A8, the slip-on flange II2.6 of flange body II2 is fitted onto pipe B9, and the butt welding ring II2.7 of flange body II2 is welded to the end of pipe B9. When connecting pipes A8 and B9, several mounting bolt assemblies are inserted through flange holes I1.3 and II2.3 in a corresponding manner, thereby firmly connecting flange body I1 and flange body II2. The annular groove I1.4 mates with the annular groove II2.4 to tightly enclose the annular sealing gasket 3.

[0063] This technical solution achieves a perfect combination of structural stability and installation flexibility. Specifically, the integrated structure of flange body I1 ensures its inherent high strength and stability, enabling it to reliably withstand pressure and tension during pipe connections, providing a solid foundation for the entire connection system. The slip-on design of flange body II2, on the other hand, allows for significant installation flexibility. The slip-on flange II2.6 can be easily fitted onto the pipe, while the axial wedge-shaped butt-weld ring II2.7 and slip-on flange II2.6 allow for more precise installation and accommodate certain installation errors. The combination of these two ensures both a secure connection and convenient installation.

[0064] Furthermore, this technical solution adapts to a variety of working conditions. Specifically, the integrated flange body I1 maintains stable performance under a variety of harsh working conditions, while the loose-fitting flange body II2 can be adjusted and adapted to varying pipe diameters, materials, and installation environments. Whether in new pipeline construction or renovations of existing piping systems, this combination can meet diverse working conditions, demonstrating strong versatility and applicability.

[0065] Example 7

[0066] This embodiment discloses a non-obstructive pipe butt flange assembly. As a preferred implementation of this technical solution, based on Example 6, an annular sealing platform 4 is provided at the bottom of the sleeve portion I1.1 of the flange body I1 and at the top of the sleeve portion II2.1 of the flange body II2. Annular grooves I1.4 and II2.4 are correspondingly provided on the annular sealing platforms 4. More specifically, for the flange body II2, the annular sealing platform 4 is part of the butt-weld ring II2.7.

[0067] Furthermore, the cross-sections of the annular groove I 1.4 and the cross-sections of the annular groove II 2.4 both present a "convex"-shaped stepped structure.

[0068] Furthermore, the unobstructed passage 5 includes a connecting portion 5.1 and a connecting portion 5.2. The diameter of the connecting portion 5.1 matches the outer diameter of the connected pipe, while the diameter of the connecting portion 5.2 matches the inner diameter of the connected pipe. More specifically, for the flange body II2, the connecting portion 5.2 is disposed on the butt-weld ring II2.7, while the connecting portion 5.1 transitions from the slip-on flange II2.6 to the butt-weld ring II2.7.

[0069] Example 8

[0070] This embodiment discloses an unobstructed pipe butt flange assembly. As a preferred implementation of this technical solution, based on Example 6 or 7, an annular axis-fixing projection 6 is provided at the bottom of the sleeve portion I1.1 of the flange body I1, along the edge of the unobstructed passage 5. An annular axis-fixing groove 7 is provided at the top of the sleeve portion II2.1 of the flange body II2, along the edge of the unobstructed passage 5, to mate with the annular axis-fixing projection 6. More specifically, for the flange body II2, the annular axis-fixing groove 7 is provided on the butt-weld ring II2.7.

[0071] Example 9

[0072] This embodiment discloses an unobstructed pipe butt flange assembly. As a preferred implementation of this technical solution, based on Example 6 or 7, an annular fixed axis groove 7 is provided at the bottom of the sleeve portion I1.1 of the flange body I1, along the edge of the unobstructed passage 5. An annular fixed axis protrusion 6 is provided at the top of the sleeve portion II2.1 of the flange body II2, along the edge of the unobstructed passage 5, to mate with the annular fixed axis groove 7. More specifically, for the flange body II2, the annular fixed axis protrusion 6 is provided on the butt welding ring II2.7.

[0073] Example 10

[0074] This embodiment discloses a non-blocking pipe butt flange device, as a preferred implementation scheme of this technical solution, such as Figure 5 and Figure 6 As shown, it includes flange body part Ⅰ1, flange body part Ⅱ2 and annular sealing gasket 3.

[0075] The flange body part I1 is arranged in a slip-on fitting structure. From an axial structural perspective, the flange body part I1 includes a slip-on flange I1.6 and a butt-weld ring I1.7, and the butt-weld ring I1.7 and the slip-on flange I1.6 are axially wedge-fitted. The axial wedge-fitting here means that a truncated cone-shaped protrusion structure 10 is provided on the butt-weld ring I1.7, and a truncated cone-shaped groove structure 11 is concentrically provided on the slip-on flange I1.6 to match the truncated cone-shaped protrusion structure 10. The cross-sections of the truncated cone-shaped protrusion structure 10 and the truncated cone-shaped groove structure 11 are wedge-shaped. Therefore, the fitting structure of the truncated cone-shaped protrusion structure 10 and the truncated cone-shaped groove structure 11 is an axial wedge-fitting butt-fitting structure. From a radial structural perspective, the flange body part I1 includes a coaxially arranged sleeve portion I1.1 and a flange portion I1.2. An unobstructed passage 5 extends axially through sleeve portion II 2.1. An annular groove II 2.4 is provided at the bottom of sleeve portion II 2.1 for receiving an annular sealing gasket 3. Flange portion II 2.2 is provided with a plurality of flange holes II 2.3 spaced along the circumference of sleeve portion II 2.1, corresponding one-to-one with flange holes I 1.3. Flange portion I 1.2 is part of slip-on flange I 1.6, meaning that flange holes I 1.3 are provided on slip-on flange I 1.6. Sleeve portion I 1.1 is part of the mating structure between slip-on flange I 1.6 and butt-weld ring I 1.7, and therefore, annular groove I 1.4 is provided on butt-weld ring I 1.7.

[0076] The flange body II2 is arranged in a slip-on fitting structure. From the perspective of the axial structure, the flange body II2 includes a slip-on flange II2.6 and a butt-weld ring II2.7, and the butt-weld ring II2.7 and the slip-on flange II2.6 are axially wedge-fitted. The axial wedge-fitting here means that a truncated cone-shaped protrusion structure 10 is provided on the butt-weld ring II2.7, and a truncated cone-shaped groove structure 11 is concentrically provided on the slip-on flange II2.6 to match the truncated cone-shaped protrusion structure 10. The cross-sections of the truncated cone-shaped protrusion structure 10 and the truncated cone-shaped groove structure 11 are wedge-shaped. Therefore, the fitting structure of the truncated cone-shaped protrusion structure 10 and the truncated cone-shaped groove structure 11 is an axial wedge-fitting butt-fitting structure. From the perspective of the radial structure, the flange body II2 includes a coaxially arranged sleeve portion II2.1 and a flange portion II2.2. An unobstructed passage 5 runs axially through sleeve portion II 2.1. An annular groove II 2.4 is provided at the top of sleeve portion II 2.1 for receiving an annular sealing gasket 3. A pipe welding boss II 2.5 is provided at the bottom of sleeve portion II 2.1 for welding to the connected pipe. An annular groove II 2.4 is also provided at the top of flange body II 2 for receiving annular sealing gasket 3. Flange portion II 2.2 is part of slip-on flange II 2.6, meaning flange hole II 2.3 is provided on slip-on flange II 2.6. Sleeve portion II 2.1 forms the mating structure between slip-on flange II 2.6 and butt-weld ring II 2.7, and therefore, annular groove II 2.4 is provided on butt-weld ring II 2.7.

[0077] Therefore, in actual use: The slip-on flange I1.6 of flange body I1 is fitted onto pipe A8, and the butt welding ring I1.7 of flange body I1 is welded to the end of pipe A8; the slip-on flange II2.6 of flange body II2 is fitted onto pipe B9, and the butt welding ring II2.7 of flange body II2 is welded to the end of pipe B9. When connecting pipes A8 and B9, several mounting bolt assemblies are inserted through flange holes I1.3 and II2.3 in a corresponding manner, securing flange body I1 and flange body II2. The annular groove I1.4 mates with the annular groove II2.4 to tightly enclose the annular sealing gasket 3.

[0078] Example 11

[0079] This embodiment discloses a non-obstructive pipe butt flange device. As a preferred implementation of this technical solution, based on Example 9, an annular sealing platform 4 is provided at the bottom of the sleeve portion I1.1 of the flange body I1 and the top of the sleeve portion II2.1 of the flange body II2, respectively. Annular grooves I1.4 and II2.4 are correspondingly provided on the annular sealing platforms 4. More specifically, for flange body I1, the annular sealing platform 4 is part of the butt-weld ring I1.7; for flange body II2, the annular sealing platform 4 is part of the butt-weld ring II2.7.

[0080] Furthermore, the cross-sections of the annular groove I 1.4 and the cross-sections of the annular groove II 2.4 both present a "convex"-shaped stepped structure.

[0081] Furthermore, the unobstructed passage 5 includes a connecting portion 5.1 and a connecting portion 5.2. The diameter of the connecting portion 5.1 matches the outer diameter of the connected pipe, while the diameter of the connecting portion 5.2 matches the inner diameter of the connected pipe. More specifically, for flange body I1, connecting portion 5.2 is located on butt-weld ring I1.7, and the connecting portion 5.1 transitions from the slip-on flange I1.6 to the butt-weld ring I1.7. For flange body II2, connecting portion 5.2 is located on butt-weld ring II2.7, and the connecting portion 5.1 transitions from the slip-on flange II2.6 to the butt-weld ring II2.7.

[0082] Furthermore, an annular axis-fixing protrusion 6 is provided at the bottom of the sleeve portion I1.1 of the flange body member I1 along the edge of the unobstructed channel 5. Specifically, the annular axis-fixing protrusion 6 is provided on the butt-welding ring I1.7; an annular axis-fixing groove 7 adapted to the annular axis-fixing protrusion 6 is provided at the top of the sleeve portion II2.1 of the flange body member II2 along the edge of the unobstructed channel 5. More specifically, the annular axis-fixing groove 7 is provided on the butt-welding ring II2.7.

[0083] Example 12

[0084] This embodiment discloses a non-obstructive pipe butt flange assembly. As a preferred implementation of this technical solution, based on any of Examples 1-12, flange body components I1 and II2 are made of any stainless steel material with a numerical code of S30408 ​​or higher, such as S30403, S31608, S31603, S11972, S22053, and S35887. As the numerical code increases, the tensile strength and plastic deformation resistance of these materials increase, and their corrosion resistance is substantially improved and enhanced, which is significantly beneficial for reducing flange thickness and weight. Considering material cost, S30408 ​​stainless steel is preferred.

Claims

1. A non-obstructive pipe joint flange device, comprising a flange body part I (1), a flange body part II (2) and an annular sealing gasket (3); characterized in that: The flange body part I (1) comprises a coaxially arranged sleeve part I (1.1) and a flange part I (1.2); an unobstructed passage (5) is axially penetrated on the sleeve part I (1.1), and an annular groove I (1.4) for embedding an annular sealing gasket (3) is provided at the bottom of the sleeve part I (1.1); a plurality of flange holes I (1.3) for mounting bolt assemblies are provided at intervals on the flange part I (1.2) along the circumference of the sleeve part I (1.1); The flange body II (2) comprises a coaxially arranged sleeve portion II (2.1) and a flange portion II (2.2); an unobstructed passage (5) is axially penetrated through the sleeve portion II (2.1), and a ring groove II (2.4) for embedding an annular sealing gasket (3) is provided on the top of the sleeve portion II (2.1); a plurality of flange holes II (2.3) corresponding to the flange holes I (1.3) are provided at intervals on the flange portion II (2.2) along the circumference of the sleeve portion II (2.1); A plurality of mounting bolt assemblies pass through the flange hole I (1.3) and the flange hole II (2.3) in a one-to-one correspondence, so that the flange body part I (1) and the flange body part II (2) are tightly connected; the annular groove I (1.4) and the annular groove II (2.4) cooperate to tightly wrap the annular sealing gasket (3).

2. A non-obstructive pipe butt flange device as claimed in claim 1, characterized in that: An annular sealing platform (4) is provided at the bottom of the sleeve portion I (1.1) of the flange body part I (1) and / or at the top of the sleeve portion II (2.1) of the flange body part II (2); when the annular sealing platform (4) is provided at the bottom of the sleeve portion I (1.1) of the flange body part I (1), the annular groove I (1.4) is correspondingly provided on the annular sealing platform (4); when the annular sealing platform (4) is provided at the top of the sleeve portion II (2.1) of the flange body part II (2), the annular groove II (2.4) is correspondingly provided on the annular sealing platform (4).

3. The non-obstructive pipe butt flange device according to claim 1, characterized in that: The cross sections of the annular groove I (1.4) and the cross sections of the annular groove II (2.4) both present a "convex"-shaped stepped structure.

4. The non-obstructive pipe butt flange device according to claim 1, characterized in that: The unobstructed passage (5) comprises a connecting portion (5.1) and a connecting portion (5.2); the diameter of the connecting portion (5.1) is consistent with the outer diameter of the connected pipe, and the diameter of the connecting portion (5.2) is consistent with the inner diameter of the connected pipe.

5. The non-obstructive pipe joint flange device according to claim 1, characterized in that: An annular fixed axis protrusion (6) is provided at the bottom of the sleeve portion I (1.1) of the flange body part I (1) along the edge of the unobstructed channel (5); an annular fixed axis groove (7) adapted to the annular fixed axis protrusion (6) is provided at the top of the sleeve portion II (2.1) of the flange body part II (2) along the edge of the unobstructed channel (5).

6. The non-obstructive pipe butt flange device according to claim 1, characterized in that: The flange body part I (1) is provided in an integrated structure, and a pipe welding boss I (1.5) is provided on the top of the sleeve part I (1.1).

7. The non-obstructive pipe butt flange device according to claim 1, characterized in that: The flange body II (2) is provided in an integrated structure, and a pipe welding boss II (2.5) is provided at the bottom of the sleeve portion II (2.1).

8. The non-obstructive pipe butt flange device according to claim 1, characterized in that: The flange body part I (1) is arranged in a slip-on fitting structure, comprising a slip-on flange I (1.6) and a butt-welding ring I (1.7), and the butt-welding ring I (1.7) and the slip-on flange I (1.6) are axially wedge-fitted and docked; the flange hole I (1.3) is arranged on the slip-on flange I (1.6), and the ring groove I (1.4) is arranged on the butt-welding ring I (1.7).

9. The non-obstructive pipe butt flange device according to claim 1, characterized in that: The flange body II (2) is arranged in a slip-on fitting structure, comprising a slip-on flange II (2.6) and a butt-welding ring II (2.7), and the butt-welding ring II (2.7) is butt-jointed with the slip-on flange II (2.6) in an axial wedge-shaped fit; the flange hole II (2.3) is arranged on the slip-on flange II (2.6), and the annular groove II (2.4) is arranged on the butt-welding ring II (2.7).

10. The non-obstructive pipe butt flange device according to claim 1, characterized in that: The flange body part I (1) and the flange body part II (2) are made of any stainless steel material with a numerical code of S30408 ​​or above.

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