阅读说明：本技术 高弯折强度抗性的mpve双壁波纹管的制备方法及检测设备 (Preparation method and detection equipment of MPVE double-wall corrugated pipe with high bending strength resistance ) 是由 沈庆山 于 2019-10-08 设计创作，主要内容包括：本发明公开了高弯折强度抗性的MPVE双壁波纹管的制备方法及检测设备,包括如下步骤,步骤S1、配比确定；步骤S2、称量混合原料；步骤S3、上料；步骤S4、挤出；步骤S5、成型；步骤S6、切割包装；步骤S7、随机抽样检测；本发明的有益效果是,按照本案中的配比结构强度高,对比普通配比,内壁管配比中增加固定添加剂的用量,增加一定强度,而且不会出现破损情况,具有较好的高弯折强度,比较适应高度差较大的地域使用,该具有高弯折强度抗性的MPVE双壁波纹管的检测设备,结构简单,使用方便,通过其上的推进检测机构可以有效检测出在实验管形变时的压力,并且能够检测不同形变程度的压力。(The invention discloses a preparation method and detection equipment of an MPVE double-wall corrugated pipe with high bending strength resistance, comprising the following steps of S1, and determining the proportion; step S2, weighing the mixed raw materials; step S3, feeding; step S4, extruding; step S5, molding; step S6, cutting and packaging; step S7, random sampling detection; the detection equipment for the MPVE double-wall corrugated pipe with high bending strength resistance has the advantages that the structural strength is high according to the matching scheme, compared with the common matching scheme, the using amount of the fixed additive is increased in the matching of the inner wall pipe, certain strength is increased, the damage condition is avoided, the detection equipment has good high bending strength, and is suitable for being used in regions with large height difference.)

1. The preparation method of the MPVE double-wall corrugated pipe with high bending strength resistance is characterized by comprising the following steps of S1, and proportioning determination; step S2, weighing the mixed raw materials; step S3, feeding; step S4, extruding; step S5, molding; step S6, cutting and packaging; step S7, random sampling detection;

s1: the weight fraction is taken as a unit, and the mixture ratio of various raw materials is as follows:

the inner wall pipe comprises the following raw materials in proportion: 50-55 parts of polypropylene resin, 5-10 parts of reclaimed materials, 23-26 parts of fixed fillers, 4-5 parts of stearic acid, 3-7 parts of drying agents and 4-5 parts of dark green color master batch;

the outer wall pipe comprises the following raw materials in proportion: 50-55 parts of polypropylene resin, 5-8 parts of reclaimed materials, 25-28 parts of fixed fillers, 4-6 parts of stearic acid, 3-6 parts of drying agents and 3-7 parts of dark green color master batches;

s2: weighing the raw materials according to the ratio of the inner wall pipe raw material to the outer wall pipe raw material determined in the step S1, and respectively putting the raw materials into a double mixer for mixing, wherein the raw materials are divided into an inner material and an outer material;

s3: forcibly feeding materials into the feeding machines regularly and quantitatively by vacuum feeding, wherein the rotating speed of the feeding machines is set to be 22-28 r/min, the two feeding machines are used for continuous feeding, and the set weight is 150-;

s4: putting the mixed materials into a double-cone double-screw extruder, wherein the rotating speed control range is as follows: the outer wall pipe is 27-32 r/min, the inner wall pipe is 18-24 r/min, the melt mixed material is extruded through an extrusion die at 205-215 ℃ and 19MPa melt pressure, the extrusion die is divided into an inner opening die and an outer opening die, the inner opening die and the outer opening die are provided with adjusting screws, and the wall thickness is adjusted according to requirements;

s5: controlling and shaping traction on the extruded and molded tube blank on a molding machine in a segmented manner, and simultaneously carrying out a flaring molding process, wherein the flaring starting length is 90-120mm, the flaring ending length is 320-350mm, the molding machine is provided with at least eight segments of molding processes, the setting range of the molding speed is 500-6000mm, the speed range is 85-110M/s, and the periphery of the molding machine is provided with a cooling fan;

s6: cutting the double-wall corrugated pipe by a cutting machine, and packaging in batches;

s7: and randomly drawing the corrugated pipe for bending detection.

2. The method for preparing an MPVE double-wall corrugated pipe with high bending strength resistance according to claim 1, wherein in step S1, the raw material ratio is as follows:

the inner wall pipe comprises the following raw materials in proportion: polypropylene resin 52, a reclaimed material 7, a fixed filler 24, stearic acid 6, a drying agent 7 and blackish green color master batch 4; (ii) a

The outer wall pipe comprises the following raw materials in proportion: the coating comprises 53 parts of polypropylene resin, 8 parts of reclaimed materials, 28 parts of fixed fillers, 4 parts of stearic acid, 3 parts of drying agents and 4 parts of dark green color master batches.

3. The method for preparing MPVE double-wall corrugated pipe with high bending strength resistance as claimed in claim 1, wherein the rotation speed of the feeding machine is controlled between 23-25 rpm, and the weight of the feeding material is set to 180 kg/h.

4. The method for preparing MPVE double wall corrugated pipe with high bending strength resistance according to claim 1, wherein in step S4, the rotation speed of a double-cone twin-screw extruder is controlled: the rotating speed of the outer wall pipe is 28-30 r/min, and the rotating speed of the inner pipe is 19-21 r/min.

5. The method as claimed in claim 1, wherein in step S5, the flaring start length is controlled to be between 100 and 110mm, and the flaring end length is controlled to be between 330 and 335 mm.

6. The preparation method and the detection equipment of the MPVE double-wall corrugated pipe with high bending strength resistance mainly comprise a fixing plate (1), a pair of end fixing structures with the same structure and a pair of adjusting structures with the same structure, and are characterized in that the pair of adjusting structures are arranged at two ends of the fixing plate (1), the pair of end fixing structures are arranged on the adjusting structures, and one side of the middle end of the fixing plate (1) is provided with a propulsion detection mechanism;

the propulsion detection mechanism includes: a contact propulsion structure and a pressure detection structure;

the contact advancing structure includes: the device comprises a pair of sliders (2) with the same structure, a connecting plate (3), a pair of guide rods (4) with the same structure, a sleeve (5), an inserted rod (6), a connecting block (7) and a hydraulic cylinder (8);

a pair of sliding grooves with the same structure are formed in two sides of the center line of the fixing plate (1), the pair of sliding blocks (2) are assembled in the pair of sliding grooves, the connecting plate (3) is installed between the pair of sliding blocks (2), a pair of through holes with the same structure are formed in the pair of sliding blocks (2), the pair of guide rods (4) are assembled in the pair of through holes, the sleeve (5) is installed on the fixing plate (1) and located on one side of the connecting plate (3), the inserting rod (6) is installed in the sleeve (5), one end of the inserting rod is connected with the connecting plate (3) through a connecting block (7), and the hydraulic cylinder (8) is installed on the fixing plate (1) and the telescopic end of the hydraulic cylinder is connected with the other end of the inserting rod;

the pressure detection structure includes: a pair of contact plates (9) with the same structure, a support plate (10), a pair of mounting columns (11) with the same structure, a pair of springs (12) with the same structure, a pair of sleeves (13) with the same structure and a pair of pressure sensors (14) with the same structure;

the connecting plate (3) is provided with a pair of grooves with the same structure, the pair of contact plates (9) are arranged in the pair of grooves and can slide along the grooves, the supporting plate (10) is arranged on the connecting plate (3), the pair of mounting columns (11) are horizontally and vertically arranged on the pair of contact plates (9), and the pair of sleeves (13) are arranged on the supporting plate (10). The pair of pressure sensors (14) are embedded in the pair of sleeves (5), the pair of springs (12) are sleeved on the pair of mounting columns (11) and the end parts of the springs are in contact with the pair of pressure sensors (14), and two pairs of limiting components with the same structure are arranged on the supporting plate (10) and positioned on two sides of the pair of contact plates (9);

the spacing subassembly includes: a pair of limit grooves (15) with the same structure and a pair of insertion blocks (16) with the same structure;

a pair of limiting grooves (15) with the same structure are symmetrically formed in the two side wall surfaces of the contact plate (9), a pair of insertion blocks (16) matched with the support plate (10) are mounted on the support plate (10), and the insertion blocks (16) are inserted into the limiting grooves (15).

7. The method for preparing and testing an MPVE double-wall corrugated pipe with high bending strength resistance as claimed in claim 6, wherein the adjusting structure comprises: the device comprises a fixed seat (17), a screw rod (18), a pair of sliding blocks (19) with the same structure, an adjusting plate (20), two pairs of connecting rods (21) with the same structure, a supporting seat (22) and an indicating needle (23);

fixing base (17) are installed in fixed plate (1) one end, have seted up the sliding tray on fixing base (17), lead screw (18) movable mounting is on fixing base (17), and is a pair of set up a pair of reverse screw hole in sliding block (19) and with lead screw (18) threaded connection, accommodate motor drive end and lead screw (18) tip swing joint, install in fixing base (17) top regulating plate (20), two pairs connecting rod (21) movable mounting is a pair of on sliding block (19) and regulating plate (20), supporting seat (22) install in the scale is installed in one side, and the scale tip has pointer (23).

8. The method for preparing and testing an MPVE double-wall corrugated pipe with high bending strength resistance as claimed in claim 6, wherein the end fixing structure comprises: the device comprises a lower pressure plate (24), an upper pressure plate (25), a pair of adjusting bolts (26) with the same structure and a pair of adjusting blocks (27) with the same structure;

the lower pressing plate (24) is installed on the adjusting plate (20), the upper pressing plate (25) is installed above the lower pressing plate (24), a pair of arc-shaped grooves with the same structure are symmetrically formed in the center positions of the upper pressing plate and the lower pressing plate, a pair of adjusting bolts (26) are movably installed on the lower pressing plate (24), a pair of threaded holes with the same structure are formed in the two sides of the upper pressing plate (25) matched with the lower pressing plate, the adjusting bolts (26) are connected in a pair of threaded holes in a threaded mode, and the adjusting blocks (27) are installed at the end portions of the adjusting bolts (26).

9. The method for preparing MPVE double-wall corrugated pipe with high bending strength resistance and the detection device according to claim 6, wherein the outer sides of a pair of contact plates (9) are both of inner arc structures, and the middle points of the inner arcs are provided with rubber pads (28).

10. The method for preparing and testing an MPVE double wall corrugated tube with high bending strength resistance as claimed in claim 9, wherein the pointer (23) is aligned with the center point of the inner arc of the contact plate (9).

Technical Field

The invention relates to the technical field of corrugated pipe production and detection, in particular to a preparation method and detection equipment of an MPVE double-wall corrugated pipe with high bending strength resistance.

Background

The corrugated pipe is a tubular elastic sensitive element which is formed by connecting foldable corrugated sheets along the folding and stretching direction. The corrugated pipe has wide application in instruments and meters, and is mainly used as a measuring element of a pressure measuring instrument to convert pressure into displacement or force. The corrugated pipe has thin pipe wall and high sensitivity, and the measurement range is from tens of Pa to tens of MPa. The bellows has each characteristic and performance that the ratio of each raw materials has decided the bellows in the production process, the bellows is laying the in-process, can meet the great condition of difference in height change often, and current bellows its bending strength is lower, can't adapt to the bending of this kind of intensity under this condition, buckle easily, and the cracked condition appears easily in the inner wall, make its present bending that produces the crack simultaneously detect through engineering machine, detect outdoors, fix the left and right both ends of test tube through two cars, buckle its middle section through a side view car, and this kind of mode is extravagant manpower and material resources more, waste resource, and the operation is complicated, and observe inconvenient not directly perceived, in view of this, to the problem deep research, the present case produces.

Disclosure of Invention

The invention aims to solve the problems, designs a preparation method and detection equipment of an MPVE double-wall corrugated pipe with high bending strength resistance, and solves the problems that the existing corrugated pipe is low in bending strength, cannot adapt to bending with the strength under the condition, is easy to bend, and is easy to crack on the inner wall, so that cracks are generated, meanwhile, the existing bending detection is mostly carried out outdoors through engineering machinery, the left end and the right end of the test pipe are fixed through two vehicles, and the middle section of the test pipe is bent through a side-view vehicle, so that manpower, material resources and resources are wasted, the operation is complex, and the observation is inconvenient and not intuitive.

The technical scheme of the invention for realizing the aim is as follows: the preparation method of the MPVE double-wall corrugated pipe with high bending strength resistance comprises the following steps of S1, and proportioning determination; step S2, weighing the mixed raw materials; step S3, feeding; step S4, extruding; step S5, molding; step S6, cutting and packaging; step S7, random sampling detection;

s1: the weight fraction is taken as a unit, and the mixture ratio of various raw materials is as follows:

the inner wall pipe comprises the following raw materials in proportion: 50-55 parts of polypropylene resin, 5-10 parts of reclaimed materials, 23-26 parts of fixed fillers, 4-5 parts of stearic acid, 3-7 parts of drying agents and 4-5 parts of dark green color master batch;

the outer wall pipe comprises the following raw materials in proportion: 50-55 parts of polypropylene resin, 5-8 parts of reclaimed materials, 25-28 parts of fixed fillers, 4-6 parts of stearic acid, 3-6 parts of drying agents and 3-7 parts of dark green color master batches;

s2: weighing the raw materials according to the ratio of the inner wall pipe raw material to the outer wall pipe raw material determined in the step S1, and respectively putting the raw materials into a double mixer for mixing, wherein the raw materials are divided into an inner material and an outer material;

s3: forcibly feeding materials into the feeding machines regularly and quantitatively by vacuum feeding, wherein the rotating speed of the feeding machines is set to be 22-28 r/min, the two feeding machines are used for continuous feeding, and the set weight is 150-;

s4: putting the mixed materials into a double-cone double-screw extruder, wherein the rotating speed control range is as follows: the outer wall pipe is 27-32 r/min, the inner wall pipe is 18-24 r/min, the melt mixed material is extruded through an extrusion die at 205-215 ℃ and 19MPa melt pressure, the extrusion die is divided into an inner opening die and an outer opening die, the inner opening die and the outer opening die are provided with adjusting screws, and the wall thickness is adjusted according to requirements;

s5: controlling and shaping traction on the extruded and molded tube blank on a molding machine in a segmented manner, and simultaneously carrying out a flaring molding process, wherein the flaring starting length is 90-120mm, the flaring ending length is 320-350mm, the molding machine is provided with at least eight segments of molding processes, the setting range of the molding speed is 500-6000mm, the speed range is 85-110M/s, and the periphery of the molding machine is provided with a cooling fan;

s6: cutting the double-wall corrugated pipe by a cutting machine, and packaging in batches;

s7: and randomly drawing the corrugated pipe for bending detection.

In the step S1, the mixture ratio of the raw materials is as follows:

the inner wall pipe comprises the following raw materials in proportion: polypropylene resin 52, a reclaimed material 7, a fixed filler 24, stearic acid 6, a drying agent 7 and blackish green color master batch 4; (ii) a

The outer wall pipe comprises the following raw materials in proportion: the coating comprises 53 parts of polypropylene resin, 8 parts of reclaimed materials, 28 parts of fixed fillers, 4 parts of stearic acid, 3 parts of drying agents and 4 parts of dark green color master batches.

The rotating speed of the feeding machine is controlled to be 23-25 r/min, and the set weight of the feeding machine is 180 kg/h.

In step S4, the rotation speed of the double-cone twin-screw extruder is controlled: the rotating speed of the outer wall pipe is 28-30 r/min, and the rotating speed of the inner pipe is 19-21 r/min.

In step S5, the flaring start length is controlled to be between 100 and 110mm, and the flaring end length is controlled to be between 330 and 335 mm.

The preparation method and the detection equipment of the MPVE double-wall corrugated pipe with high bending strength resistance mainly comprise a fixed plate, a pair of end part fixing structures with the same structure and a pair of adjusting structures with the same structure, wherein the pair of adjusting structures are arranged at two ends of the fixed plate, the pair of end part fixing structures are arranged on the adjusting structures, and one side of the middle end of the fixed plate is provided with a propulsion detection mechanism;

the propulsion detection mechanism includes: a contact propulsion structure and a pressure detection structure;

the contact advancing structure includes: the device comprises a pair of sliding blocks with the same structure, a connecting plate, a pair of guide rods with the same structure, a sleeve, an inserting rod, a connecting block and a hydraulic cylinder;

the two sides of the center line of the fixed plate are provided with a pair of chutes with the same structure, a pair of sliding blocks are assembled in the pair of chutes, the connecting plate is arranged between the pair of sliding blocks, the pair of sliding blocks are provided with a pair of through holes with the same structure, the pair of guide rods are assembled in the pair of through holes, the sleeve is arranged on the fixed plate and positioned at one side of the connecting plate, the inserted link is arranged in the sleeve, one end of the inserted link is connected with the connecting plate through a connecting block, and the hydraulic cylinder is arranged on the fixed plate and the telescopic end of the hydraulic cylinder is connected;

the pressure detection structure includes: the device comprises a pair of contact plates with the same structure, a support plate, a pair of mounting columns with the same structure, a pair of springs with the same structure, a pair of sleeves with the same structure and a pair of pressure sensors with the same structure;

the connecting plate is provided with a pair of grooves with the same structure, the pair of contact plates are arranged in the pair of grooves and can slide along the grooves, the supporting plate is arranged on the connecting plate, the pair of mounting columns are horizontally and vertically arranged on the pair of contact plates, and the pair of sleeves are arranged on the supporting plate. The pair of pressure sensors are embedded in the pair of sleeves, the pair of springs are sleeved on the pair of mounting columns, the end parts of the springs are in contact with the pair of pressure sensors, and two pairs of limiting components with the same structure are arranged on the supporting plate and positioned on two sides of the pair of contact plates;

the spacing subassembly includes: a pair of limit grooves with the same structure and a pair of insertion blocks with the same structure;

a pair of limiting grooves with the same structure is symmetrically formed in the two side wall surfaces of the contact plate, a pair of insertion blocks matched with the supporting plates are mounted on the supporting plates, and the insertion blocks are inserted into the limiting grooves.

The adjustment structure includes: the device comprises a fixed seat, a screw rod, a pair of sliding blocks with the same structure, an adjusting plate, two pairs of connecting rods with the same structure, a supporting seat and an indicating needle;

the fixing base is installed in fixed plate one end, has seted up the sliding tray on the fixing base, lead screw movable mounting is on the fixing base, and is a pair of the reverse screw hole of having seted up in the sliding block and with lead screw threaded connection, accommodate motor drive end and lead screw tip swing joint, the regulating plate is installed in the fixing base top, two pairs connecting rod movable mounting is a pair of on sliding block and the regulating plate, the supporting seat install in the scale is installed in one side, and the scale tip has the pointer.

The end fixing structure includes: the device comprises a lower pressure plate, an upper pressure plate, a pair of adjusting bolts with the same structure and a pair of adjusting blocks with the same structure;

the lower pressing plate is mounted on the adjusting plate, the upper pressing plate is mounted above the lower pressing plate, a pair of arc-shaped grooves with the same structure is symmetrically formed in the center positions of the lower pressing plate and the upper pressing plate, the adjusting bolts are movably mounted on the lower pressing plate, a pair of threaded holes with the same structure are formed in the two sides of the upper pressing plate matched with the adjusting bolts, the adjusting bolts are in threaded connection with the threaded holes, and the adjusting blocks are mounted at the end portions of the adjusting bolts.

The outer sides of the contact plates are both of inner arc structures, and rubber pads are arranged at the middle points of the inner arcs of the contact plates.

The pointer is aligned with the contact plate inner arc center point.

The double-wall corrugated pipe manufactured by the technical scheme of the invention has high structural strength according to the proportion in the scheme, compared with the common proportion, the proportion of the inner wall pipe increases the dosage of the fixed additive, increases certain strength, does not have damage, has better high bending strength, and is more suitable for being used in regions with larger height difference; this check out test set of MPVE double-walled bellows with high bending strength resistance, moreover, the steam generator is simple in structure, high durability and convenient use, can effectively detect out the pressure when the experiment pipe deforms through the propulsion detection mechanism above that, and can detect the pressure of different deformation degree, and simultaneously, can adjust test tube center through adjusting the structure, make it contact with contact plate center all the time, the accuracy of experimental result has been guaranteed, can be according to the both ends of the effective fixed test pipe of different pipe diameters through the tip fixed knot structure above that, the commonality has been strengthened and the performance of being convenient for operate, generally speaking, this check out test set is to the experiment of buckling of bellows, both make things convenient for its operation, do not occupy the usage space again, very big expense of the experimentation of buckling has been saved.

Drawings

Fig. 1 is a schematic front view of a manufacturing method of the MPVE double-wall corrugated pipe with high bending strength resistance and a detection device according to the present invention.

Fig. 2 is a schematic side view of the manufacturing method and the detection equipment of the MPVE double-wall corrugated pipe with high bending strength resistance according to the present invention.

Fig. 3 is a schematic top view of the manufacturing method and the detection apparatus of the MPVE double-wall corrugated pipe with high bending strength resistance according to the present invention.

Fig. 4 is a schematic top sectional structural view of the manufacturing method and the detection apparatus of the MPVE double-wall corrugated pipe with high bending strength resistance according to the present invention.

Fig. 5 is a schematic diagram of a side view structure of an elevated state of the method for manufacturing an MPVE double-wall corrugated pipe with high bending strength resistance and the detection apparatus of the present invention.

Fig. 6 is a schematic partial top view of the manufacturing method and the detection apparatus of the MPVE double-wall corrugated pipe with high bending strength resistance according to the present invention.

Fig. 7 is a partially enlarged structural schematic diagram of the method for manufacturing the MPVE double-wall corrugated pipe with high bending strength resistance and the detection apparatus according to the present invention shown in fig. 4.

Fig. 8 is a partially enlarged structural schematic diagram of the method for manufacturing the MPVE double-wall corrugated pipe with high bending strength resistance and the detection apparatus according to the present invention shown in fig. 5.

In the figure: 1. a fixing plate; 2. a slider; 3. a connecting plate; 4. a guide bar; 5. a sleeve; 6. inserting a rod; 7. connecting blocks; 8. a hydraulic cylinder; 9. a contact plate; 10. a support plate; 11. mounting a column; 12. a spring; 13. a sleeve; 14. a pressure sensor; 15. a limiting groove; 16. inserting a block; 17. a fixed seat; 18. a screw rod; 19. a slider; 20. an adjusting plate; 21. a connecting rod; 22. a supporting seat; 23. an indicator needle; 24. a lower pressing plate; 25. an upper pressure plate; 26. adjusting the bolt; 27. an adjusting block; 28. and (7) a rubber pad.

Detailed Description

The following describes the present invention in detail with reference to the accompanying drawings, and as shown in fig. 1-5, the method for preparing the MPVE double-wall corrugated pipe with high bending strength resistance includes the following steps, step S1, and ratio determination; step S2, weighing the mixed raw materials; step S3, feeding; step S4, extruding; step S5, molding; step S6, cutting and packaging; step S7, random sampling detection; s1: the weight fraction is taken as a unit, and the mixture ratio of various raw materials is as follows: the inner wall pipe comprises the following raw materials in proportion: 50-55 parts of polypropylene resin, 5-10 parts of reclaimed materials, 23-26 parts of fixed fillers, 4-5 parts of stearic acid, 3-7 parts of drying agents and 4-5 parts of dark green color master batch; the outer wall pipe comprises the following raw materials in proportion: 50-55 parts of polypropylene resin, 5-8 parts of reclaimed materials, 25-28 parts of fixed fillers, 4-6 parts of stearic acid, 3-6 parts of drying agents and 3-7 parts of dark green color master batches; s2: weighing the raw materials according to the ratio of the inner wall pipe raw material to the outer wall pipe raw material determined in the step S1, and respectively putting the raw materials into a double mixer for mixing, wherein the raw materials are divided into an inner material and an outer material; s3: forcibly feeding materials into the feeding machines regularly and quantitatively by vacuum feeding, wherein the rotating speed of the feeding machines is set to be 22-28 r/min, the two feeding machines are used for continuous feeding, and the set weight is 150-; s4: putting the mixed materials into a double-cone double-screw extruder, wherein the rotating speed control range is as follows: the outer wall pipe is 27-32 r/min, the inner wall pipe is 18-24 r/min, the melt mixed material is extruded through an extrusion die at 205-215 ℃ and 19MPa melt pressure, the extrusion die is divided into an inner opening die and an outer opening die, the inner opening die and the outer opening die are provided with adjusting screws, and the wall thickness is adjusted according to requirements; s5: controlling and shaping traction on the extruded and molded tube blank on a molding machine in a segmented manner, and simultaneously carrying out a flaring molding process, wherein the flaring starting length is 90-120mm, the flaring ending length is 320-350mm, the molding machine is provided with at least eight segments of molding processes, the setting range of the molding speed is 500-6000mm, the speed range is 85-110M/s, and the periphery of the molding machine is provided with a cooling fan; s6: cutting the double-wall corrugated pipe by a cutting machine, and packaging in batches; s7: randomly drawing out the corrugated pipe for bending detection; in the step S1, the mixture ratio of the raw materials is as follows: the inner wall pipe comprises the following raw materials in proportion: polypropylene resin 52, a reclaimed material 7, a fixed filler 24, stearic acid 6, a drying agent 7 and blackish green color master batch 4; the outer wall pipe comprises the following raw materials in proportion: 53 parts of polypropylene resin, 8 parts of reclaimed materials, 28 parts of fixed fillers, 4 parts of stearic acid, 3 parts of drying agents and 4 parts of dark green color master batches; the rotating speed of the feeding machine is controlled to be 23-25 r/min, and the set weight of feeding is 180 kg/h; in step S4, the rotation speed of the double-cone twin-screw extruder is controlled: the rotating speed of the outer wall pipe is 28-30 revolutions per minute, and the rotating speed of the inner pipe is 19-21 revolutions per minute; in the step S5, the flaring start length is controlled to be between 100 and 110mm, and the flaring end length is controlled to be between 330 and 335 mm; the preparation method and the detection equipment of the MPVE double-wall corrugated pipe with high bending strength resistance mainly comprise a fixed plate 1, a pair of end fixing structures with the same structure and a pair of adjusting structures with the same structure, wherein the pair of adjusting structures are arranged at two ends of the fixed plate 1, the pair of end fixing structures are arranged on the adjusting structures, and one side of the middle end of the fixed plate 1 is provided with a propulsion detection mechanism; the propulsion detection mechanism includes: a contact propulsion structure and a pressure detection structure; the contact advancing structure includes: the device comprises a pair of sliders 2 with the same structure, a connecting plate 3, a pair of guide rods 4 with the same structure, a sleeve 5, an inserted link 6, a connecting block 7 and a hydraulic cylinder 8; a pair of chutes with the same structure are formed in two sides of the center line of the fixed plate 1, the pair of sliders 2 are assembled in the pair of chutes, the connecting plate 3 is installed between the pair of sliders 2, a pair of through holes with the same structure are formed in the pair of sliders 2, the pair of guide rods 4 are assembled in the pair of through holes, the sleeve 5 is installed on the fixed plate 1 and located on one side of the connecting plate 3, the inserted link 6 is installed in the sleeve 5, one end of the inserted link is connected with the connecting plate 3 through the connecting block 7, and the hydraulic cylinder 8 is installed on the fixed plate 1, and the telescopic end of the inserted link is connected with the other end; the pressure detection structure includes: a pair of contact plates 9 with the same structure, a support plate 10, a pair of mounting columns 11 with the same structure, a pair of springs 12 with the same structure, a pair of sleeves 13 with the same structure and a pair of pressure sensors 14 with the same structure; the connecting plate 3 is provided with a pair of grooves with the same structure, the pair of contact plates 9 are arranged in the pair of grooves and can slide along the grooves, the supporting plate 10 is arranged on the connecting plate 3, the pair of mounting columns 11 are horizontally and vertically arranged on the pair of contact plates 9, and the pair of sleeves 13 are arranged on the supporting plate 10. The pair of pressure sensors 14 are embedded in the pair of sleeves 5, the pair of springs 12 are sleeved on the pair of mounting columns 11, the end parts of the springs are in contact with the pair of pressure sensors 14, and two pairs of limiting components with the same structure are arranged on the supporting plate 10 and positioned on two sides of the pair of contact plates 9; the spacing subassembly includes: a pair of limit grooves 15 with the same structure and a pair of insertion blocks 16 with the same structure; a pair of limiting grooves 15 with the same structure are symmetrically formed in two side wall surfaces of the contact plate 9, a pair of insertion blocks 16 matched with the support plates 10 are mounted on the support plates 10, and the insertion blocks 16 are inserted into the limiting grooves 15; the adjustment structure includes: the device comprises a fixed seat 17, a screw rod 18, a pair of sliding blocks 19 with the same structure, an adjusting plate 20, two pairs of connecting rods 21 with the same structure, a supporting seat 22 and an indicating needle 23; the fixing seat 17 is mounted at one end of the fixing plate 1, a sliding groove is formed in the fixing seat 17, the screw rod 18 is movably mounted on the fixing seat 17, a pair of reverse threaded holes are formed in a pair of sliding blocks 19 and are in threaded connection with the screw rod 18, the driving end of the adjusting motor is movably connected with the end part of the screw rod 18, the adjusting plate 20 is mounted above the fixing seat 17, two pairs of connecting rods 21 are movably mounted on the pair of sliding blocks 19 and the adjusting plate 20, the supporting seat 22 is mounted at one side of the scale, and an indicating needle 23 is arranged at the end part of; the end fixing structure includes: a lower pressure plate 24, an upper pressure plate 25, a pair of adjusting bolts 26 with the same structure and a pair of adjusting blocks 27 with the same structure; the lower pressing plate 24 is mounted on the adjusting plate 20, the upper pressing plate 25 is mounted above the lower pressing plate 24, a pair of arc-shaped grooves with the same structure are symmetrically formed in the center positions of the lower pressing plate and the upper pressing plate, a pair of adjusting bolts 26 are movably mounted on the lower pressing plate 24, a pair of threaded holes with the same structure are formed in the two sides of the upper pressing plate 25 matched with the lower pressing plate, the pair of adjusting bolts 26 are in threaded connection with the pair of threaded holes, and the pair of adjusting blocks 27 are mounted at the end parts of the pair of adjusting bolts 26; the outer sides of the contact plates 9 are both of an inner arc structure, and the middle point of the inner arc is provided with a rubber pad 28; the pointer 23 is aligned with the centre point of the inner arc of the contact plate 9.

The embodiment is characterized by comprising the following steps of S1, determining the mixture ratio; step S2, weighing the mixed raw materials; step S3, feeding; step S4, extruding; step S5, molding; step S6, cutting and packaging; step S7, random sampling detection; s1: the weight fraction is taken as a unit, and the mixture ratio of various raw materials is as follows: the inner wall pipe comprises the following raw materials in proportion: 50-55 parts of polypropylene resin, 5-10 parts of reclaimed materials, 23-26 parts of fixed fillers, 4-5 parts of stearic acid, 3-7 parts of drying agents and 4-5 parts of dark green color master batch; the outer wall pipe comprises the following raw materials in proportion: 50-55 parts of polypropylene resin, 5-8 parts of reclaimed materials, 25-28 parts of fixed fillers, 4-6 parts of stearic acid, 3-6 parts of drying agents and 3-7 parts of dark green color master batches; s2: weighing the raw materials according to the ratio of the inner wall pipe raw material to the outer wall pipe raw material determined in the step S1, and respectively putting the raw materials into a double mixer for mixing, wherein the raw materials are divided into an inner material and an outer material; s3: forcibly feeding materials into the feeding machines regularly and quantitatively by vacuum feeding, wherein the rotating speed of the feeding machines is set to be 22-28 r/min, the two feeding machines are used for continuous feeding, and the set weight is 150-; s4: putting the mixed materials into a double-cone double-screw extruder, wherein the rotating speed control range is as follows: the outer wall pipe is 27-32 r/min, the inner wall pipe is 18-24 r/min, the melt mixed material is extruded through an extrusion die at 205-215 ℃ and 19MPa melt pressure, the extrusion die is divided into an inner opening die and an outer opening die, the inner opening die and the outer opening die are provided with adjusting screws, and the wall thickness is adjusted according to requirements; s5: controlling and shaping and drawing the extruded and molded tube blank on a molding machine in a segmented manner, and simultaneously carrying out a flaring molding process, wherein the flaring starting length is 90-120mm, the flaring ending length is 320-350mm, the molding machine is provided with at least eight segments of molding processes, the setting range of the molding speed is 500-6000mm, the speed range is 85-110M/s, and the periphery of the molding machine is provided with a cooling fan; s6: cutting the double-wall corrugated pipe by a cutting machine, and packaging in batches; s7: randomly drawing out the corrugated pipe for bending detection; the double-wall corrugated pipe is high in structural strength according to the proportion in the scheme, compared with the common proportion, the amount of the fixed additive is increased in the proportion of the inner wall pipe, certain strength is increased, the damage condition is avoided, the double-wall corrugated pipe has better high bending strength, and the double-wall corrugated pipe is suitable for being used in regions with larger height difference; this check out test set of MPVE double-walled bellows with high bending strength resistance, moreover, the steam generator is simple in structure, high durability and convenient use, can effectively detect out the pressure when the experiment pipe deforms through the propulsion detection mechanism above that, and can detect the pressure of different deformation degree, and simultaneously, can adjust test tube center through adjusting the structure, make it contact with contact plate center all the time, the accuracy of experimental result has been guaranteed, can be according to the both ends of the effective fixed test pipe of different pipe diameters through the tip fixed knot structure above that, the commonality has been strengthened and the performance of being convenient for operate, generally speaking, this check out test set is to the experiment of buckling of bellows, both make things convenient for its operation, do not occupy the usage space again, very big expense of the experimentation of buckling has been saved.

All the electrical components in the present application are connected with the power supply adapted to the electrical components through the wires, and an appropriate controller should be selected according to actual conditions to meet the control requirements, and specific connection and control sequences should be obtained.