阅读说明：本技术 一种孔网钢塑管道的制备方法 (Preparation method of mesh steel-plastic pipeline ) 是由 彭小峰 林强 代小勇 于 2020-11-24 设计创作，主要内容包括：本发明提供一种孔网钢塑管道的制备方法,其能够制作出环刚度更高,抗内压和耐腐蚀性更强的孔网钢塑管道,包括如下步骤：将放卷架上的钢带带材穿过冲压设备,冲压设备上设置有冲压模具,将钢带带材均匀冲孔后收卷待用；制备孔网钢塑复合管壁：制备出的孔网钢带通过上下凹凸压辊将孔网钢带压制成截面为U型或者V型的钢带,然后将压制后的孔网钢带弯曲成圆形；开启挤出机并挤出内层料片,待内层料片与牵引滚筒缠绕一圈后,再与内层出料的料坯粘粘重合；然后在将钢带牵引绳缠绕牵引滚筒1-2圈,拉动钢带牵引绳,让孔网钢带绕内层料片同步缠绕；启动外层料片挤出机,将外层料片复合在钢带上,使用压轮将外层料片、内层料片和孔网钢带粘粘复合。(The invention provides a preparation method of a mesh steel-plastic pipeline, which can be used for preparing the mesh steel-plastic pipeline with higher ring rigidity and stronger internal pressure resistance and corrosion resistance, and comprises the following steps: the steel belt strip on the unreeling frame passes through a stamping device, a stamping die is arranged on the stamping device, and the steel belt strip is uniformly punched and then coiled for standby; preparing a mesh steel-plastic composite pipe wall: pressing the prepared meshed steel strip into a steel strip with a U-shaped or V-shaped section through upper and lower concave-convex press rollers, and then bending the pressed meshed steel strip into a circle; starting the extruder and extruding the inner layer material sheet, and after the inner layer material sheet and the traction roller are wound for a circle, adhering and overlapping the inner layer material sheet and the material blank discharged from the inner layer; then winding the steel belt traction rope around the traction roller for 1-2 circles, pulling the steel belt traction rope, and synchronously winding the steel belt of the mesh around the inner layer material sheet; and starting the outer material sheet extruder, compounding the outer material sheet on the steel belt, and adhering and compounding the outer material sheet, the inner material sheet and the meshed steel belt by using a pressing wheel.)

1. The preparation method of the mesh steel-plastic pipeline is characterized by comprising the following steps of:

s1: punching a steel belt: the steel belt strip on the unreeling frame passes through a stamping device, a stamping die is arranged on the stamping device, and the steel belt strip is uniformly punched and then coiled for standby;

s2, preparing a mesh steel-plastic composite pipe wall:

s21: pressing the meshed steel strip prepared in the step (1) into a steel strip with a U-shaped or V-shaped section through upper and lower concave-convex press rollers, and then bending the pressed meshed steel strip into a circle;

s22, starting the extruder and extruding an inner layer material sheet, and after the inner layer material sheet and the traction roller are wound for a circle, adhering and overlapping the inner layer material sheet and the material blank discharged from the inner layer;

s23, winding the steel belt traction rope around the traction roller for 1-2 circles, and starting the forming machine, the bending machine, the feeding machine and the high-frequency heater after the inner wall is formed; the temperature of the high-frequency heater is 90-110 ℃;

s24: pulling the steel belt traction rope to synchronously wind the meshed steel belt around the inner layer material sheet;

s25: and starting an outer-layer material sheet extruder, compounding the outer-layer material sheet on the steel belt, penetrating the material blank discharged from the outer layer into the punched holes on the steel belt, and bonding and compounding the outer-layer material sheet, the inner-layer material sheet and the meshed steel belt by using a pressing wheel.

2. The method for preparing the meshed steel-plastic pipe according to claim 1, wherein S21 further comprises the following steps: when the mesh steel belt passes through the forming machine and the bending machine, the heights of the lower rollers and the lower channels of the forming machine and the bending machine are parallel and level, then the upper rollers and the upper channels of the forming machine and the bending machine are horizontally and transversely adjusted to be symmetrical in sequence, and the symmetry degree is less than or equal to 0.5 mm.

3. The method for preparing the meshed steel-plastic pipe according to claim 1, wherein S21 further comprises the following steps: when the steel belt is hard, the second group of rollers is integrally adjusted upwards, and the third group of rollers moves upwards; when the steel belt is softer, the second group of rollers is integrally adjusted downwards, and the third group of rollers moves downwards; the height of each adjustment of the second group of rollers does not exceed 0.5 mm; the height of each adjustment of the third group of rollers does not exceed 0.8 mm.

4. The method for manufacturing a meshed steel-plastic pipe according to claim 1, wherein a line speed of the forming machine is 10% -40% slower than a line speed of the bending machine.

5. The method for manufacturing a meshed steel-plastic pipe according to claim 1, wherein the temperature of the blank discharged from the outer layer is as follows: 200-220 ℃.

Technical Field

The invention relates to the field of corrugated pipe manufacturing, in particular to a preparation method of a mesh steel-plastic pipeline.

Background

The corrugated pipe is named as a corrugated pipe, the surface of the corrugated pipe is a concave-convex shell, the corrugated pipe is called as a corrugated pipe just like a channel of corrugation, and the corrugated pipe has the properties of softness, folding and expansion, and is widely applied to engineering equipment such as chemical engineering, electronics, electric power, civil engineering, aerospace and the like at present, and has the effects of sealing, isolating, reducing noise, draining water and the like.

The raw materials are mostly made of some high-density polyethylene (HDPE) plastics, the material has strong corrosion resistance and very long service life, and the prepared polyethylene plastics and some additives are put together and sent into a machine to be fully stirred and mixed in the production process. The raw materials after stirring and mixing are sent into an extruder, the raw materials are heated to 230 ℃ at high temperature, so that plastic particles are melted and then extrude viscous liquid, a forming die of the corrugated pipe is composed of hundreds of pairs of left and right separated modules, and the corrugated pipe can be continuously manufactured by circularly closing and opening each pair of modules. The extruder head stretches into the die cavity, the forming cavity of the corrugated pipe is formed along with the closing of each group of dies, the extruder injects molten polyethylene plastic into the dies, the solution can be rapidly filled into the grains, the corrugated pipe can be hardened and formed along with the forward movement of the dies by a cooling system, each pair of dies can be automatically opened for demolding, the dies move forward to continue to circularly form the corrugated pipe, the corrugated pipe after demolding is formed, the plastic is completely hardened by water cooling spraying, and the long corrugated pipe can be continuously increased.

The bellows used in the prior art is made of pure polyethylene plastic, which has insufficient internal pressure and rigidity resistance and poor corrosion resistance, resulting in short service life of the pipe.

Disclosure of Invention

The invention aims to provide a preparation method of a mesh steel-plastic pipeline, which can be used for preparing the mesh steel-plastic pipeline with higher ring rigidity and stronger internal pressure resistance and corrosion resistance.

The embodiment of the invention is realized by the following steps:

a preparation method of a mesh steel-plastic pipeline comprises the following steps:

s1: punching a steel belt: the steel belt strip on the unreeling frame passes through a stamping device, a stamping die is arranged on the stamping device, and the steel belt strip is uniformly punched and then coiled for standby;

s2, preparing a mesh steel-plastic composite pipe wall:

s21: pressing the meshed steel strip prepared in the step (1) into a steel strip with a U-shaped or V-shaped section through upper and lower concave-convex press rollers, and then bending the pressed meshed steel strip into a circle;

s22, starting the extruder and extruding the inner layer material sheet, and after the inner layer material sheet and the traction roller are wound for a circle, adhering and overlapping the inner layer material sheet and the material blank discharged from the inner layer;

s23, winding the steel belt traction rope around the traction roller for 1-2 circles, and starting the forming machine, the bending machine, the feeding machine and the high-frequency heater after the inner wall is formed; the temperature of the high-frequency heater is 90-110 ℃;

s24: pulling a steel belt traction rope to synchronously wind the mesh steel belt around the inner layer material sheet;

s25: and starting the outer-layer material sheet extruder, compounding the outer-layer material sheets on the steel belt, penetrating the material blank discharged from the outer layer into the punched holes on the steel belt, and bonding and compounding the outer-layer material sheets, the inner-layer material sheets and the meshed steel belt by using a pressing wheel.

In a preferred embodiment of the present invention, the step S21 further includes the following steps: when the mesh steel strip passes through the forming machine and the bending machine, the lower rollers and the lower channels of the forming machine and the bending machine are level, then the upper rollers and the upper channels of the forming machine and the bending machine are horizontally and transversely adjusted to be symmetrical in sequence, and the symmetry degree is less than or equal to 0.5 mm.

In a preferred embodiment of the present invention, the step S21 further includes the following steps: when the steel belt is hard, the second group of rollers is integrally adjusted upwards, and the third group of rollers moves upwards; when the steel belt is softer, the second group of rollers is integrally adjusted downwards, and the third group of rollers moves downwards; the height of each adjustment of the second group of rollers does not exceed 0.5 mm; the height of each adjustment of the third group of rollers does not exceed 0.8 mm.

In the preferred embodiment of the present invention, the line speed of the former is 10% to 40% slower than the line speed of the bender.

In a preferred embodiment of the invention, the temperature of the preform discharged from the outer layer is: 200-220 ℃.

The embodiment of the invention has the beneficial effects that: the wall pipe with the mesh steel-plastic structure manufactured by the method in the technical scheme is used for water supply and drainage, gas pipes and the like, the ring stiffness is higher, the internal pressure is resisted, the steel belt and plastic are in permeable adhesion, the adhesion performance is better, the pipeline caliber is large, the corrosion resistance is strong, the production operation is simple, and the practicability is high.

Detailed Description

The terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, 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.

First embodiment

The embodiment provides a preparation method of a mesh steel-plastic pipeline, which comprises the following steps:

s1: punching a steel belt: the steel belt strip on the unreeling frame passes through a stamping device, a stamping die is arranged on the stamping device, and the steel belt strip is uniformly punched and then coiled for standby; in the embodiment, a steel strip passes through a unreeling frame and a stamping device, a die consists of an upper die frame, an upper backing plate, an upper die plate, a scraping die plate, a stamping pin, a lower die plate, a die core, a lower backing plate and a lower die frame, the upper die plate and the lower die plate are guided by 2 ball guide shafts, holes are uniformly punched, and finally the steel strip is reeled for standby use and is compounded with a pipe and plastic;

s2, preparing a mesh steel-plastic composite pipe wall:

s21: pressing the meshed steel strip prepared in the step (1) into a steel strip with a U-shaped or V-shaped section through upper and lower concave-convex press rollers, and then bending the pressed meshed steel strip into a circle; in the embodiment, the forming device is adjusted, so that the meshed steel strip is pressed into a U or V shape through upper and lower concave-convex press rollers, and the rear bending device is adjusted to round the steel strip into a circle with a diameter equivalent to the diameter of the circle;

s22, starting the extruder and extruding the inner layer material sheet, and after the inner layer material sheet and the traction roller are wound for a circle, adhering and overlapping the inner layer material sheet and the material blank discharged from the inner layer; in the embodiment, the main machine is started to extrude an inner layer material sheet, the inner layer material sheet is wound by one circle and is adhered and overlapped with a material blank discharged from the inner layer, then a steel belt traction rope is wound around a traction roller for one to two circles, and after the inner wall is formed, a forming machine, a bending machine, a feeding machine and a high-frequency heater are started and operated; when the inner layer material sheet is extruded, the waveform of the coated steel strip is kept smooth, and basically no folds or very shallow and very slow folds are formed; the coated steel strip is required to have no peeling and stripping; when the steel strip is adhered, the adhesion of the steel strip is reliable; the joint welding of the steel strip must be firmly welded;

s23, winding the steel belt traction rope around the traction roller for 1-2 circles, and starting the forming machine, the bending machine, the feeding machine and the high-frequency heater after the inner wall is formed; the temperature of the high-frequency heater is 90-110 ℃; in the present embodiment, the temperature (90 ℃ to 110 ℃) of the coating enhancement ring is adjusted by setting a high-frequency current;

s24: pulling a steel belt traction rope to synchronously wind the mesh steel belt around the inner layer material sheet;

s25: and starting the outer-layer material sheet extruder, compounding the outer-layer material sheets on the steel belt, penetrating the material blank discharged from the outer layer into the punched holes on the steel belt, and bonding and compounding the outer-layer material sheets, the inner-layer material sheets and the meshed steel belt by using a pressing wheel.

S21 in this embodiment specifically includes the following steps: starting a winding machine to tightly wind the steel strip on the winding wheel disc; meanwhile, the production speeds of the forming machine, the bending machine, the feeding machine, the winding machine and the pipe feeding machine are matched with each other, and the forming linear speed is 10-40% slower than the bending linear speed; the formed steel strip needs to maintain proper and stable tension; setting the production speeds of the forming machine, the bending machine, the feeding machine, the winding machine and the pipe feeding machine according to the process card; adjusting the inclination of the die and the large roller according to the standard size and the required ring rigidity to determine the screw pitch of the pipe; when the mesh steel strip passes through the forming machine and the bending machine, the lower rollers and the lower channels of the forming machine and the bending machine are level, then the upper rollers and the upper channels of the forming machine and the bending machine are horizontally and transversely adjusted to be symmetrical in sequence, and the symmetry degree is less than or equal to 0.5 mm. In this embodiment, the upper and lower rollers of the moving bender must follow the same distance from the left and right sides;

in this embodiment, the second and third sets of rollers of the bending machine are adjusted up and down according to the hardness of the steel strip. S21 further includes the steps of: when the steel belt is hard, the second group of rollers is integrally adjusted upwards, and the third group of rollers moves upwards; when the steel belt is softer, the second group of rollers is integrally adjusted downwards, and the third group of rollers moves downwards; the height of each adjustment of the second group of rollers does not exceed 0.5 mm; the height of the third group of rollers adjusted each time is not more than 0.8 mm, so that the bending effect of the steel strip is ensured, and the forming bending system is prevented from being damaged.

In the preferred embodiment of the present invention, the line speed of the former is 10% to 40% slower than the line speed of the bender. The temperature of the blank discharged from the outer layer is as follows: 200-220 ℃.

The method of extruding the outer layer web and the inner layer web in this example includes: checking that the raw materials conform to the production requirements, and starting a feeding machine to enable a hopper of the extruder to be filled with the raw materials; firstly, starting a main motor, setting specific parameters according to a process parameter table after the preheating temperature and the heat preservation time are reached, and starting an extruder after the set temperature is reached so that a molten material is extruded from an extrusion die; slowly increasing the speed of the motor; the rotation speed of the main motor was increased to 10rpm, and the plasticization of the raw material was observed. After the inner layer of the winding pipe is well formed, starting the winding machine, and slowly adjusting to enable the winding machine to be matched with the rotating speed of the main motor; and (4) observing whether the temperature and the pressure of the melt are abnormally changed or not at all times, and matching the rotating speed of the main machine with the rotating speed of the winding machine.

In conclusion, the wall pipe with the mesh steel-plastic structure manufactured by the method in the technical scheme is used for water supply and drainage, gas pipes and the like, has higher ring rigidity and internal pressure resistance, is bonded with plastics in a penetrating way, has better bonding property, large pipeline caliber, strong corrosion resistance, simple production operation and strong practicability.

This description describes examples of embodiments of the invention, and is not intended to illustrate and describe all possible forms of the invention. It should be understood that the embodiments described in this specification can be implemented in many alternative forms. Specific structural and functional details disclosed are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention. The described combination of features provides a representative embodiment for a typical application. However, various combinations and modifications of the features consistent with the teachings of the present invention may be used as desired for particular applications or implementations.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.