CN112879686A

CN112879686A - High-strength durable double-wall corrugated pipe and processing technology thereof

Info

Publication number: CN112879686A
Application number: CN202110023528.0A
Authority: CN
Inventors: 方蔚清
Original assignee: Zhejiang Jintang Pipe Technology Co ltd
Current assignee: Zhejiang Jintang Pipe Technology Co ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-06-01
Anticipated expiration: 2041-01-08
Also published as: CN112879686B

Abstract

The invention discloses a high-strength durable double-wall corrugated pipe and a processing technology thereof, belonging to the field of corrugated pipes, wherein the corrugated section of the corrugated pipe can be plugged through the arrangement of a scale lodging layer, so that the sunken part of the corrugated pipe is separated from water flow, the deposition of impurities at the sunken part is effectively avoided, the sunken part of the corrugated pipe is further effectively protected from local corrosion and aging, the strength is improved, the service life is prolonged, the outer side of the corrugated pipe is in a relatively straight state under the action of the scale lodging layer, the resistance of the corrugated pipe to the water flow in a ditch is effectively reduced, in addition, a plurality of double-scale rings attached to the scale lodging layer in an lodging shape are arranged, the double-scale rings at the sunken part can be stressed and separated when being subjected to bending force, so that the scale lodging layer plays a role in protection and simultaneously does not easily influence the self stretching or bending function of the corrugated pipe, is convenient for use.

Description

High-strength durable double-wall corrugated pipe and processing technology thereof

Technical Field

The invention relates to the field of corrugated pipes, in particular to a high-strength durable double-wall corrugated pipe and a processing technology thereof.

Background

A high-density polyethylene (HDPE) double-wall corrugated pipe is a novel pipe with an outer wall with an annular structure and a smooth inner wall, and is firstly developed in Germany in the early 80 s. The inner wall of the double-wall corrugated pipe is generally blue or black in color, and yellow is used for part of brands of inner walls. High Density Polyethylene (HDPE) has excellent chemical stability, aging resistance, and environmental stress cracking resistance. HDPE double-wall corrugated pipe produced by using the HDPE double-wall corrugated pipe as a raw material belongs to flexible pipes. The main properties are as follows:

the external pressure resistance is strong: the outer wall is in an annular corrugated structure, the annular rigidity of the pipe is greatly enhanced, and therefore the resistance of the pipeline to soil load is enhanced.

The construction cost is low: under the condition of the same load, the HDPE double-wall corrugated pipe only needs a thinner pipe wall to meet the requirement. Therefore, compared with a solid-wall pipe with the same material specification, the HDPE double-wall corrugated pipe can save about half of raw materials, and is lower in manufacturing cost. This is yet another outstanding feature of the pipe.

The construction is convenient: because the HDPE double-wall corrugated pipe has light weight and is convenient to carry and connect, the construction is quick and the maintenance work is simple. Under the condition of tight construction period and poor construction conditions, the advantages are more obvious.

The friction coefficient is small, and the flow is large: the HDPE double-wall corrugated pipe adopting HDPE as the material can pass larger flow than other pipes with the same caliber. In other words, HDPE double-wall corrugated pipe with a relatively small caliber can be used for the same flow requirement.

Low temperature resistance and impact resistance: the embrittlement temperature of HDPE double-walled corrugated pipe is-70 ℃. When in construction under the condition of low temperature (above minus 30 ℃), special protection measures are not needed, the construction is convenient in winter, and the HDPE double-wall corrugated pipe has good impact resistance.

The chemical stability is good: since the HDPE molecules are not polar, the chemical stability is excellent. Most chemical media do not destroy them except a few strong oxidizers. The pipeline cannot be damaged by soil, electric power and acid and alkali factors of a common use environment, bacteria cannot grow, scaling cannot occur, and the flow area cannot be reduced along with the increase of the operation time.

The service life is long: the service life of the HDPE double-wall corrugated pipe can reach more than 50 years under the condition of not being subjected to sunlight and ultraviolet rays.

Excellent wear resistance: germany has demonstrated that HDPE has even several times higher abrasion resistance than steel pipe.

Appropriate degree of flexure: the HDPE double-wall corrugated pipe with a certain length can be slightly bent axially, is not influenced by the uneven settlement of the ground to a certain degree, can be directly paved in a slightly-straight groove without using pipe fittings, and the like.

The corrugated section of part bellows generally exposes outside and uses in prior art, when this kind of bellows was placed and is used in drainage or the aqueduct of crossing water, not only can produce great resistance to rivers, simultaneously aquatic impurity easily adheres to the sunken part of bellows and deposit, sedimentary silt can influence the change of bellows direction on the one hand, leads to its direction to be restricted, does not reach the effect of unloading protection, on the other hand its long-term deposit is in the depressed part, easily accelerates the ageing corrosion of bellows this department, leads to the intensity to descend, influences life.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a high-strength durable double-wall corrugated pipe and a processing technology thereof, the corrugated section of the corrugated pipe can be blocked by arranging a scale-shaped photovoltaic layer, so that the sunken part of the corrugated pipe is separated from water flow, the deposition of impurities at the sunken part is effectively avoided, the sunken part of the corrugated pipe is further effectively protected from local corrosion and aging, the strength is improved, the service life is prolonged, the outer side of the corrugated pipe is in a relatively straight state under the action of the scale-shaped photovoltaic layer, the resistance of the corrugated pipe to the water flow in a ditch is effectively reduced, in addition, the arrangement of a plurality of double-scale rings attached to the scale-shaped photovoltaic layer in a lodging shape is adopted, when the corrugated pipe is subjected to bending force, the double-scale rings at the sunken part can be stressed and separated, so that the scale-shaped photovoltaic layer plays a role in protection, and simultaneously, the self stretching or bending function of the corrugated pipe is, is convenient for use.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides a durable double-jade bellows excels in, includes ripple end and the straight end of difference fixed connection at ripple end both ends, ripple end outer end is attached has the scale to lie in the layer that lies in, the scale lies in the layer that lies in two marginal location layers on the straight end, connects outer interception between two marginal location layers and a plurality of fixed connection intercept the two scale rings of photovoltaic layer surface outward, outer interception is put up the layer and is contacted with a plurality of tops of ripple end outside towards, the marginal location layer bonds each other with the part of straight end contact, scale photovoltaic layer outer end is inlayed and is had a plurality of evenly distributed's two scale rings, two scale rings include two scales respectively with outer interception photovoltaic layer fixed connection's the voltage ring and fixed connection and keep away from the fixed weight ring of outer interception voltage layer tip at two scale rings, the space that encloses between ripple end and the voltage layer communicates with each other with the two scale rings, through the setting that the scale was laid down the layer, can the shutoff ripple section of this bellows, make bellows depressed part and rivers part, effectively avoid the deposit of impurity in this department, and then the difficult condition that takes place the local corrosion ageing of depressed part of effective protection this bellows, and the high strength, increase of service life, and under the effect of scale is laid down the layer, this bellows outside presents the state straight relatively, effectively reduce its resistance to rivers in the irrigation canals and ditches, through the attached setting of a plurality of two scale rings on the scale is laid down the layer of lodging form in addition, when receiving the bending force, this two scale rings of department can the atress separate along with it, and then make the scale lay down the layer when playing the guard action, be difficult for influencing the flexible or crooked function of this bellows itself, convenient to use.

It is further, a plurality of two scale rings are contactless each other, make two scale rings be difficult for each other causing piling up of silt when using each other, and two scale rings all are the attached interception layer surface outside of lodging form, when this bellows was put and is used in the irrigation canals and ditches, the mobility that two scale rings of lodging were difficult for having an influence to the escape canal normal water.

Further, the outer surface threaded connection of straight end has outer spacing spiro, outer spacing spiro is located the edge location layer outside, and outer spacing spiro can fix once more edge location layer department spacing for edge location layer tip is difficult for skinning to drop in the use, and then effectively guarantees the joint strength that the scale was prostrate the layer, makes its guard action to this bellows outer end stronger, and then effectively improves the intensity of this bellows, makes it be difficult for piling up in the depressed part because of impurity, causes the condition that the local corrosion is ageing.

Further, two a plurality of evenly distributed's of fixedly connected with accuse position rope between the photovoltaic ring inner wall, and accuse position rope is made for elastic material, accuse position rope can two photovoltaic rings of effective control be close to the laminating each other, when this bellows takes place certain crooked, when the layer is stretched and tightened under the bending force effect, accuse position rope can stretch, make the distance between two photovoltaic rings crescent, thereby adapt to its crooked, and then make the scale lie prostrate the layer when playing the guard action, be difficult for influencing the flexible or crooked function of this bellows itself, convenient to use.

Furthermore, a plurality of the direction length that the accuse position rope was held up the layer from outside and is decided the ring to the counter weight shortens gradually for in this direction, two photovoltaic rings are by the required power of tensile separation bigger and bigger, effectively control the bending angle of this bellows promptly, effectively avoid because of local bending angle too big because of the condition emergence of the too big damage of atress.

Further, the flexible ring of one end fixedly connected with reinforcement that the ring surface was decided to the counter weight is attached to the photovoltaic ring tip, and two tip are close to each other, the flexible ring of reinforcement is decided ring fixed connection with the counter weight, and two photovoltaic rings use the counter weight to decide the ring and be the center to connect through the flexible ring of reinforcement and form integratively, effectively improve the joint strength between two photovoltaic rings on the one hand, make this department be difficult for the damage that drops, on the other hand counter weight is decided the counter weight that the ring can photovoltaic ring tip, makes the difficult perk of two scale rings, can attach and intercept the photovoltaic layer surface outside.

Further, the counter weight stationary ring is made for the stereoplasm structure, and the smooth setting of counter weight stationary ring surface, the flexible ring elastic material of reinforcement makes, and counter weight stationary ring and the flexible ring cross-section of reinforcement constitute complete sphere, makes two photovoltaic ring tip attached when the counter weight stationary ring is outer, possesses the effect of certain power of unloading, makes two photovoltaic rings of this department be difficult for damaging because of the atress.

A high-strength durable double-wall corrugated pipe is prepared by the following steps:

s1, firstly, mixing the raw materials, and carrying out high-temperature melting to form molten liquid;

s2, extruding the molten liquid into a die cavity of a circularly opening and closing die through an extruder, continuously closing the circularly opening and closing die at the starting end under the action of an automatic assembly line, automatically opening the circularly opening and closing die outside the corrugated thick pipe at the extrusion end, and preliminarily pressurizing to form the corrugated thick pipe;

s4, cooling, hardening and forming the corrugated thick pipe through a water-cooling spraying system, and then drying;

s5, attaching a scale-shaped layer to the outer wall of the dried corrugated thick pipe, and carrying out hot-pressing fixation on the end part of the corrugated thick pipe;

s5, screwing the outer limiting spiral ring to the outer surface of the straight end after fixing, then carrying out pressure bearing test, and obtaining the high-strength durable double-wall corrugated pipe through the pressure bearing test.

Further, the temperature of the high-temperature melting in the S1 is 350-400 ℃.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) this scheme is through the setting that the scale lies prostrate the layer, can the shutoff ripple section of this bellows, make bellows depressed part and rivers part, effectively avoid the deposit of impurity in this department, and then the difficult condition that takes place the local corrosion ageing of depressed part of effective protection this bellows, and the high strength, increase of service life, and under the effect of scale layer of laying down, this bellows outside presents the state straight relatively, effectively reduce its resistance to rivers in the irrigation canals and ditches, through the attached setting of a plurality of two scale rings on the scale layer of laying down of lodging form in addition, when receiving the bending force, this two scale rings of department can the atress separate along with it, and then make the scale layer of laying down when playing the guard action, be difficult for influencing the flexible or crooked function of this bellows itself, convenient to use.

(2) A plurality of two scale rings are contactless each other, make two scale rings be difficult for each other causing piling up of silt when using each other, and two scale rings all are the attached interception layer surface outside of lodging form, when this bellows is put and is being used in the irrigation canals and ditches, the mobility that two scale rings of lodging are difficult for having an influence to the escape canal normal water.

(3) The outer surface of the straight end is in threaded connection with an outer limiting spiral ring, the outer limiting spiral ring is located on the outer side of the edge positioning layer, the outer limiting spiral ring can fix and limit the edge positioning layer again, the end part of the edge positioning layer is not prone to peeling and falling off in the using process, the connecting strength of the flake-shaped photovoltaic layer is effectively guaranteed, the protective effect of the outer end of the corrugated pipe is stronger, the strength of the corrugated pipe is effectively improved, the corrugated pipe is not prone to accumulation in a sunken position due to impurities, and the condition of local corrosion aging is caused.

(4) A plurality of evenly distributed's of fixedly connected with accuse position rope between two photovoltaic ring inner walls, and accuse position rope is made for elastic material, accuse position rope can be close to the laminating each other for two photovoltaic rings of effective control, when this bellows takes place certain crooked, when the layer is stretched and tightened by the tensile in the effect of bending force down the scale, accuse position rope can be stretched, make the distance between two photovoltaic rings crescent, thereby adapt to its crooked, and then make the scale lie prostrate the layer when playing the guard action, be difficult for influencing the flexible or crooked function of this bellows itself, convenient to use.

(5) The direction length that a plurality of accuse position ropes were pressed down the layer to the counter weight from outer interception shortens gradually for in this direction, two photovoltaic rings are more and more big by the required power of tensile separation, effectively control the bending angle of this bellows promptly, effectively avoid because of local bending angle too big because of the condition emergence of the too big damage of atress.

(6) The flexible ring of one end fixedly connected with reinforcement that two tip are close to each other, the flexible ring of reinforcement and balance weight decide ring fixed connection, two voltage ring use the balance weight to decide the ring and be the center, and connect through the flexible ring of reinforcement and form integratively, effectively improve the joint strength between two voltage ring on the one hand, make this department be difficult for the damage that drops, on the other hand balance weight decides the counter weight that the ring can voltage ring tip, make the difficult perk of two scale rings, can attach and intercept the voltage layer surface outside.

(7) The counter weight stationary ring is made for the stereoplasm structure, and the smooth setting of counter weight stationary ring surface, and the flexible ring elastic material of reinforcement makes, and counter weight stationary ring and the flexible ring cross-section of reinforcement constitute complete sphere, make two photovoltaic ring tip attached when outside the counter weight stationary ring, possess certain effect of unloading power, make two photovoltaic rings of this department be difficult for damaging because of the atress.

Drawings

FIG. 1 is a schematic partial perspective view of the present invention;

FIG. 2 is a schematic structural diagram of the front side of the present invention;

FIG. 3 is a schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic structural view of the front face of a double scale ring of the present invention;

fig. 5 is a schematic view of the structure of the end portion of the double-scale ring of the present invention.

The reference numbers in the figures illustrate:

the device comprises a flat end 11, a corrugated end 12, an outer limiting spiral ring 2, a scale-3 photovoltaic layer, an outer interception photovoltaic layer 31, an edge positioning layer 32, a counterweight fixing ring 4, a double scale ring 5, a scale-51 ring, a reinforcing flexible ring 52 and a position control rope 6.

Detailed Description

The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-2, a high-strength durable double-wall corrugated pipe comprises a corrugated end 12 and straight ends 11 fixedly connected to two ends of the corrugated end 12 respectively, a scale containing layer 3 is attached to the outer end of the corrugated end 12, an outer limit spiral ring 2 is in threaded connection with the outer surface of the straight end 11, the outer limit spiral ring 2 is located outside an edge positioning layer 32, and the outer limit spiral ring 2 can fix and limit the edge positioning layer 32 again, so that the end of the edge positioning layer 32 is not prone to peeling and falling off in the using process, the connection strength of the scale containing layer 3 is effectively guaranteed, the outer end of the corrugated pipe is protected more strongly, the strength of the corrugated pipe is effectively improved, and the corrugated pipe is not prone to local corrosion and aging caused by accumulation of impurities in a sunken position.

Referring to fig. 3, the scale-shaped photovoltaic layer 3 includes two edge positioning layers 32 located on the flat end 11, an outer blocking photovoltaic layer 31 connected between the two edge positioning layers 32, and a plurality of double scale rings 5 fixedly connected to the outer surface of the outer blocking photovoltaic layer 31, the outer blocking photovoltaic layer 31 contacts with a plurality of outward-facing top ends of the corrugated ends 12, the contact portions of the edge positioning layers 32 and the flat end 11 are adhered to each other, and the outer end of the scale-shaped photovoltaic layer 3 is embedded with a plurality of evenly-distributed double scale rings 5.

Referring to fig. 4, the double-scale ring 5 includes two scale rings 51 fixedly connected to the outer intercepting layer 31 and a weight fixing ring 4 fixedly connected to an end portion of the two scale rings 51 far from the outer intercepting layer 31, a space enclosed between the ripple end 12 and the scale layer 3 is communicated with the double-scale ring 5, the double-scale rings 5 are not in contact with each other, so that the double-scale rings 5 are not likely to cause accumulation of silt when in use, and the double-scale rings 5 are attached to the surface of the outer intercepting layer 31 in an inverted shape, when the corrugated pipe is used in a trench, the inverted double-scale rings 5 are not likely to affect the fluidity of water in the trench, a plurality of evenly distributed position control ropes 6 are fixedly connected between inner walls of the two scale rings 51, and the position control ropes 6 are made of an elastic material, the position control ropes 6 can effectively control the two scale rings 51 to be close to each other and attached, when this bellows takes place certain crooked, when the scale is laid layer 3 and is stretched tightly under the bending force effect, accuse position rope 6 can be stretched, make the distance between two wafer rings 51 crescent, thereby adapt to its bending, and then make the scale lie layer 3 when playing the guard action, be difficult for influencing the flexible or crooked function of this bellows itself, convenient to use, a plurality of accuse position ropes 6 from outer interception lie in layer 31 to the direction length of counter weight retaining ring 4 shortens gradually, make in this direction, two wafer rings 51 are more and more big by the required power of tensile separation, the bending angle of this bellows of effective control promptly, effectively avoid taking place because of the too big condition of damage of atress of local bending angle.

Referring to fig. 5, the end of the flat ring 51 is attached to the outer surface of the counterweight fixed ring 4, and the end of the two ends close to each other is fixedly connected with the reinforcing flexible ring 52, the reinforcing flexible ring 52 is fixedly connected with the counterweight fixed ring 4, the two flat rings 51 are centered on the counterweight fixed ring 4 and are connected into a whole through the reinforcing flexible ring 52, on one hand, the connecting strength between the two flat rings 51 is effectively improved, so that the flat ring is not easy to fall off and damage, on the other hand, the counterweight fixed ring 4 can balance the counterweight at the end of the flat ring 51, so that the double-scale ring 5 is not easy to tilt up and can be attached to the surface of the outer blocking flat layer 31, the counterweight fixed ring 4 is made of a hard structure, the outer surface of the counterweight fixed ring 4 is smoothly arranged, the reinforcing flexible ring 52 is made of an elastic material, and the sections of the counterweight fixed ring 4 and the reinforcing flexible ring 52 form a complete sphere, so that when the ends of, the two tab rings 51 are not easily broken by force.

s1, firstly, mixing the raw materials, and carrying out high-temperature melting to form molten liquid, wherein the temperature of the high-temperature melting is 350-400 ℃;

s5, attaching the scale-shaped photovoltaic layer 3 to the outer wall of the dried corrugated thick pipe, and carrying out hot-pressing fixation on the end part of the corrugated thick pipe;

s5, screwing the outer limiting spiral ring 2 to the outer surface of the straight end 11 after fixing, then carrying out pressure bearing test, and obtaining the high-strength durable double-wall corrugated pipe through the pressure bearing test.

Through the setting that the scale lodged layer 3, can the ripple section of this bellows of shutoff, make bellows depressed part and rivers part, effectively avoid the deposit of impurity in this department, and then the difficult condition that takes place the local corrosion ageing of depressed part of effective protection this bellows, and the high strength, increase of service life, and under the effect of scale lodged layer 3, this bellows outside presents the state straight relatively, effectively reduce its resistance to rivers in the irrigation canals and ditches, through the attached setting of a plurality of two scale rings 5 on scale lodged layer 3 of lodging form in addition, when receiving the bending force, this two scale rings 5 of this department can atress separation along with it, and then make lodged scale layer 3 when playing the guard action, be difficult for influencing the flexible or crooked function of this bellows itself, convenient to use.

The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.

Claims

1. The utility model provides a durable double-walled bellows excels in, includes ripple end (12) and respectively fixed connection at straight end (11) at ripple end (12) both ends, its characterized in that: the corrugated end (12) outer end is attached with a scale photovoltaic layer (3), the scale photovoltaic layer (3) comprises two edge positioning layers (32) positioned on a straight end (11), an outer interception photovoltaic layer (31) connected between the two edge positioning layers (32) and a double scale ring (5) fixedly connected with the outer surface of the outer interception photovoltaic layer (31), the outer interception photovoltaic layer (31) is contacted with a plurality of tops of the corrugated end (12) towards the outer side, the edge positioning layers (32) are mutually bonded with the part contacted with the straight end (11), the outer end of the scale photovoltaic layer (3) is inlaid with a plurality of evenly distributed double scale rings (5), each double scale ring (5) comprises two scale rings (51) fixedly connected with the outer interception photovoltaic layer (31) and a counterweight fixed ring (4) fixedly connected with the two scale rings (51) and far away from the end part of the outer interception photovoltaic layer (31), and the space enclosed by the corrugated end (12) and the scale photovoltaic layer (3) is communicated with the double scale rings (5).

2. A high strength durable double wall corrugated pipe as claimed in claim 1, wherein: the double-scale rings (5) are not in contact with each other, and the double-scale rings (5) are attached to the surface of the outer interception and lodging layer (31) in an lodging shape.

3. A high strength durable double wall corrugated pipe as claimed in claim 1, wherein: the outer surface of the straight end (11) is in threaded connection with an outer limiting spiral ring (2), and the outer limiting spiral ring (2) is located on the outer side of the edge positioning layer (32).

4. A high strength durable double wall corrugated pipe as claimed in claim 1, wherein: a plurality of evenly distributed position control ropes (6) are fixedly connected between the inner walls of the two voltage ring rings (51), and the position control ropes (6) are made of elastic materials.

5. A high strength durable double wall corrugated pipe as claimed in claim 4, wherein: the lengths of the plurality of position control ropes (6) from the outer interception photovoltaic layer (31) to the counterweight fixed ring (4) are gradually shortened.

6. A high strength durable double wall corrugated pipe as claimed in claim 1, wherein: the end part of the photovoltaic sheet ring (51) is attached to the outer surface of the counterweight fixed ring (4), the two end parts of the photovoltaic sheet ring are mutually close to one end of the reinforcing flexible ring (52), and the reinforcing flexible ring (52) is fixedly connected with the counterweight fixed ring (4).

7. A high strength durable double wall corrugated pipe as claimed in claim 6, wherein: the counterweight fixed ring (4) is made of a hard structure, the outer surface of the counterweight fixed ring (4) is smoothly arranged, the reinforcing flexible ring (52) is made of elastic material, and the sections of the counterweight fixed ring (4) and the reinforcing flexible ring (52) form a complete sphere.

8. A high strength durable double wall corrugated pipe as claimed in claim 1, wherein: the preparation process comprises the following steps:

s5, attaching a scale-shaped layer (3) to the outer wall of the dried corrugated thick pipe, and carrying out hot-pressing fixation on the end part of the corrugated thick pipe;

s5, screwing the outer limiting spiral ring (2) to the outer surface of the flat end (11) after fixing, and then carrying out a pressure bearing test to obtain the high-strength durable double-wall corrugated pipe.

9. A high strength durable double wall corrugated pipe as claimed in claim 1, wherein: the temperature of the high-temperature melting in the S1 is 350-400 ℃.