CN224049869U - Sealing connecting piece of polycrystalline alumina fiber pipe and high-temperature furnace - Google Patents
Sealing connecting piece of polycrystalline alumina fiber pipe and high-temperature furnaceInfo
- Publication number
- CN224049869U CN224049869U CN202521370145.0U CN202521370145U CN224049869U CN 224049869 U CN224049869 U CN 224049869U CN 202521370145 U CN202521370145 U CN 202521370145U CN 224049869 U CN224049869 U CN 224049869U
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- sealing
- polycrystalline alumina
- connection
- ring
- fiber tube
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Abstract
本申请提出一种多晶氧化铝纤维管的密封连接件及高温炉窑。多晶氧化铝纤维管的密封连接件包括公接头和母接头，公接头包括外螺纹段、限位凸台及纤维管连接段；母接头包括密封台、内螺纹段及纤维管套连接段；公接头与所述母接头通过外螺纹和内螺纹旋合连接并保证限位凸台嵌入所述密封台的密封槽内；限位凸台与密封槽之间的双层密封结构包括内层柔性密封环和外层弹性缓冲环。本装置在密封槽与限位凸台的间隙还填充了双层密封结构，通过内层柔性密封环和外层弹性缓冲环的配合填充限位了限位凸台与密封槽的微观间隙阻断泄漏通道；外层弹性缓冲环通过波峰波谷弹性变形补偿热膨胀或振动导致的间隙变化，维持长期预紧力，形成的双保险密封。
This application discloses a sealing connector for polycrystalline alumina fiber tubes and a high-temperature furnace. The sealing connector for polycrystalline alumina fiber tubes includes a male connector and a female connector. The male connector includes an external thread section, a limiting boss, and a fiber tube connecting section; the female connector includes a sealing platform, an internal thread section, and a fiber tube sleeve connecting section. The male connector and the female connector are screwed together by the external and internal threads, ensuring that the limiting boss is embedded in the sealing groove of the sealing platform. The double-layer sealing structure between the limiting boss and the sealing groove includes an inner flexible sealing ring and an outer elastic buffer ring. This device also fills the gap between the sealing groove and the limiting boss with a double-layer sealing structure. The inner flexible sealing ring and the outer elastic buffer ring cooperate to fill and limit the microscopic gap between the limiting boss and the sealing groove, blocking the leakage channel; the outer elastic buffer ring compensates for gap changes caused by thermal expansion or vibration through the elastic deformation of the crests and troughs, maintaining long-term preload, forming a double-insurance seal.
Description
Technical Field
The utility model relates to a sealing connecting piece of a polycrystalline alumina fiber pipe and a high-temperature furnace, belonging to the technical field of pipeline connection of high-temperature furnaces.
Background
The polycrystalline alumina fiber tube is widely applied to high-temperature industrial equipment, such as a high-temperature furnace kiln, a heat exchanger and the like, because of the characteristics of high temperature resistance, corrosion resistance and the like, and is mainly used for transmitting high-temperature gas, high-temperature molten metal and other mediums. Because the connection structure of the fiber pipe needs to be kept sealed for a long time in a high temperature, high vibration or thermal expansion environment to prevent medium leakage, the stability of the connection structure is extremely high, because the fiber pipe is made of certain materials and is easy to break when stress is concentrated, therefore, a connecting piece is required to be arranged to complete the connection of the pipeline, the sealing performance, the reliability and the structural suitability of the connecting piece are required to be considered, the single sealing structure of the traditional connecting piece is attenuated in the high temperature elastic connection structure to cause part aging and service life shortening, and therefore, the existing fiber pipe sealing structure needs to be further improved and perfected.
Disclosure of utility model
In view of the above-mentioned shortcomings of the prior art, the present utility model aims to provide a sealing connector for polycrystalline alumina fiber tubes and a high-temperature kiln.
According to the first scheme, the sealing connecting piece of the polycrystalline alumina fiber pipe comprises a male connector and a female connector which are connected in a matched mode, wherein the male connector is connected with the end part of the fiber pipe A, and the female connector is connected with the end part of the fiber pipe B;
The male connector is of a stepped shaft structure and comprises an external thread section, a limiting boss and a fiber pipe connecting section;
The female connector is of a stepped cylinder structure and comprises a sealing table, an internal thread section and a fiber pipe sleeve connecting section;
The outer side of the male joint is provided with an external thread, the inner side of the female joint is provided with an internal thread matched with the external thread, and the male joint and the female joint are connected through the external thread and the internal thread in a screwing way and ensure that the limit boss is embedded into the sealing groove of the sealing table;
a double-layer sealing structure is arranged between the limiting boss and the sealing groove and comprises an inner-layer flexible sealing ring and an outer-layer elastic buffer ring.
Further, the fiber pipe connecting section of the male connector is in interference fit connection with the outer wall or the inner wall of the fiber pipe A, and the fiber pipe sleeve connecting section of the female connector is in interference fit connection with the outer wall or the inner wall of the fiber pipe B.
Further, the limiting boss is an annular boss, the limiting boss is located between the external thread section and the fiber pipe connecting section, and the outer diameter of the limiting boss is larger than that of the external thread section.
Further, the inner wall of the sealing table is provided with a sealing groove, the sealing groove is an annular groove, and the inner diameter of the sealing groove is larger than the inner diameter of the internal thread.
Further, the inner flexible sealing ring is a high-temperature-resistant fiber felt pad body, and the high-temperature-resistant felt pad body is filled in radial gaps of the limiting boss and the sealing groove.
Further, the thickness of the high-temperature-resistant felt pad body is 0.5-2mm.
Further, the outer elastic buffer ring is a wave-shaped metal ring, and the wave crest of the wave-shaped metal ring is contacted with the inner wall of the sealing groove, and the wave trough is contacted with the outer wall of the limiting boss.
Further, the wavy metal ring and the inner flexible sealing ring are integrated, and the wave crest and the wave trough of the wavy metal ring slightly protrude out of the surface of the inner flexible sealing ring in a non-pressure state.
Further, an annular limiting table is arranged at the tail end of the internal thread section of the female joint, and the inner diameter of the annular limiting table is smaller than that of the sealing table so as to limit the axial compression amount of the wavy metal ring.
According to an embodiment of the present utility model, with the sealing connection of the polycrystalline alumina fiber tube in the first aspect provided by the present utility model, there is provided a second aspect of:
A high temperature kiln comprising a sealing connection for a polycrystalline alumina fibre tube of any of the above.
Compared with the prior art, the technical scheme provided by the application has the unique beneficial effects that:
The male connector and the female connector of the sealing connector are additionally provided with the matching structure of the sealing groove and the limiting boss, so that the sealing performance and the stability of connection are further enhanced, in particular, a double-layer sealing structure is further filled in a gap between the sealing groove and the limiting boss, a microscopic gap between the limiting boss and the sealing groove is filled and limited through matching of an inner flexible sealing ring and an outer elastic buffer ring to block a leakage channel, and the outer elastic buffer ring compensates gap change caused by thermal expansion or vibration through elastic deformation of wave crests and wave troughs to maintain long-term pretightening force, so that double-insurance sealing is formed. The inner layer felt pad body is high-temperature resistant, the outer layer metal ring is fatigue resistant, and the sealing element can adapt to high temperature of 1000-1600 ℃ and periodic expansion and contraction, and the service life of the sealing element is prolonged. The male connector and the female connector adopt a stepped shaft/barrel structure, and are connected with the fiber pipes through interference fit, so that the connection strength is ensured, the stress is dispersed, and the fiber pipes are prevented from being broken due to overlarge local stress.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Wherein:
FIG. 1 is a schematic illustration of the seal connection of a polycrystalline alumina fiber tube according to one embodiment;
FIG. 2 is a partial schematic view of a double layer seal structure in one embodiment;
FIG. 3 is a schematic view of the structure of the locking ring outside the sealing land of the female joint in one embodiment.
Reference numerals:
10-male connector, 11-external thread section, 111-external thread, 12-limit boss, 13-fiber tube connecting section, 14-fiber tube A, 20-female connector, 21-sealing table, 212-locking sleeve, 213-locking piece, 211-sealing groove, 22-internal thread section, 221-internal thread, 23-fiber tube connecting section, 24-fiber tube B, 30-outer elastic buffer ring, 31-crest, 32-trough and 40-inner flexible sealing ring.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Examples
The technical problem solved by the embodiment is that the polycrystalline alumina fiber tube is widely applied to high-temperature industrial equipment, such as a high-temperature furnace kiln, a heat exchanger and the like, and is mainly used for transmitting high-temperature gas, high-temperature molten metal and other mediums because of the characteristics of high temperature resistance, corrosion resistance and the like. Because the connection structure of the fiber pipe needs to be kept sealed for a long time in a high-temperature, high-vibration or thermal expansion environment to prevent medium leakage, the stability of the connection structure is extremely high, and because the fiber pipe is made of certain brittle materials and is easy to break when stress is concentrated, a connecting piece is needed to complete connection of the pipeline, the sealing performance, the reliability and the structural suitability of the connecting piece are considered, and the single sealing structure of the traditional connecting piece can lead to part aging and shortened service life due to the attenuation of the high-temperature elastic connection structure.
In order to solve the above technical problems, as shown in fig. 1, the present embodiment provides a sealing connector for a polycrystalline alumina fiber pipe, which includes a male connector 10 and a female connector 20 that are cooperatively connected with each other, wherein the male connector 10 is connected with an end of a fiber pipe a14, and the female connector 20 is connected with an end of a fiber pipe B24;
The male connector 10 is of a stepped shaft structure, and the male connector 10 comprises an external thread section 11, a limiting boss 12 and a fiber pipe connecting section 13;
The female connector 20 is of a stepped cylinder structure, and the female connector 20 comprises a sealing table 21, an internal thread section 22 and a fiber pipe sleeve connecting section 23;
The outer side of the external thread section 11 of the male connector 10 is provided with external threads 111, the inner side of the internal thread section 22 of the female connector 20 is provided with internal threads 221 matched with the external threads 111, the male connector 10 and the female connector 20 are connected in a screwing way through the external threads 111 and the internal threads 221, and the limit boss 12 is ensured to be embedded into the seal groove 211 of the seal table 21;
A double-layer sealing structure is arranged between the limiting boss 12 and the sealing groove 211, and comprises an inner-layer flexible sealing ring 40 and an outer-layer elastic buffer ring 30.
Specifically, the fiber pipe connecting section 13 of the male connector 10 is in interference fit connection with the outer wall or the inner wall of the fiber pipe a14, and the fiber pipe sleeve connecting section 23 of the female connector 20 is in interference fit connection with the outer wall or the inner wall of the fiber pipe B24.
Specifically, the limiting boss 12 of the male connector 10 is an annular boss, the limiting boss 12 is located between the external thread section 11 and the fiber pipe connecting section 13, and the outer diameter of the limiting boss 12 is larger than that of the external thread section 11.
Specifically, a seal groove 211 is provided on the inner wall of the seal table 21 of the female connector 20, the seal groove 211 is an annular groove, and the inner diameter of the seal groove 211 is larger than the inner diameter of the internal thread 221.
Specifically, the double-layer sealing structure includes an inner flexible sealing ring 40 and an outer elastic buffer ring 30.
The inner flexible seal ring 40 is a high temperature resistant fibrous felt body that fills in the radial gap between the limit boss 12 and the seal groove 211. The thickness of the high-temperature-resistant felt pad body is 0.5-2mm. Specifically, high-temperature-resistant and corrosion-resistant polycrystalline alumina fibers can be selected, the high-temperature-resistant parameters are more than 1600 ℃, the fibers are interwoven to form a porous structure, and the porosity is more than 60%. The flexible material of the polycrystalline alumina fiber can be attached to the minor processing defects of the limit boss 12 and the seal groove 211, such as surface roughness and radial error to block leakage channels of gas and liquid, and when the thermal expansion of the part is uneven at high temperature, the elasticity of the fiber blanket can absorb part of deformation stress, so that structural damage caused by collision of a rigid structure is avoided.
The outer layer elastic buffer ring is made of stainless steel or other alloy materials, has high temperature resistance of at least 800 ℃, and has high elastic modulus and fatigue resistance. The outer elastic buffer ring 30 is a wave-shaped metal ring, the wave crest 31 of the wave-shaped metal ring is contacted with the inner wall of the sealing groove 211, and the wave trough 32 is contacted with the outer wall of the limiting boss 12.
Specifically, the wave-shaped section can select the height of the wave crest 31 to be 0.5-1 mm and the wave distance to be 2-3 mm, and the wave crest 31 and the wave trough 32 provide pretightening force through elastic deformation to compensate axial/radial displacement of the part caused by vibration or thermal expansion and contraction.
An annular limiting table is arranged at the tail end of the internal thread section 22 of the female joint 20, and the inner diameter of the annular limiting table is smaller than that of the sealing table 21 so as to limit the axial compression amount of the wavy metal ring. The left side of the outer layer contacts the annular limiting table of the female connector 20 to limit the excessive compression of the annular limiting table and avoid elastic failure.
As shown in fig. 2, the double-layer sealing structure may be configured such that the wavy metal ring and the inner flexible sealing ring 40 are integrated, and the crests 31 and the troughs 32 of the wavy metal ring slightly protrude from the surface of the inner flexible sealing ring 40 in the non-pressure state. The integral double-layer sealing structure has stronger integral stability under the action of pressure.
As shown in fig. 3, a locking sleeve 212 may be sleeved on the outer side of the double-layer sealing structure, that is, the outer side of the sealing platform 21 of the female connector 20, and fastening is achieved through matching of locking pieces 213, that is, screws, bolts and other components.
The male connector 10 and the female connector 20 of the sealing connector are additionally provided with the matching structure of the sealing groove 211 and the limiting boss 12, so that the tightness and stability of connection are further enhanced, in particular, a double-layer sealing structure is further filled in a gap between the sealing groove 211 and the limiting boss 12, a microscopic gap between the limiting boss 12 and the sealing groove 211 is limited by the matching of the inner flexible sealing ring 40 and the outer elastic buffer ring 30, a leakage channel is blocked, and the outer elastic buffer ring 30 elastically deforms through the wave crest 31 and the wave trough 32 to compensate gap change caused by thermal expansion or vibration, so that long-term pretightening force is maintained, and double-insurance sealing is formed. The inner layer felt pad body is high-temperature resistant, the outer layer metal ring is fatigue resistant, and the sealing element can adapt to high temperature of 1000-1600 ℃ and periodic expansion and contraction, and the service life of the sealing element is prolonged. The male and female connectors 20 adopt a stepped shaft/barrel structure, and connect the fiber tubes through interference fit, so that the connection strength is ensured, the stress is dispersed, and the fiber tubes are prevented from being broken due to overlarge local stress.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element, or be directly connected or indirectly connected to the other element when the element is referred to as being "connected" to the other element. It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the application to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the application, are included in the spirit and scope of the application which is otherwise, without departing from the spirit or scope thereof.
Claims (10)
1. The utility model provides a sealing connection spare of polycrystalline alumina fiber tube, includes male joint and the female joint of mutually supporting connection, male joint and fiber tube A's end connection, female joint and fiber tube B's end connection, its characterized in that:
The male connector is of a stepped shaft structure and comprises an external thread section, a limiting boss and a fiber pipe connecting section;
The female connector is of a stepped cylinder structure and comprises a sealing table, an internal thread section and a fiber pipe sleeve connecting section;
The outer side of the male joint is provided with an external thread, the inner side of the female joint is provided with an internal thread matched with the external thread, and the male joint and the female joint are connected through the external thread and the internal thread in a screwing way and ensure that the limit boss is embedded into the sealing groove of the sealing table;
a double-layer sealing structure is arranged between the limiting boss and the sealing groove and comprises an inner-layer flexible sealing ring and an outer-layer elastic buffer ring.
2. The sealing connection of polycrystalline alumina fiber tubes according to claim 1, wherein the fiber tube connecting section of the male connector is in interference fit connection with the outer wall or the inner wall of the fiber tube a, and the fiber tube sleeve connecting section of the female connector is in interference fit connection with the outer wall or the inner wall of the fiber tube B.
3. The sealing connection of a polycrystalline alumina fiber tube according to claim 1, wherein the spacing boss is an annular boss, the spacing boss is located between the external thread section and the fiber tube connection section, and the outer diameter of the spacing boss is greater than the outer diameter of the external thread section.
4. The sealing connection of a polycrystalline alumina fiber tube according to claim 1, wherein the inner wall of the sealing land is provided with a sealing groove, the sealing groove being an annular groove, the inner diameter of the sealing groove being larger than the inner diameter of the internal thread.
5. The sealing connection of polycrystalline alumina fiber tubes according to claim 1, wherein the inner flexible sealing ring is a high temperature resistant fiber blanket body filled in the radial gap of the limit boss and the seal groove.
6. The sealing connection of polycrystalline alumina fiber tubes according to claim 5, wherein the refractory felt body has a thickness of 0.5-2mm.
7. The sealing connection of a polycrystalline alumina fiber tube according to claim 1, wherein the outer elastic buffer ring is a wave-shaped metal ring, and the wave peaks of the wave-shaped metal ring are in contact with the inner wall of the sealing groove and the wave troughs are in contact with the outer wall of the limiting boss.
8. The seal connection of the polycrystalline alumina fiber pipe according to claim 7, wherein the wavy metal ring is integrated with the inner flexible seal ring, and the peaks and the valleys of the wavy metal ring slightly protrude from the surface of the inner flexible seal ring in the non-pressure state.
9. The sealing connection of a polycrystalline alumina fiber tube according to claim 8, wherein the female joint is provided with an annular stop at the end of the internal thread section, the annular stop having an inner diameter smaller than the inner diameter of the sealing stop to limit the axial compression of the corrugated metal ring.
10. A high temperature kiln comprising a sealing connection of polycrystalline alumina fibre tubes according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202521370145.0U CN224049869U (en) | 2025-07-01 | 2025-07-01 | Sealing connecting piece of polycrystalline alumina fiber pipe and high-temperature furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202521370145.0U CN224049869U (en) | 2025-07-01 | 2025-07-01 | Sealing connecting piece of polycrystalline alumina fiber pipe and high-temperature furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN224049869U true CN224049869U (en) | 2026-03-27 |
Family
ID=99213913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202521370145.0U Active CN224049869U (en) | 2025-07-01 | 2025-07-01 | Sealing connecting piece of polycrystalline alumina fiber pipe and high-temperature furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN224049869U (en) |
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2025
- 2025-07-01 CN CN202521370145.0U patent/CN224049869U/en active Active
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