Sealing ring for inlet cylinder of backwashing filter

Abstract

The utility model provides a seal ring for backwash filter inlet cylinder, including cylinder body, piston body, seal ring body and nitrile butadiene wear-resistant ring, piston body is provided in the cylinder body, and the outer wall of piston body is provided with seal groove, seal ring body is provided in seal groove, and the nitrile butadiene wear-resistant ring is provided in the seal groove. An annular groove is formed in the outer wall of the sealing ring body, the butyronitrile wear-resisting ring is arranged in the annular groove, and an arc-shaped concave face is arranged on the surface of the butyronitrile wear-resisting ring. The utility model has the advantages of good sealing performance, small friction coefficient, good wear resistance and durability.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment sealing, in particular to a sealing ring used for an inlet cylinder of a backwash filter. Background Art

[0002] A naphthenic oil hydrotreating unit is a device used to hydrotreat naphthenic oils, primarily used to produce high-value-added products such as refined gasoline, refined diesel, tail oil, and desulfurized liquefied petroleum gas. The backwash filter in a naphthenic oil hydrotreating unit is a crucial component of the unit's operation, responsible for purifying the feedstock and ensuring continuous and efficient filtration.

[0003] The feed backwash filter of the device is used frequently. As the running time goes by, the friction between the cylinder piston seal and the cylinder increases, and the cylinder piston seal is severely worn and gas blowby occurs, affecting the normal operation of the valve. Moreover, the seal is generally a single structure with average sealing performance, which causes the reaction feed filter to be unable to be put into use normally, and ultimately leads to production reduction or shutdown due to insufficient raw materials. Therefore, we propose a seal for the inlet cylinder of the backwash filter. Utility Model Content

[0004] The purpose of the utility model is to provide a sealing ring for a backwash filter inlet cylinder to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] The utility model discloses a sealing ring for a backwash filter inlet cylinder, comprising a sealing ring body and a nitrile wear-resistant ring arranged between a cylinder body and a piston body, a sealing groove being arranged on an outer wall of the piston body, one side of the sealing ring body extending into the sealing groove, and the other opposite side extending out of the sealing groove and being provided with an annular groove, the nitrile wear-resistant ring being arranged in the annular groove, a surface of the nitrile wear-resistant ring being provided with an arc-shaped concave surface, and the arc-shaped concave surface being arranged close to the cylinder body.

[0007] It is further defined that the sealing ring body includes an inner ring and an outer ring arranged around the outer side of the inner ring, the inner ring is arranged close to the piston body, and the annular groove is arranged on the outer ring.

[0008] It is further defined that the outer ring and the inner ring are integrally formed.

[0009] It is further defined that an upper ring groove is provided on the inner wall of the top of the sealing groove, and a lower ring groove is provided on the inner wall of the bottom of the sealing groove, and the upper ring groove and the lower ring groove are both used to connect with the sealing ring body.

[0010] It is further defined that an upper arc-shaped convex ring is provided on the upper surface of the inner ring, the upper arc-shaped convex ring and the inner ring are integrally formed, and the upper arc-shaped convex ring is tightly engaged with the upper ring groove.

[0011] It is further defined that a lower arc-shaped convex ring is provided on the lower surface of the inner ring, the lower arc-shaped convex ring and the inner ring are integrally formed, and the lower arc-shaped convex ring is tightly engaged with the lower ring groove.

[0012] It is further defined that a wear-resistant layer is provided on the outer surface of the sealing ring body.

[0013] It is further defined that the outer surface of the wear-resistant layer is provided with a corrosion-resistant coating.

[0014] It is further defined that the outer surface of the corrosion-resistant coating is provided with a lubricating coating.

[0015] It is further defined that the wear-resistant layer is a nitride layer; the corrosion-resistant coating is a polytetrafluoroethylene layer; and the lubricating coating is a parylene film layer.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The sealing ring body is composed of an outer ring and an inner ring. The sealing ring plays a sealing role between the piston body and the cylinder body. Since the upper arc-shaped convex ring and the lower arc-shaped convex ring on the upper and lower surfaces of the inner ring are respectively stuck in the upper ring groove and the lower ring groove on the upper and lower inner walls of the sealing groove, not only can the sealing performance of the sealing ring body be further improved, but also the sealing ring body can be limited. When the piston body moves horizontally, the sealing ring body is ensured to be firmly fixed in the sealing groove without slipping. Since the surface of the nitrile wear-resistant ring inside the annular groove on the outer wall of the sealing ring body is respectively provided with an arc-shaped concave surface and an arc-shaped convex surface, the contact area between the sealing ring body and the cylinder body is reduced, and the nitrile wear-resistant ring is made of nitrile rubber with good wear resistance, thereby effectively reducing the friction coefficient of the sealing ring and improving its wear resistance and service life.

[0018] The wear-resistant layer on the outer surface of the sealing ring body is a nitride layer. The nitride layer is formed by immersing nitrogen into the surface of the sealing ring body, thereby improving its hardness and wear resistance. The corrosion-resistant coating is a polytetrafluoroethylene layer, which has excellent acid and alkali resistance, organic solvent resistance, weather resistance, high thermal conductivity, high mechanical strength, hydrophobicity and low friction. The lubricating coating is a parylene film layer, which is formed on the surface of the sealing ring body by chemical vapor deposition. This coating has excellent dry lubricity and a low friction coefficient, which can improve the dryness of the sealing ring. The parylene coating is also resistant to corrosion by organic solvents and can maintain its integrity and lubrication properties in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 For the utility model Figure 1 A in the middle is an enlarged structural diagram;

[0021] Figure 3 This is a schematic diagram of the enlarged cross-sectional structure of the sealing ring body of the present invention;

[0022] Figure 4 This is an enlarged schematic diagram of the sealing ring body of the utility model from a top view;

[0023] Figure 5 It is a partial enlarged structural diagram of the sealing ring body of the present utility model.

[0024] In the figure: 1. Cylinder body; 2. Piston body; 3. Sealing groove; 4. Sealing ring body; 5. Upper ring groove; 6. Annular groove; 7. Nitrile wear-resistant ring; 8. Arc-shaped concave surface; 9. Arc-shaped convex surface; 10. Lower ring groove; 11. Upper arc-shaped convex ring; 12. Lower arc-shaped convex ring; 13. Outer ring; 14. Inner ring; 15. Wear-resistant layer; 16. Corrosion-resistant coating; 17. Lubricating coating. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-5The utility model provides an embodiment: a sealing ring for a backwash filter inlet cylinder, comprising a sealing ring body 4 and a nitrile wear-resistant ring 7 arranged between a cylinder body 1 and a piston body 2, wherein the piston body 2 is arranged inside the cylinder body 1, and a sealing groove 3 is provided on the outer wall of the piston body 2, the sealing ring body 4 is arranged in the sealing groove 3, and the inner ring 14 on the inner side of the sealing ring body 4 is inserted into the sealing groove 3 on the outer wall of the piston body 2, wherein one side of the sealing ring body 4 extends into the sealing groove 3, and the other side oppositely extends outside the sealing groove 3 and is provided with an annular groove 6, the nitrile wear-resistant ring 7 is arranged in the annular groove 6, and the surface of the nitrile wear-resistant ring 7 is provided with an arc-shaped concave surface 8, and the arc-shaped concave surface 8 is arranged close to the cylinder body 1. The nitrile wear-resistant ring 7 is arranged in the annular groove 6, and the surface of the nitrile wear-resistant ring 7 is provided with an arc-shaped concave surface 8, and an arc-shaped convex surface 9 is formed on the upper and lower sides of the arc-shaped concave surface 8. Specifically, since the surface of the nitrile wear-resistant ring 7 inside the annular groove 6 on the outer wall of the sealing ring body 4 is respectively provided with an arc-shaped concave surface 8 and an arc-shaped convex surface 9, the contact area between the sealing ring body 4 and the cylinder body 1 is reduced, and the nitrile wear-resistant ring 7 is made of nitrile rubber material with good wear resistance, thereby effectively reducing the friction coefficient of the sealing ring, improving its wear resistance and service life, and at the same time ensuring good sealing performance.

[0028] In the present invention, the sealing ring body 4 is composed of an outer ring 13 and an inner ring 14, and the outer ring 13 and the inner ring 14 are integrally formed. The outer ring 13 of the outer side of the sealing ring body 4 fits tightly against the inner wall of the cylinder body 1, thereby sealing the piston body 2 and the cylinder body 1. Since the upper arc-shaped convex ring 11 on the upper surface of the inner ring 14 and the lower arc-shaped convex ring 12 on the lower surface are respectively inserted into the upper ring groove 5 on the upper inner wall of the sealing groove 3 and the lower ring groove 10 on the lower inner wall, not only can the sealing performance of the sealing ring body 4 be further improved, but also the sealing ring body 4 can be limited. When the piston body 2 moves horizontally, it is ensured that the sealing ring body 4 is firmly fixed in the sealing groove 3 without slipping.

[0029] In the present invention, an upper ring groove 5 is provided on the inner wall of the top of the sealing groove 3, and a lower ring groove 10 is provided on the inner wall of the bottom of the sealing groove 3; preferably, the outer ring 13 and the inner ring 14 are integrally formed.

[0030] In the present invention, an upper arc-shaped convex ring 11 is provided on the upper surface of the inner ring 14 . The upper arc-shaped convex ring 11 and the inner ring 14 are integrally formed, and the upper arc-shaped convex ring 11 is tightly engaged with the upper ring groove 5 .

[0031] In the present invention, a lower arc-shaped convex ring 12 is provided on the lower surface of the inner ring 14 . The lower arc-shaped convex ring 12 and the inner ring 14 are integrally formed, and the lower arc-shaped convex ring 12 is tightly engaged with the lower annular groove 10 .

[0032] In the present invention, a wear-resistant layer 15 is provided on the outer surface of the sealing ring body 4, and the wear-resistant layer 15 is a nitride layer.

[0033] In the present invention, the outer surface of the wear-resistant layer 15 is provided with a corrosion-resistant coating 16, which is a polytetrafluoroethylene layer with excellent acid and alkali resistance, organic solvent resistance, weather resistance, high thermal conductivity, high mechanical strength, hydrophobicity and low friction.

[0034] In the present invention, the outer surface of the corrosion-resistant coating 16 is provided with a lubricating coating 17 , which is a parylene film layer. The parylene film layer is attached to the surface of the sealing ring body 4 by chemical vapor deposition.

[0035] Specifically, this coating has excellent dry lubricity and a low coefficient of friction, which can improve the dryness of the sealing ring. The parylene coating is also resistant to corrosion by organic solvents and can maintain its integrity and lubrication properties in harsh environments.

[0036] When the embodiment of the present application is in use: first, the sealing ring body 4 is composed of an outer ring 13 and an inner ring 14. The outer ring 13 and the inner ring 14 are integrally formed. The inner ring 14 on the inner side of the sealing ring body 4 is stuck in the sealing groove 3 on the outer wall of the piston body 2. The outer ring 13 on the outer side of the sealing ring body 4 is tightly fitted with the inner wall of the cylinder body 1, which plays a sealing role between the piston body 2 and the cylinder body 1. Since the upper arc-shaped convex ring 11 and the lower arc-shaped convex ring 12 on the upper and lower surfaces of the inner ring 14 are respectively stuck in the upper ring groove 5 on the upper inner wall of the sealing groove 3 and the lower ring groove 10 on the lower inner wall, it can not only further The sealing performance of the sealing ring body 4 is improved, and the sealing ring body 4 can be limited. When the piston body 2 translates, the sealing ring body 4 is ensured to be firmly fixed in the sealing groove 3 without slipping. Then, since the surface of the nitrile wear-resistant ring 7 inside the annular groove 6 on the outer wall of the sealing ring body 4 is respectively provided with an arc-shaped concave surface 8 and an arc-shaped convex surface 9, the contact area between the sealing ring body 4 and the cylinder body 1 is reduced, and the nitrile wear-resistant ring 7 is made of nitrile rubber material with good wear resistance, which can effectively reduce the friction coefficient of the sealing ring and improve its wear resistance and service life. In addition, the wear-resistant layer 15 on the outer surface of the sealing ring body 4 is a nitride layer. The nitride layer is formed by immersing nitrogen into the surface of the sealing ring body 4, thereby improving its hardness and wear resistance. The corrosion-resistant coating 16 is a polytetrafluoroethylene layer, which has excellent acid and alkali resistance, organic solvent resistance, weather resistance, high thermal conductivity, high mechanical strength, hydrophobicity and low friction. The lubricating coating 17 is a parylene film layer, which is formed on the surface of the sealing ring body 4 by chemical vapor deposition. This coating has excellent dry lubricity and low friction coefficient, which can improve the dryness of the sealing ring. The parylene coating is also resistant to corrosion by organic solvents and can maintain its integrity and lubrication performance in harsh environments. In summary, the sealing ring proposed in this application not only has good sealing performance, but also has a low friction coefficient, good wear resistance, and is durable. It solves the problem of cylinder blowby caused by poor sealing, avoids the occurrence of the filter not being able to be put into normal use due to untimely valve action, and reduces the risk of device operation.

[0037] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A sealing ring for a backwash filter inlet cylinder, characterized in that: The invention comprises a sealing ring body (4) and a nitrile wear-resistant ring (7) arranged between a cylinder body (1) and a piston body (2); a sealing groove (3) is arranged on the outer wall of the piston body (2); one side of the sealing ring body (4) extends into the sealing groove (3); the other side opposite thereto extends outside the sealing groove (3) and is provided with an annular groove (6); the nitrile wear-resistant ring (7) is arranged in the annular groove (6); a surface of the nitrile wear-resistant ring (7) is provided with an arc-shaped concave surface (8), and the arc-shaped concave surface (8) is arranged close to the cylinder body (1).

2. A sealing ring for a backwash filter inlet cylinder according to claim 1, characterized in that: The sealing ring body (4) comprises an inner ring (14) and an outer ring (13) arranged around the outer side of the inner ring (14); the inner ring (14) is arranged close to the piston body (2); and the annular groove (6) is arranged on the outer ring (13).

3. A sealing ring for a backwash filter inlet cylinder according to claim 2, characterized in that: The outer ring (13) and the inner ring (14) are integrally formed.

4. The sealing ring for the inlet cylinder of the backwash filter according to claim 3, characterized in that: An upper ring groove (5) is provided on the inner wall of the top of the sealing groove (3), and a lower ring groove (10) is provided on the inner wall of the bottom of the sealing groove (3). Both the upper ring groove (5) and the lower ring groove (10) are used to connect with the sealing ring body (4).

5. The sealing ring for the inlet cylinder of the backwash filter according to claim 4, characterized in that: An upper arc-shaped convex ring (11) is provided on the upper surface of the inner ring (14). The upper arc-shaped convex ring (11) and the inner ring (14) are integrally formed, and the upper arc-shaped convex ring (11) is tightly engaged with the upper ring groove (5).

6. The sealing ring for the inlet cylinder of the backwash filter according to claim 4, characterized in that: The lower surface of the inner ring (14) is provided with a lower arc-shaped convex ring (12), the lower arc-shaped convex ring (12) and the inner ring (14) are integrally formed, and the lower arc-shaped convex ring (12) is tightly engaged with the lower annular groove (10).

7. The sealing ring for the inlet cylinder of the backwash filter according to claim 1, characterized in that: A wear-resistant layer (15) is provided on the outer surface of the sealing ring body (4).

8. The sealing ring for the inlet cylinder of the backwash filter according to claim 7, characterized in that: The outer surface of the wear-resistant layer (15) is provided with a corrosion-resistant coating (16).

9. The sealing ring for the inlet cylinder of the backwash filter according to claim 8, characterized in that: The outer surface of the corrosion-resistant coating (16) is provided with a lubricating coating (17).

10. The sealing ring for the inlet cylinder of the backwash filter according to claim 9, characterized in that: The wear-resistant layer (15) is a nitride layer; the corrosion-resistant coating (16) is a polytetrafluoroethylene layer; and the lubricating coating (17) is a parylene film layer.

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