A heat pipe inner tube with heat insulation effect and an inner tube production equipment

Abstract

The present application belongs to the technical field of inner lining pipe production equipment, and mainly provides a heat pipe inner lining pipe with heat insulation effect and an inner lining pipe production equipment. The heat pipe inner lining pipe comprises an extrusion device, the extrusion device is provided with a sleeve, the sleeve is fixedly connected with first hard pipes which are uniformly distributed in the circumferential direction, the first hard pipes are connected with spray heads, the first hard pipes which are uniformly distributed in the circumferential direction are jointly connected with a first annular shell, the first annular shell is connected with second hard pipes, the second hard pipes are connected with a connecting shell, the sleeve is connected with third hard pipes which are uniformly distributed in the circumferential direction, the third hard pipes which are uniformly distributed in the circumferential direction are jointly connected with a second annular shell, and the sleeve is fixedly connected with a fan. Water is sprayed on the surface of the inner lining pipe through the spray heads which are uniformly distributed in the circumferential direction, and the water adhered to the surface of the inner lining pipe cannot flow down through the fan, so that the uneven cooling of the inner lining pipe caused by the downward movement of the water is avoided, and the mechanical strength of the inner lining pipe during production is prevented from decreasing.

Description

Technical Field

[0001] This invention conforms to the technical field of inner lining pipe production equipment, and in particular, it relates to a thermal pipeline inner lining pipe with heat insulation effect and inner lining pipe production equipment. Background Technology

[0002] A liner pipe is a special type of pipe, usually made of composite materials and inserted into the interior of a pipe made of another material to provide additional protection or improve certain performance characteristics of the pipe. For example, some materials can give the liner pipe heat insulation properties. The production equipment for liner pipes usually includes a series of specially designed mechanical devices that work together to ensure product quality and production efficiency. Several common main pieces of equipment in the production of plastic liner pipes include: extrusion devices, cooling devices, and traction devices. The extrusion device is a machine that heats and plasticizes plastic granules into a molten state and then extrudes them into tubular products through a mold of a specific shape. In order to ensure the dimensional stability and roundness of the pipe, the extruded pipe needs to enter the cooling system immediately. The traction device is used to continuously pull out the formed pipe and send it to the next process.

[0003] Existing cooling devices often cool the inner liner tube by pouring cold water onto it from top to bottom. However, when the cold water comes into contact with the inner liner tube, the upper side of the inner liner tube is in direct contact with the cold water. After heat exchange, the water temperature rises and flows down the inner liner tube. The heated water then exchanges heat with the lower side of the inner liner tube for cooling. This results in different cooling efficiencies on the upper and lower sides of the inner liner tube, which leads to a decrease in the mechanical strength of the inner liner tube and reduces the overall structural strength and service life of the plastic inner liner tube. Summary of the Invention

[0004] To overcome the drawback of uneven cooling during the production of inner lining pipes using existing equipment, this invention provides a thermal pipeline inner lining pipe with heat insulation effect and inner lining pipe production equipment.

[0005] Technical solution: An inner liner tube production equipment includes an extrusion device. A sleeve is provided on one side of the extrusion device. A first rigid tube, evenly distributed circumferentially, is fixedly connected to the sleeve. The first rigid tube passes through the sleeve. A spray head is connected to the side of the first rigid tube located inside the sleeve. The evenly distributed first rigid tubes are connected to a first annular shell. The first annular shell is connected to a second rigid tube. A connecting shell is connected to the side of the second rigid tube away from the first annular shell. The connecting shell is connected to a water supply device. A third rigid tube, evenly distributed circumferentially, is connected to the sleeve. The evenly distributed third rigid tubes are connected to a second annular shell. A fan is fixedly connected to the sleeve. The air inlet of the fan is connected to the second annular shell. The air outlet of the fan is connected to the outside.

[0006] To further explain, the spray head is located on the side of the sleeve away from the extrusion device, the third rigid tube is connected to the sleeve on the side of the sleeve away from the extrusion device, and the water outlet side of the spray head, which is circumferentially evenly distributed, and the air inlet side of the third rigid tube, which is circumferentially evenly distributed, are located on the same vertical plane.

[0007] To further explain, the side of the sleeve closest to the extrusion device is funnel-shaped, which is used to increase the air intake volume on the side of the sleeve closest to the extrusion device.

[0008] To further explain, the sleeve is reduced in diameter on the side closest to the extrusion device to increase the flow rate of gas entering the sleeve.

[0009] To further explain, the spray heads, which are evenly distributed circumferentially, are all tilted toward the side closer to the extrusion device.

[0010] To further explain, the diameter of the third rigid tube, which is circumferentially uniformly distributed, decreases sequentially from top to bottom.

[0011] To further explain, an adjusting plate is slidably connected inside the connecting shell, and the adjusting plate is used to change the communication area of ​​the connecting shell.

[0012] To further explain, a fixed shell is fixedly connected to one side of the connecting shell, and a sliding member that passes through the connecting shell is slidably connected to the fixed shell. The sliding member is fixedly connected to the adjusting plate. The sleeve is provided with a cavity, and the cavity is filled with thermal expansion gas. The cavity and the fixed shell are connected by a flexible tube.

[0013] To further explain, a sliding plate is slidably connected inside the fixed shell, and a spring is provided between the sliding plate and the sliding component. A threaded rod is threadedly connected to the side of the fixed shell away from the connecting shell, and the threaded rod is rotatably connected to the sliding plate.

[0014] To further explain, a thermal pipeline liner with heat insulation effect, according to the aforementioned liner production equipment, includes a liner, the material of which is a composite structure of reinforcing fiber and dynamic vulcanized elastomer, and the liner is formed by one-time co-extrusion, with the inner and outer coating layers being dynamic vulcanized elastomer.

[0015] The beneficial effects of the present invention are as follows: the present invention sprays water onto the surface of the inner liner tube through spray heads that are evenly distributed in the circumference, and uses a fan to prevent the water adhering to the surface of the inner liner tube from flowing downward, thereby avoiding uneven cooling of the inner liner tube due to the downward movement of water, and thus preventing a decrease in the mechanical strength of the inner liner tube.

[0016] This invention reduces the area between the sleeve and the inner liner by narrowing the diameter of the side of the sleeve near the extrusion device, thereby increasing the probability of gas molecules in the airflow coming into contact with the inner liner and improving the cooling efficiency of the airflow on the inner liner. At the same time, the narrowing of the sleeve creates a stronger negative pressure inside the sleeve, which lowers the boiling point of water and increases the evaporation rate of water on the surface of the inner liner, further preventing water on the surface of the inner liner from flowing downwards.

[0017] This invention monitors the temperature inside the sleeve by using thermally expanding gas in the cavity, and adjusts the position of the regulating plate according to the temperature inside the sleeve. This, in turn, adjusts the water output of the spray head according to the temperature of the inner liner tube, achieving the goal of cooling the inner liner tube with minimal water usage and thus saving water. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the sleeve and the first annular shell of the present invention;

[0020] Figure 3 This is a three-dimensional structural cross-sectional view of the sleeve and the second annular shell of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the first rigid tube and spray head of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the slider and sliding plate of the present invention.

[0023] Reference numerals: 1: Extrusion device, 2: Sleeve, 201: Cavity, 3: First rigid tube, 4: Spray head, 5: First annular shell, 6: Second rigid tube, 7: Connecting shell, 8: Third rigid tube, 9: Second annular shell, 10: Fan, 11: Adjusting plate, 12: Fixed shell, 13: Sliding element, 14: Sliding plate, 15: Threaded rod. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0025] When the existing device cools the inner liner tube, the different cooling rates on the upper and lower sides of the inner liner tube will lead to a decrease in the mechanical strength of the inner liner tube, which will reduce the overall structural strength and service life of the plastic inner liner tube.

[0026] Example 1: An inner liner tube production equipment, such as Figures 1-5As shown, it includes an extrusion device 1, which is an existing device that melts and extrudes plastic granules to form a tubular shape. A sleeve 2 is mounted on the right side of the extrusion device 1 via a support. The space inside the sleeve 2 is used to cool the inner liner tube. Six circumferentially evenly distributed first rigid tubes 3 are fixed to the right side of the sleeve 2, penetrating the sleeve 2. A spray head 4 is connected to one side of the first rigid tube 3 inside the sleeve 2. The spray head 4 is used to disperse water into small liquids to cool the inner liner tube, thereby preventing excessive water from falling onto the inner liner tube and flowing downwards. The six... The right side of the first rigid pipe 3 is connected to the first annular shell 5. The upper side of the first annular shell 5 is connected to the second rigid pipe 6. The upper side of the second rigid pipe 6 is connected to the connecting shell 7, which is connected to the water supply device. The water supply device is an existing device used to provide cooling water. The right side of the sleeve 2 is connected to six circumferentially evenly distributed third rigid pipes 8. The right sides of the six third rigid pipes 8 and the left sides of the six spray heads 4 are located in the same vertical plane, so that the airflow can promptly carry away the water mist sprayed by the spray heads 4 onto the inner liner pipe and evaporated. The left sides of the six third rigid pipes 8 are connected to the second annular shell 9. A fan 10 is fixedly connected to the upper side of the sleeve 2. The air inlet of the fan 10 is connected to the second annular shell 9, and the air outlet of the fan 10 is connected to the outside. The spray head 4 is located on the right side of the sleeve 2. The connection point between the third rigid pipe 8 and the sleeve 2 is located on the right side of the sleeve 2, so that the airflow flows from the left side to the right side of the sleeve 2 to pre-cool the inner lining tube. The left side of the sleeve 2 is funnel-shaped to increase the air intake on the left side of the sleeve 2, thereby increasing the cooling rate of the inner lining tube. The left side of the sleeve 2 is narrowed to increase the flow velocity of the gas entering the sleeve 2. At the same time, due to the distance between the sleeve 2 and the inner lining tube... The reduced gaps increase the probability of gas molecules in the airflow contacting the inner liner tube, thereby increasing the heat exchange rate between the airflow and the inner liner tube. The outlets of the six spray heads 4 are all tilted to the left, so that the water mist sprayed from the spray heads 4 can counteract the rightward force of the airflow. The diameters of the six third rigid tubes 8 decrease from top to bottom, with the two upper third rigid tubes 8 having the largest diameters and the two lower third rigid tubes 8 having the smallest diameters. This ensures that when the airflow reaches the six third rigid tubes 8, the upward airflow prevents the water remaining on the surface of the inner liner tube from flowing downwards, thus achieving the purpose of uniformly cooling the inner liner tube.

[0027] like Figure 5 As shown, an adjusting plate 11 is slidably connected inside the connecting shell 7. The adjusting plate 11 is used to change the communication area of ​​the connecting shell 7, thereby adjusting the amount of water sprayed out by the spray head 4, reducing water consumption while cooling the inner liner tube.

[0028] like Figure 4 and Figure 5As shown, a fixed shell 12 is fixedly connected to the front side of the connecting shell 7. A sliding member 13 that passes through the connecting shell 7 is slidably connected inside the fixed shell 12. The sliding member 13 consists of a disc and a rod. The rod part of the sliding member 13 is fixedly connected to the adjusting plate 11. The sleeve 2 is provided with a cavity 201. The cavity 201 is filled with thermal expansion gas. The thermal expansion gas has a relatively sensitive thermal characteristic. When the temperature changes, the thermal expansion gas in the sealed container will generate a large pressure change. The cavity 201 and the fixed shell 12 are connected by a hose.

[0029] like Figure 5 As shown, a sliding plate 14 is slidably connected inside the fixed shell 12. A spring is provided between the sliding plate 14 and the sliding member 13. The spring is used to provide resistance for the sliding member 13 to move forward. A threaded rod 15 is threadedly connected to the front side of the fixed shell 12. The threaded rod 15 is rotatably connected to the sliding plate 14. By rotating the threaded rod 15, the position of the sliding plate 14 is changed, thereby adjusting the initial compression of the adjacent spring.

[0030] When using this equipment, the raw material is added to the extrusion device 1 and heated to melt. Then, it is extruded from the right side of the extrusion device 1 to form an inner liner. Simultaneously, the water supply device and fan 10 are activated, allowing water to flow through the connecting shell 7 into the second rigid pipe 6, then into the first annular shell 5, and then into six first rigid pipes 3. Finally, water mist is sprayed from six spray nozzles 4. At the same time, gas enters from both sides of the sleeve 2. However, because the left side of the sleeve 2 is funnel-shaped, more gas enters from the left side than from the right side. After entering, the gas enters the six third rigid pipes 8, then through the second annular shell 9 into the fan 10, and finally exits from the outlet of the fan 10. During this process, the airflow carries away the water mist that evaporates after cooling the inner liner. The inner liner then enters from the left side of the sleeve 2 and exits from the right side. As the inner liner passes through the sleeve 2, it is pre-cooled by the airflow entering from the left side of the sleeve 2 before exiting from the spray nozzles 4. The water mist sprayed from the mist nozzle 4 cools the inner lining tube, thus preventing direct contact between water and the inner lining tube, which could cause a sudden drop in temperature and stress concentration. Simultaneously, because the third rigid tube 8 on the upper side has a larger diameter, the airflow prevents residual water stains on the surface of the inner lining tube from flowing downwards, ensuring that water on the upper side of the inner lining tube does not affect the temperature on the lower side. This achieves uniform cooling of the inner lining tube and prevents a decrease in mechanical strength due to uneven cooling. When the airflow enters from the left side of the sleeve 2, the smaller space through which the airflow passes increases the probability of air molecules contacting the inner lining tube, thereby increasing the pre-cooling speed of the inner lining tube. After the airflow cools the inner lining tube, its temperature rises, accelerating the evaporation of residual water on the surface of the inner lining tube using hot air, further preventing residual water from flowing downwards and ensuring uneven cooling on both sides of the inner lining tube.

[0031] When the ambient temperature changes, the inner liner tube is cooled by the airflow and then enters the sleeve 2. At this time, the temperature inside the sleeve 2 changes. Taking the temperature rise as an example, the thermally expanding gas in the cavity 201 expands, the air pressure in the cavity 201 increases, and the sliding member 13 moves forward through the hose. The sliding member 13 moves forward and compresses the adjacent spring. At the same time, the sliding member 13 drives the adjusting plate 11 to move forward, so that the connecting area of ​​the connecting shell 7 is larger, thereby increasing the spray volume of the spray head 4 to achieve the purpose of cooling the inner liner tube. Before using this device, the position of the sliding plate 14 is adjusted by rotating the threaded rod 15 according to the water temperature, thereby adjusting the initial compression of the spring adjacent to the sliding plate 14, thereby reducing the initial connecting area of ​​the connecting shell 7 to reduce the amount of water used and achieve the purpose of saving resources. After the production of the inner liner tube is completed, the extrusion device 1, the water supply device and the fan 10 are turned off.

[0032] Example 2: Based on Example 1, a thermal pipeline lining pipe with heat insulation effect, such as... Figure 1 As shown, the inner lining tube production equipment includes an inner lining tube with a composite structure of reinforcing fiber and dynamic vulcanized elastomer. The inner lining tube is formed by one-time co-extrusion, and the inner and outer coatings are dynamic vulcanized elastomers. The continuous length can reach more than 2000 meters. It has a long-term temperature resistance of more than 120℃, is resistant to hydrolysis, and has a low thermal conductivity coefficient. Thus, the inner lining tube has the effect of heat insulation and heat preservation, while also possessing high mechanical properties and good elasticity.

[0033] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A liner tube production equipment, comprising an extrusion device (1), a sleeve (2) provided on one side of the extrusion device (1), a first rigid tube (3) uniformly distributed circumferentially fixed to the sleeve (2), the first rigid tube (3) penetrating the sleeve (2), and a spray head (4) connected to one side of the first rigid tube (3) inside the sleeve (2), characterized in that: It also includes a first annular shell (5), which is fixed to the first rigid pipe (3) which is evenly distributed in the circumference. The first annular shell (5) is connected to a second rigid pipe (6). The side of the second rigid pipe (6) away from the first annular shell (5) is connected to a connecting shell (7). The connecting shell (7) is connected to a water supply device. The sleeve (2) is connected to a third rigid pipe (8) which is evenly distributed in the circumference. The third rigid pipe (8) which is evenly distributed in the circumference is connected to the second annular shell (9). The sleeve (2) is fixed to a fan (10). The air inlet of the fan (10) is connected to the second annular shell (9). The air outlet of the fan (10) is connected to the outside. The sleeve (2) is funnel-shaped on the side near the extrusion device (1) to increase the air intake on the side of the sleeve (2) near the extrusion device (1); The sleeve (2) is reduced in diameter on the side near the extrusion device (1) to increase the flow rate of gas when it enters the sleeve (2); The spray heads (4) that are evenly distributed in the circumference are all tilted toward the side closer to the extrusion device (1); The diameter of the third rigid tube (8), which is circumferentially uniformly distributed, decreases from top to bottom; An adjusting plate (11) is slidably connected inside the connecting shell (7), and the adjusting plate (11) is used to change the communication area of ​​the connecting shell (7). A fixed shell (12) is fixedly connected to one side of the connecting shell (7). The fixed shell (12) is slidably connected to a sliding member (13) that passes through the connecting shell (7). The sliding member (13) is fixedly connected to the adjusting plate (11). The sleeve (2) is provided with a cavity (201). The cavity (201) is filled with thermal expansion gas. The cavity (201) and the fixed shell (12) are connected by a hose.

2. The inner lining tube production equipment according to claim 1, characterized in that: The spray head (4) is located on the side of the sleeve (2) away from the extrusion device (1). The third rigid tube (8) is connected to the sleeve (2) on the side of the sleeve (2) away from the extrusion device (1). The water outlet side of the spray head (4) and the air inlet side of the third rigid tube (8) are located on the same vertical plane.

3. The inner lining tube production equipment according to claim 2, characterized in that: A sliding plate (14) is slidably connected inside the fixed shell (12). A spring is provided between the sliding plate (14) and the sliding member (13). A threaded rod (15) is threadedly connected to the side of the fixed shell (12) away from the connecting shell (7). The threaded rod (15) is rotatably connected to the sliding plate (14).

4. A thermal insulation liner pipe, manufactured using the liner pipe production equipment described in claim 3, characterized in that: It includes an inner liner tube, which is made of a composite structure of reinforcing fiber and dynamic vulcanized elastomer. The inner liner tube is made by one-time co-extrusion molding, and the inner and outer coatings are dynamic vulcanized elastomers.

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