Quick mounting and positioning mechanism for flue expansion joint

Abstract

The invention provides a quick mounting and positioning mechanism for a flue expansion joint, which belongs to the technical field of expansion joint mounting and comprises a mounting mechanism, the mounting mechanism comprises an expansion pipe, fixed flanges are fixedly arranged at two ends of the expansion pipe, movable flanges are rotatably connected to the backs of the fixed flanges, and butt flanges are arranged at the front ends of the fixed flanges in an abutting manner; a plurality of fixing pins are inserted between the fixed flange and the butt flange for fixing, a limiting assembly is arranged between the fixed flange and the movable flange, a rotary fixing assembly is arranged in an inner cavity of the movable flange, and the rotary fixing assembly is used for rapidly fixing the fixing pins; and the sealing mechanism comprises a rubber ring arranged on the ring face of the front end of the fixed flange in a sliding mode, a telescopic assembly is arranged on the upper portion of the rubber ring, and the telescopic assembly is used for pushing the rubber ring to seal the gap between the fixed flange and the butt flange again. According to the method, the effects of quickly installing and positioning the flue expansion joint and quickly positioning a leakage point are achieved.

Description

Technical Field

[0001] This invention belongs to the technical field of expansion joint installation, specifically relating to a quick installation and positioning mechanism for flue expansion joints. Background Technology

[0002] In recent years, flue gas systems have been increasingly widely used in industries such as power and chemical engineering. As a key component for absorbing the thermal expansion and contraction deformation of flues, the installation accuracy and efficiency of expansion joints directly affect the operational stability of flue gas systems.

[0003] Currently, most flue gas expansion joints are installed using the traditional flange bolt connection method. Multiple bolts are sequentially tightened onto the flange to secure the expansion joint to the flue. While this method meets basic installation requirements, the installation and positioning process is cumbersome, requiring repeated calibration of the flange hole positions. The bolt tightening operation is time-consuming and labor-intensive, making rapid installation difficult. Furthermore, if leaks occur in the flange after long-term use, manual inspection of each leak point is necessary, which is time-consuming, labor-intensive, and poses safety hazards, severely impacting maintenance efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a quick installation and positioning mechanism for flue expansion joints, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A quick installation and positioning mechanism for a flue gas expansion joint includes an installation mechanism comprising an expansion tube, both ends of which are fixedly provided with fixed flanges. A movable flange is rotatably connected to the back of the fixed flange. A mating flange is abutted against the front end of the fixed flange. A plurality of fixing pins are inserted between the fixed flange and the mating flange for fixation. A limit component is provided between the fixed flange and the movable flange. A rotating fixing component is provided in the inner cavity of the movable flange for quickly fixing the fixing pins. The sealing mechanism includes a rubber ring that is slidably disposed on the front end ring surface of the fixed flange. A telescopic component is provided on the upper part of the rubber ring. The telescopic component is used to push the rubber ring to seal the gap between the fixed flange and the mating flange again. The warning mechanism includes an expanding annular groove located on the upper end of the rubber ring of the fixed flange, and a plurality of energy storage components are provided in the expanding annular groove. The energy storage components are used to provide warnings and reminders when there is a gas leak.

[0006] As a preferred embodiment of the flue expansion joint quick installation and positioning mechanism of the present invention, the limiting component includes an L-shaped annular groove formed on the outer ring side of the front surface of the movable flange, an L-shaped annular rod slidably disposed in the L-shaped annular groove, and the L-shaped annular rod being fixedly disposed on the outer ring side of the back of the fixed flange.

[0007] As a preferred embodiment of the flue expansion joint quick installation and positioning mechanism of the present invention, the rotating fixing component includes an inner ring groove opened inside the movable flange through which the fixing pin passes. A convex ring is fixedly provided in the middle of the upper and lower ring surfaces of the inner ring groove, and a plurality of concave grooves are slidably provided on the outer surfaces of the upper and lower convex rings. The concave grooves are opened on the fixing pin.

[0008] As a preferred embodiment of the flue expansion joint quick installation and positioning mechanism of the present invention, the rotating fixing assembly further includes several arc-shaped guide grooves opened on the rear side wall of the inner ring groove. The arc-shaped guide grooves are movably connected to the fixing pins, and a fixing pin is inserted into the upper part of one end of the arc-shaped guide groove. A slot is inserted into the outside of the fixing pin, and the slot is opened in several concave grooves.

[0009] As a preferred embodiment of the rapid installation and positioning mechanism for flue expansion joints of the present invention, the telescopic component includes several arc-shaped fixing grooves that penetrate through the outer ring side of the fixed flange. Each of the arc-shaped fixing grooves has an arc-shaped plate fixedly installed in its inner cavity. An oblique sliding groove is provided in the middle of the arc-shaped plate, and a transverse sliding groove is provided in the middle of the side wall of the oblique sliding groove. The inner cavity of the transverse sliding groove is connected to the inner cavity of the oblique sliding groove, and the transverse sliding groove penetrates through the fixed flange.

[0010] As a preferred embodiment of the rapid installation and positioning mechanism for flue expansion joints of the present invention, an L-shaped push plate is slidably arranged in the inner cavity of the transverse sliding groove, and a cylindrical push rod is fixedly arranged at the rear end of the L-shaped push plate. The cylindrical push rod is slidably arranged in the inner cavity of the inclined sliding groove.

[0011] As a preferred embodiment of the rapid installation and positioning mechanism for the flue expansion joint of the present invention, several of the power storage components include a spring telescopic rod fixedly disposed on the outer wall of the inner cavity of the outer expansion ring groove, a strip-shaped limiting rod slidably disposed at the telescopic end of the spring telescopic rod, the strip-shaped limiting rod movably penetrating through the fixed flange, and a flagpole inserted into the end of the strip-shaped limiting rod away from the spring telescopic rod, the flagpole movably penetrating through the inner cavity of the movable flange.

[0012] As a preferred embodiment of the rapid installation and positioning mechanism for flue expansion joints of the present invention, a compression spring is elastically provided at the rear end of the flagpole, and a limiting groove is provided at the front end of the flagpole, wherein the limiting groove is inserted into a strip-shaped limiting rod.

[0013] As a preferred embodiment of the quick installation and positioning mechanism for the flue expansion joint of the present invention, a small red flag is provided between the limiting groove and the compression spring, and the small red flag is used for warning purposes.

[0014] As a preferred embodiment of the rapid installation and positioning mechanism for flue expansion joints of the present invention, a square groove is provided at the end of the strip-shaped limiting rod away from the limiting groove. Two triangular blocks are slidably abutted in the inner cavity of the square groove. The two triangular blocks are respectively horizontally fixed on both sides of the telescopic end of the spring telescopic rod, and the inclined surfaces of the two triangular blocks are opposite.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the combined action of fixed flange, movable flange, fixed pin and rotating fixing components, the flue expansion joint can be quickly installed and positioned without repeatedly calibrating the flange hole position and tightening the bolts one by one, thus improving installation efficiency.

[0016] 2. Through the linkage between the energy storage component in the outer expansion ring groove and the rubber ring of the sealing mechanism, a small red flag can be triggered to open as a warning when gas leaks. This eliminates the need for manual inspection, quickly locates the leak point, reduces safety hazards, and improves maintenance efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 A schematic diagram of the overall installation and positioning mechanism for flue expansion joints; Figure 2 A side sectional view of the back structure of the three flanges for the quick installation and positioning mechanism of the flue expansion joint; Figure 3 Enlarged side section diagram of the fixed and movable flanges for the quick installation and positioning mechanism of the flue expansion joint; Figure 4 Exploded side view of the fixed and movable flanges for the rapid installation and positioning mechanism of the flue expansion joint; Figure 5 A schematic diagram of the slotted movable flange for quick installation and positioning mechanism of flue expansion joint.

[0018] Figure 6 A schematic diagram of the slotted fixing flange for the quick installation and positioning mechanism of the flue expansion joint.

[0019] Figure 7 A schematic diagram of the telescopic assembly for the quick installation and positioning mechanism of the flue expansion joint.

[0020] Figure 8 for Figure 2 Enlarged view of point A.

[0021] Figure 9 A schematic diagram showing the location of the energy storage component for the quick installation and positioning mechanism of the flue expansion joint.

[0022] Figure 10 A schematic diagram of the explosion of the energy storage component for the rapid installation and positioning mechanism of the flue expansion joint.

[0023] In the diagram: 10. Expansion tube; 11. Fixed flange; 12. Movable flange; 13. Butt flange; 14. Fixing pin; 15. Limiting assembly; 151. L-shaped annular groove; 152. L-shaped ring rod; 16. Rotating fixing assembly; 161. Inner annular groove; 162. Convex ring; 163. Concave groove; 164. Arc-shaped guide groove; 165. Fixing pin; 166. Slot; 20. Rubber ring; 21. Telescopic Components; 211, Arc-shaped fixing groove; 212, Arc-shaped plate; 213, Inclined sliding groove; 214, Horizontal sliding groove; 215, L-shaped push plate; 216, Cylindrical push rod; 30, Outer expansion ring groove; 31, Power storage component; 311, Spring telescopic rod; 312, Strip-shaped limiting rod; 313, Flagpole; 314, Compression spring; 315, Limiting groove; 316, Small red flag; 317, Square groove; 318, Triangular block. Detailed Implementation

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Example 1 Reference Figures 1-6 This is the first embodiment of the present invention. This embodiment provides a quick installation and positioning mechanism for flue expansion joints, which achieves the effects of quick installation and fixing of expansion tube 10 and quick positioning in case of leakage. It includes an installation mechanism, which includes an expansion tube 10. Fixed flanges 11 are fixedly provided at both ends of the expansion tube 10. A movable flange 12 is rotatably connected to the back of the fixed flange 11. A docking flange 13 is abutted at the front end of the fixed flange 11. A plurality of fixed pins 14 are inserted between the fixed flange 11 and the docking flange 13 for fixing. A limit component 15 is provided between the fixed flange 11 and the movable flange 12. A rotating fixing component 16 is provided in the inner cavity of the movable flange 12. The rotating fixing component 16 is used to quickly fix the fixing pins 14. The sealing mechanism includes a rubber ring 20 that is slidably disposed on the front end ring surface of the fixed flange 11. A telescopic component 21 is provided on the upper part of the rubber ring 20. The telescopic component 21 is used to push the rubber ring 20 to seal the gap between the fixed flange 11 and the mating flange 13 again. The warning mechanism includes an outer expansion groove 30 located on the upper end of the rubber ring 20 on the fixed flange 11. Several energy storage components 31 are provided in the outer expansion groove 30. The energy storage components 31 are used to provide warnings when there is a gas leak.

[0026] Specifically, the fixed flange 11 and the movable flange 12 can be rotatably connected by the limiting component 15, and the fixing pin 14 can be quickly rotated and fixed by the rotating fixing component 16. It should be noted that the mating flange 13 has a groove that matches the opening of the expansion tube 10, so that the expansion tube 10 and the mating flange 13 can form a more precise fit, thereby achieving a better sealing effect.

[0027] Furthermore, the limiting component 15 includes an L-shaped annular groove 151 formed on the outer ring side of the front surface of the movable flange 12, an L-shaped ring rod 152 slidably disposed in the L-shaped annular groove 151, and the L-shaped ring rod 152 fixedly disposed on the outer ring side of the back of the fixed flange 11.

[0028] The rotating fixing assembly 16 includes an inner ring groove 161 formed inside the movable flange 12 through which the fixing pin 14 passes. A convex ring 162 is fixedly provided in the middle of the upper and lower ring surfaces of the inner ring groove 161. Several concave grooves 163 are slidably provided on the outside of the upper and lower convex rings 162. The concave grooves 163 are formed on the fixing pin 14. The rotating fixing assembly 16 also includes several arc-shaped guide grooves 164 formed on the rear side wall of the inner ring groove 161. The arc-shaped guide grooves 164 are movably connected through the fixing pin 14. A fixing pin 165 is inserted into the upper part of one end of the arc-shaped guide groove 164. A slot 166 is inserted into the outside of the fixing pin 165. The slot 166 is formed in the several concave grooves 163.

[0029] The arc length of the arc-shaped guide groove 164 is less than the distance between the two fixing pins 14, thus more stably limiting and fixing the fixing pins 14. It should be noted that each fixing pin 14 corresponds to one arc-shaped guide groove 164, and an opening with the same diameter as the fixing pin 14 is opened on the arc-shaped guide groove 164 at the insertion end of the fixing pin 14. The diameter of this opening is larger than the diameter of the concave groove 163. Similarly, this opening is opened on the fixing flange 11, so that the fixing pin 14 can be inserted into the fixing flange 11 and the movable flange 12, so that the mating flange 13 can be fixed to both of them. At the same time, when the fixing pin 14 is inserted, the protruding convex ring 162 will not prevent the fixing pin 14 from being unable to be inserted into the movable flange 12.

[0030] In use, first align the fixed flanges 11 at both ends of the expansion tube 10 with the corresponding mating flanges 13, so that the grooves on the mating flanges 13 fit precisely with the openings of the expansion tube 10, thus initially achieving positional alignment. Then, insert several fixing pins 14 into the corresponding holes of the fixed flanges 11 and the mating flanges 13. At this time, the fixing pins 14 will penetrate into the inner annular groove 161 of the movable flange 12. Since the fixed flange 11 and the movable flange 12 are mutually slidably limited by the L-shaped ring rod 152 and the L-shaped annular groove 151, rotation is achieved, allowing the movable flange 12 to rotate after the fixing pins 14 are inserted. During rotation, the fixing pin 14 slides along the arc-shaped guide groove 164. At the same time, the concave groove 163 on the fixing pin 14 engages with the convex ring 162 in the inner ring groove 161. When the fixing pin 14 slides to the end of the arc-shaped guide groove 164, the fixing pin 165 is inserted into the slot 166, completing the quick fixing of the fixing pin 14 and realizing the installation and fixing of the expansion tube 10. It should be noted that the fixing pin 165 is externally elastically connected with a return spring, and the end of the fixing pin 165 that passes through the movable flange 12 can be clamped out using a clamp. Since the clamp is existing technology, its structural principle will not be described in detail here.

[0031] During the rotation of the movable flange 12, the telescopic component 21 will push the rubber ring 20, which is slidably set on the front end ring surface of the fixed flange 11, to move towards the mating flange 13 side, so that the rubber ring 20 covers the gap between the fixed flange 11 and the mating flange 13, performs secondary sealing, and enhances the overall sealing performance.

[0032] When a gas leak occurs, the leaking gas will first come into contact with the rubber ring 20. As the amount of leaking gas increases and the pressure increases, the gas will cause the rubber ring 20 to expand in the cavity of the outer expansion ring groove 30. At this time, the expanded rubber ring 20 will trigger the energy storage component 31 in the outer expansion ring groove 30 under the action of gas pressure, thereby issuing a warning and realizing rapid location of the leak.

[0033] Example 2 Reference Figures 3-7This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a sealing mechanism for the quick installation and positioning mechanism of the flue expansion joint, which solves the problem that the emergency measures of ordinary flanges are inadequate when gas leaks. It includes a telescopic component 21, which includes several arc-shaped fixing grooves 211 that are opened through the outer ring side of the fixed flange 11. Arc-shaped plates 212 are fixedly installed in the inner cavity of each of the arc-shaped fixing grooves 211. An inclined sliding groove 213 is opened in the middle of the arc-shaped plate 212. A transverse sliding groove 214 is provided in the middle of the side wall of the inclined sliding groove 213. The inner cavity of the transverse sliding groove 214 is connected to the inner cavity of the inclined sliding groove 213, and the transverse sliding groove 214 passes through the fixed flange 11. An L-shaped push plate 215 is slidably installed in the inner cavity of the transverse sliding groove 214. A cylindrical push rod 216 is fixedly installed at the rear end of the L-shaped push plate 215. The cylindrical push rod 216 is slidably installed in the inner cavity of the inclined sliding groove 213.

[0034] Specifically, the rubber ring 20 has rigid fixed rings at both its front and rear ends, and the rear ring is inserted and limited in the groove on the back of the L-shaped ring rod 152 on the fixed flange 11. This allows the rubber ring 20 to slide out and seal the gap between the fixed flange 11 and the mating flange 13 again, preventing leaked gas from escaping. The arc plate 212 is fixedly connected to the fixed flange 11, while the cylindrical push rod 216 is slidably connected to the movable flange 12 through a sliding groove (not shown in the diagram). When the movable flange 12 rotates, it will drive the cylindrical push rod 216 to move in the inclined sliding groove 213. Then, the L-shaped push plate 215 is pushed out by the cylindrical push rod 216. The lower end of the L-shaped push plate 215 protruding from the transverse sliding groove 214 is provided with a small cylinder. The small cylinder is slidably connected to the outer fixing ring of the rubber ring 20. When the L-shaped push plate 215 moves out, it can push the rubber ring 20 to move synchronously. It should be noted that the mating flange 13 is provided with a groove that allows the rubber ring 20 to be inserted. When the rubber ring 20 moves forward, it can be inserted into the mating flange 13, thereby achieving further sealing. When gas leaks, the rubber ring 20 will provide an emergency seal.

[0035] In use, when the fixed pin 14 is quickly fixed by rotating the movable flange 12, the cylindrical push rod 216 is slidably connected to the movable flange 12 through the slide groove, and the cylindrical push rod 216 is slidably embedded in the inclined slide groove 213 of the arc plate 212. The rotational force of the movable flange 12 is converted into the axial movement force of the cylindrical push rod 216 along the inclined slide groove 213, pushing the cylindrical push rod 216 to slide smoothly in the inclined slide groove 213. The L-shaped push plate 215, which is fixedly connected to the cylindrical push rod 216, moves synchronously with the cylindrical push rod 216 and extends towards the front end of the fixed flange 11 along the transverse slide groove 214. The small cylinder at the lower end of the L-shaped push plate 215 slides and engages with the outer fixed ring of the rubber ring 20, thereby driving the rubber ring 20 forward. At this point, the rear end ring of the rubber ring 20 slides within the groove on the back of the L-shaped ring rod 152 on the fixed flange 11, ensuring a stable movement trajectory. This allows the rubber ring 20 to be precisely inserted into the pre-set groove on the mating flange 13, tightly filling the gap between the fixed flange 11 and the mating flange 13, thus completing a secondary seal. If a gas leak occurs subsequently, the pressure of the leaking gas will act on the rubber ring 20, causing it to further conform to the gap and form an emergency seal, preventing further leakage.

[0036] Example 3 Reference Figures 2-10 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a warning mechanism for the quick installation and positioning mechanism of the flue gas expansion joint, solving the problem of time-consuming and labor-intensive location of leaks during gas leaks. It includes several energy storage components 31, including a spring telescopic rod 311 fixedly mounted on the outer wall of the inner cavity of the outer expansion ring groove 30. A strip-shaped limiting rod 312 is slidably mounted at the telescopic end of the spring telescopic rod 311. The strip-shaped limiting rod 312 movably penetrates the fixed flange 11. A flagpole 313 is inserted into the end of the strip-shaped limiting rod 312 away from the spring telescopic rod 311, and the flagpole 313 movably penetrates the movable flange. 12. In the inner cavity, a compression spring 314 is elastically provided at the rear end of the flagpole 313. A limiting groove 315 is provided at the front end of the flagpole 313. The limiting groove 315 is inserted into the strip limiting rod 312. A small red flag 316 is provided between the limiting groove 315 and the compression spring 314. The small red flag 316 is used for warning. A square groove 317 is provided at the end of the strip limiting rod 312 away from the limiting groove 315. Two triangular blocks 318 are slidably abutted in the inner cavity of the square groove 317. The two triangular blocks 318 are horizontally fixed on both sides of the telescopic end of the spring telescopic rod 311, and the inclined surfaces of the two triangular blocks 318 are opposite.

[0037] Specifically, the two triangular blocks 318 have their inclined surfaces facing opposite directions. When the spring telescopic rod 311 is compressed, it can push the strip-shaped limiting rod 312 to move away from the flagpole 313, thereby disengaging the strip-shaped limiting rod 312 from the limiting groove 315 and making the flagpole 313 reach its limiting position. Then, under the action of the compression spring 314, it pops out, and the rolled-up small red flag 316 unfolds, making it convenient for staff to quickly position the flagpole. After maintenance, when the flagpole 313 is reinserted, the telescopic end of the spring telescopic rod 311 resets. When the telescopic end of the spring telescopic rod 311 resets, it pushes the strip-shaped limiting rod 312 towards the flagpole 313, thereby inserting the strip-shaped limiting rod 312 into the limiting groove 315 to limit the flagpole 313 again.

[0038] During use, when gas leakage occurs between the fixed flange 11 and the mating flange 13, the leaking gas expands the rubber ring 20, causing it to expand within the outer expansion groove 30 at the upper end of the fixed flange 11. As the rubber ring 20 expands, it acts on the telescopic end of the spring telescopic rod 311 in the energy storage assembly 31, thereby pushing the spring telescopic rod 311 to retract inward. Since two triangular blocks 318 with opposite inclined planes are horizontally fixed on both sides of the telescopic end of the spring telescopic rod 311, and the triangular blocks 318 slide against the inner cavity of the square groove 317 at the end of the strip-shaped limiting rod 312, when the spring telescopic rod 311 is compressed, the inclined plane of the triangular block 318 on the side away from the flagpole 313 will generate a lateral thrust on the strip-shaped limiting rod 312, causing the strip-shaped limiting rod 312 to move horizontally away from the flagpole 313. When the strip-shaped limiting rod 312 completely disengages from the limiting groove 315 at the front end of the flagpole 313, the limiting state of the flagpole 313 is released. At this time, the compression spring 314 elastically set at the rear end of the flagpole 313 releases its stored force, pushing the flagpole 313 to quickly pop out of the movable flange 12. After the flagpole 313 pops out, the small red flag 316, which was originally rolled up between the limiting groove 315 and the compression spring 314, will unfold. Workers can quickly locate the leak by observing the unfolded small red flag 316, solving the problem of time-consuming and labor-intensive search for the leak point. After the leak is repaired, the staff will reinsert the ejected flagpole 313 into the inner cavity of the movable flange 12, push the flagpole 313 backward to compress the compression spring 314, and squeeze the strip-shaped limiting rod 312 laterally. At this time, the strip-shaped limiting rod 312 will push the spring telescopic rod 311 back through the triangular block 318 on one side of the flagpole 313. After the flagpole 313 is inserted, the telescopic end of the spring telescopic rod 311 will reset under its own elasticity. The triangular block 318 on one side of the flagpole 313 will abut against the square groove 317 again and apply a reverse lateral thrust to the strip-shaped limiting rod 312, pushing the strip-shaped limiting rod 312 back into the limiting groove 315 of the flagpole 313, completing the re-limiting of the flagpole 313, so that the warning mechanism returns to its initial standby state for reuse in the next leak.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A quick installation and positioning mechanism for flue gas expansion joints, characterized in that: include, The installation mechanism includes an expansion tube (10), with fixed flanges (11) fixed at both ends of the expansion tube (10). A movable flange (12) is rotatably connected to the back of the fixed flange (11). A docking flange (13) is abutted at the front end of the fixed flange (11). Several fixing pins (14) are inserted between the fixed flange (11) and the docking flange (13) for fixing. A limit assembly (15) is provided between the fixed flange (11) and the movable flange (12). A rotating fixing assembly (16) is provided in the inner cavity of the movable flange (12). The rotating fixing assembly (16) is used to quickly fix the fixing pins (14). The sealing mechanism includes a rubber ring (20) that is slidably disposed on the front end ring surface of the fixed flange (11). A telescopic component (21) is provided on the upper part of the rubber ring (20). The telescopic component (21) is used to push the rubber ring (20) to seal the gap between the fixed flange (11) and the mating flange (13) again. The warning mechanism includes an outer expansion groove (30) located on the upper end of the rubber ring (20) of the fixed flange (11), and a plurality of energy storage components (31) are provided in the outer expansion groove (30). The energy storage components (31) are used to provide warnings when there is a gas leak.

2. The quick installation and positioning mechanism for flue expansion joints according to claim 1, characterized in that: The limiting component (15) includes an L-shaped annular groove (151) formed on the outer ring side of the front surface of the movable flange (12), and an L-shaped ring rod (152) is slidably disposed in the L-shaped annular groove (151). The L-shaped ring rod (152) is fixedly disposed on the outer ring side of the back of the fixed flange (11).

3. The quick installation and positioning mechanism for flue expansion joints according to claim 1, characterized in that: The rotating fixing assembly (16) includes an inner ring groove (161) opened inside the movable flange (12) through which the fixing pin (14) passes. A convex ring (162) is fixedly provided in the middle of the upper and lower ring surfaces of the inner ring groove (161). Several concave grooves (163) are slidably provided on the outer sides of the upper and lower convex rings (162). The concave grooves (163) are opened on the fixing pin (14).

4. The quick installation and positioning mechanism for flue expansion joints according to claim 3, characterized in that: The rotating fixing assembly (16) also includes several arc-shaped guide grooves (164) opened on the rear side wall of the inner ring groove (161). The arc-shaped guide grooves (164) are movably connected through the fixing pins (14), and a fixing pin (165) is inserted into the upper part of one end of the arc-shaped guide groove (164). A slot (166) is inserted into the outside of the fixing pin (165), and the slot (166) is opened in several concave grooves (163).

5. The quick installation and positioning mechanism for a flue expansion joint according to claim 1, characterized in that: The telescopic assembly (21) includes several arc-shaped fixing grooves (211) that pass through the outer ring side of the fixed flange (11). Each of the arc-shaped fixing grooves (211) has an arc-shaped plate (212) fixedly installed in its inner cavity. An inclined sliding groove (213) is provided in the middle of the arc-shaped plate (212). A transverse sliding groove (214) is provided in the middle of the side wall of the inclined sliding groove (213). The inner cavity of the transverse sliding groove (214) is connected to the inner cavity of the inclined sliding groove (213), and the transverse sliding groove (214) passes through the fixed flange (11).

6. The quick installation and positioning mechanism for a flue expansion joint according to claim 5, characterized in that: An L-shaped push plate (215) is slidably disposed in the inner cavity of the transverse slide groove (214), and a cylindrical push rod (216) is fixedly disposed at the rear end of the L-shaped push plate (215). The cylindrical push rod (216) is slidably disposed in the inner cavity of the inclined slide groove (213).

7. The quick installation and positioning mechanism for flue expansion joints according to claim 1, characterized in that: Several of the energy storage components (31) include a spring telescopic rod (311) fixedly installed on the outer wall of the inner cavity of the outer expansion annular groove (30). A strip-shaped limiting rod (312) is slidably installed at the telescopic end of the spring telescopic rod (311). The strip-shaped limiting rod (312) movably passes through the fixed flange (11). A flagpole (313) is inserted at the end of the strip-shaped limiting rod (312) away from the spring telescopic rod (311). The flagpole (313) movably passes through the inner cavity of the movable flange (12).

8. The quick installation and positioning mechanism for a flue expansion joint according to claim 7, characterized in that: The flagpole (313) is elastically provided with a compression spring (314) at its rear end, and a limiting groove (315) is provided at the front end of the flagpole (313), and the limiting groove (315) is inserted into the strip limiting rod (312).

9. The quick installation and positioning mechanism for a flue expansion joint according to claim 8, characterized in that: A small red flag (316) is provided between the limiting groove (315) and the compression spring (314), and the small red flag (316) is used for warning purposes.

10. A quick installation and positioning mechanism for flue gas expansion joints according to claim 9, characterized in that: The strip-shaped limiting rod (312) has a square groove (317) at one end away from the limiting groove (315). Two triangular blocks (318) are slidably abutted in the inner cavity of the square groove (317). The two triangular blocks (318) are respectively horizontally fixed on both sides of the extension end of the spring telescopic rod (311), and the inclined surfaces of the two triangular blocks (318) are opposite.

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