A sizing sleeve for chlorinated polyvinyl chloride extrusion and a cooling device for extrusion

By designing the scattered grooves and wear-resistant coating scattering sleeves, the scratches and uneven cooling problems caused by the unreasonable layout of the cooling holes of the scattering sleeves in the production process of chlorinated polyvinyl chloride pipelines in the prior art are solved, and a more uniform cooling effect and higher product quality are achieved.

CN222697880UActive Publication Date: 2025-04-01SHANDONG XIANGSHENG NEW MATERIALS TECH CO LTD
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Patent Information

Application Number
CN202420997747.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-09
Publication Date
2025-04-01
Estimated Expiration
2034-05-09

AI Technical Summary

Technical Problem

During the production process of existing chlorinated polyvinyl chloride pipelines, the unreasonable layout of the cooling holes in the sizing sleeve leads to scratches on the surface of the pipeline, affecting product quality and production efficiency. At the same time, the cooling effect is uneven, resulting in yellowing or breaking of the product.

Method used

A sizing sleeve is designed including a cylindrical sizing sleeve body and several layers of cooling ports. The cooling port is provided with several grooves in the axial direction. The grooves penetrate through the inner and outer walls of the sizing sleeve. The grooves are arranged in an erratic manner, and are arranged in an arc shape at the edge of the inner wall. The inside of the main body of the sizing sleeve is equipped with a wear-resistant coating, and the groove length is 3.5-4 times the spacing between adjacent layers.

Benefits of technology

The trenched misaligned grooves can achieve uniform cooling of chlorinated polyvinyl chloride materials in the sizing sleeve, reducing the risk of scratches on the pipe surface, and improving product quality and production efficiency. The wear-resistant coating increases the corrosion resistance and wear resistance of the sizing sleeve and extends the service life.

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Abstract

The utility model discloses a sizing sleeve for chlorinated polyvinyl chloride extrusion and a cooling device for extrusion, and relates to the technical field of pipeline production. A sizing sleeve body is provided with a plurality of grooves along the axial direction, and the plurality of grooves penetrate the inner and outer walls of the sizing sleeve body; the grooves of adjacent layers are staggered along the axial direction of the sizing sleeve body, and the plurality of grooves are arranged in an arc shape at the edge of one side of the inner wall of the sizing sleeve body; a stainless steel hole plate is provided at one end of the sizing sleeve body, and an embedding hole adapted to the outer diameter of the sizing sleeve body is provided in the middle of the stainless steel hole plate; a cooling cylinder is provided on the outer side of the sizing sleeve body, and a fixing hole adapted to the stainless steel hole plate is opened at one end of the cooling cylinder, and a cooling device is provided in the cooling cylinder. The stainless steel hole plate can make the sizing sleeve body more convenient to be fixedly connected with the cooling device, and the outer side of the sizing sleeve body is cooled by the cooling device at the same time, which is convenient to use and has a good cooling effect.
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Description

Technical Field

[0001] The utility model relates to the technical field of pipeline production, in particular to a sizing sleeve for extrusion of chlorinated polyvinyl chloride and a temperature reducing device for extrusion. Background Art

[0002] Chlorinated polyvinyl chloride pipes are widely used in the fields of chemical industry, medicine, electricity, etc. due to their excellent corrosion resistance, heat resistance, flame retardancy and mechanical properties. In the production process of chlorinated polyvinyl chloride pipes, the sizing sleeve, as a key component of pipe extrusion molding, plays a decisive role in the outer diameter size and surface quality of the pipe. During the use of the sizing sleeve, the high-temperature molten chlorinated polyvinyl chloride material is in direct contact with the inner wall of the sizing sleeve. The edges of the cooling holes on the sizing sleeve are relatively sharp, which will cause scratches on the surface of the chlorinated polyvinyl chloride pipe, affecting product quality and production efficiency. At the same time, unreasonable layout of cooling holes may lead to uneven cooling effect of chlorinated polyvinyl chloride pipes, resulting in yellowing and material breakage of the product. Summary of the invention

[0003] The first technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a sizing sleeve for chlorinated polyvinyl chloride extrusion is provided, which reduces the possibility of scratches on the surface of the chlorinated polyvinyl chloride pipeline and improves the quality of the product.

[0004] To solve the above-mentioned first technical problem, the technical solution of the utility model is:

[0005] A sizing sleeve for chlorinated polyvinyl chloride extrusion, comprising a cylindrical sizing sleeve body, wherein the sizing sleeve body is provided with a plurality of layers of cooling ports along the axial direction, each layer of the cooling ports comprises a plurality of grooves arranged along the circumference of the sizing sleeve body, and the plurality of grooves penetrate the inner and outer walls of the sizing sleeve body;

[0006] The grooves of adjacent layers are staggered along the axial direction of the sizing sleeve body, and a plurality of the grooves are arranged in an arc shape at the edge of one side of the inner wall of the sizing sleeve body.

[0007] As an improved technical solution, a wear-resistant coating is provided on the inner side of the sizing sleeve body, and the thickness of the wear-resistant coating is between 0.2 mm and 0.6 mm.

[0008] As an improved technical solution, the length of the groove is 3.5-4 times the spacing between the grooves of adjacent layers.

[0009] The second technical problem to be solved by the utility model is: to provide a cooling device for chlorinated polyvinyl chloride extrusion in view of the deficiencies in the prior art, which has a uniform cooling effect and improves the quality of the product.

[0010] In order to solve the above second technical problem, the technical solution of the utility model is:

[0011] A cooling device for chlorinated polyvinyl chloride extrusion, comprising a cylindrical sizing sleeve body, the sizing sleeve body being provided with a plurality of cooling ports along the axial direction, each layer of the cooling ports comprising a plurality of grooves arranged along the circumference of the sizing sleeve body, the plurality of grooves penetrating the inner and outer walls of the sizing sleeve body;

[0012] The grooves of adjacent layers are staggered along the axial direction of the sizing sleeve body, and a plurality of the grooves are arranged in an arc shape at the edge of one side of the inner wall of the sizing sleeve body;

[0013] A stainless steel hole plate is provided at one end of the sizing sleeve body, and an embedding hole adapted to the outer diameter of the sizing sleeve body is provided in the middle of the stainless steel hole plate;

[0014] A cooling cylinder is arranged on the outer side of the sizing sleeve body, a fixing hole adapted to the stainless steel orifice plate is opened at one end of the cooling cylinder, and a cooling device is arranged inside the cooling cylinder.

[0015] As an improved technical solution, a sealing gasket is provided between the stainless steel perforated plate and the outer wall of the cooling cylinder.

[0016] As an improved technical solution, an annular sealing groove is provided at one end of the outer side of the stainless steel orifice plate, and a sealing block adapted to the sealing groove is provided at one end of the sizing sleeve body.

[0017] As an improved technical solution, a plurality of circumferentially arranged water inlet pipes are provided on the inner side of the cooling cylinder, and a plurality of the water inlet pipes are axially connected to a plurality of cooling nozzles.

[0018] As a preferred technical solution, the stainless steel orifice plate is provided with an internal thread at the embedding hole, and one end of the sizing sleeve body is provided with an external thread adapted to the internal thread.

[0019] As a preferred technical solution, the plurality of cooling nozzles are arranged obliquely toward the center of the sizing sleeve body.

[0020] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0021] The utility model provides a sizing sleeve for chlorinated polyvinyl chloride extrusion, comprising a cylindrical sizing sleeve main body, wherein the sizing sleeve main body is provided with several layers of cooling ports along the axial direction, wherein each layer of the cooling ports comprises several grooves arranged along the circumference of the sizing sleeve main body, wherein the several grooves penetrate the inner and outer walls of the sizing sleeve main body; the grooves of adjacent layers are staggered along the axial direction of the sizing sleeve main body, and the several grooves are arranged in an arc shape at the edge of one side of the inner wall of the sizing sleeve main body. Through the grooves arranged in an upper and lower staggered manner, the overall cooling of the chlorinated polyvinyl chloride material in the sizing sleeve main body is more uniform, which is beneficial to improving the quality and quality of the product, and for better cooling, there will be no cooling dead corner. In addition, the groove is arranged in an arc shape at the edge of one side of the inner wall of the sizing sleeve main body, which makes the contact with the chlorinated polyvinyl chloride material softer and is not easy to cause scratches thereon, further improving the quality of the product.

[0022] The inner side of the sizing sleeve body is provided with a wear-resistant coating, and the thickness of the wear-resistant coating is between 0.2 mm and 0.6 mm. The wear-resistant coating increases the corrosion resistance and wear resistance of the sizing sleeve body and increases its service life.

[0023] The length of the groove is 3.5-4 times the spacing between the grooves in adjacent layers, which has a better cooling effect on the chlorinated polyvinyl chloride material.

[0024] The utility model discloses a cooling device for chlorinated polyvinyl chloride extrusion, comprising a cylindrical sizing sleeve body, the sizing sleeve body is provided with several layers of cooling ports along the axial direction, each layer of the cooling ports comprises several grooves arranged along the circumference of the sizing sleeve body, and several of the grooves penetrate the inner and outer walls of the sizing sleeve body; the grooves of adjacent layers are arranged in an axial staggered manner along the sizing sleeve body, and several of the grooves are arranged in an arc shape at the edge of one side of the inner wall of the sizing sleeve body; a stainless steel hole plate is arranged at one end of the sizing sleeve body, and an embedding hole adapted to the outer diameter of the sizing sleeve body is arranged in the middle of the stainless steel hole plate; a cooling cylinder is arranged on the outer side of the sizing sleeve body, a fixing hole adapted to the stainless steel hole plate is opened at one end of the cooling cylinder, and a cooling device is arranged in the cooling cylinder. The stainless steel hole plate can make the sizing sleeve body more convenient to be fixedly connected with the cooling device, and the outer side of the sizing sleeve body is cooled by the cooling device at the same time, which is convenient to use and has a good cooling effect.

[0025] A sealing gasket is arranged between the stainless steel hole plate and the outer wall of the cooling cylinder. The stainless steel hole plate and the cooling cylinder have a good sealing effect and are not prone to water leakage.

[0026] An annular sealing groove is provided at one end of the outer side of the stainless steel orifice disk, and a sealing block adapted to the sealing groove is provided at one end of the sizing sleeve body. The cooperation between the sealing groove and the sealing block can prevent the end of the sizing sleeve body from exceeding the stainless steel orifice disk, thereby playing a limiting role. At the same time, the connection between the stainless steel orifice disk and the sizing sleeve body can be sealed to prevent cooling water from flowing out of the connection.

[0027] A plurality of circumferentially arranged water inlet pipes are provided on the inner side of the cooling cylinder, and a plurality of the water inlet pipes are axially connected with a plurality of cooling nozzles, and the plurality of cooling nozzles are inclinedly arranged toward the center of the sizing sleeve body, and the outer side of the sizing sleeve body is sprayed and cooled by the nozzles. On the one hand, the amount of cooling water is saved and the energy cost is saved. On the other hand, the cooling of the mist water is more uniform and the cooling effect is better.

[0028] The stainless steel hole plate is provided with an internal thread at the embedding hole, and one end of the sizing sleeve body is provided with an external thread adapted to the internal thread. The stainless steel hole plate and the sizing sleeve body can be conveniently disassembled and assembled, and are convenient for replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Figure 1 It is a structural schematic diagram of the sizing sleeve body in Embodiment 1 of the present utility model;

[0031] Figure 2 It is a schematic diagram of the structure of the cooling cylinder in Embodiment 2 of the present utility model;

[0032] Among them: 1. Sizing sleeve body; 2. Groove; 3. Wear-resistant coating; 4. Stainless steel hole plate; 5. Embedded hole; 6. Cooling cylinder; 7. Fixing hole; 8. Sealing groove; 9. Sealing block; 10. Water inlet pipe; 11. Cooling nozzle; 12. Internal thread; 13. External thread.

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0034] Example 1

[0035] like Figure 1As shown, a sizing sleeve for chlorinated polyvinyl chloride extrusion comprises a cylindrical sizing sleeve body 1, wherein the sizing sleeve body 1 is provided with several layers of cooling ports along the axial direction, wherein each layer of the cooling ports comprises several grooves 2 arranged along the circumference of the sizing sleeve body 1, and the several grooves 2 penetrate the inner and outer walls of the sizing sleeve body 1; the grooves 2 of adjacent layers are staggered along the axial direction of the sizing sleeve body 1, and the several grooves 2 are arranged in an arc shape at the edge of one side of the inner wall of the sizing sleeve body 1. Through the grooves 2 arranged in an upper and lower staggered manner, the overall cooling of the chlorinated polyvinyl chloride material in the sizing sleeve body 1 is more uniform, which is conducive to improving the quality and quality of the product. For better cooling, the projections of the upper and lower adjacent grooves 2 in the horizontal direction in this embodiment overlap, and there will be no dead angle for cooling. In addition, the grooves 2 are arranged in an arc shape at the edge of one side of the inner wall of the sizing sleeve body 1, which makes the contact with the chlorinated polyvinyl chloride material softer and is not easy to cause scratches on it, further improving the quality of the product.

[0036] The inner side of the sizing sleeve body 1 is provided with a wear-resistant coating 3, and the thickness of the wear-resistant coating 3 is between 0.2 mm and 0.6 mm. The wear-resistant coating 3 increases the corrosion resistance and wear resistance of the sizing sleeve body 1 and increases its service life.

[0037] The length of the groove 2 is 3.5-4 times the spacing between the grooves 2 of adjacent layers, the spacing between the grooves 2 of two adjacent layers is 8-10 mm, and the width of the groove is 1.5 mm-3.0 mm, which has a better cooling effect on chlorinated polyvinyl chloride materials.

[0038] Example 2

[0039] like Figure 1-2 As shown, a cooling device for extrusion of chlorinated polyvinyl chloride comprises a cylindrical sizing sleeve body 1, wherein the sizing sleeve body 1 is provided with a plurality of layers of cooling ports along the axial direction, wherein each layer of the cooling ports comprises a plurality of grooves 2 arranged circumferentially along the sizing sleeve body 1, wherein the plurality of grooves 2 penetrate the inner and outer walls of the sizing sleeve body 1; the grooves 2 of adjacent layers are staggered along the axial direction of the sizing sleeve body 1, and the plurality of grooves 2 are arranged in an arc shape at the edge of one side of the inner wall of the sizing sleeve body 1; a stainless steel orifice plate 4 is provided at one end of the sizing sleeve body 1, and an embedding hole 5 adapted to the outer diameter of the sizing sleeve body 1 is provided in the middle of the stainless steel orifice plate 4; a cooling cylinder 6 is provided on the outer side of the sizing sleeve body 1, and a fixing hole 7 adapted to the stainless steel orifice plate 4 is opened at one end of the cooling cylinder 6, and a cooling device is provided in the cooling cylinder 6. The stainless steel perforated plate 4 can make it more convenient to fix the sizing sleeve body 1 to the cooling device, and at the same time, the cooling device can be used to cool the outer side of the sizing sleeve body 1, which is easy to use and has a good cooling effect.

[0040] A sealing gasket is arranged between the stainless steel perforated disc 4 and the outer wall of the cooling tube 6. The stainless steel perforated disc 4 and the cooling tube 6 have a good sealing effect and are not prone to water leakage.

[0041] An annular sealing groove 8 is provided at one end of the outer side of the stainless steel orifice disk 4, and a sealing block 9 adapted to the sealing groove 8 is provided at one end of the sizing sleeve body 1. The cooperation between the sealing groove 8 and the sealing block 9 can prevent the end of the sizing sleeve body from exceeding the stainless steel orifice disk 4, thereby playing a limiting role. At the same time, the connection between the stainless steel orifice disk 4 and the sizing sleeve body 1 can be sealed to prevent cooling water from flowing out of the connection.

[0042] A plurality of circumferentially arranged water inlet pipes 10 are provided on the inner side of the cooling cylinder 6, and a plurality of the water inlet pipes 10 are axially connected with a plurality of cooling nozzles 11, and the plurality of cooling nozzles 11 are inclinedly arranged toward the center of the sizing sleeve body 1, and the outer side of the sizing sleeve body 1 is sprayed and cooled by the nozzles. On the one hand, the amount of cooling water is saved and the energy cost is saved. On the other hand, the cooling of the mist water is more uniform and the cooling effect is better.

[0043] The stainless steel hole plate 4 is provided with an internal thread 12 at the embedding hole 5, and one end of the sizing sleeve body 1 is provided with an external thread 13 adapted to the internal thread 12. The stainless steel hole plate 4 and the sizing sleeve body 1 can be conveniently disassembled and assembled for replacement and maintenance.

[0044] It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A sizing sleeve for extrusion of chlorinated polyvinyl chloride, comprising a cylindrical sizing sleeve body, characterized in that: The sizing sleeve body is provided with a plurality of layers of cooling ports along the axial direction, each layer of the cooling ports comprises a plurality of grooves arranged along the circumference of the sizing sleeve body, and the plurality of grooves penetrate the inner and outer walls of the sizing sleeve body; The grooves of adjacent layers are staggered along the axial direction of the sizing sleeve body, and a plurality of the grooves are arranged in an arc shape at the edge of one side of the inner wall of the sizing sleeve body.

2. A sizing sleeve for chlorinated polyvinyl chloride extrusion as claimed in claim 1, characterized in that: The inner side of the sizing sleeve body is provided with a wear-resistant coating, and the thickness of the wear-resistant coating is between 0.2 mm and 0.6 mm.

3. A sizing sleeve for extrusion of chlorinated polyvinyl chloride as claimed in claim 1, characterized in that: The length of the groove is 3.5-4 times the distance between the grooves in adjacent layers.

4. A cooling device for chlorinated polyvinyl chloride extrusion, characterized in that: A sizing sleeve for chlorinated polyvinyl chloride extrusion according to any one of claims 1 to 3, wherein one end of the sizing sleeve body is provided with a stainless steel hole disk, and the middle of the stainless steel hole disk is provided with an embedding hole adapted to the outer diameter of the sizing sleeve body; A cooling cylinder is arranged on the outer side of the sizing sleeve body, a fixing hole adapted to the stainless steel orifice plate is opened at one end of the cooling cylinder, and a cooling device is arranged inside the cooling cylinder.

5. A cooling device for chlorinated polyvinyl chloride extrusion as claimed in claim 4, characterized in that: A sealing gasket is provided between the stainless steel perforated plate and the outer wall of the cooling cylinder.

6. A cooling device for chlorinated polyvinyl chloride extrusion as claimed in claim 4, characterized in that: An annular sealing groove is arranged at one end of the outer side of the stainless steel orifice plate, and a sealing block adapted to the sealing groove is arranged at one end of the sizing sleeve body.

7. A cooling device for chlorinated polyvinyl chloride extrusion as claimed in claim 4, characterized in that: A plurality of circumferentially arranged water inlet pipes are provided on the inner side of the cooling cylinder, and a plurality of the water inlet pipes are axially connected to a plurality of cooling nozzles.

8. A cooling device for chlorinated polyvinyl chloride extrusion as claimed in claim 4, characterized in that: The stainless steel hole plate is provided with an internal thread at the embedding hole, and one end of the sizing sleeve body is provided with an external thread adapted to the internal thread.

9. A cooling device for chlorinated polyvinyl chloride extrusion as claimed in claim 7, characterized in that: The plurality of cooling nozzles are arranged obliquely toward the center of the sizing sleeve body.