Heat-preservation and energy-saving foaming furnace for foamed plastic

Abstract

The utility model relates to the technical field of foamed plastic processing equipment, in particular to a thermal insulation energy-saving foaming furnace for foamed plastic, which comprises a horizontal furnace and a vertical furnace which are communicated with each other, a driving motor is fixedly mounted on the surface of a mounting plate, a fixing rod penetrates into the vertical furnace and is fixedly sleeved with a first blade, and a second blade is fixedly mounted on the surface of the mounting plate. Rectangular mounting covers are fixedly mounted on the left side wall and the right side wall in the vertical furnace, air outlets are formed in the faces, close to each other, of the two mounting covers, and air inlets are formed in the upper surfaces and the lower surfaces of the mounting covers; and a plurality of rotating shafts are horizontally and rotationally installed in the air outlet at equal intervals, the rotating shafts are fixedly sleeved with baffles, threaded rods are installed in the threaded grooves in a threaded mode, installation plates are fixedly installed at the ends of the multiple threaded rods, and electric telescopic rods are fixedly installed on the upper surface of the installation cover. The size of the air outlet can be adjusted, and after the size of the air outlet is adjusted to be small, the utilization efficiency of hot air can be improved, the hot air circulation effect is enhanced, and energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of foam plastic processing equipment, and in particular to a heat-insulating and energy-saving foaming furnace for foam plastics. Background Technology

[0002] Foamed plastics have been widely used in many fields such as packaging, construction, and transportation due to their many excellent properties such as light weight, heat insulation, sound absorption, and shock absorption. At present, foaming furnace is one of the key equipment in the production process of foamed plastics.

[0003] Existing foaming furnaces are equipped with fan blade assemblies for blowing hot air onto the surface of the foamed sheet. However, because the size of the air outlet in the fan blade assembly is constant and cannot be adjusted, the output speed of the hot air is also constant. As a result, there is a lot of diffusion and loss of hot air in the furnace, which may lead to local overheating or undercooling in the foaming furnace. This increases the need for unnecessary heating adjustments to maintain the overall temperature, resulting in high energy consumption. Utility Model Content

[0004] The purpose of this utility model is to solve the following shortcomings in the prior art: the existing foaming furnace is equipped with a fan assembly for blowing hot air onto the surface of the foamed sheet. However, because the size of the air outlet in the fan assembly is constant and cannot be adjusted, the output speed of the hot air is also constant. There is a lot of diffusion and loss of hot air in the furnace, which may lead to local overheating or undercooling in the foaming furnace. This increases the unnecessary heating adjustments to maintain the overall temperature and results in high energy consumption. Therefore, this utility model proposes a heat-insulating and energy-saving foaming furnace for foamed plastics.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A heat-insulating and energy-saving foaming furnace for foamed plastics includes a horizontal furnace and a vertical furnace connected to each other. A mounting plate is fixedly installed on the left and right side walls of the vertical furnace. A drive motor is fixedly installed on the surface of the mounting plate. A fixing rod is fixedly installed on the output shaft of the drive motor. The fixing rod passes through the vertical furnace and is fixedly fitted with a first blade. A heating component is provided inside the vertical furnace. Rectangular mounting covers are fixedly installed on the left and right side walls of the vertical furnace. Air outlets are opened on the sides of the two mounting covers that are close to each other, and air inlets are opened on the upper and lower surfaces of the mounting covers. The two first blades are located inside the two mounting covers respectively.

[0007] Multiple rotating shafts are equidistantly and horizontally mounted inside the air outlet. A baffle is fixedly sleeved on each rotating shaft. One end of each rotating shaft passes through the mounting cover and has a threaded groove. A threaded rod is threadedly installed in the threaded groove. Mounting plates are fixedly installed at the ends of the multiple threaded rods. An electric telescopic rod is fixedly installed on the upper surface of the mounting cover. The drive shaft of the electric telescopic rod is fixedly connected to the mounting plate.

[0008] Preferably, a heat insulation shell is fixedly installed on the upper surface of the mounting cover, and the two heat insulation shells respectively cover the two electric telescopic rods, with the drive shaft of the electric telescopic rods protruding through.

[0009] Preferably, the top of the horizontal furnace is provided with an exhaust port, and a U-shaped return gas pipe is fixedly connected to the upper surface of the horizontal furnace. The end of the return gas pipe away from the horizontal furnace corresponds to the position of the exhaust port, and a recovery component for drawing in the hot gas discharged from the exhaust port is provided inside the return gas pipe.

[0010] Preferably, the recovery component includes a rotating rod horizontally rotatably installed inside the return gas pipe and a second blade fixedly sleeved on the rotating rod, the rotating rod being controlled to rotate by a transmission component.

[0011] Preferably, the transmission component includes two sprockets and a chain meshing and wound around the two sprockets. One end of the rotating rod extends out of the air return pipe, and the two sprockets are respectively fixedly sleeved on the end of the rotating rod extending out of the air return pipe and on the output shaft of one of the drive motors.

[0012] Preferably, the heating component includes multiple heating rods, which are symmetrically fixedly installed inside the vertical furnace.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The size of the air outlet can be adjusted by the cooperation of the electric telescopic rod, threaded rod, rotating shaft and baffle. Reducing the size of the air outlet can improve the utilization efficiency of hot air, enhance the hot air circulation effect and reduce energy consumption. Attached Figure Description

[0015] Figure 1 This is a partial frontal three-dimensional cross-sectional view of a heat-insulating and energy-saving foaming furnace for foamed plastics proposed in this utility model.

[0016] Figure 2 This is a three-dimensional disassembled structural diagram of the fixing rod and mounting cover in a foam plastic insulation and energy-saving foaming furnace proposed in this utility model.

[0017] Figure 3 This is a partial three-dimensional structural diagram of the mounting cover in a thermal insulation and energy-saving foaming furnace for foamed plastics proposed in this utility model.

[0018] Figure 4 This is a schematic diagram of a partial three-dimensional cross-sectional structure of the return gas pipe in a thermal insulation and energy-saving foaming furnace for foamed plastics proposed in this utility model.

[0019] Figure 5 for Figure 1 Enlarged view of the structure at point A in the middle.

[0020] In the diagram: 1 Horizontal furnace, 2 Vertical furnace, 3 Drive motor, 4 First blade, 5 Heating rod, 6 Mounting cover, 7 Water outlet, 8 Air inlet, 9 Rotating shaft, 10 Baffle, 11 Threaded rod, 12 Mounting plate, 13 Electric telescopic rod, 14 Heat insulation shell, 15 Exhaust port, 16 Return air pipe, 17 Rotating rod, 18 Second blade, 19 Sprocket, 20 Chain, 21 Fixing rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] The terms used in this utility model, such as "upper", "lower", "left", "right", "middle" and "one", are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0023] Reference Figures 1-5 A heat-insulating and energy-saving foaming furnace for foamed plastics includes a horizontal furnace 1 and a vertical furnace 2 connected to each other. Mounting plates are fixedly installed on the left and right side walls of the vertical furnace 2. A drive motor 3 is fixedly installed on the surface of the mounting plates. A fixing rod 21 is fixedly installed on the output shaft of the drive motor 3. The fixing rod 21 passes into the vertical furnace 2 and is fixedly fitted with a first blade 4. A heating component is provided inside the vertical furnace 2, including multiple heating rods 5. The multiple heating rods 5 are symmetrically fixedly installed inside the vertical furnace 2. Rectangular mounting covers 6 are fixedly installed on the left and right side walls of the vertical furnace 2. Air outlets 7 are opened on the side of the two mounting covers 6 that are close to each other, and air inlets 8 are opened on the upper and lower surfaces of the mounting covers 6. Two first blades 4 are located inside the two mounting covers 6 respectively.

[0024] Multiple rotating shafts 9 are equidistantly and horizontally mounted inside the air outlet 7. A baffle 10 is fixedly sleeved on the rotating shaft 9. One end of the rotating shaft 9 passes through the mounting cover 6 and has a threaded groove. A threaded rod 11 is threadedly installed in the threaded groove. A mounting plate 12 is fixedly installed at the end of the multiple threaded rods 11. An electric telescopic rod 13 is fixedly installed on the upper surface of the mounting cover 6. The drive shaft of the electric telescopic rod 13 is fixedly connected to the mounting plate 12.

[0025] Activating multiple heating rods 5 heats the gas located in the vertical furnace 2 and horizontal furnace 1. As the foamed sheet is output from below the vertical furnace 2, the drive motor 3 is activated to control the first blade 4 to rotate. The rotation of the first blade 4 generates suction, drawing the hot gas from the vertical furnace 2 through the two air inlets 8 into the mounting cover 6 and out through the air outlet 7, thus acting on the surface of the foamed sheet. Activating the electric telescopic rod 13 controls the mounting plate 12 to move laterally along with multiple threaded rods 11. Due to the multiple threaded rods... Since rod 11 cannot rotate, multiple rotating shafts 9 will rotate with the cooperation of the threaded rod 11's surface and threaded groove, respectively, carrying multiple baffles 10. The rotation of the baffles 10 adjusts the opening of the air outlet 7. Reducing the opening of the air outlet 7 increases the hot air output speed. According to fluid mechanics principles, with a fixed air volume, the smaller the area of ​​the air outlet 7, the greater the airflow speed. This allows the high-speed hot air to be more concentrated on the surface of the foamed sheet, reducing the diffusion and loss of hot air within the vertical furnace 2, thus improving the efficiency of the hot air output. This method more effectively targets the foamed sheet, improving the utilization efficiency of hot air. This reduces the working time and energy consumption of the heating device while achieving the same foaming effect. Simultaneously, the reduced size of the air outlet 7 increases the airflow velocity in the hot air circulation loop within the vertical furnace 2. This helps to more quickly transfer the heat generated by the heating rod 5 to all parts of the furnace, resulting in a more uniform temperature distribution. This uniform temperature distribution avoids localized overheating or underheating, reducing unnecessary heating adjustments to maintain the overall temperature and thus lowering energy consumption. Furthermore, the excellent hot air circulation allows for full heat recycling within the furnace, reducing the possibility of heat loss from the furnace body to the external environment and improving energy efficiency. The power consumption per unit product is reduced from 1500 kWh to approximately 900 kWh compared to traditional foaming furnaces, significantly reducing production costs. The stable furnace environment and efficient heat utilization make the foaming process smoother and more uniform, increasing production capacity by more than 10% compared to traditional foaming furnaces. Lower energy consumption also means lower carbon emissions, aligning with current environmental protection and energy-saving trends and enhancing the company's social benefits and competitiveness.

[0026] A heat insulation shell 14 is fixedly installed on the upper surface of the mounting cover 6. The two heat insulation shells 14 cover the two electric telescopic rods 13 respectively. The drive shaft of the electric telescopic rod 13 protrudes through. The heat insulation shell 14 can prevent the electric telescopic rod 13 from being affected by high temperature, so that the electric telescopic rod 13 can work stably in the furnace.

[0027] The top of the horizontal furnace 1 is provided with an exhaust port 15. A U-shaped return gas pipe 16 is fixedly connected to the upper surface of the horizontal furnace 1. The end of the return gas pipe 16 away from the horizontal furnace 1 corresponds to the position of the exhaust port 15. The return gas pipe 16 is provided with a recovery component for sucking up the hot gas discharged from the exhaust port 15. The recovery component includes a rotating rod 17 horizontally rotatably installed in the return gas pipe 16 and a second blade 18 fixedly sleeved on the rotating rod 17. The rotating rod 17 is controlled to rotate by a transmission component. The transmission component includes two sprockets 19 and a chain 20 meshing and wound on the two sprockets 19. One end of the rotating rod 17 extends out of the return gas pipe 16. The two sprockets 19 are respectively fixedly sleeved on the end of the rotating rod 17 extending out of the return gas pipe 16 and the output shaft of one of the drive motors 3.

[0028] The hot gas inside the furnace will rise to the surface and be discharged from the exhaust port 15. As the output shaft of the drive motor 3 rotates the first blade 4, the rotating rod 17 will also rotate the second blade 18 under the transmission action of the two sprockets 19 and the chain 20. When the second blade 18 rotates, it will generate a suction force, which can draw part of the hot gas floating out of the exhaust port 15 into the return gas pipe 16 and transport it back into the furnace body. This can realize the recovery and utilization of waste heat, and no additional electric drive device is required, so no additional electricity cost will be generated.

[0029] In this invention, the drive motor 3 is started to drive the first blade 4 to rotate, generating a suction force to draw hot air from the air inlet 8 into the mounting cover 6 in the vertical furnace 2, and then discharge it from the air outlet 7 to act on the surface of the foamed sheet. By starting the electric telescopic rod 13, the mounting plate 12 and the threaded rod 11 are moved laterally. The cooperation between the threaded rod 11 and the threaded groove causes the rotating shaft 9 to drive the baffle 10 to rotate, thereby adjusting the opening of the air outlet 7. After the opening of the air outlet 7 is reduced, the hot air output speed is increased, which can be more concentrated on the foamed sheet, reducing the diffusion and loss of hot air, improving the hot air utilization efficiency, shortening the working time of the heating device, and reducing energy consumption. At the same time, it accelerates the airflow speed of the hot air circulation loop in the vertical furnace 2, making the furnace temperature more uniform, reducing unnecessary heating adjustments, reducing energy consumption, promoting heat recycling, reducing heat loss, and improving energy utilization.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An energy-saving, heat-insulated foaming furnace for foamed plastics, comprising a horizontal furnace (1) and a vertical furnace (2) connected in communication, characterized in that, The vertical furnace (2) is fixedly installed with mounting plates on both the left and right side walls. A drive motor (3) is fixedly installed on the surface of the mounting plate. A fixing rod (21) is fixedly installed on the output shaft of the drive motor (3). The fixing rod (21) passes into the vertical furnace (2) and is fixedly sleeved with a first blade (4). The vertical furnace (2) is equipped with a heating component. A rectangular mounting cover (6) is fixedly installed on both the left and right side walls of the vertical furnace (2). An air outlet (7) is opened on the side of the two mounting covers (6) that are close to each other. An air inlet (8) is opened on the upper and lower surfaces of the mounting cover (6). The two first blades (4) are located in the two mounting covers (6) respectively. Multiple rotating shafts (9) are equidistantly and horizontally installed inside the air outlet (7). A baffle (10) is fixedly sleeved on the rotating shaft (9). One end of the rotating shaft (9) passes through the mounting cover (6) and has a threaded groove. A threaded rod (11) is threadedly installed in the threaded groove. A mounting plate (12) is fixedly installed at the ends of the multiple threaded rods (11). An electric telescopic rod (13) is fixedly installed on the upper surface of the mounting cover (6). The drive shaft of the electric telescopic rod (13) is fixedly connected to the mounting plate (12).

2. The energy-saving and heat-insulating foaming furnace for foamed plastics according to claim 1, characterized in that, A heat insulation shell (14) is fixedly installed on the upper surface of the mounting cover (6), and the two heat insulation shells (14) respectively cover the two electric telescopic rods (13), with the drive shaft of the electric telescopic rods (13) protruding out.

3. The energy-saving and heat-insulating foaming furnace for foamed plastics according to claim 1, characterized in that, The top of the horizontal furnace (1) is provided with an exhaust port (15), and the upper surface of the horizontal furnace (1) is fixedly connected with a U-shaped return gas pipe (16). The end of the return gas pipe (16) away from the horizontal furnace (1) corresponds to the position of the exhaust port (15). The return gas pipe (16) is provided with a recovery component for drawing out the hot gas discharged from the exhaust port (15).

4. The energy-saving and heat-insulating foaming furnace for foamed plastics according to claim 3, characterized in that, The recovery component includes a rotating rod (17) that is horizontally rotatably installed in the return air pipe (16) and a second blade (18) that is fixedly sleeved on the rotating rod (17). The rotating rod (17) is controlled to rotate by a transmission component.

5. The energy-saving, temperature-maintaining foaming oven for foamed plastics according to claim 4, characterized in that, The transmission component includes two sprockets (19) and a chain (20) meshing and wound around the two sprockets (19). One end of the rotating rod (17) extends out of the air return pipe (16). The two sprockets (19) are respectively fixedly sleeved on one end of the rotating rod (17) extending out of the air return pipe (16) and on the output shaft of one of the drive motors (3).

6. The energy-saving, temperature-maintaining foaming oven for foamed plastics according to claim 1, characterized in that, The heating component includes multiple heating rods (5), which are symmetrically fixed inside the vertical furnace (2).

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