CN215750894U - Steel skeleton polyolefin pipeline and production device thereof - Google Patents

Abstract

The utility model provides a steel skeleton polyolefin pipeline and a production device thereof, wherein the steel skeleton polyolefin pipeline comprises a pipe inner layer, a steel skeleton and a pipe outer layer; the steel skeleton is positioned between the inner layer and the outer layer of the pipe; the steel skeleton is a steel belt, the steel belt is wound on the outer side of the inner layer of the pipe, and the outer layer of the pipe is coated on the outer side of the steel skeleton; and two sides of the steel skeleton are coated with bonding materials. The steel skeleton polyolefin pipeline in the scheme can bear larger pressure, and performance indexes of various aspects of products using the same materials and the same volume are far from the products produced by the prior process.

Description

Steel skeleton polyolefin pipeline and production device thereof

Technical Field

The utility model belongs to the technical field of polyolefin pipelines, and particularly relates to a steel skeleton polyolefin pipeline and a production device thereof.

Background

The polyolefin pipeline is widely applied to urban construction, and scenes such as gas pipelines, municipal water supply and drainage, sewage treatment, agricultural irrigation, communication power and the like need to be used. The existing pure plastic pipelines such as polyolefin water supply pipes, gas pipes, corrugated pipes and the like have poor radial bearing capacity, the pipelines are often extruded and deformed during construction and backfilling to influence the drift diameter, serious direct collapse and scrapping are caused, and the probability of the situation is higher in the use of large-caliber pipes. Some large-caliber pipes are pressed and deformed by self weight in the stacking process after products are off-line.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the background art, the utility model discloses a steel skeleton polyolefin pipeline production device, which comprises a pipe inner layer, a steel skeleton and a pipe outer layer;

the steel skeleton is positioned between the inner layer and the outer layer of the pipe;

the steel skeleton is a steel belt, the steel belt is wound on the outer side of the inner layer of the pipe, and the outer layer of the pipe is coated on the outer side of the steel skeleton;

and two sides of the steel skeleton are coated with bonding materials.

Optionally, the steel skeleton is a steel belt with a porous special-shaped structure, and the steel belt with the porous special-shaped structure is arranged close to the inner layer of the pipe.

Optionally, the steel skeleton is a steel belt with a non-porous reinforcing rib structure, and the steel belt with the non-porous reinforcing rib structure is arranged close to the outer layer of the pipe.

Optionally, a plurality of layers of steel frameworks are arranged between the outer layer and the inner layer of the pipe;

the steel belt with the porous special-shaped structure is arranged close to the inner layer of the pipe;

the steel belt with the pore-free reinforcing rib structure is arranged close to the outer layer of the pipe.

The utility model also discloses a steel skeleton polyolefin pipeline production device, which comprises a planetary rolling and winding machine;

the planetary rolling winding machine comprises a first machine frame and a winding unit arranged on the first machine frame;

the winding unit comprises a first planet turntable, a winding drive for driving the first planet turntable to rotate around a central shaft C, an upper compression roller, a lower compression roller and a steel belt drive for driving the upper compression roller or the lower compression roller to rotate so as to convey a steel belt to be wound;

the upper compression roller and the lower compression roller form a compression roller assembly, and a plurality of groups of compression roller assemblies are arranged on the first planetary turntable; and the inner layer of the pipe to be wound passes through a first inner hole in the center of the planetary rolling and winding machine, and the inner layer of the pipe and the first planetary turntable are coaxially arranged.

Optionally, the winding drive comprises a first turntable drive motor mounted on the first frame;

the first planetary turntable is arranged on the first rack through a turntable slewing bearing and is coaxially and fixedly connected with an outer supporting gear, and a gear at the output end of the first turntable driving motor is meshed with the outer supporting gear;

the steel belt drive comprises a second speed regulating gear arranged on the first rack, the second speed regulating gear is meshed with a corresponding press roller gear on the upper press roller or the lower press roller, and the second speed regulating gear and the first planetary turntable are coaxially arranged and have a rotation speed difference.

Optionally, the device further comprises a steel belt speed regulating unit, wherein the steel belt speed regulating unit comprises a connecting pipeline, the second speed regulating gear is coaxially fixed at one end of the connecting pipeline, and the other end of the connecting pipeline is coaxially fixed with a first speed regulating gear and a compression roller speed regulating motor;

the connecting pipeline is supported and mounted on the first frame through a driving gear;

and the first speed regulating gear is meshed and connected with a gear on the output end of the compression roller speed regulating motor.

Optionally, the first turntable driving motor is mounted on the outer cylinder of the first frame, and the first planetary turntable rotates around the central shaft C under the action of the first turntable driving motor.

Optionally, the first planetary turntable is further provided with a guide wheel and a reducing roller;

the guide wheel, the multiple groups of compression roller assemblies and the reducing roller are all arranged on the first planetary turntable through bearings;

the guide wheel is used for guiding the steel strip to be wound to an adjacent compression roller assembly for transmission;

the reducing roller is used for changing the radius of the circular arc formed by rolling the steel strip.

Optionally, the planetary rolling winding machine further comprises a feeding unit;

the feeding unit comprises a material ejecting cylinder, a material ejecting mechanism, a steel belt feeding area and a steel belt storing area, wherein the steel belt feeding area and the steel belt storing area are arranged on the first planetary turntable;

the steel belt feeding area is arranged in the steel belt storage area and close to one side of the material ejecting mechanism, and the upper end part of the other side of the steel belt storage area is provided with a limiting roller;

the liftout cylinder orders about liftout mechanism is along the direction round trip movement of the first planetary turntable face of perpendicular to, liftout mechanism includes two stations, and first station is located the steel band loading area outside, the second station is located steel band loading area top, when moving the second station from first station, will roll up in the steel band propelling movement of steel band loading area to the steel band storage area of spacing roller below department.

The utility model has the beneficial effects that:

(1) the steel strip is wound on the outer wall of the inner layer of the pipe through the winding unit.

(2) The speed of the steel belt speed regulating unit can be effectively changed when the steel belt is wound.

(3) The radius of the circular arc can be changed by the reducing roller when the steel strip is formed.

(4) The feeding unit can realize the circular conveying of the steel strip and ensure the stable input of the steel strip.

(5) According to the polyolefin pipeline produced by the utility model, the inner layer of the pipe, the outer layer of the pipe and the steel skeleton are integrated, so that the problem of stress cracking caused by different shrinkage rates of two different materials is effectively solved. The steel skeleton is provided with a porous special-shaped structure to disperse the internal pressure, so that a better internal pressure resistance effect is achieved. The steel skeleton of the non-porous reinforcing rib structure can enable the polyolefin pipeline to bear larger external pressure, and when the steel skeleton is used, two effects can be superposed, and performance indexes of all aspects of products using the same materials and the same volume are far away from the products produced by the existing process.

Drawings

FIG. 1 shows a schematic structural view of a steel skeleton polyolefin pipe according to an embodiment of the present invention;

FIG. 2 shows a schematic structural view of a steel skeleton polyolefin pipe according to another embodiment of the present invention;

FIG. 3 shows a schematic flow diagram of a steel skeleton polyolefin pipe production facility in an embodiment of the present invention;

FIG. 4 shows a cross-sectional view of a planetary roll winder in an embodiment of the present invention;

FIG. 4-A shows an enlarged view of portion A of FIG. 4;

FIG. 5 is a side view showing the positional relationship between the second timing gear, the inner layer of the pipe, the first planetary turntable, the lower pinch roller gear and the first frame in the embodiment of the present invention;

FIG. 6 shows a cross-sectional view between a second timing gear, a lower pressure roller gear, an upper pressure roller, a lower pressure roller, and a first planetary turntable in an embodiment of the present invention;

FIG. 7 shows a side view of an upper pressure roller, a lower pressure roller, a guide wheel, a reducing roller, and a first planetary turntable in an embodiment of the utility model;

FIG. 8 shows a perspective view of an upper pressure roller, a lower pressure roller, a guide wheel, a reducing roller, and a first planetary turntable in an embodiment of the utility model;

FIG. 9 shows a cross-sectional view of a planetary steel band aligner in an embodiment of the present invention;

FIG. 10 shows a cross-sectional view of a planetary steel strip setter of an embodiment of the present invention.

In the figure: 405. an inner layer of the pipe; 406. an outer layer of the pipe; 407. a steel skeleton; 1. a pipe inner layer extruder; 2. a first sizing device; 3. a first cooling device; 4. a first traction device; 5. a planetary rolling and winding machine; 6. a planetary steel belt arranging machine; 7. a planetary steel belt setting machine; 8. a heating device; 9. the outer layer of the tube is coated with an extruder; 10. a second shaping device; 11. a second cooling device; 12. a second traction device; 13. a cutting device; 14. turning over the pipe frame; 101. a material ejection cylinder; 102. a first frame; 103. a material ejecting mechanism; 104. a steel strip feeding area; 105. a steel belt storage area; 106. an upper compression roller; 107. the turntable is rotatably supported; 108. a first turntable drive motor; 109. a second speed regulating gear; 110. a drive gear support; 111. an outer cylinder; 112. connecting a pipeline; 113. a first speed regulating gear; 114. a lower pressing roller; 115. a compression roller speed regulating motor; 116. a guide wheel; 117. a first planetary turntable; 118. a lower compression roller gear; 119. a support outer gear; 120. a variable diameter roller; 121. an upper roller bearing; 122. a lower compression roller bearing; 123. a limiting roller; 201. a second frame; 202. a second turntable driving motor; 203. a drive chain; 204. a pinch roller; 205. arranging guide wheels on the steel strip; 206. shaping a pressing wheel set; 207. a wheel support; 208. a second planetary turntable; 209. a turntable support; 210. the turntable drives the gear; 301. a third frame; 302. a third wheel support; 303. a third planetary turntable; 304. a third shaping pressing wheel set; 305. a third turntable support; 306. a third drive chain; 307. the third rotary disc drives the gear; 308. and a third drive motor.

Detailed Description

The utility model discloses a production device of a steel skeleton polyolefin pipeline, which comprises a pipe inner layer extruder 1, a first shaping device 2, a first cooling device 3, a first traction device 4, a planetary rolling and winding machine 5, a planetary steel belt arranging machine 6, a planetary steel belt shaping machine 7, a heating device 8, a pipe outer layer cladding extruder 9, a second shaping device 10, a second cooling device 11, a second traction device 12, a cutting device 13 and a pipe turnover frame 14 which are sequentially arranged in a production line as shown in figure 3.

Wherein the pipe inner layer extruder 1 is used for extruding a pipe inner layer 405;

the first sizing device 2 is used for sizing the inner layer 405 of the extruded pipe;

the first cooling device 3 is used for cooling the shaped inner layer 405 of the pipe;

the first traction device 4 is used for drawing the inner layer 405 of the pipe to a subsequent production device;

the planetary rolling winding machine 5 is used for rolling and winding a steel belt on the outer wall of the inner layer 405 of the pipe;

the planetary steel belt arranging machine 6 is used for arranging steel belts wound on the inner layer 405 of the pipe;

the planetary steel belt setting machine 7 is used for further setting the arranged steel belts;

the heating device 8 is used for eliminating the stress on the steel strip;

the pipe outer layer coating extruder 9 is used for coating the pipe inner layer wound with the steel skeleton;

the second shaping device 10 is used for shaping the outer layer of the pipe;

the second cooling device 11 is used for cooling the outer layer of the pipe;

the second drawing device 12 is used for drawing the processed polyolefin pipe to the cutting device 13 for cutting.

The following describes each of the partial structures in detail.

1. Planetary rolling winding machine 5

As shown in fig. 4-7 and 4-a, the planetary rolling and winding machine 5 includes a first frame 102, and a winding unit, a steel strip speed regulating unit, and a feeding unit disposed on the first frame 102. The specific structure of each unit is described as follows:

1.1. winding unit

The winding unit includes a first planetary turntable 117, a winding drive for driving the first planetary turntable 117 to rotate about its central axis C, an upper press roller 106, a lower press roller 114, and a steel strip drive for driving the upper press roller 106 and the lower press roller to have a speed difference so as to transfer a steel strip to be wound. The central portion of the first planetary turntable 117 is provided with a first inner hole through which the inner layer 405 of the pipe can coaxially pass.

Specifically, the upper press roll 106 and the lower press roll 114 form a press roll assembly, a plurality of sets of press roll assemblies are arranged on the first planetary turntable 117, the inner layer 405 of the pipe to be wound penetrates through a first inner hole in the center of the planetary rolling and winding machine 5, and the inner layer 405 of the pipe and the first planetary turntable 117 are coaxially arranged.

The winding drive comprises a first turntable driving motor 108 mounted on the first frame 102, the first planetary turntable 117 is arranged on the first frame 102 through a turntable slewing bearing 107, a supporting external gear 119 is coaxially and fixedly connected, and a gear at the output end of the first turntable driving motor 108 is in meshing connection with the supporting external gear 119.

Specifically, the first planetary turntable 108 is mounted on the outer cylinder 111 of the first frame 102, the first planetary turntable 117 is movably connected to the first frame 102 through the turntable slewing bearing 107, the first planetary turntable 117 is coaxially and fixedly connected to the supporting outer gear 119, a gear at an output end of the first turntable 108 is meshed with the supporting outer gear 119, and the first planetary turntable 117 rotates around the central shaft C under the action of the first turntable driving motor 108. The first turntable driving motor 108 rotates to drive the supporting outer gear 119 to rotate, so as to drive the first planetary turntable 117 coaxially and fixedly connected with the supporting outer gear 119 to rotate.

The steel belt drive comprises a second speed regulating gear 109 arranged on the first rack 102, the second speed regulating gear 109 is meshed with a corresponding pressure roller gear on the upper pressure roller 106 or the lower pressure roller 114, the second speed regulating gear 109 and the first planetary turntable 117 are coaxially arranged and have a rotation speed difference, and the upper pressure roller 106 or the lower pressure roller 114 rotates to convey the steel belt. Specifically, the lower pressure roller 114 and the lower pressure roller gear 118 are coaxially disposed through a lower pressure roller shaft, and the upper pressure roller 106 and the lower pressure roller shaft are respectively fixed on the first planetary turntable 117 through an upper pressure roller bearing 121 and a lower pressure roller bearing 122. In this embodiment, the second governor gear 109 engages with the lower roll gear 118 to cause the lower roll 114 to rotate. The steel belt to be wound sequentially enters a plurality of groups of compression roller assemblies under the driving action of the steel belt and is finally wound on the outer wall of the inner layer 405 of the pipe.

Further, a second speed gear 109 as a steel belt drive may be fixed to the first frame 102, and a steel belt speed regulating unit for regulating the rotation speed of the second speed gear 109 may be further provided in order to change the conveying speed of the steel belt.

Preferably, as shown in fig. 7 and 8, the winding unit further includes a guide wheel 116 and a reducing roller 120 disposed on the first planetary turntable 117 through corresponding bearings. The guide wheel 116 is used for guiding the steel strip to be wound to an adjacent press roll assembly for transmission, specifically, the steel strip is wound in a rolling winding manner; the reducing roller 120 is used for changing the radius of the circular arc formed by rolling the steel strip. The dotted line in fig. 7 represents a steel belt, the steel belt passes through the guide wheel 116 under the action of the steel belt speed regulating unit, and then sequentially enters the press roll assembly annularly arranged on the first planetary turntable 117, and finally, under the action of the reducing roll 120, the steel belt is wound around the outer wall of the inner layer of the pipe.

1.2 Steel strip speed regulating Unit

As shown in fig. 4, 5 and 6, the steel belt speed regulating unit includes a connecting pipe 112, the second speed regulating gear 109 is coaxially fixed at one end of the connecting pipe 112, a first speed regulating gear 113 is coaxially fixed at the other end of the connecting pipe 112, and a pressure roller speed regulating motor 115 installed on the first frame 102 on the same side as the first speed regulating gear 113; and a gear on the output end of the press roll speed regulating motor 115 is meshed and connected with the first speed regulating gear 113.

A connecting duct 112 is mounted on the first frame 102 by a drive gear support 110.

The principle of the steel belt speed regulating unit is as follows: the pressure roller assembly provided on the first planetary turntable 117 rotates, i.e., is defined as a revolution, about the central axis C of the first planetary turntable 117.

When the second speed regulating gear 109 is fixed on the first frame 102, because there is a difference in rotational speed between the first planetary turntable 117 and the second speed regulating gear 109, the lower pressure roller gear 118 is engaged with the second speed regulating gear 109, and the lower pressure roller gear 118 revolves around the second speed regulating gear 109 to drive the lower pressure roller gear 118 to rotate, so that the lower pressure roller 114 coaxially connected with the lower pressure roller gear 118 rotates.

When the second speed regulating gear 109 is arranged on the first frame 102 through the steel belt speed regulating unit, the press roller speed regulating motor 115 enables the second speed regulating gear 109 to have a certain rotating speed, so as to adjust the rotating speed difference between the second speed regulating gear and the first planetary turntable 117, namely correspondingly adjust the self-rotating speed of the lower press roller 114. Specifically, when the rotation direction of the second governor gear 109 coincides with the rotation direction of the first planetary turntable 117, the lower pressure roller 114 decelerates; the lower roller 114 accelerates when the direction of rotation is reversed.

1.3. Feeding unit

The feeding unit comprises a material ejecting cylinder 101, a material ejecting mechanism 103, a steel belt feeding area 104 and a steel belt storage area 105, wherein the steel belt feeding area 104 and the steel belt storage area are arranged on a first planetary turntable 117;

the steel belt feeding area 104 is arranged in the steel belt storage area 105 and close to one side of the material ejecting mechanism 103, and the upper end part of the other side of the steel belt storage area 105 is provided with a limiting roller 123;

the material ejecting cylinder 101 drives the material ejecting mechanism 103 to move back and forth along the direction perpendicular to the surface of the first planetary turntable 117, the material ejecting mechanism 103 comprises two stations, the first station is located on the outer side of the steel belt feeding area 104, the second station is located above the steel belt feeding area 104, and when the first station moves to the second station, the steel belt coiled in the steel belt feeding area 104 is pushed into the steel belt storage area 105 below the limiting roller 123.

The feeding unit can firstly wind the steel belt positioned outside the production device on the steel belt feeding area 104, after the steel belt on the steel belt feeding area 104 is wound to a set thickness, the material ejecting mechanism 103 pushes the steel belt coil into the steel belt storage area 105, wherein the end part of the outmost layer of the steel belt coil is connected with the steel belt on the steel belt feeding area 104, and continuous feeding is realized in a non-stop state.

2. Planetary steel belt arranging machine

As shown in fig. 9, the planetary steel strip aligning machine 6 includes a second frame 201, a second turntable driving motor 202, a transmission chain 203, a pressing wheel 204, a steel strip aligning guide wheel 205, a shaping pressing wheel set 206 for shaping a steel strip on a pipe inner layer 405, a wheel support 207, a second planetary turntable 208, a turntable support 209, and a turntable driving gear 210.

The second planetary turntable 208 is disposed on the second frame 201 through a turntable support 209, and the second turntable driving motor 202 is fixedly disposed on the second frame 201 through a wheel support 207. The central part of the second planetary turntable 208 is provided with a second inner hole which is wound with a steel belt and can be penetrated by the inner layer 405 of the pipe.

The second turntable driving motor 202 is connected with the turntable driving gear 210 through the transmission chain 203, the turntable driving gear 210 is coaxially connected with the second planetary turntable 208, and the second planetary turntable 208 rotates at a constant speed under the action of the second turntable driving motor 202.

The pressing wheel 204, the steel strip arrangement guide wheel 205 and the shaping pressing wheel set 206 are mounted on the second planetary turntable 208 through a plurality of wheel brackets 207.

The working principle of the planetary steel belt arranging machine 6 is as follows: the inner pipe layer 405 wound with the steel skeleton passes through the second inner hole under the action of the tractor, and the pinch roller 204, the steel strip arrangement guide wheel 205 and the shaping pinch roller set 206 do circular motion around the outer wall of the inner pipe layer 405 in the rotation process of the second planetary turntable 208. The steel strip arrangement guide wheel 205 and the pinch roller 204 are arranged on the left side of the second planetary turntable 208, and the steel strip arrangement guide wheel 205 can adjust the arrangement interval of the steel strips wound on the inner layer of the pipe by adjusting the moving speed of the inner layer 405 of the steel material and the rotating speed of the second planetary turntable 208. The distance between the pinch roller and the steel strip is controlled by adjusting the roller support of the pinch roller 204. After being adjusted by the steel belt arrangement guide wheel 205, the steel belt is evenly compacted on the inner layer 405 of the pipe. The shaping pressing wheel set 206 is arranged on the right side of the second planetary turntable 208, and steel belts are arranged and pressed for the second time through the same principle, so that the construction quality of steel belt winding is further guaranteed.

Further, the wheel bracket 207 can be adjusted up and down, so that the processing range of pipes with different diameters can be adapted.

3. Planetary steel belt setting machine

As shown in fig. 10, the planetary steel belt forming machine includes a third wheel support 302, a third transmission chain 306, a third driving motor 308, a third frame 301, a third forming press wheel group 304, a third planetary wheel 303, a third wheel support 305 and a third wheel driving gear 307. A third inner hole through which the processed pipe can pass is formed in the center of the third planetary turntable 303.

The third planetary turntable 303 is fixed to the third frame 301 through a third turntable support 305, and the third turntable driving motor 308 is fixed to the third frame 301 through a bracket.

The third turntable driving motor 308 is connected with the third turntable driving gear 307 through a third transmission chain 306, the third turntable driving gear 307 is coaxially connected with the third planetary turntable 303, and the third planetary turntable 303 rotates around the central axis of the pipe under the action of the third driving motor 308. The third shaping press wheel set 304 is mounted on the third planetary turntable 303 through a plurality of third wheel mounts 302.

The working principle of the planetary steel belt setting machine is the same as that of the planetary steel belt arranging machine, and the construction quality of steel belt winding is further ensured through the plurality of groups of third setting pressing wheel groups 304.

Further, a third wheel bracket 302 is used for fixing the third shaping pressing wheel set 304, and the third wheel bracket 302 can be adjusted to adapt to the processing range of pipes with different diameters.

The utility model also discloses a steel skeleton polyolefin pipeline of using above-mentioned embodiment production, steel skeleton polyolefin pipeline includes tubular product inlayer 405, steel skeleton 407 and tubular product skin 406. The steel skeleton 407 is located between the inner layer 405 of pipe and the outer layer 406 of pipe. The inner layer 405 and the outer layer 406 of the pipe are made of polyolefin materials, and the polyolefin materials are plastic polymers such as polyethylene and polypropylene.

Illustratively, the steel skeleton 407 is implemented by a steel band wound around the outside of the inner layer 405 of the tube. The outer layer 406 of the pipe is wrapped outside the steel skeleton 407; the steel skeleton 407 is coated with adhesive material on both sides. The inner tube layer 405 and the outer tube layer 406 are connected to the steel skeleton 407 more tightly by means of an adhesive material.

The steel belt uses steel belts with different geometric structures according to the use occasions of the pipes, the pipe bearing internal pressure is a steel belt with a porous special-shaped structure, and the pipe bearing external pressure is a steel belt with a non-porous reinforced stud structure; if the pipe bears the internal and external pressure at the same time, the two structures can be superposed for use. The structure of the steel strip comprises a plurality of embodiments, specifically as follows:

example 1

As shown in fig. 1, the steel skeleton 407 is a steel belt with a porous irregular structure, the holes are arranged to enhance the effect of the adhesive material, so that the steel belt is more tightly adhered to the plastic pipe, when the outer layer 406 of the pipe is coated, the molten plastic connects the inner layer 405 of the pipe, the steel skeleton 407 and the outer layer 406 of the pipe into an integral structure through the porous structure on the steel belt, thereby enhancing the tightness of the connection among the inner layer 405 of the pipe, the steel skeleton 407 and the outer layer 406 of the pipe.

Furthermore, the steel skeleton 407 is in a shape of a Chinese character 'tu', which can increase the radial bearing capacity of the pipe. The steel frames 407 are equidistantly provided with bulges, and the steel frame 407 in the next circle presses a part of the steel frame 407 in the previous circle, so that the bulges of the upper steel frame 407 are matched with the bulges of the lower steel frame 407 in shape and position. The steel skeleton 407 is used to fix the position of the steel skeleton 407, so that the steel skeleton 407 reinforced layer is more firm and reliable.

Example 2

As shown in fig. 2, the steel frame 407 is a steel belt with a non-porous reinforcing structure. The steel skeleton 407 enables the polyolefin pipe to have strong radial bearing capacity, and the inner pipe layer 405, the steel skeleton 407 and the outer pipe layer 406 form an integral structure due to the adoption of the bonding material, so that no bonding point exists in the axial direction of the pipe, and the risk of glue failure and cracking of the winding type formed pipe due to the excessive bonding points is avoided. Because the inner layer and the outer layer of the pipe are formed by one-time extrusion, the steel skeleton 407 is completely coated inside the pipe to form a whole, and the problem of stress cracking caused by different shrinkage rates of two different materials is effectively solved. The steel skeleton 407 is added for reinforcement, so that the problems of small radial bearing capacity, deformation and the like of the pure plastic pipe are solved, and the performance of the pure plastic pipe is more remarkable particularly in the pipe with a larger caliber.

Example 3

For better results, a multi-layer steel skeleton 407 is provided between the outer layer 406 and the inner layer 405. Illustratively, the steel band with the porous irregular structure is arranged close to the inner layer 405 of the pipe, so as to disperse the internal pressure and achieve a better internal pressure resistance effect. The steel belt with the non-porous reinforcing rib structure is arranged close to the outer layer 406 of the pipe, so that the external pressure resistance effect of the pipe is further enhanced.

It should be noted that the steel frame 407 of the present invention is not limited to be made of steel strip, and is also applicable to other reinforced structures with certain hardness.

The utility model also discloses a production method of the steel skeleton polyolefin pipeline, which specifically comprises the following steps:

s1: producing the inner layer of the pipe by using an extruder, and carrying out shaping and cooling;

s2: rolling and bending the porous steel belt coated with the bonding material on the surface layer, and winding the porous steel belt on the outer wall of the inner layer of the pipe;

s3: heating the porous steel strip, wherein the stress generated by winding the porous steel strip can be eliminated while the adhesive material is softened by heating the porous steel strip; coating the outer layer of the pipeline on the outer wall of the heated steel belt, so that the softened adhesive material can connect the inner layer of the pipeline and the outer layer of the pipeline into a whole through a porous structure, and can coat the adhesive material on the surface;

s4: coating the inner layer of the pipe wound with the porous steel strip;

s5: and cooling and shaping the inner layer of the coated pipe.

The inner layer of the pipe and the outer layer of the pipe are integrally formed, and the outer layer of the pipe, the porous steel belt and the inner layer of the pipe are directly bonded together through the holes by the bonding material, so that the bonding of the inner layer of the pipe, the porous steel belt and the inner layer of the pipe is firmer without welding in the whole process.

Further, the steel strip in the embodiment of the present invention is not limited to one material of steel, and may be other hard structures.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims (10)

1. A steel skeleton polyolefin pipe is characterized in that,

the steel skeleton polyolefin pipeline comprises a pipe inner layer (405), a steel skeleton (407) and a pipe outer layer (406);

the steel skeleton (407) is positioned between the inner pipe layer (405) and the outer pipe layer (406);

the steel skeleton (407) is a steel belt, the steel belt is wound on the outer side of the inner pipe layer (405), and the outer pipe layer (406) is coated on the outer side of the steel skeleton (407);

and two surfaces of the steel skeleton (407) are coated with bonding materials.

2. The steel skeleton polyolefin pipe according to claim 1,

the steel skeleton (407) is a steel belt with a porous special-shaped structure, and the steel belt with the porous special-shaped structure is arranged close to the inner layer (405) of the pipe.

3. The steel skeleton polyolefin pipe according to claim 1,

the steel skeleton (407) is a steel belt with a non-porous reinforcing rib structure, and the steel belt with the non-porous reinforcing rib structure is arranged close to the outer layer (406) of the pipe.

4. The steel skeleton polyolefin pipe according to claim 1,

and a multi-layer steel skeleton (407) is arranged between the outer pipe layer (406) and the inner pipe layer (405).

5. A production apparatus for producing a steel skeleton polyolefin pipe according to any one of claims 1 to 4,

the steel skeleton polyolefin pipeline production device comprises a planetary rolling and winding machine (5);

the planetary rolling and winding machine (5) comprises a first frame (102) and a winding unit arranged on the first frame (102);

the winding unit comprises a first planetary turntable (117), a winding drive for driving the first planetary turntable (117) to rotate around the central axis C thereof, an upper pressing roller (106), a lower pressing roller (114), and a steel strip drive for driving the upper pressing roller (106) or the lower pressing roller (114) to rotate so as to convey a steel strip to be wound;

the upper pressing roller (106) and the lower pressing roller (114) form a pressing roller assembly, and a plurality of groups of pressing roller assemblies are arranged on the first planetary turntable (117); the inner layer of the pipe to be wound passes through a first inner hole in the center of the planetary rolling winding machine (5), and the inner layer (405) of the pipe is coaxially arranged with the first planetary turntable (117).

6. The production device according to claim 5,

the winding drive comprises a first turntable drive motor (108) mounted on a first frame (102);

the first planetary turntable (117) is arranged on the first frame (102) through a turntable rotary support (107), a supporting outer gear (119) is coaxially and fixedly connected with the first planetary turntable, and a gear at the output end of the first turntable driving motor (108) is meshed with the supporting outer gear (119);

the steel belt drive comprises a second speed regulating gear (109) arranged on the first rack (102), the second speed regulating gear (109) is meshed with a corresponding pressure roller gear on the upper pressure roller (106) or the lower pressure roller (114), and the second speed regulating gear (109) and the first planetary turntable (117) are coaxially arranged and have a rotation speed difference.

7. The production device according to claim 6,

the steel belt speed regulating device comprises a steel belt speed regulating unit, wherein the steel belt speed regulating unit comprises a connecting pipeline (112), the second speed regulating gear (109) is coaxially fixed at one end of the connecting pipeline (112), and the other end of the connecting pipeline (112) is coaxially fixed with a first speed regulating gear (113) and a compression roller speed regulating motor (115);

a connecting pipe (112) is mounted on the first frame (102) through a driving gear support (110);

the first speed regulating gear (113) is meshed with a gear on the output end of the pressure roller speed regulating motor (115).

8. The production device according to claim 5,

the first turntable driving motor (108) is arranged on the outer cylinder (111) of the first frame (102), and the first planetary turntable (117) rotates around the central shaft C under the action of the first turntable driving motor (108).

9. The production device according to claim 5,

the first planetary turntable (117) is also provided with a guide wheel (116) and a reducing roller (120);

the guide wheel (116), the multiple groups of compression roller assemblies and the reducing roller (120) are all mounted on the first planetary turntable (117) through bearings;

the guide wheel (116) is used for guiding the steel strip to be wound to an adjacent press roll assembly for conveying;

the reducing roller (120) is used for changing the radius of the circular arc formed by rolling the steel strip.

10. The steel skeleton polyolefin pipe production apparatus of claim 5,

the planetary rolling and winding machine (5) also comprises a feeding unit;

the feeding unit comprises a material ejecting cylinder (101), a material ejecting mechanism (103), a steel belt feeding area (104) and a steel belt storage area (105), wherein the steel belt feeding area and the steel belt storage area are arranged on a first planetary turntable (117);

the steel belt feeding area (104) is arranged in the steel belt storage area (105) and close to one side of the material ejecting mechanism (103), and the upper end part of the other side of the steel belt storage area (105) is provided with a limiting roller (123);

the ejection mechanism (103) is driven by the ejection cylinder (101) to move back and forth along the direction perpendicular to the surface of the first planetary turntable (117), the ejection mechanism (103) comprises two stations, the first station is located on the outer side of the steel belt feeding area (104), the second station is located above the steel belt feeding area (104), and when the ejection mechanism moves to the second station from the first station, a steel belt coiled in the steel belt feeding area (104) is pushed into the steel belt storage area (105) below the limiting roller (123).

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