Corrosion resistant composite compensator

Abstract

The utility model discloses a kind of corrosion-resistant composite compensator, including compensator main body and non-metal composite cylinder, compensator main body includes upstream connector, upstream flange, downstream connector, downstream flange, flow guide cylinder, annular upstream vertical plate and annular downstream vertical plate, further include outer shell and metal bellow, outer shell includes inner tube, annular upper connecting plate, outer tube and annular lower connecting plate, inner tube is sleeved on non-metal composite cylinder, one end of inner tube away from downstream connector is sealed with upstream vertical plate using upper connecting plate and is connected, one end of outer tube close to downstream connector is sealed with downstream vertical plate and is connected, metal bellow is sleeved on inner tube, outer tube is sleeved on metal bellow, two ends of metal bellow are sealed with inner tube and outer tube and are connected.The utility model fixes non-metal composite cylinder, fully separates sulfur-containing flue gas and dust in system, sets outer shell and metal bellow, avoids metal bellow contact deposition in bottom corrosive condensate.

Description

Technical Field

[0001] This utility model relates to a corrosion-resistant composite compensator, belonging to the field of petrochemical composite pipelines. Background Technology

[0002] Currently, various types of compensators are used in the petrochemical industry, broadly categorized into non-metallic compensators (such as those disclosed in Chinese invention patent application CN120889973A) and metallic compensators (such as those disclosed in Chinese utility model patent application CN223511734U). Non-metallic compensators offer advantages such as large compensation capacity, low stiffness, and short installation length. However, they suffer from poor sealing and low pressure resistance. Under fluctuating pressure conditions, the composite ring of non-metallic compensators repeatedly bends, leading to fatigue damage and requiring frequent maintenance and replacement. Metallic compensators, on the other hand, offer advantages such as high pressure resistance, excellent sealing, and significantly greater stiffness than non-metallic compensators. However, their compensation capacity is inferior to non-metallic expansion joints, and they are more susceptible to dew point corrosion, especially in liquid-accumulating environments, resulting in insufficient durability. Summary of the Invention

[0003] The purpose of this invention is to provide a corrosion-resistant composite compensator that has good sealing performance, high pressure resistance, strong compensation capability, and good durability.

[0004] To solve the above problems, the technical solution adopted by this utility model is: a corrosion-resistant composite compensator, comprising a compensator body and a non-metallic composite cylinder. The compensator body includes an upstream connector, an upstream flange, a downstream connector, a downstream flange, a guide cylinder, an annular upstream vertical plate, and an annular downstream vertical plate. The upstream flange is fixed to the upstream connector at the end away from the downstream connector. The upstream vertical plate is sleeved on the upstream connector and sealed and fixed to the outer surface of the upstream connector near the upstream flange. The downstream flange is fixed to the downstream connector at the end away from the upstream flange. The downstream vertical plate is fixed to the downstream flange at the end near the upstream connector. The end of the guide cylinder facing the downstream flange is fixedly connected to the downstream vertical plate, and the end of the guide cylinder facing the upstream flange... One end of the non-metallic composite cylinder is fitted onto the upstream pipe with a first gap between them. The two ends of the non-metallic composite cylinder are respectively sealed and connected to the upstream vertical plate and the downstream vertical plate. The cylinder also includes an outer shell and a metal bellows. The outer shell includes an inner cylinder, an annular upper connecting plate, an outer cylinder, and an annular lower connecting plate. The inner cylinder is fitted onto the non-metallic composite cylinder. The end of the inner cylinder away from the downstream pipe is sealed and connected to the upstream vertical plate by the upper connecting plate. The end of the outer cylinder near the downstream pipe is sealed and connected to the downstream vertical plate by the lower connecting plate. The metal bellows is fitted onto the inner cylinder. The end of the outer cylinder away from the downstream pipe is fitted onto the metal bellows. The two ends of the metal bellows are respectively sealed and connected to the end of the inner cylinder near the downstream pipe and the end of the outer cylinder away from the downstream pipe.

[0005] As a further improvement of this utility model, an annular end plate is sealed and fixed on the outer cylinder at the end away from the downstream pipe. The end plate is sleeved on the inner cylinder and a second gap is left between the end plate and the inner cylinder. The end of the metal bellows away from the downstream pipe is sealed and fixed to the end plate.

[0006] As a further improvement of this utility model, a first upper connecting cylinder is fixed on the upstream vertical plate, and a second upper connecting cylinder is fixed on the upper connecting plate. The second upper connecting cylinder is sleeved on the first upper connecting cylinder. The end of the non-metallic composite cylinder away from the downstream pipe is located between the first upper connecting cylinder and the second upper connecting cylinder, and the non-metallic composite cylinder is clamped between the first upper connecting cylinder and the second upper connecting cylinder by an upper fixing member. A first lower connecting cylinder is fixed on the downstream vertical plate, and a second lower connecting cylinder is fixed on the lower connecting plate. The second lower connecting cylinder is sleeved on the first lower connecting cylinder. The end of the non-metallic composite cylinder near the downstream pipe is located between the first lower connecting cylinder and the second lower connecting cylinder, and the non-metallic composite cylinder is clamped between the first lower connecting cylinder and the second lower connecting cylinder by a lower fixing member.

[0007] As a further improvement of this utility model, the upper fixing member includes multiple upper bolts and multiple upper nuts. The multiple upper bolts are evenly arranged along the circumference. The upper bolts pass through the first upper connecting cylinder, the non-metallic composite cylinder, and the second upper connecting cylinder simultaneously. Each upper bolt is provided with an upper nut, and the upper nut is threadedly engaged with the upper bolt. The lower fixing member includes multiple lower bolts and multiple lower nuts. The multiple lower bolts are evenly arranged along the circumference. The lower bolts pass through the first lower connecting cylinder, the non-metallic composite cylinder, and the second lower connecting cylinder simultaneously. Each lower bolt is provided with a lower nut, and the lower nut is threadedly engaged with the lower bolt.

[0008] As a further improvement of this utility model, it also includes a purging line, which includes an air intake pipe and a control valve disposed on the air intake pipe. One end of the air intake pipe is connected to the outer casing, and the other end is used to introduce hot air into the air intake pipe. Opening the control valve is used to introduce hot air into the outer casing, and closing the control valve is used to stop introducing hot air into the outer casing.

[0009] As a further improvement of this utility model, it also includes a condensate drain head, which is disposed on the outer casing and located at the bottom of the outer casing. Opening the condensate drain head is used to discharge hot air and condensed liquid inside the outer casing.

[0010] As a further improvement of this utility model, a pressure gauge is installed on the air intake pipe to detect the air pressure inside the air intake pipe.

[0011] As a further improvement of this utility model, it also includes a filler, which is disposed in the space between the upstream vertical plate, the upstream connecting pipe, the guide cylinder, the downstream vertical plate and the non-metallic composite cylinder.

[0012] As a further improvement of this utility model, the filler material is ceramic fiber cotton.

[0013] In summary, the beneficial effects of this utility model are: 1. This utility model fixes the non-metallic composite cylinder, which fully isolates sulfur-containing flue gas and dust in the system, and sets up an outer shell and a metal bellows to prevent the metal bellows from contacting the corrosive condensate deposited at the bottom.

[0014] 2. This utility model is equipped with a purging device, which creates a certain pressure between the outer shell and the non-metallic composite cylinder. The inflation pressure is greater than that of the system. Due to the supporting effect of the isolation air pressure, the non-metallic composite cylinder can be prevented from being repeatedly bent due to system pressure fluctuations.

[0015] 3. This utility model is equipped with a control valve, which can set an effective purging pressure. When the internal pressure is insufficient, the regulating valve can be opened to perform purging.

[0016] 4. In this utility model, both the outer shell and the non-metallic composite ring are connected by bolts, which provides the convenience of being detachable. Attached Figure Description

[0017] Figure 1 This is a longitudinal sectional view of the present invention.

[0018] The components are as follows: 1. Expansion joint body; 2. Non-metallic composite cylinder; 3. Upstream pipe; 4. Upstream flange; 5. Downstream pipe; 6. Downstream flange; 7. Flow guide cylinder; 8. Upstream vertical plate; 9. Downstream vertical plate; 10. First gap; 11. Outer shell; 12. Metal bellows; 13. Inner cylinder; 14. Upper connecting plate; 15. Outer cylinder; 16. Lower connecting plate; 17. End plate; 18. Second gap; 19. First upper connecting cylinder; 20. Second upper connecting cylinder; 21. First lower connecting cylinder; 22. Second lower connecting cylinder; 23. Upper bolt; 24. Upper nut; 25. Lower bolt; 26. Lower nut; 27. Inlet pipe; 28. Control valve; 29. ​​Drain head; 30. Pressure gauge; 31. Packing; 32. Air line; 33. Pressure gauge root valve. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0020] like Figure 1The corrosion-resistant composite compensator shown is used in scenarios requiring thermal compensation, such as sulfur-containing flue gas pipelines and sulfur-containing waste heat boiler systems. This corrosion-resistant composite compensator includes a compensator body 1 and a non-metallic composite cylinder 2. The compensator body 1 includes an upstream connector 3, an upstream flange 4, a downstream connector 5, a downstream flange 6, a guide cylinder 7, an annular upstream vertical plate 8, and an annular downstream vertical plate 9. The inner and outer diameters of the upstream connector 3 and the downstream connector 5 are equal, and their centerlines coincide. The opposite ends of the upstream connector 3 and the downstream connector 5 do not contact each other but are separated by a distance. The length of the upstream connector 3 is greater than the length of the downstream connector 5. The upstream flange 4 is welded and fixed to the end of the upstream connector 3 away from the downstream connector 5. The inner diameter of the upstream vertical plate 8 is slightly larger than the outer diameter of the upstream connector 3. The upstream vertical plate 8 is fitted onto the upstream connector 3 and sealed and fixed to the outer surface of the upstream connector 3 near the upstream flange 4. The upstream vertical plate 8 and the upstream connecting pipe 3 are fixed by welding to maintain the airtightness of their connection. The downstream flange 6 is welded to the downstream connecting pipe 5 at the end away from the upstream flange 4. The downstream vertical plate 9 is welded to the downstream flange 6 at the end near the upstream connecting pipe 3. The inner diameter of the guide cylinder 7 is larger than the outer diameter of the downstream connecting pipe 5, and the thickness of the guide cylinder 7 is equal to the thickness of the downstream connecting pipe 5. The length of the guide cylinder 7 is equal to or slightly larger than the length of the downstream connecting pipe 5. The end of the guide cylinder 7 facing the downstream flange 6 is welded to the downstream vertical plate 9. That is, in this utility model, the guide cylinder 7 and the downstream connecting pipe 5 are located on opposite sides of the downstream vertical plate 9. The end of the guide cylinder 7 facing the upstream flange 4 is fitted onto the upstream connecting pipe 3 with a first gap 10 between them. The non-metallic composite cylinder 2 can be made of fluoroplastic. The two ends of the non-metallic composite cylinder 2 are sealed to the upstream vertical plate 8 and the downstream vertical plate 9, respectively. The non-metallic composite cylinder 2 in this utility model has the advantages of large compensation, low rigidity, short installation length, strong compensation ability, and good corrosion resistance.

[0021] like Figure 1As shown, this utility model includes an outer shell 11 and a metal bellows 12. The outer shell 11 includes an inner cylinder 13, an annular upper connecting plate 14, an outer cylinder 15, and an annular lower connecting plate 16. The inner diameter of the inner cylinder 13 is larger than the outer diameter of the non-metallic composite cylinder 2. The inner cylinder 13 is fitted onto the non-metallic composite cylinder 2. The end of the inner cylinder 13 away from the downstream pipe 5 is sealed to the upstream vertical plate 8 by the upper connecting plate 14. In this utility model, the upper connecting plate 14 is welded and fixed to the inner cylinder 13 or integrally formed. The inner diameter of the outer cylinder 15 is larger than the outer diameter of the inner cylinder 13. The outer cylinder 15 is close to the lower... One end of the downstream pipe 5 is sealed to the downstream vertical plate 9 by a lower connecting plate 16. The lower connecting plate 16 is welded to the outer cylinder 15 or integrally formed. The outer diameter of the metal bellows 12 is smaller than the inner diameter of the outer cylinder 15, and the inner diameter of the metal bellows 12 is slightly larger than the outer diameter of the inner cylinder 13. The metal bellows 12 is sleeved on the inner cylinder 13. The end of the outer cylinder 15 away from the downstream pipe 5 is sleeved on the metal bellows 12. The two ends of the metal bellows 12 are fixedly connected to the end of the inner cylinder 13 near the downstream pipe 5 and the end of the outer cylinder 15 away from the downstream pipe 5 by welding, respectively. In this utility model, an annular end plate 17 is sealed and fixed on the end of the outer cylinder 15 away from the downstream pipe 5. The inner diameter of the end plate 17 is larger than the outer diameter of the inner cylinder 13. The end plate 17 is sleeved on the inner cylinder 13 and a second gap 18 is left between the end plate 17 and the inner cylinder 13. The end of the metal bellows 12 away from the downstream pipe 5 is welded to the end plate 17. This invention features a metal bellows, which provides advantages such as good pressure resistance, excellent sealing, and high rigidity. It is also less prone to fatigue damage during repeated bending, eliminating the need for frequent maintenance and replacement. The non-metallic composite cylinder 2 in this invention isolates the metal bellows 12 from the high-temperature sulfur-containing flue gas, preventing corrosion and promoting stable long-term operation.

[0022] like Figure 1As shown, in this invention, a first upper connecting cylinder 19 is welded and fixed to the upstream vertical plate 8 on the side away from the downstream vertical plate 9, and a second upper connecting cylinder 20 is welded and fixed to the upper connecting plate 14 on the side away from the downstream vertical plate 9. The inner diameter of the second upper connecting cylinder 20 is larger than the outer diameter of the first upper connecting cylinder 19 and it is sleeved on the first upper connecting cylinder 19. The end of the non-metallic composite cylinder 2 away from the downstream connecting pipe 5 is located between the first upper connecting cylinder 19 and the second upper connecting cylinder 20. The non-metallic composite cylinder 2 is clamped between the first upper connecting cylinder 19 and the second upper connecting cylinder 20 by the upper fixing member, thereby achieving a tight seal at one end of the non-metallic composite cylinder 2. For sealing and fixing, a first lower connecting cylinder 21 is welded and fixed on the side of the downstream vertical plate 9 near the downstream vertical plate 9, and a second lower connecting cylinder 22 is welded and fixed on the side of the lower connecting plate 16 near the downstream vertical plate 9. The inner diameter of the second lower connecting cylinder 22 is larger than the outer diameter of the first lower connecting cylinder 21 and is sleeved on the first lower connecting cylinder 21. The end of the non-metallic composite cylinder 2 near the downstream pipe 5 is located between the first lower connecting cylinder 21 and the second lower connecting cylinder 22. The non-metallic composite cylinder 2 is clamped between the first lower connecting cylinder 21 and the second lower connecting cylinder 22 by the lower fixing member, so as to achieve sealing and fixing of the other end of the non-metallic composite cylinder 2.

[0023] like Figure 1 As shown, the upper fixing component of this utility model includes multiple upper bolts 23 and multiple upper nuts 24. The multiple upper bolts 23 are evenly distributed along the circumference of the upstream pipe 4. The upper bolts 23 pass through the first upper connecting cylinder 19, the non-metallic composite cylinder 2, and the second upper connecting cylinder 20. Each upper bolt 23 is provided with an upper nut 24. The upper nut 24 is threadedly engaged with the upper bolt 23, pressing the first upper connecting cylinder 19 and the second upper connecting cylinder 20, and pressing one end of the non-metallic composite cylinder 2 between the first upper connecting cylinder 19 and the second upper connecting cylinder 20. The lower fixing component of this utility model includes multiple lower bolts 25 and multiple lower nuts 26. The multiple lower bolts 25 are evenly distributed along the circumference of the downstream pipe 5. The lower bolts 25 pass through the first lower connecting cylinder 21, the non-metallic composite cylinder 2 and the second lower connecting cylinder 22. Each lower bolt 25 is provided with a lower nut 26. The lower nut 26 is threadedly engaged with the lower bolt 25 to press the first lower connecting cylinder 21 and the second lower connecting cylinder 22, and press the other end of the non-metallic composite cylinder 2 between the first lower connecting cylinder 21 and the second lower connecting cylinder 22.

[0024] like Figure 1As shown, this utility model is equipped with a purge line, which includes an air intake pipe 27 and a control valve 28 disposed on the air intake pipe 27. One end of the air intake pipe 27 is connected to the outer casing 11. In this utility model, the air intake pipe 27 is preferably connected to the lower connecting plate 16 of the outer casing 11. The other end of the air intake pipe 27 is used to introduce hot air into the air intake pipe 27. For example, the air intake pipe 27 is connected to the air line 32, and hot air is introduced into the air intake pipe 27 from the air line 32. Opening the control valve 28 can introduce hot air into the outer casing 11, while closing the control valve 28 can stop the introduction of hot air into the outer casing 11. Introducing hot air into the outer casing 11 can maintain the air pressure inside the outer casing 11. This invention features a condensate drain head 29, which is mounted on the outer casing 11 and located at its bottom. The condensate drain head 29 is optimally connected to the bottom of the outer cylinder 15 of the outer casing 11. Opening the condensate drain head 29 allows for the discharge of hot air from the outer casing 11 when the internal air pressure is high, and also allows for the timely discharge of condensed liquid from the outer casing 11. The condensate drain head 29 consists of a drain pipe communicating with the interior of the outer cylinder 15 and a valve mounted on the drain pipe. Opening or closing the valve opens or closes the condensate drain head 29. This invention also includes a pressure gauge 30 on the air inlet pipe 27, and a pressure gauge root valve 33 at the connection between the pressure gauge 30 and the air inlet pipe 27. Opening the pressure gauge root valve 33 allows for the detection of air pressure within the air inlet pipe 27, while simultaneously closing the control valve 28 and opening the pressure gauge root valve 33 allows for the detection of air pressure within the outer casing 11.

[0025] like Figure 1 As shown, this utility model is provided with a filler 31, which is disposed in the space between the upstream vertical plate 8, the upstream pipe 3, the guide cylinder 7, the downstream vertical plate 9 and the non-metallic composite cylinder 2. The best material for the filler 31 in this utility model is ceramic fiber cotton.

[0026] Unless otherwise specified in the above description, all parts are existing technology or can be implemented using existing technology. Furthermore, the specific embodiments described in this utility model are merely preferred embodiments of the invention and are not intended to limit the scope of this utility model. That is, all equivalent changes and modifications made within the scope of this utility model patent should be considered within the technical scope of this utility model.

Claims

1. A corrosion-resistant composite compensator, comprising a compensator body and a non-metallic composite cylinder, the compensator body comprising an upstream connector, an upstream flange, a downstream connector, a downstream flange, a guide cylinder, an annular upstream vertical plate, and an annular downstream vertical plate, the upstream flange being fixed to the upstream connector at the end away from the downstream connector, the upstream vertical plate being sleeved on the upstream connector and sealed and fixed to the outer surface of the upstream connector near the upstream flange, the downstream flange being fixed to the downstream connector at the end away from the upstream flange, the downstream vertical plate being fixed to the downstream flange at the end near the upstream connector, the guide cylinder at the end facing the downstream flange being fixedly connected to the downstream vertical plate, the guide cylinder at the end facing the upstream flange being sleeved on the upstream connector with a first gap between them, and the two ends of the non-metallic composite cylinder being sealed and connected to the upstream vertical plate and the downstream vertical plate respectively, characterized in that, It also includes an outer shell and a metal bellows. The outer shell includes an inner cylinder, an annular upper connecting plate, an outer cylinder, and an annular lower connecting plate. The inner cylinder is fitted onto a non-metallic composite cylinder. The end of the inner cylinder away from the downstream pipe is sealed to the upstream vertical plate by the upper connecting plate. The end of the outer cylinder near the downstream pipe is sealed to the downstream vertical plate by the lower connecting plate. The metal bellows is fitted onto the inner cylinder. The end of the outer cylinder away from the downstream pipe is fitted onto the metal bellows. The two ends of the metal bellows are sealed to the end of the inner cylinder near the downstream pipe and the end of the outer cylinder away from the downstream pipe, respectively.

2. The corrosion-resistant composite compensator according to claim 1, characterized in that, An annular end plate is sealed and fixed at the end of the outer cylinder away from the downstream connector. The end plate is fitted onto the inner cylinder and a second gap is left between the end plate and the inner cylinder. The end of the metal bellows away from the downstream connector is sealed and fixed to the end plate.

3. The corrosion-resistant composite compensator according to claim 1, characterized in that, A first upper connecting cylinder is fixed on the upstream vertical plate, and a second upper connecting cylinder is fixed on the upper connecting plate. The second upper connecting cylinder is sleeved on the first upper connecting cylinder. The end of the non-metallic composite cylinder away from the downstream pipe is located between the first upper connecting cylinder and the second upper connecting cylinder, and the non-metallic composite cylinder is clamped between the first upper connecting cylinder and the second upper connecting cylinder by the upper fixing member. A first lower connecting cylinder is fixed on the downstream vertical plate, and a second lower connecting cylinder is fixed on the lower connecting plate. The second lower connecting cylinder is sleeved on the first lower connecting cylinder. The end of the non-metallic composite cylinder near the downstream pipe is located between the first lower connecting cylinder and the second lower connecting cylinder, and the non-metallic composite cylinder is clamped between the first lower connecting cylinder and the second lower connecting cylinder by the lower fixing member.

4. The corrosion-resistant composite compensator according to claim 3, characterized in that, The upper fixing component includes multiple upper bolts and multiple upper nuts. The multiple upper bolts are evenly arranged along the circumference. The upper bolts pass through the first upper connecting cylinder, the non-metallic composite cylinder and the second upper connecting cylinder at the same time. Each upper bolt is provided with an upper nut, and the upper nut is threadedly engaged with the upper bolt. The lower fixing component includes multiple lower bolts and multiple lower nuts. The multiple lower bolts are evenly arranged along the circumference. The lower bolts pass through the first lower connecting cylinder, the non-metallic composite cylinder and the second lower connecting cylinder at the same time. Each lower bolt is provided with a lower nut, and the lower nut is threadedly engaged with the lower bolt.

5. The corrosion-resistant composite compensator according to claim 1, characterized in that, It also includes a purge line, which includes an intake pipe and a control valve installed on the intake pipe. One end of the intake pipe is connected to the outer casing, and the other end is used to introduce hot air into the intake pipe. Opening the control valve is used to introduce hot air into the outer casing, and closing the control valve is used to stop the introduction of hot air into the outer casing.

6. The corrosion-resistant composite compensator according to claim 5, characterized in that, It also includes a condensate drain head, which is installed on the outer casing and located at the bottom of the outer casing. Opening the condensate drain head is used to drain the hot air and condensed liquid inside the outer casing.

7. The corrosion-resistant composite compensator according to claim 5, characterized in that, A pressure gauge is installed on the intake pipe to detect the air pressure inside the intake pipe.

8. The corrosion-resistant composite compensator according to claim 1, characterized in that, It also includes packing material, which is disposed in the space between the upstream vertical plate, the upstream connecting pipe, the guide tube, the downstream vertical plate, and the non-metallic composite cylinder.

9. The corrosion-resistant composite compensator according to claim 8, characterized in that, The filler material is ceramic fiber cotton.

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