阅读说明：本技术 一种埋地pc/abs合金管及其制备方法 (Buried PC/ABS alloy pipe and preparation method thereof ) 是由 陈玉龙 马扬威 金杨福 于 2021-09-07 设计创作，主要内容包括：本发明涉及埋地管道材料结构设计领域,有其涉及一种埋地PC/ABS合金管及其制备方法。其包括：管道主体和缠绕结构；所述缠绕结构轴向螺旋或环形缠绕在管道主体外表面；所述缠绕结构和管道主体均采用PC/ABS合金塑料进行挤塑成型制备；所述缠绕结构采用曲线形挤出头挤出成型在管道主体的外表面；所述曲线形两端对准管道主体外表面,挤出成型后在管道主体的轴向截面上缠绕结构呈曲线形且其两端与管道主体外表面连接、形成封闭且沿缠绕结构设置在缠绕结构与管道主体外表面之间的空槽。本发明埋地PC/ABS合金管能够非常显著地提高埋地管道的环刚度,普遍达到3.5 MPa以上；制备过程简单高效,材料成本相对较为低廉。(The invention relates to the field of buried pipeline material structure design, in particular to a buried PC/ABS alloy pipe and a preparation method thereof. It includes: a pipe body and a winding structure; the winding structure is spirally or annularly wound on the outer surface of the pipeline main body in the axial direction; the winding structure and the pipeline main body are both prepared by adopting PC/ABS alloy plastics for extrusion molding; the winding structure is extruded and molded on the outer surface of the pipeline main body by adopting a curved extrusion head; the two ends of the curve are aligned with the outer surface of the pipeline main body, the winding structure is in the curve shape on the axial cross section of the pipeline main body after extrusion molding, and the two ends of the winding structure are connected with the outer surface of the pipeline main body to form a closed empty groove which is arranged between the winding structure and the outer surface of the pipeline main body along the winding structure. The buried PC/ABS alloy pipe can remarkably improve the ring stiffness of buried pipelines, and generally reaches more than 3.5 MPa; the preparation process is simple and efficient, and the material cost is relatively low.)

1. A buried PC/ABS alloy pipe is characterized by comprising:

a pipe body and a winding structure;

the winding structure is spirally or annularly wound on the outer surface of the pipeline main body in the axial direction;

the winding structure and the pipeline main body are both prepared by adopting PC/ABS alloy plastics for extrusion molding;

the winding structure is extruded and molded on the outer surface of the pipeline main body by adopting a curved extrusion head;

the two ends of the curve are aligned with the outer surface of the pipeline main body, the winding structure is in the curve shape on the axial cross section of the pipeline main body after extrusion molding, and the two ends of the winding structure are connected with the outer surface of the pipeline main body to form a closed empty groove which is arranged between the winding structure and the outer surface of the pipeline main body along the winding structure.

2. A buried PC/ABS alloy pipe according to claim 1,

a sunken groove sunken towards the pipeline main body is formed outside the winding structure;

the grooves are spirally or annularly arranged along the winding structure.

3. A buried PC/ABS alloy pipe according to claim 1 or 2,

the winding structure is formed by extrusion of an M-shaped extrusion head.

4. A buried PC/ABS alloy pipe according to claim 1,

and a reinforcing member penetrates through the hollow groove along the winding structure.

5. A buried PC/ABS alloy pipe according to claim 4,

the cross section of the reinforcing member is curved.

6. A buried PC/ABS alloy pipe according to claim 1 or 4,

the extrusion molding materials required by extrusion molding of the winding structure and the pipeline main body are composed of the following substances in percentage by mass:

6-18% of hydrogel, 1-3% of zinc oxide, 2-6% of stearic acid and the balance of PC/ABS alloy plastic.

7. A buried PC/ABS alloy pipe according to claim 6,

the hydrogel is BC/PEG composite hydrogel.

8. A buried PC/ABS alloy pipe according to claim 7,

the BC/PEG composite hydrogel is prepared by the following method:

dissolving PEG in excessive water at 35-45 ℃ to obtain a PEG aqueous solution, adding an initiator, stirring until the PEG aqueous solution is completely dissolved, adding bacterial cellulose powder, heating to 75-85 ℃, stirring and dissolving uniformly, cooling to 60-65 ℃, inserting an electrode for high-voltage discharge until the solution is in a gel state, reacting at constant temperature for 2-3 h, and filtering to remove liquid to obtain the BC/PEG composite hydrogel.

9. A buried PC/ABS alloy pipe according to claim 6,

the preparation method of the extrusion molding material comprises the following steps:

placing the dehydrated hydrogel in an alcohol solvent, adding zinc oxide powder into the alcohol solvent, carrying out ultrasonic dispersion to enable the zinc oxide powder to be loaded on the hydrogel, filtering, freeze-drying until the weight of the zinc oxide powder is 20-30% of the saturated weight to obtain the hydrogel loaded with the zinc oxide, cutting the hydrogel into blocks with the particle size of less than or equal to 10 x 10 mm, and mixing the blocks with PC/ABS alloy plastic particles and stearic acid to obtain the extrusion molding material.

10. A preparation method of buried PC/ABS alloy pipe is characterized in that,

the method comprises the following steps:

1) preparing a pipeline main body by extrusion molding;

2) preparing a winding structure on the outer surface of the pipeline main body in an extrusion molding mode, or inserting a reinforcing member into a hollow groove of the winding structure after preparing the winding structure;

the extrusion molding temperature is 180-210 ℃.

Technical Field

The invention relates to the field of buried pipeline material structure design, in particular to a buried PC/ABS alloy pipe and a preparation method thereof.

Background

The pipeline is taken as an important facility for material conveying, and is self-evidently important for modern industrial and agricultural production and people's life. Pipeline transportation is the fifth largest phenomenon, except for water, shipping, road and railway

The production transportation mode occupies a very important position in national construction, and is thus likened to 'underground lifeline engineering'. At present, in the aspect of municipal buried pipeline application, the PC/ABS alloy pipe has the advantages of corrosion resistance, light weight, good sealing property, smooth pipe wall, long service life, large flow capacity, high construction speed, convenient transportation and installation, large deformation capacity for adapting to field settlement and the like. There has been a trend to replace traditional pipe in certain application areas, such as municipal drainage.

In the field of buried pipe water supply and drainage, the sub-high pressure to be borne by a water supply pipe generally reaches 2.0-3.5 MPa of nominal pressure, so that in the working environment that the interior of a buried pipe water supply and drainage pipe needs to bear the sub-high pressure, the traditional single pipeline ring is low in rigidity, and leakage and damage are easy to occur due to variable underground pressure.

Disclosure of Invention

The invention provides a buried PC/ABS alloy pipe, which aims to solve the problems that the traditional buried pipeline has low ring rigidity, is easy to damage and has complex natural environment, the traditional pipeline has poor adaptability to the natural environment, and is easy to damage and damage due to the influence of rocks, insect pests and the like in the natural environment after being buried besides the condition of high-pressure damage of water delivery times.

The invention aims to:

firstly, the ring stiffness of the pipeline can be obviously improved;

secondly, the stability of the pipeline arrangement is enhanced;

and thirdly, the adaptability of the pipeline to the natural environment is improved.

In order to achieve the purpose, the invention adopts the following technical scheme.

A buried PC/ABS alloy pipe comprises

A pipe body and a winding structure;

the winding structure is spirally or annularly wound on the outer surface of the pipeline main body in the axial direction;

the winding structure and the pipeline main body are both prepared by adopting PC/ABS alloy plastics for extrusion molding;

the winding structure is extruded and molded on the outer surface of the pipeline main body by adopting a curved extrusion head;

the two ends of the curve are aligned with the outer surface of the pipeline main body, the winding structure is in the curve shape on the axial cross section of the pipeline main body after extrusion molding, and the two ends of the winding structure are connected with the outer surface of the pipeline main body to form a closed empty groove which is arranged between the winding structure and the outer surface of the pipeline main body along the winding structure.

The invention adopts a special spiral structure or an annular structure to match with the pipeline main body, firstly, the stability of underground arrangement of the buried pipe can be improved, relative sliding is not easy to occur, the continuity of the whole pipeline is ensured not to be easily damaged, and the environmental adaptability is improved to a certain extent. On the other hand, the ring rigidity of the pipeline can be effectively improved by the annular winding structure or the spiral winding structure, the same commercial PC/ABS alloy plastic (230 NH) is adopted for preparation comparison of the pipeline, and compared with an independent pipeline main body, the ring rigidity of the buried pipeline with the spiral structure or the annular structure winding structure can be improved by more than 40%.

Meanwhile, compared with a solid winding structure, the hollow winding structure has the advantages that the ring stiffness strengthening effect which can be actually achieved is basically equivalent, materials can be further saved, and the overall weight of the buried pipeline is reduced.

As a preference, the first and second liquid crystal compositions are,

a sunken groove sunken towards the pipeline main body is formed outside the winding structure;

the grooves are spirally or annularly arranged along the winding structure.

The arrangement of the sunken grooves can further improve the overall structural stability of the buried pipeline, further improve the ring rigidity of the buried pipeline, and meanwhile, the structure similar to a thread is formed on the outer surface of the winding structure, so that the arrangement stability of the buried pipeline can be improved more remarkably.

As a preference, the first and second liquid crystal compositions are,

the winding structure is formed by extrusion of an M-shaped extrusion head.

The winding structure of M shape itself has good structural stability promptly, to bending resistance, anti-shear and compressive property etc. homoenergetic comparatively obvious promotion.

As a preference, the first and second liquid crystal compositions are,

and a reinforcing member penetrates through the hollow groove along the winding structure.

The reinforcing member can form further support to strengthen winding arrangement, and two split type structures compare in solid structure completely, possess more excellent shock-absorbing capacity, promote to limit compressive capacity to some extent.

As a preference, the first and second liquid crystal compositions are,

the cross section of the reinforcing member is curved.

The practical optimal cross-sectional configuration of the reinforcing member is equivalent to that of the winding structure, and if the winding structure is M-shaped in cross section, the cross section of the reinforcing member is also M-shaped.

As a preference, the first and second liquid crystal compositions are,

the extrusion molding materials required by extrusion molding of the winding structure and the pipeline main body are composed of the following substances in percentage by mass:

6-18% of hydrogel, 1-3% of zinc oxide, 2-6% of stearic acid and the balance of PC/ABS alloy plastic.

In the material proportion, the alloy plastic is used as a main and common main material, has the performances of hydrolysis resistance, heat resistance, flame retardance and the like, and is used as a main component. The extrusion molding material is reinforced by hydrogel, and the toughness of the whole pipeline is improved mainly through the hydrogel, so that the extrusion molding material has a stronger extreme pressure resistance threshold value, is less prone to rupture under the condition of extreme high pressure, and can reduce the specific gravity of the material to a certain extent and realize the lightweight of the pipeline.

As a preference, the first and second liquid crystal compositions are,

the hydrogel is BC/PEG composite hydrogel.

The hydrogel can form an interpenetrating cross-linked network structure, and based on the characteristics of PEG, the hydrogel can more effectively form a cross-linked crystal structure, can form effective stress absorption and release through stretching and releasing circulation in directional stress, and can have certain self-repairing characteristics under the condition of matching with BC (bacterial cellulose), and surface scratch caused by vibration and other factors in natural environment can be realized, and certain self-repairing can be realized, so that the problem that the buried pipeline is easy to cause local fracture and damage after locally generating a large amount of scratch damage is avoided.

In addition, the BC has the characteristic of strong water retention, and the performance of the composite hydrogel can be effectively improved. The problems of drying and pulverization and the like are avoided, and the interpenetrating network structure is broken and damaged.

As a preference, the first and second liquid crystal compositions are,

the BC/PEG composite hydrogel is prepared by the following method:

dissolving PEG in excessive water at 35-45 ℃ to obtain a PEG aqueous solution, adding an initiator, stirring until the PEG aqueous solution is completely dissolved, adding bacterial cellulose powder, heating to 75-85 ℃, stirring and dissolving uniformly, cooling to 60-65 ℃, inserting an electrode for high-voltage discharge until the solution is in a gel state, reacting at constant temperature for 2-3 h, and filtering to remove liquid to obtain the BC/PEG composite hydrogel.

The composite hydrogel prepared by the preparation method takes PEG as a main body, the BC assists in forming an interpenetrating network structure, and meanwhile, the BC can be wound on a PEG gel network to a certain extent. In addition, the discharge voltage of the high-voltage discharge should be controlled to be 560-580V, the continuous discharge time is about 6-8 min, compared with the rest of high-voltage excited composite PEG gel polymerization reaction, the excitation can be realized at a lower voltage, the preparation cost is reduced, and the high water absorption rate can be kept and can reach more than 180 times.

In addition, generally, the amount of BC should be about 8 to 12 wt% based on the total weight of BC and PEG.

As a preference, the first and second liquid crystal compositions are,

the preparation method of the extrusion molding material comprises the following steps:

placing the dehydrated hydrogel in an alcohol solvent, adding zinc oxide powder into the alcohol solvent, carrying out ultrasonic dispersion to enable the zinc oxide powder to be loaded on the hydrogel, filtering, freeze-drying until the weight of the zinc oxide powder is 20-30% of the saturated weight to obtain the hydrogel loaded with the zinc oxide, cutting the hydrogel into blocks with the particle size of less than or equal to 10 x 10 mm, and mixing the blocks with PC/ABS alloy plastic particles and stearic acid to obtain the extrusion molding material.

According to the preparation method, zinc oxide is loaded on the hydrogel, a small amount of water in the hydrogel can ensure that the hydrogel is not pulverized and loses the strengthening effect due to excessive dehydration at high temperature in the extrusion molding process, and the PC/ABS alloy plastic cannot be effectively smelted and extruded in the extrusion molding process due to excessive water content. In the process, the strong water-holding capacity of the BC and PEG after matching can ensure that the PC/ABS alloy plastic is relatively dry in the environment, effective dry-wet separation is realized, and in addition, the zinc oxide and the stearic acid can be matched and reacted to supplement the water loss of the hydrogel in the extrusion molding process and form certain filling reinforcement at the same time.

A preparation method of buried PC/ABS alloy pipe,

the method comprises the following steps:

1) preparing a pipeline main body by extrusion molding;

2) preparing a winding structure on the outer surface of the pipeline main body in an extrusion molding mode, or inserting a reinforcing member into a hollow groove of the winding structure after preparing the winding structure;

the extrusion molding temperature is 180-210 ℃.

The present invention utilizes lower extrusion temperatures compared to conventional PC/ABS extrusion temperatures to ensure the integrity of the hydrogel structure.

The invention has the beneficial effects that:

1) the ring stiffness of the buried pipeline can be remarkably improved and generally reaches more than 3.5 MPa;

2) the material has good chemical stability and environmental adaptability, and the underground corrosion prevention problem of the pipeline is not required to be considered;

3) the preparation process is simple and efficient, and the material cost is relatively low;

4) the pipeline fixing property is excellent, and the continuity of the pipeline can be ensured;

5) has certain self-repairing performance and longer service life.

Drawings

FIG. 1 is a schematic view of an axial structure of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is an enlarged schematic view of a portion of the winding arrangement;

FIG. 4 is a schematic axial cross-sectional view of the buried PC/ABS alloy pipe of the present invention;

in the figure: 100 pipe body, 200 wound structure, 201 empty groove, 202 recessed groove, 300 reinforcing member.

Detailed Description

The invention is described in further detail below with reference to specific embodiments and the attached drawing figures. Those skilled in the art will be able to implement the invention based on these teachings. Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Unless otherwise specified, the raw materials used in the examples of the present invention are all commercially available or available to those skilled in the art; unless otherwise specified, the methods used in the examples of the present invention are all those known to those skilled in the art.

Example 1

Preparation of BC/PEG composite hydrogel:

dissolving 45 g of solid PEG powder in 2000 g of deionized water at 40 ℃ to obtain a PEG aqueous solution, adding N' N-methylene bisacrylamide, stirring until the solid PEG aqueous solution is completely dissolved, adding 5 g of bacterial cellulose powder, heating to 80 ℃, stirring and dissolving uniformly, cooling to 65 ℃, inserting an electrode, performing 580V high-voltage discharge for 6 min till the solution is in a gel state, performing constant-temperature reaction for 2 h, and filtering to remove liquid to obtain the BC/PEG composite hydrogel.

Example 2

Preparation of BC/PEG composite hydrogel:

dissolving 44 g of solid PEG powder in 2000 g of deionized water at 45 ℃ to obtain a PEG aqueous solution, adding N' N-methylene bisacrylamide, stirring until the solid PEG aqueous solution is completely dissolved, adding 6 g of bacterial cellulose powder, heating to 85 ℃, stirring and dissolving uniformly, cooling to 65 ℃, inserting an electrode, performing 580V high-voltage discharge for 7 min till the solution appears a gel-like object, performing constant-temperature reaction for 2 h, and filtering to remove liquid to obtain the BC/PEG composite hydrogel.

Example 3

Preparation of BC/PEG composite hydrogel:

dissolving 46 g of solid PEG powder in 2000 g of deionized water at 35 ℃ to obtain a PEG aqueous solution, adding N' N-methylene bisacrylamide, stirring until the solid PEG aqueous solution is completely dissolved, adding 4 g of bacterial cellulose powder, heating to 75 ℃, stirring and dissolving uniformly, cooling to 60 ℃, inserting an electrode, performing 560V high-voltage discharge for 8 min till the solution appears a gel-like object, performing constant-temperature reaction for 2 h, and filtering to remove liquid to obtain the BC/PEG composite hydrogel.

Example 4

The preparation method of the extrusion molding material comprises the following steps:

after the hydrogel prepared in example 1 was subjected to ethanol immersion displacement dehydration for 20 min, 12 g of the dehydrated hydrogel was immersed in a t-butanol solvent, 2 g of zinc oxide powder was added to the t-butanol solvent, the zinc oxide powder was supported on the hydrogel by ultrasonic dispersion, and after filtration, freeze-drying was carried out until the weight thereof became 25% of the saturated weight to obtain a zinc oxide-supported hydrogel, which was cut into pieces having a particle size of 10 × 10 × 10 mm or less, and then uniformly mixed with 82 g of PC/ABS alloy plastic particles and 4 g of stearic acid to obtain an extrusion molding material.

Example 5

The preparation method of the extrusion molding material comprises the following steps:

after the hydrogel prepared in example 2 was subjected to ethanol immersion displacement dehydration for 20 min, 12 g of the dehydrated hydrogel was immersed in a t-butanol solvent, 2 g of zinc oxide powder was added to the t-butanol solvent, the zinc oxide powder was supported on the hydrogel by ultrasonic dispersion, and after filtration, freeze-drying was carried out until the weight was 25% of the saturated weight to obtain a zinc oxide-supported hydrogel, which was cut into pieces having a particle size of 10 × 10 × 10 mm or less, and then uniformly mixed with 82 g of PC/ABS alloy plastic particles and 4 g of stearic acid to obtain an extrusion molding material.

Example 6

The preparation method of the extrusion molding material comprises the following steps:

after the hydrogel prepared in example 3 was subjected to ethanol immersion displacement dehydration for 20 min, 12 g of the dehydrated hydrogel was immersed in a t-butanol solvent, 2 g of zinc oxide powder was added to the t-butanol solvent, the zinc oxide powder was supported on the hydrogel by ultrasonic dispersion, and after filtration, freeze-drying was carried out until the weight was 25% of the saturated weight to obtain a zinc oxide-supported hydrogel, which was cut into pieces having a particle size of 10 × 10 × 10 mm or less, and then uniformly mixed with 82 g of PC/ABS alloy plastic particles and 4 g of stearic acid to obtain an extrusion molding material.

Example 7

The preparation method of the extrusion molding material comprises the following steps:

after the hydrogel prepared in example 1 was subjected to ethanol immersion displacement dehydration for 20 min, 6 g of the dehydrated hydrogel was immersed in a t-butanol solvent, 1 g of zinc oxide powder was added to the t-butanol solvent, and ultrasonic dispersion was carried out to load the zinc oxide powder on the hydrogel, and after filtration and freeze-drying, the hydrogel loaded with zinc oxide was obtained by weighing 25% of the saturated weight, and after cutting into blocks having a particle size of 10 × 10 × 10 mm or less, the blocks were uniformly mixed with 91 g of PC/ABS alloy plastic particles and 3 g of stearic acid to obtain an extrusion molding material.

Example 8

The preparation method of the extrusion molding material comprises the following steps:

the hydrogel prepared in example 1 was subjected to ethanol immersion displacement dehydration for 20 min, 18 g of the dehydrated hydrogel was immersed in a t-butanol solvent, 3 g of zinc oxide powder was added to the t-butanol solvent, ultrasonic dispersion was carried out to load the zinc oxide powder on the hydrogel, filtration was carried out, freeze-drying was carried out until the weight was 25% of the saturated weight to obtain a zinc oxide-loaded hydrogel, the hydrogel was cut into pieces having a particle size of 10 × 10 × 10 mm or less, and then the zinc oxide-loaded hydrogel was uniformly mixed with 73 g of PC/ABS alloy plastic particles and 6 g of stearic acid to obtain an extrusion molding material.

Comparative example 1

The extruded material was prepared as in example 1, except that:

silicon oxide is used for replacing zinc oxide, and sodium stearate is used for replacing stearic acid.

The preparation tests were carried out with equal masses of the extruded masses of example 1 and comparative example 1, using extrusion temperatures of 180 ℃ and 210 ℃ respectively.

At 180 ℃, the product obtained by extruding the material of comparative example 1 was designated product A1 and the product obtained by extruding the material of example 1 was designated product A2; at 210 deg.C, the product obtained from the extruded material of comparative example 1 was labeled product B1 and the product obtained from the extruded material of example 1 was labeled product B2.

Product a1, product a2, product B1 and product B2 were weighed and each product was dry-weighed using an oven-method plastic moisture meter. The weighing results showed that product a1 weighed only about 96% of product a2 and product B1 weighed only 94% of product B2. The dry mass difference of the product A1 and the product A2 after the oven-method plastic moisture meter is dried is less than 0.5 percent, and the dry mass difference of the product B1 and the product B2 after the oven-method plastic moisture meter is dried is less than 0.5 percent, which shows that the actual mass difference of the actual product A1 and the actual mass difference of the product A2, the actual mass difference of the product B1 and the actual mass difference of the product B2 are generated by the water content of the actual product A1 and the actual mass difference of the product A2, and the actual mass difference of the product B1 and the actual mass difference of the product B2. Zinc oxide and stearic acid do contribute significantly to the retention of hydrogel moisture content during extrusion.

Example of production of concrete pipe

The above-obtained extrusion material was used to prepare a buried PC/ABS alloy pipe by extrusion molding, the pipe body 100, the winding structure 200, and the reinforcing member 300 were prepared by extrusion molding, and the reinforcing member 300 was separately prepared to penetrate into the empty groove 201 of the winding structure 200, to wind the structure 200, and compared with a commercially available PC/ABS alloy pipe, as shown in the following table.

In the preparation example, the pipe main body 100 is adopted to adopt 210 ℃ extrusion temperature, so that the leveling property is better, the winding structure 200 is directly prepared on the outer surface of the pipe main body 100 by adopting 180 ℃ extrusion temperature, so that the configuration is complete, and the reinforcing member 300 adopts 205 ℃ extrusion temperature, so that the surface is smooth.

In particular, the method comprises the following steps of,

in the above-mentioned pipeline, except for the pipeline G, the pipeline J and the pipeline K, as shown in fig. 1 and 2, the pipeline main body 100 and the winding structure 200 are provided, the winding structure 200 is directly prepared on the outer surface of the pipeline main body 100 by means of extrusion molding, and the pipeline G, the pipeline J and the pipeline K are all only provided with the pipeline main body 100;

the winding structure 200 is spirally wound around the outer surface of the pipeline main body 100 as shown in fig. 1 and fig. 2, the axial cross section of the winding structure 200 along the pipeline main body 100 is a curved shape, two ends of the curved shape are connected with the outer surface of the pipeline main body 100, a hollow groove 201 is formed between the winding structure 200 and the outer surface of the pipeline main body 100, and a recessed groove 202 is formed in the outer surface of the winding structure 200.

And among the above-mentioned pipes, the pipe a, the pipe B, the pipe C, the pipe D, the pipe E and the pipe H are further provided with a reinforcing member 300, as shown in fig. 3 and 4, the reinforcing member 300 is also M-shaped in cross section, and is separately molded and prepared to be inserted into the empty groove 201 of the winding structure 200.

The above pipes were subjected to performance tests, and the test results are shown in the following table. All tests are carried out by taking ten equal-specification pipelines (standard 600 mm inner diameter pipeline and length of 180 cm), and the test results are recorded by taking the mean value.

In the above test, the limiting oxygen index was carried out in accordance with the GB/T2460-93 standard.

It can be seen from the above comparison that for an overall buried pipeline, the arrangement of the winding structure 200 can significantly improve the ring stiffness and the pressure that can be carried by the actual rating, and it can be seen from comparing pipeline I and pipeline J, and comparing pipeline F and pipeline G that it can better maintain the structure of its pipeline at a rated pressure of 3.0 MPa, and it can also be seen from the test result of the ring stiffness obviously and directly.

In addition, comparing the ring stiffness test results also shows that the addition of the reinforcing member 300 also has a certain lifting effect on the pipe pressure resistance. And further performing vibration tests on the pipeline A, the pipeline F and the pipeline H, applying a rated pressure of 3.5MPa downwards to compact the pipeline, placing the pipeline on a vibration test bed, controlling the amplitude to be 5 mm and the frequency to be 90 Hz, and keeping for 24 hours until the pipeline A is not damaged, so that a slight crack appears on the surface of the pipeline F, and a more serious crack appears on the pipeline H. The reinforcing member 300 is shown to be capable of remarkably improving the anti-vibration performance of the pipeline, the pipeline A obviously has stronger adaptability to complex natural environments, and compared with the pipeline A and the pipeline H, the special extrusion molding material has an obvious effect of improving the toughness of the pipeline after the hydrogel is added.

And carrying out an artificial accelerated aging test on the pipeline A and the pipeline H, wherein the test is carried out according to GB/T16259-2008 standard. After aging for 1000H, the mechanical property reduction rate of the pipeline A is less than or equal to 2 percent, and the mechanical property reduction rate of the pipeline H is about 3.6 percent. By combining the detection results in the table, the special extrusion molding material used in the invention can be obviously seen to remarkably improve the mechanical property and the anti-aging capability of the buried pipeline compared with pure PC/ABS alloy plastic.

In addition, according to the detection results of the above table, it can be clearly seen by comparing the detection results of the pipeline a, the pipeline D and the pipeline E that the addition amount of the hydrogel has a significant influence on the mechanical properties of the pipeline. The ring stiffness of the pipeline is reduced after being increased along with the addition of the hydrogel, the zinc oxide and the stearic acid, the hydrogel mainly influences the mechanical property, and the peak value of the mechanical property is reached when the addition of the hydrogel is about 12 wt% of the material amount. The reinforcing effect is poor when the consumption of the hydrogel is less, so the actual reinforcing amplitude is limited, and the mechanical property of the PC/ABS as the main raw material is weakened when the consumption of the hydrogel is excessive. Therefore, the amount of the hydrogel to be added needs to be appropriately selected.

Comparing pipeline A, pipeline H, pipeline L and pipeline M, it can obviously be seen that not all aquogel all can play excellent mechanical properties and strengthen the effect, under the condition of using PEG aquogel alone, the mechanical properties of pipeline L compares and has a slight promotion in pipeline H, nevertheless has very obvious decline in comparing pipeline A, and pipeline M's ring rigidity is not as much as pipeline H even.

The outer surfaces of the pipeline main bodies 100 of the pipeline A, the pipeline H, the pipeline L and the pipeline M are respectively carved with ten scratches with the depth of 1 mm, the width of 0.5 mm and the length of 15 mm. After being placed for 24H, the surface scratches of the pipeline A are basically disappeared, and the surface scratches of the pipeline H, the pipeline L and the pipeline M are basically unchanged. The BC/PEG hydrogel used by the invention can enable the buried PC/ABS alloy pipe to generate certain self-repairing performance, and the pipeline with the self-repairing performance has stronger adaptability in a complex natural environment, and is not easy to generate weak points and further damage due to continuous accumulation of damage forms such as scratches and the like.

In conclusion, the technical scheme of the invention is comprehensively improved from two aspects of the structure and the material of the buried PC/ABS alloy pipe, so that the buried PC/ABS alloy pipe has more comprehensive and excellent performance.