Short-stroke high-reliability reusable sealing structure
By designing a sealing structure including male head, female head, connecting sleeve, inner seal ring and outer seal ring, and through multiple bending and seal ring position optimization, the problem of poor sealing of the existing sealing structure after multiple use is solved, achieving a sealing effect of high reliability and reusability.
Patent Information
- Application Number
- CN202411975094.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-02-28
AI Technical Summary
The existing sealing structure is prone to poor sealing problems after multiple use, especially in hard sealing structures, metal materials are susceptible to influence of media and particles, resulting in weakening of sealing effect; while soft sealing structures are difficult to ensure sealing effect after multiple insertion and removal.
A sealing structure including a male head, a female head, a connecting sleeve, an inner sealing ring and an outer sealing ring is designed to improve the sealing effect through multiple bendings, and the position of the sealing ring is used on different bending surfaces to reduce the possibility of sealing ring failure.
It realizes high reliability and reusability of the sealing structure, is suitable for high-pressure gas and liquid pipeline docking sealing, and can maintain a good sealing effect after multiple insertions and removals.
Smart Images
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Abstract
Description
Technical Field
[0001] The present application relates to the field of sealing structures, and in particular to a short-stroke, highly reliable and reusable sealing structure. Background Art
[0002] Seals can generally be divided into hard seals and soft seals. Hard seals refer to the way of achieving sealing through close contact between two metal surfaces. Both sides of the seal pair are made of metal materials or other harder materials, such as stainless steel, copper and other metal materials that cooperate with each other to form a seal. This close contact is similar to the overlapping state, thereby preventing the leakage of the medium. Soft seals mainly use the elastic deformation of soft materials (such as rubber, plastic, etc.) to achieve sealing. The materials on both sides of the seal pair are metal on one side and soft material on the other side.
[0003] However, the hard sealing structure causes plastic deformation on both sides of the sealing pair by applying force. But if this structure is disconnected and then reconnected, since both sides of the sealing pair are made of metal materials or other harder materials, they are easily deformed by the medium and the trapped particles, which can easily lead to bite marks on the sealing surface, resulting in poor sealing. The sealing effect will be weakened and the sealing structure needs to be replaced after multiple uses.
[0004] For soft sealing structures, during the process of one sealing component being inserted into another sealing component that cooperates with it, the soft sealing structure (for example, an O-ring) used between the two sealing components may fail (for example, deformed, damaged). However, even if the soft sealing structure fails, since the soft sealing structure will be inserted into another sealing component along with the sealing component, it is not possible to know whether the soft sealing structure has failed. If one wants to know whether the soft sealing structure has failed, one can only pull out the sealing component to confirm the soft sealing structure and then insert the sealing component again. However, the state of the soft sealing structure after reinserting the sealing component is still not known, so the sealing effect of the soft sealing structure cannot be well guaranteed.
[0005] Therefore, how to improve the sealing effect and make the sealing structure adaptable to multiple plugging and unplugging so as to reuse the sealing structure is a technical problem that technicians in this field urgently need to solve. Summary of the invention
[0006] The present application provides a short-stroke, highly reliable and reusable sealing structure to improve the sealing effect and enable the sealing structure to adapt to multiple plugging and unplugging so as to reuse the sealing structure.
[0007] In order to solve the above technical problems, this application provides the following technical solutions:
[0008] A short-stroke, highly reliable and reusable sealing structure comprises: a male head, a female head, a connecting sleeve, an inner sealing ring and an outer sealing ring; wherein a connecting cavity is formed in the tube wall of the connecting section of the female head, and the opening of the connecting cavity is located on the connecting end face of the female head, and the connecting section of the male head is inserted into the connecting cavity from the opening of the connecting cavity; the inner sealing ring and the outer sealing ring are located in the connecting cavity, and the inner sealing ring is located between the inner wall surface of the connecting section of the male head and the inner inner wall surface of the connecting cavity of the female head, and the outer sealing ring is located between the outer wall surface of the connecting section of the male head and the outer inner wall surface of the connecting cavity of the female head; the connecting sleeve has an assembly channel running through both ends, the exposed part of the connecting section of the male head and the connecting section of the female head are both 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 connecting section of the male head, and the connecting sleeve and the connecting section of the female head are detachably connected.
[0009] The short-stroke, highly reliable, reusable sealing structure as described above, wherein, preferably, the inner diameter of the docking section of the male head is larger than the inner diameters of the other pipe sections of the male head; the outer diameter of the outer wall of the docking cavity of the female head is larger than the outer diameters of the other pipe sections of the female head, and the inner diameter of the inner wall of the docking cavity of the female head is equal to the inner diameters of the other pipe sections of the female head and the inner diameters of the other pipe sections of the male head.
[0010] As described above, in the short-stroke, highly reliable and reusable sealing structure, preferably, the outer wall surface of the docking section of the male head has a first inwardly concave installation groove, and part of the outer sealing ring is located in the first installation groove.
[0011] As described above, in the short-stroke, highly reliable, and reusable sealing structure, preferably, the inner wall surface of the female connector's docking cavity has a second inwardly concave mounting groove, and a portion of the inner sealing ring is located in the second mounting groove.
[0012] As described above, in the short-stroke, highly reliable and reusable sealing structure, preferably, a chamfer is formed at the connection between the outer wall surface of the docking section of the male head and the docking end surface of the male head, and a chamfer is formed at the connection between the end surface of the inner wall of the docking cavity of the female head and the inner wall surface of the inner cavity of the female head.
[0013] The short-stroke, highly reliable and reusable sealing structure as described above, wherein, preferably, a plurality of docking cavities arranged from the inside to the outside are formed in the tube wall of the docking section of the female head, the male head has a plurality of docking sections arranged from the inside to the outside, and a docking section of the male head is inserted into a docking cavity of the female head; an inner sealing ring and an outer sealing ring are provided in each docking cavity of the female head, and the inner sealing ring is located between the inner wall surface of the corresponding docking section of the male head and the inner inner wall surface of the corresponding docking cavity of the female head, and the outer sealing ring is located between the outer wall surface of the corresponding docking section of the male head and the outer inner wall surface of the corresponding docking cavity of the female head.
[0014] As described above, in the short-stroke, highly reliable, reusable sealing structure, preferably, the inner surface of the connecting sleeve has an internal thread, the outer wall surface of the docking cavity of the female head has an external thread, and the internal thread of the connecting sleeve is threadedly connected to the external thread of the female head to realize a detachable connection between the connecting section of the connecting sleeve and the female head.
[0015] As described above, in the short-stroke, highly reliable, reusable sealing structure, preferably, the outer wall surface of the docking section of the male head has a first positioning protrusion extending outward, and the first positioning protrusion is farther away from the docking end face of the male head than the first mounting groove; the first positioning protrusion is in abutment with the end face of the outer wall of the docking cavity of the female head.
[0016] As described above, in the short-stroke, highly reliable, reusable sealing structure, preferably, the outer surface of the first positioning protrusion is flush with the outer wall surface of the docking cavity of the female head, or the outer surface of the first positioning protrusion is lower than the outer wall surface of the docking cavity of the female head.
[0017] As described above, in the short-stroke, highly reliable, reusable sealing structure, preferably, a second positioning protrusion extends inwardly from the positioning end of the connecting sleeve, and the front end surface of the second positioning protrusion contacts and presses against the rear end surface of the first positioning protrusion to limit the male head clamping.
[0018] Compared with the above-mentioned background technology, since the connection between the male and female heads of the sealing structure of the present application is bent many times, the sealing effect can be improved, and since the connection between the male and female heads is bent many times, the length of the sealing section between the male and female heads can be made shorter, so the sealing structure of the present application is a short-stroke structure, which is conducive to the final assembly layout, reduces the structural mass, 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 failing after insertion can be reduced, so that the sealing effect of the sealing structure of the application is better, and it can be suitable for high-pressure gas and liquid pipeline docking sealing; in addition, since the sealing structure of the present application uses a soft sealing structure such as a sealing ring, compared with a hard sealing structure, replacement requires cutting of the head, welding, pickling, and the entire pipeline needs to be removed. The sealing structure of the present application can adapt 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, and there is no need to remove the entire pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.
[0020] Figure 1It is a three-dimensional diagram of the short-stroke, highly reliable and reusable sealing structure of the present application;
[0021] Figure 2 is a cross-sectional view of the short-stroke, highly reliable and reusable sealing structure of the present application;
[0022] Figure 3 It is a three-dimensional diagram of the male head of the short-stroke, highly reliable and reusable sealing structure of the present application;
[0023] Figure 4 It is a cross-sectional view of the male head of the short-stroke, high-reliability, reusable sealing structure of the present application;
[0024] Figure 5 It is a three-dimensional diagram of the female head of the short-stroke, highly reliable and reusable sealing structure of the present application;
[0025] Figure 6 It is a cross-sectional view of the female head of the short-stroke, high-reliability, reusable sealing structure of the present application. DETAILED DESCRIPTION
[0026] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. In addition, spatial relationship terms such as "upper", "lower", "left", "right", "front", "back", etc. are used to facilitate the description to explain the positional relationship between two components. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and are not to be construed as limitations on the present application.
[0027] like Figures 1 to 6 As shown, the present application provides a short-stroke, highly reliable, and reusable sealing structure, including: a male head 110 , a female head 120 , a connecting sleeve 130 , an inner sealing ring 140 , and an outer sealing ring 150 .
[0028] Among them, the male head 110 has a flow channel running through both ends, and the female head 120 has a flow channel running through both ends, so that after the docking section of the male head 110 and the docking section of the female head 120 are docked and connected, the medium flows through the flow channel of the male head 110 and the flow channel of the female head 120.
[0029] A docking cavity is formed in the tube wall of the docking section of the female head 120, and the opening of the docking cavity is located on the docking end face of the female head 120; the docking section of the male head 110 is inserted into the docking cavity of the female head 120 from the opening of the docking cavity; the inner sealing ring 140 and the outer sealing ring 150 are located in the docking cavity of the female head 120, and the inner sealing ring 140 is located between the inner wall surface of the docking section of the male head 110 and the inner inner wall surface of the docking cavity of the female head 120, and the outer sealing ring 150 is located between the outer wall surface of the docking section of the male head 110 and the outer inner wall surface of the docking cavity of the female head 120.
[0030] Optionally, the pipe wall of the docking section of the male connector 110 expands outward, that is, the inner diameter of the docking section of the male connector 110 is larger than the inner diameter of other pipe sections of the male connector 110, so that after the docking section of the male connector 110 is inserted into the docking cavity of the female connector 120, the inner diameter of other pipe sections of the male connector 110 can be ensured to be equal to the inner diameter of the docking section of the female connector 120, thereby ensuring that the inner wall of the flow channel is flat and smooth. Optionally, the outer wall surface of the docking section of the male connector 110 has a first mounting groove that is concave inward, and part of the outer sealing ring 150 is located in the first mounting groove, thereby playing a certain limiting role on the outer sealing ring 150, and preventing the outer sealing ring 150 from shifting, deforming, etc. when the docking section of the male connector 110 is inserted into the docking cavity of the female connector 120. Optionally, the outer wall surface of the docking section of the male connector 110 has a first positioning protrusion extending outward, and the first positioning protrusion is farther away from the docking end face of the male connector 110 than the first mounting groove. After the docking section of the male connector 110 is inserted into the docking cavity of the female connector 120, the first positioning protrusion is abutted against the end face of the outer wall of the docking cavity of the female connector 120, thereby limiting the position of the female connector 120 and further playing a sealing role.
[0031] Optionally, the outer wall of the docking cavity of the female head 120 expands outward, that is, the outer diameter of the outer wall of the docking cavity of the female head 120 is larger than the outer diameters of other pipe sections of the female head 120, while the inner wall of the docking cavity of the female head 120 remains flush with the other pipe sections of the female head 120, that is, the inner diameter of the inner wall of the docking cavity of the female head 120 is equal to the inner diameters of other pipe sections of the female head, so that after the docking section of the male head 110 is inserted into the docking cavity of the female head 120, it can be ensured that the inner diameters of the docking section of the female head 120 and the other pipe sections are equal to the inner diameters of other pipe sections of the male head 110, thereby ensuring that the inner wall of the flow channel is flat and smooth. Also optionally, the inner wall surface of the inner side of the docking cavity of the female head 120 has a second installation groove that is concave inward, and part of the inner sealing ring 140 is located in the second installation groove, thereby playing a certain limiting role on the inner sealing ring 140, preventing the inner sealing ring 140 from shifting, deforming, etc. when the docking section of the male head 110 is inserted into the docking cavity of the female head 120.
[0032] On the basis of the above, a plurality of docking cavities arranged from the inside to the outside are formed in the tube wall of the docking section of the female head 120, and the opening of each docking cavity is located on the docking end face of the female head 120; the male head 110 has a plurality of docking sections arranged from the inside to the outside, and a docking section of the male head 110 is inserted into a docking cavity of the female head 120; an inner sealing ring 140 and an outer sealing ring 150 are provided in each docking cavity of the female head 120, and the inner sealing ring 140 is located between the inner wall surface of the corresponding docking section of the male head 110 and the inner inner wall surface of the corresponding docking cavity of the female head 120, and the outer sealing ring 150 is located between the outer wall surface of the corresponding docking section of the male head 110 and the outer inner wall surface of the corresponding docking cavity of the female head 120.
[0033] In addition, the connection between the outer wall surface of the docking section of the male connector 110 and the docking end surface of the male connector 110 forms a chamfer 170, and the connection between the end surface of the inner wall of the docking cavity of the female connector 120 and the inner wall surface of the docking cavity of the female connector 120 forms a chamfer 160. Optionally, the chamfer 170 of the male connector 110 and the chamfer 160 of the female connector 120 can be rounded or beveled. Figure 1 The chamfers 160 and 170 shown in FIG. 1 are both oblique angles.
[0034] The connecting sleeve 130 has an assembly channel running through both ends. The exposed part of the docking section of the male head 110 and the docking section of the female head 120 are both 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 docking section of the male head 110. The connecting section of the connecting sleeve 130 and the female head 120 are detachably connected, thereby connecting the male head 110 and the female head 120 together.
[0035] Optionally, the inner surface of the connecting sleeve 130 has an internal thread, and the outer wall surface of the docking 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 between the connecting sleeve 130 and the connecting section of the female head 120. Optionally, the outer surface of the first positioning protrusion is flush with the outer wall surface of the docking cavity of the female head 120, or the outer surface of the first positioning protrusion is lower than the outer wall surface of the docking cavity of the female head 120, so as to avoid the first positioning protrusion from hindering the connection between the connecting sleeve 130 and the female head 120. Optionally, the positioning end of the connecting sleeve 130 extends inward with a second positioning protrusion, and the front end surface of the second positioning protrusion contacts and presses against the rear end surface of the first positioning protrusion, so as to limit the clamping of the male head 110.
[0036] When using the short-stroke, highly reliable, and reusable sealing structure of the present application, first place the inner sealing ring 140 in the second mounting groove, place the outer sealing ring 150 in the first mounting groove, and then insert the docking section of the male head 110 into the docking cavity of the female head 120, and insert the connected male head 110 and female head 120 into the assembly channel of the connecting sleeve 130, so that the connecting sleeve 130 clamps the male head 110 and makes the connecting sleeve 130 and the female head 120 detachably connected, thereby completing the assembly of the short-stroke, highly reliable, and reusable sealing structure of the present application.
[0037] The assembled short-stroke, highly reliable, reusable sealing structure has a connection between the male head 110 and the female head 120 that has been bent multiple times, thereby improving the sealing effect; and because the connection between the male head 110 and the female head 120 has been bent multiple times, the length of the sealing section between the male head 110 and the female head 120 can be shortened. Therefore, the sealing structure of the present application is a short-stroke structure, which is conducive to the final assembly layout, reduces the structural mass, and improves the rocket carrying capacity.
[0038] 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 failing after insertion can be reduced, thereby achieving better sealing effect; and, even if the inner ring seal fails, the medium needs to bypass the first bend and then pass through the outer sealing ring, and the outer sealing ring can prevent gas and liquid from overflowing again; and when the sealing structure of the present application is deformed axially and radially (in a harsh working environment), the sealing ring is always in a compressed state, and can compensate for the effects of the deformation axially and radially, and can always be in contact with the sealing surface. Unlike the current arrow ball head or double-step seal, the sealing effect of the sealing surface will not be reduced due to deformation, thereby causing leakage.
[0039] Since the sealing structure of the present application has a good sealing effect, the sealing structure of the present application can be applied to the butt sealing of high-pressure gas and liquid pipelines.
[0040] In addition, since the sealing structure in the present application uses a soft sealing structure such as a sealing ring, compared to a hard sealing structure, replacement requires cutting the head, welding, and pickling, and the entire pipeline needs to be removed. The sealing structure of the present application can adapt to multiple plugging and unplugging. After plugging and unplugging, only the sealing ring needs to be replaced, so that the sealing structure can be reused, and the plugging and unplugging installation is convenient without removing the entire pipeline.
[0041] Since the sealing effect of the sealing structure of the present application is good, it is suitable for the docking sealing of high-pressure gas and liquid pipelines, and the sealing structure is a short-stroke structure, which is conducive to the assembly layout and can be reused. Therefore, the sealing structure of the present application can be used in related pipelines in reusable rockets that need to be plugged in and out multiple times. Not only does it not reduce the sealing performance (only the sealing ring needs to be replaced), it can also reduce the cost of the rocket.
[0042] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application. Any figure mark in the claims should not be regarded as limiting the claim involved.
[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A short-stroke, highly reliable and reusable sealing structure, characterized in that: include: Male connector, female connector, connecting sleeve, inner sealing ring and outer sealing ring; Wherein, a docking cavity is formed in the tube wall of the docking section of the female head, and the opening of the docking cavity is located on the docking end face of the female head, and the docking section of the male head is inserted into the docking cavity from the opening of the docking cavity; The inner sealing ring and the outer sealing ring are located in the docking cavity, and the inner sealing ring is located between the inner wall surface of the docking section of the male head and the inner inner wall surface of the docking cavity of the female head, and the outer sealing ring is located between the outer wall surface of the docking section of the male head and the outer inner wall surface of the docking cavity of the female head; The connecting sleeve has an assembly channel running through both ends. The exposed part of the male butt joint section and the female butt joint section are both 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 male butt joint section. The connecting sleeve and the connecting section of the female head are detachably connected.
2. The short-stroke, highly reliable and reusable sealing structure according to claim 1, characterized in that: The inner diameter of the butt joint section of the male connector is larger than the inner diameter of the other pipe sections of the male connector; The outer diameter of the outer wall of the female connector cavity is greater than the outer diameter of the other pipe sections of the female connector, and the inner diameter of the inner wall of the female connector cavity is equal to the inner diameters of the other pipe sections of the female connector and the other pipe sections of the male connector.
3. The short-stroke, highly reliable and reusable sealing structure according to claim 1 or 2, characterized in that: The outer wall surface of the butt joint section of the male connector has a first mounting groove which is concave inwards, and a portion of the outer sealing ring is located in the first mounting groove.
4. The short-stroke, highly reliable and reusable sealing structure according to claim 3 is characterized in that: The inner wall surface of the female connector's docking cavity is provided with an inwardly concave second mounting groove, and a portion of the inner sealing ring is located in the second mounting groove.
5. The short-stroke, highly reliable and reusable sealing structure according to claim 1 or 2, characterized in that: The connection between the outer wall surface of the male connector's docking section and the male connector's docking end surface forms a chamfer, and the connection between the end surface of the inner wall of the female connector's docking cavity and the inner wall surface of the female connector's docking cavity forms a chamfer.
6. The short-stroke, highly reliable and reusable sealing structure according to claim 1 or 2, characterized in that: A plurality of docking cavities arranged from the inside to the outside are formed in the tube wall of the docking section of the female head, and the male head has a plurality of docking sections arranged from the inside to the outside, and one docking section of the male head is inserted into one docking cavity of the female head; An inner sealing ring and an outer sealing ring are provided in the docking cavity of each female head, and the inner sealing ring is located between the inner wall surface of the corresponding docking section of the male head and the inner inner wall surface of the corresponding docking cavity of the female head, and the outer sealing ring is located between the outer wall surface of the corresponding docking section of the male head and the outer inner wall surface of the corresponding docking cavity of the female head.
7. The short-stroke, highly reliable and reusable sealing structure according to claim 1 or 2, characterized in that: The inner surface of the connecting sleeve has an internal thread, and the outer wall surface of the docking cavity of the female head has an external thread. The internal thread of the connecting sleeve is threadedly connected with the external thread of the female head to realize a detachable connection between the connecting section of the connecting sleeve and the female head.
8. The short-stroke, highly reliable and reusable sealing structure according to claim 3, characterized in that: The outer wall surface of the butt joint section of the male connector has a first positioning protrusion extending outward, and the first positioning protrusion is farther away from the butt joint end surface of the male connector than the first mounting groove; The first positioning protrusion is in abutment with the end surface of the outer wall of the docking cavity of the female connector.
9. The short-stroke, highly reliable and reusable sealing structure according to claim 8, characterized in that: The outer surface of the first positioning protrusion is flush with the outer wall surface of the docking cavity of the female head, or the outer surface of the first positioning protrusion is lower than the outer wall surface of the docking cavity of the female head.
10. The short-stroke, highly reliable and reusable sealing structure according to claim 8, characterized in that: A second positioning protrusion extends inwardly from the positioning end of the connecting sleeve, and the front end surface of the second positioning protrusion contacts and presses tightly with the rear end surface of the first positioning protrusion to limit the position of the male head.