Sealing gasket structure of hydrogen diaphragm compressor
By employing a "Z"-shaped sealing gasket structure and an annular bump extrusion mechanism in the hydrogen diaphragm compressor, the problem of gasket leakage under high-frequency pressure fluctuations and wear is solved, achieving the effects of double sealing and extended service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-31
AI Technical Summary
The gaskets of traditional hydrogen diaphragm compressors are prone to leakage under high-frequency pressure fluctuations and wear, leading to hydrogen leakage, affecting safety and wasting resources.
It adopts a sealing gasket structure with a "Z" shaped cross section, and forms a double sealing area through the compression of annular protrusions A and B. It also uses a tension spring and moving ring mechanism to automatically replace the worn part when it wears out, thus maintaining the sealing performance.
It improves sealing performance, extends the service life of the gasket, and uses probe signals to indicate when to replace it, preventing hydrogen leakage.
Smart Images
Figure CN224064499U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydrogen diaphragm compressor technology, and in particular to a sealing gasket structure for a hydrogen diaphragm compressor. Background Technology
[0002] At the pipe connections of a hydrogen diaphragm compressor, specifically at the junctions of the inlet and outlet pipes with the compressor body, gaskets are installed to ensure a tight seal between the pipes and the compressor, preventing hydrogen leakage at the pipe connections. Traditional gaskets are O-rings with a circular cross-section, a type of compression seal. They rely on the elastic deformation of the ring itself to create contact pressure on the sealing surface. Leakage does not occur when this contact pressure exceeds the internal pressure of the sealed medium. Alternatively, a sealing groove can be created at the sealing surface where two flanges meet, embedding the O-ring, and sealing is achieved by pre-tightening the flange bolts.
[0003] However, due to the large and high-frequency pressure fluctuations during compressor operation, the sealing gaskets are prone to fatigue, resulting in gaps and hydrogen leakage. Simultaneously, friction and gas compression during operation cause the gaskets to wear and thin, thus reducing their sealing performance. Related data shows that over 70% of hydrogen leaks are caused by this; such leaks waste resources, threaten safety, and pollute the environment. Utility Model Content
[0004] This invention provides a sealing gasket structure for a hydrogen diaphragm compressor to solve the above-mentioned technical problems.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A sealing gasket structure for a hydrogen diaphragm compressor is disclosed. The cylinder and connecting pipe of the hydrogen diaphragm compressor each have a slot on their respective sides. An annular component is installed within the slot and fixed to it. An annular protrusion A and an annular protrusion B are fixedly installed on the side of any annular component away from the other annular component. An annular sealing gasket is provided within the slot. The fixed end of the sealing gasket is fixed to the inner ring of an annular protrusion A, and the free end of the sealing gasket is subjected to a force that causes it to move away from an annular protrusion B.
[0007] The sealing gasket also includes a contact part and a connecting part. The cross-section of the sealing gasket is in a "Z" shape. In the initial state, the contact part is pressed against the groove by the annular protrusion A. When the connection part of the sealing gasket and the contact part are connected due to wear and structural changes occur, the connecting part is transformed into a contact part that contacts the groove.
[0008] Preferably, the sealing gasket has a compression ring at the folded edge near the annular protrusion A. The compression ring is used to support the sealing gasket and make the sealing gasket form a stable structure.
[0009] Preferably, the outer ring of the annular component is provided with a groove, a tension spring is fixedly installed on the inner side of the groove, and a movable ring is slidably connected in the groove. One side of the movable ring is fixed to the movable end of the sealing gasket, and the other side is fixed to the tension spring.
[0010] Preferably, the portion of the sealing gasket pressed by the annular protrusion A has line contact with the groove, while the portion of the sealing gasket pressed by the annular protrusion B has surface contact with the groove.
[0011] Preferably, the extrusion ring is sleeved on the outside of the annular protrusion A, and the two work together to extrude the sealing gasket. When the connecting part of the sealing gasket changes to the contact part that contacts the groove, the extrusion ring begins to be stressed, causing it to move along the direction of the annular protrusion A.
[0012] Preferably, both the cylinder and the connecting pipe are provided with limiting grooves, a probe is slidably connected in the limiting groove, a spring is fixedly connected between the probe and the inner wall of the limiting groove, and one end of the probe extends into the sliding groove. An annular boss is fixedly connected to one side of the moving ring, and the annular boss has an inclined surface structure that pushes the probe to move.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] This utility model discloses a sealing gasket structure for a hydrogen diaphragm compressor. The sealing gasket has a "Z"-shaped cross-section and is compressed by annular protrusions A and B, causing it to fit against the groove and forming two sealing areas to improve sealing performance. When the contact part of the sealing gasket wears and thins, the compressive force of the annular protrusions and the groove decreases. The tension spring applies a force to the moving ring, pulling the free end of the sealing gasket to move, transforming the connecting part towards the contact part, replacing the worn part, solving the gas leakage problem, and improving the service life of the sealing gasket. When the free end of the sealing gasket moves to its maximum stroke, the inclined surface presses against the probe, causing it to leak out of the limiting groove. The need to replace the sealing gasket is determined by observing the position where the probe leaks out. Attached Figure Description
[0015] Figure 1 This is a structural schematic diagram of the cylinder and connecting pipe of this utility model;
[0016] Figure 2 This is a sectional view of the front view of the cylinder and connecting pipe of this utility model;
[0017] Figure 3 This is a sectional view of the front view of the annular component and sealing gasket of this utility model;
[0018] Figure 4 This is a sectional view of the top view of the annular component and sealing gasket of this utility model;
[0019] Figure 5 This is an exploded view of part of the structure of this utility model.
[0020] In the figure: 1-Cylinder; 2-Connecting pipe; 3-Groove; 4-Annular part; 5-Annular protrusion A; 6-Annular protrusion B; 7-Sealing gasket; 701-Contact part; 702-Connecting part; 8-Extrusion ring; 9-Tension spring; 10-Moving ring; 11-Limiting groove; 12-Probe; 13-Annular boss. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.
[0022] Example
[0023] like Figure 1-5 The diagram illustrates a sealing gasket structure for a hydrogen diaphragm compressor. The cylinder 1 and connecting pipe 2 of the compressor are fixed together by a flange. A slot 3 is provided on the side of the cylinder 1 and connecting pipe 2 that are close to each other. Two annular components 4 are installed in each slot 3, fixed to each other. The two annular components 4 are symmetrically arranged. The outer ring of the annular component 4 has a groove. A tension spring 9 is fixedly installed on the inner side of the groove. A movable ring 10 is slidably connected within the groove. One side of the movable ring 10 is fixed to the movable end of the sealing gasket 7, and the other side is fixed to the tension spring 9. The tension spring 9 applies a force to the movable ring 10 away from the annular protrusion B6, thereby causing the free end of the sealing gasket 7 to move away from the annular protrusion B6. An annular protrusion A5 and an annular protrusion B6 are fixedly installed on the side of any annular component 4 away from the other annular component 4. An annular sealing gasket 7 is provided in the groove 3. A compression ring 8 is provided at the folded edge of the sealing gasket 7 near the annular protrusion A5. The compression ring 8 is used to support the sealing gasket 7 and make the sealing gasket 7 form a stable structure. The part of the sealing gasket 7 compressed by the annular protrusion A5 has line contact with the groove 3, and the part of the sealing gasket 7 compressed by the annular protrusion B6 has surface contact with the groove 3. The compression ring 8 is fitted on the outside of the annular protrusion A5, and the two work together to compress the sealing gasket 7. When the connecting part 702 of the sealing gasket 7 changes to the contact part 701 that contacts the groove 3, the compression ring 8 begins to be stressed, causing it to move along the direction of the annular protrusion A5, ensuring that a part of the sealing gasket 7 can be released. This facilitates the transformation of the connecting part 702 into the contact part 701 that contacts the groove 3. The fixed end of the sealing gasket 7 is fixed to the inner ring of the annular protrusion A5, and the free end of the sealing gasket 7 is subjected to a force that causes it to move away from the annular protrusion B6.
[0024] Both cylinder 1 and connecting pipe 2 are provided with limiting grooves 11. A probe 12 is slidably connected in the limiting groove 11. A spring is fixedly connected between the probe 12 and the inner wall of the limiting groove 11, and one end of the probe 12 extends into the sliding groove. An annular boss 13 is fixedly connected to one side of the moving ring 10. The annular boss 13 has an inclined surface structure that pushes the probe 12 to move. When the moving ring drives the annular boss 13 to move, the inclined surface of the annular boss 13 will abut against one end of the probe 12 and cause the probe 12 to leak out from the limiting groove 11. The distance from which the probe 12 leaks out is observed to determine whether the sealing gasket 7 needs to be replaced.
[0025] The sealing gasket 7 also includes a contact portion 701 and a connecting portion 702. The cross-section of the sealing gasket 7 is in a "Z" shape. In the initial state, the contact portion 701 is pressed against the groove 3 by the annular protrusion A5. When the contact portion 701 of the sealing gasket 7 is pressed against the groove 3, the sealing gasket 7 should be deformed accordingly to ensure that the sealing gasket 7 and the groove 3 can be in close contact and improve the sealing performance. When the connecting portion 702 of the sealing gasket 7 and the contact portion 701 are connected due to wear and the structure changes, the connecting portion 702 is transformed into the contact portion 701 that contacts the groove 3.
[0026] In use, the two annular parts 4 are first integrally formed and inserted into the groove 3. The cylinder 1 and connecting pipe 2 in the hydrogen diaphragm compressor are connected through the flange. Both annular protrusions A5 and B6 compress the sealing gasket 7, so that the sealing gasket 7 fits the groove 3. At this time, the compressed part of the sealing gasket 7 should deform to ensure that the sealing gasket 7 and the groove 3 can be in close contact, thereby improving the sealing performance. Since both annular protrusions A5 and B6 compress the sealing gasket 7, two sealing areas are formed between the sealing gasket 7 and the groove 3, achieving the purpose of double sealing and further improving its sealing performance.
[0027] Subsequently, due to the large and high-frequency pressure fluctuations during compressor operation, the gaskets become fatigued, gaps appear, and hydrogen leakage occurs. At the same time, friction and gas compression during operation cause traditional gaskets to wear and thin, reducing sealing performance. However, this sealing gasket 7 adopts a Z-shaped cross-section structure. The compressive force of the annular protrusion B6 and the inner wall of the groove 3 on the sealing gasket 7 should be greater than the tension of the tension spring 9. When the surface contact part 701 wears, it will become thinner, and the compressive force of the annular protrusion and the groove 3 on the sealing gasket 7 will decrease. At this time, since the tension spring 9 is always in a stretched state, the tension spring 9 applies a force away from the annular protrusion B6 to the moving ring 10, thereby causing the free end of the sealing gasket 7 to be moved away from the annular protrusion B6. The moving ring 10 pulls the free end of the sealing gasket 7 to move, turning the connecting part 702 of the sealing gasket 7 towards the surface contact part 701, which is equivalent to removing the worn part and replacing it with a new part of the sealing gasket 7. Therefore, it can not only solve the problem of gas leakage after wear and thinning, but also improve the service life of the sealing gasket 7.
[0028] During the transformation process, the sealing gasket 7 exerts a thrust on the compression ring 8, enabling the compression ring 8 to move along the annular protrusion A5 and release a portion of the sealing gasket 7. It should be noted that the annular protrusion A5 and the compression ring 8 work together to maintain the "Z" shaped structure of the sealing gasket 7. Only when the sealing gasket 7 has a non-linear structure can a portion of the sealing gasket 7 be released during the transformation process to replace the old sealing part. In summary, when the connection part 702 and the contact part 701 of the sealing gasket 7 undergo structural changes due to wear, the connection part 702 is correspondingly transformed into the contact part 701 that contacts the groove 3. This not only solves the problem of gas leakage after wear and thinning but also improves the service life of the sealing gasket 7.
[0029] Finally, since the moving ring 10 can only move a limited distance within the groove 3 of the annular part 4, the transition distance of the sealing gasket 7 also has a predetermined value. When the moving ring 10 moves, it can drive the annular boss 13 to move closer to the probe 12. When the annular boss 13 moves to its maximum stroke, the inclined surface of the annular boss 13 will press against the probe 12, causing the probe 12 to move along the limiting groove 11 and protrude from the limiting groove 11. By observing the position where the probe 12 protrudes, it can be determined whether the sealing gasket 7 needs to be replaced.
[0030] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.
Claims
1. A seal gasket structure of a hydrogen diaphragm compressor, a slot (3) is formed on the side of a cylinder (1) and a connecting pipe (2) of the hydrogen diaphragm compressor which are close to each other, characterized in that: Two notches (3) are installed with annular parts (4) fixed relative to them, and any annular part (4) is fixedly installed with annular protrusions A (5) and annular protrusions B (6) away from the other annular part (4), and the notch (3) is provided with an annular sealing gasket (7), the fixed end of the sealing gasket (7) is fixed with the inner ring of the annular protrusion A (5), and the free end of the sealing gasket (7) is subjected to the action force of moving away from the annular protrusion B (6); The sealing gasket (7) further comprises a contact part (701) and a connecting part (702), and the cross section of the sealing gasket (7) is a "Z" shaped structure, in the initial state, the contact part (701) is attached to the notch (3) by the extrusion of the annular protrusion A (5); when the connecting part (702) and the contact part (701) are connected due to wear, the connecting part (702) is correspondingly changed into the contact part (701) in contact with the notch (3).
2. The seal gasket structure of a hydrogen gas diaphragm compressor according to claim 1, characterized by, The sealing gasket (7) is provided with an extrusion ring (8) near the folded edge of the annular protrusion A (5), the extrusion ring (8) is used for supporting the sealing gasket (7) and forming a stable structure.
3. The seal gasket structure of a hydrogen gas diaphragm compressor according to claim 1, characterized by, The outer ring of the annular part (4) is provided with a sliding groove, the inner side of the sliding groove is fixedly installed with a tension spring (9), and the sliding groove is slidably connected with a moving ring (10), one side of the moving ring (10) is fixed with the movable end of the sealing gasket (7), and the other side is fixed with the tension spring (9).
4. The seal gasket structure of a hydrogen gas diaphragm compressor according to claim 1, characterized by, The part of the sealing gasket (7) extruded by the annular protrusion A (5) is in line contact with the notch (3), and the part of the sealing gasket (7) extruded by the annular protrusion B (6) is in surface contact with the notch (3).
5. The seal gasket structure of a hydrogen gas diaphragm compressor according to claim 2, characterized by The extrusion ring (8) is sleeved on the outer side of the annular protrusion A (5), and the two cooperate to extrude the sealing gasket (7), when the connecting part (702) of the sealing gasket (7) changes to the contact part (701) in contact with the notch (3), the extrusion ring (8) begins to be stressed, and moves along the direction of the annular protrusion A (5).
6. The seal gasket structure of a hydrogen gas diaphragm compressor according to claim 3, characterized by The cylinder (1) and the connecting pipeline (2) are both provided with limiting grooves (11), the two limiting grooves (11) are communicated with each other, and the two limiting grooves (11) are slidably connected with a probe (12), the spring is fixedly connected between the probe (12) and the inner wall of the limiting groove (11), and one end of the probe (12) extends into the sliding groove, one side of the moving ring (10) is fixedly connected with an annular boss (13), and the annular boss (13) has a slope structure for pushing the probe (12) to move.