CN115031064B - Pipeline sealing ring with self-sealing function and sealing method - Google Patents
Pipeline sealing ring with self-sealing function and sealing method Download PDFInfo
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- CN115031064B CN115031064B CN202210011727.4A CN202210011727A CN115031064B CN 115031064 B CN115031064 B CN 115031064B CN 202210011727 A CN202210011727 A CN 202210011727A CN 115031064 B CN115031064 B CN 115031064B
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- sealing
- sealing ring
- self
- pipeline
- ring
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
- F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/20—Double-walled hoses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose-connectors, i.e. single members engaging both hoses
- F16L33/01—Arrangements for connecting hoses to rigid members; Rigid hose-connectors, i.e. single members engaging both hoses specially adapted for hoses having a multi-layer wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/065—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket, the sealing rings being placed previously on the male part
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Sleeves (AREA)
Abstract
The invention discloses a pipeline sealing ring with a self-sealing function and a sealing method, which are characterized by comprising a sealing ring (18), wherein the sealing ring (18) is divided into an outer surface and an inner surface, a first bonding surface (3) is arranged on the outer surface of the sealing ring (18) close to an end surface (1), more than 1 circumferential grooves (14) are arranged behind the first bonding surface (3), more than 1 outer sealing surface is arranged on the outer surface of the sealing ring (18) behind the circumferential grooves (14), and more than 1 inner sealing surface is arranged on the inner surface of the sealing ring (18). The pipeline sealing ring with the self-sealing function positively utilizes sediment accumulation flowing in the pipe network to realize self-sealing at the pipeline connection part through the design of the self-sealing structure, thereby avoiding the damage of the pipeline sealing connection of the sediment flowing in the pipe network; the larger the pressure of sediment accumulated at the self-sealing structure in the pipe network, the better the axial isobaric self-sealing effect at the connecting position of the pipeline.
Description
Technical Field
The invention relates to a pipeline sealing ring with a self-sealing function and a sealing method, and belongs to the technical field of pipeline sealing.
Background
The plastic double-wall corrugated pipeline is widely applied to various large drainage and irrigation pipe network systems, and is produced continuously through extrusion molding, and the connection among the pipelines is mainly socket connection. The two ends of the corresponding pipelines are respectively provided with a faucet and a socket plug, and the faucet and the socket plug are matched and plugged to realize quick connection between the pipelines. The bell and spigot and the spigot are extruded with the pipe body into a whole, and the bell and spigot connection is adopted, namely, a rubber sealing ring is sleeved in the trough of the spigot and spigot, then the spigot and spigot are inserted into the bell and spigot, and the radial sealing of the plastic double-wall corrugated pipe at the bell and spigot is realized through elastic deformation of the rubber sealing ring in the trough of the spigot and spigot. However, along with the lapse of time, the silt that sewage that flows in the pipe network contained can pile up in rubber seal circle department, by the radial seal position of pipeline axial extrusion rubber seal circle, and silt pile up the extrusion force and can become greater and greater along with the lapse of time, cause the sealing washer axial deformation to slide, will finally lead to the pipe network to reveal in hookup location department, cause the pipeline connection failure, seriously influence the normal operating of pipe network system.
Chinese patent CN105041837a discloses a double-layer bellows with seal, comprising an inner bellows and an outer bellows, the inner bellows and the outer bellows have the same structure, the inner bellows comprises a bellows ring, two ends of the bellows ring are provided with extension rings, a seal sleeve is arranged on the outer ring of the inner bellows, the seal sleeve comprises a seal sleeve body, and a plurality of seal ring gears are arranged inside the seal sleeve body; the large resilience force can be realized through the design of the double-layer corrugated pipe, and foreign matters such as external silt are prevented from entering the inside through the sealing sleeve. Such a structure will penetrate into the pipeline as more and more sediment is deposited
Disclosure of Invention
The invention aims to provide a pipeline sealing ring with a self-sealing function and a sealing method, which utilize sediment accumulation flowing in a pipe network to realize self-sealing of a pipeline connection part, and simultaneously have a plurality of sealing parts and better effect.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a pipeline sealing washer with self sealss function, includes the sealing washer, and the sealing washer divide into surface and internal surface, is equipped with first faying surface on the surface that the sealing washer leaned on the terminal surface, is equipped with more than 1 circumferential groove behind the first faying surface, is equipped with more than 1 outer sealing surface on the sealing washer surface behind the circumferential groove, is equipped with more than 1 inner sealing surface on the sealing washer internal surface.
The pipeline sealing ring with the self-sealing function is characterized in that a sediment flow channel is arranged on the first joint surface, one end of the sediment flow channel is communicated with the annular groove, and the other end of the sediment flow channel is communicated with the end face of the sealing ring.
The outer sealing surface is a first sealing surface, a second sealing surface or/and a third sealing surface.
The pipeline sealing ring with the self-sealing function is characterized in that the inner sealing surface is a fourth sealing surface, a fifth sealing surface or/and a sixth sealing surface.
The pipeline sealing ring with the self-sealing function is characterized in that a sealing convex edge is arranged on the inner surface of the sealing ring.
The pipeline sealing ring with the self-sealing function is characterized in that an annular bulge is arranged on the end face of the sealing ring.
The pipeline sealing ring with the self-sealing function is characterized in that the outer sealing surface and the inner sealing surface are more than 1 convex rings.
The sealing method of the pipeline sealing ring with the self-sealing function is characterized in that the sealing ring is in sealing connection with an installed pipeline through an outer sealing surface and an inner sealing surface, sediment flowing in from a sediment flow channel on a first joint surface of the sealing ring is accumulated in a circumferential groove, and the circumferential groove is extruded to elastically deform, so that the circumferential groove is close to the side wall of the pipeline, and self-sealing connection is realized.
According to the sealing method of the pipeline sealing ring with the self-sealing function, the sealing ring is in sealing connection with the installed pipeline through the outer sealing surface and the inner sealing surface of the 2-4 sections.
The beneficial effects of the invention are as follows:
1. the pipeline sealing ring with the self-sealing function positively utilizes sediment accumulation flowing in the pipe network to realize self-sealing at the pipeline connection part through the design of the self-sealing structure, thereby avoiding the damage of the pipeline sealing connection of the sediment flowing in the pipe network; the larger the pressure of sediment accumulated at the self-sealing structure in the pipe network, the better the axial isobaric self-sealing effect at the connecting position of the pipeline.
2. The pipeline sealing ring is provided with a plurality of seals on the inner surface and the outer surface, and realizes quick self-sealing installation between pipelines without changing the prior pipeline socket extrusion molding mode and the connecting mode.
Drawings
FIG. 1 is a schematic view of a self-sealing ring seal of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is an exploded view of the socket installation assembly of the self-sealing gasket of the present invention;
FIG. 4 is a schematic view, partially in section, of a self-sealing seal ring socket installation of the present invention;
FIG. 5 is a schematic view of the self-sealing gasket of the present invention being assembled into a socket;
fig. 6 is a schematic view of the self-sealing principle of the sealing ring of the present invention.
Reference numerals: 1. an end face; 2. a sediment flow path; 3. a first bonding surface; 4. the outer surface of the annular groove; 5. a first sealing surface; 6. a second sealing surface; 7. a third sealing surface; 8. the sealing ring is annular convex; 9. the inner surface of the annular bulge of the sealing ring; 10. A fourth sealing surface; 11. a fifth sealing surface; 12. a sixth sealing surface; 13. the inner surface of the annular groove; 14. a circumferential groove; 15. Sealing bead 16, double-walled corrugated tubing; 17. a pipe socket; 18. a seal ring; 19. a pipe socket; 20. sediment; 21. arrows of the flow direction of the sediment.
The invention is further described below with reference to the drawings and the detailed description, which are not to be regarded as limiting the invention.
Detailed Description
Example 1: the utility model provides a pipeline sealing washer with self sealss function, includes sealing washer 18, and sealing washer 18 divide into surface and internal surface, is equipped with first binding face 3 on the surface that sealing washer 18 leaned on terminal surface 1, is equipped with more than 1 circumferential groove 14 behind the first binding face 3, is equipped with more than 1 outer sealing face on the sealing washer 18 surface behind the circumferential groove 14, is equipped with more than 1 inner sealing face on sealing washer 18 internal surface. The shape of the seal ring 18 matches the shape of the double-walled corrugated tubing 16, typically hexagonal or circular, but may be corrugated tubing of other existing shapes.
The first joint surface 3 is provided with a sediment flow channel 2, one end of the sediment flow channel 2 is communicated with the annular groove 14, and the other end of the sediment flow channel is communicated with the end face 1 of the sealing ring and used for introducing sediment in a pipe network and accumulating in the annular groove 14.
The outer sealing surface is a first sealing surface 5, a second sealing surface 6 or/and a third sealing surface 7. The inner sealing surface is a fourth sealing surface 10, a fifth sealing surface 11 or/and a sixth sealing surface 12. The sealing effect of a plurality of positions is realized through the sealing surface of the 1 section or the plurality of ends.
The inner surface of the sealing ring 18 is provided with a sealing convex edge 15.
The end face 1 of the sealing ring 18 is provided with an annular bulge 8.
The outer sealing surface and the inner sealing surface are more than 1 convex rings. The sealing effect is realized through the convex ring.
According to the sealing method of the pipeline sealing ring with the self-sealing function, the sealing ring 18 is in sealing connection with an installed pipeline through the outer sealing surface and the inner sealing surface, meanwhile, sediment flowing in from the sediment flow channel 2 on the first joint surface 3 of the sealing ring 18 is accumulated in the annular groove 14, the annular groove 14 is extruded to elastically deform, and the annular groove 14 is close to the side wall of the pipeline to realize self-sealing connection.
The sealing ring 18 is in sealing connection with the installed pipeline through the outer sealing surface and the inner sealing surface of the 2-4 sections, and the sealing effect is better.
Example 2: the sealing ring 18 is a cylindrical structure, which consists of an outer surface and an inner surface, and is adapted to the socket 17 of the corresponding double-wall corrugated pipeline 16; the sealing ring 18 is provided with a self-sealing structure and a plurality of sealing structures; the self-sealing connection process of the sealing ring 18 is that after the sealing ring 18 is sleeved into the socket joint 17 of the double-wall corrugated pipe 16, the sealing ring is directly inserted into the socket joint 19 of the other double-wall corrugated pipe 16, so that quick self-sealing connection is realized.
The outer surface of the cylindrical structural sealing ring 18 is axially provided with a first joint surface 3, a first sealing surface 5, a second sealing surface 6 and a third sealing surface 7 which are respectively jointed and sealed with the inner wall surface of the bell and spigot 19 of the double-wall corrugated pipeline 16; the first joint surface 3 is close to the end surface 1 of the head part of the sealing ring, and a first sealing surface 5, a second sealing surface 6 and a third sealing surface 7 are arranged behind the first joint surface 3 in sequence.
The inner surface of the cylindrical sealing ring 18 is axially provided with a fourth sealing surface 10, a fifth sealing surface 11 and a sixth sealing surface 12 in sequence, the fifth sealing surface 11 and the sixth sealing surface 12 are sealed with the crest surface of the socket 17 of the sleeved double-wall corrugated pipeline 16, and the fourth sealing surface 10 is close to the end face 1 of the sealing ring head; a sealing convex edge 15 is designed between the fifth sealing surface 11 and the sixth sealing surface 12, and the sealing convex edge 15 is sealed with the crest side surface of a socket 17 of the sleeved double-wall corrugated pipeline 16.
The annular groove 14 is designed between the first fitting surface 3 and the first sealing surface 5, the annular groove 14 is composed of an annular groove outer surface 4 and an annular groove inner surface 13, and the position of the annular groove 14 is just matched with the trough of the spigot 17 of the sleeved double-wall corrugated pipeline 16.
The self-sealing structure is as follows: a sediment flow channel 2 is arranged on a first joint surface 3 on a sealing ring 18, and a circumferential groove 14 is arranged between the first joint surface 3 and a first sealing surface 5; after the double-wall corrugated pipe 16 sleeved with the sealing ring 18 is inserted into the faucet 19 of the other double-wall corrugated pipe 16, sediment in the pipe network flows into and is accumulated in the annular groove outer surface 4 of the sealing ring through the sediment flow channel 2 on the sealing ring 18, the accumulated sediment is elastically deformed by annular extrusion of the annular groove 14 of the sealing ring, the inner surface 13 of the annular groove is promoted to be tightly attached to the trough side wall of the faucet 17 of the double-wall corrugated pipe 16, axial isobaric self-sealing at the position is realized, and the greater the accumulated sediment pressure is, the better the sealing effect is.
The sealing structures at the plurality of positions are as follows: the double-wall corrugated pipeline 16 provided with the sealing ring 18 is inserted into a bell and spigot 19 of another pipeline in a bearing way, the first sealing surface 5, the second sealing surface 6 and the third sealing surface 7 on the sealing ring 18 are respectively tightly adhered to the inner wall surface of the bell and spigot 19, the fourth sealing surface 10, the fifth sealing surface 11 and the sixth sealing surface 12 are tightly adhered to the peak surface of the socket 17, so that multiple radial sealing at the positions is realized, and meanwhile, the sealing convex edge 15 on the sealing ring 18 is tightly adhered to the side surface of the peak of the socket 17 to realize axial sealing; further, the accumulated sediment presses the sealing ring to tightly cling to the wave Gu Cebi of the socket 17 towards the inner surface 13 of the groove, so that the axial isobaric self-sealing of the position is realized.
The first, second, third, fourth, fifth and sixth sealing surfaces on the seal ring 18 are preferably convex ring shaped to provide a better multi-seal after the socket connection.
The silt flow channel 2 on the sealing ring 18 is arranged on the first bonding surface 3 of the sealing ring 18, one end of the silt flow channel 2 is communicated with the end face 1 of the head of the sealing ring, and the other end is communicated with the outer surface 4 of the annular groove on the sealing ring 18.
The head of the further sealing ring is provided with an annular bulge 8, the annular bulge 8 faces the axis of the sealing ring 18, the inner surface 9 of the annular bulge is matched with the peak side surface of the socket 17 of the double-wall corrugated pipeline 16, the axial limiting function is achieved, and the sealing ring 18 is prevented from sliding and disengaging along the socket 17 in the axial direction in the socket mounting process.
The self-sealing principle of the invention is that a plurality of evenly distributed mud sand flow channels 2 are arranged on a first joint surface 3 on a sealing ring 18, after two plastic double-wall corrugated pipelines sleeved with the sealing ring 18 are inserted and installed in place, a first sealing surface 5, a second sealing surface 6 and a third sealing surface 7 on the sealing ring 18 are respectively tightly adhered to the inner wall surface of a bell and spigot 19, a fourth sealing surface 10, a fifth sealing surface 11 and a sixth sealing surface 12 are tightly adhered to the crest surface of a socket 17, so that a plurality of radial seals at the positions are realized, and meanwhile, a sealing convex edge 15 on the sealing ring 18 is tightly adhered to the crest side surface of the socket 17 to realize axial seal; further, a closed sealing ring circumferential groove 14 is formed between the faucet 19 and the rubber sealing ring 18; further, sediment 20 in the pipe network can only flow into and be accumulated in the annular groove outer surface 4 of the sealing ring through the sediment flow channel 2 on the sealing ring 18, as shown by sediment flow direction arrow 21 in the figure, the accumulated sediment 20 is elastically deformed by annular extrusion of the sealing ring towards the annular groove 14, the inner surface 13 of the annular groove is caused to be tightly attached to the trough side wall of the plastic double-wall corrugated pipe socket 17, the axial isobaric self-sealing at the position is realized, and the axial isobaric self-sealing effect is better as the extrusion force of the sediment 20 is larger.
The foregoing is only illustrative of the preferred embodiments of the invention, and it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The pipeline sealing ring with the self-sealing function is characterized by comprising a sealing ring (18), wherein the sealing ring (18) is divided into an outer surface and an inner surface, a first joint surface (3) is arranged on the outer surface of the sealing ring (18) close to an end surface (1), more than 1 circumferential grooves (14) are arranged behind the first joint surface (3), more than 1 outer sealing surface is arranged on the outer surface of the sealing ring (18) behind the circumferential grooves (14), and more than 1 inner sealing surface is arranged on the inner surface of the sealing ring (18); a sediment flow channel (2) is arranged on the first bonding surface (3), one end of the sediment flow channel (2) is communicated with a circumferential groove (14), and the other end is communicated with the end face (1) of the sealing ring; sediment flowing in from a sediment flow channel (2) on a first joint surface (3) of the sealing ring (18) is accumulated in the annular groove (14), and the annular groove (14) is extruded to elastically deform, so that the annular groove (14) is tightly attached to the side wall of the pipeline, and self-sealing connection is realized; the inner surface of the sealing ring (18) is provided with a sealing convex edge (15); the end face (1) of the sealing ring (18) is provided with an annular bulge (8).
2. The sealing ring for pipes with self-sealing function according to claim 1, characterized in that the outer sealing surface is a first sealing surface (5), a second sealing surface (6) or/and a third sealing surface (7).
3. The sealing ring for pipes with self-sealing function according to claim 1, characterized in that the inner sealing surface is a fourth sealing surface (10), a fifth sealing surface (11) or/and a sixth sealing surface (12).
4. The self-sealing gasket of claim 1 wherein said outer and inner sealing surfaces are more than 1 male ring.
5. The sealing method of a sealing ring for a pipeline with a self-sealing function according to any one of claims 1 to 4, wherein the sealing ring (18) is in sealing connection with the installed pipeline through an outer sealing surface and an inner sealing surface, meanwhile, sediment flowing in from a sediment flow channel (2) on a first bonding surface (3) of the sealing ring (18) is accumulated in a circumferential groove (14), and the circumferential groove (14) is pressed to elastically deform, so that the circumferential groove (14) is tightly attached to the side wall of the pipeline, and self-sealing connection is realized.
6. The method of sealing a sealing ring for a conduit having a self-sealing function according to claim 5, wherein the sealing ring (18) is sealingly connected to the mounted conduit by means of an outer sealing surface and an inner sealing surface of 2-4 segments.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111286375 | 2021-11-02 | ||
| CN2021112863755 | 2021-11-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115031064A CN115031064A (en) | 2022-09-09 |
| CN115031064B true CN115031064B (en) | 2024-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210011727.4A Active CN115031064B (en) | 2021-11-02 | 2022-01-06 | Pipeline sealing ring with self-sealing function and sealing method |
Country Status (1)
| Country | Link |
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| CN (1) | CN115031064B (en) |
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| CN110332389A (en) * | 2019-07-03 | 2019-10-15 | 南通云创流体控制科技有限公司 | Spiral bellows joint and assembly method thereof |
| CN110578841A (en) * | 2019-08-30 | 2019-12-17 | 康命源（贵州）科技发展有限公司 | pipe assembly with anti-drop sealing structure |
| CN212131610U (en) * | 2020-04-08 | 2020-12-11 | 安徽省生宸源材料科技实业发展股份有限公司 | Corrugated pipe socket joint connection sealing joint |
| CN216923529U (en) * | 2021-11-02 | 2022-07-08 | 安徽省生宸源材料科技实业发展股份有限公司 | Self sealss pipeline sealing washer structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8474830B2 (en) * | 2007-06-07 | 2013-07-02 | Springseal, Inc. | Gasket |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100226531B1 (en) * | 1996-07-05 | 1999-10-15 | 조용래 | Water-tight connecting structure of systhetic restn spiral corrugated pipe |
| CN2883856Y (en) * | 2006-01-23 | 2007-03-28 | 临海市伟星新型建材有限公司 | Polythane double-wall bellows sealing ring |
| KR100884331B1 (en) * | 2008-07-21 | 2009-02-20 | 일강알앤비(주) | Connection structure of electric wire protection pipe for apartment house |
| CN201635091U (en) * | 2010-04-02 | 2010-11-17 | 张应忠 | Sealing structure of plastic inspection well and spigot of dual-wall corrugated tube |
| CN204267726U (en) * | 2014-12-07 | 2015-04-15 | 莆田市荔城区聚慧科技咨询有限公司 | A kind of seal ring of sheathed casing of underground communication circuit |
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| CN110332389A (en) * | 2019-07-03 | 2019-10-15 | 南通云创流体控制科技有限公司 | Spiral bellows joint and assembly method thereof |
| CN110578841A (en) * | 2019-08-30 | 2019-12-17 | 康命源（贵州）科技发展有限公司 | pipe assembly with anti-drop sealing structure |
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| CN216923529U (en) * | 2021-11-02 | 2022-07-08 | 安徽省生宸源材料科技实业发展股份有限公司 | Self sealss pipeline sealing washer structure |
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| Publication number | Publication date |
|---|---|
| CN115031064A (en) | 2022-09-09 |
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