Short-stroke high-reliability reusable sealing structure
By designing a multiple-bending connection structure of the male head, female head and connecting sleeve, and utilizing the elastic deformation of the soft sealing ring, the sealing structure can be plugged in and out multiple times and reused, solving the problems of easy damage to hard seals and difficult detection of soft seals, and improving the sealing effect and rocket carrying capacity.
Patent Information
- Application Number
- CN202423268576.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The existing hard sealing structure is easily affected by the medium and trapped particles, resulting in poor sealing. The soft sealing structure is difficult to detect after failure, the sealing effect is poor, and the entire structure needs to be replaced after multiple uses, and the sealing effect cannot be guaranteed.
A sealing structure is designed, which includes a male head, a female head, a connecting sleeve, an inner sealing ring and an outer sealing ring. The structure is connected by multiple bendings and the elastic deformation of the soft sealing ring is used to achieve multiple plugging and unplugging. The sealing rings are located on different bending surfaces to reduce the probability of failure. The connecting sleeve is detachable for easy replacement.
It improves the sealing effect, adapts to multiple insertions and removals, reduces structural weight, is suitable for high-pressure gas-liquid pipeline sealing, and is reusable, thus reducing rocket launch costs.
Smart Images
Figure CN223460066U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of sealing structure, in particular to a short-stroke high-reliability reusable sealing structure. BACKGROUND
[0002] Sealing can generally be divided into hard sealing and soft sealing. Hard sealing refers to a sealing mode realized by tight contact of two metal surfaces. Both sides of the sealing pair are metal materials or other relatively hard materials, such as stainless steel, copper and other metal materials cooperating to form a seal. This tight contact is similar to a lap joint state, thereby preventing medium leakage. Soft sealing mainly utilizes the elastic deformation of soft materials (such as rubber, plastic and the like) to realize sealing. The materials on both sides of the sealing pair are metal on one side and soft material on the other side.
[0003] However, the hard sealing structure is realized by applying force to cause plastic deformation of both sides of the sealing pair, but if the structure is disconnected and then reconnected, since both sides of the sealing pair are metal materials or other relatively hard materials, both sides of the sealing pair are easily deformed by the medium and the particles clamped in, which can easily cause bite marks on the sealing surface, thereby causing poor sealing, and the sealing effect will be weakened, and the sealing structure needs to be replaced after multiple uses.
[0004] For the soft sealing structure, during the insertion of one sealing member into another sealing member cooperating therewith, the soft sealing structure (such as an O-ring) between the two sealing members can fail (such as deformation, damage), but even if the soft sealing structure fails, since the soft sealing structure will be inserted into another sealing member with the sealing member, it cannot be known whether the soft sealing structure fails, and if you want to know whether the soft sealing structure fails, you can only pull out the sealing member to confirm the soft sealing structure, and then insert the sealing member again, but the state of the soft sealing structure cannot be known after the sealing member is inserted again, so the sealing effect of the soft sealing structure cannot be better guaranteed.
[0005] Therefore, how to improve the sealing effect and make the sealing structure adaptable to multiple insertions and extractions to repeatedly use the sealing structure is a technical problem that the technical personnel in the field urgently need to solve at present. CONTENT OF THE INVENTION
[0006] The present application provides a short-stroke high-reliability reusable sealing structure to improve the sealing effect and make the sealing structure adaptable to multiple insertions and extractions to repeatedly use the sealing structure.
[0007] To solve the above technical problems, the present application provides the following technical solutions:
[0008] The short-stroke high-reliability reusable sealing structure comprises a male head, a female head, a connecting sleeve, an inner sealing ring and an outer sealing ring; wherein a butt joint cavity is formed in the pipe wall of the butt joint section of the female head, and the opening of the butt joint cavity is located on the butt joint end face of the female head; the butt joint section of the male head is inserted into the butt joint cavity from the opening of the butt joint cavity; the inner sealing ring and the outer sealing ring are located in the butt joint cavity, and the inner sealing ring is located between the inner wall face of the butt joint section of the male head and the inner side inner wall face of the butt joint cavity of the female head, and the outer sealing ring is located between the outer wall face of the butt joint section of the male head and the outer side inner wall face of the butt joint cavity of the female head; the connecting sleeve has an assembly channel passing through both ends, the exposed part of the butt joint section of the male head and the butt joint section of the female head are located in the assembly channel of the connecting sleeve, and the positioning end of the connecting sleeve is clamped to the rear end face of the butt joint section of the male head; and the connecting sleeve and the connecting section of the female head are detachably connected.
[0009] The short-stroke high-reliability reusable sealing structure as described above, wherein preferably, the inner diameter of the butt joint section of the male head is larger than the inner diameter of other pipe sections of the male head; the outer diameter of the outer wall of the butt joint cavity of the female head is larger than the outer diameter of other pipe sections of the female head, the inner diameter of the inner wall of the butt joint cavity of the female head is equal to the inner diameter of other pipe sections of the female head and the inner diameter of other pipe sections of the male head.
[0010] The short-stroke high-reliability reusable sealing structure as described above, wherein preferably, the outer wall face of the butt joint section of the male head has a first installation groove concave inward, and part of the outer sealing ring is located in the first installation groove.
[0011] The short-stroke high-reliability reusable sealing structure as described above, wherein preferably, the inner side inner wall face of the butt joint cavity of the female head has a second installation groove concave inward, and part of the inner sealing ring is located in the second installation groove.
[0012] The short-stroke high-reliability reusable sealing structure as described above, wherein preferably, the connection between the outer wall face of the butt joint section of the male head and the butt joint end face of the male head forms a lead angle, and the connection between the end face of the inner wall of the butt joint cavity of the female head and the inner side inner wall face of the butt joint cavity of the female head forms a lead angle.
[0013] The short-stroke high-reliability reusable sealing structure as described above, wherein preferably, a plurality of butt joint cavities arranged from inside to outside are formed in the pipe wall of the butt joint section of the female head, and the male head has a plurality of butt joint sections arranged from inside to outside, and one butt joint section of the male head is inserted into one butt joint cavity of the female head; the inner sealing ring and the outer sealing ring are arranged in each butt joint cavity of the female head, and the inner sealing ring is located between the inner wall face of the corresponding butt joint section of the male head and the inner side inner wall face of the corresponding butt joint cavity of the female head, and the outer sealing ring is located between the outer wall face of the corresponding butt joint section of the male head and the outer side inner wall face of the corresponding butt joint cavity of the female head.
[0014] The short-stroke high-reliability reusable sealing structure as described above, preferably, the inner surface of the connecting sleeve is internally threaded, the outer wall surface of the mating cavity of the female head is externally threaded, the internal threads of the connecting sleeve are threadedly connected with the external threads of the female head to achieve detachable connection of the connecting section of the connecting sleeve and the female head.
[0015] The short-stroke high-reliability reusable sealing structure as described above, preferably, the outer wall surface of the mating section of the male head has a first positioning protrusion extending outward, and the first positioning protrusion is away from the mating end surface of the male head compared with the first mounting groove; the first positioning protrusion is in abutment with the end surface of the outer wall of the mating cavity of the female head.
[0016] The short-stroke high-reliability reusable sealing structure as described above, preferably, the outer surface of the first positioning protrusion is flush with the outer wall surface of the mating cavity of the female head, or the outer surface of the first positioning protrusion is lower than the outer wall surface of the mating cavity of the female head.
[0017] The short-stroke high-reliability reusable sealing structure as described above, preferably, the positioning end of the connecting sleeve extends inwardly with a second positioning protrusion, and the front end surface of the second positioning protrusion is in abutment with the rear end surface of the first positioning protrusion to limit the clamping of the male head.
[0018] In view of the above background, the male head and the female head of the sealing structure of the present application are connected through multiple bending, so as to improve the sealing effect, and the length of the sealing section between the male head and the female head is short due to the multiple bending, so that the sealing structure of the present application is a short-stroke structure, which is beneficial to the overall layout, reduces the structural quality, and improves the rocket carrying capacity. In addition, since the sealing rings are located on different bending surfaces, compared with the sealing rings located on the same surface, the possibility of all sealing rings being invalid after insertion can be reduced, so that the sealing effect of the sealing structure of the present application is better, and the sealing structure can be applied to high-pressure gas and liquid pipeline docking sealing. Furthermore, since the sealing structure of the present application uses a soft sealing structure such as a sealing ring, compared with the hard sealing structure, the hard sealing structure needs to be cut off, then welded and pickled, and the whole pipeline needs to be removed. The sealing structure of the present application can be adapted to multiple plugging and unplugging, and only the sealing ring needs to be replaced after plugging and unplugging, so that the sealing structure can be reused, and the plugging and unplugging installation is convenient without the need to remove the whole pipeline. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.
[0020] Figure 1is a perspective view of a short-stroke high-reliability reusable sealing structure of the present application;
[0021] Figure 2 is a sectional view of a short-stroke high-reliability reusable sealing structure of the present application;
[0022] Figure 3 is a perspective view of a male head of a short-stroke high-reliability reusable sealing structure of the present application;
[0023] Figure 4 is a sectional view of a male head of a short-stroke high-reliability reusable sealing structure of the present application;
[0024] Figure 5 is a perspective view of a female head of a short-stroke high-reliability reusable sealing structure of the present application;
[0025] Figure 6 is a sectional view of a female head of a short-stroke high-reliability reusable sealing structure of the present application. DETAILED DESCRIPTION
[0026] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and letters throughout the several views denote the same or like elements or components. Additionally, spatially relative terms such as "upper", "lower", "left", "right", "front", "back", and the like, can be used herein for ease of description to explain the orientation of one part or element relative to another part or element as illustrated in the various figures. The embodiments described below are exemplary and are intended to be illustrative of the present application and not to be limiting thereof.
[0027] As shown in Figures 1 to 6 the present application provides a short-stroke high-reliability reusable sealing structure, comprising: a male head 110, a female head 120, a connecting sleeve 130, an inner sealing ring 140, and an outer sealing ring 150.
[0028] The male head 110 has a flow channel passing through both ends, and the female head 120 has a flow channel passing through both ends, so that after the butt joint of the butt joint section of the male head 110 and the butt joint section of the female head 120 is connected in communication, the medium flows from the flow channel of the male head 110 and the flow channel of the female head 120.
[0029] The pipe wall of the butt joint section of the female head 120 is formed with a butt joint cavity, and the opening of the butt joint cavity is located on the butt joint end face of the female head 120; the butt joint section of the male head 110 is inserted into the butt joint cavity of the female head 120 from the opening of the butt joint cavity; the inner side sealing ring 140 and the outer side sealing ring 150 are located in the butt joint cavity of the female head 120, and the inner side sealing ring 140 is located between the inner wall face of the butt joint section of the male head 110 and the inner side inner wall face of the butt joint cavity of the female head 120, and the outer side sealing ring 150 is located between the outer wall face of the butt joint section of the male head 110 and the outer side inner wall face of the butt joint cavity of the female head 120.
[0030] Optionally, the pipe wall of the butt joint section of the male head 110 is expanded outward, that is, the inner diameter of the butt joint section of the male head 110 is greater than the inner diameter of other pipe sections of the male head 110, so that after the butt joint section of the male head 110 is inserted into the butt joint cavity of the female head 120, the inner diameters of the other pipe sections of the male head 110 and the inner diameter of the butt joint section of the female head 120 are equal, thereby ensuring that the inner wall of the flow channel is smooth and flat. Further optionally, the outer wall face of the butt joint section of the male head 110 has a first installation groove concave inward, and part of the outer side sealing ring 150 is located in the first installation groove, thereby limiting the outer side sealing ring 150, avoiding displacement and deformation of the outer side sealing ring 150 when the butt joint section of the male head 110 is inserted into the butt joint cavity of the female head 120. Yet further optionally, the outer wall face of the butt joint section of the male head 110 has a first positioning protrusion extending outward, and the first positioning protrusion is farther away from the butt joint end face of the male head 110 than the first installation groove, and after the butt joint section of the male head 110 is inserted into the butt joint cavity of the female head 120, the first positioning protrusion abuts against the end face of the outer wall of the butt joint cavity of the female head 120, thereby limiting the female head 120 and further playing a sealing role.
[0031] Optionally, the outer wall of the butt joint cavity of the female head 120 is expanded outward, that is, the outer diameter of the outer wall of the butt joint cavity of the female head 120 is greater than the outer diameter of other pipe sections of the female head 120, and the inner wall of the butt joint cavity of the female head 120 is flush with the other pipe sections of the female head 120, that is, the inner diameter of the inner wall of the butt joint cavity of the female head 120 is equal to the inner diameter of the other pipe sections of the female head, so that after the butt joint section of the male head 110 is inserted into the butt joint cavity of the female head 120, the inner diameters of the butt joint section and the other pipe sections of the female head 120 are equal to the inner diameters of the other pipe sections of the male head 110, thereby ensuring that the inner wall of the flow channel is smooth and flat. Further optionally, the inner side inner wall face of the butt joint cavity of the female head 120 has a second installation groove concave inward, and part of the inner side sealing ring 140 is located in the second installation groove, thereby limiting the inner side sealing ring 140, avoiding displacement and deformation of the inner side sealing ring 140 when the butt joint section of the male head 110 is inserted into the butt joint cavity of the female head 120.
[0032] On the basis, the pipe wall of the butt joint section of the female head 120 is formed with a plurality of butt joint cavities arranged from inside to outside, and the opening of each butt joint cavity is located on the butt joint end face of the female head 120; the male head 110 has a plurality of butt joint sections arranged from inside to outside, and one butt joint section of the male head 110 is inserted into one butt joint cavity of the female head 120; the butt joint cavity of each female head 120 is provided with an inner sealing ring 140 and an outer sealing ring 150, and the inner sealing ring 140 is located between the inner wall surface of the corresponding butt joint section of the male head 110 and the inner side wall surface of the corresponding butt joint cavity of the female head 120, and the outer sealing ring 150 is located between the outer wall surface of the corresponding butt joint section of the male head 110 and the outer side wall surface of the corresponding butt joint cavity of the female head 120.
[0033] In addition, the outer wall surface of the butt joint section of the male head 110 and the butt joint end face of the male head 110 form a guide angle 170, and the end face of the inner wall of the butt joint cavity of the female head 120 and the inner side wall surface of the butt joint cavity of the female head 120 form a guide angle 160. Optionally, the guide angle 170 of the male head 110 and the guide angle 160 of the female head 120 can be a round angle or an inclined angle. Figure 1 The guide angle 160 and the guide angle 170 shown in the figure are both inclined angles.
[0034] The connecting sleeve 130 has an assembly channel penetrating through both ends, and the exposed part of the butt joint section of the male head 110 and the butt joint section of the female head 120 are located in the assembly channel of the connecting sleeve 130, and the positioning end of the connecting sleeve 130 is clamped to the rear end face of the butt joint section of the male head 110, and the connecting section of the connecting sleeve 130 and the female head 120 is detachably connected, so as to connect the male head 110 and the female head 120 together.
[0035] Optionally, the inner surface of the connecting sleeve 130 has an internal thread, the outer wall surface of the butt joint cavity of the female head 120 has an external thread, and the internal thread of the connecting sleeve 130 is threadedly connected with the external thread of the female head 120, so as to realize the detachable connection of the connecting section of the connecting sleeve 130 and the female head 120. Further optionally, the outer surface of the first positioning protrusion is flush with the outer wall surface of the butt joint cavity of the female head 120, or the outer surface of the first positioning protrusion is lower than the outer wall surface of the butt joint cavity of the female head 120, so as to avoid the first positioning protrusion from hindering the connection of the connecting sleeve 130 and the female head 120. Yet optionally, the positioning end of the connecting sleeve 130 extends inwardly with a second positioning protrusion, and the front end face of the second positioning protrusion is in contact with the rear end face of the first positioning protrusion, so as to clamp and limit the male head 110.
[0036] When the short-stroke high-reliability reusable sealing structure of the application is used, the inner sealing ring 140 is first placed in the second mounting groove, the outer sealing ring 150 is placed in the first mounting groove, then the mating section of the male head 110 is inserted into the mating cavity of the female head 120, and the connected male head 110 and female head 120 are inserted into the assembly channel of the connecting sleeve 130, so that the connecting sleeve 130 clamps the male head 110 and the connecting sleeve 130 is detachably connected with the female head 120, thereby completing the assembly of the short-stroke high-reliability reusable sealing structure of the application.
[0037] The assembled short-stroke high-reliability reusable sealing structure, the connection between the male head 110 and the female head 120 is bent multiple times, thereby improving the sealing effect; and because the connection between the male head 110 and the female head 120 is bent multiple times, the length of the sealing section between the male head 110 and the female head 120 is relatively short, so that the sealing structure of the application is a short-stroke structure, which is beneficial to the general assembly layout, reduces the structure quality, and improves the rocket carrying capacity.
[0038] In addition, because the sealing rings are located on different bending surfaces, compared with the sealing rings being located on the same surface, the possibility that all the sealing rings fail after being inserted can be reduced, so that the sealing effect is better; and even if the inner sealing ring fails, the medium needs to bypass the first bending and then pass through the outer sealing ring, and the outer sealing ring can prevent the gas and liquid from overflowing again; and when the sealing structure of the application deforms in the axial and radial directions (in a harsh working environment), the sealing rings are always in a compressed state, which can compensate for the influence of deformation in the axial and radial directions, and can always be in contact with the sealing surface. Unlike the current rocket ball head or double-step sealing, the sealing surface will not be affected by deformation, so that leakage will not occur.
[0039] Because the sealing effect of the sealing structure of the application is good, the sealing structure of the application can be applied to high-pressure gas and liquid pipeline sealing.
[0040] In addition, because the sealing structure in the application uses a soft sealing structure such as a sealing ring, compared with a hard sealing structure, the sealing structure of the application can be adapted to multiple insertions and extractions, and only the sealing ring needs to be replaced after insertion and extraction, so that the sealing structure can be reused, and the insertion and extraction are convenient, and the entire pipeline does not need to be removed.
[0041] Because the sealing effect of the sealing structure of the application is good, the sealing structure of the application can be applied to high-pressure gas and liquid pipeline sealing, and the sealing structure is a short-stroke structure, which is beneficial to the general assembly layout and can also be reused, so that the sealing structure of the application can be applied to related pipelines that need to be inserted and extracted multiple times in reusable rockets, which not only does not reduce the sealing performance (only the sealing ring needs to be replaced), but also reduces the cost of the rocket.
[0042] It will be apparent to those skilled in the art that the application is not limited to the details of the foregoing embodiment, that the present application can be embodied in other specific forms without departing from the spirit or essential character thereof, and that the intention is to be considered as limited solely by the terms of the appended claims, and not by the foregoing description, which is expressly included for the sole purpose of providing complete disclosure of the present application. Any reference in the foregoing specification to a claim, benefit under 35 U.S.C. § 120 or 365, priority under 35 U.S.C. § 119 or 365, or rule 20.6, will mean that the referenced claim, benefit or priority is to be taken as being incorporated by reference into this specification.
[0043] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description is made in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.
Claims
1. A short-stroke high-reliability reusable seal structure, characterized by, The utility model relates to a kind of male head, female head, connecting sleeve, inner side sealing ring and outer side sealing ring. The butt joint cavity of the female head is formed in the pipe wall of the butt joint section of the female head, and the opening of the butt joint cavity is located on the butt joint end face of the female head. The inner side sealing ring and the outer side sealing ring are located in the butt joint cavity, and the inner side sealing ring is located between the inner wall face of the butt joint section of the male head and the inner side inner wall face of the butt joint cavity of the female head. The exposed part of the butt joint section of the male head and the butt joint section of the female head are located in the assembly channel of the connecting sleeve, and the positioning end of the connecting sleeve is clamped to the rear end face of the butt joint section of the male head. The outer diameter of the outer wall of the butt joint cavity of the female head is greater than the outer diameter of other pipe sections of the female head, and the inner diameter of the inner wall of the butt joint cavity of the female head is equal to the inner diameter of other pipe sections of the female head and the inner diameter of other pipe sections of the male head.
2. The short-stroke high-reliability reusable seal structure according to claim 1, characterized by, The outer wall face of the butt joint section of the male head has a first installation groove concave inward, and part of the outer side sealing ring is located in the first installation groove. The inner side inner wall face of the butt joint cavity of the female head has a second installation groove concave inward, and part of the inner side sealing ring is located in the second installation groove.
3. The short-stroke high-reliability reusable seal structure according to claim 1 or 2, characterized by, The connection between the outer wall face of the butt joint section of the male head and the butt joint end face of the male head forms a guide angle, and the connection between the end face of the inner wall of the butt joint cavity of the female head and the inner side inner wall face of the butt joint cavity of the female head forms a guide angle.
4. The short-stroke high-reliability reusable seal structure according to claim 3, characterized by, The female head has a plurality of butt joint cavities arranged from inside to outside in the pipe wall of the butt joint section, and the male head has a plurality of butt joint sections arranged from inside to outside.
5. The short-stroke high-reliability reusable seal structure according to claim 1 or 2, characterized by, Each butt joint cavity of the female head is provided with an inner side sealing ring and an outer side sealing ring, and the inner side sealing ring is located between the inner wall face of the corresponding butt joint section of the male head and the inner side inner wall face of the corresponding butt joint cavity of the female head.
6. The short-stroke high-reliability reusable seal structure according to claim 1 or 2, characterized by, The inner surface of the connecting sleeve has an internal thread, the outer wall face of the butt joint cavity of the female head has an external thread, and the internal thread of the connecting sleeve is threadedly connected with the external thread of the female head to achieve detachable connection between the connecting sleeve and the connecting section of the female head. The outer wall face of the butt joint section of the male head has a first positioning protrusion extending outward, and the first positioning protrusion is away from the butt joint end face of the male head compared with the first installation groove.
7. The short-stroke high-reliability reusable seal structure according to claim 1 or 2, characterized by, The first positioning protrusion is in contact with the end face of the outer wall of the butt joint cavity of the female head.
8. The short-stroke high-reliability reusable seal structure according to claim 3, characterized by, The outer surface of the first positioning protrusion is flush with the outer wall face of the butt joint cavity of the female head, or the outer surface of the first positioning protrusion is lower than the outer wall face of the butt joint cavity of the female head. The positioning end of the connecting sleeve extends inwardly with a second positioning protrusion, and the front end face of the second positioning protrusion is in contact with the rear end face of the first positioning protrusion to clamp and limit the male head.
9. The short-stroke high-reliability reusable seal structure according to claim 8, characterized by, 10. The short-stroke high-reliability reusable seal structure according to claim 8, characterized by,