Hexagonal reinforced bellows

Abstract

The application discloses a kind of six edge reinforced bellows, belong to the technical field of bellows production, including pipe body, one end of pipe body is inserted end, the other end of pipe body is receiving end, inserted end and receiving end are mutually matched, the middle part of pipe body outside is equipped with reinforcing ring, the middle part of pipe body outside is equipped with reinforcing rib between adjacent reinforcing ring, reinforcing ring includes twelve edges, six edges between which are the edge part of reinforcing ring, edge part is planar, six groups of edge part constitute the six edge of bellows, the edge between adjacent edge part is the arc part of reinforcing ring, arc part is circular arc shape.The six edge reinforced bellows is composed of the following weight parts of raw materials: polyvinyl chloride resin 85-110 parts; reinforcing filler 20-30 parts, compatible agent 4-8 parts, antioxidant 2-5 parts, lubricant 2-5 parts.The application discloses a kind of bellows with six edges and raw material composition and preparation method, finally realize the comprehensive promotion of mechanical strength of six edge reinforced bellows.

Description

Technical Field

[0001] This invention belongs to the field of corrugated pipe manufacturing technology, specifically relating to a hexagonal reinforced corrugated pipe. Background Technology

[0002] Corrugated pipes are pipe components used to compensate for axial, lateral, and angular displacements in pipelines or equipment caused by temperature differences or fluctuations. They are widely used in aerospace, hydraulics, power, petrochemicals, shipbuilding, and heating networks.

[0003] Existing corrugated pipes generally consist of an inner layer and an outer layer, both of which are rotary structures with smooth surfaces. They can be connected to adjacent corrugated pipes via a sleeve connection structure. However, during the process of burying the corrugated pipe underground, the pressure on the corrugated pipe is not balanced enough, and the stress relief is not ideal, which can easily lead to angular deflection or positional sway. This may reduce the sealing performance of the sleeve connection structure. Therefore, by improving the structure of the corrugated pipe and enhancing its stability and mechanical properties after burying it underground, the service life of the corrugated pipe can be effectively extended. Summary of the Invention

[0004] The purpose of this invention is to provide a hexagonal reinforced corrugated pipe, which improves the stability and mechanical properties of the corrugated pipe after it is buried underground by improving its structure.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A hexagonal reinforced corrugated pipe includes a pipe body, one end of which is a plug-in end and the other end of which is a receiving end. The plug-in end and the receiving end cooperate with each other. A reinforcing ring is formed in the middle of the outer side of the pipe body. A reinforcing rib is formed in the middle of the outer side of the pipe body between adjacent reinforcing rings. The reinforcing ring includes twelve sides, of which six alternating sides are the edges of the reinforcing ring. The edges are planar. The six sets of edges constitute the hexagonal shape of the corrugated pipe. The edges between adjacent edges are the arcs of the reinforcing ring. The arcs are circular arcs.

[0007] Furthermore, the reinforcing rings are distributed in a ring at equal intervals.

[0008] Furthermore, the height of the reinforcing rib is less than the height of the reinforcing ring.

[0009] Furthermore, the arc portion has a groove extending through the arc portion along the radial direction of the corrugated pipe.

[0010] Furthermore, the hexagonal reinforced corrugated pipe is composed of the following parts by weight of raw materials:

[0011]

[0012] The reinforcing filler is a mixture of spherical alumina, activated talc, and modified calcium carbonate in a weight ratio of 35-45:22-25:15-17.

[0013] Furthermore, the spherical alumina mixture is composed of spherical alumina with a median particle size of 65-75 μm and spherical alumina with a median particle size of 25-30 μm mixed at a mass ratio of 55-75:12-14.

[0014] Further, the activated talc powder is prepared by the following steps:

[0015] Talc powder is soaked in an acetic acid solution with a pH of 4.0-4.2 and stirred at room temperature for 30 minutes. It is then removed and dried in a constant temperature drying oven at 100-120℃ until constant weight to obtain acidified talc powder. The acidified talc powder is then soaked in a 95% ethanol aqueous solution, and γ-aminopropyltriethoxysilane is added. The temperature is raised to 55-60℃ and stirred at a constant temperature for 2-3 hours. It is then removed and dried in a constant temperature drying oven at 80-100℃ until constant weight to obtain activated talc powder.

[0016] Furthermore, the median particle size of the talc powder is 10-13 μm.

[0017] Furthermore, the ratio of the acidified talc powder, 95% aqueous ethanol solution, and γ-aminopropyltriethoxysilane is 30-35g:150mL:0.7-1.0g.

[0018] Furthermore, the modified calcium carbonate is prepared by the following steps:

[0019] Limestone is placed in a muffle furnace and heated to 1100-1150℃ for calcination for 2.5-3.0 hours to obtain calcium oxide. Calcium oxide is then mixed with pure water at a ratio of 1g:5-6mL for 10-15 minutes to obtain lime slurry. A crystal form control agent is added to the lime slurry. After the addition is complete, the lime slurry is passed through a 200-mesh sieve and aged for 24 hours. The aged lime slurry is then transferred to a carbonation reactor and stirred at a constant speed of 300-400r / min. A CO2-air mixture is introduced into the carbonation reactor and stirred at a constant temperature for 2.0-2.5 hours to obtain nano-calcium carbonate slurry. A modifier is then added to the nano-calcium carbonate slurry and stirred at a constant temperature for 2-3 hours. After pressure filtration, drying, and ultra-fine pulverization, modified calcium carbonate is obtained.

[0020] Furthermore, the crystal form control agent is one of glutamic acid and aspartic acid.

[0021] Furthermore, the amount of the crystal form control agent is 0.6%-0.8% of the total mass of lime slurry.

[0022] Furthermore, the CO2 concentration in the CO2-air mixture is 28%-32%.

[0023] Furthermore, the flow rate of the CO2-air mixture is 8-10 m³ / h.3 / h.

[0024] Furthermore, the modifier is composed of lauric acid, palmitic acid, stearic acid, and γ-aminopropyltriethoxysilane in a mass ratio of 3.5-4.0:2.2-2.5:1.2-1.5:0.2-0.3.

[0025] Furthermore, the amount of the modifier used is 2%-4% of the total mass of the nano-calcium carbonate slurry.

[0026] Furthermore, the particle size of the modified calcium carbonate is ≤8μm.

[0027] Furthermore, the compatibilizer is one of maleic anhydride and maleic anhydride-grafted polyethylene.

[0028] Furthermore, the antioxidant is one or more of antioxidant 1076, antioxidant 168, and antioxidant 1010 mixed in any proportion.

[0029] Furthermore, the lubricant is one or more of polyethylene wax, oxidized polyethylene wax, and monoglyceride mixed in any proportion.

[0030] Furthermore, the hexagonal reinforced corrugated pipe is prepared by the following steps:

[0031] Polyvinyl chloride resin, reinforcing filler, compatibilizer, antioxidant, and lubricant are mixed at 110-130℃ for 30-40 minutes at a stirring rate of 900-1100 r / min to obtain a mixture. The mixture is then placed in a twin-screw extruder for plasticizing and extruding. During the plasticizing and extruding process, the temperatures are as follows: feeding section 185-195℃, compression section 180-185℃, melting section 180-185℃, metering section 175-180℃, die section 175-180℃, and orifice section 190-210℃. After plasticizing and extruding, the mixture is cooled, drawn, shaped, and cut to obtain a hexagonal reinforced corrugated pipe.

[0032] The beneficial effects of this invention are:

[0033] This invention discloses a corrugated pipe with hexagonal edges, which helps to improve the mechanical strength and stability of the corrugated pipe. At the same time, the cooperation between the reinforcing ring and the reinforcing rib helps to improve the tensile strength of the corrugated pipe. Finally, by opening grooves in the arc part, this invention helps to increase the contact area between the hexagonal reinforced corrugated pipe and the soil when it is underground, thereby helping to improve the friction and bonding strength of the contact surface between the hexagonal reinforced corrugated pipe and the soil.

[0034] This invention also discloses the raw material composition and preparation method of the above-mentioned hexagonal reinforced corrugated pipe. The hexagonal reinforced corrugated pipe of this invention uses polyvinyl chloride resin as the base material. By adding reinforcing fillers and other additives, the comprehensive performance of the corrugated pipe is improved. The reinforcing fillers are used to improve the mechanical strength of the corrugated pipe (mainly ring stiffness and tensile strength). The reinforcing fillers are composed of nano-calcium carbonate, spherical alumina mixture and activated talc powder with gradient particle size distribution to achieve close packing. By adding less reinforcing filler, the mechanical strength of the hexagonal reinforced corrugated pipe can be significantly improved.

[0035] This invention adds a crystal form control agent during the preparation of nano-calcium carbonate to directionally control the morphology of the nano-calcium carbonate. Among the suitable crystal form control agents, this invention selects acidic amino acid crystal form control agents, specifically glutamic acid or aspartic acid, to directionally select spherical aragonite morphology nano-calcium carbonate. The mixture of spherical aragonite morphology nano-calcium carbonate with spherical alumina and activated talc powder is more likely to achieve close packing, which helps to further improve the mechanical strength of hexagonal reinforced corrugated pipes.

[0036] In the process of preparing activated talc powder, the present invention first acidifies the talc powder with acetic acid solution, and then modifies the surface of the talc powder with γ-aminopropyltriethoxysilane, which helps to improve the dispersion performance of talc powder, and thus helps to improve the mechanical strength of hexagonal reinforced corrugated pipe. Attached Figure Description

[0037] The invention will now be further described with reference to the accompanying drawings.

[0038] Figure 1 This is a front view of a hexagonal reinforced bellows according to the present invention;

[0039] Figure 2 This is a side view of a hexagonal reinforced bellows according to the present invention;

[0040] Figure 3 yes Figure 1 A cross-sectional view of the AA plane;

[0041] Figure 4 yes Figure 2 A cross-sectional view of the BB plane;

[0042] Figure 5 This is a schematic diagram of the structure of a hexagonal reinforced corrugated pipe according to the present invention;

[0043] Figure 6 yes Figure 3 A magnified view of a section at point A in the middle;

[0044] Figure 7 yes Figure 4 A magnified view of a section at point B in the middle;

[0045] Figure 8 yes Figure 5 A magnified view of a section at point C.

[0046] In the diagram: 1. Pipe body; 11. Insertion end; 12. Receiver end; 101. Reinforcing ring; 1011. Rib; 1012. Arc; 10121. Groove; 102. Reinforcing rib. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] Example 1

[0049] Preparation of activated talc:

[0050] Talc powder (median particle size 10-13 μm; purchased from Dalian Particle Ultrafine Powder Co., Ltd.) was soaked in an acetic acid solution with a pH of 4.0 and stirred at room temperature for 30 min. It was then removed and dried in a constant temperature drying oven at 100℃ until constant weight to obtain acidified talc powder. 30 g of acidified talc powder was soaked in 150 mL of 95% ethanol aqueous solution, and 0.7 g of γ-aminopropyltriethoxysilane was added. The temperature was raised to 55℃ and stirred at a constant temperature for 2 h. It was then removed and dried in a constant temperature drying oven at 80℃ until constant weight to obtain activated talc powder.

[0051] Example 2

[0052] Preparation of activated talc:

[0053] Talc powder (median particle size 10-13 μm; purchased from Dalian Particle Ultrafine Powder Co., Ltd.) was soaked in an acetic acid solution with a pH of 4.1 and stirred at room temperature for 30 min. It was then removed and dried in a constant temperature drying oven at 110℃ until constant weight to obtain acidified talc powder. 32 g of acidified talc powder was soaked in 150 mL of 95% ethanol aqueous solution, and 0.8 g of γ-aminopropyltriethoxysilane was added. The temperature was raised to 58℃ and stirred at a constant temperature for 3 h. It was then removed and dried in a constant temperature drying oven at 90℃ until constant weight to obtain activated talc powder.

[0054] Example 3

[0055] Preparation of activated talc:

[0056] Talc powder (median particle size 10-13 μm; purchased from Dalian Particle Ultrafine Powder Co., Ltd.) was soaked in an acetic acid solution with a pH of 4.2 and stirred at room temperature for 30 min. It was then removed and dried in a constant temperature drying oven at 120℃ until constant weight to obtain acidified talc powder. 35 g of acidified talc powder was soaked in 150 mL of 95% ethanol aqueous solution, and 1.0 g of γ-aminopropyltriethoxysilane was added. The temperature was raised to 60℃ and stirred at a constant temperature for 3 h. It was then removed and dried in a constant temperature drying oven at 100℃ until constant weight to obtain activated talc powder.

[0057] Example 4

[0058] Preparation of modified calcium carbonate:

[0059] Limestone (purchased from Longxing Lime Factory, Nanheng Town, Longnan County, Ganzhou City, Jiangxi Province) was placed in a muffle furnace and heated to 1100℃ for calcination for 2.5 hours to obtain calcium oxide. Calcium oxide was then mixed with pure water at a ratio of 1g:5mL for 10 minutes to obtain lime slurry. A crystal form control agent (glutamic acid; BOC-D-glutamic acid; 98%; purchased from Shanghai Yuanye Biotechnology Co., Ltd.) was added to the lime slurry at a concentration of 0.6% of the total mass of lime slurry. After addition, the lime slurry was sieved through a 200-mesh sieve and aged for 24 hours. The aged lime slurry was then transferred to a carbonization reactor and stirred at a constant speed of 300r / min. A CO2-air mixture with a CO2 concentration of 28% was introduced into the carbonization reactor at a flow rate of 8m³ / min. 3 The mixture was stirred at a constant temperature for 2.0 h to carry out the carbonation reaction. After the carbonation reaction was completed, a nano-calcium carbonate slurry was obtained. A modifier (the modifier was a mixture of lauric acid, palmitic acid, stearic acid, and γ-aminopropyltriethoxysilane in a mass ratio of 3.5:2.2:1.2:0.2; lauric acid, palmitic acid, and stearic acid were all purchased from Shanghai Yuanye Biotechnology Co., Ltd.) was added to the nano-calcium carbonate slurry. The mixture was stirred at a constant temperature for 2 h, then filtered, dried, and ultra-finely pulverized to obtain modified calcium carbonate with a particle size ≤8μm.

[0060] Example 5

[0061] Preparation of modified calcium carbonate:

[0062] Limestone (purchased from Longxing Lime Factory, Nanheng Town, Longnan County, Ganzhou City, Jiangxi Province) was placed in a muffle furnace and heated to 1140℃ for calcination for 3.0 h to obtain calcium oxide. Calcium oxide was then mixed with pure water at a ratio of 1 g: 5.5 mL for 12 min to obtain lime slurry. A crystal form control agent (aspartic acid; 98%; purchased from Shanghai Yuanye Biotechnology Co., Ltd.) was added to the lime slurry at a concentration of 0.7% of the total mass of lime slurry. After addition, the lime slurry was passed through a 200-mesh sieve and aged for 24 h. The aged lime slurry was then transferred to a carbonization reactor and stirred at a constant speed of 350 r / min. A CO2-air mixture with a CO2 concentration of 30% was introduced into the carbonization reactor at a flow rate of 9 m³ / min. 3 The mixture was stirred at a constant temperature for 2.5 hours to carry out the carbonation reaction. After the carbonation reaction was completed, a nano-calcium carbonate slurry was obtained. A modifier (the modifier was a mixture of lauric acid, palmitic acid, stearic acid, and γ-aminopropyltriethoxysilane in a mass ratio of 3.7:2.4:1.4:0.3; lauric acid, palmitic acid, and stearic acid were all purchased from Shanghai Yuanye Biotechnology Co., Ltd.) was added to the nano-calcium carbonate slurry at a mass of 3%. The mixture was stirred at a constant temperature for 3 hours, then filtered, dried, and ultra-finely pulverized to obtain modified calcium carbonate with a particle size ≤8μm.

[0063] Example 6

[0064] Preparation of modified calcium carbonate:

[0065] Limestone (purchased from Longxing Lime Factory, Nanheng Town, Longnan County, Ganzhou City, Jiangxi Province) was placed in a muffle furnace and heated to 1150℃ for calcination for 3.0 h to obtain calcium oxide. Calcium oxide was then mixed with pure water at a ratio of 1 g: 6 mL for 15 min to obtain lime slurry. A crystal form control agent (aspartic acid; 98%; purchased from Shanghai Yuanye Biotechnology Co., Ltd.) was added to the lime slurry at a concentration of 0.8% of the total mass of lime slurry. After addition, the lime slurry was passed through a 200-mesh sieve and aged for 24 h. The aged lime slurry was then transferred to a carbonization reactor and stirred at a constant speed of 400 r / min. A CO2-air mixture with a CO2 concentration of 32% was introduced into the carbonization reactor at a flow rate of 10 m³ / min. 3 The mixture was stirred at a constant temperature for 2.5 hours to carry out the carbonation reaction. After the carbonation reaction was completed, a nano-calcium carbonate slurry was obtained. A modifier (the modifier was a mixture of lauric acid, palmitic acid, stearic acid, and γ-aminopropyltriethoxysilane in a mass ratio of 4.0:2.5:1.5:0.3; lauric acid, palmitic acid, and stearic acid were all purchased from Shanghai Yuanye Biotechnology Co., Ltd.) was added to the nano-calcium carbonate slurry at a mass of 4%. The mixture was stirred at a constant temperature for 3 hours, then filtered, dried, and ultra-finely pulverized to obtain modified calcium carbonate with a particle size ≤8μm.

[0066] Example 7

[0067] Preparation of hexagonal reinforced corrugated pipe:

[0068] First, the hexagonal reinforced corrugated pipe is composed of the following raw materials in parts by weight:

[0069]

[0070] The reinforcing filler is a mixture of spherical alumina mixture, activated talc powder prepared in Example 1, and modified calcium carbonate prepared in Example 4, in a weight ratio of 35:22:15.

[0071] The spherical alumina mixture is composed of spherical alumina with a median particle size of 65-75 μm and spherical alumina with a median particle size of 25-30 μm at a mass ratio of 55:12. The spherical alumina was purchased from Hunan Jiutai Metallurgical Technology Co., Ltd.

[0072] The compatibilizer is maleic anhydride, which was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.

[0073] The antioxidant is composed of antioxidant 1076 and antioxidant 168 mixed in a mass ratio of 2:1.

[0074] The lubricant is polyethylene wax, which was purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0075] Then, specifically, the above-mentioned hexagonal reinforced bellows is prepared by the following steps:

[0076] Polyvinyl chloride resin, reinforcing filler, compatibilizer, antioxidant, and lubricant are mixed at 110°C for 30 minutes at a stirring rate of 900 r / min to obtain a mixture. The mixture is then placed in a twin-screw extruder for plasticizing and extruding. During the plasticizing and extruding process, the following temperatures are observed: feeding section temperature 185-190°C, compression section temperature 180-182°C, melting section temperature 180-183°C, metering section temperature 175-178°C, die section temperature 175-178°C, and orifice section temperature 190-200°C. After plasticizing and extruding, the mixture is cooled, drawn, shaped, and cut to obtain a hexagonal reinforced corrugated pipe.

[0077] Example 8

[0078] Preparation of hexagonal reinforced corrugated pipe:

[0079] First, the hexagonal reinforced corrugated pipe is composed of the following raw materials in parts by weight:

[0080]

[0081] The reinforcing filler is a mixture of spherical alumina mixture, activated talc powder prepared in Example 2, and modified calcium carbonate prepared in Example 5, in a weight ratio of 41:24:16.

[0082] The spherical alumina mixture is composed of spherical alumina with a median particle size of 65-75μm and spherical alumina with a median particle size of 25-30μm at a mass ratio of 70:13. The spherical alumina was purchased from Hunan Jiutai Metallurgical Technology Co., Ltd.

[0083] The compatibilizer is maleic anhydride-grafted polyethylene, which was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.

[0084] The antioxidant is composed of antioxidant 1076, antioxidant 168 and antioxidant 1010 mixed in a mass ratio of 5:2:1.

[0085] The lubricant is a mixture of polyethylene wax, oxidized polyethylene wax, and monoglyceride in a mass ratio of 12:7:4. The polyethylene wax, oxidized polyethylene wax, and monoglyceride were all purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0086] Then, specifically, the above-mentioned hexagonal reinforced bellows is prepared by the following steps:

[0087] Polyvinyl chloride resin, reinforcing filler, compatibilizer, antioxidant, and lubricant were mixed at 120°C for 40 minutes at a stirring rate of 1000 r / min to obtain a mixture. The mixture was then placed in a twin-screw extruder for plasticizing and extruding. During the plasticizing and extruding process, the following temperatures were observed: feeding section temperature 187-190°C, compression section temperature 180-184°C, melting section temperature 180-184°C, metering section temperature 178-180°C, die section temperature 178-180°C, and orifice section temperature 200-205°C. After plasticizing and extruding, the mixture was cooled, drawn, shaped, and cut to obtain a hexagonal reinforced corrugated pipe.

[0088] Example 9

[0089] Preparation of hexagonal reinforced corrugated pipe:

[0090] First, the hexagonal reinforced corrugated pipe is composed of the following raw materials in parts by weight:

[0091]

[0092] The reinforcing filler is a mixture of spherical alumina mixture, activated talc powder prepared in Example 3, and modified calcium carbonate prepared in Example 6, in a weight ratio of 45:25:17.

[0093] The spherical alumina mixture is composed of spherical alumina with a median particle size of 65-75 μm and spherical alumina with a median particle size of 25-30 μm at a mass ratio of 75:14. The spherical alumina was purchased from Hunan Jiutai Metallurgical Technology Co., Ltd.

[0094] The compatibilizer is maleic anhydride-grafted polyethylene, which was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.

[0095] Among them, the antioxidant is antioxidant 1010.

[0096] The lubricant is oxidized polyethylene wax, which was purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0097] Then, specifically, the above-mentioned hexagonal reinforced bellows is prepared by the following steps:

[0098] Polyvinyl chloride resin, reinforcing filler, compatibilizer, antioxidant, and lubricant are mixed at 110-130℃ for 40 minutes at a stirring rate of 1100 r / min to obtain a mixture. The mixture is then placed in a twin-screw extruder for plasticizing and extruding. During the plasticizing and extruding process, the following temperatures are maintained: feeding section temperature 190-195℃, compression section temperature 181-185℃, melting section temperature 181-185℃, metering section temperature 176-180℃, die section temperature 176-180℃, and orifice section temperature 200-210℃. After plasticizing and extruding, the mixture is cooled, drawn, shaped, and cut to obtain a hexagonal reinforced corrugated pipe.

[0099] Example 10

[0100] A hexagonal reinforced corrugated pipe:

[0101] The hexagonal reinforced corrugated pipe was prepared according to the preparation method in Example 8. Please refer to [link to example]. Figures 1-8As shown, the prepared hexagonal reinforced corrugated pipe includes a pipe body 1, one end of which is a plug-in end 11, and the other end of which is a receiving end 12. The plug-in end 11 and the receiving end 12 of the hexagonal reinforced corrugated pipe at both ends cooperate with each other. A ring of equally spaced reinforcing rings 101 is provided in the middle of the outer side of the pipe body 1. A reinforcing rib 102 is provided in the middle of the outer side of the pipe body 1 between adjacent reinforcing rings 101. The height of the reinforcing rib 102 is less than the height of the reinforcing ring 101. The reinforcing ring 101 includes twelve sides, of which the six alternate sides are the edges of the reinforcing ring 101. 1011, the edge 1011 is planar, and six sets of edge 1011 form the hexagon of the corrugated pipe. The hexagonal corrugated pipe helps to improve the mechanical strength and stability of the corrugated pipe. The edge between adjacent edge 1011 is the arc 1012 of the strong ring. The arc 1012 is arc-shaped. The arc 1012 has a groove 10121 that penetrates the arc 1012 along the radial direction of the corrugated pipe. The groove 10121 helps to increase the contact area between the hexagonal reinforced corrugated pipe and the soil when it is underground, thereby helping to improve the friction and bonding strength of the contact surface between the hexagonal reinforced corrugated pipe and the soil.

[0102] Comparative Example 1

[0103] Comparative Example 1 served as the control group for Example 10. γ-aminopropyltriethoxysilane was removed during the preparation of activated talc powder in Example 2 of Example 8 of Comparative Example 10, while the remaining raw materials, preparation methods, and related structures remained unchanged. Activated talc powder was prepared according to Example 2, and a hexagonal reinforced corrugated pipe was finally obtained by referring to the preparation method of Example 8 and the structure of Example 10.

[0104] Comparative Example 2

[0105] Comparative Example 2 served as the control group for Example 10. The activated talc powder prepared in Example 2 of Example 8 of Comparative Example 10 was replaced with talc powder (median particle size of 10-13 μm; purchased from Dalian Particle Ultrafine Powder Co., Ltd.). The other raw materials, preparation methods and related structures remained unchanged. Referring to the preparation method of Example 8 and the structure of Example 10, a hexagonal reinforced corrugated pipe was finally obtained.

[0106] Comparative Example 3

[0107] Comparative Example 3 served as the control group for Example 10. The activated talc powder prepared in Example 2 of Example 8 of Comparative Example 10 was removed, while the remaining raw materials, preparation methods, and related structures remained unchanged. Referring to the preparation method of Example 8 and the structure of Example 10, a hexagonal reinforced corrugated pipe was finally obtained.

[0108] Comparative Example 4

[0109] Comparative Example 4 served as the control group for Example 10. The modified calcium carbonate prepared in Example 5 of Example 8 of Comparative Example 10 was removed, while the remaining raw materials, preparation methods, and related structures remained unchanged. Referring to the preparation method of Example 8 and the structure of Example 10, a hexagonal reinforced corrugated pipe was finally obtained.

[0110] Comparative Example 5

[0111] Comparative Example 5 served as the control group for Example 10. The spherical alumina mixture in Example 8 of Comparative Example 10 was replaced with spherical alumina with a median particle size of 65-75 μm. The other raw materials, preparation methods, and related structures remained unchanged. Referring to the preparation method of Example 8 and the structure of Example 10, a hexagonal reinforced corrugated pipe was finally obtained.

[0112] Comparative Example 6

[0113] Comparative Example 6 served as the control group for Example 10. The spherical alumina mixture in Example 8 of Comparative Example 10 was replaced with spherical alumina with a median particle size of 25-30 μm. The other raw materials, preparation methods, and related structures remained unchanged. Referring to the preparation method of Example 8 and the structure of Example 10, a hexagonal reinforced corrugated pipe was finally obtained.

[0114] Comparative Example 7

[0115] Comparative Example 7 served as the control group for Example 10. The spherical alumina in Example 8 of Comparative Example 10 was removed, while the remaining raw materials, preparation methods, and related structures remained unchanged. Referring to the preparation method of Example 8 and the structure of Example 10, a hexagonal reinforced corrugated pipe was finally obtained.

[0116] Comparative Example 8

[0117] Comparative Example 8 serves as the control group for Example 10. The reinforcing filler in Example 8 of Comparative Example 10 was removed, while the remaining raw materials, preparation methods, and related structures remained unchanged. Referring to the preparation method of Example 8 and the structure of Example 10, a hexagonal reinforced corrugated pipe was finally obtained.

[0118] Comparative Example 9

[0119] Comparative Example 9 serves as the control group for Example 10. The structure of the reinforcing ring 101 in Comparative Example 10 is replaced with the reinforcing rib 102, while the other raw materials, preparation methods, and related structures remain unchanged. Referring to the preparation method of Example 8 and the structure of Example 10, a hexagonal reinforced corrugated pipe is finally obtained.

[0120] The performance of the hexagonal reinforced corrugated pipes prepared in Example 10 and Comparative Examples 1-9 was tested. The test process is as follows, and the test results are shown in Table 1.

[0121] Ring stiffness: Tested according to the experimental methods in GB / T9647-2015;

[0122] Tensile strength: Tested according to the test method in GB / T8804.2-2003.

[0123] Table 1

[0124] Example 10 15.9 47.8 Comparative Example 1 14.8 46.4 Comparative Example 2 14.5 45.8 Comparative Example 3 14.0 45.1 Comparative Example 4 12.5 41.4 Comparative Example 5 13.0 43.0 Comparative Example 6 12.8 42.1 Comparative Example 7 13.3 43.7 Comparative Example 8 10.5 37.0 Comparative Example 9 11.2 38.3

[0125] As can be seen from Table 1, the present invention improves both the reinforcing filler and the corrugated pipe in the hexagonal reinforced corrugated pipe material, thereby comprehensively enhancing the ring stiffness and tensile strength of the corrugated pipe.

[0126] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0127] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hexagonal reinforced corrugated pipe, characterized in that, The process includes the following steps: a pipe body (1), one end of which is a plug end (11) and the other end of which is a receiving end (12). The plug end (11) and the receiving end (12) cooperate with each other. A reinforcing ring (101) is provided in the middle of the outer side of the pipe body (1). A reinforcing rib (102) is provided between adjacent reinforcing rings (101) in the middle of the outer side of the pipe body (1). The reinforcing ring (101) includes twelve sides, of which six alternating sides are the edges (1011) of the reinforcing ring (1011). The edges (1011) are planar. The six sets of edges (1011) constitute the hexagon of the corrugated pipe. The side between adjacent edges (1011) is the arc part (1012) of the reinforcing ring. The arc part (1012) is arc-shaped. Composed of the following raw materials in parts by weight: 85-110 parts of polyvinyl chloride resin; 20-30 parts of reinforcing filler; 4-8 parts compatibilizer; Antioxidant 2-5 parts; 2-5 parts lubricant; The reinforcing filler is a mixture of spherical alumina, activated talc, and modified calcium carbonate in a weight ratio of 35-45:22-25:15-17. Modified calcium carbonate is prepared by the following steps: Limestone is placed in a muffle furnace and heated to 1100-1150℃ for calcination for 2.5-3.0 hours to obtain calcium oxide. Calcium oxide is mixed with pure water at a ratio of 1g:5-6mL for 10-15 minutes to obtain lime slurry. A crystal form control agent is added to the lime slurry. After the addition is complete, the lime slurry is passed through a 200-mesh sieve and aged for 24 hours. The aged lime slurry is transferred to a carbonation reactor and stirred at a constant speed of 300-400r / min. A CO2-air mixture is introduced into the carbonation reactor and stirred at a constant temperature for 2.0-2.5 hours to obtain nano-calcium carbonate slurry. A modifier is added to the nano-calcium carbonate slurry and stirred at a constant temperature for 2-3 hours. After pressure filtration, drying, and ultra-fine pulverization, modified calcium carbonate is obtained. The crystal form control agent is one of glutamic acid and aspartic acid; The amount of the crystal form control agent is 0.6%-0.8% of the total mass of lime slurry; The CO2 concentration in the CO2-air mixture is 28%-32%; The flow rate of the CO2-air mixture is 8-10 m³ / h. 3 / h; The modifier is a mixture of lauric acid, palmitic acid, stearic acid, and γ-aminopropyltriethoxysilane in a mass ratio of 3.5-4.0:2.2-2.5:1.2-1.5:0.2-0.

3. The amount of the modifier used is 2%-4% of the total mass of the nano-calcium carbonate slurry; The particle size of the modified calcium carbonate is ≤8μm; The spherical alumina mixture is composed of spherical alumina with a median particle size of 65-75 μm and spherical alumina with a median particle size of 25-30 μm in a mass ratio of 55-75:12-14. The activated talc powder is prepared by the following steps: Talc powder is soaked in an acetic acid solution with a pH of 4.0-4.2 and stirred at room temperature for 30 minutes. It is then removed and dried in a constant temperature drying oven at 100-120℃ until constant weight to obtain acidified talc powder. The acidified talc powder is then soaked in a 95% ethanol aqueous solution, and γ-aminopropyltriethoxysilane is added. The temperature is raised to 55-60℃ and stirred at a constant temperature for 2-3 hours. It is then removed and dried in a constant temperature drying oven at 80-100℃ until constant weight to obtain activated talc powder. The median particle size of the talc powder is 10-13 μm; The ratio of acidified talc, 95% ethanol aqueous solution, and γ-aminopropyltriethoxysilane is 30-35g:150mL:0.7-1.0g.

2. The hexagonal reinforced corrugated pipe according to claim 1, characterized in that, The reinforcing rings (101) are distributed in a ring at equal intervals.

3. A hexagonal reinforced corrugated pipe according to claim 1, characterized in that, The height of the reinforcing rib (102) is less than the height of the reinforcing ring (101).

4. A hexagonal reinforced corrugated pipe according to claim 1, characterized in that, The arc portion (1012) has a groove (10121) that penetrates the arc portion (1012) along the radial direction of the bellows.

5. A hexagonal reinforced corrugated pipe according to claim 1, characterized in that, The compatibilizer is one of maleic anhydride and maleic anhydride-grafted polyethylene. The antioxidant is one or more of antioxidant 1076, antioxidant 168, and antioxidant 1010 mixed in any proportion; The lubricant is one or more of polyethylene wax, oxidized polyethylene wax, and monoglyceride, mixed in any proportion.

6. A hexagonal reinforced corrugated pipe according to claim 1, characterized in that, The hexagonal reinforced bellows is prepared by the following steps: Polyvinyl chloride resin, reinforcing filler, compatibilizer, antioxidant, and lubricant are mixed at 110-130℃ for 30-40 minutes at a stirring rate of 900-1100 r / min to obtain a mixture. The mixture is then placed in a twin-screw extruder for plasticizing and extruding. During the plasticizing and extruding process, the temperatures are as follows: feeding section 185-195℃, compression section 180-185℃, melting section 180-185℃, metering section 175-180℃, die section 175-180℃, and orifice section 190-210℃. After plasticizing and extruding, the mixture is cooled, drawn, shaped, and cut to obtain a hexagonal reinforced corrugated pipe.

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