A gas riser sleeve joint anti-corrosion protection structure

Abstract

The utility model discloses a kind of gas riser sleeve thread interface anticorrosion protection structure, specifically related to gas riser anticorrosion protection technical field, including two arc plates of rotation connection, one end of two arc plates is fixedly connected with fixed side plate, and fixed bolt is inserted in the middle part of fixed side plate.The utility model first by two arc plates are opened and are sleeved on gas riser sleeve thread interface, and arc plate is preliminarily fixed by fixed bolt and fixed side plate, then by first air inlet pipe and second air inlet pipe, gas is injected into first air bag pipe and second air bag pipe inside, so that first air bag pipe and second air bag pipe, air bag strip inflation and pipeline wall body closely adhere, and combined sealing cloth strip can realize the all-around sealing of gas riser sleeve thread interface, effectively isolate external corrosive medium, and it is convenient to adapt different pipe diameter gas riser use, more suitable, it can be widely applied to a variety of gas pipeline scene.

Description

Technical Field

[0001] This utility model relates to the field of gas riser corrosion protection technology, and more specifically, to a gas riser threaded interface corrosion protection structure. Background Technology

[0002] In a gas transmission system, the gas riser is a key component connecting the gas supply to different floors. The stability and safety of its threaded interface directly affect the operation of the entire gas system. However, due to its special structure, the threaded interface has many gaps and uneven surfaces, making it a vulnerable point for corrosion. In a humid environment, moisture and corrosive gases (such as sulfur dioxide and hydrogen sulfide) in the air can easily accumulate at the interface gaps, forming an electrochemical corrosion environment that causes the metal interface to rust and corrode, thereby weakening the interface strength. Common anti-corrosion measures for gas riser threaded joints mainly include applying anti-corrosion coatings, wrapping with anti-corrosion tape, and installing anti-corrosion protective sleeves. While applying anti-corrosion coatings can isolate the joint from corrosive media to a certain extent, the coating is difficult to cover evenly in the thread gaps, and it is prone to cracking and peeling after long-term use, greatly reducing the anti-corrosion effect. Wrapping with anti-corrosion tape is simple to operate, but the tape has limited adhesion to the joint and cannot tightly fill the thread gaps, allowing external corrosive media to still penetrate. Existing anti-corrosion protective sleeves are mostly fixed structures, which are difficult to adapt to threaded interfaces of different pipe diameters and cannot provide dynamic protection based on the actual corrosion conditions of the interface. Therefore, the protective effect and adaptability are poor. Therefore, an anti-corrosion protection structure for gas riser threaded interfaces is proposed. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, this utility model provides a corrosion-resistant protection structure for the threaded interface of a gas riser, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant protection structure for a gas riser threaded interface, comprising two rotatably connected arc-shaped plates, one end of each of the two arc-shaped plates being fixedly connected to a fixed side plate, and a fixing bolt inserted in the middle of the fixed side plate. By tightening the fixing bolt, the two arc-shaped plates can be tightly fixed to the outside of the threaded interface to form an initial protective shell. A sealing strip is provided on the inner side of the connection between the two arc-shaped plates. The sealing strip can fill the gap at the rotatable connection between the two arc-shaped plates, preventing external corrosive media from entering and enhancing the overall sealing performance. A first airbag tube and a second airbag tube are provided at both ends of the inner side of each arc-shaped plate. Both ends of the arc-shaped plate are provided with connecting pipes, and a valve is provided in the middle of the connecting pipe. The two ends of the arc-shaped plate are provided with a first air inlet pipe and a second air inlet pipe at positions corresponding to the first airbag pipe and the second airbag pipe. A pressure gauge is provided at the bottom of the first air inlet pipe and the second air inlet pipe. Air is inflated into the airbag pipe through the first air inlet pipe and the second airbag pipe. After the first airbag pipe and the second airbag pipe expand, they tightly wrap around both ends of the gas riser pipe to seal the connection between the two ends, effectively isolating the external corrosive media. The pressure gauge can monitor the air pressure in the airbag pipe in real time, which allows the operator to adjust the inflation amount according to the actual situation and ensure the sealing effect. Both the first and second air intake pipes are equipped with a sealing air intake mechanism in the middle. One of the fixed side plates is equipped with an airbag strip. By expanding the airbag strip, the connection between the two fixed side plates can be sealed, thereby sealing the cavity formed by the two arc-shaped plates and effectively isolating external corrosive media. The sealing air intake mechanism can also seal the air intake and prevent gas leakage from the airbag tube.

[0005] Preferably, the inner cavity of the first airbag tube is connected to the inner cavity of the airbag strip, the first airbag tube and the second airbag tube are connected through a connecting pipe, and the inner walls of the first airbag tube and the second airbag tube are provided with sealing gaskets. The connecting pipe can connect the inner cavities of the first airbag tube, the second airbag tube and the airbag strip, and the sealing gaskets can improve the sealing strength of the compression when the first airbag tube and the second airbag tube compress the pipeline.

[0006] Preferably, the inner cavity of the first air inlet pipe is connected to the inner cavity of the first airbag tube, and the inner cavity of the second air inlet pipe is connected to the inner cavity of the second airbag tube. The pressure measuring ends of the plurality of pressure gauges are located in the inner cavities of the first airbag tube and the second airbag tube. Gas can be injected into the first airbag tube and the second airbag tube through the first air inlet pipe and the pressure gauges can monitor the air pressure intensity inside the first airbag tube and the second airbag tube in real time, so that the operator can adjust the inflation volume according to the actual situation and ensure the sealing effect.

[0007] Preferably, a first gas pipe and a second gas pipe are provided between the two arc-shaped plates. A fixing ring is fixedly sleeved on the outside of the end of the first gas pipe near the second gas pipe. A threaded connection cover is sleeved on the outside of the fixing ring. A second sealing ring is provided on one side of the fixing ring.

[0008] Preferably, one end of the second gas pipe is fitted with the fixing ring, the second sealing ring is fitted with the wall of one end of the second gas pipe, and one end of the threaded connection cover is threaded to the external end of one end of the second gas pipe. By tightening the threaded connection cover, the first gas pipe and the second gas pipe can be tightly connected. At the same time, the second sealing ring enhances the sealing of the connection and prevents gas leakage. Together with the external anti-corrosion protection structure, it ensures the safe operation of the gas riser threaded interface.

[0009] Preferably, the air intake blocking mechanism includes a mounting post disposed in the middle of the first air intake pipe and the second air intake pipe. A limiting ring is provided on one side of the mounting post, and a first sealing ring is embedded on the side of the limiting ring near the mounting post. Multiple limiting rings are fixed in the middle of the corresponding first air intake pipe and the second air intake pipe. The mounting post is provided with symmetrical slots on both sides of the end near the limiting plate.

[0010] Preferably, the plurality of mounting posts are threadedly connected to the inner wall of the corresponding first and second air inlets. A rod is inserted into the middle of each mounting post, and a sealing cone is fixedly connected to one end of the rod. A sealing groove is formed at the end of the mounting post near the sealing cone, and a sealing gasket is provided between the end wall of the sealing cone and the sealing groove. A limiting plate is fixedly connected to the end of the rod away from the sealing cone, and a spring is provided on the side of the limiting plate near the mounting post. The sealing cone at one end of the rod cooperates with the sealing groove. Under the action of the spring, the air inlet can be automatically sealed. When it is necessary to inflate the airbag tube, pressing the limiting plate overcomes the spring force, causing the sealing cone to disengage from the sealing groove, allowing gas to smoothly enter the airbag tube. After inflation, releasing the limiting plate causes the spring to push the rod back to its original position, and the sealing cone re-inserts into the sealing groove, achieving a seal at the air inlet and preventing gas leakage from the airbag tube. The mounting post can be rotated, removed, and installed via a slot. When the mounting post presses against the first sealing ring, the sealing strength after installation can be improved.

[0011] The technical effects and advantages of this utility model are as follows: 1. This utility model first opens two arc-shaped plates around the rotating connection and fits them onto the threaded interface of the gas riser. The arc-shaped plates are then initially fixed with fixing bolts and fixing side plates. Gas is then injected into the first and second airbag tubes through the first and second air inlet pipes, causing the first and second airbag tubes and the airbag strip to expand and fit tightly against the pipe wall. Combined with the sealing strip, it can achieve a full-range seal at the threaded interface of the gas riser, effectively isolating external corrosive media. Furthermore, the expansion size of the first and second airbag tubes can be adapted to gas risers of different diameters, making it more versatile and widely applicable to various gas pipeline scenarios. 2. This utility model also ensures good sealing of the airbag tube after inflation by setting a sealing air intake mechanism, preventing gas leakage and maintaining sealing pressure, thereby significantly improving the corrosion resistance of the interface. The opening and closing of the connecting pipe by the valve can adjust the internal air pressure of the first and second airbag tubes separately according to the position and diameter of the connected pipe, which is convenient for simultaneous inflation and individual inflation, improving the flexibility of use. Moreover, the opening and closing of the two arc plates makes the anti-corrosion protection structure easy to install and convenient for later maintenance and repair. The threaded connection of the threaded cover squeezes the second sealing ring, which can improve the connection sealing of the pipeline.

[0012] In summary, through the interaction of the above-mentioned multiple functions, a comprehensive seal can be achieved at the threaded interface of the gas riser, effectively isolating it from external corrosive media. It is also easy to adapt to gas risers of different diameters, making it more versatile and widely applicable to various gas pipeline scenarios. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the structure of this utility model from another angle.

[0015] Figure 3 This is a schematic diagram of the open state of the arc-shaped plate of this utility model.

[0016] Figure 4 This is a schematic diagram of the connection cross-section of the first and second gas pipes when the arc plate of this utility model is in the open state.

[0017] Figure 5 This is a schematic diagram showing the disassembled structure of the mounting column and the first air intake pipe of this utility model.

[0018] Figure 6 This is a schematic diagram of the cross-sectional structure connecting the mounting column and the first air intake pipe of this utility model.

[0019] The attached diagram is labeled as follows: 1. Arc-shaped plate; 2. Fixed side plate; 3. First airbag tube; 4. Second airbag tube; 5. Connecting pipe; 6. Valve; 7. First air inlet pipe; 8. Second air inlet pipe; 9. Pressure gauge; 10. Mounting column; 11. Limiting ring; 12. First sealing ring; 13. Sealing groove; 14. Insert rod; 15. Sealing cone; 16. Limiting plate; 17. Spring; 18. Slot; 19. Airbag strip; 20. Fixing bolt; 21. Sealing cloth strip; 22. First gas pipe; 23. Second gas pipe; 24. Fixing ring; 25. Threaded connection cover; 26. Second sealing ring. Detailed Implementation

[0020] 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.

[0021] As attached Figure 1-6 The diagram shows a corrosion protection structure for a gas riser threaded interface, comprising two rotatably connected arc-shaped plates 1. One end of each arc-shaped plate 1 is fixedly connected to a fixed side plate 2. A fixing bolt 20 is inserted in the middle of the fixed side plate 2. By tightening the fixing bolt 20, the two arc-shaped plates 1 can be tightly fixed to the outside of the threaded interface to form an initial protective shell. A sealing strip 21 is provided on the inner side of the connection between the two arc-shaped plates 1. The sealing strip 21 can fill the gap at the rotatable connection between the two arc-shaped plates 1, prevent external corrosive media from entering, and enhance the overall sealing performance. A first airbag tube 3 and a second airbag tube 4 are provided at both ends of the inner side of the arc-shaped plates 1. Both ends of the arc-shaped plate 1 are provided with connecting pipes 5, and valves 6 are provided in the middle of the connecting pipes 5. The two ends of the arc-shaped plate 1 are provided with first air inlet pipes 7 and second air inlet pipes 8 at positions corresponding to the first airbag tube 3 and the second airbag tube 4. Pressure gauges 9 are provided at the bottom of the first air inlet pipes 7 and the second air inlet pipes 8. Air is inflated into the airbag tubes through the first air inlet pipes 7 and the second air inlet pipes 8. After the first airbag tubes 3 and the second airbag tubes 4 expand, they tightly wrap around the two ends of the gas riser to seal the connection between the two ends, effectively isolating the external corrosive media. The pressure gauges 9 can monitor the air pressure in the airbag tubes in real time, which makes it easy for operators to adjust the inflation amount according to the actual situation and ensure the sealing effect. Both the first air intake pipe 7 and the second air intake pipe 8 are equipped with a sealing air intake mechanism in the middle. One of the fixed side plates 2 is equipped with an airbag strip 19. The airbag strip 19 can be expanded to seal the connection between the two fixed side plates 2, thereby sealing the cavity formed by the two arc-shaped plates 1, effectively isolating external corrosive media. The sealing air intake mechanism can also seal the air intake port to prevent gas leakage from the airbag tube.

[0022] As attached Figure 1-4As shown, the inner cavity of the first airbag tube 3 is connected to the inner cavity of the airbag strip 19. The first airbag tube 3 and the second airbag tube 4 are connected through a connecting pipe 5. Sealing gaskets are provided on the inner walls of the first airbag tube 3 and the second airbag tube 4. The inner cavity of the first air inlet pipe 7 is connected to the inner cavity of the first airbag tube 3. The inner cavity of the second air inlet pipe 8 is connected to the inner cavity of the second airbag tube 4. The measuring ends of multiple pressure gauges 9 are located in the inner cavities of the first airbag tube 3 and the second airbag tube 4. The connecting pipe 5 can connect the inner cavities of the first airbag tube 3, the second airbag tube 4, and the airbag strip 19. The sealing gaskets can improve the sealing strength when the first airbag tube 3 and the second airbag tube 4 squeeze the pipe. The first air inlet pipe 7 and the second air inlet pipe 8 can conveniently inject gas into the first airbag tube 3 and the second airbag tube 4. The pressure gauges 9 can monitor the internal air pressure of the first airbag tube 3 and the second airbag tube 4 in real time, which allows the operator to adjust the inflation volume according to the actual situation and ensure the sealing effect.

[0023] As attached Figure 3 , 4 As shown, a first gas pipe 22 and a second gas pipe 23 are arranged between two arc-shaped plates 1. A fixing ring 24 is fixedly sleeved on the outside of the first gas pipe 22 near the second gas pipe 23. A threaded connection cover 25 is sleeved on the outside of the fixing ring 24. A second sealing ring 26 is arranged on one side of the fixing ring 24. One end of the second gas pipe 23 is in contact with the fixing ring 24. The second sealing ring 26 is in contact with the wall of one end of the second gas pipe 23. One end of the threaded connection cover 25 is threadedly connected to the outside of one end of the second gas pipe 23. By tightening the threaded connection cover 25, the first gas pipe 22 and the second gas pipe 23 can be tightly connected. At the same time, the second sealing ring 26 enhances the sealing of the connection and prevents gas leakage. Together with the external anti-corrosion protection structure, it ensures the safe operation of the gas riser threaded interface.

[0024] As attached Figure 5 , 6As shown, the air intake blocking mechanism includes a mounting post 10 disposed in the middle of the first air intake pipe 7 and the second air intake pipe 8. A limit ring 11 is provided on one side of the mounting post 10, and a first sealing ring 12 is embedded in the side of the limit ring 11 near the mounting post 10. Multiple limit rings 11 are fixed in the middle of the corresponding first air intake pipe 7 and the second air intake pipe 8. The mounting post 10 has symmetrical slots 18 on both sides of the end near the limit plate 16. Multiple mounting posts 10 are threaded to the inner wall of the corresponding first air intake pipe 7 and the second air intake pipe 8. An insert rod 14 is inserted in the middle of the mounting post 10. A sealing cone 15 is fixedly connected to one end of the insert rod 14. A sealing groove 13 is provided at the end of the mounting post 10 near the sealing cone 15. A sealing gasket is provided between the end wall of the sealing cone 15 and the sealing groove 13. 4. A limiting plate 16 is fixedly connected to the end away from the sealing cone 15. A spring 17 is provided on the side of the limiting plate 16 near the mounting post 10. The sealing cone 15 at one end of the insertion rod 14 cooperates with the sealing groove 13. Under the action of the spring 17, the air inlet can be automatically blocked. When it is necessary to inflate the airbag tube, press the limiting plate 16 to overcome the elastic force of the spring 17, so that the sealing cone 15 is disengaged from the sealing groove 13, and the gas can smoothly enter the airbag tube. After inflation, release the limiting plate 16, the spring 17 pushes the insertion rod 14 to reset, and the sealing cone 15 is reinserted into the sealing groove 13 to achieve the sealing of the air inlet and prevent gas leakage in the airbag tube. The mounting post 10 can be rotated, removed, and installed through the slot 18. When the mounting post 10 squeezes the first sealing ring 12, the sealing strength after installation can be improved.

[0025] The working principle of this utility model is as follows: When in use, open the two arc-shaped plates 1 around the rotating connection and put them on the threaded interface of the gas riser so that the inner side of the arc-shaped plate 1 fits the interface surface. Align the fixed side plate 2, insert the fixing bolt 20, and tighten it with a wrench to initially fix the arc-shaped plate 1. Then, gas is injected into the first airbag tube 3 and the second airbag tube 4 through the first air inlet pipe 7 and the second air inlet pipe 8, and the internal air pressure is observed through the pressure gauge 9 until the first airbag tube 3, the second airbag tube 4, and the airbag strip 19 expand and fit tightly against the pipe wall, which can achieve a full-range seal at the threaded interface of the gas riser and effectively isolate external corrosive media. By using the air-blocking mechanism, the sealing cone 15 can be pushed by the internal air pressure, and the limiting plate 16 can be pushed by the spring 17, which can seal the middle of the first air intake pipe 7 and the second air intake pipe 8, ensuring good sealing after the airbag tube is inflated, preventing gas leakage, maintaining sealing pressure, and thus significantly improving the corrosion resistance of the interface. At the same time, when connecting the first gas pipe 22 and the second gas pipe 23, make one end of the second gas pipe 23 fit with the fixing ring 24, tighten the threaded connection cover 25 to squeeze the second sealing ring 26, complete the gas pipe connection, and improve the sealing performance of the connection.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corrosion-resistant protection structure for a gas riser threaded interface, comprising two rotatably connected arc-shaped plates (1), characterized in that: One end of each of the two arc-shaped plates (1) is fixedly connected to a fixed side plate (2), and a fixing bolt (20) is inserted in the middle of the fixed side plate (2). A sealing cloth strip (21) is provided on the inner side of the connection between the two arc-shaped plates (1), and a first airbag tube (3) and a second airbag tube (4) are provided on both ends of the inner side of the arc-shaped plates (1). Both ends of the arc plate (1) are provided with connecting pipes (5), and a valve (6) is provided in the middle of the connecting pipe (5). Both ends of the arc plate (1) are provided with a first air inlet pipe (7) and a second air inlet pipe (8) at positions corresponding to the first airbag pipe (3) and the second airbag pipe (4). A pressure gauge (9) is provided at the bottom of both the first air inlet pipe (7) and the second air inlet pipe (8). The first air intake pipe (7) and the second air intake pipe (8) are both provided with a blocking air intake mechanism in the middle, and one of the fixed side plates (2) is provided with an airbag strip (19) on one side.

2. The anti-corrosion protection structure for the threaded interface of a gas riser according to claim 1, characterized in that: The inner cavity of the first airbag tube (3) is connected to the inner cavity of the airbag strip (19). The first airbag tube (3) and the second airbag tube (4) are connected through a connecting tube (5). The inner walls of the first airbag tube (3) and the second airbag tube (4) are provided with sealing gaskets.

3. The anti-corrosion protection structure for the threaded interface of a gas riser according to claim 1, characterized in that: The inner cavity of the first air inlet pipe (7) is connected to the inner cavity of the first airbag tube (3), the inner cavity of the second air inlet pipe (8) is connected to the inner cavity of the second airbag tube (4), and the pressure measuring ends of the plurality of pressure gauges (9) are located in the inner cavities of the first airbag tube (3) and the second airbag tube (4).

4. The anti-corrosion protection structure for the threaded interface of a gas riser according to claim 1, characterized in that: A first gas pipe (22) and a second gas pipe (23) are provided between the two arc plates (1). A fixing ring (24) is fixedly sleeved on the outside of the first gas pipe (22) near the second gas pipe (23). A threaded connection cover (25) is sleeved on the outside of the fixing ring (24). A second sealing ring (26) is provided on one side of the fixing ring (24).

5. The anti-corrosion protection structure for the threaded interface of a gas riser according to claim 4, characterized in that: One end of the second gas pipe (23) is fitted with the fixing ring (24), the second sealing ring (26) is fitted with the wall of one end of the second gas pipe (23), and one end of the threaded connection cover (25) is externally threaded to one end of the second gas pipe (23).

6. The anti-corrosion protection structure for the threaded interface of a gas riser according to claim 1, characterized in that: The air intake blocking mechanism includes a mounting post (10) disposed in the middle of the first air intake pipe (7) and the second air intake pipe (8). A limiting ring (11) is provided on one side of the mounting post (10). A first sealing ring (12) is embedded on the side of the limiting ring (11) near the mounting post (10). Multiple limiting rings (11) are fixed in the middle of the corresponding first air intake pipe (7) and the second air intake pipe (8). The mounting post (10) is provided with symmetrical slots (18) on both sides of one end near the limiting plate (16).

7. The anti-corrosion protection structure for the threaded interface of a gas riser according to claim 6, characterized in that: Multiple mounting posts (10) are threaded to the inner walls of the corresponding first air intake pipe (7) and second air intake pipe (8). A rod (14) is inserted into the middle of the mounting post (10). A sealing cone (15) is fixedly connected to one end of the rod (14). A sealing groove (13) is opened at the end of the mounting post (10) near the sealing cone (15). A sealing gasket is provided between the end wall of the sealing cone (15) and the sealing groove (13). A limiting plate (16) is fixedly connected to the end of the rod (14) away from the sealing cone (15). A spring (17) is provided on the side of the limiting plate (16) near the mounting post (10).

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