Exhaust device for exhaust port of double-screw extruder

Abstract

The utility model provides an exhaust device for an exhaust port of a double-screw extruder. The exhaust device comprises a base, the main pipeline comprises a first vertical section and a second vertical section, a bent section is communicated between the first vertical section and the second vertical section, the inner diameter of the first vertical section is smaller than the inner diameter of the second vertical section, a screen is arranged at the top of the second vertical section, and the first vertical section is communicated with the second vertical section. The outer wall of the bent section is communicated with a first vertical pipe and a second vertical pipe. The device has the effects of being not easy to block and convenient to clean.

Description

Technical Field

[0001] The utility model relates to plastic extrusion processing equipment, in particular to an exhaust device for an exhaust port of a twin-screw extruder. Background Art

[0002] Twin-screw extruders are mainly used in plastic extrusion processing. During the processing, volatiles in the extrudate and gas in the mixing gap need to be discharged, and an exhaust port is usually provided at the front end. When using a twin-screw extruder for granulation, part of the material will often be sprayed out at the exhaust port due to excessive gas, and the sprayed material will adhere to the surface of the equipment and cause pollution. At present, a screen is usually added to the exhaust port, but after long-term use, the screen is easily blocked by the material, and the gas cannot be discharged normally, requiring frequent disassembly and cleaning. Failure to clean in time will also affect the quality of the extrudate. In response to this problem, the utility model proposes an exhaust device for a twin-screw extruder exhaust port that is not easy to clog and is easy to clean. Utility Model Content

[0003] The utility model provides an exhaust device for an exhaust port of a twin-screw extruder, which can effectively solve the above problems.

[0004] The utility model is achieved in this way:

[0005] A twin-screw extruder exhaust port exhaust device, comprising:

[0006] Base;

[0007] The main pipeline comprises a first vertical section and a second vertical section, a bending section is connected between the first vertical section and the second vertical section, the inner diameter of the first vertical section is smaller than the inner diameter of the second vertical section, a screen is provided on the top of the second vertical section, and the first vertical pipe and the second vertical pipe are connected on the outer wall of the bending section.

[0008] As a further improvement, the axis of the second vertical pipe is colinear with the axis of the second vertical section, the connection position of the second vertical pipe and the bending section is higher than the connection position of the first vertical pipe and the bending section, and the inner diameter of the second vertical pipe is larger than the inner diameter of the first vertical pipe.

[0009] As a further improvement, it also includes a receiving tray, and the receiving tray is adsorbed on the top of the base through a magnet.

[0010] As a further improvement, the inner diameter of the bending section gradually increases from one end close to the first vertical section to be consistent with the inner diameter of the second vertical section, and the axis of the bending section includes two deflections in opposite directions.

[0011] As a further improvement, the whole is made of 304 stainless steel.

[0012] The beneficial effects of the utility model are: it is not easy to be blocked and is easy to clean. The material will not adhere to the inner wall of the pipe. The material falls out along the vertical pipe and is caught by the receiving plate for easy cleaning. According to the design of the pipeline structure, the gas flow rate gradually decreases and the sprayed material is not easy to be sprayed onto the screen to cause blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the utility model.

[0015] Figure 2 It is a cross-sectional view of the symmetry surface provided by the embodiment of the utility model.

[0016] Figure 3 It is a schematic diagram of the gas flow direction provided by an embodiment of the utility model.

[0017] Reference numerals:

[0018] 1. Main pipeline; 11. First vertical section; 12. Bend section; 13. Second vertical section; 14. First vertical pipe; 15. Second vertical pipe;

[0019] 2. Screen;

[0020] 3. Serve on a plate;

[0021] 4. Base. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0023] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] Reference Figures 1 to 3 As shown, a twin-screw extruder exhaust port exhaust device comprises:

[0025] The main pipeline 1 comprises a first vertical section 11 and a second vertical section 13. The first vertical section 11 and the second vertical section 13 are spaced apart in the vertical direction and their axes are not in the same straight line. The two are connected via a bending section 12. The inner diameter of the first vertical section 11 is smaller than the inner diameter of the second vertical section 13. The bending section 12 is provided with a first vertical pipe 14 and a second vertical pipe 15 on the side near the bottom. Both the first vertical pipe 14 and the second vertical pipe 15 are connected to the bending section 12. The inner diameter of the bending section 12 gradually increases from one end near the first vertical section 11 to be consistent with the inner diameter of the second vertical section 13 (according to Bernoulli's principle, the gas flow rate gradually decreases). The axis of the bending section 12 comprises two deflections in opposite directions. Too many reverse bending deflections are not conducive to gas flow and the structure is more complicated.

[0026] A base 4 for connecting to the twin-screw extruder is provided at the bottom of the main pipeline 1, and a screen 2 is provided at the top of the second vertical section 13. The utility model also includes a receiving tray 3, which is adsorbed on the top of the base 4 by a magnet, and is positioned just enough to receive the materials falling out of the first vertical tube 14 and the second vertical tube 15.

[0027] The axis of the second vertical pipe 15 is colinear with the axis of the second vertical section 13 , the connection position of the second vertical pipe 15 and the bending section 12 is higher than the connection position of the first vertical pipe 14 and the bending section 12 , and the inner diameter of the second vertical pipe 15 is larger than the inner diameter of the first vertical pipe 14 ; the utility model is made of 304 stainless steel as a whole.

[0028] It should be noted that the first vertical section 11 and the second vertical section 13 are staggered to prevent the material from falling back into the twin-screw extruder after being ejected. If the main pipeline 1 is designed as a single vertical tube, the material will be adsorbed on the tube wall or the screen 2 after being ejected. After a period of time, if the material deteriorates and falls off the side wall, it will fall into the twin-screw extruder and mix with the new material, which will affect the quality of the new material. In the utility model, two first vertical tubes 14 and second vertical tubes 15 of different sizes are provided, and part of the material can fall out of the first vertical tube 14. When the material passes through the second vertical pipe 15, it will slow down again, and the gas discharged from the twin-screw extruder is a discontinuous airflow, and the second vertical pipe 15 is coaxial with the second vertical section 13. Even when the material is blown into the last second vertical section 13 or blown below the screen 2, and then falls down and falls out of the second vertical pipe 15, since the utility model is made of 304 stainless steel as a whole, its thermal conductivity is relatively low, the temperature during use is lower than the internal temperature of the twin-screw extruder, and the surface of the material is smooth, and the material will not adhere to the inner wall of the tube after being sprayed out.

[0029] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A twin-screw extruder exhaust port exhaust device, characterized in that: Include: Base (4); A main pipeline (1), the main pipeline (1) comprising a first vertical section (11) and a second vertical section (13), a bent section (12) being connected between the first vertical section (11) and the second vertical section (13), the inner diameter of the first vertical section (11) being smaller than the inner diameter of the second vertical section (13), a screen (2) being provided at the top of the second vertical section (13), and a first vertical pipe (14) and a second vertical pipe (15) being connected on the outer wall of the bent section (12).

2. A twin-screw extruder exhaust port exhaust device according to claim 1, characterized in that: The axis of the second vertical pipe (15) is colinear with the axis of the second vertical section (13); the connection position of the second vertical pipe (15) and the bending section (12) is higher than the connection position of the first vertical pipe (14) and the bending section (12); and the inner diameter of the second vertical pipe (15) is greater than the inner diameter of the first vertical pipe (14).

3. A twin-screw extruder exhaust port exhaust device according to claim 1, characterized in that: It also comprises a receiving tray (3), wherein the receiving tray (3) is adsorbed on the top of the base (4) via a magnet.

4. A twin-screw extruder exhaust port exhaust device according to claim 1, characterized in that: The inner diameter of the bending section (12) gradually increases from one end close to the first vertical section (11) to the same as the inner diameter of the second vertical section (13), and the axis of the bending section (12) includes two deflections in opposite directions.

5. The exhaust device for the exhaust port of a twin-screw extruder according to claim 1, characterized in that: The whole body is made of 304 stainless steel.

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