Cooling device for PVC pipe production

Abstract

This utility model provides a cooling device for PVC pipe production, relating to the field of PVC pipe cooling technology. It includes a PVC pipe extruder, with a primary cooling pipe installed at the outlet of the extruder and a secondary cooling pipe installed at the inlet of the primary cooling pipe. The primary cooling pipe contains coaxially distributed cooling columns with a clearance fit. By using the primary cooling pipe, the relatively soft pipe material extruded by the PVC pipe extruder is fitted onto the cooling columns, which provide internal support to ensure shape stability. Furthermore, as the pipe passes through the cooling columns, the cooling effect of the primary cooling pipe lowers its temperature and maintains its basic shape stability. This facilitates higher surface strength and hardness of the pipe material when exposed to air and water in the secondary cooling pipe, and since its temperature has already decreased, uneven yields due to temperature differences during subsequent air and water exposure are prevented.

Description

Technical Field

[0001] This utility model relates to the field of PVC pipe cooling technology, and in particular to a cooling device for PVC pipe production. Background Technology

[0002] After PVC pipes are extruded, they need to be cooled to solidify their shape and size. The cooling process gradually cools the pipe from a high-temperature molten state, eventually solidifying it into a finished product with a certain strength and shape.

[0003] Therefore, a cooling device for PVC pipe production, disclosed in CN221067145U, is described. In use, a support plate provides fixed support for the water-cooled tank. An outlet and regulating valve control the water volume within the tank, preventing water deterioration and allowing for rapid draining for easy water source replacement and cleaning. A return pipe recycles the cooling water from the tank. A connecting flange connects the water pump to the tank. A fixing connector secures the cooling pipes above the tank. Multiple spray nozzles cool the PVC pipes. An air outlet delivers cool air from a fan to the surface of the PVC pipes for secondary cooling, ensuring more thorough cooling.

[0004] However, in the existing technology, the spray heads and air outlets are located on one side of the PVC pipe. Single-sided cooling can only cool one side of the PVC pipe, while the cooling effect on the other side is relatively weak. This will result in a large temperature difference between the inside and outside or both sides of the pipe. The temperature difference may cause uneven stress distribution inside the pipe, which in turn will affect the dimensional accuracy and shape stability of the pipe. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the prior art by proposing a cooling device for PVC pipe production.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a cooling device for PVC pipe production, comprising a PVC pipe extruder, wherein a primary cooling pipe is installed at the outlet of the PVC pipe extruder, and a secondary cooling pipe is installed at the inlet of the primary cooling pipe. The primary cooling pipe is provided with cooling columns that are clearance-fitted and coaxially distributed. The primary cooling pipe has a spiral groove inside, and connecting pipes are installed through the outer wall of the primary cooling pipe at both ends of the spiral groove. The secondary cooling pipe has an air-cooling cavity and a water-cooling cavity that are coaxially distributed inside, and hollow rings that are rotatably installed at the inlets of the air-cooling cavity and the water-cooling cavity, which are coaxially arranged with the secondary cooling pipe.

[0007] Preferably, a screw threaded to the outlet of the PVC pipe extruder is provided through the central axis of the cooling column.

[0008] Preferably, the inner walls of the primary and secondary cooling pipes are slidably connected to the outer wall of the PVC pipe, and the side of the cooling column is slidably connected to the inner wall of the PVC pipe.

[0009] Preferably, a coaxially arranged gear ring is fixedly installed at the middle position of the outer side of the hollow ring, and a gear shaft passing through the water cooling cavity and the air cooling cavity is rotatably connected to the end face of the secondary cooling pipe.

[0010] Preferably, the gear shaft surface is provided with two gears, and the two gears are respectively meshed with two gear rings.

[0011] Preferably, an inner magnetic ring is embedded and fixedly installed at the end of the cooling column away from the PVC pipe extruder, and an outer magnetic ring with opposite polarity to the inner magnetic ring is fixedly installed on the outer wall of the primary cooling pipe.

[0012] Preferably, the primary cooling pipe and the secondary cooling pipe are divided into two equal halves along the transverse interface. Mounting seats are fixedly installed at the upper and lower positions of the PVC pipe extruder outlet. Insert brackets are inserted into the mounting seats. The two insert brackets are fixedly installed to the outer walls of the two equal halves of the primary cooling pipe, and an electric telescopic rod is provided between the insert brackets and the corresponding mounting seats.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, by setting a primary cooling pipe, the relatively soft pipe material extruded by the PVC pipe extruder is sleeved on the cooling column. The cooling column provides internal support to ensure shape stability. When passing through the cooling column, the cooling effect of the primary cooling pipe reduces the temperature and maintains the basic shape stability. This makes it easier to increase the surface strength and hardness of the pipe material when it is blown by air and sprayed by water in the secondary cooling pipe. Since the temperature has already been reduced, it will not cause uneven yield due to temperature difference during subsequent air blowing and water spraying.

[0015] 2. In this utility model, by setting a hollow ring, when the pipe that has undergone preliminary cooling passes through the secondary cooling pipe, the cold air and cooling water introduced into the air-cooled chamber and water-cooled chamber are sprayed out through the hollow ring and act on the surface of the pipe. As the hollow ring rotates, it covers the surface of the pipe, thus achieving comprehensive cooling. Attached Figure Description

[0016] Figure 1 This utility model provides a three-dimensional structural diagram of a cooling device for PVC pipe production;

[0017] Figure 2This utility model provides a structural schematic diagram of the primary cooling pipe of a cooling device for PVC pipe production;

[0018] Figure 3 This utility model proposes a cooling device for PVC pipe production. Figure 2 A schematic diagram of the structure viewed from below;

[0019] Figure 4 This utility model proposes a cooling device for PVC pipe production. Figure 2 A cross-sectional structural diagram.

[0020] Legend: 1. PVC pipe extruder; 2. Secondary cooling pipe; 3. Primary cooling pipe; 4. Mounting base; 5. Electric telescopic rod; 6. Insert bracket; 7. Outer magnetic ring; 8. Cooling column; 9. Screw; 10. Spiral groove; 11. Connecting pipe; 12. Hollow ring; 13. Inner magnetic ring; 14. Air-cooled cavity; 15. Water-cooled cavity; 16. Gear shaft; 17. Gear ring. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] like Figures 1-4 As shown, a cooling device for PVC pipe production includes a PVC pipe extruder 1. A primary cooling pipe 3 is installed at the outlet of the PVC pipe extruder 1, and a secondary cooling pipe 2 is installed at the opening of the primary cooling pipe 3. Cooling columns 8 are arranged inside the primary cooling pipe 3 with clearance fit and coaxial distribution. A screw 9, which is threadedly connected to the outlet of the PVC pipe extruder 1, is installed through the central axis of the cooling columns 8. The inner walls of the primary cooling pipe 3 and the secondary cooling pipe 2 are used for sliding connection with the outer wall of the PVC pipe, and the side of the cooling columns 8 is used for sliding connection with the inner wall of the PVC pipe. The relatively soft pipe material extruded by the PVC pipe extruder 1 is sleeved on the cooling columns 8. The cooling columns 8 provide internal support to ensure shape stability. When passing through the cooling columns 8, the primary cooling pipe 3 cools the material and maintains its basic shape stability. Finally, the secondary cooling pipe 2 achieves final cooling.

[0024] The primary cooling pipe 3 has a spiral groove 10 inside, and connecting pipes 11 are installed through both ends of the spiral groove 10 on the outer wall of the primary cooling pipe 3. Cold air or cold water is injected into the spiral groove 10 through one of the connecting pipes 11 and discharged through the other connecting pipe 11, which facilitates the cooling of the inner wall of the primary cooling pipe 3. Under the action of heat exchange, the pipe material passing through the cooling column 8 is cooled. The inner wall of the secondary cooling pipe 2 has a coaxially distributed air-cooled cavity 14 and water-cooled cavity 15. The openings of the air-cooled cavity 14 and water-cooled cavity 15 are rotatably installed with a hollow ring 12 coaxially arranged with the secondary cooling pipe 2. When the pipe material that has been initially cooled passes through the secondary cooling pipe 2, the cold air and cooling water introduced into the air-cooled cavity 14 and water-cooled cavity 15 are sprayed out through the hollow ring 12 and act on the surface of the pipe material. With the rotation of the hollow ring 12, the surface of the pipe material is covered, achieving comprehensive cooling.

[0025] A coaxially arranged gear ring 17 is fixedly installed at the middle of the outer side of the hollow ring 12. A gear shaft 16, which passes through the water cooling chamber 15 and the air cooling chamber 14, is rotatably connected through the end face of the secondary cooling pipe 2. Two gears are provided on the surface of the gear shaft 16, and the two gears are respectively meshed with the two gear rings 17. In actual use, a motor can be installed at the pipe opening of the secondary cooling pipe 2 to drive the gear shaft 16 to rotate, thereby enabling the gears on its surface to drive the meshed gear rings 17 to rotate, thus realizing the rotation of the hollow ring 12.

[0026] An inner magnetic ring 13 is embedded and fixedly installed at the end of the cooling column 8 away from the PVC pipe extruder 1. An outer magnetic ring 7, which is opposite in polarity to the inner magnetic ring 13, is fixedly installed on the outer wall of the primary cooling pipe 3. The principle of like poles repelling can be used to ensure the support of the suspended end of the cooling column 8.

[0027] The primary cooling pipe 3 and the secondary cooling pipe 2 are divided into two equal halves along the transverse interface. Mounting seats 4 are fixedly installed at the upper and lower positions of the discharge port of the PVC pipe extruder 1. Insert brackets 6 are inserted into the mounting seats 4. The two insert brackets 6 are fixedly installed on the outer walls of the two equal halves of the primary cooling pipe 3 respectively. Electric telescopic rods 5 are set between the insert brackets 6 and the corresponding mounting seats 4. When the PVC pipe extruder 1 is initially working, the two halves of the primary cooling pipe 3 can be separated by retracting the two electric telescopic rods 5, so that the cooling column 8 can be fully exposed to the personnel's view. Therefore, it is convenient for the personnel to operate the pipes extruded by the PVC pipe extruder 1 to be sleeved on the cooling column 8.

[0028] Working principle: Before the PVC pipe extruder 1 is run, the primary cooling pipe 3 and the secondary cooling pipe 2 are separated by the contraction of the electric telescopic rod 5. When the personnel put the pipe extruded by the PVC pipe extruder 1 onto the cooling column 8 and move it along the surface of the cooling column 8, the two halves of the primary cooling pipe 3 re-overlap. Cold air or cold water is injected into the spiral groove 10 from one of the connecting pipes 11 and discharged through the other connecting pipe 11, which facilitates the cooling of the inner wall of the primary cooling pipe 3. Under the action of heat exchange, the pipe passing through the cooling column 8 is cooled down. When the pipe that has been initially cooled passes through the secondary cooling pipe 2, the cold air and cooling water introduced into the air-cooled chamber 14 and the water-cooled chamber 15 are sprayed out through the hollow ring 12 and act on the surface of the pipe. With the rotation of the hollow ring 12, the surface of the pipe is covered, achieving comprehensive cooling.

[0029] The wiring diagrams of the PVC pipe extruder 1 and the electric telescopic rod 5 in this utility model are common knowledge in the field. Their working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the PVC pipe extruder 1 and the electric telescopic rod 5 will not be explained in detail.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A cooling device for PVC pipe production, comprising a PVC pipe extruder (1), characterized in that: A primary cooling pipe (3) is installed at the outlet of the PVC pipe extruder (1). A secondary cooling pipe (2) is installed at the opening of the primary cooling pipe (3). Cooling columns (8) with clearance fit and coaxial distribution are provided inside the primary cooling pipe (3). A spiral groove (10) is opened inside the primary cooling pipe (3), and connecting pipes (11) are installed through the outer wall of the primary cooling pipe (3) at both ends of the spiral groove (10). A coaxially distributed air-cooled cavity (14) and water-cooled cavity (15) are opened on the inner wall of the secondary cooling pipe (2). A hollow ring (12) coaxially arranged with the secondary cooling pipe (2) is rotatably installed at the opening of the air-cooled cavity (14) and the water-cooled cavity (15).

2. The cooling device for PVC pipe production according to claim 1, characterized in that: A screw (9) that is threaded through the central axis of the cooling column (8) and connected to the outlet thread of the PVC pipe extruder (1) is provided.

3. The cooling device for PVC pipe production according to claim 1, characterized in that: The inner walls of the primary cooling pipe (3) and the secondary cooling pipe (2) are used to slide and connect with the outer wall of the PVC pipe, and the side of the cooling column (8) is used to slide and connect with the inner wall of the PVC pipe.

4. The cooling device for PVC pipe production according to claim 1, characterized in that: A coaxially arranged gear ring (17) is fixedly installed at the middle position of the outer side of the hollow ring (12), and a gear shaft (16) that passes through the water cooling chamber (15) and the air cooling chamber (14) is rotatably connected to the end face of the secondary cooling pipe (2).

5. The cooling device for PVC pipe production according to claim 4, characterized in that: The surface of the gear shaft (16) is provided with two gears, and the two gears are respectively meshed with two gear rings (17).

6. The cooling device for PVC pipe production according to claim 1, characterized in that: An inner magnetic ring (13) is embedded and fixedly installed at one end of the cooling column (8) away from the PVC pipe extruder (1), and an outer magnetic ring (7) that is attracted to the inner magnetic ring (13) is fixedly installed on the outer wall of the primary cooling pipe (3).

7. The cooling device for PVC pipe production according to claim 1, characterized in that: The primary cooling pipe (3) and the secondary cooling pipe (2) are divided into two equal halves along the transverse interface. Mounting seats (4) are fixedly installed at the upper and lower positions of the discharge port of the PVC pipe extruder (1). Insert brackets (6) are inserted into the mounting seats (4). The two insert brackets (6) are fixedly installed on the outer walls of the two equal halves of the primary cooling pipe (3) respectively. An electric telescopic rod (5) is provided between the insert bracket (6) and the corresponding mounting seat (4).

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