A high pressure ct taper thread seal joint for a hydrogen compressor outlet

Abstract

The utility model relates to the technical field of hydrogen compressor accessories, specifically, a high pressure CT taper thread sealing joint of hydrogen compressor export, including the male and female that cooperate with each other, to make the male can be inserted in the female inside, one end of the male is provided with the conical head, the female cooperation conical head is provided with the taper slot, to make the male inserts in the female inside when the conical head is attached to the groove wall of taper slot, the taper surface of conical head still is provided with the elastic sealing ring, to make the male inserts in the female inside when sealing ring is attached to the inner wall of taper slot. The first sealing is realized through the attachment of conical head and taper slot, still sets up the sealing ring and carries out the second sealing. When the clearance of conical head and taper slot is produced because of temperature change, still can be sealed through the sealing ring, and further avoids the condition of hydrogen leakage when temperature change.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen compressor accessories, and more specifically, to a high-pressure CT conical threaded sealing joint for the outlet of a hydrogen compressor. Background Technology

[0002] Against the backdrop of the rapid development of the hydrogen energy industry, hydrogen compression systems, as core equipment in hydrogen storage and transportation, rely heavily on the sealing and safety of their pipeline connections to determine the overall reliability of the system. High-pressure CT tapered threaded sealing joints, with their unique structural design, have gained widespread application in this field. These joints achieve a reliable line seal through a high-precision, tight fit between the outer tapered surface of the metal pipe and the inner tapered surface of the joint body. This not only effectively prevents hydrogen leakage under high-pressure conditions but also possesses excellent vibration and loosening resistance, adapting to the vibration environment during compressor operation. Furthermore, it simplifies installation procedures and reduces on-site construction difficulty, thus becoming the preferred component for pipeline connections in hydrogen compression systems.

[0003] However, in the critical operating scenario of the hydrogen compressor outlet pipeline, the medium temperature often fluctuates drastically during compressor start-up, shutdown, and load adjustments. Especially during system cooling, the differences in thermal conductivity and structural dimensions between the joint body and the sealing pipeline create a significant thermal resistance effect, causing the temperature change rate of the CT cone-shaped joint body to lag significantly behind that of the CT cone-shaped sealing pipeline. This asynchrony in temperature change leads to differences in thermal deformation of the originally tightly fitted metal cone-shaped sealing pair, resulting in a tiny gap between the sealing surfaces. As the cooling process continues, this gap gradually widens, compromising the integrity of the original line seal structure and ultimately causing hydrogen leakage.

[0004] Hydrogen is a flammable and explosive gas; even a small leak can trigger serious safety accidents such as fires and explosions, posing a significant threat to human life and property. Currently, existing high-pressure CT conical threaded sealing joints generally rely solely on the initial fit between the metal conical surfaces to achieve a sealing function. They lack corresponding compensation or adaptive structures designed for conditions with drastic temperature changes, failing to effectively eliminate sealing gaps caused by thermal deformation differences. Consequently, in scenarios with frequent temperature fluctuations, such as hydrogen compressor outlet pipelines, their sealing reliability and safety are insufficient to meet practical application requirements. Therefore, an improved solution to address these technical problems is urgently needed. Utility Model Content

[0005] The purpose of this invention is to provide a high-pressure CT conical threaded sealing joint at the outlet of a hydrogen compressor, which prevents leakage due to temperature changes.

[0006] This utility model is achieved through the following technical solution:

[0007] A high-pressure CT conical threaded sealing joint for the outlet of a hydrogen compressor includes a male and a female connector that mate with each other, allowing the male connector to be inserted into the female connector. One end of the male connector is provided with a conical head. The female connector is provided with a conical groove that mates with the conical head, so that when the male connector is inserted into the female connector, the conical head fits against the groove wall. The conical surface of the conical head is also provided with an elastic sealing ring, so that when the male connector is inserted into the female connector, the sealing ring fits against the inner wall of the conical groove.

[0008] Furthermore, the conical surface of the conical head is provided with an annular groove along the circumference of the conical head; the sealing ring is fitted inside the annular groove and protrudes from the opening of the annular groove.

[0009] Furthermore, the sealing ring is made of perfluoroether rubber.

[0010] Furthermore, it also includes a retaining ring and a fastening plug; the retaining ring is threaded to the outer wall of the male connector; the fastening plug is annular and sleeved on the outside of the male connector; the fastening plug is provided with external threads so that the fastening plug is threaded to the inside of the female connector, so that when the fastening plug is tightened on the female connector, it pushes the retaining ring to move into the inside of the female connector.

[0011] Furthermore, the retaining ring and the male connector are provided with a left-hand thread; the fastening plug and the female connector are provided with a right-hand thread.

[0012] Furthermore, the angle between the wall of the conical groove and the axis of the male head is 0.5 degrees larger than the angle between the outer wall of the conical head and the axis of the male head.

[0013] Furthermore, both the male and female connectors are made of 316L stainless steel.

[0014] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0015] This invention relates to a high-pressure CT conical threaded sealing joint at the outlet of a hydrogen compressor. The first layer of sealing is achieved through the fit between the conical head and the conical groove, and a second layer is provided by a sealing ring. Even when gaps arise between the conical head and the conical groove due to temperature changes, the sealing ring can still maintain a seal, thus preventing hydrogen leakage caused by temperature fluctuations. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is an isometric view of the high-pressure CT conical threaded sealing joint at the outlet of a hydrogen compressor.

[0018] Figure 2 This is a cross-sectional view of the high-pressure CT conical threaded sealing joint at the outlet of a hydrogen compressor.

[0019] Figure 3 for Figure 2 Enlarged view of point a in the middle.

[0020] Icons: 1-Male head, 2-Female head, 3-Conical head, 4-Conical groove, 5-Annular groove, 6-Sealing ring, 7-Snap ring, 8-Fasting plug. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Example:

[0023] like Figures 1-3 As shown, this embodiment discloses a high-pressure CT conical threaded sealing joint for the outlet of a hydrogen compressor. It aims to solve the technical problem of hydrogen leakage caused by the difference in thermal deformation between the joint body and the sealed pipeline due to the drastic temperature fluctuation of the hydrogen compressor outlet pipeline. The sealing reliability and safety are improved by optimizing the structural design, and it is suitable for pipeline connection scenarios with high pressure and frequent temperature fluctuations, such as the outlet of a hydrogen compressor.

[0024] This sealing joint mainly consists of a male connector 1 and a female connector 2 that mate with each other. The male connector 1 can be inserted into the female connector 2 to achieve pipeline connection and sealing. The female connector 2 is generally connected to the compressor, while the male connector 1 is generally used to connect pipelines to output the compressed gas from the compressor. One end of the male connector 1 has an integrally formed conical head 3, and the inside of the female connector 2 has a conical groove 4 machined to fit this conical head 3. When the male connector 1 is inserted into the female connector 2, the outer wall of the conical head 3 can fit tightly against the groove wall of the conical groove 4, forming an initial metal conical surface sealing structure. To further improve the sealing performance and compensate for sealing gaps caused by temperature changes, an elastic sealing ring 6 is also provided on the conical surface of the conical head 3. After the male connector 1 and the female connector 2 are assembled, the sealing ring 6 can be compressed and deformed, thus simultaneously fitting against the inner wall of the conical groove 4, forming a dual sealing structure of "metal seal + rubber seal". Even if subsequent temperature changes cause tiny gaps to form between the metal mating surfaces of the conical head 3 and the conical groove 4, the pre-compressed and deformed sealing ring 6 can still maintain tight contact with the inner wall of the conical groove 4, thereby effectively blocking the hydrogen leakage channel.

[0025] To ensure stable installation and fixation of the sealing ring 6, an annular groove 5 is machined circumferentially on the conical surface of the conical head 3. For example... Figure 3 As shown, the sealing ring 6 is fitted inside the annular groove 5, and the outer wall of the sealing ring 6 protrudes from the opening of the annular groove 5. This design not only prevents the sealing ring 6 from shifting during assembly or use, but also ensures that the sealing ring 6 can be fully compressed and deformed when the male connector 1 and the female connector 2 are assembled, thereby guaranteeing the sealing effect. Considering the operating conditions of the hydrogen compressor outlet, the sealing ring 6 is made of perfluoroether rubber. This material has excellent hydrogen permeability resistance, high and low temperature resistance, can adapt to temperature fluctuations from -20℃ to 200℃, and has aging resistance, enabling it to withstand the corrosion of the high-pressure hydrogen environment for a long time, avoiding seal failure due to material failure.

[0026] To ensure a tight seal between the metal conical surface seal and the rubber seal after the male connector 1 and female connector 2 are assembled, the sealing joint also includes a retaining ring 7 and a fastening plug 8. For example... Figure 2 As shown, the retaining ring 7 is tightened to the outer wall of the male connector 1 via a left-hand thread from right to left. The fastening plug 8 is annular and fitted onto the outside of the male connector 1, and its outer wall is machined with external threads, which can mate with the internal threads inside the female connector 2 to achieve a threaded connection. When the fastening plug 8 is tightened into the female connector 2, its end face pushes the retaining ring 7 into the female connector 2, thereby causing the male connector 1 to move forward axially, further pressing the tapered head 3 against the groove wall of the tapered groove 4, and simultaneously increasing the compression of the sealing ring 6 to ensure the reliability of the double seal. At the same time, when the fastening plug 8 and the retaining ring 7 are tightly engaged, the right-hand rotation of the fastening plug 8 is equivalent to causing the retaining ring 7 to rotate left, further pushing the male connector 1 into the female connector 2. This avoids the situation where tightening the fastening plug 8 causes the retaining ring 7 to loosen, thus preventing the male connector 1 from tightly fitting into the female connector 2.

[0027] It is worth noting that the angle between the wall of the conical groove 4 and the axis of the male head 1 is 0.5 degrees larger than the angle between the outer wall of the conical head 3 and the axis of the male head 1. This angle design ensures that the mating surfaces of the conical head 3 and the conical groove 4 only form line contact at the front end of the conical head 3, rather than surface contact. Line contact effectively reduces uneven contact of the mating surfaces caused by machining errors or thermal deformation, ensuring the sealing performance of the metal sealing surface, while avoiding local gaps that may occur in surface contact, further improving sealing reliability. In addition, both the male head 1 and the female head 2 are made of 316L stainless steel. This material has good corrosion resistance, high strength, and excellent thermal conductivity, which can adapt to the high pressure and temperature fluctuation conditions at the outlet of the hydrogen compressor, while reducing the difference in thermal deformation caused by excessive differences in the thermal conductivity of the materials, indirectly helping to improve sealing stability.

[0028] The specific assembly process of the sealing joint is as follows: First, install the sealing ring 6 made of perfluoroether rubber into the annular groove on the conical surface of the conical head 3 of the male connector 1, ensuring that the sealing ring 6 is fully embedded in the groove and its outer wall protrudes from the groove opening; next, tighten the retaining ring 7 onto the designated position on the outer wall of the male connector 1 using a left-hand thread, and then insert the fastening plug 8 from the rear end of the male connector 1, positioning it outside the retaining ring 7; after that, insert the end of the male connector 1 with the conical head 3 into the female connector 2, so that the outer wall of the conical head 3 initially contacts the wall of the conical groove 4 of the female connector 2. Meanwhile, ensure that the sealing ring 6 is in contact with the inner wall of the conical groove 4; finally, tighten the fastening plug 8 into the female head 2 through the right-hand thread. During the tightening process of the fastening plug 8, its end face will push the retaining ring 7 into the female head 2. Since the retaining ring 7 and the male head 1 are connected by a left-hand thread, when the retaining ring 7 moves, it will drive the male head 1 to move forward along the axial direction, so that the conical head 3 and the groove wall of the conical groove 4 are tightly fitted to form a metal wire seal. At the same time, the sealing ring 6 is further squeezed and deformed to form a reliable rubber seal. This completes the assembly of the entire sealing joint.

[0029] In actual use, when the temperature of the hydrogen compressor outlet pipeline fluctuates due to start-up, shutdown, or load adjustment, even if the male connector 1 and female connector 2 experience thermal deformation differences due to differences in material thermal conductivity and structural dimensions, resulting in a small gap between the metal mating surfaces of the conical head 3 and the conical groove 4, the pre-compressed perfluoroether rubber sealing ring 6 can still compensate for this gap with its own elasticity, maintaining tight contact with the inner wall of the conical groove 4. This continuously blocks the hydrogen leakage path, ensuring the sealing reliability and safety of the entire sealing joint under temperature fluctuation conditions, and effectively preventing safety accidents such as fires and explosions caused by hydrogen leakage.

Claims

1. A high-pressure CT conical threaded sealing joint at the outlet of a hydrogen compressor, characterized in that: It includes a male and a female connector that fit together, so that the male connector can be inserted into the female connector; one end of the male connector is provided with a tapered head; the female connector is provided with a tapered groove to cooperate with the tapered head, so that when the male connector is inserted into the female connector, the tapered head fits against the groove wall of the tapered groove; the tapered surface of the tapered head is also provided with an elastic sealing ring, so that when the male connector is inserted into the female connector, the sealing ring fits against the inner wall of the tapered groove.

2. The high-pressure CT conical threaded sealing joint at the outlet of the hydrogen compressor according to claim 1, characterized in that: The conical head has an annular groove along its circumference on its conical surface; the sealing ring is fitted inside the annular groove and protrudes from the opening of the annular groove.

3. The high-pressure CT conical threaded sealing joint at the outlet of the hydrogen compressor according to claim 2, characterized in that: The sealing ring is made of perfluoroether rubber.

4. The high-pressure CT conical threaded sealing joint at the outlet of the hydrogen compressor according to claim 3, characterized in that: It also includes a retaining ring and a fastening plug; the retaining ring is threaded to the outer wall of the male connector; the fastening plug is annular and sleeved on the outside of the male connector; the fastening plug is provided with external threads so that the fastening plug is threaded to the inside of the female connector so that when the fastening plug is tightened on the female connector, it pushes the retaining ring to move into the inside of the female connector.

5. The high-pressure CT conical threaded sealing joint at the outlet of the hydrogen compressor according to claim 4, characterized in that: The retaining ring and the male head are fitted with a left-hand thread; the fastening plug and the female head are fitted with a right-hand thread.

6. The high-pressure CT conical threaded sealing joint at the outlet of the hydrogen compressor according to claim 5, characterized in that: The angle between the wall of the conical groove and the axis of the male head is 0.5 degrees larger than the angle between the outer wall of the conical head and the axis of the male head.

7. The high-pressure CT conical threaded sealing joint at the outlet of the hydrogen compressor according to claim 6, characterized in that: Both the male and female connectors are made of 316L stainless steel.

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