A cooling device for HDPE double wall pipe

Abstract

A cooling device for HDPE double-wall pipe, including trailer, be equipped with water tank and fan on trailer, fan air outlet is equipped with water mist nozzle, water mist nozzle is connected water tank through hose, be connected with water pump on hose. The utility model discloses a cooling device for HDPE double-wall pipe, including trailer, be equipped with water tank and fan on trailer, fan air outlet is equipped with water mist nozzle, water mist nozzle is connected water tank through hose, be connected with water pump on hose.

Description

Technical Field

[0001] This utility model relates to a cooling device for HDPE double-wall pipes. Background Technology

[0002] HDPE double-wall pipes are widely used in municipal drainage, industrial water supply networks, and agricultural irrigation due to their excellent properties such as high strength, corrosion resistance, and aging resistance. Among them, large-diameter HDPE double-wall pipes have become an important pipe material in infrastructure construction because they are suitable for large-flow transportation needs.

[0003] After large-diameter HDPE double-wall pipes are extruded, the initial temperature of the pipe wall is high. It needs to be cooled to a suitable temperature before subsequent cutting can proceed. If cut directly without sufficient cooling, stress concentration can occur due to the temperature difference between the inside and outside of the pipe wall, leading to quality problems such as cracking and deformation. Currently, the industry commonly uses a single air-cooling method, which involves blowing room-temperature air onto the high-temperature pipe wall using a fan, relying on air convection for heat transfer. However, this cooling method has the following technical problems: 1. Low cooling efficiency and long core equipment occupancy time: Air heat exchange efficiency is limited, and single-air cooling requires a long time to bring large-diameter HDPE double-wall pipes to the required cutting temperature. To prevent pipe deformation due to its own weight or temperature stress during cooling, the pipes need to be fixed on a rotary cutting table, which drives the pipes to rotate slowly, resulting in the rotary cutting table being occupied for a long time. As the core processing equipment of the HDPE double-wall pipe production line, the rotary cutting table is usually only equipped with a few units per production line. Its long-term occupancy directly leads to the inability to cut the subsequently formed pipes in a timely manner, seriously restricting the overall capacity and production efficiency of the production line.

[0004] 2. Poor cooling uniformity and high risk of pipe deformation: Large-diameter HDPE double-wall pipes have a large circumference, and the airflow coverage of single air cooling is limited, which easily leads to local differences in the cooling rate of the pipe wall. Some areas cool too fast and some areas cool too slowly. Moreover, the cooling cycle is long, and the pipe may still deform due to uneven local temperature stress during rotation, increasing the probability of product quality failure. Utility Model Content

[0005] The purpose of this invention is to provide a cooling device for HDPE double-wall pipes, which solves the problem that the existing HDPE double-wall pipe cooling requires a long time to occupy a rotary cutting table, affecting production efficiency.

[0006] To solve the above problems, the technical solution of this utility model is as follows: A cooling device for HDPE double-wall pipes includes a trailer, on which a water tank and a fan are mounted. The fan outlet is equipped with a water mist nozzle, which is connected to the water tank via a hose. A water pump is connected to the hose.

[0007] Furthermore, the fan outlet is connected to two branch pipes via a T-junction, and water mist nozzles are installed inside the branch pipes.

[0008] Furthermore, the branch pipe is connected to a universal ball tube.

[0009] Furthermore, a lifting mechanism is provided on the trailer, and the water tank and fan are placed on the lifting mechanism.

[0010] Furthermore, the lifting mechanism is a scissor lift structure.

[0011] Furthermore, a level switch is installed inside the water tank. The level switch is connected to the input terminal of the level controller via a cable, and the output terminal of the level controller is connected to the output terminal of the alarm via a cable.

[0012] Furthermore, the fan is a centrifugal fan.

[0013] The beneficial effects of this utility model are as follows: 1. A water pump delivers cooling water from the tank to the water mist nozzles, forming a fine water mist. A fan directs the water mist through the exhaust duct to the surface of the high-temperature HDPE double-walled pipe. Upon contact with the pipe wall, the water mist evaporates rapidly, efficiently carrying away heat using the principle of "evaporation heat absorption." Simultaneously, the forced airflow from the fan accelerates heat exchange on the pipe wall surface. This dual action significantly reduces the cooling time, correspondingly decreasing the time the rotary cutting table is occupied. This allows for a quick switch to the next pipe cutting operation, effectively alleviating production capacity bottlenecks caused by the cooling process.

[0014] 2. Water mist has the characteristics of wide coverage and uniform heat exchange. It can form a uniform cooling layer on the pipe wall surface, avoiding the problem of excessive local temperature difference on the pipe wall caused by single air cooling, reducing the possibility of pipe deformation due to uneven temperature stress, and improving product quality stability. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 2 This is a three-dimensional structural diagram of the present invention. Figure 3 This is a schematic diagram of the main structure of this utility model. Figure 4 This is a cross-sectional structural diagram of the universal ball tube of this utility model.

[0016] In the diagram: 1. Trailer; 2. Lifting mechanism; 3. Fan; 4. T-pipe; 5. Branch pipe; 6. Water mist nozzle; 7. Universal ball pipe; 8. Water pump; 9. Water tank; 10. Liquid level controller; 11. Hose; 12. Liquid level switch; 13. Alarm. Detailed Implementation

[0017] 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.

[0018] like Figures 1 to 4 As shown, a cooling device for HDPE double-wall pipes includes a trailer 1, a water tank 9 and a fan 3 on the trailer 1, a water mist nozzle 6 at the air outlet of the fan 3, the water mist nozzle 6 being connected to the water tank 9 via a hose, and a water pump 8 being connected to the hose.

[0019] During implementation, workers move the device back and forth on one side of the double-walled pipe using a trailer 1. During the movement, a water pump delivers water from the water tank 9 to the water mist nozzle 6, forming a fine water mist. The fan 3 blows the water mist onto the surface of the HDPE double-walled pipe. The water mist evaporates quickly upon contact with the high-temperature pipe wall, and the airflow from the fan 3 accelerates the removal of heat. The dual effect of "evaporation heat absorption + forced air cooling" significantly shortens the cooling time (cooling can be completed in half an hour), thereby reducing the time the rotary cutting table occupies and improving overall production efficiency.

[0020] Furthermore, the air outlet of the fan 3 is connected to two branch pipes 5 via a three-way pipe 4, and the water mist nozzle 6 is installed inside the branch pipes 5. Traditional single-outlet air ducts can only cover a local area of ​​the pipe, which can easily lead to "fast cooling in some areas and slow cooling in others," thus causing pipe deformation. In this patent, the two branch pipes 5 can be aligned with different circumferential positions of the pipe, and the water mist is sprayed synchronously through the two branch pipes 5 to achieve "wide coverage" of the pipe surface, avoiding excessive local temperature differences and reducing the risk of cooling deformation.

[0021] Furthermore, a universal ball tube 7 is connected to the branch pipe 5, and the structure of the universal ball tube 7 is as follows: Figure 4 As shown, it includes a spherical inner tube, with a spherical sleeve surrounding the inner tube. The universal ball tube 7 can be manually or mechanically adjusted to change the air outlet angle, allowing the water mist airflow to precisely cover the "key heat-generating areas" of the tube (such as thicker walls or welded joints) or to adapt to the surface curvature of tubes of different diameters. This avoids the problem of "water mist not reaching the tube, resulting in ineffective cooling," reduces the workload of operators, and improves the flexibility of cooling operations.

[0022] Furthermore, a lifting mechanism 2 is provided on the trailer 1, and the water tank 9 and fan 3 are placed on the lifting mechanism 2. The center height difference between large-diameter HDPE double-wall pipes (e.g., 1 meter in diameter) and small-diameter pipes (e.g., 30 centimeters in diameter) is significant. If the cooling system height is fixed, problems may arise such as "nozzles too high (water mist cannot reach the surface of the small pipe)" or "nozzles too low (water mist can only reach the bottom of the large pipe wall)". The lifting mechanism 2 can adjust the overall height of the cooling system according to the actual height of the pipe, ensuring that the water mist nozzles 6 are always aligned with the core cooling area of ​​the pipe (e.g., the middle of the pipe wall), guaranteeing uniform and effective cooling for pipes of different specifications.

[0023] Furthermore, the lifting mechanism 2 is a scissor lift structure. The water tank 9 (which is heavy when full) and the fan 3 are both heavy-duty components. The scissor structure achieves lifting and lowering through the extension and retraction of the cross arms, providing stronger load-bearing capacity and stability compared to other structures (such as a single hydraulic rod). This avoids nozzle position misalignment and uneven water mist spraying caused by "cooling system swaying" during lifting. Simultaneously, the scissor structure has a uniform lifting stroke, allowing for precise control of the cooling system's height and preventing sudden increases or decreases in height from affecting the cooling effect.

[0024] Furthermore, a level switch 12 (e.g., WIKA ELS type) is installed inside the water tank 9. The level switch 12 is connected to the input terminal of the level controller 10 (e.g., Omron 61F-G1) via a cable, and the output terminal of the level controller 10 is connected to the output terminal of the alarm 13 (e.g., an audible and visual alarm) via a cable. If the water tank 9 is short of water, the water pump cannot deliver water, the water mist nozzle 6 will stop spraying water, and the cooling system will degenerate into "pure air cooling" (efficiency will drop significantly, which may lead to longer cooling time and occupation of the cutting table), and the operator will find it difficult to detect the water shortage in real time. The level switch 12 can monitor the water level in the water tank 9 in real time. When the water level is lower than the set threshold (e.g., "minimum safe water level"), it will send a signal to the level controller 10, and the controller will trigger the alarm 13 (e.g., an audible and visual alarm) to promptly remind the operator to add water, avoid cooling interruption or efficiency reduction due to water shortage, and ensure the continuity and effectiveness of the cooling process.

[0025] Furthermore, the fan 3 is a centrifugal fan 3. HDPE double-wall pipes (especially large-diameter pipes) have a large wall area, and there may be a situation where "the pipe is some distance from the cooling device," requiring sufficient air pressure to deliver water mist to the pipe wall surface. Compared to other types of fans 3, the centrifugal fan 3 has the characteristics of high air pressure and stable air volume, ensuring that the water mist can cover the entire pipe wall "evenly and over a long distance," avoiding the problem of "insufficient airflow causing water mist to disperse and only providing localized cooling."

[0026] The embodiments described in this specification are merely examples of implementations of the inventive concept. The scope of protection of this utility model should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A cooling device for HDPE double-wall pipes, characterized in that: Includes a trailer (1), on which a water tank (9) and a fan (3) are provided. The air outlet of the fan (3) is provided with a water mist nozzle (6). The water mist nozzle (6) is connected to the water tank (9) through a hose (11). A water pump (8) is connected to the hose (11).

2. The cooling device for HDPE double-wall pipe according to claim 1, characterized in that: The air outlet of the fan (3) is connected to two branch pipes (5) through a three-way pipe (4), and the water mist nozzle (6) is installed inside the branch pipe (5).

3. The cooling device for HDPE double-wall pipe according to claim 2, characterized in that: The branch pipe (5) is connected to the universal ball pipe (7).

4. A cooling device for HDPE double-wall pipes according to any one of claims 1 to 3, characterized in that: A lifting mechanism (2) is provided on the trailer (1), and a water tank (9) and a fan (3) are placed on the lifting mechanism (2).

5. The cooling device for HDPE double-wall pipe according to claim 4, characterized in that: The lifting mechanism (2) is a scissor lift structure.

6. A cooling device for HDPE double-wall pipes according to any one of claims 1 to 3, characterized in that: A level switch (12) is provided in the water tank (9). The level switch (12) is connected to the input terminal of the level controller (10) via a cable. The output terminal of the level controller (10) is connected to the output terminal of the alarm (13) via a cable.

7. A cooling device for HDPE double-wall pipes according to any one of claims 1 to 3, characterized in that: The fan (3) is a centrifugal fan.

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