Sealing structure of nitrogen blowback pipe

Abstract

The utility model discloses a sealing structure of a nitrogen back-blowing pipe, which structurally comprises a nitrogen head, the nitrogen back-blowing pipe, a sealing assembly and a connecting mechanism, the nitrogen head is movably connected with the nitrogen back-blowing pipe in an embedded manner, and the sealing assembly is arranged at the movable joint of the nitrogen head and the nitrogen back-blowing pipe; the multiple connecting mechanisms are sequentially connected with the nitrogen head, the sealing assembly and the nitrogen back-blowing pipe, the nitrogen head, the sealing assembly and the nitrogen back-blowing pipe are fastened, the sealing assembly is arranged between the nitrogen head and the nitrogen back-blowing pipe, and the nitrogen head and the nitrogen back-blowing pipe are pressed through the pressing bolt, so that a tiny gap between the pressing plate and the sealing shell is filled, and the sealing effect is improved. The connection sealing performance is guaranteed, the structure is simple, production and use are convenient, meanwhile, the spiral spring gasket and the nut are arranged at the end of the compression bolt, and the connection sealing performance is further improved. The utility model belongs to the field of nitrogen blowback pipes, and particularly relates to a sealing structure of a nitrogen blowback pipe.

Description

Technical Field

[0001] This utility model belongs to the field of nitrogen backflush pipes, specifically referring to a sealing structure for a nitrogen backflush pipe. Background Technology

[0002] In industries such as chemical, petroleum, and natural gas, nitrogen backflush pipes are widely used in pipeline cleaning and purging processes. Due to the inert nature of nitrogen, it is often used to prevent oxidation or explosion of residues inside pipelines. However, traditional sealing structures are prone to leakage under high pressure and high temperature environments, leading to nitrogen waste, environmental pollution, and even safety hazards. In recent years, with the improvement of industrial automation, higher requirements have been placed on the reliability, durability, and sealing performance of sealing structures.

[0003] Currently, the common nitrogen backflush pipe sealing structure mainly consists of a nitrogen head and a nitrogen backflush pipe connected by threads, with a rubber sealing ring installed at the connection. After long-term use, the rubber material is prone to aging, and the individual threaded connection mechanism is prone to wear and loosening, resulting in a decrease in sealing performance. Utility Model Content

[0004] The technical problems to be solved by this utility model are the performance degradation of the sealing structure after long-term use and the loosening of the connecting mechanism after long-term use.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: The sealing structure of the nitrogen backflush pipe proposed by this utility model includes a nitrogen head, a nitrogen backflush pipe, a sealing assembly, and a connecting mechanism:

[0006] The nitrogen head and the nitrogen backflush tube are movably fitted together, and the sealing assembly is located at the movable connection between the nitrogen head and the nitrogen backflush tube.

[0007] The connecting mechanism is provided in multiple sets, and the connecting mechanism sequentially connects the nitrogen head, the sealing component and the nitrogen backflush pipe, and fastens the nitrogen head, the sealing component and the nitrogen backflush pipe.

[0008] Furthermore, a pressure plate is fixedly provided on the outer side of the nitrogen head end, and a sealing shell is fixedly provided on the end of the nitrogen backflush pipe. The pressure plate and the sealing shell are slidably fitted together internally.

[0009] Furthermore, the sealing assembly includes a sealing ring and a sealing gasket. The sealing ring has an L-shaped cross-section and is fitted onto the nitrogen head and the bottom of the pressure plate, and is movably fitted and connected to the nitrogen head and the pressure plate.

[0010] Furthermore, the sealing gasket is connected to the bottom inner side of the sealing housing, and the sealing gasket and the sealing ring are movably fitted together.

[0011] Furthermore, the connecting mechanism includes a clamping bolt, which sequentially threaded through the pressure plate, sealing ring, sealing gasket, and sealing housing.

[0012] Furthermore, the end of the clamping bolt is threaded with a nut, and a helical spring washer is fitted onto the end of the clamping bolt, with the helical spring washer located between the sealing housing and the nut.

[0013] Furthermore, the pressure plate and the sealing housing are made of stainless steel.

[0014] Furthermore, the sealing ring is made of polytetrafluoroethylene (PTFE) material, and the sealing gasket is made of graphite metal composite gasket with a thickness of 1-2 mm.

[0015] The beneficial effects of this utility model by adopting the above structure are as follows:

[0016] The sealing structure of the nitrogen backflush pipe proposed in this solution fills the tiny gap between the pressure plate and the sealing shell by setting a sealing component between the nitrogen head and the nitrogen backflush pipe and tightening it with a clamping bolt, thus ensuring the connection seal. The structure is simple and convenient to produce and use. At the same time, a helical spring washer and a nut are set at the end of the clamping bolt to further increase the connection seal. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first overall structure of the present invention;

[0018] Figure 2 This is an exploded view of the overall structure of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the present invention;

[0020] Figure 4 This is a schematic diagram of the second overall structure of the present invention.

[0021] Among them, 1. Nitrogen head, 101. Pressure plate, 2. Nitrogen backflush pipe, 201. Sealing shell, 3. Sealing assembly, 301. Sealing ring, 302. Sealing gasket, 4. Connecting mechanism, 401. Clamping bolt, 402. Helical spring washer, 403. Nut.

[0022] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-4 As shown, the present invention proposes a sealing structure for a nitrogen backflush pipe, including a nitrogen head 1, a nitrogen backflush pipe 2, a sealing component 3, and a connecting mechanism 4: the nitrogen head 1 and the nitrogen backflush pipe 2 are movably fitted together, the sealing component 3 is located at the movable connection between the nitrogen head 1 and the nitrogen backflush pipe 2, a pressure plate 101 is fixedly provided on the outer side of the end of the nitrogen head 1, and a sealing shell 201 is fixedly provided on the end of the nitrogen backflush pipe 2. The pressure plate 101 and the sealing shell 201 are slidably fitted together, and the pressure plate 101 and the sealing shell 201 are made of stainless steel.

[0025] like Figure 1-3 As shown, the sealing assembly 3 includes a sealing ring 301 and a sealing gasket 302. The sealing ring 301 has an L-shaped cross-section and is fitted onto the bottom of the nitrogen head 1 and the pressure plate 101, and is movably fitted to the nitrogen head 1 and the pressure plate 101. The sealing gasket 302 is connected to the bottom inner side of the sealing housing 201, and is movably fitted to the sealing ring 301. The sealing ring 301 is made of polytetrafluoroethylene (PTFE) material, and the sealing gasket 302 is made of graphite metal composite gasket with a thickness of 1-2 mm.

[0026] like Figure 1-4 As shown, the connecting mechanism 4 has multiple sets. The connecting mechanism 4 sequentially connects the nitrogen head 1, the sealing component 3, and the nitrogen backflush pipe 2, and fastens the nitrogen head 1, the sealing component 3, and the nitrogen backflush pipe 2. The connecting mechanism 4 includes a clamping bolt 401, which sequentially passes through the pressure plate 101, the sealing ring 301, the sealing gasket 302, and the sealing housing 201. The end of the clamping bolt 401 is threaded with a nut 403, and a helical spring washer 402 is fitted on the end of the clamping bolt 401. The helical spring washer 402 is located between the sealing housing 201 and the nut 403, and increases the friction between the threads through continuous elastic tension to improve the anti-loosening effect.

[0027] In practical use, the sealing gasket 302 is placed inside the sealing housing 201, the sealing ring 301 is aligned with the lower opening of the pressure plate 101, and the pressure plate 101 with the sealing ring 301 is aligned with the sealing housing 201. The pressure plate 101, sealing ring 301, sealing gasket 302, and sealing housing 201 are sequentially threaded together using the clamping bolt 401. When the clamping bolt 401 is tightened, the sealing gasket 302 is pressed onto the sealing ring 301, forming a multi-layer sealing structure. The elastic deformation of the sealing ring 301 fills the tiny gap between the pressure plate 101 and the sealing housing 201, while the high temperature resistance of the graphite metal composite gasket ensures the stability of the sealing performance. A helical spring washer 402 is fitted onto the end of the clamping bolt 401, and the nut 403 is tightened to increase the connection stability.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A seal structure of a nitrogen backflush tube, characterized by, Including nitrogen head, nitrogen back flushing pipe, sealing assembly and connecting mechanism: The nitrogen head and the nitrogen back flushing pipe are movably connected, and the sealing assembly is arranged at the movable connection position of the nitrogen head and the nitrogen back flushing pipe. The connecting mechanism is provided with multiple groups, and the connecting mechanism is sequentially connected with the nitrogen head, the sealing assembly and the nitrogen back flushing pipe to fasten the nitrogen head, the sealing assembly and the nitrogen back flushing pipe.

2. The sealing structure of a nitrogen backflush pipe according to claim 1, characterized in that: The nitrogen head is provided with a pressing plate outside the end, the nitrogen back flushing pipe is provided with a sealing shell at the end, and the pressing plate and the sealing shell are movably connected inside.

3. The sealing structure of a nitrogen backflush tube according to claim 2, characterized in that: The sealing assembly comprises a sealing ring and a sealing gasket, the cross section of the sealing ring is provided with an L-shaped structure, the sealing ring is sleeved on the nitrogen head and the bottom of the pressing plate, and the nitrogen head and the pressing plate are movably connected.

4. The sealing structure of a nitrogen backflush tube according to claim 3, characterized in that: The sealing gasket is connected with the bottom of the sealing shell, and the sealing gasket and the sealing ring are movably connected.

5. The sealing structure of a nitrogen backflush tube according to claim 4, characterized in that: The connecting mechanism comprises a pressing bolt, and the pressing bolt is sequentially screwed through the pressing plate, the sealing ring, the sealing gasket and the sealing shell.

6. The sealing structure of a nitrogen backflush tube according to claim 5, characterized in that: The end of the pressing bolt is threadedly connected with a nut, the end of the pressing bolt is sleeved with a spiral spring washer, and the spiral spring washer is located between the sealing shell and the nut.

7. The sealing structure of a nitrogen backflush tube according to claim 6, characterized in that: The pressing plate and the sealing shell are made of stainless steel.

8. The sealing structure of a nitrogen backflush tube according to claim 7, characterized in that: The sealing ring is made of polytetrafluoroethylene material, and the sealing gasket is made of graphite metal composite gasket with a thickness of 1-2mm.

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