A phosphorus-free plastic raw material melting furnace equipment

Abstract

This utility model discloses a phosphate-free plastic raw material melting furnace device, including a melting tank fixed on a main support frame with its opening facing upwards, and an electromagnetic induction heating coil wound around the outside of the melting tank; a melting tank discharge pipe connected to the bottom of the melting tank and a discharge control valve on the melting tank discharge pipe; a vertically extending auxiliary support column above the melting tank, the upper end of which is fixedly connected to the main support frame; and a melting and stirring mechanism above the melting tank. This melting furnace device is highly efficient and energy-saving, capable of heating phosphate-free plastic raw materials to the required melting temperature in a short time, improving production efficiency and reducing production time and energy consumption per unit product; the split stirring rods in the melting and stirring mechanism, under the combined rotation of the melting and stirring support ring and the split stirring support column, utilize multiple split stirring rods to fully stir the phosphate-free plastic inside the melting tank, making the phosphate-free plastic more evenly heated during the melting process.

Description

Technical Field

[0001] This utility model relates to the field of plastic melting technology, specifically to a phosphorus-free plastic raw material melting furnace equipment. Background Technology

[0002] Phosphorus-free plastics generally refer to plastic materials that do not contain phosphorus-based additives. These materials typically possess good plasticity, processability, and certain physicochemical properties, making them suitable for manufacturing various plastic products. Because they do not contain phosphorus, they may offer certain environmental advantages; for example, after use or disposal, they will not cause eutrophication or other environmental problems due to phosphorus release. Common phosphorus-free plastic raw materials include some newer polyolefins, polyesters, and certain biodegradable plastics. To ensure the smooth operation of these plastics, the materials need to undergo a heat-melting and shaping process after being fed into the plastic.

[0003] However, existing furnace equipment lacks uniform heating performance during use, and it is not convenient to clean the plastic adhering to the inner wall, which will affect the next use. Utility Model Content

[0004] The purpose of this invention is to provide a phosphorus-free plastic raw material melting furnace equipment, which makes the plastic more evenly heated during the melting process and facilitates cleaning of the furnace after use.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A phosphorus-free plastic raw material melting furnace device includes a furnace tank fixed on a main support frame with its opening facing upwards, and an electromagnetic induction heating coil is wound around the outside of the furnace tank.

[0007] The bottom of the furnace tank has a furnace discharge pipe that is connected to its interior, and the furnace discharge pipe has a discharge control valve;

[0008] A vertically extending auxiliary support column is provided above the furnace body, and the upper end of the auxiliary support column is fixedly connected to the main support frame;

[0009] A smelting and stirring mechanism is provided above the furnace body. The smelting and stirring mechanism includes a smelting and stirring support ring rotatably connected to an additional support column. The bottom of the smelting and stirring support ring has multiple split stirring receiving holes. A split stirring support column is rotatably connected to the split stirring receiving hole. A vertically extending split stirring rod is fixed at the lower end of the split stirring support column.

[0010] Preferably, the additional support column is provided with a smelting and cleaning mechanism, which includes a smelting and cleaning support ring rotatably connected to the additional support column;

[0011] The smelting cleaning support ring has a vertically penetrating cleaning lifting rod connection hole, and a vertically extending cleaning drive lifting rod is slidably connected in the cleaning lifting rod connection hole;

[0012] A smelting cleaning scraper ring is slidably connected to the inner side wall of the furnace, and the lower end of the cleaning drive lifting rod is fixedly connected to the smelting cleaning scraper ring.

[0013] The top of the smelting cleaning support ring is fixed with an upward-facing cleaning drive fixed cylinder, and a downward-facing cleaning drive sliding cylinder is slidably connected inside the cleaning drive fixed cylinder. The top of the cleaning drive sliding cylinder is fixedly connected to the upper end of the cleaning drive lifting rod.

[0014] The cleaning drive fixed cylinder is equipped with a cleaning drive telescopic rod for driving the cleaning drive sliding cylinder to move up and down.

[0015] Explanation: The scraper, which moves up and down along with the smelting cleaning scraper ring, is used to clean the inner wall of the furnace.

[0016] Preferably, a bottom cleaning arc plate is fixed to the lower side of the smelting cleaning scraper ring, and the lower edge of the bottom cleaning arc plate is consistent with the curvature of the bottom of the furnace body.

[0017] Note: The rotating action of the bottom cleaning arc plate facilitates the cleaning of the bottom of the furnace pot.

[0018] Preferably, the furnace tank has a zigzag-shaped cooling water passage inside its side wall, and the top of the furnace tank has a cooling water inlet pipe and a cooling water outlet pipe, which are respectively connected to the two ends of the cooling water passage.

[0019] Each separate stirring rod has a U-shaped cooling water channel inside. Each separate stirring rod has a stirring rod inlet pipe and a stirring rod outlet pipe at the top, which are connected to the two ends of the stirring rod cooling water channel, respectively.

[0020] Explanation: Cooling the furnace tank with cooling water can easily remove residual phosphate-free plastic adhering to the inner wall of the furnace tank due to the difference in thermal expansion and contraction coefficients between the furnace tank and the phosphate-free plastic during the cooling and contraction process, thus facilitating thorough cleaning.

[0021] Compared with the prior art, the beneficial effects of this utility model are reflected in the following aspects:

[0022] 1. This utility model has a reasonable structural design, is highly efficient and energy-saving, and can heat phosphorus-free plastic raw materials to the required melting temperature in a short time, thereby improving production efficiency and reducing the production time and energy consumption per unit product.

[0023] 2. This utility model is easy to operate. Under the combined rotation of the melting and stirring support ring and the split stirring support column, the split stirring rods in the melting and stirring mechanism can fully stir the phosphorus-free plastic inside the furnace tank, so that the phosphorus-free plastic is heated more evenly during the melting process.

[0024] 3. In the melting and stirring mechanism of this utility model, each of the separate stirring rods is made of metal. Under the electromagnetic induction of the electromagnetic induction heating coil, each of the separate stirring rods can also be heated. Then, the phosphorus-free plastic inside the furnace can be heated through each of the separate stirring rods, so that the phosphorus-free plastic inside the furnace can be heated more evenly during the melting process.

[0025] 4. In this utility model, the smelting cleaning mechanism is used to clean the residual non-phosphate plastic on the inner side wall of the furnace tank, the bottom of the furnace tank is cleaned by the rotation process of the bottom cleaning arc plate, and the inner side wall of the furnace tank is cleaned by the scraper action of the lifting and moving smelting cleaning scraper ring.

[0026] 5. In this utility model, during the cleaning of the furnace tank, cooling water is used to cool the furnace tank. Since there is a difference in the coefficient of thermal expansion and contraction between the furnace tank and the phosphate-free plastic, the residual phosphate-free plastic adhering to the inner wall of the furnace tank can be easily peeled off during the cooling and contraction process, thus facilitating thorough cleaning. Attached Figure Description

[0027] Figure 1 This is the front view of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the furnace tank of this utility model;

[0029] Figure 3 This is a schematic diagram of the smelting and stirring mechanism of this utility model;

[0030] Figure 4 This is a bottom view of the smelting stirring support ring of this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the split stirring rod of this utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the smelting and cleaning support ring of this utility model.

[0033] In the diagram, 10-main support frame, 11-furnace body, 111-furnace discharge pipe, 112-discharge control valve, 12-electromagnetic induction heating coil, 13-auxiliary support column, 14-tank cooling water channel, 141-cooling water inlet pipe, 142-cooling water outlet pipe, 20-melting stirring mechanism, 21-melting stirring support ring, 211-split stirring receiving hole, 212-split stirring support column, 22-split stirring rod, 221-stirring rod cooling water channel, 222-stirring rod inlet pipe, 223-stirring rod outlet pipe, 30-melting cleaning mechanism, 31-melting cleaning support ring, 311-cleaning lifting rod connection hole, 312-cleaning drive fixed cylinder, 313-cleaning drive sliding cylinder, 314-cleaning drive telescopic rod, 32-cleaning drive lifting rod, 33-melting cleaning scraper ring, 34-bottom cleaning arc plate. Detailed Implementation

[0034] The following is combined Figures 1-6 This utility model will be described in detail. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of their respective main views or structural schematic diagrams.

[0035] Example 1:

[0036] A phosphorus-free plastic raw material melting furnace equipment, such as Figure 1 As shown, it includes a furnace tank 11 fixed on the main support frame 10 with the opening facing upward, and an electromagnetic induction heating coil 12 is wound around the outside of the furnace tank 11.

[0037] The furnace tank 11 is a metal tank made of tungsten steel;

[0038] like Figure 1 As shown, the bottom of the furnace tank 11 has a furnace discharge pipe 111 that communicates with its interior, and the furnace discharge pipe 111 has a discharge control valve 112.

[0039] A vertically extending auxiliary support column 13 is provided above the furnace body 11, and the upper end of the auxiliary support column 13 is fixedly connected to the main support frame 10.

[0040] like Figure 1 As shown, a smelting and stirring mechanism 20 is provided above the furnace body 11. The smelting and stirring mechanism 20 includes a smelting and stirring support ring 21 rotatably connected to an auxiliary support column 13. The smelting and stirring support ring 21 is driven by a prior art servo motor fixed to the auxiliary support column 13 through gear transmission to rotate around the vertical axis of the auxiliary support column 13. Figure 3 , Figure 4As shown, the bottom of the smelting stirring support ring 21 has multiple split stirring receiving holes 211, and a split stirring support column 212 is rotatably connected in the split stirring receiving hole 211. A vertically extending split stirring rod 22 is fixed at the lower end of the split stirring support column 212, and the split stirring rod 22 extends downward into the interior of the furnace tank 11.

[0041] Each of the separate stirring support columns 212 is driven by a conventional motor fixed on the melting stirring support ring 21 to rotate around a vertical axis via gear transmission.

[0042] Example 2:

[0043] Based on Example 1, such as Figure 1 As shown, the additional support column 13 is provided with a smelting and cleaning mechanism 30, which includes a smelting and cleaning support ring 31 rotatably connected to the additional support column 13.

[0044] The smelting and cleaning support ring 31 is driven to rotate by a prior art servo motor fixed on the additional support column 13 via gear transmission;

[0045] like Figure 6 As shown, the smelting cleaning support ring 31 has a vertically penetrating cleaning lifting rod connection hole 311, and a vertically extending cleaning drive lifting rod 32 is slidably connected in the cleaning lifting rod connection hole 311.

[0046] like Figure 1 As shown, a smelting cleaning scraper ring 33 is slidably connected to the inner wall of the furnace body 11, and the lower end of the cleaning drive lifting rod 32 is fixedly connected to the smelting cleaning scraper ring 33.

[0047] like Figure 6 As shown, a cleaning drive fixed cylinder 312 with an upward opening is fixed to the top of the smelting cleaning support ring 31, and a cleaning drive sliding cylinder 313 with a downward opening is slidably connected inside the cleaning drive fixed cylinder 312. The top of the cleaning drive sliding cylinder 313 is fixedly connected to the upper end of the cleaning drive lifting rod 32.

[0048] The cleaning drive fixed cylinder 312 is provided with a cleaning drive telescopic rod 314 for driving the cleaning drive sliding cylinder 313 to move up and down. The cleaning drive telescopic rod 314 is an existing electric telescopic rod driven by a servo motor. The outer end of the cleaning drive telescopic rod 314 is fixedly connected to the bottom of the cleaning drive fixed cylinder 312, and the inner end of the cleaning drive telescopic rod 314 is fixedly connected to the top of the cleaning drive sliding cylinder 313.

[0049] Example 3:

[0050] Based on Example 2, such as Figure 1As shown, a bottom cleaning arc plate 34 is fixed on the lower side of the smelting cleaning scraper ring 33, and the lower edge of the bottom cleaning arc plate 34 is consistent with the curvature of the bottom of the furnace body 11.

[0051] Example 4:

[0052] Based on Example 3, such as Figure 2 As shown, the furnace tank 11 has a zigzag-shaped cooling water passage 14 inside its side wall. The top of the furnace tank 11 has a cooling water inlet pipe 141 and a cooling water outlet pipe 142, which are respectively connected to the two ends of the cooling water passage 14.

[0053] like Figure 5 As shown, each split stirring rod 22 has a U-shaped stirring rod cooling water channel 221 inside. Each split stirring rod 22 has a stirring rod inlet pipe 222 and a stirring rod outlet pipe 223 at its upper end. The stirring rod inlet pipe 222 and the stirring rod outlet pipe 223 are respectively connected to the two ends of the stirring rod cooling water channel 221.

[0054] It should be noted that the electromagnetic induction heating coil 12 and the discharge control valve 112 used in this application are both based on existing technology and are not specifically limited here. Those skilled in the art can choose according to their needs, as long as the technical solution of this application can be achieved.

[0055] In practical application, taking phosphorus-free polypropylene as an example, granular phosphorus-free plastic is placed inside the furnace tank 11, and AC power is connected to the electromagnetic induction heating coil 12. Under the action of electromagnetic induction, the furnace tank 11 is heated to 190°C, and the phosphorus-free plastic inside the furnace tank 11 is gradually melted.

[0056] The smelting and stirring mechanism 20 is used to stir the phosphorus-free plastic inside the furnace tank 11 to make it heat more evenly. First, the smelting and stirring support ring 21 is driven by a conventional servo motor fixed on the additional support column 13 through gear transmission to rotate around the vertical axis of the additional support column 13. The smelting and stirring support ring 21 then drives each of the separate stirring support columns 212 to rotate together with the separate stirring rods 22.

[0057] Secondly, each of the separate stirring support columns 212 is driven by a conventional motor fixed on the melting stirring support ring 21 to rotate around the vertical axis through gear transmission, and the separate stirring support columns 212 then drive each of the separate stirring rods 22 to rotate together with it.

[0058] Under the combined rotation of the melting stirring support ring 21 and the split stirring support column 212, the split stirring rods 22 fully stir the phosphorus-free plastic inside the furnace tank 11 using multiple split stirring rods 22.

[0059] Furthermore, each of the separate stirring rods 22 is also made of metal. Under the electromagnetic induction of the electromagnetic induction heating coil 12, each of the separate stirring rods 22 can also be heated. In turn, each of the separate stirring rods 22 heats the phosphorus-free plastic inside the furnace tank 11, making the phosphorus-free plastic inside the furnace tank 11 more evenly heated during the melting process.

[0060] Open the discharge control valve 112, and the molten phosphate-free plastic will be discharged from the furnace discharge pipe 111;

[0061] After the furnace tank 11 is used up, the smelting cleaning mechanism 30 is used to clean the residual phosphorus-free plastic on the inner wall of the furnace tank 11. When the bottom cleaning arc plate 34 is at the bottom of the furnace tank 11, the smelting cleaning support ring 31 is driven to rotate by a servo motor fixed on the additional support column 13 through gear transmission. The smelting cleaning support ring 31 drives the cleaning drive lifting rod 32, the smelting cleaning scraper ring 33 and the bottom cleaning arc plate 34 to rotate around the vertical axis of the additional support column 13. During the rotation, the bottom of the furnace tank 11 is cleaned by the bottom cleaning arc plate 34.

[0062] Subsequently, the inner rod of the cleaning drive telescopic rod 314 extends and retracts, which can drive the cleaning drive sliding cylinder 313, the cleaning drive lifting rod 32, and the smelting cleaning scraper ring 33 to move up and down together, and use the scraping action of the smelting cleaning scraper ring 33 to clean the inner wall of the furnace tank 11.

[0063] Cooling water is introduced into the tank cooling water circuit 14 through the cooling water inlet pipe 141. The cooling water absorbs heat to quickly cool down the furnace tank 11. After heat exchange, the cooling water is discharged from the cooling water outlet pipe 142. Cooling the furnace tank 11 is to facilitate the cleaning of the residual phosphate-free plastic on the inner wall of the furnace tank 11. Since there is a difference in the coefficient of thermal expansion and contraction between the furnace tank 11 and the phosphate-free plastic, the residual phosphate-free plastic adhering to the inner wall of the furnace tank 11 can be easily peeled off during the cooling and contraction process, thus facilitating thorough cleaning.

[0064] Similarly, after the split stirring rod 22 stops rotating, cooling water is introduced into the stirring rod cooling water passage 221 inside the split stirring rod 22 through the stirring rod water inlet pipe 222 to rapidly cool the split stirring rod 22. Since there is a difference in the coefficient of thermal expansion and contraction between the split stirring rod 22 and the phosphate-free plastic, the phosphate-free plastic attached to the split stirring rod 22 is easily peeled off during the cooling and contraction process, which makes it easier to completely clean the phosphate-free plastic attached to the split stirring rod 22.

Claims

1. A phosphorus-free plastic raw material melting furnace equipment, characterized in that, It includes a furnace tank (11) fixed on the main support frame (10) with its opening facing upward, and an electromagnetic induction heating coil (12) is wound around the outside of the furnace tank (11); The bottom of the furnace tank (11) has a furnace discharge pipe (111) that communicates with its interior, and the furnace discharge pipe (111) has a discharge control valve (112). The furnace body (11) is provided with a vertically extending additional support column (13) above it, and the upper end of the additional support column (13) is fixedly connected to the main support frame (10); A smelting and stirring mechanism (20) is provided above the furnace body (11). The smelting and stirring mechanism (20) includes a smelting and stirring support ring (21) rotatably connected to the additional support column (13). The bottom of the smelting and stirring support ring (21) has a plurality of split stirring receiving holes (211). A split stirring support column (212) is rotatably connected in the split stirring receiving hole (211). A vertically extending split stirring rod (22) is fixed at the lower end of the split stirring support column (212).

2. A non-phosphorus plastic raw material melting furnace apparatus according to claim 1, wherein The additional support column (13) is provided with a smelting and cleaning mechanism (30), which includes a smelting and cleaning support ring (31) rotatably connected to the additional support column (13); The smelting cleaning support ring (31) has a vertically penetrating cleaning lifting rod connection hole (311), and a vertically extending cleaning drive lifting rod (32) is slidably connected in the cleaning lifting rod connection hole (311). The inner wall of the furnace tank (11) is slidably connected to a smelting cleaning scraper ring (33), and the lower end of the cleaning drive lifting rod (32) is fixedly connected to the smelting cleaning scraper ring (33). The top of the smelting cleaning support ring (31) is fixed with an upward-facing cleaning drive fixing cylinder (312), and an downward-facing cleaning drive sliding cylinder (313) is slidably connected inside the cleaning drive fixing cylinder (312). The top of the cleaning drive sliding cylinder (313) is fixedly connected to the upper end of the cleaning drive lifting rod (32). The cleaning drive fixed cylinder (312) is provided with a cleaning drive telescopic rod (314) for driving the cleaning drive sliding cylinder (313) to move up and down.

3. A non-phosphorus plastic raw material melting furnace apparatus according to claim 2, characterized by The bottom cleaning arc plate (34) is fixed on the lower side of the smelting cleaning scraper ring (33), and the lower edge of the bottom cleaning arc plate (34) is consistent with the curvature of the bottom of the furnace body (11).

4. The phosphorus-free plastic raw material melting furnace equipment according to claim 1, characterized in that, The furnace tank (11) has a zigzag-shaped cooling water passage (14) inside its side wall. The top of the furnace tank (11) has a cooling water inlet pipe (141) and a cooling water outlet pipe (142). The cooling water inlet pipe (141) and the cooling water outlet pipe (142) are respectively connected to both ends of the cooling water passage (14). Each of the split stirring rods (22) has a U-shaped stirring rod cooling water channel (221) inside. Each of the split stirring rods (22) has a stirring rod inlet pipe (222) and a stirring rod outlet pipe (223) at its upper end. The stirring rod inlet pipe (222) and the stirring rod outlet pipe (223) are respectively connected to the two ends of the stirring rod cooling water channel (221).

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