Annular blowing anti-slag and anti-crystallization device for plastic pipe extrusion

Abstract

The utility model relates to the technical field of plastic pipe extrusion, in particular to an annular blowing anti-slag and anti-crystallization device for plastic pipe extrusion. According to the technical scheme, the cooling device comprises a fixed ring and a rotary blowing ring, a cooling air inlet pipe is fixedly connected to the outer surface of the fixed ring, the rotary blowing ring is rotationally installed in the fixed ring, an annular airflow cavity is formed in the rotary blowing ring, and a plurality of air inlet holes are formed in the outer surface of the rotary blowing ring in an annular array at equal intervals. By forming a uniform annular air barrier on the outer surface of the extruded plastic tube, the cooling uniformity and efficiency of the extruded plastic tube are improved, the possibility of crystallization of the extruded plastic tube is greatly reduced, and meanwhile, the outer surface of the extruded plastic tube is purged by continuously changing airflow directions, so that the service life of the extruded plastic tube is prolonged. Therefore, tiny slag charge or initial crystal particles appearing on the surface of the extruded plastic pipe can be better blown away in time, the surface smoothness of the plastic pipe is improved, and the quality of the plastic pipe is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic pipe extrusion, specifically to a plastic pipe extrusion annular blowing anti-slag anti-crystallization device. BACKGROUND

[0002] In the plastic pipe extrusion process, annular blowing anti-slag anti-crystallization technology plays a vital role. When the plastic pipe is extruded from the extruder, the high-temperature plastic is in a molten state and is extremely susceptible to external factors to produce slag and crystallization. The annular blowing device surrounds the die head of the pipe extrusion and blows air with a certain pressure and speed to the pipe surface. This air flow forms an annular air barrier. On the one hand, it can quickly cool the pipe surface, allowing the plastic to quickly set, reducing the possibility of crystallization caused by uneven cooling. On the other hand, the continuous airflow can prevent dust, impurities, and other substances in the surrounding air from adhering to the pipe surface, preventing the formation of slag. At the same time, the airflow can also have a certain wiping effect on the pipe surface, blowing away any small slag or initial crystallization particles in time, thereby ensuring the smoothness and quality of the pipe surface and effectively improving the production efficiency and product qualification rate of the plastic pipe.

[0003] The existing plastic pipe extrusion annular blowing device is usually fixed, so the annular air barrier formed around the extruded plastic pipe is not uniform. On the one hand, this leads to uneven cooling of the extruded plastic pipe, reducing the cooling efficiency of the plastic pipe and increasing the likelihood of crystallization. On the other hand, the fixed airflow has limited wiping effect on the surface of the extruded plastic pipe, which cannot effectively blow away any small slag or initial crystallization particles on the surface of the extruded plastic pipe in time, thereby reducing the smoothness and quality of the plastic pipe. To address this issue, we propose a plastic pipe extrusion annular blowing anti-slag anti-crystallization device. SUMMARY

[0004] The utility model discloses a plastic pipe material extrusion annular blowing anti -slag anti -crystallization device possesses can form the even annular air barrier at the extrusion plastic pipe outer surface, improves the uniformity and efficiency of extrusion plastic pipe cooling, greatly reduces the possibility of crystallization of extrusion plastic pipe, and the airflow direction of constantly changing sweeps the outer surface of extrusion plastic pipe to can better blow away the tiny slag or initial crystalline particle of extrusion plastic pipe material surface in time, and then improve plastic pipe material surface finish and quality reduction advantage, the plastic pipe material extrusion annular blowing device of existing usually is fixed, and thus the annular air barrier formed around the extrusion plastic pipe material is not enough even, on one hand, leads to the cooling of extrusion plastic pipe material not enough even, reduces the cooling efficiency of plastic pipe material, also leads to the possibility of crystallization of plastic pipe material increases, on the other hand, the wiping effect of fixed airflow to the surface of extrusion plastic pipe material is limited, can not good blow away the tiny slag or initial crystalline particle of extrusion plastic pipe material surface in time, to lead to the problem of plastic pipe material surface finish and quality reduction.

[0005] To realize the above-mentioned purpose, the utility model provides the following technical scheme: a plastic pipe material extrusion annular blowing anti -slag anti -crystallization device, including fixed ring and rotating blowing ring, the fixed ring outer surface fixedly connected with cooling air inlet pipe, the fixed ring inside rotationally installed with rotating blowing ring, the rotating blowing ring inside be provided with annular air flow cavity, the rotating blowing ring outer surface annular array equidistance and divide with a plurality of air inlet holes, the rotating blowing ring inner wall annular array equidistance and divide with a plurality of inclined air outlet.

[0006] Preferably, the rotating blowing ring outer surface is fixedly sleeved with a fixed sealing baffle ring near the front surface and the rear surface, the fixed ring inner wall is provided with an annular sealing groove near the front surface and the rear surface, the annular sealing groove is provided with a sealing ring, and the outer surface edge of the fixed sealing baffle ring is located in the annular sealing groove. The rotating blowing ring rotates through the fixed sealing baffle ring and the annular sealing groove, and an annular airflow channel is formed between the two fixed sealing baffle rings, the rotating blowing ring, and the fixed ring. The cooling air enters the annular airflow cavity through the annular array of air inlet holes, and the sealing ring prevents the cooling air from leaking out of the annular airflow channel.

[0007] Preferably, the outer surface of the rotating blowing ring is fixedly installed with blades between two adjacent air inlet holes, and the blades are located between two fixed sealing rings; the direction of the cooling air entering the annular airflow channel from the cooling air inlet pipe is along the tangent direction of the inner wall of the fixed ring; when the cooling air in the cooling air inlet pipe enters the airflow channel, it blows to the blades, and the rotating blowing ring is driven to rotate by the blades, which is beneficial to the rotation of the rotating blowing ring.

[0008] Preferably, a flow dividing ring is fixedly installed inside the annular airflow cavity, and a plurality of flow dividing holes are uniformly arranged on the outer surface of the flow dividing ring; when the cooling air enters the annular airflow cavity through the air inlet hole and passes through the flow dividing ring, the cooling air is divided by the plurality of flow dividing holes uniformly arranged on the flow dividing ring, so that the cooling air is uniformly distributed in the annular airflow cavity, and then uniformly discharged from the inclined air outlet, and a uniform annular air barrier is formed on the outer surface of the extruded plastic pipe.

[0009] Preferably, a fixed pipe is rotatably connected to the front surface of the rotating blowing ring through a connecting bearing; the fixed pipe and the rotating blowing ring are connected through the connecting bearing, so as to facilitate the rotation of the rotating blowing ring.

[0010] Preferably, a fixed flange is fixedly connected to the end of the fixed pipe; the fixed pipe is fixedly installed through the cooperation of the fixed flange and the fixing bolt.

[0011] Compared with the prior art, the utility model has the advantages of the following:

[0012] 1、The utility model discloses a fixed ring, a cooling air inlet pipe, a rotating blowing ring, an annular airflow cavity, an air inlet hole and an inclined air outlet are arranged, which can form a uniform annular air barrier on the outer surface of the extruded plastic pipe, improve the uniformity and efficiency of the extruded plastic pipe cooling, greatly reduce the possibility of crystallization of the extruded plastic pipe, and constantly change the airflow direction to blow the outer surface of the extruded plastic pipe, so that the small slag or initial crystallization particles on the surface of the extruded plastic pipe can be blown away in time, thereby improving the surface finish and quality reduction effect of the plastic pipe material, the cooling air enters the annular airflow cavity through the cooling air inlet pipe and the air inlet hole, and is discharged from the inclined air outlet, blows to the outer surface of the extruded plastic pipe, and the inclined air outlet rotates under the action of the airflow, so that the cooling air uniformly blows to the outer surface of the extruded plastic pipe and forms a uniform annular air barrier, and the airflow direction of the inclined air outlet changes constantly during rotation, which plays a blowing effect on the outer surface of the extruded plastic pipe.

[0013] 2, The utility model discloses a blade is set up, reached the effect that it is favorable to the rotation of the rotation blow -off ring, two fixed sealing baffle ring, rotation blow -off ring and fixed ring form a annular airflow channel, when the cooling air in the cooling air inlet pipe enters the airflow channel inside and is blown to the blade, then the rotation blow -off ring can be driven to rotate through the blade.

[0014] 3, The utility model discloses a shunt ring and shunt hole are set up, reached the effect that the cooling air distribution uniformity in annular airflow cavity can be improved, to make cooling air even from each oblique air outlet and form even annular air barrier on the extrusion plastic pipe outer surface, when cooling air enters annular airflow cavity inside through the air inlet hole, cooling air is shunted through the shunt ring on even distribution a plurality of shunt holes of the shunt ring, to make cooling air even distribution in annular airflow cavity, then even from each oblique air outlet. DRAWINGS

[0015] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 It is the fixed ring partial three-dimensional structure schematic diagram of the utility model;

[0017] Figure 3 It is the rotation blow -off ring partial three-dimensional structure schematic diagram of the utility model;

[0018] Figure 4 It is the rotation blow -off ring partial three-dimensional structure schematic diagram of the utility model;

[0019] Figure 5 It is the fixed pipe partial three-dimensional structure schematic diagram of the utility model.

[0020] Sign significance: 1, cooling air inlet pipe;2, fixed ring;3, rotation blow -off ring;4, fixed pipe;5, annular sealing groove;6, sealing ring;7, oblique air outlet;8, fixed sealing baffle ring;9, blade;10, shunt ring;11, shunt hole;12, air inlet hole;13, annular airflow cavity;14, connecting bearing;15, fixed flange. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model is further explained below in combination with the drawings and specific embodiments.

[0022] Embodiment one

[0023] As Figures 1-5As shown, the utility model provides a kind of plastic pipe extrusion annular blowing anti-slag anti-crystallization device, including fixed ring 2 and rotating blow ring 3, rotating blow ring 3 front surface is rotatably connected with fixed tube 4 by connecting bearing 14, fixed tube 4 end is fixedly connected with fixed flange 15, fixed flange 15 cooperation fixed bolt will fixed tube 4 be fixed in the vicinity of plastic pipe extruder die, extruded plastic pipe passes through fixed tube 4 and rotating blow ring 3, fixed ring 2 outer surface is fixedly connected with cooling air inlet pipe 1, cooling air enters inside cooling air inlet pipe 1, rotating blow ring 3 is rotatably installed in fixed ring 2, rotating blow ring 3 inside is provided with annular airflow cavity 13, and rotating blow ring 3 outer surface is equidistantly provided with a plurality of air inlet holes 12 in annular array.

[0024] Rotating blow ring 3 outer surface is fixedly sleeved with fixed sealing baffle ring 8 at the position close to front surface and rear surface, and the inner wall of fixed ring 2 is provided with annular sealing groove 5 at the position close to front surface and rear surface, the inner part of the two annular sealing grooves 5 is provided with sealing ring 6, and the outer surface edge part of the two fixed sealing baffle rings 8 is located in the inner part of the two annular sealing grooves 5 respectively, rotating blow ring 3 rotates through fixed sealing baffle ring 8 and annular sealing groove 5, and an annular airflow channel is formed between the two fixed sealing baffle rings 8, rotating blow ring 3 and fixed ring 2, then the cooling air entering the annular airflow channel is evenly entered into the annular airflow cavity 13 through the plurality of air inlet holes 12 distributed in annular array, and the sealing ring 6 plays a sealing role to prevent the cooling air in the annular airflow channel from leaking out, the inner wall of rotating blow ring 3 is equidistantly provided with a plurality of inclined air outlets 7 in annular array, the cooling air in the annular airflow cavity 13 is discharged through the inclined air outlets 7, and the air outlet direction of the inclined air outlets 7 is along the tangent direction of the outer surface of the extruded plastic pipe.

[0025] In use, the plastic pipe extruded by the extruder passes through rotating blow ring 3, the cooling air enters the annular airflow cavity 13 through cooling air inlet pipe 1 and air inlet hole 12, and is discharged from inclined air outlet 7 to blow to the outer surface of the extruded plastic pipe, the inclined air outlet makes rotating blow ring 3 rotate under the action of airflow, then the cooling air is evenly blown to the outer surface of the extruded plastic pipe, and forms a uniform annular air barrier, improves the uniformity and efficiency of the extruded plastic pipe cooling, greatly reduces the possibility of crystallization of the extruded plastic pipe, and at the same time, the airflow direction of the inclined air outlet 7 changes constantly when rotating, which plays a blowing role on the outer surface of the extruded plastic pipe, so that the small slag or initial crystallization particles on the surface of the extruded plastic pipe can be blown away in time, thereby improving the surface finish and quality of the plastic pipe.

[0026] Example two

[0027] As Figure 1 , Figure 3 andFigure 4 As shown in the utility model discloses a kind of plastic pipe extrusion annular blowing anti- slag anti- crystallization device, compared with embodiment one, this embodiment further includes the direction of the inside cooling air of cooling air inlet pipe 1 entering into annular airflow passageway inside along the tangent direction of fixed ring 2 inner wall, rotating blow ring 3 outer surface between adjacent two air inlet holes 12 are fixedly installed with blade 9, and blade 9 is located between two fixed sealing baffle ring 8.

[0028] In the embodiment, when the cooling air in the cooling air inlet pipe 1 enters the airflow passageway, it blows to the blade 9, which can drive the rotating blow ring 3 to rotate through the blade 9, which is beneficial to the rotation of the rotating blow ring 3.

[0029] Embodiment three

[0030] As shown in the utility model discloses a kind of plastic pipe extrusion annular blowing anti- slag anti- crystallization device, compared with embodiment one, this embodiment further includes the direction of the inside cooling air of cooling air inlet pipe 1 entering into annular airflow passageway inside along the tangent direction of fixed ring 2 inner wall, rotating blow ring 3 outer surface between adjacent two air inlet holes 12 are fixedly installed with blade 9, and blade 9 is located between two fixed sealing baffle ring 8. Figure 1 、 Figure 3 and Figure 4 As shown in the utility model discloses a kind of plastic pipe extrusion annular blowing anti- slag anti- crystallization device, compared with embodiment one, this embodiment further includes the direction of the inside cooling air of cooling air inlet pipe 1 entering into annular airflow passageway inside along the tangent direction of fixed ring 2 inner wall, rotating blow ring 3 outer surface between adjacent two air inlet holes 12 are fixedly installed with blade 9, and blade 9 is located between two fixed sealing baffle ring 8.

[0031] In the embodiment, when the cooling air in the cooling air inlet pipe 1 enters the airflow passageway, it blows to the blade 9, which can drive the rotating blow ring 3 to rotate through the blade 9, which is beneficial to the rotation of the rotating blow ring 3.

[0032] The above specific embodiments are only several preferred embodiments of the utility model, based on the technical scheme of the utility model and the related inspiration of the above embodiments, the person skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A ring-shaped blowing device for preventing slag and crystallization during plastic pipe extrusion, comprising a fixed ring (2) and a rotating blowing ring (3), characterized in that: The outer surface of the fixed ring (2) is fixedly connected to a cooling air inlet pipe (1). A rotating purge ring (3) is rotatably installed inside the fixed ring (2). An annular airflow cavity (13) is provided inside the rotating purge ring (3). A number of air inlets (12) are arranged in an annular array on the outer surface of the rotating purge ring (3). A number of inclined air outlets (7) are arranged in an annular array on the inner wall of the rotating purge ring (3).

2. The annular blowing anti-slag and anti-crystallization device for extruding plastic pipes according to claim 1, characterized in that: Fixed sealing rings (8) are fixedly sleeved on the outer surface of the rotating purge ring (3) near the front and rear surfaces. Annular sealing grooves (5) are provided on the inner wall of the fixed ring (2) near the front and rear surfaces. Sealing rings (6) are provided inside the two annular sealing grooves (5), and the outer edges of the two fixed sealing rings (8) are located inside the two annular sealing grooves (5).

3. The annular blowing anti-slag and anti-crystallization device for extruding plastic pipes according to claim 2, characterized in that: The outer surface of the rotating purge ring (3) is fixedly equipped with blades (9) between two adjacent air inlets (12), and the blades (9) are located between two fixed sealing rings (8).

4. The annular blowing anti-slag and anti-crystallization device for extruding plastic pipes according to claim 1, characterized in that: A flow divider ring (10) is fixedly installed inside the annular airflow cavity (13), and a plurality of flow divider holes (11) are evenly distributed on the outer surface of the flow divider ring (10).

5. The annular blowing anti-slag and anti-crystallization device for extruding plastic pipes according to claim 1, characterized in that: The front surface of the rotating purge ring (3) is rotatably connected to a fixed tube (4) via a connecting bearing (14).

6. The annular blowing anti-slag and anti-crystallization device for extruding plastic pipes according to claim 5, characterized in that: The fixed flange (15) is fixedly connected to the end of the fixed pipe (4).

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