Waste gas vacuumizing device of double-screw extruder

Abstract

The utility model belongs to the technical field of double-screw extruders, and relates to a waste gas vacuumizing device of a double-screw extruder. The double-screw extruder comprises a double-screw extruder body, the right side of the double-screw extruder body is fixedly connected with a driving motor, the left end of the double-screw extruder body is fixedly connected with an extrusion die, and the double-screw extruder body is fixedly connected with a vacuumizing mechanism. According to the utility model, a larger pressure difference can be formed between the air exhaust joint and the double-screw extruder body, so that air in the double-screw extruder body can quickly enter the air exhaust joint, and the working efficiency of the vacuumizing device can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of twin-screw extruders and relates to a waste gas vacuum pumping device for a twin-screw extruder. Background Art

[0002] A twin-screw extruder is a device that drives twin screws to extrude raw materials. During processing, the raw materials inside the twin-screw extruder will react to produce gas. The presence of these gases inside the twin-screw extruder will affect the extrusion quality of the product, so a vacuum device is required for exhaust treatment.

[0003] When the existing vacuum device of the twin-screw extruder is in use, since the joint of the vacuum device is connected to the twin-screw extruder, the temperature difference between the connection part of the vacuum device and the twin-screw extruder and the inside of the twin-screw extruder is small, resulting in a small pressure difference between the two, which leads to low vacuum efficiency of the vacuum device. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a waste gas vacuum extraction device for a twin-screw extruder.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A twin-screw extruder waste gas vacuum pumping device, comprising a twin-screw extruder body, a drive motor is fixedly connected to the right side of the twin-screw extruder body, an extrusion die is fixedly connected to the left end of the twin-screw extruder body, and a vacuum pumping mechanism is fixedly connected to the twin-screw extruder body;

[0007] The vacuum mechanism includes a mounting plate fixedly connected to the twin-screw extruder body, a vacuum pump is fixedly connected to the mounting plate, an air outlet of the vacuum pump is fixedly connected to an air outlet pipe, an air inlet of the vacuum pump is fixedly connected to a cross pipe, a tube wall of the cross pipe is fixedly connected to a plurality of air guide hoses, one end of each of the plurality of air guide hoses is fixedly connected to an air extraction joint, the air extraction joint is fixedly connected to the twin-screw extruder body, a water tank is fixedly connected to the twin-screw extruder body, a water inlet pipe and a water outlet pipe are fixedly connected to the water tank, the lower side of the plurality of air extraction joints is fixedly connected to the same heat collecting plate, a plurality of heat sinks are fixedly connected to the side wall on the lower side of the heat collecting plate, the lower end of the heat sink is located in the water tank, and a plurality of heat dissipation fins are fixedly connected to the side wall on the upper side of the heat collecting plate.

[0008] In the above-mentioned twin-screw extruder waste gas vacuum extraction device, the feed port of the twin-screw extruder body is fixedly connected with a feed pipe, the upper end of the feed pipe is fixedly connected with a first tapered tube, the upper end of the first tapered tube is fixedly connected with a second tapered tube, the first tapered tube and the second tapered tube are symmetrically arranged, and a plurality of pressure relief valves are fixedly connected between the first tapered tube and the second tapered tube.

[0009] In the above-mentioned twin-screw extruder waste gas vacuum extraction device, a heating ring is provided on the outer fixed sleeve of the feed pipe, and a controller is fixedly connected to the heating ring.

[0010] In the above-mentioned twin-screw extruder waste gas vacuum extraction device, the vertical side walls of the plurality of exhaust joints are fixedly connected with brackets, and the brackets are located below the air guide hose and the cross pipe.

[0011] In the above-mentioned twin-screw extruder waste gas vacuum extraction device, a metal rod is fixedly connected between two adjacent exhaust joints, a through hole is opened on the heat dissipation fin, and the metal rod passes through the heat dissipation fin through the through hole.

[0012] In the above-mentioned twin-screw extruder exhaust gas vacuum extraction device, a plurality of heat dissipation holes are evenly opened on the mounting plate, and the heat dissipation holes are located below the driving motor.

[0013] In the above-mentioned twin-screw extruder exhaust gas vacuum extraction device, the vertical side walls of the plurality of heat sinks are each provided with a plurality of guide holes.

[0014] In the above-mentioned twin-screw extruder waste gas vacuum extraction device, the bracket includes a support plate fixedly connected to the exhaust joint, and an anti-wear gasket is fixedly connected to the upper side of the support plate.

[0015] In the above-mentioned twin-screw extruder waste gas vacuum extraction device, a baffle is fixedly connected to the side wall on the upper side of the water tank, and the baffle is located above the water inlet pipe.

[0016] In the above-mentioned twin-screw extruder exhaust gas vacuum extraction device, the heat collecting plate, heat sink, heat dissipating fins and metal rod are all made of aluminum.

[0017] Compared with the existing technology, the advantages of the utility model are:

[0018] 1. The utility model is provided with a vacuum pump mechanism. When in use, the vacuum pump is operated to vacuum the interior of the twin-screw extruder body, and cooling water is injected into the water tank through the water inlet pipe. The cooling water can absorb the heat from the plurality of heat sinks, thereby reducing the temperature of the heat sinks. The heat collecting plate can absorb the heat from the air extraction joint. The plurality of heat sinks can assist in the heat dissipation of the heat collecting plate, thereby improving the heat dissipation efficiency of the air extraction joint and reducing the temperature of the air extraction joint. Thus, a larger pressure difference can be created between the air extraction joint and the twin-screw extruder body, so that the gas inside the twin-screw extruder body can quickly enter the air extraction joint, thereby improving the working efficiency of the vacuum pumping device.

[0019] 2. The utility model is provided with a relief valve. When feeding, the raw materials enter through the second conical tube. When the raw materials enter, the gas in the feeding tube can be discharged through the pressure relief valve, thereby improving the smoothness of feeding.

[0020] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 It is a side view of the utility model.

[0023] Figure 3 It is a top view of the utility model.

[0024] Figure 4 yes Figure 1 Schematic diagram of the structure of the vacuum extraction mechanism.

[0025] Figure 5 yes Figure 1 Schematic diagram of the structure of the feed pipe.

[0026] In the figure: 1. Twin-screw extruder body; 2. Drive motor; 3. Extrusion die; 4. Mounting plate; 5. Vacuum pump; 6. Exhaust pipe; 7. Horizontal pipe; 8. Air guide hose; 9. Exhaust joint; 10. Water tank; 11. Water inlet pipe; 12. Water outlet pipe; 13. Heat collecting plate; 14. Heat sink; 15. Heat sink fin; 16. Feed pipe; 17. First conical tube; 18. Second conical tube; 19. Pressure relief valve; 20. Heating ring; 21. Controller; 22. Bracket; 23. Metal rod; 24. Heat dissipation hole; 25. Diversion hole; 26. Support plate; 27. Anti-wear pad; 28. Baffle. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings.

[0028] like Figure 1-5 As shown, a twin-screw extruder exhaust gas vacuum pumping device comprises a twin-screw extruder body 1, a drive motor 2 is fixedly connected to the right side of the twin-screw extruder body 1, an extrusion die 3 is fixedly connected to the left end of the twin-screw extruder body 1, and a vacuum pumping mechanism is fixedly connected to the twin-screw extruder body 1;

[0029] The vacuum mechanism includes a mounting plate 4 fixedly connected to the twin-screw extruder body 1, a vacuum pump 5 fixedly connected to the mounting plate 4, an air outlet of the vacuum pump 5 fixedly connected to an air outlet pipe 6, an air inlet of the vacuum pump 5 fixedly connected to a transverse pipe 7, a tube wall of the transverse pipe 7 fixedly connected to a plurality of air guide hoses 8, one end of each of the plurality of air guide hoses 8 fixedly connected to an air extraction joint 9, the air extraction joint 9 fixedly connected to the twin-screw extruder body 1, a water tank 10 fixedly connected to the twin-screw extruder body 1, a water inlet pipe 11 and a water outlet pipe 12 fixedly connected to the water tank 10, a same heat collecting plate 13 fixedly connected to the lower side of the plurality of air extraction joints 9, a plurality of heat sinks 14 fixedly connected to the side wall on the lower side of the heat collecting plate 13, the lower end of the heat sink 14 is located in the water tank 10, and a plurality of heat dissipation fins 15 are fixedly connected to the side wall on the upper side of the heat collecting plate 13.

[0030] In this embodiment, when in use, the vacuum pump 5 is operated to vacuum the interior of the twin-screw extruder body 1, and cooling water is injected into the water tank 10 through the water inlet pipe 11. The cooling water can absorb the heat from the multiple heat sinks 14, thereby reducing the temperature of the heat sink 14, and the heat collecting plate 13 can absorb the heat from the air extraction joint 9. The multiple heat sinks 14 can assist in heat dissipation for the heat collecting plate 13, thereby improving the heat dissipation efficiency of the air extraction joint 9 and reducing the temperature of the air extraction joint 9, so that a larger pressure difference can be created between the air extraction joint 9 and the twin-screw extruder body 1, so that the gas inside the twin-screw extruder body 1 can quickly enter the air extraction joint 9, thereby improving the working efficiency of the vacuum device.

[0031] The feed port of the twin-screw extruder body 1 is fixedly connected to a feed pipe 16, the upper end of the feed pipe 16 is fixedly connected to a first tapered tube 17, the upper end of the first tapered tube 17 is fixedly connected to a second tapered tube 18, the first tapered tube 17 and the second tapered tube 18 are symmetrically arranged, and a plurality of pressure relief valves 19 are fixedly connected between the first tapered tube 17 and the second tapered tube 18.

[0032] In this embodiment, when feeding, the raw material enters through the second tapered tube 18. When the raw material enters, the gas in the feed pipe 16 can be discharged through the pressure relief valve 19, thereby improving the smoothness of the feeding.

[0033] A heating ring 20 is fixedly sleeved outside the feed pipe 16 , and a controller 21 is fixedly connected to the heating ring 20 . The heating ring 20 can heat the feed pipe 16 , thereby ensuring the temperature of the raw materials.

[0034] The vertical side walls of the plurality of air extraction joints 9 are all fixedly connected with a bracket 22 , and the bracket 22 is located below the air guide hose 8 and the cross pipe 7 .

[0035] In the above embodiment, the bracket 22 is provided to support the air guide hose 8 and the cross pipe 7 .

[0036] A metal rod 23 is fixedly connected between two adjacent exhaust joints 9 , a through hole is provided on the heat dissipation fin 15 , and the metal rod 23 passes through the heat dissipation fin 15 through the through hole.

[0037] In this embodiment, the provided metal rod 23 can guide the heat on the air extraction joint 9 to the heat dissipation fins 15 , thereby improving the heat dissipation efficiency of the air extraction joint 9 .

[0038] The mounting plate 4 is evenly provided with a plurality of heat dissipation holes 24 , and the heat dissipation holes 24 are located below the driving motor 2 .

[0039] In the above embodiment, the heat dissipation holes 24 are provided to prevent the mounting plate 4 from hindering the heat dissipation of the drive motor 2 .

[0040] A plurality of guide holes 25 are formed on the vertical side walls of the plurality of heat sinks 14 .

[0041] In the above embodiment, the provided guide holes 25 can improve the contact effect between the heat sink 14 and the cooling water, thereby improving the heat dissipation efficiency.

[0042] The bracket 22 includes a support plate 26 fixedly connected to the air extraction joint 9 , and an anti-wear pad 27 is fixedly connected to the upper side of the support plate 26 .

[0043] In the above embodiment, the anti-wear pad 27 can prevent wear caused by friction between the air guide hose 8 and the bracket 22 .

[0044] A baffle 28 is fixedly connected to the side wall of the upper side of the water tank 10 , and the baffle 28 is located above the water inlet pipe 11 .

[0045] In this embodiment, the baffle 28 is provided to prevent water from splashing out when water enters the water inlet pipe 11 .

[0046] The heat collecting plate 13 , the heat sink 14 , the heat sink fins 15 and the metal rod 23 are all made of aluminum.

[0047] In the above embodiment, aluminum has good thermal conductivity, so it can improve the use effect of the heat collecting plate 13 , the heat sink 14 , the heat sink fins 15 and the metal rod 23 .

[0048] The working principle of the utility model is:

[0049] When in use, the vacuum pump 5 is operated to vacuum the interior of the twin-screw extruder body 1, and cooling water is injected into the water tank 10 through the water inlet pipe 11. The cooling water can absorb the heat from the multiple heat sinks 14, thereby reducing the temperature of the heat sink 14, and the heat collecting plate 13 can absorb the heat from the air extraction joint 9. The multiple heat sinks 14 can assist in the heat dissipation of the heat collecting plate 13, thereby improving the heat dissipation efficiency of the air extraction joint 9 and reducing the temperature of the air extraction joint 9, so that a larger pressure difference can be created between the air extraction joint 9 and the twin-screw extruder body 1, so that the gas inside the twin-screw extruder body 1 can quickly enter the air extraction joint 9, thereby improving the working efficiency of the vacuum device.

[0050] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

[0051] Although this article uses more terms such as 1. twin-screw extruder body; 2. drive motor; 3. extrusion die; 4. mounting plate; 5. vacuum pump; 6. air outlet pipe; 7. transverse pipe; 8. air guide hose; 9. air extraction joint; 10. water tank; 11. water inlet pipe; 12. water outlet pipe; 13. heat collecting plate; 14. heat sink; 15. heat sink fin; 16. feed pipe; 17. first conical tube; 18. second conical tube; 19. pressure relief valve; 20. heating ring; 21. controller; 22. bracket; 23. metal rod; 24. heat dissipation hole; 25. flow guide hole; 26. support plate; 27. anti-wear pad; 28. baffle, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model. It is contrary to the spirit of the utility model to interpret them as any additional restrictions.

Claims

1. A twin-screw extruder exhaust gas vacuum extraction device, comprising a twin-screw extruder body (1), characterized in that: The right side of the twin-screw extruder body (1) is fixedly connected to a driving motor (2), the left end of the twin-screw extruder body (1) is fixedly connected to an extrusion die (3), and the twin-screw extruder body (1) is fixedly connected to a vacuum pumping mechanism; The vacuum pumping mechanism comprises a mounting plate (4) fixedly connected to the twin-screw extruder body (1), a vacuum pump (5) fixedly connected to the mounting plate (4), an air outlet of the vacuum pump (5) fixedly connected to an air outlet pipe (6), an air inlet of the vacuum pump (5) fixedly connected to a transverse pipe (7), a tube wall of the transverse pipe (7) fixedly connected to a plurality of air guide hoses (8), one end of each of the plurality of air guide hoses (8) fixedly connected to an air extraction connector (9), and the air extraction connector (9) fixedly connected to the twin-screw extruder body (1). On the twin-screw extruder body (1), a water tank (10) is fixedly connected to the twin-screw extruder body (1), a water inlet pipe (11) and a water outlet pipe (12) are fixedly connected to the water tank (10), the lower sides of the plurality of exhaust joints (9) are fixedly connected to the same heat collecting plate (13), the side wall on the lower side of the heat collecting plate (13) is fixedly connected to a plurality of heat sinks (14), the lower end of the heat sink (14) is located in the water tank (10), and the side wall on the upper side of the heat collecting plate (13) is fixedly connected to a plurality of heat dissipation fins (15).

2. The exhaust gas vacuum pumping device for a twin-screw extruder according to claim 1, characterized in that: The feed port of the twin-screw extruder body (1) is fixedly connected to a feed pipe (16), the upper end of the feed pipe (16) is fixedly connected to a first conical tube (17), the upper end of the first conical tube (17) is fixedly connected to a second conical tube (18), the first conical tube (17) and the second conical tube (18) are symmetrically arranged, and a plurality of pressure relief valves (19) are fixedly connected between the first conical tube (17) and the second conical tube (18).

3. The exhaust gas vacuum pumping device for a twin-screw extruder according to claim 2, characterized in that: A heating ring (20) is fixedly sleeved outside the feed pipe (16), and a controller (21) is fixedly connected to the heating ring (20).

4. The exhaust gas vacuum pumping device for a twin-screw extruder according to claim 3, characterized in that: The vertical side walls of the plurality of air extraction joints (9) are all fixedly connected with a bracket (22), and the bracket (22) is located below the air guide hose (8) and the cross pipe (7).

5. The exhaust gas vacuum extraction device for a twin-screw extruder according to claim 4, characterized in that: A metal rod (23) is fixedly connected between two adjacent air extraction joints (9), a through hole is provided on the heat dissipation fin (15), and the metal rod (23) passes through the heat dissipation fin (15) through the through hole.

6. The exhaust gas vacuum extraction device for a twin-screw extruder according to claim 5, characterized in that: A plurality of heat dissipation holes (24) are evenly arranged on the mounting plate (4), and the heat dissipation holes (24) are located below the drive motor (2).

7. The exhaust gas vacuum extraction device for a twin-screw extruder according to claim 6, characterized in that: The vertical side walls of the plurality of heat sinks (14) are each provided with a plurality of guide holes (25).

8. The exhaust gas vacuum extraction device for a twin-screw extruder according to claim 7, characterized in that: The bracket (22) comprises a support plate (26) fixedly connected to the air extraction joint (9), and an anti-wear pad (27) is fixedly connected to the upper side of the support plate (26).

9. The exhaust gas vacuum extraction device for a twin-screw extruder according to claim 8, characterized in that: A baffle (28) is fixedly connected to the side wall on the upper side of the water tank (10), and the baffle (28) is located above the water inlet pipe (11).

10. The exhaust gas vacuum extraction device for a twin-screw extruder according to claim 9, characterized in that: The heat collecting plate (13), the heat sink (14), the heat dissipating fins (15) and the metal rod (23) are all made of aluminum.

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