High bearing stainless steel butt welding flange
By integrating the gas injection and sealing components into a dynamic sealing design, and combining the structural reinforcement of the fixing components and reinforcing rings, the problem of sealing failure and structural fatigue of existing weld neck flanges under high pressure and high temperature environments has been solved, achieving high load-bearing reliability and stability.
Patent Information
- Application Number
- CN202522702682.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-20
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-20
AI Technical Summary
Existing weld neck flanges have shortcomings in sealing and load-bearing capacity. In particular, under high pressure and high temperature environments, they are prone to sealing failure and structural fatigue due to vibration, thermal expansion and contraction or media corrosion, which affects the stability of pipelines.
The design integrates the gas injection and sealing components, achieving dynamic sealing through the cooperation of the piston disc and rubber sealing tube. Combined with the structural reinforcement of the fixing component and the reinforcing ring, the load is distributed by the triangular support block, enhancing the deformation resistance of the flange ring.
It improves sealing performance and load-bearing capacity, ensuring long-term reliability in high-pressure or corrosive environments, reducing maintenance needs, and extending service life.
Smart Images
Figure CN224932356U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding flanges, and in particular to a high load-bearing stainless steel welding flange. Background Technology
[0002] Welding flanges are a common pipe connection element, widely used in industries such as petroleum, chemical, and power to securely connect pipes, valves, or equipment. They are typically fixed to the pipe end by welding, forming a detachable connection point for easy maintenance and installation. The design of welding flanges must consider factors such as internal medium pressure, external loads, and temperature changes to ensure the sealing and structural integrity of the connection. Stainless steel welding flanges, due to their corrosion resistance and high strength, are particularly suitable for corrosive environments or demanding operating conditions, extending their service life and improving system reliability. With the development of industrial technology, the application of welding flanges under harsh conditions such as high pressure and high temperature is increasing, placing higher demands on their performance. Existing welding flanges have some shortcomings in terms of sealing and load-bearing capacity. For example, traditional flanges rely on bolt fastening and gasket sealing, but in long-term use, due to vibration, thermal expansion and contraction or media corrosion, the seal is prone to failure, leading to leakage risks. In addition, some flanges have simple structures and lack effective reinforcement designs, which may deform or suffer fatigue damage when subjected to high loads, affecting the overall stability of the pipeline. Therefore, a high load-bearing stainless steel welding flange is proposed. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high load-bearing stainless steel welding flange that can effectively improve sealing performance and load-bearing capacity through automatic gas injection sealing and structural reinforcement design, thus effectively solving the problems in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a high load-bearing stainless steel welding flange, comprising a flange ring and a fixing assembly; Flange rings: There are two. The left flange ring has an air injection assembly and a sealing assembly installed inside, and the right flange ring has a compression assembly installed at its left end. The fixing component includes a fixing ring, connecting bolts, fixing nuts, and triangular support blocks. The fixing ring is fixed on the circumferential surface of the flange ring. The fixing ring has evenly distributed connecting holes on its end face. Connecting bolts are installed inside the two corresponding connecting holes on the left and right sides. The fixing nuts are threaded onto the surface of the connecting bolts and fit against the right end of the fixing ring on the right side. Triangular support blocks are evenly distributed on the end face of the fixing ring. All the triangular support blocks are fixed on the circumferential surfaces of the two flange rings respectively. The two flange rings are connected by setting up the fixing component.
[0005] Furthermore, the gas injection assembly includes a piston disc, a connecting disc, and a support spring. The right end of the left flange ring has evenly distributed grooves, and the piston disc is slidably connected inside the grooves. The connecting disc is fixed to the right end of the piston disc, and the support spring is fixed to the left end of the piston disc. The support spring is fixed inside the grooves. By setting the gas injection assembly, after the two flange rings are connected, all the piston discs will be squeezed and moved to inject compressed gas into the interior of the rubber sealing tube, causing it to bulge. After the rubber sealing tube bulges, the gap between the two flange rings can be sealed.
[0006] Furthermore, the sealing assembly includes an air guide tube and a rubber sealing tube. The left flange ring has evenly distributed air guide holes inside its ring wall. These air guide holes communicate with a groove on the right end of the left flange ring. An air guide tube is fixed inside each air guide hole. Annular grooves are formed on the end faces of both flange rings. Rubber sealing tubes are installed inside the two annular grooves. The rubber sealing tubes are fixed inside the annular groove on the left side. The right ends of all the air guide tubes are fixed to the surface of the rubber sealing tube. All the air guide tubes communicate with the inner cavity of the rubber sealing tube. Compressed gas is injected into the interior of the rubber sealing tube through these air guide tubes.
[0007] Furthermore, the extrusion assembly includes extrusion columns and locking blocks. The left end of the right flange ring is fixed with evenly distributed extrusion columns, and all the extrusion columns are slidably connected to the inside of evenly distributed sliding grooves opened at the right end of the left flange ring. The left end of the extrusion column is fixed with a locking block, and the right end of the connecting plate is provided with a square groove. The locking block is engaged inside the square groove. By setting the extrusion assembly, all piston discs are extruded.
[0008] Furthermore, a sealing ring is fixed to the right end of the left flange ring, and a sealing groove is provided at the left end of the right flange ring. The sealing ring is engaged inside the sealing groove, thereby further sealing the gap between the two flange rings.
[0009] Furthermore, it also includes reinforcing rings, of which two are provided, and the two reinforcing rings are respectively fixed to the surface of the two flange rings, thereby improving the strength of the flange rings.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This high load-bearing stainless steel welding flange has the following advantages: 1. By integrating the gas injection component and the sealing component, a dynamic sealing function is achieved. When the two flange rings are connected, the extrusion component drives the piston disc to move, injecting gas into the rubber sealing tube through the gas guide tube, causing it to expand and tightly fill the annular groove gap. This adaptive sealing mechanism effectively overcomes the failure problem of traditional gaskets caused by vibration or thermal expansion and contraction, improves the long-term sealing reliability in high pressure or corrosive environments, and reduces maintenance requirements. 2. The triangular support blocks are evenly distributed and directly connect the fixing ring and the flange ring circumference, forming a stable support network that disperses the external load borne by the connecting bolts. The reinforcing ring further strengthens the flange ring's resistance to deformation, ensuring that the connection point remains stable under high load or temperature fluctuation conditions, thereby extending the service life of the flange. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the front structure of this utility model.
[0012] Figure 2 This is a front sectional view of the present invention.
[0013] Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle.
[0014] Explanation of reference numerals in the attached figures: 1. Flange ring; 2. Fixing assembly; 21. Fixing ring; 22. Connecting bolt; 23. Fixing nut; 24. Triangular support block; 3. Injection assembly; 31. Piston disc; 32. Connecting disc; 33. Support spring; 4. Sealing assembly; 41. Air guide pipe; 42. Rubber sealing pipe; 5. Extrusion assembly; 51. Extrusion column; 52. Clamping block; 6. Sealing ring; 7. Reinforcing ring. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] Please see Figure 1-3 This embodiment provides a technical solution: a high load-bearing stainless steel welding flange, including a flange ring 1 and a fixing component 2; Flange ring 1: Two flange rings are provided. The left flange ring 1 has an air injection assembly 3 and a sealing assembly 4 installed inside. The right flange ring 1 has a compression assembly 5 installed at its left end. The air injection assembly 3 includes a piston disc 31, a connecting disc 32, and a support spring 33. The right end of the left flange ring 1 has a uniformly distributed groove, and the piston disc 31 is slidably connected inside the groove. The connecting disc 32 is fixed to the right end of the piston disc 31, and the support spring 33 is fixed to the left end of the piston disc 31. The support spring 33 is fixed inside the groove. The sealing assembly 4 includes an air guide pipe 41 and a rubber sealing pipe 42. The ring wall of the left flange ring 1 has uniformly distributed air guide holes, which communicate with the groove at the right end of the left flange ring 1. The air guide pipe 41 is fixed inside the air guide holes. Both flange rings 1 have annular grooves on their end faces, and rubber sealing pipes 42 are installed inside the two annular grooves. The rubber sealing pipes 42 are fixed inside the annular groove on the left side. All The right end of each air guide tube 41 is fixed to the surface of the rubber sealing tube 42. All air guide tubes 41 are connected to the inner cavity of the rubber sealing tube 42. The extrusion assembly 5 includes an extrusion column 51 and a locking block 52. The left end of the flange ring 1 on the right side is fixed with evenly distributed extrusion columns 51. All extrusion columns 51 are slidably connected to the inside of the evenly distributed sliding grooves opened on the right end of the flange ring 1 on the left side. The left end of the extrusion column 51 is fixed with a locking block 52. The right end of the connecting plate 32 is provided with a square groove. The locking block 52 is locked inside the square groove. By setting the extrusion assembly 5, all piston plates 31 are extruded. By setting the air guide tube 41, compressed gas is injected into the inside of the rubber sealing tube 42. By setting the air injection assembly 3, after the two flange rings 1 are connected, all piston plates 31 are extruded and moved to inject compressed gas into the inside of the rubber sealing tube 42, causing it to bulge. After the rubber sealing tube 42 bulges, the gap between the two flange rings 1 can be sealed. Fixing component 2 includes a fixing ring 21, connecting bolts 22, fixing nuts 23, and triangular support blocks 24. The fixing ring 21 is fixed on the circumferential surface of the flange ring 1. The end face of the fixing ring 21 has evenly distributed connecting holes. The connecting bolts 22 are installed inside the two corresponding connecting holes on the left and right sides. The fixing nuts 23 are threaded onto the surface of the connecting bolts 22. The fixing nuts 23 fit against the right end of the fixing ring 21 on the right side. The end face of the fixing ring 21 has evenly distributed triangular support blocks 24. All the triangular support blocks 24 are fixed on the circumferential surfaces of the two flange rings 1 respectively. The two flange rings 1 are connected by setting the fixing component 2.
[0017] Specifically: a sealing ring 6 is fixed to the right end of the flange ring 1 on the left side, and a sealing groove is opened at the left end of the flange ring 1 on the right side. The sealing ring 6 is engaged inside the sealing groove, and the gap between the two flange rings 1 is further sealed by setting the sealing ring 6.
[0018] It also includes a reinforcing ring 7, of which two are provided. The two reinforcing rings 7 are fixed on the surfaces of the two flange rings 1 respectively, thereby increasing the strength of the flange rings 1.
[0019] The working principle of the high-load-bearing stainless steel butt-welding flange provided by this utility model is as follows: Two flange rings 1 are connected by a fixing component 2. The fixing component 2 includes a fixing ring 21, a connecting bolt 22, a fixing nut 23, and a triangular support block 24. The connecting bolt 22 passes through the connecting hole of the fixing ring 21 and is tightened with the fixing nut 23, so that the two flange rings 1 are tightly mated. The triangular support block 24 provides additional support to distribute the load. When mating, the extrusion component 5 of the right flange ring 1 begins to act. The extrusion component 5 includes an extrusion column 51 and a locking block 52. The extrusion column 51 slides into the sliding groove of the left flange ring 1, and the locking block 52 engages with the square groove of the connecting plate 32 of the air injection component 3. The piston disc 31 is pushed to compress the support spring 33 and move to the left. The movement of the piston disc 31 forces the gas in the groove to be injected into the inner cavity of the rubber sealing tube 42 through the air guide tube 41 of the sealing assembly 4. After the rubber sealing tube 42 expands, it fills the annular groove on the end face of the two flange rings 1 to form the main seal. At the same time, the sealing ring 6 of the left flange ring 1 is engaged with the sealing groove of the right flange ring 1 to provide an auxiliary seal. The reinforcing ring 7 is fixed on the surface of the flange ring 1 to enhance the overall structural strength and prevent deformation under high load. Throughout the process, the support spring 33 helps the piston disc 31 to reset when unloading, ensuring reusability and ultimately achieving reliable sealing and stable connection under high load conditions.
[0020] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A high-load-bearing stainless steel welding flange, characterized in that: Includes flange ring (1) and fixing assembly (2); Flange ring (1): There are two. The left flange ring (1) is equipped with an air injection assembly (3) and a sealing assembly (4), and the right flange ring (1) is equipped with a compression assembly (5) at the left end. Fixed component (2): includes a fixed ring (21), connecting bolts (22), fixed nuts (23) and triangular support blocks (24). The fixed ring (21) is fixed on the circumferential surface of the flange ring (1). The fixed ring (21) has evenly distributed connecting holes on its end face. The connecting bolts (22) are installed inside the two corresponding connecting holes on the left and right sides. The fixed nuts (23) are threaded onto the surface of the connecting bolts (22). The fixed nuts (23) fit against the right end of the fixed ring (21) on the right side. The triangular support blocks (24) are evenly distributed on the end face of the fixed ring (21). All the triangular support blocks (24) are fixed on the circumferential surfaces of the two flange rings (1) respectively.
2. The high load-bearing stainless steel welding flange according to claim 1, characterized in that: The gas injection assembly (3) includes a piston disc (31), a connecting disc (32), and a support spring (33). The right end of the flange ring (1) on the left side is provided with a uniformly distributed sliding groove. The piston disc (31) is slidably connected inside the sliding groove. The connecting disc (32) is fixed to the right end of the piston disc (31). The support spring (33) is fixed to the left end of the piston disc (31). The support spring (33) is fixed inside the sliding groove.
3. A high-load-bearing stainless steel welding flange according to claim 2, characterized in that: The sealing assembly (4) includes an air guide pipe (41) and a rubber sealing pipe (42). The flange ring (1) on the left side has uniformly distributed air guide holes in its ring wall. The air guide holes are connected to the sliding groove opened at the right end of the flange ring (1) on the left side. An air guide pipe (41) is fixed inside the air guide hole. An annular groove is opened on the end face of both flange rings (1). A rubber sealing pipe (42) is installed inside the two annular grooves. The rubber sealing pipe (42) is fixed inside the annular groove on the left side. The right end of all the air guide pipes (41) is fixed on the surface of the rubber sealing pipe (42). All the air guide pipes (41) are connected to the inner cavity of the rubber sealing pipe (42).
4. A high-load-bearing stainless steel welding flange according to claim 2, characterized in that: The extrusion assembly (5) includes extrusion columns (51) and clamping blocks (52). The left end of the flange ring (1) on the right side is fixed with uniformly distributed extrusion columns (51). All the extrusion columns (51) are slidably connected to the inside of the uniformly distributed sliding grooves opened at the right end of the flange ring (1) on the left side. The left end of the extrusion column (51) is fixed with a clamping block (52). The right end of the connecting plate (32) is provided with a square groove, and the clamping block (52) is engaged inside the square groove.
5. A high-load-bearing stainless steel welding flange according to claim 1, characterized in that: A sealing ring (6) is fixed to the right end of the flange ring (1) on the left side, and a sealing groove is provided at the left end of the flange ring (1) on the right side. The sealing ring (6) is engaged inside the sealing groove.
6. A high-load-bearing stainless steel welding flange according to claim 1, characterized in that: It also includes a reinforcing ring (7), of which two reinforcing rings (7) are provided, and the two reinforcing rings (7) are respectively fixed on the surface of the two flange rings (1).