Device for sealing nitrogen through spring plug

Abstract

The utility model relates to the technical field of nitrogen sealing devices, and discloses a spring plug nitrogen sealing device which comprises a lifting oil cylinder body, a scraper driving rod is arranged at the output end of the bottom end of the lifting oil cylinder body, and a bottom connecting cylinder is arranged on the outer side of the scraper driving rod. A bottom side sealing cavity and a sealing ring mounting groove are formed in the bottom, making contact with the bottom connecting cylinder, of the scraper driving rod, a spring plug sealing ring and a sealing ring spacer bush are arranged in the bottom side sealing cavity, and the scraper driving rod is inserted into the bottom connecting cylinder in a sliding mode and penetrates through the bottom of the bottom connecting cylinder. The dustproof sealing ring is arranged in the sealing ring mounting groove, so that the dustproof sealing ring and the lifting oil cylinder main body can be effectively protected, corrosion or abrasion of internal parts of the lifting oil cylinder main body is avoided, long-time operation of equipment is guaranteed, and particularly, the blocking effect on incompletely dehydrated viscous materials and small-particle dust materials of a centrifugal machine is more remarkable.

Description

Technical Field

[0001] The utility model relates to the technical field of sealed nitrogen devices, in particular to a pan-seal sealed nitrogen device. Background Art

[0002] The Varisal seal is a type of seal with a special spring built into a U-shaped seal. The Varisal seal is installed in a groove. The spring is compressed to form an outward tension, which causes the sealing lip on the top of the sealing shell to fit tightly against the groove. Since the spring permanently provides elastic force to the sealing lip, it can compensate for the wear of the sealing shell and the eccentricity of the mating parts, thereby forming a seal from vacuum to low pressure, preventing the medium from leaking from adjacent joint surfaces and preventing external impurities such as dust and moisture from invading. In addition, the system pressure will assist the spring in storing energy. The greater the pressure, the more fully the sealing lip fits the groove, thereby forming a high-pressure seal. Varisal seals are widely used in dispensing valves, power steering gears, jet valves, vacuum pumps and other scenarios.

[0003] Since the existing standard scraper device generally does not use a gas flushing device, when encountering sticky materials, easily adhered materials, and materials with small particles, they are easy to rise and fall with the lifting cylinder and gradually enter the scraper, corroding or wearing the internal parts of the scraper assembly, causing equipment failure and making it difficult to meet the user's usage standards. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pan-seal nitrogen device, which solves the problem that the existing standard scraper device generally does not adopt a gas flushing device. When encountering sticky materials, easily adhered materials, and materials with small particles, they are easy to rise and fall with the lifting cylinder and gradually enter the scraper, corroding or wearing the internal parts of the scraper assembly, causing equipment failure and difficulty in meeting the user's usage standards.

[0005] The utility model provides the following technical solution: a flood seal nitrogen device, comprising a lifting cylinder body, a scraper drive rod is arranged at the output end of the bottom end of the lifting cylinder body, a bottom connecting tube is arranged on the outer side of the scraper drive rod, the scraper drive rod is slidably inserted in the bottom connecting tube and passes through the bottom of the bottom connecting tube;

[0006] A scraper mounting head is installed at the bottom end of the scraper driving rod, a bottom side sealing cavity is opened at the bottom end of the bottom connecting tube, a connecting retaining spring is arranged in the bottom side sealing cavity, a universal seal ring is arranged on the bottom side of the connecting retaining spring, the connecting retaining spring and the universal seal ring are both arranged on the outside of the scraper driving rod, a sealing ring spacer is arranged on the bottom side of the universal seal ring, a sealing ring mounting groove is opened on the bottom side wall of the bottom side sealing cavity, a dustproof sealing ring is arranged in the sealing ring mounting groove, and the dustproof sealing ring sleeve is arranged on the outside of the scraper driving rod.

[0007] Preferred technical solution 1: The side wall of the bottom sealed cavity is connected to a first air supply channel, and the side of the first air supply channel is connected to a second air supply channel.

[0008] Preferred technical solution 2: A first sealing plug is provided at the open end of the first gas transmission channel, and a second sealing plug is provided at the open end of the second gas transmission channel.

[0009] Preferred technical solution three: A screw hole connected to the lifting cylinder body is provided on the side of the bottom connecting tube.

[0010] This solution can make the connection between the bottom connecting tube and the lifting cylinder body more convenient.

[0011] Preferred technical solution 4: the pan seal ring is in an H-shape for easy sealing.

[0012] This solution can make the Variseal seal ring more tightly seal the side of the scraper drive rod.

[0013] Preferred technical solution five: A key groove is provided on the outer side of the end of the scraper mounting head for easy connection.

[0014] This solution can make the connection between the scraper mounting head and the external scraper more convenient.

[0015] Compared with the prior art, the utility model provides a pan-seal nitrogen device having the following features:

[0016] Beneficial effects:

[0017] (1) The utility model provides a bottom sealing cavity and a sealing ring installation groove at the bottom where the scraper driving rod contacts the bottom connecting tube, a universal plug sealing ring and a sealing ring spacer are provided in the bottom sealing cavity, a dustproof sealing ring is provided in the sealing ring installation groove, and a first air supply passage and a second air supply passage are provided on the side of the sealing ring spacer. By conveying nitrogen into the first air supply passage and the second air supply passage, the conveyed nitrogen can be blown to the bottom of the dustproof sealing ring, so that the material can be more effectively isolated on the outside of the dustproof sealing ring, and the dustproof sealing ring and the lifting cylinder body can be effectively protected, so that the scraper driving rod can be driven to drive the sticky or easily adherent material attached to the scraper surface installed on the scraper installation head into the lifting cylinder body, so as to avoid corrosion or wear of the internal parts of the lifting cylinder body, and ensure the long-term operation of the equipment, especially for the sticky material and small particle dust material that are not completely dehydrated by the centrifuge. The blocking effect is more significant. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2It is a schematic diagram of the main cross-section of the structure of the utility model;

[0020] Figure 3 For the utility model Figure 2 A magnified view of the structure of the sealing cavity on the middle bottom side;

[0021] Figure 4 For the utility model Figure 2 An enlarged view of the structure of the first gas transmission channel.

[0022] In the figure:

[0023] 1. Lifting cylinder body; 2. Scraper driving rod; 3. Bottom connecting tube; 4. Scraper mounting head; 5. Bottom sealing chamber; 6. Connecting retaining spring; 7. Pan-plug sealing ring; 8. Sealing ring spacer; 9. Sealing ring mounting groove; 10. Dustproof sealing ring; 11. First air supply channel; 12. Second air supply channel; 13. First sealing plug; 14. Second sealing plug. DETAILED DESCRIPTION

[0024] See also Figure 1-4

[0025] Embodiment 1: A pan-seal nitrogen device comprises a lifting cylinder body 1, a scraper drive rod 2 is arranged at the output end at the bottom end of the lifting cylinder body 1, a bottom connecting tube 3 is arranged on the outer side of the scraper drive rod 2, and the scraper drive rod 2 is slidably inserted in the bottom connecting tube 3 and passes through the bottom of the bottom connecting tube 3.

[0026] A scraper mounting head 4 is installed at the bottom end of the scraper driving rod 2, a bottom side sealing cavity 5 is opened at the bottom end of the bottom connecting tube 3, a connecting retaining spring 6 is arranged in the bottom side sealing cavity 5, a universal sealing ring 7 is arranged on the bottom side of the connecting retaining spring 6, the connecting retaining spring 6 and the universal sealing ring 7 are both arranged on the outside of the scraper driving rod 2, and a sealing ring spacer 8 is arranged on the bottom side of the universal sealing ring 7.

[0027] A sealing ring installation groove 9 is provided on the bottom side wall of the bottom sealing cavity 5, and a dustproof sealing ring 10 is arranged in the sealing ring installation groove 9. The dustproof sealing ring 10 is sleeved on the outer side of the scraper driving rod 2. The side wall of the bottom sealing cavity 5 is connected with a first air supply passage 11, and the side of the first air supply passage 11 is connected with a second air supply passage 12. A first sealing plug 13 is provided at the open end of the first air supply passage 11, and a second sealing plug 14 is provided at the open end of the second air supply passage 12.

[0028] Embodiment 2: The difference between this embodiment and embodiment 1 is that a screw hole connected to the lifting cylinder body 1 is provided on the side of the bottom connecting tube 3 .

[0029] This makes the connection between the bottom connecting tube 3 and the lifting cylinder body 1 more convenient.

[0030] Embodiment 3: The difference between this embodiment and embodiment 1 is that the Variseal seal ring 7 is in an H-shape for easy sealing.

[0031] This enables the Variseal seal ring 7 to seal the side of the scraper drive rod 2 more tightly.

[0032] Embodiment 4: The difference between this embodiment and embodiment 1 is that a key groove is provided on the outer side of the end of the scraper mounting head 4 for easy connection.

[0033] This makes the connection between the scraper mounting head 4 and the external scraper more convenient.

[0034] In this embodiment, since the existing standard scraper device generally does not use a gas flushing device, when encountering sticky materials, easily adhered materials, and materials with small particles, they are easy to enter the scraper along with the lifting of the lifting cylinder, corrode or wear the internal parts of the scraper assembly, causing equipment failure, and it is difficult to meet the user's usage standards.

[0035] In summary, in a specific implementation, a scraper driving rod 2 is provided at the driving end of the lifting cylinder body 1, a scraper mounting head 4 is provided at the end of the scraper driving rod 2, a bottom connecting tube 3 is provided on the outer side of the scraper driving rod 2, and a bottom side sealing chamber 5 is opened at the bottom end of the bottom connecting tube 3, a universal seal ring 7 and a dustproof seal ring 10 are provided in the bottom side sealing chamber 5, and a first air supply channel 11 and a second air supply channel 12 are provided between the universal seal ring 7 and the dustproof seal ring 10, nitrogen can be transported between the universal seal ring 7 and the dustproof seal ring 10 through the first air supply channel 11 and the second air supply channel 12, so that the gas entering the sealing ring spacer 8 can be transported to the bottom of the dustproof seal ring 10.

[0036] The scraper driving rod 2 can move up and down under the drive of the lifting cylinder body 1, and the downwardly transported gas can blow away the material attached to the outside of the scraper driving rod 2, and isolate the material on the outside of the dustproof sealing ring 10, which can effectively protect the dustproof sealing ring 10 and the lifting cylinder body 1, and effectively prevent the scraper driving rod 2 from driving the sticky or easily adherent material attached to the surface of the scraper installed on the scraper mounting head 4 to enter the lifting cylinder body 1, avoiding corrosion or wear of the internal parts of the lifting cylinder body 1, ensuring the long-term operation of the equipment, especially for the sticky materials and small particles of dust materials that are not completely dehydrated by the centrifuge. The blocking effect is more significant, which is convenient for users to continue to use in the future.

Claims

1. A flood seal nitrogen device, comprising a lifting cylinder body (1), characterized in that: A scraper drive rod (2) is provided at the output end of the bottom end of the lifting cylinder body (1), a bottom connecting tube (3) is provided on the outer side of the scraper drive rod (2), and the scraper drive rod (2) is slidably inserted in the bottom connecting tube (3) and passes through the bottom of the bottom connecting tube (3); A scraper mounting head (4) is installed at the bottom end of the scraper driving rod (2); a bottom side sealing cavity (5) is provided at the bottom end of the bottom connecting tube (3); a connecting retaining spring (6) is provided in the bottom side sealing cavity (5); a universal seal ring (7) is provided on the bottom side of the connecting retaining spring (6); the connecting retaining spring (6) and the universal seal ring (7) are both provided on the outside of the scraper driving rod (2); a sealing ring spacer (8) is provided on the bottom side of the universal seal ring (7); a sealing ring mounting groove (9) is provided on the bottom side wall of the bottom side sealing cavity (5); a dustproof sealing ring (10) is provided in the sealing ring mounting groove (9); and the dustproof sealing ring (10) is sleeved on the outside of the scraper driving rod (2).

2. A Variseal seal nitrogen device according to claim 1, characterized in that: The side wall of the bottom sealed cavity (5) is connected to a first air supply passage (11), and the side edge of the first air supply passage (11) is connected to a second air supply passage (12).

3. A Variseal seal nitrogen device according to claim 2, characterized in that: The open end of the first gas delivery channel (11) is provided with a first sealing plug (13), and the open end of the second gas delivery channel (12) is provided with a second sealing plug (14).

4. A Variseal seal nitrogen device according to claim 3, characterized in that: The side of the bottom connecting tube (3) is provided with a screw hole connected to the lifting cylinder body (1).

5. A Variseal seal nitrogen device according to claim 4, characterized in that: The pan seal ring (7) is in an H-shape for easy sealing.

6. A Variseal seal nitrogen device according to claim 5, characterized in that: The outer side of the end of the scraper mounting head (4) is provided with a keyway for easy connection.

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