CN114321514A - Lining pipe of ultra-temperature high-molecular polyethylene - Google Patents
Lining pipe of ultra-temperature high-molecular polyethylene Download PDFInfo
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- CN114321514A CN114321514A CN202111581692.XA CN202111581692A CN114321514A CN 114321514 A CN114321514 A CN 114321514A CN 202111581692 A CN202111581692 A CN 202111581692A CN 114321514 A CN114321514 A CN 114321514A
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Abstract
The invention discloses an ultrahigh-temperature high-molecular polyethylene lining pipe which comprises an outer pipeline, wherein a lining pipeline is spliced on the inner side of the outer pipeline; preferably, the lining pipe comprises from outside to inside: the composite pipe comprises a rubber pipe layer, a glass fiber pipe layer, a PE pipe layer and a polyethylene pipe layer, wherein the inner side of the polyethylene pipe layer is coated with a silicon carbide coating; as optimization, a supporting mechanism for preventing the lining pipeline from being heated, softened and deformed is arranged inside the rubber pipe layer; preferably, a fixing mechanism for increasing the connection strength between the lining pipeline and the outer pipeline is arranged on the inner side of the lining pipeline. This bushing pipe in ultrahigh temperature polymer polyethylene through the inside lining pipeline that uses the combined type, and the rubber tube layer has increased the joint strength of inside lining pipeline and outer pipeline, and glass fiber tube layer and PE pipe layer have improved inside lining pipeline toughness and high temperature resistance, and the carborundum coating has improved the corrosion-resistant and wearability of inside lining pipeline, so makes the comprehensive improvement of performance of inside lining pipeline, reinforcing product quality.
Description
Technical Field
The invention relates to the technical field of polyethylene lining pipes, in particular to an ultrahigh-temperature high-molecular polyethylene lining pipe.
Background
The lining pipe is a conveying pipeline with an external steel or hard structure as a pipeline framework and an anticorrosive and high-temperature-resistant flexible material as a lining layer, and through self physical and chemical properties, the effects of a pipeline conveying medium on the external structure, such as impact force, corrosion and the like, are reduced, the service life of the pipeline is greatly prolonged, and the cost of a user is reduced.
The polyethylene has good wear resistance and corrosion resistance, and is a high-quality material for manufacturing the lining pipe;
when the existing polyethylene lining pipeline is used for conveying petroleum, the following problems are caused:
1. the salt and sulfide in the petroleum have strong corrosion resistance, and the pure polyethylene material cannot resist the corrosion;
2. the oil temperature is higher in the deep underground, and the high temperature can cause the softening and shrinkage of the lining pipeline to influence the flow;
3. the pressure of the oil led out underground is large, and the dislocation of the inner lining and the outer pipe can be caused under the strong impact;
therefore, we propose an ultra-high temperature high molecular polyethylene lining pipe to solve the problem.
Disclosure of Invention
In order to overcome the problems of corrosion, softening shrinkage, impact dislocation and the like, the invention aims to provide the ultrahigh-temperature high-molecular polyethylene lining pipe which has the effects of corrosion resistance, small deformation and firm fixation.
The invention adopts the following technical scheme for realizing the technical purpose: the ultrahigh-temperature high-molecular polyethylene lining pipe comprises an outer pipeline, wherein a lining pipeline is inserted into the inner side of the outer pipeline;
preferably, the lining pipe comprises from outside to inside: the composite pipe comprises a rubber pipe layer, a glass fiber pipe layer, a PE pipe layer and a polyethylene pipe layer, wherein the inner side of the polyethylene pipe layer is coated with a silicon carbide coating;
as optimization, a supporting mechanism for preventing the lining pipeline from being heated, softened and deformed is arranged inside the rubber pipe layer;
preferably, a fixing mechanism for increasing the connection strength between the lining pipeline and the outer pipeline is arranged on the inner side of the lining pipeline.
And optimally, glass crystal is mixed into the PE tube layer, and the PE tube layer and the polyethylene tube layer are subjected to heat treatment.
Preferably, the supporting mechanism is wrapped in a supporting inner cavity formed in the rubber pipe layer, and the supporting inner cavity is fixedly connected with the supporting frame.
As optimization, the support inner cavities are distributed at intervals, and the interval distance is inversely proportional to the hot melt ratio of the lining pipeline;
the hot melting ratio is the change ratio of temperature rise and bending degree of a one-meter-long lining pipeline with two fixed ends;
as optimization, the supporting inner cavities are communicated with each other;
preferably, a closed cavity is formed in the support frame.
The supporting inner cavity and the supporting frame are filled with gas with thermal expansion coefficient larger than that of air.
As optimization, the support frame is made through the buckled plate that encircles, and the upper and lower surface of buckled plate and the upper and lower inner wall fixed connection who supports the inner chamber.
Preferably, the support frame is made of a group of mutually surrounding corrugated pipes, and the upper and lower surfaces of the corrugated pipes are fixedly connected with the upper and lower inner walls of the support inner cavity.
Preferably, the fixing mechanisms are distributed in intervals of the supporting inner cavity, and the number of the intervals is 3-10.
As optimization, fixed establishment includes the embedded cushion in the polyethylene pipe layer inboard, the fixed surface of cushion is connected with the impact plate, fixedly connected with backup pad between the side of impact plate and the polyethylene pipe layer, the pressure tank has been seted up in the outside on rubber tube layer.
As optimization, the position of the cushion and the pressure groove on the inner liner pipeline correspond;
preferably, the force required by deformation of the cushion is greater than the force required by deformation of the polyethylene pipe layer, and the impact plate is inclined towards the flowing direction of the lining pipeline.
Preferably, the cushion is located at the center of the pressure tank on a vertical plane, and the connecting point of the support plate and the lining pipe extends out of the pressure tank on the vertical plane.
Preferably, the connecting point of the supporting plate and the impact plate is positioned between the central point of the impact plate and the lining pipeline.
The invention has the following beneficial effects:
1. this bushing pipe in ultrahigh temperature polymer polyethylene through the inside lining pipeline that uses the combined type, and the rubber tube layer has increased the joint strength of inside lining pipeline and outer pipeline, and glass fiber tube layer and PE pipe layer have improved inside lining pipeline toughness and high temperature resistance, and the carborundum coating has improved the corrosion-resistant and wearability of inside lining pipeline, so makes the comprehensive improvement of performance of inside lining pipeline, reinforcing product quality.
2. According to the ultrahigh-temperature high-molecular polyethylene lining pipe, the supporting inner cavity is formed in the lining pipeline, so that when the lining pipeline is installed, the lining pipeline can be more conveniently plugged into the outer pipeline due to the fact that the outer diameter of the lining pipeline is smaller than the inner diameter of the outer pipeline;
during work, because the petroleum led out from the deep part of the ground bottom has certain temperature, the supporting inner cavity and the supporting frame are expanded to support, so that the outer pipeline and the lining pipeline are in close contact;
along with the depth of the pipeline, the temperature of the underground petroleum is continuously increased, the lining pipeline begins to be softened, but the supporting effect of the supporting inner cavity and the supporting frame is stronger and stronger, so that the lining pipeline can be prevented from softening and shrinking to influence the flow rate;
when the lining pipeline needs to be replaced, the supporting inner cavity and the supporting frame are broken only at the pipe orifice of the outer pipeline, internal air is discharged, and the lining pipeline can be easily drawn out after the support is lost.
3. This bushing pipe in ultrahigh temperature polymer polyethylene makes the support frame through the buckled plate, and transverse span is bigger, and the support range of single strong point is wider, and the cost is also low.
4. This bushing pipe in ultrahigh temperature polymer polyethylene makes the support frame through a set of bellows that encircles each other, makes its support intensity higher, and the deformation force that can oppose is bigger.
5. The ultra-high temperature high molecular polyethylene lining pipe supports the inner cavity by interval distribution, and the interval distance is inversely proportional to the hot melting ratio of the lining pipe; therefore, the lining pipeline is easier to deform, and the supporting points are more, so that the supporting effect is better;
6. this bushing pipe in ultrahigh temperature polymer polyethylene, through set up strikeing board and backup pad in the inside lining pipeline, it is outdated when oil flows in from inside lining pipeline, the strikeing board receives right thrust, because the fulcrum of backup pad on the strikeing board is located between strikeing board central point and the inside lining pipeline, consequently, the strikeing board uses the backup pad as the fulcrum, one side of keeping away from inside lining pipeline deflects right, one side that is close to inside lining pipeline inwards elongates, it is sunken to correspond the pressure tank that is located the inside lining pipeline outside with it, the inner space grow, form the negative pressure, adsorb on outer pipeline, make it connect inseparabler, prevent that the impact force of oil from leading to inside lining pipeline dislocation.
Drawings
FIG. 1 is a front cross-sectional view of the structure of the present invention.
FIG. 2 is a side cross-sectional view of the inventive structure.
FIG. 3 is an enlarged view of the point A in the structure of FIG. 2.
FIG. 4 is a diagram of a structural support mechanism according to the present invention.
In the figure: 1. an outer conduit; 2. lining a pipeline; 21. a rubber tube layer; 22. a glass fiber tube layer; 23. a PE tube layer; 24. a polyethylene pipe layer; 25. a silicon carbide coating; 3. a support mechanism; 31. supporting the inner cavity; 32. a support frame; 4. a fixing mechanism; 41. a soft cushion; 42. an impact plate; 43. a support plate; 44. and a pressure tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-4, an ultra-high temperature high molecular polyethylene lining pipe comprises an outer pipe 1, and a lining pipe 2 is inserted into the inner side of the outer pipe 1;
the lining pipe 2 comprises, from the outside to the inside: the composite pipe comprises a rubber pipe layer 21, a glass fiber pipe layer 22, a PE pipe layer 23 and a polyethylene pipe layer 24, wherein the inner side of the polyethylene pipe layer 24 is coated with a silicon carbide coating 25;
the PE tube layer 23 and the polyethylene tube layer 24 are subjected to heat treatment, so that internal stress can be improved;
the PE tube layer 23 is mixed with glass crystal, so that the toughness of the PE tube layer 23 can be improved.
Through the inside lining pipeline 2 that uses the combined type, the rubber tube layer 21 has increased inside lining pipeline 2 and outer pipeline 1's joint strength, and glass fiber tube layer 22 and PE pipe layer 23 have improved inside lining pipeline 2 toughness and high temperature resistance, and carborundum coating 25 has improved inside lining pipeline 2's corrosion-resistant and wearability, so makes inside lining pipeline 2's performance improve comprehensively, reinforcing product quality.
Example 2
Referring to fig. 1-4, an ultra-high temperature high molecular polyethylene lining pipe comprises an outer pipe 1, and a lining pipe 2 is inserted into the inner side of the outer pipe 1;
the lining pipe 2 comprises, from the outside to the inside: the composite pipe comprises a rubber pipe layer 21, a glass fiber pipe layer 22, a PE pipe layer 23 and a polyethylene pipe layer 24, wherein the inner side of the polyethylene pipe layer 24 is coated with a silicon carbide coating 25;
the supporting mechanism 3 is wrapped by a supporting inner cavity 31 arranged in the rubber tube layer 21, and a supporting frame 32 is fixedly connected in the supporting inner cavity 31.
The supporting inner cavities 31 are distributed at intervals, and the interval distance is inversely proportional to the hot melt ratio of the lining pipeline 2;
the hot melt ratio is the change ratio of temperature rise and bending degree of a one-meter-long lining pipeline 2 with two fixed ends;
therefore, the lining pipeline 2 is easier to deform, and the supporting points are more, so that the supporting effect is better;
the supporting inner cavities 31 are communicated with each other, the supporting frames 32 are communicated with each other, and the difference between the outer diameter of the lining pipeline 2 and the inner diameter of the outer pipeline 1 is 2-5 mm;
the support frame 32 has a closed cavity therein.
The supporting inner cavity 31 and the supporting frame 32 are filled with gas with thermal expansion coefficient larger than air, and the gas can be carbon dioxide, so that the supporting inner cavity is firmer and has better supporting effect after being heated and expanded.
By arranging the supporting inner cavity 31 in the lining pipeline 2, when the lining pipeline 2 is installed, the lining pipeline 2 can be more conveniently plugged into the outer pipeline 1 because the outer diameter of the lining pipeline 2 is smaller than the inner diameter of the outer pipeline 1;
in operation, because the petroleum led out from the deep underground has a certain temperature, the temperature in the lining pipeline 2 rises, the gas in the supporting inner cavity 31 is subjected to thermal expansion to form a supporting ring to be propped against the outer pipeline 1, meanwhile, the supporting frame 32 in the supporting inner cavity 31 is also expanded to assist in supporting the inner cavity 31, and thus, the outer pipeline 1 and the lining pipeline 2 are tightly contacted;
along with the depth of the pipeline, the temperature of the ground bottom oil is continuously increased, the lining pipeline 2 starts to be softened, but the supporting effect of the supporting inner cavity 31 and the supporting frame 32 is stronger and stronger, so that the lining pipeline 2 can be prevented from softening and shrinking to influence the flow rate;
when the lining pipeline 2 needs to be replaced, the supporting inner cavity 31 and the supporting frame 32 are broken only at the position of the opening of the outer pipeline 1, the internal air is discharged, and the lining pipeline 2 can be easily drawn out after the support is lost.
The support frame 32 is made of a surrounding corrugated plate, and upper and lower surfaces of the corrugated plate are fixedly connected with upper and lower inner walls of the support cavity 31.
The support frame 32 is made of the corrugated plate, the transverse span is larger, the support range of a single support point is wider, and the cost is low.
Example 3
Referring to fig. 1-4, an ultra-high temperature high molecular polyethylene lining pipe comprises an outer pipe 1, and a lining pipe 2 is inserted into the inner side of the outer pipe 1;
the lining pipe 2 comprises, from the outside to the inside: the composite pipe comprises a rubber pipe layer 21, a glass fiber pipe layer 22, a PE pipe layer 23 and a polyethylene pipe layer 24, wherein the inner side of the polyethylene pipe layer 24 is coated with a silicon carbide coating 25;
the supporting mechanism 3 is wrapped by a supporting inner cavity 31 arranged in the rubber tube layer 21, and a supporting frame 32 is fixedly connected in the supporting inner cavity 31.
The supporting inner cavities 31 are distributed at intervals, and the interval distance is inversely proportional to the hot melt ratio of the lining pipeline 2;
the hot melt ratio is the change ratio of temperature rise and bending degree of a one-meter-long lining pipeline 2 with two fixed ends;
therefore, the lining pipeline 2 is easier to deform, and the supporting points are more, so that the supporting effect is better;
the supporting inner cavities 31 are communicated with each other, the supporting frames 32 are communicated with each other, and the difference between the outer diameter of the lining pipeline 2 and the inner diameter of the outer pipeline 1 is 2-5 mm;
the support frame 32 has a closed cavity therein.
The supporting inner cavity 31 and the supporting frame 32 are filled with gas with thermal expansion coefficient larger than air, and the gas can be carbon dioxide, so that the supporting inner cavity is firmer and has better supporting effect after being heated and expanded.
The support frame 32 is made of a set of mutually surrounding corrugated pipes, and the upper and lower surfaces of the corrugated pipes are fixedly connected with the upper and lower inner walls of the support cavity 31.
The support frame 32 is made of a group of mutually surrounding corrugated pipes, so that the support strength is higher, and the deformation force capable of resisting is larger.
Example 4
Referring to fig. 1-4, an ultra-high temperature high molecular polyethylene lining pipe comprises an outer pipe 1, and a lining pipe 2 is inserted into the inner side of the outer pipe 1;
the lining pipe 2 comprises, from the outside to the inside: the composite pipe comprises a rubber pipe layer 21, a glass fiber pipe layer 22, a PE pipe layer 23 and a polyethylene pipe layer 24, wherein the inner side of the polyethylene pipe layer 24 is coated with a silicon carbide coating 25;
the fixing mechanisms 4 are distributed in the intervals of the supporting inner cavities 31, and the number of the intervals is 3-10;
the fixing mechanism 4 comprises a cushion 41 embedded inside the polyethylene pipe layer 24, an impact plate 42 is fixedly connected to the surface of the cushion 41, a supporting plate 43 is fixedly connected between the side surface of the impact plate 42 and the polyethylene pipe layer 24, and a pressure groove 44 is formed in the outer side of the rubber pipe layer 21.
The positions of the cushion 41 and the pressure groove 44 correspond to each other on the lining pipeline 2;
the force required by the deformation of the cushion 41 is larger than the force required by the deformation of the polyethylene pipe layer 24, when the impact plate 42 is stressed, the cushion 41 can be pulled to deform, the deflection occurs relative to the lining pipeline 2, and the impact plate 42 inclines towards the circulation direction of the lining pipeline 2.
The cushion 41 is located at the center of the pressure tank 44 on the vertical plane, and the connection point of the support plate 43 to the lining pipe 2 extends outside the pressure tank 44 on the vertical plane.
The attachment point of the support plate 43 to the impingement plate 42 is located between the center point of the impingement plate 42 and the liner conduit 2.
Through set up impingement plate 42 and backup pad 43 in inside lining pipeline 2, it is through when oil flows in from inside lining pipeline 2, impingement plate 42 receives thrust rightward, because the fulcrum of backup pad 43 on impingement plate 42 is located between impingement plate 42 central point and inside lining pipeline 2, consequently, impingement plate 42 uses backup pad 43 as the fulcrum, the one side of keeping away from inside lining pipeline 2 deflects right, one side that is close to inside lining pipeline 2 inwards elongates, it is sunken to correspond the pressure groove 44 that is located the inside lining pipeline 2 outside with it, the inner space grow, form the negative pressure, adsorb on outer pipeline 1, it is inseparabler to make its connection, prevent that the impact force of oil from resulting in inside lining pipeline dislocation.
Example 5
Referring to fig. 1-4, an ultra-high temperature high molecular polyethylene lining pipe comprises an outer pipe 1, and a lining pipe 2 is inserted into the inner side of the outer pipe 1;
the lining pipe 2 comprises, from the outside to the inside: the composite pipe comprises a rubber pipe layer 21, a glass fiber pipe layer 22, a PE pipe layer 23 and a polyethylene pipe layer 24, wherein the inner side of the polyethylene pipe layer 24 is coated with a silicon carbide coating 25;
the PE pipe layer 23 and the polyethylene pipe layer 24 are both subjected to heat treatment;
the PE tube layer 23 is mixed with glass crystals.
A supporting mechanism 3 for preventing the lining pipeline 2 from softening and deforming by heating is arranged inside the rubber tube layer 21;
the inner side of the lining pipeline 2 is provided with a fixing mechanism 4 which increases the connection strength with the outer pipeline 1.
The supporting mechanism 3 is wrapped by a supporting inner cavity 31 arranged in the rubber tube layer 21, and a supporting frame 32 is fixedly connected in the supporting inner cavity 31.
The supporting inner cavities 31 are distributed at intervals, and the interval distance is inversely proportional to the hot melt ratio of the lining pipeline 2;
the hot melt ratio is the change ratio of temperature rise and bending degree of a one-meter-long lining pipeline 2 with two fixed ends;
therefore, the lining pipeline 2 is easier to deform, and the supporting points are more, so that the supporting effect is better;
the supporting inner cavities 31 are communicated with each other, the supporting frames 32 are communicated with each other, and the difference between the outer diameter of the lining pipeline 2 and the inner diameter of the outer pipeline 1 is 2-5 mm;
the support frame 32 has a closed cavity therein.
The supporting inner cavity 31 and the supporting frame 32 are filled with gas with thermal expansion coefficient larger than air, and the gas can be carbon dioxide, so that the supporting inner cavity is firmer and has better supporting effect after being heated and expanded.
The support frame 32 is made of a surrounding corrugated plate, and upper and lower surfaces of the corrugated plate are fixedly connected with upper and lower inner walls of the support cavity 31.
The support frame 32 is made of a set of mutually surrounding corrugated pipes, and the upper and lower surfaces of the corrugated pipes are fixedly connected with the upper and lower inner walls of the support cavity 31.
The force required to deform the cushion 41 is greater than the force required to deform the polyethylene pipe layer 24 and the impact plate 42 is inclined in the direction of flow of the inner lining pipe 2.
The cushion 41 is located at the center of the pressure tank 44 on the vertical plane, and the connection point of the support plate 43 to the lining pipe 2 extends outside the pressure tank 44 on the vertical plane.
The attachment point of the support plate 43 to the impingement plate 42 is located between the center point of the impingement plate 42 and the liner conduit 2.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a bushing pipe in ultrahigh temperature polymer polyethylene, includes outer pipeline (1), the inboard of outer pipeline (1) is pegged graft and is had inside lining pipeline (2), its characterized in that:
the lining pipe (2) comprises from outside to inside: the composite pipe comprises a rubber pipe layer (21), a glass fiber pipe layer (22), a PE pipe layer (23) and a polyethylene pipe layer (24), wherein the inner side of the polyethylene pipe layer (24) is coated with a silicon carbide coating (25);
a supporting mechanism (3) for preventing the lining pipeline (2) from softening and deforming by heating is arranged in the rubber tube layer (21);
and a fixing mechanism (4) for increasing the connection strength with the outer pipeline (1) is arranged on the inner side of the lining pipeline (2).
2. The ultra-high temperature high molecular polyethylene lining pipe according to claim 1, characterized in that: glass crystals are mixed into the PE tube layer (23).
3. The ultra-high temperature high molecular polyethylene lining pipe according to claim 1, characterized in that: the supporting mechanism (3) is wrapped and opened in a supporting inner cavity (31) of the rubber tube layer (21), and a supporting frame (32) is fixedly connected in the supporting inner cavity (31).
4. The ultra-high temperature high molecular polyethylene lining pipe according to claim 3, characterized in that: the supporting inner cavities (31) are distributed at intervals, and the interval distance is inversely proportional to the hot melt ratio of the lining pipeline (2);
the hot melting ratio is the change ratio of temperature rise and bending of a one-meter-long lining pipeline (2) with two fixed ends;
the supporting inner cavities (31) are communicated with each other;
the support frame (32) is internally provided with a closed cavity.
The supporting inner cavity (31) and the supporting frame (32) are filled with gas with a thermal expansion coefficient larger than that of air.
5. The ultra-high temperature high molecular polyethylene lining pipe according to claim 4, characterized in that: the support frame (32) is made through the buckled plate that encircles, and the upper and lower surface of buckled plate and the upper and lower inner wall fixed connection who supports inner chamber (31).
6. The ultra-high temperature high molecular polyethylene lining pipe according to claim 4, characterized in that: the supporting frame (32) is made of a group of mutually surrounding corrugated pipes, and the upper and lower surfaces of the corrugated pipes are fixedly connected with the upper and lower inner walls of the supporting inner cavity (31).
7. The ultra-high temperature high molecular polyethylene lining pipe according to claim 3, characterized in that: fixed establishment (4) distribute in the interval that supports inner chamber (31), fixed establishment (4) are including embedded bolster (41) inboard at polyethylene pipe layer (24), the fixed surface of bolster (41) is connected with strikes board (42), fixedly connected with backup pad (43) between the side of striking board (42) and polyethylene pipe layer (24), pressure groove (44) have been seted up in the outside on rubber tube layer (21).
8. The ultra-high temperature high molecular polyethylene lining pipe according to claim 7, characterized in that: the force required by deformation of the soft pad (41) is greater than the force required by deformation of the polyethylene pipe layer (24), and the impact plate (42) inclines towards the flowing direction of the lining pipeline (2).
9. The ultra-high temperature high molecular polyethylene lining pipe according to claim 7, characterized in that: the cushion (41) is located at the center of the pressure groove (44) on the vertical plane, and the connecting point of the supporting plate (43) and the lining pipeline (2) extends out of the pressure groove (44) on the vertical plane.
10. The ultra-high temperature high molecular polyethylene lining pipe according to claim 7, characterized in that: the connecting point of the supporting plate (43) and the impact plate (42) is positioned between the central point of the impact plate (42) and the lining pipeline (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111581692.XA CN114321514B (en) | 2021-12-22 | 2021-12-22 | Ultrahigh temperature high polymer polyethylene lining pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111581692.XA CN114321514B (en) | 2021-12-22 | 2021-12-22 | Ultrahigh temperature high polymer polyethylene lining pipe |
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| CN114321514A true CN114321514A (en) | 2022-04-12 |
| CN114321514B CN114321514B (en) | 2023-09-29 |
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| CN214466723U (en) * | 2021-03-30 | 2021-10-22 | 南京红复玻璃钢有限公司 | Glass fiber reinforced plastic sand inclusion pipe with anticorrosive frame construction of inside lining |
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- 2021-12-22 CN CN202111581692.XA patent/CN114321514B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19540969A1 (en) * | 1995-11-03 | 1997-05-07 | Basf Ag | Plastic pipe for lining flue useful for restoration or in new chimneys |
| CN204176247U (en) * | 2014-10-30 | 2015-02-25 | 江西王牌建设工程集团有限公司 | A kind of underground piping system device with lining |
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| Publication number | Publication date |
|---|---|
| CN114321514B (en) | 2023-09-29 |
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