Screw extruder

Abstract

The utility model provides a screw extruder which comprises a feeding box, an extrusion cylinder communicated with the feeding box and a screw extending from the feeding box to the extrusion cylinder, and a driving motor connected with the screw is arranged outside one end, deviating from the extrusion cylinder, of the feeding box to drive the screw to rotate; an inner fixing cylinder surrounding the spiral is further coaxially and fixedly arranged in the extrusion cylinder, a plurality of first small holes are formed in the inner fixing cylinder, and the bottom of the extrusion cylinder is further fixedly connected with a liquid drainage pipe communicating the interior and the exterior of the extrusion cylinder; the end, deviating from the feeding box, of the extrusion cylinder is further detachably connected with a discharging hole plate, a plurality of second small holes communicating the interior and the exterior of the inner fixing cylinder are formed in the discharging hole plate, and the hole diameter of the first small holes is smaller than that of the second small holes. The discharging orifice plate solves the problem that the discharging orifice plate in the prior art is easy to cut off during discharging.

Description

Technical Field

[0001] The utility model relates to the technical field of extruder equipment, in particular to a screw extruder. Background Art

[0002] During the food processing process, an extruder can be used to process materials that need to be extruded. The extruder generally includes an extrusion barrel, in which a screw is coaxially rotated. The screw is driven to rotate by an external drive motor. A feeding port is provided at one end of the extrusion barrel and a discharge orifice is provided at the other end. The material is fed from the feeding port, and then moves toward the other end with the push of the screw and is gradually extruded. Finally, it is extruded from the hole on the discharge orifice in a cylindrical state and then enters the next process. More specifically, a liquid outlet is generally provided on the extrusion barrel to allow the liquid squeezed out during the extrusion process to be smoothly discharged. In the actual processing process, the material is directly introduced into the extrusion barrel from the feeding port. Generally, the feeding port is set to be small, and the material loaded is also small. As a result, the material entering the extrusion barrel may not be sufficient to move continuously in the extrusion barrel. Therefore, the material in the extrusion barrel may be interrupted (i.e., discontinuous), which ultimately causes the discharge of the discharge orifice to be easily interrupted. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a screw extruder, which solves the problem in the prior art that the discharge of the discharge orifice plate is prone to flow interruption.

[0004] According to an embodiment of the present utility model, a screw extruder includes a feeding box and an extrusion cylinder connected thereto, and a spiral extending from the feeding box to the extrusion cylinder, and a driving motor connected to the spiral is provided on the outside of the feeding box away from the extrusion cylinder to drive the spiral to rotate; an inner fixed cylinder surrounding the spiral is fixedly provided coaxially in the extrusion cylinder, and a plurality of first small holes are provided on the inner fixed cylinder, and a drainage pipe connecting the inside and the outside of the extrusion cylinder is fixedly connected to the bottom of the extrusion cylinder; the end of the extrusion cylinder away from the feeding box is also detachably connected to a discharge orifice plate, and a plurality of second small holes connecting the inside and the outside of the inner fixed cylinder are provided on the discharge orifice plate, and the aperture of the first small hole is smaller than that of the second small hole.

[0005] In the above embodiment, a feeding box connected to the extrusion cylinder is provided in front of the extrusion cylinder, and more materials can be loaded at the same time through the feeding box, ensuring that the material will not be interrupted for a long time during the processing process, so that the discharge orifice plate will not be interrupted, solving the problem of easy interruption of discharge from the discharge orifice plate in the prior art.

[0006] Furthermore, a connecting ring is fixedly connected to the extrusion cylinder, and the discharge orifice plate and the connecting ring are connected by bolts.

[0007] Furthermore, the upper end surface of the feeding box is higher than the extrusion cylinder, and the top surface is provided with a feeding port.

[0008] Furthermore, the cross section of the feeding box is a U-shaped structure.

[0009] Furthermore, a mounting frame is connected to the upper side wall of the extrusion cylinder, and a cover plate is covered on the upper end of the mounting frame.

[0010] Furthermore, the spiral includes a pushing section located in the feeding box and an extrusion section located in the extrusion cylinder, wherein the extrusion section is provided with a plurality of third small holes, and the aperture of the third small holes is smaller than that of the second small holes.

[0011] Furthermore, the lower ends of the feeding box and the extrusion cylinder are respectively fixedly connected to a first support block, and the connection point between the two is also fixedly connected to a second support block.

[0012] Furthermore, the liquid discharge pipe includes a plurality of liquid discharge pipes arranged along the axial direction of the extrusion cylinder.

[0013] Furthermore, a plug is fixedly provided at the center of the discharge orifice plate, the spiral includes a central axis, and the end surface of the central axis away from the drive motor is recessed with a groove for the plug part to rotate into.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By setting a feeding box in front of the extruder, more materials can be loaded at the same time through the feeding box, ensuring that the material will not be interrupted for a long time during the processing process, so that the discharge orifice plate will not be interrupted, solving the problem of easy interruption of the discharge of the discharge orifice plate in the prior art;

[0016] At the same time, an inner fixed cylinder is provided in the extrusion cylinder, and extrusion is realized in the inner fixed cylinder. The liquid generated during the extrusion process can be separated faster, thereby improving the extrusion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 A magnified schematic diagram of the local structure at center A;

[0019] In the above drawings:

[0020] Feed box 1, extrusion cylinder 2, screw 3, drive motor 4, internal fixed cylinder 5, discharge pipe 6, discharge orifice plate 7, feed port 8, center shaft 9, plug 10, pushing section 11, extrusion section 12, connecting ring 13, bolt 14, mounting frame 15, cover plate 16, first support block 17, second support block 18. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0023] In an exemplary embodiment, Figure 1 、 2 As shown, this embodiment provides a screw extruder, which includes a feeding box 1 and an extrusion cylinder 2 connected thereto, and a screw 3 extending from the feeding box 1 to the extrusion cylinder 2. A driving motor 4 connected to the screw 3 is provided on the outside of the feeding box 1 away from the extrusion cylinder 2 to drive the screw 3 to rotate; an inner fixed cylinder 5 surrounding the outside of the screw 3 is also coaxially fixedly provided in the extrusion cylinder 2, and a plurality of first small holes are provided on the inner fixed cylinder 5. A discharge pipe 6 connecting the inside and the outside of the extrusion cylinder 2 is also fixedly connected to the bottom of the extrusion cylinder 2; the end of the extrusion cylinder 2 away from the feeding box 1 is also detachably connected to a discharge orifice plate 7, and a plurality of second small holes connecting the inside and the outside of the inner fixed cylinder 5 are provided on the discharge orifice plate 7, and the aperture of the first small hole is smaller than that of the second small hole.

[0024] The upper end surface of the feeding box 1 is higher than the extrusion cylinder 2 and its cross section is a U-shaped structure. The lower part of the U-shaped structure is provided with a screw 3, and the upper part is provided with a feeding port 8. The feeding port 8 is arranged in a long strip along the extension direction of the screw 3. In this way, more materials can be loaded into the feeding box 1 at the same time through the feeding port 8, ensuring that the material will not be interrupted for a long time during the processing, so that the discharge orifice plate 7 will not be interrupted, which solves the problem of easy interruption of discharge of the discharge orifice plate 7 in the prior art; specifically, when the drive motor 4 is running, the screw 3 rotates to push the material into the inner fixed cylinder 5 in the extrusion cylinder 2, thereby gradually realizing extrusion in the inner fixed cylinder 5. The liquid generated in the process passes through the first small hole to the extrusion cylinder 2, and then is discharged from the discharge pipe 6. The aperture of the first small hole is very small. During the advancement of the screw 3, the material will not enter the first small hole (or only a small amount of material will enter, which will not affect the normal progress of the processing), so that it is smoothly squeezed out from the second small hole.

[0025] like Figure 1 、 2As shown, in a further scheme, the spiral 3 includes a central axis 9 for fixing it, one end of the central axis 9 rotates and extends to the outside of the feeding box 1 and is connected to the drive motor 4, and the other end is close to the discharge orifice plate 7 and is recessed with a groove on the end face, and a pin 10 is also fixedly connected to the discharge orifice plate 7, and the pin 10 can partially rotate and extend into the groove, which is equivalent to the pin 10 providing a rotation support for the end of the central axis 9, so that the central axis 9 can rotate more stably; further, the spiral 3 includes a pushing section 11 located in the feeding box 1 and an extrusion section 12 located in the extrusion cylinder 2, wherein the extrusion section 12 is provided with a plurality of third small holes, the aperture of the third small hole is smaller than the second small hole, and the third small hole is provided in the extrusion section 12, so that the liquid in the material can be separated more efficiently. Similar to the first small hole, the aperture of the third small hole is very small, and the material squeezed during the forward advancement process will move forward, while the liquid will move backward from the third small hole and then separate through the first small hole, or directly separate from the first small hole.

[0026] like Figure 1 、 2 As shown, the discharge orifice plate 7 in this solution is detachable and convenient for replacement and cleaning. Specifically, a connecting ring 13 is fixedly connected to the extrusion cylinder 2, and the discharge orifice plate 7 and the connecting ring 13 are connected by bolts 14; further, a mounting frame 15 is connected to the upper side wall of the extrusion cylinder 2, and the upper end of the mounting frame 15 is covered with a cover plate 16. The mounting frame 15 is connected to the inside of the extrusion cylinder 2. After opening the cover plate 16, the inside of the extrusion cylinder 2 can be flushed, etc.

[0027] like Figure 1 As shown, the lower ends of the feeding box 1 and the extrusion cylinder 2 are respectively fixedly connected with a first support block 17, and the connection point between the two is also fixedly connected with a second support block 18. The feeding box 1 and the extrusion cylinder 2 are lifted off the ground by the first support block 17 and the second support block 18, thereby reserving height space for the setting of the discharge pipe 6. In order to improve the efficiency of liquid discharge, the discharge pipe 6 includes multiple ones arranged along the axial direction of the extrusion cylinder 2, such as three at both ends and in the middle, so that liquid can be discharged from the front, middle and back.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A screw extruder, characterized in that: It includes a feeding box and an extrusion cylinder connected to the feeding box, and a spiral extending from the feeding box to the extrusion cylinder, and a driving motor connected to the spiral is provided on the outside of the feeding box away from the extrusion cylinder to drive the spiral to rotate; an inner fixed cylinder surrounding the outside of the spiral is also coaxially fixedly provided in the extrusion cylinder, and a plurality of first small holes are provided on the inner fixed cylinder, and a drainage pipe connecting the inside and the outside of the extrusion cylinder is also fixedly connected to the bottom of the extrusion cylinder; the end of the extrusion cylinder away from the feeding box is also detachably connected to a discharge orifice plate, and a plurality of second small holes connecting the inside and the outside of the inner fixed cylinder are provided on the discharge orifice plate, and the aperture of the first small hole is smaller than that of the second small hole.

2. The screw extruder according to claim 1, characterized in that The extrusion cylinder is also fixedly connected with a connecting ring, and the discharge orifice plate and the connecting ring are connected by bolts.

3. The screw extruder according to claim 1, characterized in that The upper end surface of the feeding box is higher than the extrusion cylinder, and a feeding port is provided on the top surface.

4. The screw extruder according to claim 3, characterized in that The cross section of the feeding box is a U-shaped structure.

5. The screw extruder according to claim 1, wherein The upper side wall of the extrusion cylinder is also connected to a mounting frame, and the upper end of the mounting frame is covered with a cover plate.

6. The screw extruder according to any one of claims 1 to 5, characterized in that The spiral includes a pushing section located in the feeding box and an extrusion section located in the extrusion cylinder, wherein the extrusion section is provided with a plurality of third small holes, and the aperture of the third small holes is smaller than that of the second small holes.

7. The screw extruder according to claim 6, characterized in that The lower ends of the feeding box and the extrusion cylinder are respectively fixedly connected with a first support block, and the connection point between the two is also fixedly connected with a second support block.

8. The screw extruder according to claim 7, characterized in that The liquid discharge pipes include a plurality of liquid discharge pipes arranged along the axial direction of the extrusion cylinder.

9. The screw extruder according to claim 1, wherein A plug is fixedly provided at the center of the discharge orifice plate. The spiral includes a central axis, and the end surface of the central axis facing away from the drive motor is recessed with a groove for the plug to rotate and press into.

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