CN114131877A - Production equipment and production method for ultrathin polyethylene pipeline - Google Patents
Production equipment and production method for ultrathin polyethylene pipeline Download PDFInfo
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- CN114131877A CN114131877A CN202111337360.7A CN202111337360A CN114131877A CN 114131877 A CN114131877 A CN 114131877A CN 202111337360 A CN202111337360 A CN 202111337360A CN 114131877 A CN114131877 A CN 114131877A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/355—Conveyors for extruded articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/87—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses production equipment and a production method of an ultrathin polyethylene pipeline, wherein the device comprises a cooling spraying device, a supporting structure, an extruder, a sizing sleeve, a plurality of roller ring assemblies and a tractor, the supporting structure is divided into a semi-fusiform front section and a tubular rear section in appearance, and the head of the semi-fusiform front section is connected with the extruder through a steel rope; when the pipe is pulled backwards, the inner wall of the pipe is in contact with the outer wall of the supporting structure and drives the supporting structure to move backwards until the head of the supporting structure is tightened with a steel rope connected with the extruder, the supporting structure is just positioned between an upper crawler belt and a lower crawler belt of the tractor, and the supporting structure can provide enough supporting force for the pipe and prevent the pipe from deforming in the pulling process; the gyro wheel ring subassembly is used for providing the spacing effect that rolls to the trailing tubular product outer wall, prevents that tubular product from taking place deformation. The production equipment provided by the invention can realize extrusion of an ultra-thin polyethylene pipeline of SDR100, optimizes the whole production process and prevents the deformation of the pipe in the shaping, cooling and drawing processes.
Description
Technical Field
The invention relates to production equipment and a production method of an ultrathin polyethylene pipeline.
Background
The polyethylene plastic pipeline has wide application range, covers various fields of production and life, has different requirements in different fields, and has different requirements on the specification and the size of the polyethylene pipeline. Among them, the polyethylene pipe used for lining the steel pipe requires a large pipe size and a small wall thickness.
However, the existing production equipment on the market can not produce ultrathin pipelines with SDR reaching 100 due to the technical limitations of the processes such as extrusion, cooling, traction and the like when producing pipelines. On the other hand, even if extrusion is possible, the produced product is severely deformed and cannot be normally used.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to provide production equipment and a production method for an ultrathin polyethylene pipeline.
The production equipment of the ultrathin polyethylene pipeline comprises a cooling spraying device, a supporting structure, an extruder, a sizing sleeve, a plurality of roller ring assemblies and a tractor, wherein the extruder, the sizing sleeve and the roller ring assemblies are sequentially arranged from left to right; when the pipe is pulled backwards, the pipe is slightly deformed inwards and sleeved outside the supporting structure, the inner wall of the pipe is in contact with the outer wall of the supporting structure and drives the supporting structure to move backwards, when the head of the supporting structure is tightened with a steel rope connected with the extruder, the supporting structure is positioned between an upper crawler and a lower crawler of the tractor, the upper crawler and the lower crawler of the tractor clamp the outer wall of the pipe, and the supporting structure is used for providing enough supporting force for the pipe and preventing the pipe from deforming in the pulling process; the roller ring assembly is arranged in a spraying area of the cooling spraying device and used for providing rolling limiting effect on the outer wall of the backward-pulled pipe, and deformation of the pipe is prevented.
Furthermore, the supporting structure is an anti-deformation bracket, the anti-deformation bracket comprises a supporting beam and a shell arranged on the supporting beam, a plurality of groups of supporting brackets are arranged along the length direction of the supporting beam, each group of supporting brackets comprises at least 3 supporting brackets arranged on the periphery of the supporting beam, one end of each supporting bracket, far away from the supporting beam, is fixedly connected with the inner wall of the shell, and the supporting brackets are fixedly supported between the shell and the supporting beam; one end of the supporting beam penetrates out of the head of the shell and is connected with a steel rope, and the other end of the steel rope penetrates through the roller ring assembly and the sizing sleeve and is connected to the extruder; the shell surface is smooth, and the shell anterior segment is half fusiformis, and the shell back end is the tubulose, and when tubular product was extruded, the half fusiformis of shell head can make things convenient for tubular product to wear to establish in the shell outside, and the tubular outer wall cooperation contact of tubular outer wall of shell back end can be followed to the tubular product inner wall.
Furthermore, the shell, the supporting bracket and the supporting beam are all made of aluminum alloy materials.
Furthermore, an extrusion die head is connected to a machine barrel of the extruder, the extrusion die head comprises a core die, a neck die and an annular material flow channel arranged between the core die and the neck die, an outlet of the annular material flow channel is connected with a sizing sleeve, a cooling sleeve is arranged on the outer side of the neck die close to the outlet end of the neck die, an annular cooling flow channel is arranged inside the cooling sleeve, and a water inlet and a water outlet which are used for being connected with the annular cooling flow channel are arranged on the cooling sleeve, so that cooling liquid can be introduced into the cooling sleeve to cool and shape the extruded pipe in advance.
Furthermore, a lifting ring is arranged on a core die of the extrusion die head, and one end of the steel rope is connected with the lifting ring.
Furthermore, the roller ring assembly comprises a roller ring and 3 rollers which are uniformly arranged on the inner side of the roller ring at intervals, the 3 rollers arranged on the inner side of the roller ring are respectively positioned at three vertexes of a virtual equilateral triangle, the rollers are of a central symmetrical structure with thick ends and thin middle parts and the thickness gradually reduced from the two ends to the middle part, and the cross section of one side of each roller is in an arc shape matched with the outer wall of the pipe; when tubular product penetrated the gyro wheel ring inboard, tubular product was followed the central zone of 3 gyro wheels passes, and all gyro wheels inboard of gyro wheel ring all contact with the cooperation of tubular product outer wall, provide limiting displacement to towed tubular product backward, and towed tubular product drives the gyro wheel backward and takes place to roll.
Furthermore, roller ring is last evenly to be equipped with 3 screw holes at the interval, and every screw hole is gone up a cooperation threaded connection bracing piece, and the other end of bracing piece cooperates a support frame of threaded connection, rotates on the support frame and connects a gyro wheel.
Further, cooling spray set sprays the pipe network including the cooling, and the cooling spray pipe network can spray the cooling water column of crisscross arrangement, and when tubular product passed through in cooling spray set's the spray region, the cooling water column sprayed the tubular product surface with 5~10 entrance angle and cools off.
The production method of the production equipment for the ultrathin polyethylene pipeline comprises the following steps:
1) the method comprises the steps of drying polyethylene raw materials, feeding the dried polyethylene raw materials into an extruder, heating and plasticizing the polyethylene raw materials by using a machine barrel and an extrusion die head of the extruder, extruding and molding the polyethylene raw materials through an annular material flow channel between the core die and a neck ring of the extrusion die head, and meanwhile, in order to prevent the difficult shaping and deformation of a pipeline after extrusion, introducing cooling liquid into a cooling sleeve on the outer side of the neck ring, and performing advanced cooling shaping of pipe extrusion;
2) when the pipe is extruded from the extrusion die head, the steel rope is naturally positioned in the pipe, the pipe extruded from the extrusion die head moves backwards under the traction action of a traction machine, and the pipe firstly enters a sizing sleeve for vacuum cooling sizing;
3) the vacuum-cooled and sized pipe enters a spraying area of a cooling spraying device, a cooling spraying pipe network sprays cooling water columns which are distributed in a staggered mode, and the cooling water columns are sprayed to the outer surface of the pipe at an entrance angle of 5-10 degrees for cooling, so that the impact force of water flow is reduced, and the deformation of the pipe is further prevented; meanwhile, in the process that the pipe moves backwards in the spraying area of the cooling spraying device, the pipe also penetrates into the inner side of the roller ring assembly and is in matched contact with the roller, and the pipe pulled backwards drives the roller to roll;
in the process that the pipe continues to move backwards, the anti-deformation bracket is integrally coated inside the pipe, the inner wall of the pipe is in matched contact with the tubular outer wall of the rear section of the shell of the anti-deformation bracket, and in the process that the pipe moves backwards under the traction action of the tractor, the anti-deformation bracket provides supporting force inside the pipe to prevent the pipe from deforming in the traction process, and at the moment, the steel rope is tightened inside the pipe;
4) after the tube is pulled, it is cut.
Compared with the prior art, the invention has the following beneficial effects:
1) by utilizing the ultrathin polyethylene pipeline production equipment disclosed by the invention, the extrusion of the ultrathin polyethylene pipeline of SDR100 can be realized, the whole production process is optimized, and the deformation of the pipe in the shaping, cooling and drawing processes is prevented.
2) The cooling sleeve is arranged on the outer side of the neck ring mould close to the outlet end of the neck ring mould, and the local cooling technology of the end part of the neck ring mould is adopted, so that the fast forming of the extruded pipe is facilitated, and the deformation of the pipe is prevented. The ultra-thin polyethylene pipeline can be extruded easily;
3) according to the invention, the roller ring assembly is adopted, when the pipe penetrates into the inner side of the roller ring, all rollers on the inner side of the roller ring are respectively attached to the outer surface of the pipe and respectively roll, and rolling friction replaces sliding friction, so that the scratch defect on the surface of the pipe can be reduced, the friction resistance is reduced, and the production efficiency is improved. In addition, the deformation of the ultrathin polyethylene pipeline can be further prevented under the auxiliary action of the roller ring assembly.
4) The invention adopts an inner support traction structure (namely the anti-deformation bracket provides a supporting force in the pipe), and can effectively prevent the deformation of the pipe caused by the traction process.
Drawings
FIG. 1 is a schematic view of an extrusion die head of an extruder;
FIG. 2 is a schematic cross-sectional view of an extrusion die;
FIG. 3 is a schematic view of the construction of the roller ring assembly of the present invention;
FIG. 4 is a schematic perspective view of the deformation preventing bracket according to the present invention;
fig. 5 is a front view of the deformation preventing bracket of the present invention;
FIG. 6 is a schematic cross-sectional view illustrating the deformation preventing bracket according to the present invention;
in the figure: 1-neck mold, 2-cooling jacket, 21-water inlet, 2-2 annular cooling flow channel, 3-hoisting ring, 4-roller ring, 5-roller, 6-pipe, 7-anti-deformation bracket, 7-1 shell, 7-2 support bracket and 7-3 support beam.
Detailed Description
The present invention is further illustrated by the following examples, which should not be construed as limiting the scope of the invention.
Example (b): compare FIGS. 1-6
The utility model provides an ultra-thin polyethylene pipeline production facility, includes cooling spray set, bearing structure and from a left side to right extruder, sizing cover that set gradually, a plurality of gyro wheel ring subassemblies and the tractor that set up in even interval on the same straight line, the tractor is including last track and the lower track that is used for driving tubular product tractive backward. Bearing structure's appearance divide into half fusiformis anterior segment and tubulose back end, the head of half fusiformis anterior segment is connected with and connects on the extruder after the other end of steel cable passes gyro wheel ring subassembly and sizing cover, when tubular product pulls backward, tubular product inwards slightly deforms and the cover is established in bearing structure's outside, the contact of tubular product inner wall and bearing structure's outer wall, drive bearing structure rearward movement through the effect of friction, when the steel cable that bearing structure head and extruder link to each other was tight, bearing structure just is located between the upper and lower track of tractor, the upper and lower track of tractor presss from both sides tightly the tubular product outer wall simultaneously, thereby conveniently pull backward to tubular product drive, whole in-process bearing structure can provide sufficient holding power for tubular product, prevent tubular product deformation at the traction in-process. The roller ring assembly is arranged in a spraying area of the cooling spraying device and used for providing rolling limiting effect on the outer wall of the backward-pulled pipe, and deformation of the pipe is prevented.
In actual work, in order to increase the coating traction effect of the upper and lower crawler belts of the tractor on the pipe, arc-shaped grooves matched with the pipe in shape can be formed in the corresponding surfaces of the upper and lower crawler belts. For example, in chinese patent No. cn202021180117.x, it sets up the recess on the track surface, increases the area of contact between tubular product and upper and lower track through the recess, reduces the extrusion force and too concentrates on tubular product upper and lower both ends, reduces the damage to tubular product.
The machine barrel of the extruder is connected with an extrusion die head, the extrusion die head comprises a core die, a mouth die 1 and an annular material flow passage arranged between the core die and the mouth die 1, and the outlet of the annular material flow passage is connected with a sizing sleeve. The outer side of the neck ring mold 1 close to the outlet end thereof is provided with a cooling jacket 2, an annular cooling flow channel 2-2 is arranged inside the cooling jacket 2, and the cooling jacket 2 is provided with a water inlet 21 and a water outlet so as to introduce cooling liquid into the annular cooling flow channel of the cooling jacket 2 and cool and shape the extruded pipe in advance.
The gyro wheel ring subassembly includes gyro wheel ring 4 and even interval sets up 3 gyro wheels 5 at gyro wheel ring 4 inboards, and the gyro wheel ring subassembly is used for providing the limiting displacement that rolls through 3 gyro wheels 5 to towed tubular product backward, prevents that tubular product from taking place deformation. In a comparison graph of fig. 3, in the structure of each roller ring assembly, 3 rollers 5 are arranged on the inner side of a roller ring 4, and the 3 rollers 5 are respectively located at three vertexes of a virtual equilateral triangle, when a pipe 6 penetrates into the inner side of the roller ring 4, the pipe passes through the central areas of the 3 rollers 5, and the 3 rollers 5 respectively contact the outer surface of the pipe 6 and roll. The appearance of gyro wheel 5 is thin in the middle of the both ends is thick and by the central symmetrical structure of the gentle reduction of thickness in the middle of both ends, and a side cross-section of gyro wheel 5 is the arc that matches with the tubular product outer wall (the radian of 5 lateral parts of gyro wheel matches with the tubular product outer wall radian of extruding promptly), and when tubular product 6 penetrated roller ring 4 inboard, all gyro wheels 5 of roller ring 4 inboard all contacted with tubular product outer wall cooperation, and pull behind tubular product 6 drive gyro wheel 5 and take place to roll.
Further, in a comparison graph 3, 3 threaded holes are uniformly formed in the roller ring 4 at intervals, each threaded hole is connected with a support rod in a matched threaded mode, the other end of each support rod is connected with a support frame in a matched threaded mode, and a roller 5 is rotatably connected to one support frame. The length of the supporting rod between the supporting frame and the roller ring 4 can be adjusted through threads so as to adapt to pipes with different calibers. The invention adopts the roller 5 at the inner side of the support frame, replaces sliding friction with rolling friction, can reduce the scratch defect on the surface of the pipe, reduces the friction resistance and improves the production efficiency.
The cooling spray device comprises a cooling spray pipe network, the cooling spray pipe network can spray cooling water columns which are arranged in a staggered mode, and when the pipe passes through a spray area of the cooling spray device, the cooling water columns spray the outer surface of the pipe at an entrance angle of 5-10 degrees to cool. The cooling section of the invention adopts a water cooling mode to cool the pipe, and the concentrated water column can also have certain influence on the out-of-roundness of the pipe due to the small thickness of the pipe. Therefore, the cooling section water columns are arranged in a staggered mode, and are sprayed to the surface of the pipe at a small incidence angle (5-10 degrees) for cooling, so that the impact force of water flow is reduced, and the deformation of the pipe can be further prevented.
The support structure of the invention adopts the anti-deformation bracket 7, and the anti-deformation bracket 7 can play a role in limiting when supporting and guiding the pipe, thereby effectively preventing the pipe from deforming. The whole anti-deformation bracket 7 is made of aluminum alloy, the weight is light, the whole surface is smooth, and the shape of the head of the anti-deformation bracket is similar to a half shuttle shape.
Referring to fig. 4-6, the anti-deformation bracket 7 comprises a supporting beam 7-3 and a housing 7-1 arranged on the supporting beam 7-3, one end of the supporting beam 7-3 penetrates out of the head of the housing 7-1 and is connected with a steel rope, and the other end of the steel rope penetrates through a roller ring 4 and a sizing sleeve of the roller ring assembly and is connected with a core mold of the extrusion die head; the surface of the shell 7-1 is smooth, the front section of the shell 7-1 is in a half-fusiform shape, the rear section of the shell 7-1 is in a tubular shape, when a pipe is extruded, the half-fusiform shape of the head of the shell 7-1 can facilitate the pipe to penetrate through the outer side of the shell 7-1, and the inner wall of the pipe can be in matched contact with the tubular outer wall of the rear part of the shell 7-1. A plurality of groups of supporting brackets 7-2 are arranged along the length direction of the supporting beam 7-3, each group of supporting brackets 7-2 comprises at least 3 supporting brackets arranged on the periphery of the supporting beam 7-3, and one end of each supporting bracket, far away from the supporting beam 7-3, is fixedly connected with the inner wall of the shell 7-1, so that the supporting brackets are fixedly supported between the shell 7-1 and the supporting beam 7-3. The shell 7-1, the supporting bracket 7-2 and the supporting beam 7-3 are all made of aluminum alloy materials.
When the tubular product is extruded, the cable wire is naturally located inside the tubular product, and along with the continuous movement of tubular product to equipment rear portion, when moving to the traction section (moving between the last track and the lower track of tractor promptly), because anti-deformation bracket 7 is fusiform and the surface is smooth, tubular product is at the in-process of backward motion, and naturally including anti-deformation bracket 7. Then in the subsequent stable operation process, the steel rope is tightened in the pipe, the anti-deformation bracket 7 arranged between the upper crawler belt and the lower crawler belt is arranged in the pipe in a penetrating mode in a matching mode to provide supporting force for the pipe, and meanwhile the upper crawler belt and the lower crawler belt are respectively pressed on the outer walls of the upper side and the lower side of the pipe, so that the pipe can be further prevented from being deformed in the traction process.
In the comparison of fig. 1 and fig. 2, a lifting ring 3 is arranged on a core mould of the extrusion die head, and one end of a supporting beam 7-3 is connected with the lifting ring 3 through a steel rope.
The method for producing the ultrathin polyethylene pipeline by adopting the production equipment comprises the following steps:
1) the polyethylene raw materials are dried and then fed into the extruder, the extruder barrel and the extrusion die head of the extruder are used for heating and plasticizing the polyethylene raw materials, the polyethylene raw materials are extruded and molded through an annular material flow channel between the core die of the extrusion die head and the neck ring die 1, meanwhile, in order to prevent the pipe from being extruded and molded, the thickness of the pipe is uneven, even the broken opening condition occurs, cooling liquid is introduced into an annular cooling flow channel of the cooling sleeve 2 outside the neck ring die 1, the cooling speed of discharging is accelerated, the pipe is prevented from being collapsed due to gravity, and the deformation of the pipe is caused.
2) When the pipe is extruded from the extrusion die head, the steel rope is naturally positioned in the pipe, the pipe extruded from the extrusion die head moves backwards under the traction action of a traction machine, and the pipe firstly enters a sizing sleeve for vacuum cooling sizing;
3) the vacuum-cooled and sized pipe enters a spraying area of a cooling spraying device, a cooling spraying pipe network sprays cooling water columns which are distributed in a staggered mode, and the cooling water columns are sprayed to the outer surface of the pipe at an entrance angle of 5-10 degrees for cooling; meanwhile, in the process that the pipe moves backwards in the spraying area of the cooling spraying device, the pipe also penetrates into the inner side of the roller ring 4 of the roller ring component and is in matched contact with the roller 5, and the pipe pulled backwards drives the roller 5 to roll;
in the process that the pipe continues to move backwards, the anti-deformation bracket 7 is integrally coated inside, the inner wall of the pipe is in matched contact with the tubular outer wall at the rear part of the shell 7-1 of the anti-deformation bracket 7, and in the process that the pipe moves backwards under the traction action of the tractor, the anti-deformation bracket 7 provides supporting force inside the pipe to prevent the pipe from deforming in the traction process, and at the moment, the steel rope is tightened to be positioned inside the pipe;
4) after the tube is pulled, it is cut.
The statements in this specification merely set forth a list of implementations of the inventive concept and the scope of the present invention should not be construed as limited to the particular forms set forth in the examples.
Claims (10)
1. The ultrathin polyethylene pipeline production equipment is characterized by comprising a cooling spraying device, a supporting structure, an extruder, a sizing sleeve, a plurality of roller ring assemblies and a tractor, wherein the extruder, the sizing sleeve, the plurality of roller ring assemblies and the tractor are sequentially arranged from left to right; when the pipe is pulled backwards, the pipe is sleeved outside the supporting structure, the inner wall of the pipe is in contact with the outer wall of the supporting structure and drives the supporting structure to move backwards, when a steel rope connected with the head of the supporting structure and the extruder is tightened, the supporting structure is positioned between an upper crawler and a lower crawler of the tractor, the upper crawler and the lower crawler of the tractor clamp the outer wall of the pipe, and the supporting structure is used for providing enough supporting force for the pipe and preventing the pipe from deforming in the pulling process; the roller ring assembly is arranged in a spraying area of the cooling spraying device and used for providing rolling limiting effect on the outer wall of the backward-pulled pipe, and deformation of the pipe is prevented.
2. The ultra-thin polyethylene pipeline production equipment as claimed in claim 1, wherein the supporting structure comprises a deformation prevention bracket (7), the deformation prevention bracket (7) comprises a supporting beam (7-3) and a shell (7-1) arranged on the supporting beam (7-3), a plurality of groups of supporting brackets (7-2) are arranged along the length direction of the supporting beam (7-3), each group of supporting brackets (7-2) comprises at least 3 supporting brackets arranged on the periphery of the supporting beam (7-3), and one end of each supporting bracket, which is far away from the supporting beam (7-3), is fixedly connected with the inner wall of the shell (7-1).
3. The ultra-thin polyethylene pipeline production equipment as claimed in claim 2, wherein one end of the supporting beam (7-3) penetrates out of the head of the housing (7-1) and is connected with a steel rope, and the other end of the steel rope penetrates through the roller ring assembly and the sizing sleeve and is connected to the extruder; the outer surface of the shell (7-1) is smooth, the front section of the shell (7-1) is in a half-fusiform shape, the rear section of the shell (7-1) is in a tubular shape, when a pipe is extruded, the half-fusiform shape of the head of the shell (7-1) can facilitate the pipe to penetrate through the outer side of the shell (7-1), and the inner wall of the pipe can be in matched contact with the tubular outer wall of the rear section of the shell (7-1).
4. The ultra-thin polyethylene pipeline production equipment as claimed in claim 2, wherein the casing (7-1), the support bracket (7-2) and the support beam (7-3) are made of aluminum alloy.
5. The ultra-thin polyethylene pipeline production equipment as claimed in claim 1, wherein the extruder comprises an extrusion die head, the extrusion die head comprises a core die, a neck die (1) and an annular material flow channel arranged between the core die and the neck die (1), the outlet of the annular material flow channel is connected with a sizing sleeve, the outer side of the neck die (1) close to the outlet end thereof is provided with a cooling sleeve (2), the cooling sleeve (2) is internally provided with an annular cooling flow channel, the cooling sleeve (2) is provided with a water inlet (21) and a water outlet which are communicated with the annular cooling flow channel, so that cooling liquid is introduced into the cooling sleeve (2) to cool and shape the extruded pipe in advance;
and a lifting ring (3) is arranged on a core die of the extrusion die head, and the other end of the steel rope is connected with the lifting ring (3).
6. The ultra-thin polyethylene pipeline production equipment as claimed in claim 1, wherein the roller ring assembly comprises a roller ring (4) and 3 rollers (5) uniformly spaced inside the roller ring (4), the 3 rollers (5) arranged inside the roller ring (4) are respectively located at three vertexes of a virtual equilateral triangle, the rollers (5) are in a central symmetrical structure with two thick ends and a thin middle part and a gently reduced thickness from the two ends to the middle part, and a cross section of one side of each roller (5) is in an arc shape matched with the outer wall of the pipe.
7. The ultra-thin polyethylene pipeline production equipment as claimed in claim 6, wherein the roller ring (4) is provided with 3 threaded holes at regular intervals, each threaded hole is connected with a support rod in a matching threaded manner, the other end of the support rod is connected with a support frame in a matching threaded manner, and a roller (5) is rotatably connected with one support frame.
8. The ultra-thin polyethylene pipeline production equipment as claimed in claim 1, wherein the cooling spray device comprises a cooling spray pipe network, the cooling spray pipe network can spray cooling water columns which are arranged in a staggered mode, and when the pipe passes through a spray area of the cooling spray device, the cooling water columns spray cooling water columns onto the outer surface of the pipe at an incident angle of 5-10 degrees.
9. A production method of the ultra-thin polyethylene pipe production equipment based on claim 1, characterized by comprising the steps of:
1) after the pipe is extruded and pre-cooled by the extruder, the steel rope is naturally positioned in the pipe, the pipe extruded from the extruder moves backwards under the traction action of the tractor, and the pipe firstly enters a sizing sleeve for vacuum cooling sizing;
2) the vacuum-cooled and sized pipe enters a spraying area of a cooling spraying device, a cooling spraying pipe network sprays cooling water columns which are distributed in a staggered mode, and the cooling water columns are sprayed to the outer surface of the pipe at an entrance angle of 5-10 degrees for cooling; meanwhile, in the process that the pipe moves backwards in the spraying area of the cooling spraying device, the pipe also penetrates into the inner side of the roller ring (4) of the roller ring component and is in matched contact with the rollers (5), and the pipe pulled backwards drives the rollers (5) to roll;
in the process of continuously moving the pipe backwards, the supporting structure is integrally coated inside, the inner wall of the pipe is contacted with the outer wall of the supporting structure, and in the process of moving the pipe backwards under the traction action of the tractor, the supporting structure provides supporting force inside the pipe to prevent the pipe from deforming in the traction process, and at the moment, the steel rope is tightened inside the pipe;
3) after the tube is pulled, it is cut.
10. The method for producing ultrathin polyethylene pipe as claimed in claim 9, wherein the specific process of extruding and pre-cooling the pipe by the extruder in step 1) is as follows: the method comprises the steps of drying polyethylene raw materials, feeding the dried polyethylene raw materials into an extruder, heating and plasticizing the polyethylene raw materials by using a machine barrel and an extrusion die head of the extruder, extruding and molding the polyethylene raw materials through an annular material flow channel between the core die and a neck ring die (1) of the extrusion die head, and introducing cooling liquid into a cooling sleeve (2) on the outer side of the neck ring die (1) to perform advanced cooling and shaping of pipe extrusion.
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| CN202111337360.7A CN114131877B (en) | 2021-11-12 | 2021-11-12 | Production equipment and production method for ultrathin polyethylene pipeline |
| PCT/CN2022/077384 WO2023082491A1 (en) | 2021-11-12 | 2022-02-23 | Ultra-thin polyethylene pipeline production device and production method |
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| CN202111337360.7A CN114131877B (en) | 2021-11-12 | 2021-11-12 | Production equipment and production method for ultrathin polyethylene pipeline |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114803138A (en) * | 2022-05-19 | 2022-07-29 | 宝丰钢业集团有限公司 | Steel pipe sleeving and arranging device |
| CN116766453A (en) * | 2023-07-05 | 2023-09-19 | 杭州泰德机电有限公司 | MPP pipeline production is with traction auxiliary device with heat dissipation function |
| CN117162455A (en) * | 2023-09-08 | 2023-12-05 | 浙江远旺电力设备有限公司 | MPP power tube plastic tubing extrudes setting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117001975B (en) * | 2023-06-07 | 2024-02-23 | 杭州人通管业有限公司 | Power cable protection tube shaping and cooling device based on sectional temperature control adjustment |
| CN117718347B (en) * | 2023-12-20 | 2024-06-14 | 四川万圣通精密机械制造有限公司 | Cold drawing machine |
| CN117681406B (en) * | 2024-02-01 | 2024-05-03 | 青州市塑霸机械有限公司 | Extrusion molding machine for plastic pipe production |
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Also Published As
| Publication number | Publication date |
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| CN114131877B (en) | 2023-02-07 |
| WO2023082491A1 (en) | 2023-05-19 |
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