Mechanical flange with vibration suppression structure and vibration reduction design method thereof

Abstract

The application relates to the technical field of flanges, and discloses a mechanical flange with a vibration suppression structure and a vibration reduction design method thereof. The device comprises two groups of flange pipes, the one ends of the two groups of flange pipes are connected with flange plates, the two groups of flange plates are fixed through a plurality of groups of bolts, the inner walls of the one ends of the two groups of flange pipes are sealingly provided with limiting rings, the one ends of the limiting rings are abutted with butt rings, the contact surfaces of the limiting rings and the butt rings are provided with first sealing rings, the edges of the butt rings are circumferentially provided with a plurality of groups of first positioning rods inserted into the limiting rings, the other ends of the butt rings are connected with conical rings, and the two groups of conical rings are jointly connected with corrugated pipes. The corrugated pipes and the first sealing rings are used as main sealing barriers to completely seal the medium in the internal circulation, a second sealing is formed through the second sealing rings at the edge of the end surface of the flange plate, and a plurality of annular linear contact sealings are formed through a plurality of groups of T-shaped rings and convex rings to serve as a third sealing.

Description

Technical Field

[0001] This invention relates to the field of flange technology, specifically to a mechanical flange with a vibration damping structure and its vibration reduction design method. Background Technology

[0002] A flange is a disc-shaped part widely used in piping systems and mechanical equipment connections. It is usually used in pairs to connect the ends of two pipes, valves or equipment together by bolting. In liquid transportation piping systems, flanges are key components for pipe connections, and their connection reliability and sealing performance directly affect the safe operation of the entire piping system.

[0003] In existing technologies, flange connections are typically achieved in the following way: two flanges to be connected are fixed to the ends of the pipe, a gasket or sealing ring is placed between the mating faces of the two flanges, and multiple sets of bolts are used to tighten them around the flanges so that the two flanges fit tightly together. Under the action of the bolt preload, the gasket undergoes elastic deformation, filling the microscopic gap between the flange end faces, thereby achieving a seal.

[0004] The inventors of this application discovered in their research that the core defect of the prior art is that: existing flange connections usually only have one layer of sealing gasket between the mating surfaces of the two flanges. When the sealing gasket fails due to aging, deformation or damage, the entire flange connection loses its sealing ability and lacks a redundant sealing structure. Summary of the Invention

[0005] This invention provides a mechanical flange with a vibration suppression structure and its vibration reduction design method, which solves the problem that existing flange connections rely on only a single sealing gasket and lack redundant sealing protection.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a mechanical flange with a vibration suppression structure and its vibration reduction design method, comprising two sets of flange pipes, each set of flange pipes having a flange plate connected to one end, the two sets of flange plates being fixed together by multiple sets of bolts, each set of flange pipes having a limiting ring sealed on the inner wall of one end of the flange pipes, one end of the limiting ring abutting against a mating ring, the contact surfaces of the limiting ring and the mating ring each having a first sealing ring, the edge of the mating ring being surrounded by multiple sets of first positioning rods inserted into the limiting ring, and the other end of the mating ring being connected to a conical ring, the two sets of conical rings being connected together by a bellows. The flange is equipped with a locking assembly for fixing the position of the mating ring, and the flange end face is provided with a sealing buffer assembly.

[0007] By adopting the above technical solution, a multi-level sealing protection system is constructed by using a bellows as the main sealing element in conjunction with the first sealing ring, the second sealing ring, and the T-shaped ring and convex ring inside the annular frame to form a multi-ring line contact seal. This system can maintain effective sealing even when the bellows is damaged. At the same time, the bellows can absorb fluid impact energy and pulsating pressure through elastic expansion and contraction deformation. Combined with the elastic deformation of the annular frame caused by vibration excitation, which compresses the damping fluid in the transverse groove, longitudinal groove, and liquid storage tank, the damping fluid reciprocates between the tanks, generating viscous resistance and converting the vibration mechanical energy into heat energy for consumption. This achieves comprehensive suppression of multi-directional vibration of the pipeline system from two dimensions: source buffering and end dissipation.

[0008] Preferably, the locking assembly includes multiple sets of first through holes, multiple sets of locking holes, and multiple sets of second through holes. The multiple sets of first through holes are circumferentially penetrating the interior of one end of the flange tube, the multiple sets of second through holes are circumferentially penetrating the interior of one end of the limiting ring, and the multiple sets of locking holes are circumferentially formed inside the docking ring. Locking rods are slidably connected inside the first through holes, locking holes, and second through holes. A limiting plug connected to the locking rod is slidably provided inside the second through hole. A spring is provided between the limiting plug and the second through hole.

[0009] Preferably, the locking assembly further includes a first wedge block and an adjusting ring. The first wedge block is located at one end of each locking rod extending to the outside of the flange tube. The adjusting ring is rotatably mounted on the outer surface of the flange tube. The adjusting ring is surrounded by multiple sets of second wedge blocks that are connected to the inclined surface of the first wedge block.

[0010] Preferably, the locking assembly further includes a locking block and two sets of L-shaped blocks. The two sets of L-shaped blocks are installed on the outer wall of the flange pipe. The locking block is located at one end of the adjusting ring and between the two sets of L-shaped blocks. Each of the locking block and the two sets of L-shaped blocks has a screw hole at one end.

[0011] Preferably, a first magnetic ring is provided at one end edge of the limiting ring, and a second magnetic ring is provided on the mating contact surface between the mating ring and the limiting ring, which is magnetically attracted to the first magnetic ring.

[0012] Preferably, the sealing buffer assembly includes a second sealing ring and an annular frame. The second sealing ring is located in the edge region of the flange pipe end face, and the annular frame is embedded in the middle region of the flange pipe end face. The annular frame has multiple sets of T-shaped rings inside, and one end of each T-shaped ring has a convex ring.

[0013] Preferably, the sealing buffer assembly further includes a transverse groove, a longitudinal groove, and a liquid storage tank. The transverse groove and the longitudinal groove are sequentially formed in a transverse and longitudinal direction inside the annular frame. The liquid storage tank is formed in the inner edge region of the annular frame. The liquid storage tank is connected to both the transverse groove and the longitudinal groove.

[0014] Preferably, the outer edges of the two sets of flanges are connected together to a plurality of U-shaped frames, and the bolts pass through the interior of the U-shaped frames.

[0015] Preferably, the flange end face edge is provided with multiple sets of second positioning rods and multiple sets of positioning grooves in an alternating manner.

[0016] Preferably, for a mechanical flange with a vibration damping structure as described in any one of claims 1-9, the method comprises the following steps: S1. Assembly: By argon arc welding the two ends of the bellows to the two sets of conical rings respectively, the two sets of mating rings are then inserted into the flange tubes from the open ends of the two sets of flange tubes. The first positioning rod is inserted into the corresponding positioning hole on the end face of the limiting ring. The magnetic attraction between the first magnetic ring and the second magnetic ring is used to attract and position the mating ring on the end face of the limiting ring, ensuring that the mating ring will not detach from the end face of the limiting ring due to gravity or slight vibration before being locked by the locking rod. At the same time, the two sets of first sealing rings contact to form a sealing barrier. S2. Locking component locking operation: By rotating the adjusting ring, the adjusting ring drives the multiple sets of second wedge blocks on the inner wall to rotate. The inclined surface of the second wedge block pushes the first wedge block to move axially, so that the first wedge block drives the locking rod to pass through the first through hole, the lock hole and the second through hole in sequence, so that the locking rod is inserted into the lock hole until the locking block is aligned with the screw hole axis of a set of L-shaped blocks. At this time, the locking block and the L-shaped blocks are fixedly connected by screws to complete the circumferential locking of the adjusting ring. S3. Flange installation operation: Bring the two sets of flange end faces together axially, so that the second sealing ring in the edge area of ​​the flange end face is pressed against the corresponding second sealing ring in the opposite flange end face to form a sealing barrier. Then, press the annular frame in the middle area of ​​the flange end face against the corresponding annular frame in the opposite flange end face. Insert the second positioning rod of the flange end face into the positioning groove to ensure that the relative angle of the two sets of flanges in the circumferential direction is fixed, and to prevent the sealing buffer assembly from being misaligned during the pressing process. S4. Bolt tightening operation: Distribute multiple sets of U-shaped frames evenly along the circumference of the two sets of flanges, so that the two ends of the U-shaped frames are respectively inserted into the outer walls of the two sets of flanges. Then, pass the bolts through the bolt mounting holes of the flanges and the bolt holes of the U-shaped frames in sequence, and install washers and nuts on the protruding ends of the bolts.

[0017] This invention provides a mechanical flange with a vibration damping structure and its vibration reduction design method. It has the following beneficial effects: 1. This invention completely seals the medium within its flow by using a bellows in conjunction with a first sealing ring as the main sealing barrier. A second sealing ring is formed at the edge of the flange end face to form a second seal. Multiple sets of T-rings and convex rings form multiple annular line contact seals as a third seal. Even if the bellows breaks due to fatigue or corrosion, the subsequent multiple seals can still maintain an effective seal, overcoming the shortcomings of existing flange connections that rely solely on a single sealing gasket and lose their sealing ability once it fails.

[0018] 2. This invention maintains a non-fixed fit between the outer wall of the bellows and the inner wall of the flange. When liquid flows through the bellows, the bellows, with its flexible corrugated structure, freely expands and contracts with the impact of the liquid and pressure pulsation, reducing the transmission of vibration to the flange area. At the same time, the annular frame undergoes elastic deformation under vibration excitation, squeezing the damping fluid in the transverse groove, longitudinal groove and liquid storage tank. This causes the damping fluid to flow back and forth between the grooves, generating viscous resistance and converting the mechanical energy of vibration into heat energy. The two work together to suppress the vibration of the pipeline system from two dimensions: source buffering and end dissipation, thus achieving vibration isolation protection for the flange area.

[0019] 3. This invention uses a corrugated pipe with a mating ring and a limiting ring at both ends. Rotating the adjusting ring drives the locking rod to lock the mating ring and the limiting ring. During disassembly, the corrugated pipe can be pulled out and replaced simply by reversing the operation. In addition, by rotating the adjusting ring, multiple sets of locking rods can be driven to simultaneously insert into or move away from the lock hole, realizing quick unlocking and locking of the mating ring and the limiting ring, reducing the difficulty of maintaining and replacing the corrugated pipe. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the L-shaped stop block of the present invention; Figure 3 This is a schematic cross-sectional view of the entire invention; Figure 4 For the present invention Figure 3 A magnified view of part A; Figure 5 This is a schematic diagram of the adjusting ring of the present invention; Figure 6 This is a cross-sectional view of the bellows being removed according to the present invention; Figure 7 This is a schematic diagram of the bellows of the present invention; Figure 8 For the present invention Figure 3 A magnified view of part B.

[0021] The components are as follows: 1. Flange pipe; 2. Flange plate; 3. Bolt; 4. Limiting ring; 5. Butt ring; 501. Conical ring; 502. Bellows; 503. First sealing ring; 504. First positioning rod; 601. First through hole; 602. Locking hole; 603. Locking rod; 604. Limiting plug; 605. Spring; 606. Second through hole; 701. First wedge block; 702. Adjusting ring; 703. Second wedge block; 704. Locking block; 705. L-shaped stop block; 706. Screw hole; 801. First magnetic ring; 802. Second magnetic ring; 901. Second sealing ring; 902. Annular frame; 903. T-shaped ring; 904. Convex ring; 905. Transverse groove; 906. Longitudinal groove; 907. Liquid storage tank; 10. U-shaped frame; 11. Second positioning rod. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 -Appendix Figure 8 This invention provides a mechanical flange with a vibration suppression structure and its vibration reduction design method, including two sets of flange pipes 1, each set of flange pipes 1 is connected to a flange 2 at one end, the two sets of flange 2 are fixed together by multiple sets of bolts 3, each set of flange pipes 1 has a limiting ring 4 sealed on the inner wall at one end, one end of the limiting ring 4 abuts against a docking ring 5, the contact surfaces of the limiting ring 4 and the docking ring 5 are provided with a first sealing ring 503, the edge of the docking ring 5 is surrounded by multiple sets of first positioning rods 504 inserted into the limiting ring 4, and the other end of the docking ring 5 is connected to a conical ring 501, the two sets of conical rings 501 are connected together by a bellows 502; Specifically, flange 1 serves as the flow channel for the pipeline medium and provides an installation base for internal components. Flange 2 is used to mate with another flange 2 and is fastened with bolts 3 to connect the two sets of pipelines. Bolts 3 are used to tighten and press the two sets of flanges 2 together to provide the preload required for sealing. Limiting ring 4 serves as the installation reference and positioning base for the internal sealing structure. Butt ring 5 serves as a transition component connecting limiting ring 4 and bellows 502. Both limiting ring 4 and butt ring 5 have a first sealing ring 503 on their contact surfaces to form a first sealing barrier when they are in contact. The edge of butt ring 5 is surrounded by multiple sets of first positioning rods 504 inserted into the limiting ring 4 for... The circumferential positioning of the connecting ring 5 prevents deflection, and the other end of the connecting ring 5 is connected to a conical ring 501 to guide the smooth transition flow of the medium and change the diameter of the connecting ring 5 so that the outer wall of the bellows 502 is close to the flange pipe 1. The bellows 502 acts as the main sealing barrier. When the pipeline system undergoes thermal expansion and contraction, the bellows 502 absorbs the axial displacement of the pipeline through its own elastic expansion and contraction deformation, reducing the thermal stress of the pipeline. At the same time, when the pipeline is subjected to liquid impact or mechanical vibration, the bellows 502 absorbs the vibration energy through elastic deformation, playing a preliminary vibration reduction and buffering role. Meanwhile, the complete pipe wall structure of the bellows 502 constitutes the main sealing barrier between the medium and the external environment.

[0024] The flange 1 is equipped with a locking assembly for fixing the position of the mating ring 5, and the flange 2 end face is provided with a sealing buffer assembly.

[0025] Furthermore, the locking assembly includes multiple sets of first through holes 601, multiple sets of locking holes 602, and multiple sets of second through holes 606. The multiple sets of first through holes 601 are circumferentially through the inside of one end of the flange pipe 1, the multiple sets of second through holes 606 are circumferentially through the inside of one end of the limiting ring 4, and the multiple sets of locking holes 602 are circumferentially formed inside the docking ring 5. Locking rods 603 are slidably connected inside the first through holes 601, locking holes 602, and second through holes 606. A limiting plug 604 connected to the locking rod 603 is slidably provided inside the second through hole 606, and a spring 605 is provided between the limiting plug 604 and the second through hole 606.

[0026] Specifically, multiple sets of first through holes 601 provide an insertion channel for the locking rod 603 and guide the locking rod 603 to slide axially. Multiple sets of second through holes 606 are arranged around and pass through one end of the limiting ring 4 and are aligned with the first through holes 601. They are used to receive the locking rod 603 and provide guiding support. Multiple sets of locking holes 602 are arranged around and opened inside the docking ring 5 and are positioned corresponding to the first through holes 601 and the second through holes 606. They are used to cooperate with the locking rod 603 to lock and fix the docking ring 5. The locking rod 603, as the core actuator of the locking assembly, locks the docking ring 5 and the limiting ring 4 after being inserted into the locking hole 602, preventing the docking ring 5 from loosening and shifting under vibration. The limiting plug 604 is used to limit the axial travel of the locking rod 603 and prevent the locking rod 603 from coming out of the flange tube 1. The spring 605 is used to provide continuous elastic tension for resetting the locking rod 603. In addition, a sealing ring is also embedded at one end of the second through hole 606.

[0027] Furthermore, the locking assembly also includes a first wedge block 701 and an adjusting ring 702. The first wedge block 701 is located at one end of each set of locking rods 603 extending to the outside of the flange tube 1. The adjusting ring 702 is rotatably mounted on the outer surface of the flange tube 1. Multiple sets of second wedge blocks 703 connected to the inclined surface of the first wedge block 701 are arranged around the inside of the adjusting ring 702.

[0028] Specifically, the first wedge block 701 cooperates with the second wedge block 703 to convert the circumferential rotation of the adjusting ring 702 into the axial linear motion of the locking rod 603, driving the locking rod 603 to insert into the lock hole 602. The adjusting ring 702 serves as the operating component of the locking assembly. By rotating the adjusting ring 702, the operator can simultaneously drive multiple sets of locking rods 603 to achieve rapid locking or releasing of the docking ring 5. The number of second wedge blocks 703 corresponds to the number of first wedge blocks 701, and their inclined surfaces slide in cooperation with the inclined surfaces of the first wedge blocks 701. When the adjusting ring 702 rotates, it converts the rotational force into axial thrust, ensuring that the multiple sets of locking rods 603 move synchronously and have consistent strokes, thus achieving a uniform distribution of locking force in the circumferential direction of the docking ring 5.

[0029] Furthermore, the locking assembly also includes a locking block 704 and two sets of L-shaped blocks 705. The two sets of L-shaped blocks 705 are installed on the outer wall of the flange pipe 1. The locking block 704 is located at one end of the adjusting ring 702 and between the two sets of L-shaped blocks 705. Screw holes 706 are provided at one end of the locking block 704 and the two sets of L-shaped blocks 705.

[0030] Specifically, two sets of L-shaped stops 705 are used to restrict the position of the locking block 704. When the adjusting ring 702 rotates to the locking position where the locking rod 603 is fully inserted into the locking hole 602, the screw holes 706 between the locking block 704 and the set of L-shaped stops 705 are axially aligned. The locking block 704 is connected to the set of L-shaped stops 705 by inserting fastening screws into the screw holes 706, thereby achieving circumferential locking of the adjusting ring 702 and preventing the adjusting ring 702 from rotating in the opposite direction due to pipeline vibration, which would cause the locking rod 603 to come out of the locking hole 602.

[0031] Furthermore, a first magnetic ring 801 is provided on one edge of the limiting ring 4, and a second magnetic ring 802 is provided on the mating contact surface between the mating ring 5 and the limiting ring 4, which is magnetically attracted to the first magnetic ring 801.

[0032] Specifically, the magnetic attraction between the first magnetic ring 801 and the second magnetic ring 802 is used to ensure that the docking ring 5 can be stably attracted after being inserted into the end face of the limiting ring 4 and will not fall off due to gravity or slight vibration, thus playing an auxiliary positioning role. When the docking ring 5 approaches the limiting ring 4, the magnetic attraction guides the docking ring 5 to automatically align to the correct installation position, and cooperates with the insertion of the first positioning rod 504 into the positioning hole to achieve rapid initial positioning of the docking ring 5 and the limiting ring 4. When it is necessary to disassemble and replace the bellows 502, the docking ring 5 can be separated from the end face of the limiting ring 4 by applying a pulling force greater than the magnetic attraction force with an external tool, thus achieving rapid disassembly.

[0033] Please see the appendix Figure 3 Appendix Figure 8 The sealing buffer assembly includes a second sealing ring 901 and an annular frame 902. The second sealing ring 901 is located in the edge area of ​​the end face of the flange pipe 1, and the annular frame 902 is embedded in the middle area of ​​the end face of the flange pipe 1. The annular frame 902 has multiple sets of T-shaped rings 903 inside, and one end of the T-shaped ring 903 has a convex ring 904. The sealing buffer assembly also includes a transverse groove 905, a longitudinal groove 906, and a liquid storage tank 907. The transverse groove 905 and the longitudinal groove 906 are opened transversely and longitudinally in the annular frame 902, respectively. The liquid storage tank 907 is opened in the edge area inside the annular frame 902, and the liquid storage tank 907 is connected to the transverse groove 905 and the longitudinal groove 906.

[0034] Specifically, when the two sets of flanges 2 are fastened together by bolts 3, the second sealing ring 901 is compressed and undergoes elastic deformation, filling the microscopic gaps in the edge area of ​​the flange 2 end face and preventing the medium from leaking from the edge area of ​​the flange 2. At the same time, the end face of the annular frame 902 contacts and is compressed with the end face of the opposite flange 2, and the multiple sets of T-shaped rings 903 inside the annular frame 902 undergo elastic deformation. The end face of the convex ring 904 is tightly fitted with the end face of the opposite flange 2 to form multiple annular contact seals. The end face of the convex ring 904 is slightly higher than the flange. The end face of the flange 2 ensures that the convex ring 904 is the first to contact and bear force when the flange 2 is in contact, forming a line contact seal, effectively blocking the radial leakage path of the medium and achieving a graded and gradual sealing. When the flange 2 is subjected to vibration excitation, the annular frame 902 undergoes elastic deformation, squeezing the damping fluid in the transverse groove 905, longitudinal groove 906 and liquid storage tank 907, causing the damping fluid to flow back and forth between the tanks. When the damping fluid flows through the tank channel, it generates viscous resistance, converting the vibration mechanical energy into heat energy and dissipating the vibration energy.

[0035] Furthermore, the outer edges of the two sets of flanges 2 are connected together by multiple sets of U-shaped frames 10, and the bolts 3 penetrate the interior of the U-shaped frames 10; the U-shaped structure of the U-shaped frame 10 forms a bridging constraint between the two sets of flanges 2, which can share the axial tensile force and radial shear force borne by the bolts 3, and prevent the flanges 2 from undergoing relative displacement and deflection under pipeline vibration environment.

[0036] Furthermore, multiple sets of second positioning rods 11 and multiple sets of positioning grooves are staggered around the edge of the flange 2 end face; among them, in the pipeline operation vibration environment, the insertion and cooperation of the second positioning rods 11 and the positioning grooves can withstand the circumferential shear load between the flanges 2, reduce the relative deflection of the flanges 2 caused by vibration, and at the same time, the cooperation of the two also facilitates the early assembly and positioning operation of the two sets of flanges 2.

[0037] Furthermore, for the mechanical flange with vibration damping structure according to any one of claims 1-9, the method includes the following steps: S1. Assembly: By argon arc welding, the two ends of the bellows 502 are respectively sealed to the two sets of conical rings 501. Then, the two sets of mating rings 5 ​​are respectively inserted into the flange tube 1 from the open ends of the two sets of flange tubes 1. The first positioning rod 504 is inserted into the corresponding positioning hole on the end face of the limiting ring 4. The magnetic attraction between the first magnetic ring 801 and the second magnetic ring 802 is used to attract and position the mating ring 5 on the end face of the limiting ring 4, ensuring that the mating ring 5 will not be arbitrarily separated from the end face of the limiting ring 4 due to gravity or slight vibration before being locked by the locking rod 603. At the same time, the two sets of first sealing rings 503 are in contact to form a sealing barrier. S2. Locking component locking operation: By rotating the adjusting ring 702, the adjusting ring 702 drives the multiple sets of second wedge blocks 703 on the inner wall to rotate. The inclined surface of the second wedge block 703 pushes the first wedge block 701 to move axially, so that the first wedge block 701 drives the locking rod 603 to pass through the first through hole 601, the locking hole 602 and the second through hole 606 in sequence, so that the locking rod 603 is inserted into the locking hole 602 until the locking block 704 is axially aligned with the screw hole 706 of a set of L-shaped stops 705. At this time, the locking block 704 and the L-shaped stops 705 are fixedly connected by screws to complete the circumferential locking of the adjusting ring 702. S3. Flange installation operation: Bring the two sets of flange 1 end faces together axially, so that the second sealing ring 901 in the edge area of ​​the flange 2 end face is pressed against the corresponding second sealing ring 901 in the opposite flange 2 end face to form a sealing barrier. Then, press the annular frame 902 in the middle area of ​​the flange 2 end face against the corresponding annular frame 902 in the opposite flange 2 end face. Insert the second positioning rod 11 in the positioning groove through the flange 2 end face to ensure that the relative angle of the two sets of flange 2 in the circumferential direction is fixed and to prevent the sealing buffer assembly from being misaligned during the pressing process. S4. Bolt tightening operation: Distribute multiple sets of U-shaped frames 10 evenly along the circumference of the two sets of flanges 2, so that the two ends of the U-shaped frames 10 are respectively inserted into the outer wall of the two sets of flanges 2. Then, pass the bolts 3 through the bolt mounting holes of the flanges 2 and the bolt holes of the U-shaped frames 10 in sequence, and install washers and nuts at the protruding ends of the bolts 3.

[0038] Workflow: First, weld both ends of the bellows 502 to the tapered ring 501. Insert the mating ring 5 into the flange tube 1, and insert the first positioning rod 504 into the positioning hole of the limiting ring 4. Use the magnetic attraction of the first magnetic ring 801 and the second magnetic ring 802 to attract and position the mating ring 5, so that the two sets of first sealing rings 503 fit together to form a sealing barrier. Then, rotate the adjusting ring 702, and push the first wedge block 701 through the second wedge block 703 to drive the locking rod 603 through the first through hole 601, the locking hole 602 and the second through hole 606 to lock the mating ring 5 and the limiting ring 4. The adjusting ring 702 is then circumferentially locked by fixing the locking block 704 and the L-shaped stop block 705 with screws. Then, bring the end faces of the two sets of flange tubes 1 together, so that the second sealing ring 901 fits and is pressed together to form a sealing barrier. The annular frame 902 fits together with the T-shaped ring 903 and the convex ring 904 to form a sealing barrier again. The second positioning rod 11 is inserted into the positioning groove to achieve circumferential positioning; then multiple sets of U-shaped frames 10 are evenly distributed along the circumference of the flange 2 and inserted into the outer wall, and bolts 3 are used to pass through the flange 2 and U-shaped frames 10 and tighten them; when the pipeline is working normally, the medium flows through the inner cavity of the bellows 502. When thermal expansion and contraction or vibration occurs, the bellows 502 absorbs axial displacement and vibration energy through elastic expansion and contraction deformation. At the same time, the annular frame 902 generates elastic deformation to squeeze the damping fluid in the transverse groove 905, longitudinal groove 906 and liquid storage tank 907, so that the damping fluid flows back and forth between the tanks to generate viscous resistance, converting the vibration mechanical energy into heat energy consumption; when the bellows 502 is damaged and the medium pressure is suddenly released, the U-shaped frame 10 provides axial constraint force to limit the separation distance between the two sets of flanges 2, and works with the second sealing ring 901 and the annular frame 902 to maintain the seal, realizing multiple sealing protection and multi-dimensional vibration suppression.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical flange with a vibration damping structure, comprising two sets of flange tubes (1), characterized in that, Two sets of flange pipes (1) are connected to flanges (2) at one end. The two sets of flanges (2) are fixed together by multiple sets of bolts (3). The inner wall of one end of the two sets of flange pipes (1) is sealed with a limiting ring (4). One end of the limiting ring (4) abuts against a docking ring (5). The contact surfaces of the limiting ring (4) and the docking ring (5) are provided with a first sealing ring (503). The edge of the docking ring (5) is surrounded by multiple sets of first positioning rods (504) inserted into the limiting ring (4). The other end of the docking ring (5) is connected to a conical ring (501). The two sets of conical rings (501) are connected together by a bellows (502). The flange (1) is equipped with a locking assembly for fixing the position of the docking ring (5), and the flange (2) end face is provided with a sealing buffer assembly.

2. A mechanical flange with a vibration suppression structure according to claim 1, characterized in that, The locking assembly includes multiple sets of first through holes (601), multiple sets of locking holes (602), and multiple sets of second through holes (606). The multiple sets of first through holes (601) are circumferentially through the inside of one end of the flange pipe (1). The multiple sets of second through holes (606) are circumferentially through the inside of one end of the limiting ring (4). The multiple sets of locking holes (602) are circumferentially opened inside the docking ring (5). Locking rods (603) are slidably connected inside the first through holes (601), locking holes (602), and second through holes (606). A limiting plug (604) connected to the locking rod (603) is slidably provided inside the second through hole (606). A spring (605) is provided between the limiting plug (604) and the second through hole (606).

3. A mechanical flange with a vibration suppression structure according to claim 2, characterized in that, The locking assembly further includes a first wedge block (701) and an adjusting ring (702). The first wedge block (701) is located at one end of each locking rod (603) extending to the outside of the flange tube (1). The adjusting ring (702) is rotatably mounted on the outer surface of the flange tube (1). The adjusting ring (702) is surrounded by multiple sets of second wedge blocks (703) connected to the inclined surface of the first wedge block (701).

4. A mechanical flange with a vibration suppression structure according to claim 3, characterized in that, The locking assembly also includes a locking block (704) and two sets of L-shaped blocks (705). The two sets of L-shaped blocks (705) are installed on the outer wall of the flange pipe (1). The locking block (704) is located at one end of the adjusting ring (702) and between the two sets of L-shaped blocks (705). A screw hole (706) is provided at one end of both the locking block (704) and the two sets of L-shaped blocks (705).

5. A mechanical flange with a vibration suppression structure according to claim 1, characterized in that, The limiting ring (4) has a first magnetic ring (801) on one end edge, and the docking ring (5) and the limiting ring (4) have a second magnetic ring (802) that is magnetically attracted to the first magnetic ring (801) on their docking contact surface.

6. A mechanical flange with a vibration suppression structure according to claim 1, characterized in that, The sealing buffer assembly includes a second sealing ring (901) and an annular frame (902). The second sealing ring (901) is located in the edge area of ​​the end face of the flange pipe (1). The annular frame (902) is embedded in the middle area of ​​the end face of the flange pipe (1). Multiple sets of T-shaped rings (903) are provided inside the annular frame (902). One end of the T-shaped ring (903) is provided with a convex ring (904).

7. A mechanical flange with a vibration damping structure according to claim 6, characterized in that, The sealing buffer assembly further includes a transverse groove (905), a longitudinal groove (906), and a liquid storage tank (907). The transverse groove (905) and the longitudinal groove (906) are opened transversely and longitudinally inside the annular frame (902), respectively. The liquid storage tank (907) is opened in the inner edge area of ​​the annular frame (902). The liquid storage tank (907) is connected to both the transverse groove (905) and the longitudinal groove (906).

8. A mechanical flange with a vibration suppression structure according to claim 1, characterized in that, The outer edges of the two sets of flanges (2) are connected to multiple sets of U-shaped frames (10), and the bolts (3) penetrate the interior of the U-shaped frames (10).

9. A mechanical flange with a vibration suppression structure according to claim 1, characterized in that, The flange (2) has multiple sets of second positioning rods (11) and multiple sets of positioning grooves interlaced around its end face edge.

10. A mechanical flange with a vibration damping structure and its vibration reduction design, characterized in that, For a mechanical flange with a vibration damping structure as described in any one of claims 1-9, the method comprises the following steps: S1. Assembly: By argon arc welding the two ends of the bellows (502) to the two sets of conical rings (501) respectively, the two sets of mating rings (5) are then installed into the flange pipe (1) from the open ends of the two sets of flange pipes (1), so that the first positioning rod (504) is inserted into the corresponding positioning hole on the end face of the limiting ring (4). Using the magnetic attraction between the first magnetic ring (801) and the second magnetic ring (802), the mating ring (5) is attracted and positioned on the end face of the limiting ring (4), ensuring that the mating ring (5) will not be arbitrarily separated from the end face of the limiting ring (4) due to gravity or slight vibration before being locked by the locking rod (603). At the same time, the two sets of first sealing rings (503) are in contact to form a sealing barrier. S2, Locking component locking operation: By rotating the adjusting ring (702), the adjusting ring (702) drives the multiple sets of second wedge blocks (703) on the inner wall to rotate. The inclined surface of the second wedge block (703) pushes the first wedge block (701) to move axially, so that the first wedge block (701) drives the locking rod (603) to pass through the first through hole (601), the lock hole (602) and the second through hole (606) in sequence, so that the locking rod (603) is inserted into the lock hole (602) until the locking block (704) is aligned with the screw hole (706) of a set of L-shaped blocks (705). At this time, the locking block (704) and the L-shaped blocks (705) are fixedly connected by screws to complete the circumferential locking of the adjusting ring (702). S3. Flange installation operation: Bring the two sets of flanges (1) together axially, so that the second sealing ring (901) on the edge of the flange (2) is pressed against the second sealing ring (901) at the corresponding position on the flange (2) to form a sealing barrier. Then, press the annular frame (902) in the middle area of ​​the flange (2) against the annular frame (902) at the corresponding position on the flange (2) and insert the second positioning rod (11) on the flange (2) into the positioning groove to ensure that the relative angle of the two sets of flanges (2) is fixed in the circumferential direction, and to prevent the sealing buffer assembly from being misaligned during the pressing process. S4. Bolt tightening operation: Distribute multiple sets of U-shaped frames (10) evenly along the circumference of the two sets of flanges (2), so that the two ends of the U-shaped frames (10) are respectively inserted into the outer walls of the two sets of flanges (2). Then, pass the bolts (3) through the bolt mounting holes of the flanges (2) and the bolt through holes of the U-shaped frames (10) in sequence, and install washers and nuts at the protruding ends of the bolts (3).

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