A delivery apparatus for a pure hydrogen pipeline

Abstract

The utility model discloses a conveying equipment for pure hydrogen pipeline, including sleeve, gas pipeline, sleeve both ends insert gas pipeline, the inside middle part of sleeve is set to middle section, and the both ends of middle section are sequentially provided with connecting section, folding section, sealing section, annular opening, the cavity diameter of connecting section is greater than middle section, and the sliding connection connecting ring is in connecting section, and the side fixed connecting ring sealing gasket of connecting ring is away from middle section, set to be inclined plane in folding section, the cavity diameter of sealing section is greater than annular opening, and ring sealing gasket is folded in this section and realizes sealing, and gas pipeline is screwed on connecting ring. The utility model discloses through setting connecting section, folding section, sealing section in sleeve, thereby makes ring sealing gasket inboard close gas pipeline, and the outside is wrapped in the extrusion of connecting ring outside and sleeve, even if conveying pressure fluctuation, and the gas pressure promotes connecting ring to move outward, will further compress ring sealing gasket to avoid leakage, and connecting ring and sleeve can absorb and compensate the stress change of gas pressure.

Description

Technical Field

[0001] This utility model relates to the field of pure hydrogen pipeline transportation, specifically a transportation device for pure hydrogen pipelines. Background Technology

[0002] Hydrogen energy, with its wide availability and clean, carbon-free characteristics, is widely regarded as a key medium connecting the clean transformation of traditional fossil energy with the large-scale consumption of renewable energy.

[0003] Large-scale, long-distance hydrogen transportation relies heavily on pipeline systems, and the reliability and sealing of their connection structures are crucial for ensuring overall transportation safety. Currently, the connection methods between pipe sections in hydrogen transportation pipelines widely used in engineering practice remain relatively traditional and simplistic. A typical approach involves using threaded structures at the ends of pipe sections for screw-on connections, supplemented by bolts for radial tightening. This connection method is essentially a rigid connection. However, pressure fluctuations and pulsations are common in hydrogen transportation operations, and these dynamic loads continuously act on the pipeline and its connections. Rigid connection structures struggle to effectively absorb and compensate for such periodic stress changes, potentially leading to fretting wear, loosening, or even fatigue cracks in the threaded pairs over long-term operation.

[0004] More importantly, this type of seal, which relies on threaded connections and bolt tightening, has limited sealing effectiveness. Hydrogen, as the gas with the smallest known molecular weight and lowest viscosity, has extremely high permeability and diffusion capacity, far exceeding that of conventional fuels such as natural gas. Even in leaks occurring at the micrometer level, hydrogen can easily escape. Scientific research and engineering practice have shown that hydrogen reaches its explosive limit in a wide range of concentrations in air, from 4.0% to 75.6%, at which point it will ignite or even explode upon contact with an ignition source. Therefore, even a small amount of hydrogen leakage at pipe connections due to vibration, hydrogen embrittlement of materials, or poor sealing can rapidly accumulate in confined or poorly ventilated spaces, forming an explosive mixture that ultimately poses a serious threat to human life and the safety of surrounding property and facilities.

[0005] In summary, the rigid threaded connection method commonly used in existing hydrogen pipelines is not structurally adaptable to dynamic pressure loads, and its inherent sealing performance is insufficient to meet the long-term leak prevention requirements of hydrogen, a highly permeable medium. This constitutes a technical shortcoming that urgently needs to be addressed in the field of safe hydrogen transportation. Utility Model Content

[0006] The purpose of this invention is to provide a conveying device for pure hydrogen pipelines to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a conveying device for pure hydrogen pipelines, comprising a sleeve and a gas delivery pipe, wherein both ends of the sleeve are inserted into the gas delivery pipe; The inner middle part of the sleeve is set as a middle section, and the two ends of the middle section are respectively provided with a connecting section, a folding section, a sealing section, and an annular opening; The central section is designed to allow airflow to pass through; The cavity diameter of the connecting section is larger than that of the middle section, and a vertical cross section is formed between the connecting section and the middle section. A connecting ring is slidably connected in the connecting section. The connecting ring cannot cross the vertical cross section. A sealing gasket for the connecting ring is fixed on the side of the connecting ring away from the middle section. The folded section is designed with an inclined surface, and the end of the inclined surface away from the connecting section has a smaller diameter, so that the ring seal gasket deforms when it passes through this section. The cavity diameter of the sealing section is larger than that of the annular opening, and a vertical cross section is formed between the sealing section and the annular opening. The connecting ring and the ring sealing gasket cannot cross this vertical cross section, and the ring sealing gasket is folded in this section to achieve a seal. The outer diameter of the connecting ring is larger than that of the middle section but not larger than that of the sealing section, and the outer diameter of the ring sealing gasket is larger than that of the connecting ring. The gas transmission pipe is threaded onto the connecting ring.

[0008] Preferably, the sleeve is further fixedly connected to a pipe anti-collision pad on the vertical end face of the connecting section.

[0009] Preferably, the connecting ring is fixed with a connecting ring anti-collision pad on the side away from the ring sealing gasket.

[0010] Preferably, the connecting section is provided with a supporting rubber ring, which is sleeved on the outside of the connecting ring to provide support for the connecting ring.

[0011] Preferably, a pipe sealing gasket is also fixedly connected to the vertical end face of the sealing section of the sleeve.

[0012] Preferably, the diameter of the annular opening is larger than that of the gas transmission pipe.

[0013] Preferably, the gas pipeline port is provided with a chamfered edge.

[0014] Preferably, the ring seal is annular.

[0015] Preferably, the portion of the outer side of the ring sealing gasket that is larger than the outer diameter of the connecting ring is configured as several sealing blocks to facilitate folding.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting a connecting section, a folding section, and a sealing section in the sleeve, the inner side of the ring sealing gasket is tightly attached to the gas delivery pipe, and the outer side is wrapped around the connecting ring and squeezed against the sleeve. Even if the delivery pressure fluctuates, the air pressure pushes the connecting ring to move outward, which will further compress the ring sealing gasket and thus prevent leakage. Moreover, the connection between the connecting ring and the sleeve is not rigid, which can effectively absorb and compensate for the periodic stress changes of the air pressure, and avoid fretting wear, loosening, or even fatigue cracks in the threaded pair, thereby ensuring the connection and sealing effects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the sleeve of this utility model; Figure 3 for Figure 2 Enlarged view of a portion at point A; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 This is a schematic diagram of the structure of this utility model after installation; Figure 6 for Figure 5 A magnified view of section B; Figure 7 This is a schematic diagram of the structure of Embodiment 1 of the ring sealing gasket of this utility model; Figure 8 This is a schematic diagram of the structure of Embodiment 2 of the ring sealing gasket of this utility model; Figure 9 This is a structural schematic diagram of the ring seal gasket of embodiment 2 of this utility model in use.

[0018] In the diagram: 1. Sleeve, 101. Middle section, 102. Connecting section, 103. Folded section, 104. Sealing section, 105. Annular opening, 2. Connecting ring, 3. Ring sealing gasket, 301. Sealing block, 4. Support rubber ring, 5. Ring anti-collision pad, 6. Pipe anti-collision pad, 7. Pipe sealing gasket, 8. Gas transmission pipe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1: Please refer to Figure 1-7To address the issue of limited sealing performance due to rigid connections in hydrogen pipelines, a connecting section 102, a folding section 103, and a sealing section 104 are incorporated into the sleeve 1. This ensures that the inner side of the ring sealing gasket 3 is tightly pressed against the gas pipeline 8, while the outer side wraps around the connecting ring 2, creating compression with the sleeve 1. Even if the delivery pressure fluctuates, the gas pressure pushes the connecting ring 2 outward, further compressing the ring sealing gasket 3 and preventing leakage. Furthermore, since the connection between the connecting ring 2 and the sleeve 1 is not rigid, it effectively absorbs and compensates for periodic stress changes in gas pressure, preventing fretting wear, loosening, or even fatigue cracks in the threaded pair, thus ensuring both connection and sealing performance. This utility model provides a technical solution: a conveying device for pure hydrogen pipelines, including a sleeve 1 and a gas transmission pipe 8, with both ends of the sleeve 1 inserted into the gas transmission pipe 8; the middle part of the sleeve 1 is configured as a middle section 101, and both ends of the middle section 101 are sequentially provided with a connecting section 102, a folding section 103, a sealing section 104, and an annular opening 105; the middle section 101 is for gas flow; the cavity diameter of the connecting section 102 is larger than that of the middle section 101, and a vertical cross section is formed between the connecting section 102 and the middle section 101; a connecting ring 2 is slidably connected in the connecting section 102, and the connecting ring 2 cannot cross the vertical cross section; a connecting ring sealing gasket 3 is fixed on the side of the connecting ring 2 away from the middle section 101; folding section 102 103 104 105 105 106 107 108 109 100 101 100 101 100 101 100 101 100 101 100 101 102 103 104 105 106 107 108 109 101 103 104 105 106 107 108 109 101 106 107 108 109 ... The overlapping section 103 is designed as an inclined surface, with a smaller diameter at the end away from the connecting section 102, causing the annular sealing gasket 3 to deform when passing through this section. The cavity diameter of the sealing section 104 is larger than that of the annular opening 105, forming a vertical cross-section between the sealing section 104 and the annular opening 105. The connecting ring 2 and the annular sealing gasket 3 cannot cross this vertical cross-section, and the annular sealing gasket 3 folds in this section to achieve a seal. The outer diameter of the connecting ring 2 is larger than that of the middle section 101 but not larger than that of the sealing section 104. The outer diameter of the annular sealing gasket 3 is larger than that of the connecting ring 2, and the inner diameter of the annular sealing gasket 3 is not larger than that of the connecting ring 2, thus ensuring that the annular sealing gasket 3 tightly wraps around the gas supply pipe 8. The gas supply pipe 8 is threadedly connected to the connecting ring 2. A pipe anti-collision pad 6 is also fixedly connected to the vertical end face of the connecting section 102 on the sleeve 1. A connecting ring anti-collision pad 5 is fixed to the side of the connecting ring 2 away from the annular sealing gasket 3. A supporting rubber ring 4 is provided in the connecting section 102. The supporting rubber ring 4 is sleeved on the outside of the connecting ring 2, and plays a supporting role for the connecting ring 2. The interface of the supporting rubber ring 4 is circular. A pipe sealing gasket 7 is also fixedly connected to the vertical end face of the sleeve 1 on the sealing section 104. The diameter of the annular opening 105 is larger than that of the gas transmission pipe 8. The end of the gas transmission pipe 8 is provided with a chamfered edge. The annular sealing gasket 3 is annular.When not in use, the connecting ring 2 is located in the connecting section 102, and the supporting rubber ring 4 is supported outside the connecting ring 2. During connection, the gas pipe 8 is inserted into the sleeve 1. To facilitate the passage of the ring sealing gasket 3, the end of the gas pipe 8 is chamfered. The gas pipe 8 is inserted inward and rotated to make it threaded onto the connecting ring 2. During this process, the ring anti-collision gasket 5 and the pipe anti-collision gasket 6 act as anti-collision pads, preventing rigid collisions between the sleeve 1 and the connecting ring 2. At this time, the ring sealing gasket 3 is tightened onto the gas pipe 8. For further sealing, it can also be... The gas supply pipe 8 is tightened with bolts or sealed with sealant, and then the gas supply pipe 8 is pulled outward. The gas supply pipe 8 drives the connecting ring 2 to move, and the connecting ring 2 drives the ring sealing gasket 3 to move. The ring sealing gasket 3 is in a stretched state in the connecting section 102. When the ring sealing gasket 3 reaches the folding section 103, the ring sealing gasket 3 begins to bend towards the middle section 101. Until it enters the sealing section 104, the ring sealing gasket 3 is squeezed between the sleeve 1 and the connecting ring 2 and wraps the connecting ring 2, forming as shown. Figure 5-6 The L-shape achieves a seal. The greater the gas pressure, the more it pushes the connecting ring 2 to press the sealing gasket 3, thus ensuring a seal.

[0021] Example 2: Please refer to Figure 8-9 To facilitate the wrapping of the connecting ring 2 by the annular sealing gasket 3 and prevent repeated folding of the annular sealing gasket 3, sealing blocks 301 are provided. The portion of the annular sealing gasket 3 larger than the outer diameter of the connecting ring 2 is provided with several sealing blocks 301 to facilitate folding. The remaining features are the same as in Embodiment 1. Several sealing blocks 301 are joined together to form a cylinder, thereby wrapping the connecting ring 2 to achieve a seal.

[0022] 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 conveying device for pure hydrogen pipelines, comprising a casing (1) and a gas transmission pipe (8), characterized in that: Gas pipes (8) are inserted into both ends of the sleeve (1); The sleeve (1) is configured with a middle section (101) in the middle part, and the two ends of the middle section (101) are provided with a connecting section (102), a folding section (103), a sealing section (104), and an annular opening (105) in sequence. The middle section (101) is designed to allow airflow to pass through; The cavity diameter of the connecting section (102) is larger than that of the middle section (101). A vertical cross section is formed between the connecting section (102) and the middle section (101). A connecting ring (2) is slidably connected in the connecting section (102). The connecting ring (2) cannot cross the vertical cross section. A connecting ring sealing gasket (3) is fixed on the side of the connecting ring (2) away from the middle section (101). The folded section (103) is set as an inclined surface, and the end of the inclined surface away from the connecting section (102) has a small diameter, and the ring seal gasket (3) deforms when it passes through the section; The cavity diameter of the sealing section (104) is larger than that of the annular opening (105). A vertical cross section is formed between the sealing section (104) and the annular opening (105). The connecting ring (2) and the ring sealing gasket (3) cannot cross this vertical cross section. The ring sealing gasket (3) is folded in this section to achieve sealing. The outer diameter of the connecting ring (2) is greater than that of the middle section (101) but not greater than that of the sealing section (104), and the outer diameter of the ring sealing gasket (3) is greater than that of the connecting ring (2); The gas pipeline (8) is threaded onto the connecting ring (2).

2. The conveying equipment for pure hydrogen pipelines according to claim 1, characterized in that: The sleeve (1) is also fixedly connected to a pipe anti-collision pad (6) on the vertical end face of the connecting section (102).

3. The conveying equipment for pure hydrogen pipelines according to claim 1, characterized in that: The connecting ring (2) is fixed with the connecting ring anti-collision pad (5) on the side away from the ring sealing pad (3).

4. The conveying equipment for pure hydrogen pipelines according to claim 1, characterized in that: The connecting section (102) is provided with a support rubber ring (4), which is sleeved on the outside of the connecting ring (2) and plays a supporting role for the connecting ring (2).

5. The conveying equipment for pure hydrogen pipelines according to claim 1, characterized in that: The sleeve (1) is also fixedly connected to a pipe sealing gasket (7) on the vertical end face of the sealing section (104).

6. The conveying equipment for pure hydrogen pipelines according to claim 1, characterized in that: The diameter of the annular opening (105) is larger than that of the gas transmission pipe (8).

7. The conveying equipment for pure hydrogen pipelines according to claim 1, characterized in that: The gas pipeline (8) has a chamfered edge at the port.

8. The conveying equipment for pure hydrogen pipelines according to claim 1, characterized in that: The annular sealing gasket (3) is annular.

9. A conveying device for pure hydrogen pipelines according to claim 1, characterized in that: The outer portion of the ring sealing gasket (3) that is larger than the outer diameter of the connecting ring (2) is configured with several sealing blocks (301) for folding.

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