阅读说明：本技术 一种耐高压hdpe水管的加工工艺 (Processing technology of high-pressure-resistant HDPE (high-density polyethylene) water pipe ) 是由 季琨 舒琳 钱海波 马利军 韦平 马刚 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种耐高压HDPE水管的加工工艺,该耐高压HDPE水管包括内管层、内钢丝层,内管层外表面包覆有内钢丝层,内钢丝层外表面设有中间管层,中间管层外表面包覆有外钢丝层,外钢丝层外表面设有外管层；通过将单层HDPE水管改制成五层复合结构的HDPE水管,通过水管原料提高了水管的化学性能,设置的内钢丝层、外钢丝层对水管内壁和外壁均进行了保护,增加了HDPE水管耐压强度,使得HDPE水管不易发生破裂,具有良好的抗冲击性能,延长了HDPE水管的使用寿命；用来制作内钢丝层、外钢丝层的绕线装置通过第二绕线机构、第一绕线机构可以同时进行两个方向的钢丝缠绕过程,节省了绕线的时间,提高了工作效率。(The invention discloses a processing technology of a high-pressure-resistant HDPE water pipe, which comprises an inner pipe layer and an inner steel wire layer, wherein the outer surface of the inner pipe layer is coated with the inner steel wire layer; by changing a single-layer HDPE water pipe into a five-layer HDPE water pipe with a composite structure, the chemical performance of the water pipe is improved through the raw materials of the water pipe, the inner steel wire layer and the outer steel wire layer protect the inner wall and the outer wall of the water pipe, the compressive strength of the HDPE water pipe is increased, the HDPE water pipe is not easy to break, the HDPE water pipe has good impact resistance, and the service life of the HDPE water pipe is prolonged; the winding device for manufacturing the inner steel wire layer and the outer steel wire layer can simultaneously perform the steel wire winding process in two directions through the second winding mechanism and the first winding mechanism, so that the winding time is saved, and the working efficiency is improved.)

1. The processing technology of the high-pressure-resistant HDPE water pipe is characterized by comprising an inner pipe layer (101) and an inner steel wire layer (102), wherein the outer surface of the inner pipe layer (101) is coated with the inner steel wire layer (102), the outer surface of the inner steel wire layer (102) is provided with a middle pipe layer (103), the outer surface of the middle pipe layer (103) is coated with an outer steel wire layer (104), and the outer surface of the outer steel wire layer (104) is provided with an outer pipe layer (105);

the processing technology of the high-pressure-resistant HDPE water pipe comprises the following steps:

the method comprises the following steps: respectively weighing raw materials of an inner pipe layer, an intermediate pipe layer and an outer pipe layer, putting the raw materials of the inner pipe layer into a first extruder, putting the raw materials of the intermediate pipe layer into a second extruder, putting the raw materials of the outer pipe layer into a third extruder, and preparing the raw materials into molten plastics in the extruders;

step two: preparing an inner tube layer: the molten plastic extruded by the first extruder enters a first plastic pipe forming machine for forming, and then is cooled and formed to obtain an inner pipe layer;

step three: preparing an inner steel wire layer: feeding the inner pipe layer into a rotary cylinder of a winding device, pulling the inner pipe layer to move forwards by using a tractor, clockwise winding steel wires on the outer wall of the inner pipe layer by the winding device in the process of forward movement of the inner pipe layer, and then anticlockwise winding the steel wires to obtain an HDPE water pipe containing the inner steel wire layer;

step four: preparing an intermediate tube layer: feeding the molten plastic extruded by the second extruder into a second plastic pipe forming machine, feeding the HDPE water pipe containing the inner steel wire layer into the second plastic pipe forming machine, heating the inner pipe layer to be molten by using the second plastic pipe forming machine, wherein the melting temperature is 120-180 ℃, and meanwhile, the molten plastic in the second plastic pipe forming machine fills gaps on the inner steel wire layer to form a middle pipe layer so as to obtain the HDPE water pipe containing the middle pipe layer;

step five: preparing an outer steel wire layer: sending the HDPE water pipe containing the middle pipe layer into a rotating cylinder of a winding device, pulling the HDPE water pipe containing the middle pipe layer to move forwards by using a tractor, clockwise winding steel wires on the outer wall of the middle pipe layer by the winding device in the process that the HDPE water pipe containing the middle pipe layer moves forwards, and then anticlockwise winding the steel wires to obtain the HDPE water pipe containing the outer steel wire layer;

step six: preparing an outer tube layer: feeding the molten plastic extruded by the third extruder into a third plastic pipe forming machine, feeding the HDPE water pipe containing the outer steel wire layer into the third plastic pipe forming machine, heating the middle layer to be molten by using the third plastic pipe forming machine, wherein the melting temperature is 120-180 ℃, and meanwhile, the molten plastic in the third plastic pipe forming machine fills gaps on the outer steel wire layer to form an outer pipe layer, so as to obtain the HDPE water pipe containing the outer pipe layer;

step seven: and D, continuously drawing out the HDPE water pipe containing the outer pipe layer, which is prepared in the step six, by using a tractor to prepare a composite pipe containing two layers of steel wire meshes in an infinite length, namely the high-pressure-resistant HDPE water pipe.

2. The process of claim 1, wherein the outer pipe layer has a thickness of 0.5-2.0mm, the inner pipe layer has a thickness of 0.3-1.5mm, and the middle pipe layer has a thickness of 0.2-1.0 mm.

3. The processing technology of high pressure HDPE water pipe according to claim 1, wherein the inner steel wire layer and the outer steel wire layer are both made of stainless steel wires, and the diameter of the stainless steel wires is 0.1-0.5 mm.

4. The processing technology of the high pressure HDPE water pipe according to claim 1, wherein the inner pipe layer comprises the following raw materials in parts by weight: 50-60 parts of HDPE resin, 3-6 parts of silicon dioxide, 0.2-0.4 part of hematite, 0.3-0.5 part of calcium sulfate whisker, 0.3-0.5 part of wollastonite, 0.2-0.5 part of sodalite and 0.4-0.8 part of calcium carbonate.

5. The processing technology of the high pressure resistant HDPE water pipe according to claim 1, wherein the middle pipe layer comprises the following raw materials in parts by weight: 30-40 parts of HDPE resin, 0.2-1.1 parts of sorbitol and 3-8 parts of thermoplastic polyurethane elastomer.

6. The processing technology of the high pressure resistant HDPE water pipe according to claim 1, wherein the outer pipe layer comprises the following raw materials in parts by weight: 80-85 parts of HDPE resin, 5-10 parts of calcium carbonate, 1-5 parts of calcium stearate, 2-3 parts of nano-scale titanium dioxide, 1-2 parts of antioxidant, 0.5-0.8 part of phenyl o-hydroxybenzoate and 0.3-0.5 part of polyethylene wax.

7. The processing technology of the high-pressure-resistant HDPE water pipe according to claim 1, wherein the working process of the winding device for preparing the inner steel wire layer is as follows:

s1, preparing an inner steel wire layer: in the process that the inner pipe layer moves forwards, the wire winding device winds steel wires on the outer wall of the inner pipe layer clockwise through the second wire winding mechanism, and then winds the steel wires anticlockwise through the first wire winding mechanism to obtain the inner steel wire layer of the inner steel wire layer;

s2, counterclockwise winding the steel wire through the first winding mechanism: the inner pipe layer penetrates through the rear end of a rotating cylinder of the first winding mechanism, the front section of the rotating cylinder penetrates out of the inner pipe layer, a steel wire is pulled out of a steel wire outlet and fixed at the end part of the inner pipe layer through a screw, the inner pipe layer is pulled to move forwards through a tractor, a servo motor is started to drive a first belt pulley to rotate, the first belt pulley rotates to drive a second belt pulley to rotate through a belt, a first rotating shaft is driven to rotate, the first roller drives the rotating cylinder to rotate, the upper shell and the lower shell on the rotating cylinder do anticlockwise circular motion around the inner pipe layer, and the outer wall of the inner pipe layer moving forwards is wound with a layer of steel wire anticlockwise;

s3, the process of clockwise steel wire winding through the second winding mechanism is the same as the process of anticlockwise steel wire winding through the first winding mechanism, and the difference is that the rotation directions of servo motors in the second winding mechanism and the first winding mechanism are opposite;

s4, coil framework installation process: the coil skeleton that will twine to have the steel wire is placed inside last casing, penetrates the dead lever from one side ring plate middle part, passes the coil skeleton, wears out from the ring plate middle part of opposite side, fixes the dead lever, and the steel wire head on the coil skeleton is pulled out from the steel wire export on the casing down, and casing under the lock will go up the last mounting panel on the casing and connect with the lower mounting panel on the casing down through the bolt.

Technical Field

The invention relates to the field of production processes of HDPE water pipes, in particular to a processing process of a high-pressure-resistant HDPE water pipe.

Background

HDPE (high density polyethylene) pipes are supplied to the municipal pipe market of China at present, plastic pipes are steadily developed, PE pipes, PP-R pipes and UPVC (unplasticized polyvinyl chloride) pipes occupy a place, the strong development of the PE pipes is most remarkable, and the PE pipes are widely used, wherein water supply pipes and gas pipes are the two largest application markets.

The application number is CN201720811755.9 patent discloses a corrosion-resistant enhanced HDPE water supply pipe, the middle section of the water supply pipe sequentially comprises an anti-corrosion layer, a PE layer, an enhancement layer and an HDPE layer from inside to outside, the left section and the right section sequentially comprise the anti-corrosion layer, the PE layer, the enhancement layer, the HDPE layer and a steel ring layer from inside to outside, the left section and the right section of the water supply pipe are both provided with an annular groove, the enhancement layer is formed by bidirectionally and crossly winding a right spiral winding layer and a left spiral winding layer, one end of the water supply pipe is provided with two sliding grooves on the outer surface thereof, the two sliding grooves are axially and symmetrically distributed, the other end of the water supply pipe is provided with two sealing blocks matched with the sliding grooves on the inner surface thereof, the water supply pipe is provided with the anti-corrosion layer, the overall corrosion effect of the water supply pipe is improved, the enhancement layer is arranged, the service life of the whole water supply pipe is prolonged, but still has the following disadvantages: (1) the pipeline is easy to corrode and rust, poor in impact resistance, low in compressive strength and short in service life; (2) if protect the pipeline winding wire, current winding device can only carry out the wire winding of unidirectional side, protects the dynamics poor, if two directions all need to wind the wire and need use two machines to divide two steps to go on, and it is big to consume time, and work efficiency is low.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a processing technology of a high-pressure-resistant HDPE water pipe, which comprises the following steps: (1) by changing a single-layer HDPE water pipe into a five-layer HDPE water pipe with a composite structure, the chemical performance of the water pipe is improved through the raw materials of the water pipe, and the inner steel wire layer and the outer steel wire layer protect the inner wall and the outer wall of the water pipe, so that the problems that the existing pipeline is easy to corrode and rust, poor in impact resistance, low in compressive strength and short in service life are solved; (2) start servo motor, make rotatory section of thick bamboo be anticlockwise circular motion, make the water pipe outer wall through the tractor pulling forward motion hour hand winding steel wire, through second wire winding mechanism, first wire winding mechanism is clockwise the water pipe outer wall, anticlockwise winding steel wire, weave out the steel wire layer, protect the water pipe, wire winding device can carry out the steel wire winding process of two directions simultaneously, the wire winding that has solved current wire winding device and can only carry out the single direction, it is poor to protect the dynamics, if two directions all need twine the wire and need use two machines to divide two steps to go on, it is big to consume time, the problem that work efficiency is low.

The purpose of the invention can be realized by the following technical scheme:

the processing technology of the high-pressure-resistant HDPE water pipe comprises an inner pipe layer and an inner steel wire layer, wherein the outer surface of the inner pipe layer is coated with the inner steel wire layer, the outer surface of the inner steel wire layer is provided with a middle pipe layer, the outer surface of the middle pipe layer is coated with an outer steel wire layer, and the outer surface of the outer steel wire layer is provided with an outer pipe layer;

the processing technology of the high-pressure-resistant HDPE water pipe comprises the following steps:

the method comprises the following steps: weighing raw materials of an inner pipe layer, an intermediate pipe layer and an outer pipe layer in parts by weight, putting the raw materials of the inner pipe layer into a first extruder, putting the raw materials of the intermediate pipe layer into a second extruder, putting the raw materials of the outer pipe layer into a third extruder, and preparing the raw materials into molten plastics in the extruders;

step two: preparing an inner tube layer: the molten plastic extruded by the first extruder enters a first plastic pipe forming machine for forming, and then is cooled and formed to obtain an inner pipe layer;

step three: preparing an inner steel wire layer: feeding the inner pipe layer into a rotary cylinder of a winding device, pulling the inner pipe layer to move forwards by using a tractor, clockwise winding steel wires on the outer wall of the inner pipe layer by the winding device in the process of forward movement of the inner pipe layer, and then anticlockwise winding the steel wires to obtain an HDPE water pipe containing the inner steel wire layer;

step four: preparing an intermediate tube layer: feeding the molten plastic extruded by the second extruder into a second plastic pipe forming machine, feeding the HDPE water pipe containing the inner steel wire layer into the second plastic pipe forming machine, heating the inner pipe layer to be molten by using the second plastic pipe forming machine, wherein the melting temperature is 120-180 ℃, and meanwhile, the molten plastic in the second plastic pipe forming machine fills gaps on the inner steel wire layer to form a middle pipe layer so as to obtain the HDPE water pipe containing the middle pipe layer;

step five: preparing an outer steel wire layer: sending the HDPE water pipe containing the middle pipe layer into a rotating cylinder of a winding device, pulling the HDPE water pipe containing the middle pipe layer to move forwards by using a tractor, clockwise winding steel wires on the outer wall of the middle pipe layer by the winding device in the process that the HDPE water pipe containing the middle pipe layer moves forwards, and then anticlockwise winding the steel wires to obtain the HDPE water pipe containing the outer steel wire layer;

step six: preparing an outer tube layer: feeding the molten plastic extruded by the third extruder into a third plastic pipe forming machine, feeding the HDPE water pipe containing the outer steel wire layer into the third plastic pipe forming machine, heating the middle layer to be molten by using the third plastic pipe forming machine, wherein the melting temperature is 120-180 ℃, and meanwhile, the molten plastic in the third plastic pipe forming machine fills gaps on the outer steel wire layer to form an outer pipe layer, so as to obtain the HDPE water pipe containing the outer pipe layer;

step seven: and D, continuously drawing out the HDPE water pipe containing the outer pipe layer, which is prepared in the step six, by using a tractor to prepare a composite pipe containing two layers of steel wire meshes in an infinite length, namely the high-pressure-resistant HDPE water pipe.

As a further scheme of the invention: the thickness of the outer tube layer is 0.5-2.0mm, the thickness of the inner tube layer is 0.3-1.5mm, and the thickness of the middle tube layer is 0.2-1.0 mm.

As a further scheme of the invention: the inner steel wire layer and the outer steel wire layer are both made of stainless steel wires, and the diameter of each stainless steel wire is 0.1-0.5 mm.

As a further scheme of the invention: the inner pipe layer comprises the following raw materials in parts by weight: 50-60 parts of HDPE resin, 3-6 parts of silicon dioxide, 0.2-0.4 part of hematite, 0.3-0.5 part of calcium sulfate whisker, 0.3-0.5 part of wollastonite, 0.2-0.5 part of sodalite and 0.4-0.8 part of calcium carbonate.

As a further scheme of the invention: the middle tube layer comprises the following raw materials in parts by weight: 30-40 parts of HDPE resin, 0.2-1.1 parts of sorbitol and 3-8 parts of thermoplastic polyurethane elastomer.

As a further scheme of the invention: the outer tube layer comprises the following raw materials in parts by weight: 80-85 parts of HDPE resin, 5-10 parts of calcium carbonate, 1-5 parts of calcium stearate, 2-3 parts of nano-scale titanium dioxide, 1-2 parts of antioxidant, 0.5-0.8 part of phenyl o-hydroxybenzoate and 0.3-0.5 part of polyethylene wax.

As a further scheme of the invention: the working process of preparing the inner steel wire layer by the winding device is as follows:

s1, preparing an inner steel wire layer: in the process that the inner pipe layer moves forwards, the wire winding device winds steel wires on the outer wall of the inner pipe layer clockwise through the second wire winding mechanism, and then winds the steel wires anticlockwise through the first wire winding mechanism to obtain the inner steel wire layer of the inner steel wire layer;

s2, counterclockwise winding the steel wire through the first winding mechanism: the inner pipe layer penetrates through the rear end of a rotating cylinder of the first winding mechanism, the front section of the rotating cylinder penetrates out of the inner pipe layer, a steel wire is pulled out of a steel wire outlet and fixed at the end part of the inner pipe layer through a screw, the inner pipe layer is pulled to move forwards through a tractor, a servo motor is started to drive a first belt pulley to rotate, the first belt pulley rotates to drive a second belt pulley to rotate through a belt, a first rotating shaft is driven to rotate, the first roller drives the rotating cylinder to rotate, the upper shell and the lower shell on the rotating cylinder do anticlockwise circular motion around the inner pipe layer, and the outer wall of the inner pipe layer moving forwards is wound with a layer of steel wire anticlockwise;

s3, the process of clockwise steel wire winding through the second winding mechanism is the same as the process of anticlockwise steel wire winding through the first winding mechanism, and the difference is that the rotation directions of servo motors in the second winding mechanism and the first winding mechanism are opposite;

s4, coil framework installation process: the coil skeleton that will twine to have the steel wire is placed inside last casing, penetrates the dead lever from one side ring plate middle part, passes the coil skeleton, wears out from the ring plate middle part of opposite side, fixes the dead lever, and the steel wire head on the coil skeleton is pulled out from the steel wire export on the casing down, and casing under the lock will go up the last mounting panel on the casing and connect with the lower mounting panel on the casing down through the bolt.

The invention has the beneficial effects that:

(1) the invention relates to a processing technology of a high-pressure-resistant HDPE water pipe, the HDPE water pipe with a five-layer composite structure is reformed from a single-layer HDPE water pipe, calcium carbonate and calcium stearate as raw materials of the water pipe enable the water pipe to be resistant to corrosion of various corrosive media such as acid, alkali, salt and organic solvent, phenyl o-hydroxybenzoate increases the stability of the water pipe, the aging of the water pipe is prevented, silicon dioxide, nanoscale titanium dioxide, polyethylene wax improves the heat resistance of the water pipe (GB/T17391 and 1998), the chemical performance of the water pipe is improved, an inner steel wire layer and an outer steel wire layer which are arranged protect the inner wall and the outer wall of the water pipe, the compression strength of the HDPE water pipe (CB/T3616 and 2017) is improved, so that the HDPE water pipe is not easy to break, and has good impact resistance (GB/T19712 and 2005), the service life of the HDPE water pipe is prolonged; the HDPE water pipe can achieve the effect, a hydraulic test is carried out under the conditions of 80 ℃ and 4.5MPa, and the HDPE water pipe is not subjected to brittle failure within 300 h; can stably exist for 36-48h at 200 ℃; the bursting pressure is very high;

(2) according to the winding device, the water pipe penetrates into the rear end of the rotary cylinder of the second winding mechanism, the front section of the rotary cylinder penetrates out of the rotary cylinder, the steel wire is pulled out of the steel wire outlet on the second winding mechanism and is fixed at the end part of the water pipe through a screw, the water pipe is pulled to move forwards through a tractor, the servo motor is started to drive the first belt pulley to rotate, the first belt pulley rotates to drive the second belt pulley to rotate through the belt, the first rotary shaft is driven to rotate, the first roller drives the rotary cylinder to rotate, the upper shell and the lower shell on the rotary cylinder perform clockwise circular motion around the water pipe, and the outer wall of the water pipe moving forwards is wound with one layer of steel wire clockwise;

will clockwise twine the water pipe of one deck steel wire, through the slide, penetrate the water pipe from the rotatory section of thick bamboo rear end of first wire winding mechanism, the anterior segment is worn out, fix the steel wire that the steel wire export on the first wire winding mechanism was pulled out at the water pipe end, start servo motor, make rotatory section of thick bamboo be anticlockwise circular motion, make the water pipe outer wall anticlockwise winding one deck steel wire through the tractor pulling forward motion, through second wire winding mechanism, first wire winding mechanism is clockwise the water pipe outer wall, the anticlockwise steel wire that twines, weave out the steel wire layer, protect the water pipe, winding device can carry out the steel wire winding process of two directions simultaneously, the protection dynamics is good, wire-wound time has been saved, work efficiency is improved.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of a winding device according to the present invention;

FIG. 2 is a schematic structural diagram of a high pressure-resistant HDPE water pipe of the present invention;

FIG. 3 is a schematic view of a first winding mechanism according to the present invention;

FIG. 4 is a schematic view of the assembly of the vertical plate and the supporting platform of the present invention;

FIG. 5 is a schematic view of the assembly of the upper and lower housings of the present invention;

FIG. 6 is a schematic view showing the internal structure of the upper and lower cases according to the present invention;

FIG. 7 is a side view of the present invention at a rotary drum;

FIG. 8 is a schematic view showing the assembly of the rotary drum, the first roller and the second roller in the present invention.

In the figure: 101. an inner tube layer; 102. an inner wire layer; 103. an intermediate tube layer; 104. an outer wire layer; 105. an outer tube layer; 106. a steel wire; 1. a first winding mechanism; 100. a second winding mechanism; 2. an upper housing; 3. a lower housing; 4. a first support column; 5. a first bearing; 6. a second support column; 7. a rotary drum; 8. a second bearing; 9. a vertical plate; 10. a first roller; 11. a servo motor; 12. a first pulley; 13. a support table; 14. a slideway; 15. a second pulley; 16. a first rotating shaft; 17. a third bearing; 18. a second roller; 19. a second rotating shaft; 20. an upper mounting plate; 21. a lower mounting plate; 22. a steel wire outlet; 23. a groove; 24. a hinge; 25. fixing the rod; 26. a circular ring plate; 27. and a coil framework.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.