A cold box inlet and outlet pipe flange connection sealing device

Abstract

This utility model discloses a flange connection sealing device for cold box inlet and outlet pipes. In view of the problem of insufficient sealing of cold box pipes in the prior art, multiple combined sealing components are added, so that the pipes are no longer simply fixed by bolts. The gaps in the side wall of the flange are sealed, thereby improving the sealing performance and reducing the risk of leakage. It is suitable for large-scale use and promotion in industry.

Description

Technical Field

[0001] This utility model belongs to the field of cold box piping, and specifically relates to a flange connection sealing device for cold box inlet and outlet pipes. Background Technology

[0002] As a key piece of equipment in an oxygen production system, the sealing performance of the intake and exhaust pipes of the cold box directly affects the system's cooling efficiency and energy consumption. The intake and exhaust pipes of the cold box are typically sealed using flange connections.

[0003] Currently, common flange connections primarily employ a flat flange with a gasket, relying on bolt tightening for sealing. However, insufficient flange machining precision or uneven stress during installation can easily lead to uneven compression of the gasket, creating tiny gaps at the flange contact surface and causing leakage and heat loss. Especially in low-temperature environments, the sealing material is prone to cold contraction and deformation, further exacerbating the risk of leakage. Utility Model Content

[0004] The purpose of this invention is to provide a sealing device for the flange connection of the cold box inlet and outlet pipes, so as to solve the problem of insufficient sealing of cold box pipes and leakage risk in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A flange connection sealing device for inlet and outlet pipes of a cold box includes a cold box, on which pipes are provided, including an inlet pipe and an outlet pipe; a first flange is provided on the inlet pipe, and a matching second flange is provided on the outlet pipe; the inlet pipe and the outlet pipe are flange connected; and a first sealing ring is provided between the first flange and the second flange.

[0007] The outer ring of the first sealing ring is provided with a second sealing ring. The inner wall of the second sealing ring is provided with a plurality of abutting posts evenly distributed in the circumferential direction. The first sealing ring and the second sealing ring form an expansion gap through the abutting posts. The outer wall of the second sealing ring is provided with a plurality of sliding grooves evenly distributed in the circumferential direction. The sliding grooves extend along the axial direction of the second sealing ring.

[0008] The second sealing ring has two sealing rings distributed on both sides of its outer ring, and the inner ring of the sealing ring is provided with a slider that corresponds to a plurality of sliding grooves.

[0009] Multiple elastic elements are evenly distributed circumferentially between the two sealing rings.

[0010] This utility model also has the following features:

[0011] Furthermore, the first flange is provided with multiple drive plug-in components;

[0012] The drive plug-in assembly includes a drive motor mounted on the first flange, the output end of the drive motor being connected to the connecting rod, and the drive motor being able to drive the radial movement along the sealing ring;

[0013] A U-shaped insert is connected to the connecting rod near the sealing ring, and the two sealing rings can enter the opening of the U-shaped insert together;

[0014] When the two sealing rings are located within the opening of the U-shaped insert, the elastic element is in a compressed state.

[0015] Furthermore, the connection between the output end of the drive motor and the connecting rod is a gear and rack connection.

[0016] Furthermore, the feature is that the length of the slider is greater than the thickness of the sealing ring.

[0017] Furthermore, the elastic element is characterized as a compression spring.

[0018] Compared with the prior art, this utility model has the following technical effects:

[0019] This utility model relates to a flange connection sealing device for cold box inlet and outlet pipes. Addressing the problem of insufficient sealing performance of cold box pipes in existing technologies, it incorporates multiple combined sealing components, eliminating the need for simple bolt fixation between pipes. It seals the gaps in the flange sidewalls, improving sealing performance, reducing the risk of leakage, and making it suitable for large-scale industrial use and promotion. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the flange connection sealing device for the cold box inlet and outlet pipes of this utility model;

[0021] Figure 2 This is a side view of the flange connection sealing device for the cold box inlet and outlet pipes of this utility model;

[0022] Figure 3 This is a partially enlarged view of the flange connection sealing device for the cold box inlet and outlet pipes of this utility model;

[0023] Figure 4 This is a sectional view of the flange connection sealing device for the cold box inlet and outlet pipes of this utility model;

[0024] Figure 5 This is an exploded view of the flange connection sealing device for the cold box inlet and outlet pipes of this utility model.

[0025] The meanings of the labels in the diagram are as follows:

[0026] 1. Cold box; 2. Inlet pipe; 3. Exhaust pipe; 4. First flange; 5. Second flange; 6. First sealing ring; 7. Second sealing ring; 8. Abutment post; 9. Slide groove; 10. Sealing ring; 11. Sliding block; 12. Elastic element; 13. Drive motor; 14. U-shaped insert; 15. Connecting rod. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, all components in this invention are known in the prior art. For example, the drive motor is a commonly used known drive motor.

[0028] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0029] like Figure 1 and 2 As shown, a flange connection sealing device for the inlet and outlet pipes of a cold box includes a cold box 1, on which pipes are provided, including an inlet pipe 2 and an outlet pipe 3; a first flange 4 is provided on the inlet pipe 2, and a matching second flange 5 is provided on the outlet pipe 3, and the inlet pipe 2 and the outlet pipe 3 are flange connected, characterized in that a first sealing ring 6 is provided between the first flange 4 and the second flange 5.

[0030] The outer ring of the first sealing ring 6 is provided with a second sealing ring 7. The inner wall of the second sealing ring 7 is provided with a plurality of abutting posts 8 evenly distributed in the circumferential direction. The first sealing ring 6 and the second sealing ring 7 form an expansion gap through the abutting posts 8. The outer wall of the second sealing ring 7 is provided with a plurality of sliding grooves 9 evenly distributed in the circumferential direction. The sliding grooves 9 extend along the axial direction of the second sealing ring 7.

[0031] Two sealing rings 10 are distributed on both sides of the outer ring of the second sealing ring 7, and the inner ring of the sealing ring 10 is provided with sliders 11 that correspond one-to-one with multiple sliding grooves 9.

[0032] Multiple elastic elements 12 are evenly distributed circumferentially between the two sealing rings 10.

[0033] The expansion gap ensures that the second sealing ring 7 is not affected by the deformation of the first sealing ring 6.

[0034] Meanwhile, a groove 9 is formed on the second sealing ring 7, and two sealing rings 10 are set outside the groove 9. A slider 11 is also provided on the sealing ring 10. This arrangement allows the sealing rings 10 to slide along the groove 9. An elastic element 12 is located between the two sealing rings 10. When sealing is required, it is mainly fixed by the bolts of the flange itself. After fixing, the elastic element 12, through its own elasticity, presses the two sealing rings against the first flange 4 and the second flange 5, sealing the two abutting sidewalls of the sealing rings, facilitating installation and improving sealing performance.

[0035] As a preferred option, such as Figure 3-5 As shown, the first flange 4 is provided with multiple drive plug-in components;

[0036] The drive plug assembly includes a drive motor 13 disposed on the first flange 4. The output end of the drive motor 13 is connected to the connecting rod 15. The drive motor 13 can drive the radial movement along the sealing ring 10.

[0037] A U-shaped plug 14 is connected to the connecting rod 15 near the sealing ring 10, and the two sealing rings 10 can enter the opening of the U-shaped plug 14 together;

[0038] When the two sealing rings 10 are located inside the opening of the U-shaped insert 14, the elastic element 12 is in a compressed state.

[0039] During installation, firstly, the two sealing rings 10 are pressed together, and the opening of the U-shaped plug 14 is used to fasten the two sealing rings 10. After the flange is fixed with bolts, the drive motor 13 is started to release the fixing of the sealing rings 10 by the multiple U-shaped plugs 14. The elastic element 12 opens and presses the two sealing rings 10 against the two first flanges 4 and the second flange 5 to seal the two abutting side walls of the sealing ring, which further facilitates installation and improves the sealing performance.

[0040] Specifically, the output end of the drive motor 13 is connected to the connecting rod 15 via a rack and pinion connection. This rack and pinion connection is a common connection method in the field, and applying this connection method to this device improves operational stability and convenience.

[0041] As a preferred embodiment, the length of the slider 11 is greater than the thickness of the sealing ring 10, which improves the stability of the slider sliding along the groove.

[0042] Specifically, the elastic element 12 is a compression spring.

Claims

1. A sealing device for flange connection of the inlet and outlet pipes of a cold box, comprising a cold box (1) provided with pipes, said pipes comprising an inlet pipe (2) and an outlet pipe (3); said inlet pipe (2) is provided with a first flange (4), and said outlet pipe (3) is provided with a matching second flange (5), the inlet pipe (2) and the outlet pipe (3) are flange connected, characterized in that, A first sealing ring (6) is provided between the first flange (4) and the second flange (5); ​ The outer ring of the first sealing ring (6) is provided with a second sealing ring (7). The inner wall of the second sealing ring (7) is provided with a plurality of abutting posts (8) evenly distributed in the circumferential direction. The first sealing ring (6) and the second sealing ring (7) form a telescopic gap through the abutting posts (8). The outer wall of the second sealing ring (7) is provided with a plurality of sliding grooves (9) evenly distributed in the circumferential direction. The sliding grooves (9) extend along the axial direction of the second sealing ring (7). The second sealing ring (7) has two sealing rings (10) distributed on both sides of its outer ring, and the inner ring of the sealing ring (10) is provided with a slider (11) corresponding to a plurality of sliding grooves (9); A plurality of elastic elements (12) are evenly distributed circumferentially between the two sealing rings (10).

2. The cold box inlet and outlet piping flange connection sealing apparatus of claim 1, wherein, The first flange (4) is provided with multiple drive plug-in components; The drive plug-in assembly includes a drive motor (13) disposed on the first flange (4), the output end of the drive motor (13) is connected to the connecting rod (15), and the drive motor (13) can drive the radial movement along the sealing ring (10); The connecting rod (15) is connected to a U-shaped plug (14) near the sealing ring (10), and the two sealing rings (10) can enter the opening of the U-shaped plug (14) together; When the two sealing rings (10) are located inside the opening of the U-shaped insert (14), the elastic element (12) is in a compressed state.

3. The cold box inlet and outlet piping flange connection sealing apparatus of claim 2, wherein, The connection between the output end of the drive motor (13) and the connecting rod (15) is a gear and rack connection.

4. A cold box inlet and outlet duct flange connection sealing arrangement according to any one of claims 1 to 3, characterised in that, The length of the slider (11) is greater than the thickness of the sealing ring (10).

5. A cold box inlet and outlet duct flange connection sealing device as claimed in any one of claims 1 to 2, wherein, The elastic element (12) is a compression spring.

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