Sealing structure of nitrogen blowback pipe

Abstract

The utility model belongs to the technical field of blowback pipe sealing, and particularly relates to a sealing structure of a nitrogen blowback pipe, which comprises a sealing outer shell, a sealing inner shell, a sealing gasket, an elastic sealing ring and a support ring, the sealing shell is of a cylindrical hollow structure, a connecting flange is arranged at one end of the sealing shell, and a plurality of bolt holes are formed in the connecting flange. The sealing inner shell is arranged in the sealing outer shell, the axes of the sealing inner shell and the sealing outer shell are collinear, the outer diameter of the sealing inner shell is smaller than the inner diameter of the sealing outer shell, and a sealing cavity is formed between the sealing inner shell and the sealing outer shell; the sealing gasket is arranged in the sealing cavity, and the section of the sealing gasket is in a hollow T shape. Through the synergistic effect and the optimal design of various sealing components, the sealing structure solves the problems that an existing sealing structure is poor in sealing performance, inconvenient to mount and dismount, uneven in sealing, prone to corrosion and the like, improves the sealing effect and the use safety of the nitrogen blowback pipe, and has wide application prospects and good economic benefits.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of backflush pipe sealing, in particular to a sealing structure of nitrogen backflush pipe. BACKGROUND

[0002] In many industrial processes, nitrogen backflush technology is widely used, for example, in the chemical industry, pharmaceutical industry, food processing industry, etc. By introducing nitrogen into the pipeline, impurities, dust or other foreign matter in the pipeline can be removed to ensure the cleanliness of the pipeline and the smooth progress of the process.

[0003] However, the existing nitrogen backflush pipe sealing structure has some shortcomings. On the one hand, some sealing structures are designed simply, only using ordinary sealing gaskets or sealing glue, which can easily lead to sealing failure during long-term use or frequent backflush operation, resulting in nitrogen leakage, which not only affects the backflush effect, but also causes energy waste, and even may cause safety hazards, such as in some environments with flammable gas, nitrogen leakage can change the composition of the environment, increasing the risk of explosion. On the other hand, the existing sealing structure is not uniform in sealing the backflush pipe, which is difficult to ensure the sealing performance in the circumferential direction of the entire backflush pipe, affecting the pressure and flow stability of nitrogen backflush, and thus affecting the cleaning effect of the pipeline, so a sealing structure of nitrogen backflush pipe needs to be developed. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the present utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] To solve the above technical problems, according to one aspect of the present utility model, the present utility model provides the following technical scheme:

[0006] A sealing structure of nitrogen backflush pipe, comprising a sealing outer shell, a sealing inner shell, a sealing gasket, an elastic sealing ring and a support ring;

[0007] The sealing outer shell is a cylindrical hollow structure, one end of which is provided with a connecting flange, and the connecting flange is provided with a plurality of bolt holes;

[0008] The sealing inner shell is arranged inside the sealing outer shell, and the axis of the sealing inner shell and the sealing outer shell is arranged in line, the outer diameter of the sealing inner shell is smaller than the inner diameter of the sealing outer shell, and a sealing cavity is formed between the sealing inner shell and the sealing outer shell;

[0009] The sealing gasket is arranged in the sealing cavity, and the cross section of the sealing gasket is in the shape of T with a hollow core, and the upper half of the sealing gasket is located between the sealing inner shell and the sealing outer shell;

[0010] The elastic sealing ring is arranged on the outer surface of the sealing inner shell and located on the inner side of the sealing gasket, the inner side of the elastic sealing ring is tightly attached to the outer side of the sealing inner shell, and the outer side of the elastic sealing ring is tightly attached to the inner side of the sealing gasket;

[0011] The support ring is fixedly arranged on the inner side wall of the sealing cavity, and the inner side of the support ring is fixed on the outer side of the lower half of the sealing gasket.

[0012] As a preferred scheme of the sealing structure of the nitrogen back blowing pipe, the sealing outer shell and the sealing inner shell are made of stainless steel.

[0013] As a preferred scheme of the sealing structure of the nitrogen back blowing pipe, a plurality of elastic sealing rings are arranged and uniformly distributed along the axial direction of the sealing inner shell, and the spacing between adjacent elastic sealing rings is equal.

[0014] As a preferred scheme of the sealing structure of the nitrogen back blowing pipe, the number of bolt holes of the connecting flange is even, and the bolt holes are uniformly distributed on the circumference of the connecting flange.

[0015] As a preferred scheme of the sealing structure of the nitrogen back blowing pipe, the outer surface of the sealing outer shell is provided with a corrosion-resistant coating, and the corrosion-resistant coating is an epoxy resin coating.

[0016] As a preferred scheme of the sealing structure of the nitrogen back blowing pipe, the support ring is annular, the inner surface of the support ring is attached to the outer surface of the lower half of the sealing gasket, and the outer surface of the support ring is attached to the inner surface of the sealing outer shell.

[0017] The sealing structure of the nitrogen back blowing pipe has the advantages that through the synergistic effect and optimal design of various sealing components, the problems of poor sealing performance, inconvenient installation and disassembly, uneven sealing, corrosion resistance and the like of the existing sealing structure are solved, the sealing effect and use safety of the nitrogen back blowing pipe are improved, and the sealing structure has wide application prospect and good economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to make the technical scheme of the embodiments of the present application clearer, the present application will be described in detail below with reference to the drawings and specific embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings. Among them:

[0019] Figure 1 is a structural schematic diagram of the present application;

[0020] Figure 2 is a structural schematic diagram of the sealing cavity of the present application;

[0021] Figure 3 is an exploded view of the present application;

[0022] Figure 4 is a structural schematic diagram of the sealing inner shell and the elastic sealing ring of the present application;

[0023] Figure 5 is a structural schematic diagram of the sealing gasket and the supporting ring of the present application;

[0024] Figure 6 is a structural schematic diagram of the sealing inner shell, the sealing gasket, the elastic sealing ring and the supporting ring of the present application. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious, specific embodiments of the present application will be described in detail below with reference to the drawings.

[0026] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0027] Secondly, the present application is described in detail in combination with the schematic diagram, in the detailed description of the embodiments of the present application, in order to facilitate the description, the sectional view of the device structure will be partially enlarged without general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application here. In addition, three-dimensional spatial dimensions including length, width and depth should be included in actual manufacture.

[0028] In order to make the purposes, technical schemes and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0029] Please refer to Figures 1-6The diagram shows a schematic representation of a sealing structure embodiment of a nitrogen backflush pipe according to this utility model. Please refer to [link / reference]. Figures 1-6 This paper provides a detailed description of the sealing structure of a nitrogen backflush pipe.

[0030] A sealing structure for a nitrogen backflush pipe includes a sealing outer shell 100, a sealing inner shell 101, a sealing gasket 102, an elastic sealing ring 104, and a support ring 105.

[0031] The sealing outer shell 100 is a cylindrical hollow structure with a connecting flange 106 at one end. The connecting flange 106 has multiple bolt holes 107 for connecting to external equipment or pipelines of the backflush pipe using appropriate screws. The sealing inner shell 101 is disposed inside the sealing outer shell 100, and the axes of the sealing inner shell 101 and the sealing outer shell 100 are collinear. The outer diameter of the sealing inner shell 101 is smaller than the inner diameter of the sealing outer shell 100, and a sealing cavity 108 is formed between the sealing inner shell 101 and the sealing outer shell 100. The sealing outer shell 100 and the sealing inner shell 101 are made of stainless steel, which has good strength and corrosion resistance and can adapt to different working environments.

[0032] The sealing gasket 102 is disposed in the sealing cavity 108. The cross-section of the sealing gasket 102 is hollow and T-shaped. The upper half of the sealing gasket 102 is located between the inner sealing shell 101 and the outer sealing shell 100, and is used to seal the gap between the two. The sealing gasket 102 is made of a material that is resistant to high pressure, wear and chemical corrosion, such as polytetrafluoroethylene, and can maintain good sealing performance under different pressure and chemical environments.

[0033] The elastic sealing ring 104 is sleeved on the outer surface of the sealing inner shell 101 and located inside the sealing gasket 102. The inner side of the elastic sealing ring 104 is in close contact with the outer side of the sealing inner shell 101, and the outer side of the elastic sealing ring 104 is in close contact with the inner side of the sealing gasket 102. The elastic sealing ring 104 is made of an elastic material, such as rubber, which will undergo elastic deformation when squeezed by the sealing outer shell 100 and the sealing inner shell 101, filling the tiny irregular gaps between the sealing inner shell 101 and the sealing outer shell 100, and further enhancing the sealing effect.

[0034] The support ring 105 is fixedly disposed in the sealing cavity 108. The inner side of the support ring 105 is fixed on the outer side of the lower half of the sealing gasket 102. The support ring 105 is used to support the sealing gasket 102, prevent the sealing gasket 102 from being excessively deformed under pressure, ensure that the sealing gasket 102 is evenly stressed, and maintain long-term stable sealing performance.

[0035] The elastic sealing rings 104 are arranged in plurality and evenly distributed along the axial direction of the sealing inner shell 101, and the intervals between adjacent elastic sealing rings 104 are equal, so that the sealing effect is more uniform throughout the sealing length, avoiding the occurrence of local poor sealing, and providing reliable sealing under different working pressures, improving the overall sealing performance and adaptability of the sealing structure.

[0036] The bolt holes 107 of the connecting flange 106 are in even number and evenly distributed on the circumference of the connecting flange 106, and such evenly distributed bolt holes 107 can ensure that the sealing structure is evenly stressed when connected with external equipment or pipelines, avoiding sealing failure caused by uneven stress, and facilitating the operator to select the appropriate number of fastening bolts for fastening according to the actual situation, so that the connection is more firm and stable.

[0037] The outer surface of the sealing outer shell 100 is provided with a corrosion-resistant coating, which is an epoxy resin coating, which can prevent the sealing outer shell 100 from being corroded in harsh environments, prolonging the service life of the sealing structure, especially in environments containing corrosive substances such as acids and bases, effectively protecting the sealing outer shell 100 and ensuring the integrity and sealing performance of the sealing structure.

[0038] The support ring 105 is annular, the inner surface of the support ring 105 is in close contact with the outer surface of the lower half of the sealing gasket 102, and the outer surface of the support ring 105 is in close contact with the inner surface of the sealing outer shell 100, and the deformation amount of the sealing gasket 102 is appropriately limited by the support ring 105, so that the sealing gasket 102 uniformly bears the pressure from the sealing outer shell 100 and the sealing inner shell 101, ensuring that the sealing effect of the sealing gasket 102 is uniform and consistent, and improving the reliability of the sealing structure during long-term use.

[0039] Although the utility model has been described above with reference to the embodiments, various improvements can be made and equivalent parts can be replaced without departing from the scope of the utility model. In particular, as long as there is no structural conflict, the features in the embodiments disclosed by the utility model can be combined in any way, and the combinations are not exhaustively described in the specification only for the purpose of saving space and resources. Therefore, the utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A seal structure of a nitrogen backflush tube, characterized by, The utility model relates to a sealing device, including sealed shell (100), sealed inner shell (101), sealing gasket (102), elastic sealing ring (104) and support ring (105); The sealed shell (100) is cylindrical hollow structure, is provided with connecting flange (106) at one end, is equipped with a plurality of bolt holes (107) on connecting flange (106); The sealed inner shell (101) is arranged inside sealed shell (100), and the axis of sealed inner shell (101) and sealed shell (100) is arranged in line, the outer diameter of sealed inner shell (101) is less than the inner diameter of sealed shell (100), and the sealed cavity (108) is formed between sealed inner shell (101) and sealed shell (100); The sealing gasket (102) is arranged in the sealed cavity (108), the cross section of the sealing gasket (102) is T-shaped with a hollow core, and the upper half of the sealing gasket (102) is located between the sealed inner shell (101) and the sealed shell (100); The elastic sealing ring (104) is sleeved on the outer surface of the sealed inner shell (101) and located inside the sealing gasket (102), the inner side of the elastic sealing ring (104) is tightly attached to the outer side of the sealed inner shell (101), and the outer side of the elastic sealing ring (104) is tightly attached to the inner side of the sealing gasket (102); The support ring (105) is fixedly arranged on the inner side wall of the sealed cavity (108), and the inner side of the support ring (105) is fixed on the outer side of the lower half of the sealing gasket (102).

2. The sealing structure of a nitrogen backflush tube according to claim 1, characterized in that: The sealed shell (100) and the sealed inner shell (101) are made of stainless steel.

3. The sealing structure of a nitrogen backflush tube according to claim 1, characterized in that: The elastic sealing ring (104) is provided with a plurality of elastic sealing rings (104), and the elastic sealing rings (104) are uniformly distributed along the axial direction of the sealed inner shell (101), and the spacing between adjacent elastic sealing rings (104) is equal.

4. The sealing structure of a nitrogen backflush tube according to claim 1, characterized in that: The number of bolt holes (107) of the connecting flange (106) is even, and the bolt holes (107) are uniformly distributed on the circumference of the connecting flange (106).

5. The seal structure of a nitrogen backflush tube according to claim 1, characterized by: The outer surface of the sealed shell (100) is provided with a corrosion-resistant coating, and the corrosion-resistant coating is an epoxy resin coating.

6. The seal structure of a nitrogen backflush tube according to claim 1, characterized by: The support ring (105) is annular, the inner surface of the support ring (105) is attached to the outer surface of the lower half of the sealing gasket (102), and the outer surface of the support ring (105) is attached to the inner surface of the sealed shell (100).

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