Auxiliary exhaust structure of conical double-screw extruder

Abstract

The utility model provides an auxiliary exhaust structure of a conical double-screw extruder, which comprises a double-screw extrusion barrel, an exhaust hole is formed in the double-screw extrusion barrel, a mounting frame is arranged at the position where the exhaust hole is formed outside the double-screw extrusion barrel, a mounting barrel and a connecting barrel are sequentially arranged above the mounting frame, a motor is arranged above the connecting barrel, and the motor is connected with the double-screw extrusion barrel. A screw rod is in transmission connection with the lower part of the motor, and one end of the screw rod sequentially penetrates through the connecting cylinder and the mounting cylinder and is arranged in the exhaust hole. According to the utility model, materials discharged from the exhaust hole in the double-screw extrusion cylinder can be extruded into the double-screw extrusion cylinder again through the rotation of the electric screw, so that the waste of the materials is reduced, the technical problem of material overflowing from the exhaust hole is solved, and waste gas generated in the working process of the extruder can flow upwards along gaps in the screws, so that the waste gas is prevented from entering the extrusion cylinder. And the activated carbon is arranged in the filter box, so that the waste gas is finally filtered by the activated carbon and then discharged, and the body health of workers is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of twin-screw extruders, in particular to an auxiliary exhaust structure of a conical twin-screw extruder. Background Art

[0002] The conical twin-screw extruder is developed on the basis of the single-screw extruder. It has good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability, mixing uniformity and other characteristics. The conical twin-screw extruder is equipped with an exhaust device, the purpose of which is to discharge a small amount of low molecular weight substances contained in the material by natural pressure difference (generally called natural exhaust port), or by forced exhaust by vacuuming (generally called vacuum exhaust).

[0003] The exhaust device provided in the existing conical twin-screw extruder has the following disadvantages: during the operation of the extruder, material is easily leaked out from the exhaust hole, thereby causing waste of material. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a conical twin-screw extruder auxiliary exhaust structure, and the technical solution adopted is as follows:

[0005] A conical twin-screw extruder auxiliary exhaust structure comprises a twin-screw extruder barrel, an exhaust hole is arranged on the twin-screw extruder barrel, a mounting frame is arranged at the position where the exhaust hole is arranged outside the twin-screw extruder barrel, a mounting barrel and a connecting barrel are arranged in sequence above the mounting frame, a motor is installed above the connecting barrel, and a screw is transmission-connected to the motor below, one end of the screw passes through the connecting barrel and the mounting barrel in sequence and is placed in the exhaust hole.

[0006] Furthermore, the mounting frame and the mounting tube, as well as the mounting tube and the connecting tube, are connected via connecting flanges.

[0007] Furthermore, a support plate with a filter box installed is provided on one side of the connecting cylinder, the inlet of the filter box is connected to the inside of the connecting cylinder through the exhaust pipe, and the support plate is fixed to the lower end flange of the connecting cylinder by bolts.

[0008] Furthermore, activated carbon for filtering exhaust gas is provided inside the filter box, and a gas exhaust port is provided on one side of the filter box, which can filter the gas exhausted from the extruder to prevent it from affecting the health of the workers.

[0009] Furthermore, the motor adopts a reduction motor, and the motor speed is maintained at 50-60r / min so that the gas in the twin-screw extruder barrel can flow upward along the screw and be discharged.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model can re-extrude the material coming out of the exhaust hole in the twin-screw extruder barrel into the twin-screw extruder barrel through the rotation of the electric screw, thereby reducing the waste of the material and solving the technical problem of material overflowing from the exhaust hole.

[0012] Furthermore, the waste gas generated during the operation of the extruder will flow upward along the gap in the screw through the exhaust hole, and finally be transmitted to the filter box through the exhaust pipe. The inside of the filter box is equipped with activated carbon, so that the waste gas is finally discharged after being filtered by the activated carbon, ensuring the health of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a three-dimensional schematic diagram of the exhaust structure of the utility model;

[0015] Figure 3 It is an internal schematic diagram of the exhaust structure of the utility model.

[0016] In the figure:

[0017] 1-extrusion cylinder, 11-exhaust hole, 2-mounting frame, 3-mounting cylinder, 4-connecting cylinder, 5-motor, 51-screw, 6-exhaust cylinder, 7-support plate, 8-filter box. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0019] As attached Figure 1-3 shown.

[0020] A conical twin-screw extruder auxiliary exhaust structure is provided. A mounting frame 2 is arranged at the position of the exhaust hole 11 in the twin-screw extruder barrel 1. The installation method can be fixed by welding. A mounting barrel 3 and a connecting barrel 4 are sequentially installed above the mounting frame 2. A motor 5 is installed above the connecting barrel 4. A screw 51 is transmission-connected below the motor 5. One end of the screw 51 passes through the connecting barrel 4 and the mounting barrel 3 in sequence and is placed in the exhaust hole 11.

[0021] During the operation of the extruder, the motor 5 is started, and the exhaust gas generated by the extrusion in the twin-screw extruder barrel 1 will flow upward along the gap in the screw 51 through the exhaust hole 11, and finally be transmitted to the filter box 8 through the exhaust pipe 6. The filter box 8 is provided with activated carbon inside, and the exhaust gas is finally discharged after being filtered by the activated carbon.

[0022] In the above process, in order to ensure that the exhaust gas can flow upward along the screw 51, the motor 5 adopts a reduction motor, and the rotation speed is maintained at 50-60r / min.

[0023] The motor 5 drives the screw 51 to rotate so as to squeeze the material coming out of the exhaust hole 11 of the twin-screw extruder barrel 1 back into the twin-screw extruder barrel 1 , thereby reducing the waste of material and solving the technical problem of material overflowing from the exhaust hole 11 .

[0024] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. An auxiliary exhaust structure for a conical twin-screw extruder, comprising a twin-screw extruder barrel (1), a exhaust hole (11) being arranged on the twin-screw extruder barrel (1), characterized in that: A mounting frame (2) is arranged at a position where an exhaust hole (11) is arranged outside the twin-screw extruder barrel (1), and a mounting barrel (3) and a connecting barrel (4) are arranged in sequence above the mounting frame (2). A motor (5) is installed above the connecting barrel (4), and a screw rod (51) is drivingly connected to the motor (5) below. One end of the screw rod (51) passes through the connecting barrel (4) and the mounting barrel (3) in sequence and is placed in the exhaust hole (11).

2. The auxiliary exhaust structure of a conical twin-screw extruder according to claim 1, characterized in that: The mounting frame (2) and the mounting cylinder (3), as well as the mounting cylinder (3) and the connecting cylinder (4), are connected via connecting flanges.

3. The auxiliary exhaust structure of a conical twin-screw extruder according to claim 2, characterized in that: A support plate (7) on which a filter box (8) is mounted is provided on one side of the connecting cylinder (4); the inlet of the filter box (8) is connected to the interior of the connecting cylinder (4) via an exhaust cylinder (6).

4. The auxiliary exhaust structure of a conical twin-screw extruder according to claim 3, characterized in that: The support plate (7) is fixed to the lower end flange of the connecting tube (4) by means of bolts.

5. The auxiliary exhaust structure of a conical twin-screw extruder according to claim 3, characterized in that: Activated carbon for filtering exhaust gas is provided inside the filter box (8), and a gas discharge port is provided on one side of the filter box (8).

6. The auxiliary exhaust structure of a conical twin-screw extruder according to claim 1, characterized in that: The motor (5) is a reduction motor.

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