Leak-proof sealing device for liquid ammonia delivery pipeline

Abstract

This utility model belongs to the field of pipeline sealing technology, specifically a leak-proof sealing device for liquid ammonia transportation pipelines. It includes a bellows, with ammonia guide pipes installed on both sides of the bellows. A sealing mechanism is installed between the bellows and the ammonia guide pipes. Limiting flanges are integrally installed on both sides of the bellows. The sealing mechanism includes two sets of sealing sleeves, each containing a sealing ring. A compression component is installed within each sealing sleeve. The two sets of sealing sleeves restrict the sealing rings, sealing the gap between the limiting flange and the mating flange, thus improving the sealing effect. Simultaneously, the compression component presses the limiting flange and the mating flange together, improving the sealing performance between the bellows and the ammonia guide pipes. Multiple sealing components significantly improve the sealing performance between pipelines, and the integrated structure of the bellows also enhances the sealing reliability of the pipeline connection.

Description

Technical Field

[0001] This utility model relates to the field of pipeline sealing technology, specifically a leak-proof sealing device for liquid ammonia transportation pipelines. Background Technology

[0002] Liquid ammonia, as an important chemical raw material, is widely used in various industries such as chemical, refrigeration, and fertilizer. To achieve efficient and convenient transportation and storage, gaseous ammonia is usually converted into liquid ammonia through pressurization or cooling, and then transported over long distances via pipelines.

[0003] In liquid ammonia transportation pipeline systems, pipelines are usually connected by flanges or other means. These connections are high-risk areas for leakage. When faced with displacement caused by pipeline changes due to temperature variations, mechanical vibrations, etc., ordinary sealing devices lack effective compensation capabilities, further increasing the possibility of leakage. To improve the sealing performance of pipeline connections, we propose a leak-proof sealing device for liquid ammonia transportation pipelines. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a leak-proof sealing device for liquid ammonia transportation pipelines. A sealing mechanism is installed between the bellows and the ammonia delivery pipe. This mechanism includes two sets of sealing sleeves, each containing a sealing ring. The sealing ring seals the gap between the limiting flange and the mating flange, thereby improving the sealing effect. Simultaneously, a compression component presses the limiting flange and the mating flange together, further enhancing the sealing performance between the bellows and the ammonia delivery pipe. Furthermore, the first and second sealing gaskets between the limiting flange and the mating flange also improve the sealing performance. By designing multiple sealing components, the sealing performance between the pipelines is significantly improved. The integrated structure of the bellows also enhances the sealing reliability of the pipeline connection, thus solving the problems mentioned earlier.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A leak-proof sealing device for a liquid ammonia transport pipeline includes a bellows, with ammonia guide pipes installed on both sides of the bellows. A sealing mechanism is installed between the bellows and the ammonia guide pipes. Limiting flanges are integrally installed on both sides of the bellows. A mating flange is integrally installed on the side of the ammonia guide pipe closest to the bellows. The mating flange and the corresponding limiting flange are fixedly connected by a plurality of first bolts and first nuts. The sealing mechanism includes two sets of sealing sleeves, with sealing rings installed inside the two sets of sealing sleeves. The sealing rings are fitted between the limiting flanges and the mating flanges. A compression assembly is installed inside the sealing sleeves.

[0007] Preferably, a connecting flange is integrally installed on the sealing sleeve, and two sets of connecting flanges are fixedly connected by a number of second bolts and a number of second nuts. An installation groove is opened in the sealing sleeve, and an installation ring is fixedly installed on both the mating flange and the limiting flange. The installation groove mates with the corresponding installation ring.

[0008] Preferably, the extrusion assembly includes an extrusion plate, on which a plurality of first protrusions are fixedly installed. The first protrusions are slidably connected to a sealing sleeve. A second protrusion is fixedly installed on one side of the first protrusion. A plurality of hollow columns are fixedly installed on the sealing sleeve. The second protrusions are slidably connected to the corresponding hollow columns. A spring is fitted on the first protrusion.

[0009] Preferably, the extrusion plate has positioning holes, and several positioning pins are fixedly installed on the mating flange and the limiting flange, and the positioning pins mate with the corresponding positioning holes.

[0010] Preferably, a first convex ring and a second convex ring are fixedly installed on the limiting flange, and a first sealing groove and a second sealing groove are provided on the mating flange. The first convex ring mates with the first sealing groove, and the second convex ring mates with the second sealing groove.

[0011] Preferably, a first sealing gasket is provided in the first sealing groove, and a second sealing gasket is provided in the second sealing groove.

[0012] Preferably, four sets of limiting rings are fixedly installed on both the left and right sides of the corrugated pipe, and a long bolt is installed between the left and right limiting rings. A limiting nut is threadedly connected to the right side of the long bolt.

[0013] Preferably, both the first sealing gasket and the second sealing gasket are made of polymer materials.

[0014] Preferably, an ammonia gas detector is fixedly installed on a set of sealing sleeves within the sealing mechanism.

[0015] Beneficial effects

[0016] This invention provides a leak-proof sealing device for liquid ammonia transportation pipelines. Compared with the prior art, it has the following advantages:

[0017] 1. This liquid ammonia conveying pipeline anti-leakage sealing device, by setting a sealing mechanism between the bellows and the ammonia delivery pipe, includes two sets of sealing sleeves, each containing a sealing ring. The sealing ring seals the gap between the limiting flange and the mating flange, thereby improving the sealing effect. At the same time, the extrusion assembly extrudes the limiting flange and the mating flange together, thereby improving the sealing performance between the bellows and the ammonia delivery pipe. Furthermore, the first and second sealing gaskets between the limiting flange and the mating flange also improve the sealing performance. By designing multiple sets of sealing components, the sealing performance between the pipelines is greatly improved. The integrated structure of the bellows 1 also enhances the sealing reliability of the pipeline connection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0019] Figure 2 This is a disassembly diagram of the sealing sleeve of this utility model;

[0020] Figure 3 This is a disassembly diagram of the ammonia delivery tube of this utility model;

[0021] Figure 4 This is a schematic diagram of the corrugated pipe of this utility model;

[0022] Figure 5 This is an exploded view of the sealing mechanism of this utility model;

[0023] Figure 6 This is a schematic diagram of the extrusion assembly of this utility model.

[0024] In the diagram: 1. Bellows; 2. Ammonia conduit pipe; 3. Sealing mechanism; 4. Sealing sleeve; 5. Limiting flange; 6. Matching flange; 7. First sealing groove; 8. Second sealing groove; 9. First sealing gasket; 10. Second sealing gasket; 11. Mounting ring; 12. Long bolt; 13. Limiting ring; 14. First convex ring; 15. Second convex ring; 16. Connecting flange; 17. Ammonia gas detector alarm; 18. Hollow column; 19. Mounting groove; 20. Extrusion assembly; 21. Extrusion plate; 22. First convex post; 23. Second convex post; 24. Spring; 25. Positioning hole; 26. Positioning pin; 27. Sealing ring. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-6 This utility model provides a technical solution: a leak-proof sealing device for a liquid ammonia conveying pipeline, comprising a bellows 1, with ammonia guide pipes 2 installed on both sides of the bellows 1, a sealing mechanism 3 installed between the bellows 1 and the ammonia guide pipes 2, a limit flange 5 integrally installed on both sides of the bellows 1, and a mating flange 6 integrally installed on the side of the ammonia guide pipe 2 closest to the bellows 1. The mating flange 6 and the corresponding limit flange 5 are fixedly connected by several first bolts and first nuts. The sealing mechanism 3 includes two sets of sealing sleeves 4, with sealing rings 27 installed inside the two sets of sealing sleeves 4. The sealing rings 27 are sleeved on the limit flanges 1 and 27. Between the positioning flange 5 and the mating flange 6, an extrusion assembly 20 is installed inside the sealing sleeve 4; a connecting flange 16 is integrally installed on the sealing sleeve 4, and the two sets of connecting flanges 16 are fixedly connected by several second bolts and several second nuts. An installation groove 19 is opened inside the sealing sleeve 4, and an installation ring 11 is fixedly installed on both the mating flange 6 and the positioning flange 5. The installation groove 19 mates with the corresponding installation ring 11; a positioning hole 25 is opened on the extrusion plate 21, and several positioning pins 26 are fixedly installed on both the mating flange 6 and the positioning flange 5. The positioning pins 26 mate with the corresponding positioning holes 25.

[0027] In use, after the bellows 1 and the ammonia pipe 2 are installed, first install the sealing ring 27 between the limiting flange 5 and the mating flange 6. Then, with the cooperation of the positioning column 26 and the positioning hole 25, put the sealing sleeve 4 between the ammonia pipe 2 and the bellows 1 to restrict the sealing sleeve 4, thereby improving the sealing performance between the ammonia pipe 2 and the bellows 1. At the same time, the installation ring 11 will be stuck in the installation groove 19, further improving the airtightness between the pipes. Finally, use the second bolt and the second nut to connect the two sets of sealing sleeves 4 together.

[0028] The extrusion assembly 20 includes an extrusion plate 21, on which a plurality of first protrusions 22 are fixedly installed. The first protrusions 22 are slidably connected to the sealing sleeve 4. A second protrusion 23 is fixedly installed on one side of the first protrusion 22. A plurality of hollow columns 18 are fixedly installed on the sealing sleeve 4. The second protrusions 23 are slidably connected to the corresponding hollow columns 18. A spring 24 is fitted on the first protrusion 22.

[0029] When in use, after the two sets of sealing sleeves 4 are installed, with the cooperation of the hollow column 18 and the second protrusion 23, and the action of the first protrusion 22 and the sealing sleeve 4, the spring 24 will press the extrusion plate 21 against the limiting flange 5 and the mating flange 6, so as to further improve the sealing between the limiting flange 5 and the mating flange 6.

[0030] A first convex ring 14 and a second convex ring 15 are fixedly installed on the limiting flange 5. A first sealing groove 7 and a second sealing groove 8 are provided on the mating flange 6. The first convex ring 14 mates with the first sealing groove 7, and the second convex ring 15 mates with the second sealing groove 8. A first sealing gasket 9 is provided in the first sealing groove 7, and a second sealing gasket 10 is provided in the second sealing groove 8. Both the first sealing gasket 9 and the second sealing gasket 10 are made of polymer material.

[0031] In use, the first sealing gasket 9 is installed into the first sealing groove 7, and the second sealing gasket 10 is installed into the second sealing groove 8. Then, the ammonia conduit 2 is installed onto the bellows 1. At this time, the first convex ring 14 will block the first sealing groove 7, and the second convex ring 15 will block the second sealing groove 8. Finally, the mating flange 6 and the limiting flange 5 are firmly connected together with the first bolt and the first nut. The first sealing groove 7 and the second sealing gasket 10 can effectively improve the airtightness between the ammonia conduit 2 and the bellows 1.

[0032] Four sets of limiting rings 13 are fixedly installed on both the left and right sides of the bellows 1. Long bolts 12 are installed between the left and right limiting rings 13. The right side of the long bolts 12 is threaded with a limiting nut. The long bolts 12 can ensure that the bellows 1 can reliably transmit force and torque while realizing displacement compensation and maintaining the structural stability of the system.

[0033] An ammonia gas detector 17 is fixedly installed on a set of sealing sleeves 4 inside the sealing mechanism 3; the ammonia gas detector 17 can effectively detect leaked ammonia gas and emit a popping sound to promptly remind the staff.

[0034] Working principle: When in use, the first sealing gasket 9 is installed into the first sealing groove 7, and the second sealing gasket 10 is installed into the second sealing groove 8. Then, the ammonia conduit 2 is installed onto the bellows 1. At this time, the first convex ring 14 will block the first sealing groove 7, and the second convex ring 15 will block the second sealing groove 8. Finally, the mating flange 6 and the limiting flange 5 are firmly connected together with the first bolt and the first nut. The first sealing groove 7 and the second sealing gasket 10 can effectively improve the airtightness between the ammonia conduit 2 and the bellows 1.

[0035] After the bellows 1 and the ammonia pipe 2 are installed, the sealing ring 27 is first installed between the limiting flange 5 and the mating flange 6. Then, with the cooperation of the positioning column 26 and the positioning hole 25, the sealing sleeve 4 is fitted between the ammonia pipe 2 and the bellows 1, thereby restricting the sealing sleeve 4 and improving the sealing performance between the ammonia pipe 2 and the bellows 1. At the same time, the installation ring 11 will be stuck in the installation groove 19, further improving the airtightness between the pipes. Finally, the two sets of sealing sleeves 4 are connected together with the second bolt and the second nut. After the two sets of sealing sleeves 4 are installed, with the cooperation of the hollow column 18 and the second protrusion 23, and the action of the first protrusion 22 and the sealing sleeve 4, the spring 24 will press the extrusion plate 21 against the limiting flange 5 and the mating flange 6, further improving the airtightness between the limiting flange 5 and the mating flange 6.

[0036] Among them, the long bolt 12 can ensure that the bellows 1 can reliably transmit force and torque while realizing displacement compensation and maintaining the structural stability of the system; the ammonia gas detector 17 can effectively detect the leaked ammonia gas and emit a popping sound to promptly remind the staff.

[0037] This design effectively improves the sealing performance between the bellows 1 and the ammonia pipe 2 by designing multiple sets of sealing components, thereby preventing ammonia leakage. Furthermore, the bellows 1 significantly improves the sealing reliability of the pipeline connection through four mechanisms: flexible stress absorption, integrated structure, corrosion-resistant materials, and dynamic stability.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof sealing device for a liquid ammonia transport pipeline, comprising a bellows (1), characterized in that: Ammonia guide pipes (2) are installed on both sides of the corrugated pipe (1). A sealing mechanism (3) is installed between the corrugated pipe (1) and the ammonia guide pipe (2). Limiting flanges (5) are integrally installed on both sides of the corrugated pipe (1). A mating flange (6) is integrally installed on the side of the ammonia guide pipe (2) near the corrugated pipe (1). The mating flange (6) and the corresponding limiting flange (5) are fixedly connected by several first bolts and first nuts. The sealing mechanism (3) includes two sets of sealing sleeves (4). A sealing ring (27) is installed in the two sets of sealing sleeves (4). The sealing ring (27) is sleeved between the limiting flange (5) and the mating flange (6). An extrusion assembly (20) is installed in the sealing sleeve (4).

2. The anti-leakage sealing device for a liquid ammonia conveying pipeline according to claim 1, characterized in that: A connecting flange (16) is integrally installed on the sealing sleeve (4). Two sets of connecting flanges (16) are fixedly connected by several second bolts and several second nuts. An installation groove (19) is opened in the sealing sleeve (4). An installation ring (11) is fixedly installed on the mating flange (6) and the limiting flange (5). The installation groove (19) mates with the corresponding installation ring (11).

3. The anti-leakage sealing device for a liquid ammonia conveying pipeline according to claim 1, characterized in that: The extrusion assembly (20) includes an extrusion plate (21), on which a plurality of first protrusions (22) are fixedly installed. The first protrusions (22) are slidably connected to the sealing sleeve (4). A second protrusion (23) is fixedly installed on one side of the first protrusion (22). A plurality of hollow columns (18) are fixedly installed on the sealing sleeve (4). The second protrusion (23) is slidably connected to the corresponding hollow column (18). A spring (24) is fitted on the first protrusion (22).

4. The anti-leakage sealing device for a liquid ammonia conveying pipeline according to claim 3, characterized in that: The extrusion plate (21) is provided with positioning holes (25), and several positioning pins (26) are fixedly installed on the mating flange (6) and the limiting flange (5). The positioning pins (26) are mated with the corresponding positioning holes (25).

5. The anti-leakage sealing device for a liquid ammonia conveying pipeline according to claim 1, characterized in that: The limiting flange (5) is fixedly installed with a first convex ring (14) and a second convex ring (15). The mating flange (6) is provided with a first sealing groove (7) and a second sealing groove (8). The first convex ring (14) mates with the first sealing groove (7), and the second convex ring (15) mates with the second sealing groove (8).

6. The anti-leakage sealing device for a liquid ammonia conveying pipeline according to claim 5, characterized in that: A first sealing gasket (9) is provided in the first sealing groove (7), and a second sealing gasket (10) is provided in the second sealing groove (8).

7. The anti-leakage sealing device for a liquid ammonia conveying pipeline according to claim 1, characterized in that: Four sets of limiting rings (13) are fixedly installed on both the left and right sides of the corrugated pipe (1). A long bolt (12) is installed between the left and right limiting rings (13). A limiting nut is threadedly connected to the right side of the long bolt (12).

8. A leak-proof sealing device for a liquid ammonia conveying pipeline according to claim 6, characterized in that: Both the first sealing gasket (9) and the second sealing gasket (10) are made of polymer materials.

9. A leak-proof sealing device for a liquid ammonia conveying pipeline according to claim 1, characterized in that: An ammonia detection alarm (17) is fixedly installed on a set of sealing sleeves (4) inside the sealing mechanism (3).

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