CN114033898B - Bending automatic reset sampling heat tracing composite pipeline and manufacturing method thereof - Google Patents
Bending automatic reset sampling heat tracing composite pipeline and manufacturing method thereof Download PDFInfo
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- CN114033898B CN114033898B CN202111321892.1A CN202111321892A CN114033898B CN 114033898 B CN114033898 B CN 114033898B CN 202111321892 A CN202111321892 A CN 202111321892A CN 114033898 B CN114033898 B CN 114033898B
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- bending
- spacer
- heat tracing
- manufacturing
- composite pipeline
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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
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
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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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
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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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a bending automatic resetting sampling heat tracing composite pipeline and a manufacturing method thereof, in particular to the field of sampling tools, and the sampling heat tracing composite pipeline comprises an outer sheath, double-sided aluminum foils, glass fibers, a nano fireproof layer and a PTFE pipe, wherein the outer sheath, the double-sided aluminum foils, the glass fibers and the nano fireproof layer are sequentially sleeved outside the PTFE pipe, the surface of the outer sheath is provided with a bending prevention mechanism, and the bending prevention mechanisms are fixedly connected with each other, so that the sampling heat tracing composite pipeline has the advantages that: according to the invention, the anti-bending mechanism is arranged, the spacers in the anti-bending mechanism are fixedly connected through the memory metal strips, so that the memory metal strips can automatically return to the original positions after being unstressed in the bending process of the spacers, the bent positions are automatically reset, and the anti-bending grooves and the spiral supporting pieces are arranged on the surfaces of the spacers, so that the bending resistance of the spacers can be greatly enhanced, and the sampling heat tracing composite pipeline is prevented from being easily bent.
Description
Technical Field
The invention relates to the field of sampling tools, in particular to a sampling heat tracing composite pipeline capable of automatically resetting in bending and a manufacturing method thereof.
Background
The sampling heat tracing composite pipeline is mainly used for sampling gas (liquid) by a monitoring control system, and the gas is conveyed from a sampling position (such as a chimney, an engine and a joint of a heat tracing sampling probe) to an analysis measuring instrument (a mass spectrometer, a gas chromatograph and the like), so that the gas is widely applied to industries of petroleum, chemical industry, electric power, metallurgy, coking, environmental protection and the like.
In the prior art, most of traditional sampling heat tracing composite pipelines have no memory function, namely, the original position cannot be recovered after being re-bent, and the traditional sampling heat tracing composite pipelines are easy to bend and easily cause damage to internal elements, so the invention provides the sampling heat tracing composite pipeline with the automatic bending reset function and the manufacturing method thereof.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a sampling heat tracing composite pipeline capable of automatically resetting in bending and a manufacturing method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a sample companion heat composite line that crooked automatic re-setting and manufacturing method thereof, includes oversheath, two-sided aluminium foil, glass fiber, nanometer flame retardant coating and PTFE pipe, sheath, two-sided aluminium foil, glass fiber, nanometer flame retardant coating overlap in proper order and establish the outside at the PTFE pipe, the surface of oversheath is provided with anti-bending mechanism, fixed connection between the anti-bending mechanism, be provided with the filling layer between oversheath and the glass fiber, the filling layer sets up the surface at two-sided aluminium foil, anti-bending mechanism includes the spacer, the spacer is four, distance between the spacer all equals, all movable the inserting has memory metal strip on the spacer, through a sealing member fixed connection between memory metal strip's both ends and the spacer, the spacer surface between the sealing member all is provided with anti-bending groove, be provided with spiral support in the anti-bending groove, the outside of spiral support is provided with No. two sealing members cover at anti-bending groove's surface and with spacer surface parallel and level.
Preferably, the specific manufacturing steps are as follows:
s1, assembling a sampling heat tracing composite pipeline;
s2, manufacturing a bending prevention mechanism part;
s3, installing an anti-bending mechanism;
s4, producing and installing a filling layer;
s5, bending detection.
Preferably, the step S1 specifically includes: the outer sheath, the double-sided aluminum foil, the glass fiber and the nanometer fireproof layer are sleeved and assembled outside the PTFE pipe.
Preferably, the step S2 specifically includes: the method comprises the steps of manufacturing a corresponding number of spacers according to the size of an outer sheath, wherein the spacers are in a circular shape, the spacers are in a group of four, the inner diameter size of each spacer is larger than the outer diameter size of the outer sheath, the part between the inner diameter and the outer diameter of each spacer is sequentially penetrated with preassembled holes for forming memory metal strips, the inner diameter layer of each spacer is provided with a filling layer of epoxy resin glue, the surface of each spacer is sequentially provided with concave anti-bending grooves, and corresponding spiral supporting pieces are manufactured according to the section length and the thickness of each anti-bending groove and are spiral compression springs.
Preferably, the step S3 specifically includes:
s3.1, sleeving the spacer on the outer sheath according to equal intervals in sequence, then extruding and filling the epoxy resin glue into a filling layer with the epoxy resin glue on an inner diameter layer of the spacer, and fixedly connecting the spacer and the outer sheath through the epoxy resin glue;
s3.2, sequentially inserting the memory metal strips into the preassembling holes, cutting off the ends arranged outside the spacer after the insertion is completed, and sealing the spacer and the memory metal strips through a first sealing element, wherein the first sealing element is sealant;
s3.3, placing the spiral supporting piece into the anti-bending groove, sealing the spiral supporting piece through a second sealing piece, wherein the second sealing piece is composed of a strip-shaped rubber pad and sealing glue, the strip-shaped rubber pad is arranged in the anti-bending groove, and then the fixing of the spiral supporting piece is completed through the sealing glue and the inner wall fixed connection of the anti-bending groove.
Preferably, the step S4 specifically includes: the material of the filling layer is natural latex, the natural latex is manufactured into a semi-annular shape according to the outer diameter size of the double-sided aluminum foil, the thickness of the natural latex is smaller than the distance between the outer sheath and the glass fiber, and when the filling layer is installed, the semi-annular natural latex is sequentially fixed outside the double-sided aluminum foil through sealant, so that the filling material is installed.
Preferably, the step S5 specifically includes: the test can enable the force applied when the outer sheath is bent and the time from different bending degrees to the recovery of the outer sheath, so that the bending recovery and the bending resistance degree of the device can be judged.
The beneficial effects of the invention are as follows:
according to the invention, the anti-bending mechanism is arranged, the spacers in the anti-bending mechanism are fixedly connected through the memory metal strips, so that the memory metal strips can automatically return to the original positions after being unstressed in the bending process of the spacers, the bending positions are automatically reset, and the anti-bending grooves and the spiral supporting pieces are arranged on the surfaces of the spacers, so that the bending resistance of the spacers can be greatly enhanced, the sampling heat tracing composite pipeline is prevented from being easily bent, and the filling layer is arranged between the outer sheath and the glass fiber, so that the abrasion of double-sided aluminum foils caused by bending between the outer sheath and the glass fiber can be avoided, and the service life of the double-sided aluminum foils is further influenced.
Drawings
FIG. 1 is a front view of the present invention;
figure 2 is a cross-sectional view of a spacer of the present invention.
Legend description:
1. an outer sheath; 2. double-sided aluminum foil; 3. glass fibers; 4. a nano fireproof layer; 5. a PTFE tube; 6. a bending prevention mechanism; 7. a filling layer;
61. a spacer bush; 62. a memory metal strip; 63. a first seal; 64. an anti-bending groove; 65. a screw-type support; 66. and a second sealing element.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1-2, a sampling heat tracing composite pipeline capable of automatically resetting after bending and a manufacturing method thereof are provided, the sampling heat tracing composite pipeline comprises an outer sheath 1, double-sided aluminum foils 2, glass fibers 3, a nano fireproof layer 4 and a PTFE pipe 5, wherein the outer sheath, the double-sided aluminum foils 2, the glass fibers 3 and the nano fireproof layer 4 are sequentially sleeved outside the PTFE pipe 5, a bending prevention mechanism 6 is arranged on the surface of the outer sheath 1, fixed connection is performed between the bending prevention mechanism 6, a filling layer 7 is arranged between the outer sheath 1 and the glass fibers 3, the filling layer 7 is arranged on the surface of the double-sided aluminum foils 2, the bending prevention mechanism 6 comprises a spacer 61, the spacer 61 is in a group of four, the distances between the spacer 61 are equal, memory metal strips 62 are movably inserted on the spacer 61, two ends of the memory metal strips 62 are fixedly connected with the spacer 61 through a first sealing piece 63, a second sealing piece 66 is arranged on the surface of the spacer 61 between the first sealing piece 63, the second sealing piece 66 is covered on the surface of the first sealing piece 64, and the second sealing piece 66 is flush with the surface of the first sealing piece 64.
The specific manufacturing steps are as follows:
s1, assembling a sampling heat tracing composite pipeline;
s2, manufacturing a part of the bending prevention mechanism 6;
s3, installing an anti-bending mechanism 6;
s4, producing and installing a filling layer 7;
s5, bending detection.
The step S1 specifically includes: the outer sheath 1, the double-sided aluminum foil 2, the glass fiber 3 and the nanometer fireproof layer 4 are sleeved and assembled outside the PTFE tube 5.
The step S2 specifically includes: the method comprises the steps of manufacturing a corresponding number of spacers 61 according to the size of an outer sheath 1, wherein the spacers 61 are in a ring shape, the spacers 61 are in a group of four, the inner diameter size of each spacer 61 is larger than the outer diameter size of the outer sheath 1, the parts between the inner diameter and the outer diameter of each spacer 61 are sequentially penetrated with preassembled holes provided with memory metal strips 62, the inner diameter layer of each spacer 61 is provided with an epoxy resin glue filling layer 7, the surfaces of the spacers 61 are sequentially provided with concave anti-bending grooves 64, corresponding spiral supporting pieces 65 are manufactured according to the section length and the thickness of each anti-bending groove 64, and the spiral supporting pieces 65 are spiral compression springs.
The step S3 specifically includes:
s3.1, sleeving the spacer 61 on the outer sheath 1 in sequence at equal intervals, then extruding and filling epoxy resin glue into a filling layer 7 with the epoxy resin glue on the inner diameter layer of the spacer 61, and fixedly connecting the spacer 61 with the outer sheath 1 through the epoxy resin glue;
s3.2, sequentially inserting the memory metal strips 62 into the preassembly holes, cutting off the ends arranged outside the spacer 61 after the insertion is completed, and then sealing the spacer 61 and the memory metal strips 62 through a first sealing element 63, wherein the first sealing element 63 is sealant;
s3.3, placing the spiral supporting piece 65 into the anti-bending groove 64, sealing the spiral supporting piece through a second sealing piece 66, wherein the second sealing piece 66 is composed of a strip-shaped rubber pad and sealing glue, the strip-shaped rubber pad is arranged in the anti-bending groove 64, and then the strip-shaped rubber pad is fixedly connected with the inner wall of the anti-bending groove 64 through the sealing glue, so that the fixing of the spiral supporting piece 65 is completed.
The step S4 specifically includes: the material of the filling layer 7 is natural latex, the natural latex is manufactured into a semi-annular shape according to the outer diameter size of the double-sided aluminum foil 2, the thickness is smaller than the distance between the outer sheath 1 and the glass fiber 3, and when the filling layer is installed, the semi-annular natural latex is sequentially fixed outside the double-sided aluminum foil 2 through sealant, so that the installation of the filling material is completed.
The step S5 specifically includes: the test enables the force applied when bending the outer sheath 1, and the time to test the different bending degrees to the return to the original position, to judge the bending recovery and the bending resistance degree of the device.
Comparative example 1
This example is substantially the same as example 1 provided, with the main differences: step S2, no memory metal strip is arranged;
comparative example 2
This example is substantially the same as example 1 provided, with the main differences: in step S3, no screw support is installed.
Comparative example 3
This example is substantially the same as example 1 provided, with the main differences: in step S4, no filler layer is provided.
Performance testing
The bending resistance and recovery performance of the sample heat tracing composite pipeline with the bending automatic reset provided in the example 1 and the comparative examples 1 to 3 are respectively equal in amount:
| resistance to bending | Recovery performance | |
| Example 1 | 99.9% | 99.9% |
| Comparative example 1 | 90% | 70% |
| Comparative example 2 | 72% | 92% |
| Comparative example 3 | 91% | 89% |
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The utility model provides a sample companion heat composite line that crooked automatic re-setting, its characterized in that includes oversheath (1), double-sided aluminium foil (2), glass fiber (3), nanometer flame retardant coating (4) and PTFE pipe (5), oversheath (1), double-sided aluminium foil (2), glass fiber (3), nanometer flame retardant coating (4) are overlapped in proper order and are established in the outside of PTFE pipe (5), the surface of oversheath (1) is provided with bending prevention mechanism (6), fixed connection between bending prevention mechanism (6), be provided with filling layer (7) between oversheath (1) and glass fiber (3), filling layer (7) set up on the surface of double-sided aluminium foil (2), bending prevention mechanism (6) are including spacer (61), spacer (61) are four, distance between spacer (61) all equals, all activity is inserted on spacer (61) and is equipped with memory metal strip (62), through first seal (63) between both ends and spacer (61), be provided with seal (64) between first seal (63) and second seal (64) support screw (64) support groove, support screw (64) are provided with between two seal (64), and the second sealing piece (66) is covered on the surface of the anti-bending groove (64) and is flush with the surface of the spacer bush (61).
2. The method for manufacturing the sampling heat tracing composite pipeline with the automatic bending resetting function according to claim 1, wherein the specific manufacturing steps are as follows:
s1, assembling a sampling heat tracing composite pipeline;
s2, manufacturing a part of the bending prevention mechanism (6);
s3, installing an anti-bending mechanism (6);
s4, producing and installing a filling layer (7);
s5, bending detection.
3. The method for manufacturing the bending automatic-resetting sampling heat tracing composite pipeline according to claim 2, wherein the step S1 is specifically: the outer sheath (1), the double-sided aluminum foil (2), the glass fiber (3) and the nanometer fireproof layer (4) are sleeved and assembled outside the PTFE tube (5).
4. The method for manufacturing the bending automatic-resetting sampling heat tracing composite pipeline according to claim 2, wherein the step S2 is specifically: according to the size preparation of oversheath (1) corresponds quantity spacer (61), spacer (61) are the ring form, spacer (61) are four and are organized, the internal diameter size of spacer (61) is greater than the external diameter size of oversheath (1), the pre-installation hole of seting up memory metal strip (62) is run through in proper order on the part between the internal diameter external diameter of spacer (61), set up filling layer (7) of epoxy glue on the internal diameter layer of spacer (61), set up anti-bending groove (64) of sunken into in proper order on spacer (61) surface to according to the cross-section length and the thickness preparation of anti-bending groove (64) corresponding screw support piece (65), screw support piece (65) are spiral compression spring.
5. The method for manufacturing the bending automatic-resetting sampling heat tracing composite pipeline according to claim 2, wherein the step S3 is specifically:
s3.1, sleeving the spacer bush (61) on the outer sheath (1) at equal intervals in sequence, then extruding and filling epoxy resin glue into a filling layer (7) with the epoxy resin glue on an inner diameter layer of the spacer bush (61), and fixedly connecting the spacer bush (61) with the outer sheath (1) through the epoxy resin glue;
s3.2, sequentially inserting the memory metal strips (62) into the preassembly holes, cutting off the ends arranged outside the spacer bush (61) after the insertion is completed, and sealing the spacer bush (61) and the memory metal strips (62) through a first sealing element (63), wherein the first sealing element (63) is sealant;
s3.3, placing the spiral supporting piece (65) into the anti-bending groove (64) and sealing the spiral supporting piece through a second sealing piece (66), wherein the second sealing piece (66) is composed of a strip-shaped rubber pad and sealing glue, the strip-shaped rubber pad is arranged in the anti-bending groove (64), and then the spiral supporting piece (65) is fixed through the sealing glue and the inner wall of the anti-bending groove (64).
6. The method for manufacturing the bending automatic-resetting sampling heat tracing composite pipeline according to claim 2, wherein the step S4 is specifically: the material of the filling layer (7) is natural latex, the natural latex is manufactured into a semi-annular shape according to the outer diameter size of the double-sided aluminum foil (2), the thickness of the natural latex is smaller than the distance between the outer sheath (1) and the glass fiber (3), and when the filling layer is installed, the semi-annular natural latex is sequentially fixed outside the double-sided aluminum foil (2) through sealant, so that the installation of the filling material is completed.
7. The method for manufacturing the bending automatic-resetting sampling heat tracing composite pipeline according to claim 2, wherein the step S5 is specifically: the test enables the force applied when the outer sheath (1) is bent, and the time to return to the original position to test different bending degrees, so as to judge the bending recovery and bending resistance degree of the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321892.1A CN114033898B (en) | 2021-11-09 | 2021-11-09 | Bending automatic reset sampling heat tracing composite pipeline and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321892.1A CN114033898B (en) | 2021-11-09 | 2021-11-09 | Bending automatic reset sampling heat tracing composite pipeline and manufacturing method thereof |
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| CN114033898A CN114033898A (en) | 2022-02-11 |
| CN114033898B true CN114033898B (en) | 2023-08-08 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE9203873D0 (en) * | 1992-12-22 | 1992-12-22 | Asea Atom Ab | ROERBROTTSFOERANKRING |
| JPH06137468A (en) * | 1992-10-27 | 1994-05-17 | Sekisui Chem Co Ltd | Piping member and method for bending same |
| JPH0791593A (en) * | 1993-09-22 | 1995-04-04 | Furukawa Electric Co Ltd:The | Non-combustible coated conduit |
| NO20043980D0 (en) * | 2004-09-23 | 2004-09-23 | Marine Subsea Group As | stiffeners |
| CN208281645U (en) * | 2017-12-31 | 2018-12-25 | 内蒙古建筑职业技术学院 | A kind of novel municipal works drainage pipeline |
| CN208778884U (en) * | 2018-08-14 | 2019-04-23 | 河北广信塑料制品有限公司 | A kind of plastic tube of reinforcement structure |
| CN209654836U (en) * | 2019-02-03 | 2019-11-19 | 上海欧展电器有限公司 | A kind of flue gas sampling heat traced pipeline structure |
| CN209671777U (en) * | 2018-11-27 | 2019-11-22 | 湖北永晟塑料管业有限责任公司 | A kind of high tenacity PE plastic film capicitor |
| CN212480387U (en) * | 2020-03-12 | 2021-02-05 | 龙里县粤盛型材有限公司 | Bending-resistant PVC (polyvinyl chloride) pipe |
| CN214535135U (en) * | 2021-01-26 | 2021-10-29 | 上海浦东混凝土制品有限公司 | Long-life concrete drain pipe |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050274425A1 (en) * | 2004-06-03 | 2005-12-15 | Itt Manufacturing Enterprises, Inc. | Flexiform tubing |
| US8176943B2 (en) * | 2008-11-21 | 2012-05-15 | Parker-Hannifin Corporation | High temperature fire sleeve |
| RU2535800C2 (en) * | 2009-04-16 | 2014-12-20 | ШЕВРОН Ю. Эс. Эй. ИНК. | Structural components used for oil and gas prospecting and oil processing and for petroleum chemistry |
-
2021
- 2021-11-09 CN CN202111321892.1A patent/CN114033898B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06137468A (en) * | 1992-10-27 | 1994-05-17 | Sekisui Chem Co Ltd | Piping member and method for bending same |
| SE9203873D0 (en) * | 1992-12-22 | 1992-12-22 | Asea Atom Ab | ROERBROTTSFOERANKRING |
| JPH0791593A (en) * | 1993-09-22 | 1995-04-04 | Furukawa Electric Co Ltd:The | Non-combustible coated conduit |
| NO20043980D0 (en) * | 2004-09-23 | 2004-09-23 | Marine Subsea Group As | stiffeners |
| CN208281645U (en) * | 2017-12-31 | 2018-12-25 | 内蒙古建筑职业技术学院 | A kind of novel municipal works drainage pipeline |
| CN208778884U (en) * | 2018-08-14 | 2019-04-23 | 河北广信塑料制品有限公司 | A kind of plastic tube of reinforcement structure |
| CN209671777U (en) * | 2018-11-27 | 2019-11-22 | 湖北永晟塑料管业有限责任公司 | A kind of high tenacity PE plastic film capicitor |
| CN209654836U (en) * | 2019-02-03 | 2019-11-19 | 上海欧展电器有限公司 | A kind of flue gas sampling heat traced pipeline structure |
| CN212480387U (en) * | 2020-03-12 | 2021-02-05 | 龙里县粤盛型材有限公司 | Bending-resistant PVC (polyvinyl chloride) pipe |
| CN214535135U (en) * | 2021-01-26 | 2021-10-29 | 上海浦东混凝土制品有限公司 | Long-life concrete drain pipe |
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| CN114033898A (en) | 2022-02-11 |
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