A polyethylene pipe sizing and cooling system

Abstract

This utility model relates to the technical field of polyethylene pipe production equipment, and discloses a polyethylene pipe sizing and cooling system, including a water tank. The water tank has openings on both sides for pipes to pass through, and a partition is fixedly connected to the inner wall of the water tank. The interior of the water tank is equipped with a support assembly for supporting the pipes and a spray assembly for spray cooling. This polyethylene pipe sizing and cooling system includes a support assembly. A first sliding block can slide up and down along the mounting frame. With the locking structure of a screw and nut, the height of the hollow heat-conducting tube can be adjusted to ensure that pipes of different diameters are at the center of the liquid annular tube, ensuring uniform spray cooling. Simultaneously, the hollow heat-conducting tube forms a rotating structure with the first sliding block through a bearing, which avoids frictional damage during pipe movement and provides stable support through rolling contact with the pipe surface, preventing pipe deformation.

Description

Technical Field

[0001] This utility model relates to the technical field of polyethylene pipe production equipment, specifically a polyethylene pipe sizing and cooling system. Background Technology

[0002] In the extrusion molding process of polyethylene pipes, the sizing and cooling process is a key step that determines the pipe size and physical properties. The polyethylene pipes that have just been extruded from the extruder are in a high-temperature molten state and need to be cooled by a sizing and cooling system to ensure the outer diameter of the pipes. In the existing technology, the sizing and cooling methods for polyethylene pipes mainly include water cooling and air cooling.

[0003] The prior art patent document CN208497445U provides a polyethylene pipe circulating cooling device, which cools and dries the surface of the polyethylene pipe by placing the polyethylene pipe inside a hollow tube and installing a water supply pipe and an air supply pipe from the upper and lower ends of the hollow tube, respectively.

[0004] While the aforementioned existing technology can cool polyethylene pipes, in actual use, the device lacks a dedicated pipe support structure. Pipes, especially large-diameter ones, are prone to sagging and deformation under their own weight, potentially leading to poor roundness and uneven wall thickness, affecting product quality. Secondly, the cooling process is completely enclosed inside the pipe, making it difficult for heat to dissipate quickly, thus creating a bottleneck in cooling efficiency. Furthermore, the limited internal space makes it difficult for operators to observe the cooling status and surface quality of the pipes, and also complicates subsequent cleaning and maintenance. Therefore, we need a polyethylene pipe sizing and cooling system. Utility Model Content

[0005] The purpose of this invention is to provide a polyethylene pipe sizing and cooling system to solve the problem mentioned in the background art that the cooling device lacks a pipe support mechanism and is prone to pipe deformation.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a polyethylene pipe sizing and cooling system, including a water tank, with channel openings on both sides of the water tank for pipes to pass through, and a partition fixedly connected to the inner wall of the water tank; the interior of the water tank is provided with a support assembly for supporting the pipes and a spray assembly for spray cooling.

[0007] The support assembly includes a mounting frame, and the mounting frame has elongated slots on both sides. A first sliding block is slidably connected to the inner wall of the mounting frame, and screws are fixedly connected to both sides of the first sliding block. One end of the screw extends out of the elongated slot and is threadedly connected to a nut. A bearing is fixedly connected to the inner wall of the first sliding block, and a hollow heat-conducting pipe is provided on the inner wall of the bearing. A second sliding block is rotatably connected to one end of the hollow heat-conducting pipe, and a threaded groove is provided on one side of the second sliding block. An air inlet pipe is threadedly connected to the inner wall of the threaded groove.

[0008] The spray assembly includes a liquid annular tube, and a support column is fixedly connected to the bottom of the liquid annular tube. A nozzle is fixedly connected to the inner side of the liquid annular tube.

[0009] Preferably, a gas annular pipe is fixedly connected to the bottom of the water tank, and an air outlet is fixedly connected to the inner side of the gas annular pipe. There are multiple air outlets, and the multiple air outlets are arranged at equal intervals along the gas annular pipe. A gas pipe interface for connecting to a gas source is fixedly connected to the top of the gas annular pipe, and a drain pipe for discharging wastewater is fixedly connected to the bottom of the water tank.

[0010] Preferably, there are two mounting brackets, which are symmetrically arranged inside the water tank, and the inner wall of the mounting bracket is in contact with the outer wall of the first sliding block.

[0011] Preferably, the first sliding block forms a rotating structure with the hollow heat-conducting pipe through the bearing, and one end of the hollow heat-conducting pipe passes through the bearing and the first sliding block.

[0012] Preferably, there are multiple liquid annular tubes, and the multiple liquid annular tubes are arranged at equal intervals along the direction of pipe travel, and the central axes of the channel opening, the liquid annular tubes and the gas annular tubes coincide.

[0013] Preferably, there are multiple nozzles, and the multiple nozzles are arranged at equal intervals along the inner side of the liquid annular tube, and the liquid outlet of each nozzle has multiple small holes.

[0014] Preferably, a water pipe interface is fixedly connected to the top of the liquid annular pipe, and a water inlet pipe is threadedly connected to the top of the water pipe interface.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0016] First, this utility model is equipped with a support component. The first sliding block can slide up and down along the mounting frame. With the locking structure of the screw and nut, the height of the hollow heat-conducting tube can be adjusted to ensure that tubes of different diameters are in the center of the liquid annular tube, thus ensuring the uniformity of spray cooling. At the same time, the hollow heat-conducting tube forms a rotating structure with the first sliding block through the bearing, which not only avoids friction damage when the tube moves, but also provides stable support through rolling contact with the tube surface, preventing tube deformation. Second, the hollow heat-conducting tube is in direct contact with the high-temperature tube, which can quickly absorb heat from the tube surface. At the same time, compressed air is introduced into the hollow heat-conducting tube through the air inlet pipe to quickly remove the absorbed heat. The combination of contact cooling and subsequent spray cooling forms a dual cooling mechanism, which is beneficial for rapidly reducing the temperature of the tube.

[0017] Secondly, this utility model is equipped with a spray assembly. Multiple liquid annular pipes are arranged at equal intervals along the direction of pipe travel, and multiple nozzles arranged around their inner sides can uniformly spray and cool the pipe from multiple directions. Through the open spray design, compared with closed pipe cooling, the contact area and flow of water and air are increased, allowing heat to be quickly dissipated into the environment and avoiding heat accumulation in the closed space, thereby improving the overall cooling efficiency. In addition, the open water tank structure allows operators to directly observe the cooling process and surface quality of the pipe, and also provides convenience for cleaning and maintenance of the equipment. After spray cooling, the gas blown out by multiple air outlets inside the gas annular pipe can effectively blow off the residual water droplets attached to the surface of the pipe, which facilitates the preliminary drying of the surface of the pipe before it leaves the water tank. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the mounting bracket and the first sliding block of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the first sliding block and the hollow heat-conducting pipe of this utility model;

[0021] Figure 4 This is a schematic diagram of the liquid annular tube and nozzle structure of this utility model.

[0022] The components are as follows: 1. Water tank; 2. Channel opening; 3. Partition; 4. Support assembly; 401. Mounting bracket; 402. Long through groove; 403. First sliding block; 404. Screw; 405. Nut; 406. Bearing; 407. Hollow heat-conducting pipe; 408. Second sliding block; 409. Threaded groove; 410. Air inlet pipe; 5. Spray assembly; 501. Liquid annular pipe; 502. Support column; 503. Nozzle; 504. Water pipe interface; 505. Water inlet pipe; 6. Gas annular pipe; 7. Air outlet; 8. Gas pipe interface; 9. Drain pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-4 As shown, a polyethylene pipe sizing and cooling system includes a water tank 1, with channel openings 2 on both sides of the water tank 1 for the pipe to pass through, and a partition 3 fixedly connected to the inner wall of the water tank 1. The water tank 1 is equipped with a support assembly 4 for supporting the pipe and a spray assembly 5 for spray cooling.

[0025] The support assembly 4 includes a mounting bracket 401, and long through slots 402 are provided on both sides of the mounting bracket 401. A first sliding block 403 is slidably connected to the inner wall of the mounting bracket 401, and screws 404 are fixedly connected to both sides of the first sliding block 403. One end of the screws 404 extends out of the long through slots 402 and is threadedly connected to a nut 405. A bearing 406 is fixedly connected to the inner wall of the first sliding block 403, and a hollow heat-conducting pipe 407 is provided on the inner wall of the bearing 406. A second sliding block 408 is rotatably connected to one end of the hollow heat-conducting pipe 407, and a threaded groove 409 is provided on one side of the second sliding block 408. An air inlet pipe 410 is threadedly connected to the inner wall of the threaded groove 409.

[0026] The spray assembly 5 includes a liquid annular tube 501, and a support column 502 is fixedly connected to the bottom of the liquid annular tube 501. A nozzle 503 is fixedly connected to the inner side of the liquid annular tube 501.

[0027] The above technical solution enables stable support and cooling of pipes of different specifications. The height of the sliding block can be adjusted to match the pipe diameter, ensuring that the pipe is always in the cooling center. At the same time, the hollow heat-conducting pipe 407 can not only support the pipe to prevent deformation, but also remove the heat transferred by the pipe through the internal airflow (entering from the air inlet pipe 410, flowing through the pipe channel and then being discharged). Multiple annularly distributed nozzles 503 can uniformly spray the pipe in multiple directions to improve cooling efficiency and uniformity.

[0028] Specifically, a gas ring pipe 6 is fixedly connected to the bottom of the water tank 1, and an air outlet 7 is fixedly connected to the inner side of the gas ring pipe 6. There are multiple air outlets 7, and the multiple air outlets 7 are arranged at equal intervals along the gas ring pipe 6. A gas pipe interface 8 for connecting to a gas source is fixedly connected to the top of the gas ring pipe 6, and a drain pipe 9 for discharging wastewater is fixedly connected to the bottom of the water tank 1.

[0029] Through the above technical solution, the gas annular pipe 6 can be connected to compressed air or cooling gas and the gas is discharged through multiple annularly distributed air outlets 7. On the one hand, it can dry the surface of the cooled pipe and reduce surface water stains. On the other hand, it can accelerate air circulation and assist in heat dissipation. The partition 3 is set in the water tank 1, dividing the water tank 1 into a spraying area and a drying area. The drying area is also equipped with a support component 4. The bottom of the partition 3 has multiple through holes, so that the wastewater in the drying area can enter the spraying area through the through holes and finally be discharged in time through the drain pipe 9.

[0030] Specifically, there are two mounting brackets 401, and the two mounting brackets 401 are symmetrically arranged in the water tank 1. The inner wall of the mounting bracket 401 is in contact with the outer wall of the first sliding block 403.

[0031] Through the above technical solution, the two mounting brackets 401 can form a stable support structure from both sides of the pipe, improving the support balance; when the first sliding block 403 moves, it drives the two screws 404 to move in the long through groove 402, and the fit design of the first sliding block 403 and the mounting bracket 401 makes the first sliding block 403 more stable and less prone to shaking when moving in the mounting bracket 401; the two sides of the second sliding block 408 are also fixedly connected with screws 404, and the screws 404 extend out of the long through groove 402 of the corresponding mounting bracket 401 and are threadedly connected to the nut 405.

[0032] Specifically, the first sliding block 403 forms a rotating structure with the hollow heat-conducting pipe 407 via the bearing 406, and one end of the hollow heat-conducting pipe 407 passes through the bearing 406 and the first sliding block 403.

[0033] Through the above technical solution, the rotating structure enables the hollow heat-conducting tube 407 to roll synchronously with the tube, transforming the traditional sliding friction into rolling friction and reducing wear on the tube surface; the through design ensures the stability of both ends of the hollow heat-conducting tube 407, while providing a channel for the flow of internal airflow, ensuring heat exchange efficiency.

[0034] Specifically, there are multiple liquid annular tubes 501, and the multiple liquid annular tubes 501 are arranged at equal intervals along the direction of pipe travel, and the central axes of the channel opening 2, the liquid annular tubes 501 and the gas annular tube 6 coincide.

[0035] Through the above technical solution, multiple sets of liquid ring pipes 501 are set up to spray and cool the pipe, so that the pipe gradually cools down during the movement, avoiding internal stress caused by sudden cooling; the design of the central axis coincidence ensures that the pipe always moves along the axis, ensuring the position of each component on the pipe and improving the uniformity of cooling and support.

[0036] Specifically, there are multiple nozzles 503, and the multiple nozzles 503 are arranged at equal intervals along the inner side of the liquid annular tube 501. The liquid outlet of the nozzles 503 has multiple small holes.

[0037] Through the above technical solution, the number of nozzles 503 on the liquid annular pipe 501 is set to eight. The eight equally spaced annularly distributed nozzles 503 can spray the pipe in multiple directions. Moreover, the structure of the small holes can make the water flow smaller, increase the contact area with the pipe, improve the heat exchange efficiency, make the surface temperature of the pipe drop uniformly, and reduce the risk of deformation caused by uneven cooling.

[0038] Specifically, a water pipe interface 504 is fixedly connected to the top of the liquid ring pipe 501, and a water inlet pipe 505 is threadedly connected to the top of the water pipe interface 504.

[0039] Through the above technical solution, the water inlet pipe 505 is connected to the external water source pipeline, and the water flow can be controlled by a valve. At the same time, the water flow can be pressurized by a water pump. The air inlet pipe 410 can be connected to the external compressed air pipeline and controlled by a valve. The air pipe interface 8 on the gas ring pipe 6 can be connected to the external compressed air pipeline and controlled by a valve. The liquid ring pipe 501 is fixed to the bottom of the water tank 1 by the support column 502, and the gas ring pipe 6 is also fixed to the bottom of the water tank 1 by the column, which enhances the stability.

[0040] In use, first, according to the diameter of the polyethylene pipe to be cooled, loosen the nuts 405 on the screws 404 on both sides of the first sliding block 403 and the second sliding block 408 in sequence, and push the first sliding block 403 to move up and down along the mounting bracket 401. During the sliding process, the screws 404 move synchronously with the first sliding block 403 in the long through groove 402. When the first sliding block 403 drives the hollow heat-conducting tube 407 to adjust to a height that matches the diameter of the pipe (i.e., the pipe and the surface of the hollow heat-conducting tube 407 are in contact and at the center of the liquid annular tube 501), tighten the nuts 405 in sequence. 5. Locking the positions of the first sliding block 403 and the second sliding block 408 achieves adaptive support for pipes of different diameters, preventing pipe displacement or deformation. During pipe cooling, an external traction mechanism drives the pipe into the water tank 1 through the channel opening 2 on one side. The pipe first enters the spray cooling zone separated by the partition 3. External liquid enters the liquid annular pipe 501 through the inlet pipe 505, and then is sprayed out through multiple nozzles 503 arranged equidistantly on the inner side, providing multi-directional spray cooling to the pipe. Multiple sets of liquid annular pipes 501 form a progressive cooling zone, allowing the pipe to cool more effectively. The material gradually cools down during its movement to avoid stress concentration caused by sudden cooling and ensure the stability of the pipe's physical properties. As the pipe moves, it comes into contact with the hollow heat-conducting pipe 407, which rolls synchronously with it, converting sliding friction into rolling friction to reduce surface wear. Simultaneously, the high-temperature pipe transfers heat to the hollow heat-conducting pipe 407. External cooling air is introduced into the pipe through the inlet pipe 410; the airflow absorbs heat and is then discharged, providing auxiliary cooling. Subsequently, the pipe, driven by the traction mechanism, enters the drying zone within the water tank 1, and the gas annular pipe 6 passes through its inner side... Air jets from the equidistantly spaced air outlets 7 quickly blow away residual water stains on the pipe surface. At the same time, the airflow accelerates the air circulation inside the water tank 1, helping to remove heat. Finally, the cooled and dried pipe passes through the channel 2 on the other side of the water tank 1, completing the sizing and cooling process. During the process, the operator can observe the surface condition of the pipe through the open structure of the water tank 1. The wastewater generated by the spraying is continuously discharged through the drain pipe 9 at the bottom of the water tank 1. This completes all the work. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polyethylene pipe sizing and cooling system, comprising a water tank (1), characterized in that: The water tank (1) has openings (2) on both sides for pipes to pass through, and the inner wall of the water tank (1) is fixedly connected with a partition (3). The water tank (1) is provided with a support assembly (4) for supporting the pipes and a spray assembly (5) for spray cooling. The support assembly (4) includes a mounting bracket (401), and long through slots (402) are provided on both sides of the mounting bracket (401). A first sliding block (403) is slidably connected to the inner wall of the mounting bracket (401), and screws (404) are fixedly connected to both sides of the first sliding block (403). One end of the screw (404) extends out of the long through slot (402) and is threadedly connected to a nut (405). A bearing (406) is fixedly connected to the inner wall of the first sliding block (403), and a hollow heat-conducting pipe (407) is provided on the inner wall of the bearing (406). A second sliding block (408) is rotatably connected to one end of the hollow heat-conducting pipe (407), and a threaded groove (409) is provided on one side of the second sliding block (408). An air inlet pipe (410) is threadedly connected to the inner wall of the threaded groove (409). The spray assembly (5) includes a liquid ring tube (501), and a support column (502) is fixedly connected to the bottom of the liquid ring tube (501), and a nozzle (503) is fixedly connected to the inner side of the liquid ring tube (501).

2. The polyethylene pipe sizing and cooling system according to claim 1, characterized in that: The bottom of the water tank (1) is fixedly connected to a gas ring pipe (6), and the inside of the gas ring pipe (6) is fixedly connected to an air outlet (7). There are multiple air outlets (7), and the multiple air outlets (7) are arranged equidistantly along the gas ring pipe (6). The top of the gas ring pipe (6) is fixedly connected to a gas pipe interface (8) for connecting to a gas source, and the bottom of the water tank (1) is fixedly connected to a drain pipe (9) for discharging wastewater.

3. The polyethylene pipe sizing and cooling system according to claim 1, characterized in that: The number of mounting brackets (401) is two, and the two mounting brackets (401) are symmetrically arranged in the water tank (1). The inner wall of the mounting bracket (401) is in contact with the outer wall of the first sliding block (403).

4. The polyethylene pipe sizing and cooling system according to claim 1, characterized in that: The first sliding block (403) forms a rotating structure with the hollow heat-conducting pipe (407) through the bearing (406), and one end of the hollow heat-conducting pipe (407) passes through the bearing (406) and the first sliding block (403).

5. A polyethylene pipe sizing and cooling system according to claim 1, characterized in that: The number of liquid annular tubes (501) is multiple, and the multiple liquid annular tubes (501) are arranged at equal intervals along the direction of pipe travel. The central axes of the channel opening (2), the liquid annular tubes (501) and the gas annular tubes (6) coincide.

6. The polyethylene pipe sizing and cooling system according to claim 1, characterized in that: The number of nozzles (503) is multiple, and the multiple nozzles (503) are arranged at equal intervals along the inner side of the liquid annular tube (501). The liquid outlet of the nozzles (503) has multiple small holes.

7. A polyethylene pipe sizing and cooling system according to claim 1, characterized in that: The top of the liquid ring pipe (501) is fixedly connected to a water pipe interface (504), and the top of the water pipe interface (504) is connected to a water inlet pipe (505) by a thread.

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