Raw material mixing and drying device for PE pipe production
By introducing air intakes, gas pipelines, and dehydration mechanisms into the PE pipe production equipment, the high-temperature gas can be recycled, solving the problem of low heat utilization in existing equipment, reducing production costs, and improving drying efficiency.
Patent Information
- Application Number
- CN202422966942.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-03
AI Technical Summary
The existing PE pipe production raw material mixing and drying device cannot effectively recycle and utilize the high-temperature gas discharged from the device after drying, resulting in low heat energy utilization and increased production costs.
A device was designed that includes a mixing tank, a stirring mechanism, an air intake, an induced draft fan, an air delivery pipeline, and a dehydration mechanism. High-temperature gas is extracted through the air intake, treated by the dehydration mechanism, and then recycled to achieve heat recovery. The device also automatically adjusts the use of the heater and the adsorption tank through a controller and sensors to ensure the drying effect.
This improved the energy utilization rate of hot air, reduced the electricity consumption and cost of PE pipe production, and ensured the stability and efficiency of raw material mixing and drying.
Smart Images
Figure CN223478041U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of PE pipe production equipment, specifically a raw material mixing and drying device for PE pipe production. Background Technology
[0002] my country's plastic pipe industry has developed rapidly, and product quality is constantly improving. PE (polyethylene) pipes, in particular, are widely used in urban water supply, urban gas supply, and farmland irrigation due to their unique advantages of high strength, corrosion resistance, and non-toxicity. The main raw material used in the production of PE pipes is high-density polyethylene, supplemented with color masterbatches, antioxidants, antistatic additives, and other auxiliary materials to adjust the pipe's color and improve its protective properties. During the production of PE pipes, these raw materials must first be mixed evenly and then dried. Even mixing prevents surface defects such as color differences and streaks in the pipes, and ensures the quality stability of the same batch of products. Drying prevents moisture from mixing into the raw materials and generating bubbles during melting, thus avoiding any impact on the product's performance.
[0003] Existing PE pipe manufacturing raw material mixing and drying devices typically involve creating an air inlet in a mixing tank equipped with a stirring mechanism, installing heating elements at the inlet, and then mounting an induced draft fan on the mixing tank. The fan continuously draws air from inside the tank, forcing outside air in through the inlet. This air is heated by the heating elements, drying the raw materials, and then exhausted by the fan. This process of mixing and drying the raw materials is repeated. However, existing devices cannot recover and reuse the high-temperature gas discharged after drying, resulting in low energy efficiency and increased production costs for PE pipes. Therefore, a PE pipe manufacturing raw material mixing and drying device that can recover and reuse the high-temperature gas discharged after drying is needed. Utility Model Content
[0004] To address the above technical problems, this utility model provides a raw material mixing and drying device for PE pipe production that can recycle and utilize the high-temperature gas discharged from the device after drying, thereby solving the problem of low heat energy utilization rate of high-temperature gas in existing raw material mixing and drying devices for PE pipe production, which leads to increased production costs of PE pipes.
[0005] To solve the above technical problems, the technical solution of this utility model is as follows: a raw material mixing and drying device for PE pipe production, comprising a mixing box, a feeding hopper fixedly connected to the top of the mixing box, a stirring mechanism installed inside the mixing box, a partition plate fixedly connected below the stirring mechanism inside the mixing box, a plurality of through holes opened on the partition plate, a discharge port connected to the bottom of the partition plate, an air intake port opened on one side of the top of the mixing box, an induced draft fan fixedly connected to the air intake port through a pipe, an air supply pipe fixedly connected to the output end of the induced draft fan, an electric heater installed on the air supply pipe, and the other end connected to a deodorizer. The water removal mechanism includes a diffuser plate below the partition plate, an air inlet pipe fixedly connected to the bottom of the diffuser plate, the air inlet pipe extending through and out of the bottom of the mixing tank, and the other end fixedly connected to the output end of the water removal mechanism. The water removal mechanism includes a first adsorption tank and a second adsorption tank. The input ends of the first adsorption tank and the second adsorption tank are fixedly connected to the air supply pipe via a solenoid three-way valve, and the output ends are fixedly connected to the air inlet pipe via a three-way connector. A humidity sensor is installed on the air inlet pipe, and the humidity sensor is communicatively connected to the controller. The solenoid three-way valve is controlled by the controller.
[0006] Furthermore, the stirring mechanism includes a stirring motor and a stirring paddle. The stirring motor is fixedly connected to the upper side of the mixing tank, and both ends of the stirring paddle are rotatably connected to the inner wall of the mixing tank. One end of the stirring paddle extends through the mixing tank and is fixedly connected to the output end of the stirring motor.
[0007] Furthermore, the partition plate is V-shaped, and the upper end of the discharge port is fixedly connected to the lower end of the partition plate.
[0008] Furthermore, an electric unloading valve is installed at the lower end of the feed hopper.
[0009] Furthermore, a filter screen is fixedly connected inside the air intake, a temperature sensor is installed on the air supply pipe, the temperature sensor is communicatively connected to the controller, and the electric heater is controlled by the controller.
[0010] Furthermore, a support leg is fixedly connected to the bottom of the mixing box.
[0011] This utility model has the following advantages compared with the prior art:
[0012] 1. This utility model, by setting up an air conveying pipeline, an induced draft fan, a water removal mechanism, and an air inlet pipeline, draws hot air from the mixing tank through the air conveying pipeline. After the water removal mechanism removes the water vapor, the hot air is transported back into the mixing tank through the air inlet pipeline. This realizes the recovery and utilization of the residual heat of the hot air in the device, avoids the problem of low heat utilization caused by direct discharge of hot air, improves the energy utilization rate of hot air during the raw material mixing and drying process, and saves the production cost of PE pipes.
[0013] 2. This utility model, by setting two adsorption tanks (a first adsorption tank and a second adsorption tank) in the dehydration mechanism, allows for one tank to be used while the other is in operation. A humidity sensor and a solenoid three-way valve are installed, and the controller automatically switches between the two adsorption tanks, preventing adverse effects on the raw material drying effect due to problems with the adsorption tanks in the dehydration mechanism. Furthermore, by installing a temperature sensor on the air supply pipeline, when the hot air temperature reaches the temperature required to dry the raw material, the controller shuts off the electric heater to stop heating the hot air. When the hot air temperature drops below the set temperature, the electric heater is turned on again to reheat the hot air, saving energy consumption during the raw material mixing and drying process and further reducing the production cost of PE pipes. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model.
[0015] In the diagram: 1. Mixing box, 2. Feed hopper, 3. Divider plate, 4. Discharge port, 5. Air inlet, 6. Exhaust fan, 7. Air supply pipe, 8. Electric heater, 9. Diffuser plate, 10. Air inlet pipe, 11. First adsorption tank, 12. Second adsorption tank, 13. Solenoid three-way valve, 14. Humidity sensor, 15. Stirring motor, 16. Stirring paddle, 17. Electric discharge valve, 18. Temperature sensor, 19. Support leg. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings.
[0017] like Figure 1The apparatus shown is a raw material mixing and drying device for PE pipe production. It includes a mixing tank 1, with a feed hopper 2 fixedly connected to the top. A stirring mechanism is installed inside the mixing tank 1. A partition plate 3 is fixedly connected below the stirring mechanism inside the mixing tank 1, dividing the mixing tank 1 into upper and lower parts. The partition plate 3 has several through holes for hot air to pass through, the diameter of which is smaller than the particle size of the raw materials added to the mixing tank 1. An outlet 4 is connected to the bottom of the partition plate 3, and a valve is installed on the outlet 4. An air intake 5 is located on one side of the top of the mixing tank 1, and an induced draft fan 6 is fixedly connected to the air intake 5 via a pipe. An air supply pipe 7 is fixedly connected to the output end of the induced draft fan 6, and an electric heater 8 is installed on the air supply pipe 7, with the other end connected to a dehydration mechanism. Both the induced draft fan 6 and the electric heater 8 are fixedly connected to the upper part of the mixing tank 1. A diffuser plate 9 is installed below the partition plate 3. A diffuser plate 9 is used to disperse the blown airflow. An air inlet pipe 10 is fixedly connected to the bottom of the diffuser plate 9. The air inlet pipe 10 passes through and extends out of the bottom of the mixing box 1, and its other end is fixedly connected to the output end of the dewatering mechanism. The dewatering mechanism includes a first adsorption tank 11 and a second adsorption tank 12. Both the first adsorption tank 11 and the second adsorption tank 12 are filled with water-absorbing silica gel. The input ends of the first adsorption tank 11 and the second adsorption tank 12 are fixedly connected to the air supply pipe 7 through an electromagnetic three-way valve 13. The output ends of the first adsorption tank 11 and the second adsorption tank 12 are fixedly connected to the air inlet pipe 10 through a three-way connector. A check valve is also installed on the output end pipes of the first adsorption tank 11 and the second adsorption tank 12 to prevent gas from flowing back into the tank from the output end side. A humidity sensor 14 is installed on the air inlet pipe 10. The humidity sensor 14 is communicatively connected to the controller. The electromagnetic three-way valve 13 is controlled by the controller.
[0018] In order to stir and agitate the raw materials in the mixing tank 1 and mix them evenly, the stirring mechanism includes a stirring motor 15 and a stirring paddle 16. The stirring motor 15 is fixedly connected to the upper side of the mixing tank 1, and the two ends of the stirring paddle 16 are rotatably connected to the inner wall of the mixing tank 1. One end of the stirring paddle 16 extends through the mixing tank 1 and is fixedly connected to the output end of the stirring motor 15.
[0019] To facilitate the discharge of materials from the discharge port 4 after mixing and drying, the partition plate 3 is V-shaped, and the upper end of the discharge port 4 is fixedly connected to the lower end of the partition plate 3.
[0020] In order to facilitate the entry of raw materials in the feed hopper 2 into the mixing box 1, and to prevent the hot air in the mixing box 1 from escaping out of the mixing box 1 from the opening of the feed hopper 2, an electric unloading valve 17 is installed at the lower end of the feed hopper 2.
[0021] To prevent raw material particles in the mixing box 1 from being sucked into the air intake 5, a filter screen is fixedly connected inside the air intake 5. To achieve automated control of the electric heater 8, a temperature sensor 18 is installed on the air supply pipe 7. The temperature sensor 18 is connected to the controller, and the electric heater 8 is controlled by the controller.
[0022] In order to support the mixing tank 1 and improve the overall stability of the device, the bottom of the mixing tank 1 is fixedly connected with support legs 19, and four support legs 19 are symmetrically arranged.
[0023] The specific working process of this utility model is as follows:
[0024] After weighing all the raw materials required for producing this batch of PE pipes according to the specified ratio, they are added to the feed hopper 2. The electric discharge valve 17 in the feed hopper 2 rotates, continuously adding raw materials to the mixing tank 1, where they fall onto the partition plate 3. The stirring motor 15, the induced draft fan 6, and the electric heater 8 are started. The stirring motor 15 rotates, driving the stirring paddle 16 to rotate, stirring and mixing the raw materials on the partition plate 3. The induced draft fan 6 continuously draws air from the air intake 5 into the mixing tank 1, through the air supply pipe 7, and through the electric heater 8 to heat the air. The heated air then re-enters the mixing tank 1 through the air intake pipe 10 and the diffuser plate 9, blowing towards the bottom of the partition plate 3. The hot air enters the top of the partition plate 3 through the through holes, further heating the raw materials and accelerating the process. As the moisture carried in the mixture evaporates, the hot air leaves the mixing box 1 through the filter at the air intake 5 and enters the blower 6, carrying away the evaporated water vapor. The water vapor is adsorbed by the silica gel in the first adsorption tank 11 of the dehydration mechanism as the hot air flows through it, separating the water vapor from the hot air. The hot air leaves the first adsorption tank 11 and enters the diffuser plate 9 through the air intake pipe 10, blowing towards the bottom of the partition plate 3. This cycle continues to dry the raw materials on the partition plate 3. After a period of time, the raw materials are mixed and dried. The valve on the discharge port 4 is opened to discharge the material from the discharge port 4. The valve on the discharge port 4 is then closed, and the next batch of raw materials to be processed is added back into the feed hopper 2 for mixing and drying again.
[0025] During the mixing and drying process of raw materials, temperature sensor 18 detects the temperature of hot air passing through gas pipeline 7 and sends the temperature value signal to the controller. Whenever the temperature reaches the upper limit set by the controller, the controller controls the electric heater 8 to turn off, saving power consumption; whenever the temperature reaches the lower limit set by the controller, the controller controls the electric heater 8 to turn on, heating the circulating airflow.
[0026] During the mixing and drying process of raw materials, the humidity sensor 14 detects the moisture content in the hot air entering the air inlet pipe 10 from the dehydration mechanism and sends the humidity value signal to the controller. When the humidity signal value exceeds the upper limit of humidity set in the controller, the controller controls the electromagnetic three-way valve 13 to change the direction of the outlet, changing the direction of the hot air output from the air supply pipe 7 from entering the first adsorption tank 11 to entering the second adsorption tank 12. During the inspection, the operator replaces the water-absorbing silica gel in the first adsorption tank 11 in a timely manner. When the humidity signal value exceeds the upper limit of humidity set in the controller again, the controller controls the electromagnetic three-way valve 13 to change the direction of the outlet again, changing the direction of the hot air output from the air supply pipe 7 from entering the second adsorption tank 12 back to entering the first adsorption tank 11. This cycle is repeated to avoid affecting the drying effect of the raw materials.
Claims
1. A raw material mixing and drying device for PE pipe production, comprising a mixing tank (1), wherein a feeding hopper (2) is fixedly connected to the top of the mixing tank (1) and a stirring mechanism is provided inside, characterized in that: A partition plate (3) is fixedly connected inside the mixing tank (1) below the stirring mechanism. The partition plate (3) has several through holes. The bottom of the partition plate (3) is connected to a discharge port (4). An air intake (5) is provided on one side of the top of the mixing tank (1). The air intake (5) is fixedly connected to an induced draft fan (6) through a pipe. The output end of the induced draft fan (6) is fixedly connected to an air supply pipe (7). An electric heater (8) is installed on the air supply pipe (7), and the other end is connected to a dewatering mechanism. A diffuser plate (9) is provided below the partition plate (3). An air inlet pipe (10) is fixedly connected to the bottom of the diffuser plate (9). The air intake pipe (10) passes through and extends out of the bottom of the mixing tank (1), and its other end is fixedly connected to the output end of the dewatering mechanism. The dewatering mechanism includes a first adsorption tank (11) and a second adsorption tank (12). The input ends of the first adsorption tank (11) and the second adsorption tank (12) are fixedly connected to the air supply pipe (7) through an electromagnetic three-way valve (13), and the output ends are fixedly connected to the air intake pipe (10) through a three-way connector. A humidity sensor (14) is installed on the air intake pipe (10). The humidity sensor (14) is communicatively connected to the controller. The electromagnetic three-way valve (13) is controlled by the controller.
2. The raw material mixing and drying device for PE pipe production according to claim 1, characterized in that: The stirring mechanism includes a stirring motor (15) and a stirring paddle (16). The stirring motor (15) is fixedly connected to the upper side of the mixing tank (1). Both ends of the stirring paddle (16) are rotatably connected to the inner wall of the mixing tank (1). One end of the stirring paddle (16) extends through the mixing tank (1) and is fixedly connected to the output end of the stirring motor (15).
3. The raw material mixing and drying device for PE pipe production according to claim 1, characterized in that: The partition plate (3) is V-shaped, and the upper end of the discharge port (4) is fixedly connected to the lower end of the partition plate (3).
4. The raw material mixing and drying device for PE pipe production according to claim 1, characterized in that: An electric unloading valve (17) is installed at the lower end of the feed hopper (2).
5. The raw material mixing and drying device for PE pipe production according to claim 1, characterized in that: A filter screen is fixedly connected inside the air intake (5), a temperature sensor (18) is installed on the air supply pipe (7), the temperature sensor (18) is communicatively connected to the controller, and the electric heater (8) is controlled by the controller.
6. The raw material mixing and drying device for PE pipe production according to claim 1, characterized in that: The bottom of the mixing box (1) is fixedly connected to a support leg (19).