Aluminum alloy flange sealing structure

Abstract

The present invention relates to the field of flange sealing, specifically an aluminum alloy flange sealing structure, comprising a flange 1 and a flange 2 symmetrically arranged with each other, the flange 1 and the flange 2 being connected by a plurality of bolt assemblies, and a pipe being fixedly arranged on the inner side of the flange 1 and the flange 2. In the present invention, when the flange 1 and the flange 2 are installed and vibrate due to the influence of the circulating medium in the pipeline, after the sealing ring is worn, the extrusion preload of the sealing ring and the convex ring can be adjusted by the cooperation of the extrusion ring and the adjustment mechanism, so that the convex ring can fit tightly with the sealing ring, ensuring the sealing effect while eliminating the need to disassemble and replace the sealing ring of the flange 1 and the flange 2; at the same time, through the cooperation of the locking mechanism and the bolt assembly, the convex ring is not easily displaced when the preload of the installation bolt decreases due to vibration, further ensuring that the convex ring can fit tightly with the sealing ring, further ensuring the sealing performance of the flange 1 and the flange 2 after connection.

Description

Technical Field

[0001] The invention relates to the field of flange sealing, in particular to an aluminum alloy flange sealing structure. Background Art

[0002] In industrial fluid delivery systems, aluminum alloy flanges, as key connecting components, are widely used in numerous fields, including the chemical industry and energy transmission, thanks to their lightweight, high-strength, and corrosion-resistant properties. Traditional aluminum alloy flange sealing structures typically utilize a pre-set groove on the flange connection surface, within which a matching sealing ring is placed. When the flanges are fitted and assembled with bolts, the preloaded bolts squeeze the flange against the sealing ring, creating a seal at the flange connection surface and effectively preventing leakage of the pipeline medium.

[0003] However, when different media flow in the pipeline, when the flow rate of the medium is too fast, the pressure generated by the fluid will cause continuous slight vibration of the flange connection. This vibration causes repeated tiny sliding friction between the flange and the sealing ring. Long-term action will lead to surface wear and material fatigue of the sealing ring, affecting the sealing effect of the flange; at the same time, the vibration of the flange will cause the bolt preload force to continue to decay, resulting in insufficient extrusion force on the sealing ring, unable to form an effective seal, further affecting the sealing effect and exacerbating the risk of leakage. Summary of the Invention

[0004] In view of the above problems, an embodiment of the present application provides an aluminum alloy flange sealing structure, which can ensure the sealing of the connection between flange one and flange two when vibration occurs during use after flange one and flange two are connected.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions: The present invention provides an aluminum alloy flange sealing structure, comprising flange 1 and flange 2 symmetrically arranged with each other, flange 1 and flange 2 being connected by multiple sets of bolt assemblies, pipes being fixedly arranged on the inner sides of flange 1 and flange 2, an annular groove being provided on the left side of flange 1, and a convex ring being fixedly arranged on the right side of flange 2 and being plugged into the annular groove, and a sealing mechanism being provided in the annular groove.

[0006] The sealing mechanism includes an extrusion ring slidably arranged in an annular groove, a protective part and two fitted sealing rings. The protective part includes a connecting ring located in the annular groove, a protective ring is fixedly arranged on one side of the connecting ring, and the sides where the convex ring and the extrusion ring are close to each other are both provided with mounting grooves for use with the connecting ring.

[0007] A mounting ring is fixedly provided on the right side of flange 1, and an adjustment mechanism is provided on the mounting ring to push the extrusion ring to move for adjusting the pre-tightening force of the two sealing rings and the convex ring. The adjustment mechanism includes a plurality of moving rods fixedly provided on the right side of the extrusion ring, and an extrusion part is provided in the mounting ring to push the moving rods to move.

[0008] A plurality of rectangular grooves are provided on the left side of the flange 1. A locking mechanism is provided in the rectangular groove and cooperates with the bolt assembly to limit and lock the convex ring. The locking mechanism includes a locking piece fixedly provided in the rectangular groove.

[0009] Different installation positions of the protective parts and sealing rings can adapt to different circulating media in the pipeline.

[0010] According to a favorable embodiment, flange one and flange two are both provided with a plurality of mounting holes corresponding to each other, the mounting holes are connected to the rectangular groove, the bolt assembly includes mounting bolts inserted into the corresponding two mounting holes, and nuts are provided on the outer threads of the mounting bolts. Flange one and flange two are tightly fitted by the mounting bolts and nuts, and the pre-tightening force of the bolt assembly causes the convex ring to squeeze the sealing mechanism to form a sealing surface to seal flange one and flange two.

[0011] According to an advantageous embodiment, the protective member is located on the left side of the extrusion ring, and the connecting ring is located in the mounting groove on the extrusion ring, and the two fitted sealing rings are located between the protective ring and the convex ring.

[0012] According to an advantageous embodiment, the protective member is located on the left side of the extrusion ring, and the connecting ring is located in the mounting groove on the convex ring, and two fitted sealing rings are located between the protective ring and the extrusion ring.

[0013] According to a favorable embodiment, a thread groove is provided on the inner side of the mounting ring away from flange 1, the extrusion piece includes a threaded ring threaded in the thread groove, the right ends of multiple moving rods all penetrate into the thread groove and are fixed with a moving ring together, and the right side of the moving ring is in contact with the left side of the threaded ring.

[0014] According to an advantageous embodiment, a return spring 1 is sleeved on the outer side of the moving rod, and both ends of the return spring 1 are respectively connected to the inner wall of the thread groove and the moving ring, and a grip rod is fixedly provided on the right side of the thread ring.

[0015] According to a favorable embodiment, the locking member includes a slider slidably arranged in a rectangular groove, a locking rod is fixedly arranged on the side of the slider away from the mounting hole, a second return spring is sleeved on the outer side of the locking rod, and the two ends of the second return spring are respectively connected to the slider and the inner wall of the rectangular groove, and the side of the slider away from the locking rod is sloped and abuts against the outer side of the mounting bolt.

[0016] According to an advantageous embodiment, the convex ring is provided with a plurality of limiting holes which cooperate with the locking rods, and the end of the locking rod away from the slider passes through the rectangular groove and is inserted into the corresponding limiting holes.

[0017] According to an advantageous embodiment, a rubber pad is fixedly provided in the limiting hole, and an end of the locking rod away from the slider contacts the rubber pad.

[0018] According to an advantageous embodiment, a plurality of positioning holes are provided on the left side of the flange 1, and a plurality of positioning rods plugged into the positioning holes are fixedly provided on the right side of the flange 2.

[0019] Compared with the prior art, an aluminum alloy flange sealing structure provided by an embodiment of the present invention has the following beneficial effects: 1. When flange one and flange two in the present invention are affected by the circulating medium in the pipeline after installation and vibrate, after the sealing ring is worn, the extrusion preload force between the sealing ring and the convex ring can be adjusted through the cooperation of the extrusion ring and the adjustment mechanism, so that the convex ring can fit tightly with the sealing ring, ensuring the sealing effect while eliminating the need to disassemble and replace the sealing rings of flange one and flange two; at the same time, through the cooperation of the locking mechanism and the bolt assembly, the convex ring is not easily displaced when the preload force of the installation bolt decreases due to vibration, further ensuring that the convex ring can fit tightly with the sealing ring, thereby ensuring the sealing performance of flange one and flange two after connection.

[0020] 2. The present invention is provided with a bolt assembly and a locking mechanism. During the installation of flange 1 and flange 2, the locking rod can limit and lock the convex ring by squeezing the slider with the installation bolts. When flange 1 and flange 2 vibrate and the pre-tightening force of the installation bolts decreases, the convex ring is not easily displaced, so that the convex ring can always fit with the sealing ring, thereby ensuring the sealing effect.

[0021] 3. The present invention is provided with a sealing mechanism and an adjusting mechanism, which drives the extrusion ring to move and extrude the sealing ring by rotating the threaded ring, so that when the sealing ring is damaged due to vibration, the extrusion ring can further strengthen the extrusion force of the sealing ring on the sealing ring, effectively avoiding the generation of a gap between the sealing ring and the convex ring, and at the same time making the sealing ring continue to be in close contact with the inner wall of the annular groove, thereby ensuring the sealing effect, and as the service life of flange 1 and flange 2 is extended, the staff can reasonably change the extrusion force on the sealing ring by adjusting the use position of the extrusion ring, thereby further ensuring the sealing performance of the sealing ring.

[0022] 4. The present invention is provided with a protective part, which can reasonably change the position of the protective part and the sealing ring installed in the annular groove according to the different media flowing in the pipeline, thereby ensuring the sealing effect while improving the protection effect of the sealing ring, and can adapt to different media environments without replacing parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the present invention.

[0024] Figure 2 This is a structural diagram of the connection between flange 1 and the mounting bolts in the present invention.

[0025] Figure 3 This is a structural diagram of the connection between flange 2 and the convex ring in the present invention.

[0026] Figure 4 It is a partial cross-sectional structural diagram of the present invention.

[0027] Figure 5 for Figure 4 A magnified view of the structure in part A.

[0028] Figure 6 It is a cross-sectional view of the connection structure between the adjustment mechanism and the extrusion ring in the present invention.

[0029] Figure 7 This is a diagram showing the positions and separation states of the convex ring, the sealing ring, the protective member and the extrusion ring when a normal medium flows through the pipeline in the present invention.

[0030] Figure 8 This is a diagram showing the positions and separation states of the convex ring, protective member, sealing ring and extrusion ring when a corrosive medium flows through the pipeline in the present invention.

[0031] The accompanying drawings are as follows: 1. Flange 1; 2. Flange 2; 3. Bolt assembly; 31. Mounting bolt; 32. Nut; 4. Pipe; 5. Annular groove; 6. Convex ring; 7. Sealing mechanism; 71. Extrusion ring; 72. Protective member; 721. Connecting ring; 722. Protective ring; 73. Sealing ring; 8. Mounting ring; 9. Adjusting mechanism; 91. Moving rod; 92. Extrusion member; 921. Threaded ring; 922. Moving ring; 923. Reset spring 1; 924. Grip; 10. Rectangular groove; 11. Locking mechanism; 111. Locking member; 112. Slider; 113. Locking rod; 114. Reset spring 2; 12. Mounting hole; 13. Mounting groove; 14. Rubber pad; 15. Positioning hole; 16. Positioning rod; 17. Limiting hole. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 - Figure 8 This application is described in further detail.

[0033] Example 1

[0034] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 An aluminum alloy flange sealing structure includes a flange 1 and a flange 2 symmetrically arranged with each other. The flange 1 and the flange 2 are connected by multiple groups of bolt assemblies 3. Pipes 4 are fixedly arranged on the inner sides of the flange 1 and the flange 2. An annular groove 5 is opened on the left side of the flange 1, and a convex ring 6 is fixedly arranged on the right side of the flange 2 and is plugged into the annular groove 5. A sealing mechanism 7 is arranged in the annular groove 5. The pre-tightening force of the bolt assembly 3 causes the convex ring 6 to squeeze the sealing mechanism 7 to form a sealing surface to seal the flange 1 and the flange 2.

[0035] See Figure 3 、 Figure 4 、 Figure 5 Both flange 1 and flange 2 are provided with multiple mounting holes 12 at corresponding positions. A plurality of rectangular grooves 10 are provided on the left side of flange 1. The mounting holes 12 are connected to the rectangular grooves 10. The bolt assembly 3 includes mounting bolts 31 inserted into the corresponding two mounting holes 12. The outer thread of the mounting bolt 31 is provided with a nut 32. Flange 1 and flange 2 are tightly fitted by the mounting bolts 31 and the nuts 32.

[0036] See Figure 2 and Figure 3 A plurality of positioning holes 15 are provided on the left side of flange 1, and a plurality of positioning rods 16 connected to the positioning holes 15 are fixedly provided on the right side of flange 2.

[0037] When installing flange 1 and flange 2, the staff aligns the positioning rod 16 on flange 2 with the positioning hole 15 on flange 1, and then inserts the positioning rod 16 into the positioning hole 15. At this time, the convex ring 6 is also inserted into the annular groove 5. In the process of the convex ring 6 being fully inserted into the annular groove 5, the convex ring 6 squeezes the sealing mechanism 7 in the annular groove 5 to form a sealing surface. Then, the mounting bolts 31 are passed through the corresponding mounting holes 12 on flange 1 and flange 2 in turn, and the nuts 32 are on the mounting bolts 31. Then, the nuts 32 are tightened and the installation of flange 1 and flange 2 is completed through the cooperation of the mounting bolts 31. At this time, the sealing connection between flange 1 and flange 2 can be achieved through the sealing mechanism 7.

[0038] See Figure 5 and Figure 7 The sealing mechanism 7 includes an extrusion ring 71 slidably arranged in the annular groove 5, a protective member 72 and two fitted sealing rings 73. The protective member 72 includes a connecting ring 721 located in the annular groove 5. A protective ring 722 is fixedly provided on one side of the connecting ring 721 (the protective ring 722 can be made of titanium, tantalum or nickel-based alloy, etc., which is corrosion-resistant and can be deformed when squeezed), and a mounting groove 13 for use with the connecting ring 721 is provided on the side where the convex ring 6 and the extrusion ring 71 are close to each other.

[0039] See Figure 7 The protective member 72 is located on the left side of the extrusion ring 71 , and the connecting ring 721 is located in the mounting groove 13 on the extrusion ring 71 , and the two fitting sealing rings 73 are both located between the protective ring 722 and the convex ring 6 .

[0040] In the process of flange 1 and flange 2 approaching each other, when the medium flowing in the pipeline 4 is normal medium, the protective member 72 is first placed in the annular groove 5. At this time, the connecting ring 721 is close to the extrusion ring 71, and then the two sealing rings 73 are placed in the annular groove 5. Then, after the convex ring 6 is inserted into the annular groove 5, the two sealing rings 73 are squeezed and the connecting ring 721 is pushed to move into the mounting groove 13 on the extrusion ring 71. At this time, the two sealing rings 73, the protective ring 722 and the extrusion ring 71 are tightly fitted with each other, and the sealing ring 73 is elastically deformed by the extrusion to tightly fill the gap between the convex ring 6 and the annular groove 5. The flow direction of the medium in the pipeline 4 to the annular groove 5 is as follows: Figure 7 As shown by the middle arrow, a sealing barrier is formed for the medium flowing in the pipeline 4 through the sealing ring 73. The two fitting sealing rings 73 form a double sealing structure. The sealing ring 73 in contact with the convex ring 6 bears the main pressure, and the sealing ring 73 away from the convex ring 6 compensates for the small leakage path, further improving the sealing effect.

[0041] See Figure 1 、 Figure 2 and Figure 4 A mounting ring 8 is fixedly provided on the right side of the flange 1, and an adjusting mechanism 9 is provided on the mounting ring 8 to push the extrusion ring 71 to move and adjust the preload force of the two sealing rings 73 and the convex ring 6. The adjusting mechanism 9 includes a plurality of moving rods 91 fixedly provided on the right side of the extrusion ring 71, and an extrusion member 92 is provided in the mounting ring 8 to push the moving rod 91 to move.

[0042] See Figure 5 and Figure 6 A threaded groove is formed on the inner side of the mounting ring 8, away from the flange 1. The extruded member 92 includes a threaded ring 921 threadedly disposed within the threaded groove. The right ends of the multiple movable rods 91 extend through the threaded groove and are fixedly mounted with a movable ring 922. The right side of the movable ring 922 contacts the left side of the threaded ring 921. A return spring 923 is sleeved on the outer side of the movable rod 91. The two ends of the return spring 923 are respectively connected to the inner wall of the threaded groove and the movable ring 922. A gripping rod 924 is fixedly mounted on the right side of the threaded ring 921.

[0043] After flange 1 and flange 2 are installed, when the flow rate of the medium flowing in the pipeline 4 is too fast, flange 1 and flange 2 will vibrate slightly, which will cause the sealing ring 73 in the annular groove 5 to be damaged due to vibration and friction. In order to ensure the sealing effect, the staff can hold the grip rod 924 to drive the threaded ring 921 to rotate. The rotation of the threaded ring 921 drives the movable ring 922 to move in the installation ring 8. The movement of the installation ring 8 drives the extrusion ring 71 to move through the moving rod 91, thereby further strengthening the extrusion force of the extrusion ring 71 on the two sealing rings 73, effectively avoiding the formation of a gap between the sealing ring 73 and the convex ring 6, and at the same time making the sealing ring 73 continue to be in close contact with the inner wall of the annular groove 5, ensuring the sealing effect of the medium flowing in the pipeline 4, and there is no need to disassemble flange 1 and flange 2 and replace the sealing ring 73. As the service life of flange 1 and flange 2 is extended, the staff can reasonably change the extrusion force on the sealing ring 73 by adjusting the use position of the extrusion ring 71, further ensuring the sealing performance of the sealing ring 73.

[0044] See Figure 2 、 Figure 4 and Figure 5 A locking mechanism 11 is provided within the rectangular groove 10, cooperating with the bolt assembly 3 to limit and lock the protruding ring 6. The locking mechanism 11 includes a locking member 111 fixedly disposed within the rectangular groove 10. The locking member 111 includes a slider 112 slidably disposed within the rectangular groove 10. A locking rod 113 is fixedly disposed on the side of the slider 112 away from the mounting hole 12. A second return spring 114 is sleeved around the outer side of the locking rod 113. The two ends of the second return spring 114 are respectively connected to the slider 112 and the inner wall of the rectangular groove 10. The side of the slider 112 away from the locking rod 113 is sloped and abuts against the outer side of the mounting bolt 31.

[0045] See Figure 3 and Figure 5 A plurality of limiting holes 17 are provided on the convex ring 6 for engaging with the locking rod 113. The end of the locking rod 113 away from the slider 112 passes through the rectangular groove 10 and is inserted into the corresponding limiting hole 17. A rubber pad 14 is fixed in the limiting hole 17, and the end of the locking rod 113 away from the slider 112 contacts the rubber pad 14.

[0046] In the process of connecting flange 1 1 and flange 2 2 through the bolt assembly 3, when the mounting bolt 31 is passed through the mounting hole 12 on flange 1 1 and flange 2 2, the mounting bolt 31 will contact the slider 112 and squeeze the slider 112. The slider 112 will slide in the rectangular groove 10 under the squeezing. The sliding of the slider 112 drives the locking rod 113 to move toward a position close to the convex ring 6 and insert it into the limiting hole 17. At this time, the locking rod 113 contacts the rubber pad 14 in the limiting hole 17 to avoid direct hard collision between the locking rod 113 and the inner wall of the limiting hole 17. Then the staff can install the nut 32 on the mounting bolt 31.

[0047] When flange 1 and flange 2 vibrate and the pre-tightening force of the mounting bolt 31 decreases, the convex ring 6 can be locked by plugging the locking rod 113 into the limiting hole 17, so that the convex ring 6 will not shift, thereby ensuring that the convex ring 6 can always be in contact with the sealing ring 73 without gaps, thereby further ensuring the sealing effect of the medium flowing in the pipeline 4.

[0048] Example 2

[0049] See Figure 8 The protective member 72 is located on the left side of the extrusion ring 71 , and the connecting ring 721 is located in the mounting groove 13 on the convex ring 6 , and the two fitting sealing rings 73 are both located between the protective ring 722 and the extrusion ring 71 .

[0050] When the medium flowing in the pipeline 4 is a corrosive medium, during the installation of flange 1 and flange 2, the two sealing rings 73 can be placed in the annular groove 5 first, and then the protective member 72 can be placed in the annular groove 5. At this time, the connecting ring 721 is close to the mounting groove 13 on the convex ring 6, and then the convex ring 6 will contact the connecting ring 721 when it is inserted into the annular groove 5 and push the connecting ring 721 to move. When flange 1 and flange 2 are fitted together, the connecting ring 721 is located in the mounting groove 13 on the convex ring 6, and then the protective ring 722, the two sealing rings 73, and the extrusion ring 71 are tightly fitted to each other. The flow direction of the medium in the pipeline 4 to the annular groove 5 is as follows: Figure 8 As shown by the middle arrow, at this time, the protective ring 722 uses its own corrosion-resistant and deformable properties to fit tightly against the inner wall of the annular groove 5 after being compressed, preventing the corrosive medium from penetrating into the sealing ring 73, greatly improving the protection of the sealing ring 73 and extending the service life of the sealing ring 73.

[0051] During specific work, when installing flange 1 and flange 2, the positions of the sealing ring 73 and the protective member 72 installed in the annular groove 5 can be reasonably adjusted according to the different circulating media in the pipeline 4. When the circulating medium in the pipeline 4 is a normal medium, the protective member 72 can be placed first and then the sealing ring 73. When the circulating medium in the pipeline 4 is a corrosive medium, the sealing ring 73 can be placed first and then the protective member 72. At this time, the protective member 72 can be used to improve the protection of the sealing ring 73. Then, when flange 1 and flange 2 are close to each other, the convex ring 6 will be inserted into the annular groove 5 to squeeze the sealing ring 73, so that the sealing ring 73 elastically deforms to tightly fill the gap between the convex ring 6 and the annular groove 5, forming a sealing barrier to the circulating medium in the pipeline 4.

[0052] When the mounting bolts 31 are passed through the mounting holes 12 on flange 1 and flange 2, the locking mechanism 11 can be used to limit and lock the convex ring 6. When the flow rate of the medium flowing through the pipeline 4 is too fast and causes flange 1 and flange 2 to vibrate slightly, the convex ring 6 will not shift, thereby ensuring that the convex ring 6 can always be in contact with the sealing ring 73 and no gap is easily formed. When the sealing ring 73 is worn due to vibration, the extrusion force on the sealing ring 73 can be adjusted by the adjusting mechanism 9, and the gap between the sealing ring 73 and the convex ring 6 can be effectively avoided. At the same time, the sealing ring 73 continues to be tightly attached to the inner wall of the annular groove 5, thereby ensuring the sealed connection between flange 1 and flange 2 during vibration.

[0053] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0054] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0055] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An aluminum alloy flange sealing structure, comprising a first flange and a second flange symmetrically arranged with each other, the first flange and the second flange being connected by a plurality of bolt assemblies, and a pipe being fixedly installed on the inner side of each flange, characterized in that: An annular groove is provided on the left side of the flange 1, and a convex ring plugged into the annular groove is fixedly provided on the right side of the flange 2, and a sealing mechanism is provided in the annular groove; The sealing mechanism includes an extrusion ring slidably arranged in the annular groove, a protective member and two fitted sealing rings. The protective member includes a connecting ring located in the annular groove, a protective ring is fixedly arranged on one side of the connecting ring, and a mounting groove for use with the connecting ring is provided on the side where the convex ring and the extrusion ring are close to each other; A mounting ring is fixedly provided on the right side of the flange 1, and an adjustment mechanism is provided on the mounting ring for pushing the extrusion ring to move and adjusting the preload force of the two sealing rings and the convex ring. The adjustment mechanism includes a plurality of moving rods fixedly provided on the right side of the extrusion ring, and an extrusion member is provided in the mounting ring to push the moving rods to move; A plurality of rectangular grooves are formed on the left side of the flange 1, wherein a locking mechanism is provided in the rectangular groove and cooperates with the bolt assembly to limit and lock the convex ring. The locking mechanism includes a locking member fixedly provided in the rectangular groove; Different installation positions of protective parts and sealing rings can adapt to different circulating media in the pipeline; The flange 1 and the flange 2 are both provided with a plurality of mounting holes corresponding to each other; The locking member includes a slider slidably arranged in the rectangular groove, a locking rod fixedly arranged on the side of the slider away from the mounting hole, a second return spring sleeved on the outer side of the locking rod, the two ends of the second return spring being respectively connected to the slider and the inner wall of the rectangular groove, and the side of the slider away from the locking rod being sloped and abutting against the outer side of the mounting bolt; The convex ring is provided with a plurality of limiting holes for engaging with the locking rods, and the end of the locking rod away from the slider passes through the rectangular groove and is inserted into the corresponding limiting hole; A rubber pad is fixedly arranged in the limiting hole, and one end of the locking rod away from the sliding block contacts the rubber pad.

2. The aluminum alloy flange sealing structure according to claim 1, characterized in that: The mounting hole is connected to the rectangular groove, and the bolt assembly includes mounting bolts inserted into the corresponding two mounting holes. The outer threads of the mounting bolts are provided with nuts. Flange one and flange two are tightly fitted through the mounting bolts and nuts. The pre-tightening force of the bolt assembly causes the convex ring to squeeze the sealing mechanism to form a sealing surface to seal flange one and flange two.

3. The aluminum alloy flange sealing structure according to claim 1, characterized in that: The protective member is located on the left side of the extrusion ring, and the connecting ring is located in the mounting groove on the extrusion ring. The two fitted sealing rings are both located between the protective ring and the convex ring.

4. The aluminum alloy flange sealing structure according to claim 1, characterized in that: The protective member is located on the left side of the extrusion ring, and the connecting ring is located in the mounting groove on the convex ring, and the two fitted sealing rings are both located between the protective ring and the extrusion ring.

5. The aluminum alloy flange sealing structure according to claim 1, characterized in that: A threaded groove is provided on the inner side of the mounting ring away from flange 1, and the extrusion piece includes a threaded ring threaded in the threaded groove. The right ends of multiple moving rods all penetrate into the threaded groove and are fixed with a moving ring together, and the right side of the moving ring contacts the left side of the threaded ring.

6. The aluminum alloy flange sealing structure according to claim 5, characterized in that: The outer side of the moving rod is sleeved with a return spring 1, and the two ends of the return spring 1 are respectively connected to the inner wall of the thread groove and the moving ring, and a grip rod is fixedly provided on the right side of the thread ring.

7. The aluminum alloy flange sealing structure according to claim 1, characterized in that: A plurality of positioning holes are provided on the left side of the flange 1, and a plurality of positioning rods plugged into the positioning holes are fixedly provided on the right side of the flange 2.

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