A sealing member for a steam filtering and purifying device

Abstract

This utility model provides a sealing component for a steam filtration and purification device, relating to the field of steam treatment technology. It includes a first housing and a second housing. A flange is fixed to the first housing, and a connecting ring is provided on the second housing. A metal spiral wound gasket is installed between the connecting ring and the flange. A flange assembly is fitted onto the outer wall of the second housing. The flange assembly includes a fitting ring, a flange ring, and a compression spring. A displacement ring groove is formed on the outer edge of the fitting ring, and a spherical ring is integrally formed within the displacement ring groove. A spherical ring groove is provided on the inner wall of the flange ring. A positioning ring is welded and fixed to the outer side of the second housing. The compression spring abuts against the positioning ring and the flange ring. The flange and the flange ring are connected by fastening bolts. This utility model ensures that the flange and flange ring remain parallel and evenly stressed when tightening the fastening bolts, preventing the metal spiral wound gasket from becoming unbalanced and causing sealing failure.

Description

Technical Field

[0001] This utility model relates to the field of steam treatment technology, specifically a sealing component for a steam filtration and purification device. Background Technology

[0002] Boiler steam may carry solid particles remaining from boiler water treatment, pipeline corrosion products, and impurities generated during boiler operation. These impurities can clog the small channels or coils of waste heat recovery equipment, significantly reducing heat exchange efficiency and even causing complete equipment failure. Therefore, hot steam needs to be filtered and purified before entering the preheating recovery system. Since the temperature in hot steam pipelines is usually extremely high, often exceeding 200°C and even reaching over 500°C, non-metallic sealing rings will rapidly age, decompose, lose elasticity, harden, carbonize, or melt under such high temperatures, leading to seal failure. Therefore, metal sealing rings are usually selected for sealing in hot steam filtration and purification devices.

[0003] However, metal sealing rings have high requirements for flange parallelism and usually require precise control of bolt torque. In actual operation, the bolts need to be tightened in a fixed order and the torque of each bolt needs to be controlled, making the connection process cumbersome. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a sealing component for a steam filtration and purification device, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A sealing element for a steam filtration and purification device includes a first housing and a second housing, which are connected by fastening bolts. A flange is fixed on the first housing, and a connecting ring is provided on the second housing. A metal spiral wound gasket is installed between the connecting ring and the flange. A flange assembly is fitted on the outer wall of the second housing, and the flange assembly abuts against the rear side of the connecting ring. The fastening bolts are connected between the flange assembly and the flange.

[0009] Preferably, the flange assembly includes a sleeve ring, a flange ring, and a compression spring. The outer edge of the sleeve ring is provided with a displacement ring groove, and a spherical ring is integrally formed in the displacement ring groove. The inner wall of the flange ring is provided with a spherical ring groove, and the spherical ring groove is slidably fitted onto the spherical ring. A positioning ring is welded and fixed to the outer side of the second housing, and the compression spring abuts against the positioning ring and the flange ring.

[0010] Preferably, the front side of the sleeve ring is provided with an abutting groove that mates with the connecting ring, and the inner wall of the abutting groove abuts against the rear side of the connecting ring.

[0011] Preferably, stepped rings are provided on the front and rear sides of the fitting ring, and the outer diameter of the stepped rings is larger than the outer diameter of the spherical ring.

[0012] Preferably, a displacement groove is provided on the front side of the flange ring, and the inner diameter of the displacement groove is larger than the outer diameter of the front stepped ring.

[0013] Preferably, the flange and the connecting ring are provided with corresponding sealing ring grooves, the two sides of the metal spiral wound gasket abut against the sealing ring grooves, and the flange and the connecting ring are provided with mutually convex and concave positioning cone grooves and positioning cones.

[0014] (III) Beneficial Effects

[0015] This utility model provides a sealing element for a steam filtration and purification device. It has the following beneficial effects:

[0016] 1. In this utility model, the positioning conical groove and positioning conical platform on the flange and connecting ring are mutually concave and convex, which can make the first shell and the second shell parallel to each other. The flange ring can slide freely on the sleeve ring face ring. The two flanges and the connecting ring can be clamped together by tightening the fastening bolts. When the torque of the fastening bolts on the flange and the flange ring is not balanced, the flange ring can rotate on the sleeve ring to compensate for the torque difference, always keeping the flange and the connecting ring parallel to each other, and maintaining the sealing effect of the metal sealing ring. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a sealing element for a steam filtration and purification device according to the present invention;

[0018] Figure 2 This is a schematic diagram of the flange assembly in this utility model.

[0019] In the figure: 1. First housing; 2. Second housing; 3. Flange; 4. Fastening bolt; 5. Sealing ring groove; 6. Connecting ring; 7. Positioning ring; 8. Positioning cone; 9. Metal spiral wound gasket; 10. Fitting ring; 11. Flange ring; 12. Compression spring; 13. Step ring; 14. Spherical ring; 15. Displacement groove. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] This utility model provides a sealing component for a steam filtration and purification device, such as... Figure 1-2As shown, it includes a first housing 1 and a second housing 2. The first housing 1 and the second housing 2 are connected by fastening bolts 4. A flange 3 is fixed on the first housing 1. Several flange holes are distributed around the flange 3. A positioning cone groove is opened on the side of the flange 3 facing the second housing 2. A sealing ring groove 5 is opened around the positioning cone groove.

[0022] A connecting ring 6 is provided on the second housing 2, and a positioning ring 7 is welded and fixed to the middle of the outer wall of the second housing 2. A positioning cone 8 that mates with the positioning cone groove is provided on the side of the connecting ring 6 facing the first housing 1. A sealing ring groove 5 that aligns with the sealing ring groove 5 is also provided on the periphery of the positioning cone 8. When the first housing 1 and the second housing 2 are docked, the positioning cone 8 can be inserted into the positioning cone groove to play a guiding and positioning role, so that the connecting ring 6 is concentrically aligned with the flange 3 and remains parallel. The two sealing ring grooves 5 also form a sealing ring cavity. A metal spiral wound gasket 9 is installed between the connecting ring 6 and the flange 3. The two sides of the metal spiral wound gasket 9 are installed in the sealing ring cavity to form a seal.

[0023] A flange assembly is fitted onto the outer wall of the second housing 2 between the connecting ring 6 and the positioning ring 7. The flange assembly includes a fitting ring 10, a flange ring 11, and a compression spring 12. The front side of the fitting ring 10 is provided with an abutment groove that mates with the connecting ring 6. The inner wall of the abutment groove abuts against the rear side of the connecting ring 6. A displacement ring groove is formed on the outer edge of the fitting ring 10. A spherical ring 14 is integrally formed in the displacement ring groove. Stepped rings 13 are provided on the front and rear sides of the fitting ring 10. The outer diameter of the stepped ring 13 is larger than the outer diameter of the spherical ring 14. The inner wall of the flange ring 11 is provided with a groove for the spherical ring 14. The groove for the spherical ring 14 is slidably fitted onto the spherical ring 14. The flange ring 11 can be spherically fitted on the outer side of the fitting ring 10. When rotated to a certain angle, the stepped ring 13 can limit the rotation angle of the flange ring 11 to prevent the flange ring 11 from slipping out. The compression spring 12 abuts between the positioning ring 7 and the flange ring 11. The compression spring 12 can keep the flange ring 11 in a horizontal state when it is not under force, so as to achieve the initial alignment of the first housing 1 and the second housing 2. The flange ring 11 is provided with a displacement groove 15 on its front side. The inner diameter of the displacement groove 15 is larger than the outer diameter of the stepped ring 13 on the front side. The displacement groove 15 can prevent the stepped ring 13 from jamming the flange ring 11 when the flange ring 11 rotates on the sleeve ring 10. The flange ring 11 is also provided with flange holes corresponding to the flange 3. The fastening bolt 4 passes through the flange holes of the flange 3 and the flange ring 11.

[0024] Working principle:

[0025] In this invention, the flange ring 11 is kept horizontal under the action of the compression spring 12. When the first housing 1 and the second housing 2 are initially aligned, the flange ring 11 will not obstruct the alignment of the flange ring 11 with the flange of the flange 3, so that the fastening bolt 4 can be inserted smoothly. This avoids the flange hole of the flange ring 11 being tilted, which would prevent the fastening bolt 4 from passing smoothly through the flange hole of the flange 3. When the flange 3 and the flange ring 11 are aligned, the positioning cone 8 can be inserted into the positioning cone groove in a concave-convex fit, so that the flange 3 and the flange ring 11 are level. With concentric positioning, when tightening the bolts 4, the flange ring 11 pushes the sleeve ring 10 through the spherical groove to squeeze the connecting ring 6, pressing the connecting ring 6 and the flange 3 together and keeping them parallel, so that the metal spiral wound gasket 9 can fit tightly with the sealing ring groove 5. When the torque of the bolts 4 is different, the flange ring 11 rotates and tilts on the spherical ring 14 of the sleeve ring 10, and keeps the squeezing force of the sleeve ring 10 on the connecting ring 6 always vertical and will not deviate, so as to avoid the imbalance of pressure distribution on the metal spiral wound gasket 9 and reduce the leakage rate.

[0026] Compared with traditional flange connections, which require ensuring that the torque of each bolt 4 is equal and that the bolts 4 are tightened in sequence, this method offers better sealing and ease of use.

[0027] 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 sealing element for a steam filtration and purification device, comprising a first housing and a second housing, wherein the first housing and the second housing are connected by fastening bolts, characterized in that: A flange is fixed on the first housing, a connecting ring is provided on the second housing, a metal spiral wound gasket is installed between the connecting ring and the flange, a flange assembly is fitted on the outer wall of the second housing, the flange assembly abuts against the rear side of the connecting ring, and the fastening bolts are connected between the flange assembly and the flange.

2. The sealing element for a steam filtration and purification device according to claim 1, characterized in that: The flange assembly includes a sleeve ring, a flange ring, and a compression spring. The outer edge of the sleeve ring has a displacement ring groove, and a spherical ring is integrally formed inside the displacement ring groove. The inner wall of the flange ring has a spherical ring groove, which is slidably fitted onto the spherical ring. A positioning ring is welded and fixed to the outer side of the second housing. The compression spring abuts against the positioning ring and the flange ring.

3. A sealing element for a steam filtration and purification device according to claim 2, characterized in that: The front side of the sleeve ring is provided with an abutting groove that mates with the connecting ring, and the inner wall of the abutting groove abuts against the rear side of the connecting ring.

4. A sealing element for a steam filtration and purification device according to claim 3, characterized in that: The front and rear sides of the fitting ring are provided with stepped rings, and the outer diameter of the stepped rings is larger than the outer diameter of the spherical ring.

5. A sealing element for a steam filtration and purification device according to claim 4, characterized in that: A displacement groove is provided on the front side of the flange ring, and the inner diameter of the displacement groove is larger than the outer diameter of the stepped ring on the front side.

6. A sealing element for a steam filtration and purification device according to claim 5, characterized in that: The flange and connecting ring are provided with corresponding sealing ring grooves, and the two sides of the metal spiral wound gasket abut against the sealing ring grooves. The flange and connecting ring are provided with positioning cone grooves and positioning cones that fit each other.

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