Supporting structure and extruder

Abstract

The utility model discloses a supporting structure and an extruder, and relates to the technical field of automation equipment, the supporting structure comprises an outer pipe, an inner pipe, a supporting part and a gasket, the outer pipe is provided with two oppositely arranged mounting holes; an inner pipe is arranged in each mounting hole; the outer wall of the outer pipe is provided with a supporting part which protrudes upwards along the diameter of the inner pipe; the two ends of each inner pipe are each provided with a gasket, one end of each gasket is connected with the corresponding inner pipe, and the other end of each gasket protrudes in the axial direction of the corresponding inner pipe. According to the technical scheme, the inner pipe is sleeved with the outer pipe, and meanwhile the gaskets are arranged on the two sides of the inner pipe respectively. Wherein the inner pipe mainly plays a guiding role to adjust the eccentricity of the screw shafts, and the two screw shafts are in parallel kneading type transmission. A supporting part is further arranged on the outer pipe and used for being connected with an external structure in an abutting mode to achieve the supporting and overflowing effects. And the gasket is used for increasing the axial length of the outer pipe and the inner pipe, reducing the movement of the inner pipe and improving the axial positioning precision of the screw shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of automation equipment, in particular to a supporting structure and an extruder. Background Art

[0002] Extruders are suitable for processing food, ceramics, plastics and other products. In the current market, twin-screw extruders are usually used. However, in the current twin-screw extruders of the prior art, some equipment have no support mechanism in the middle or end of the screw shaft, which can easily cause problems such as insufficient rigidity and eccentricity of the screw shaft in longer screw devices, accelerate equipment wear during long-term operation, and generate vibration and noise. Although some equipment is equipped with a support mechanism, it only relies on the annular support mechanism to fix the screw rod to achieve axial positioning of the support device, which can easily cause axial movement of the support device and inaccurate positioning accuracy. Utility Model Content

[0003] The main purpose of the utility model is to provide a support structure and an extruder, aiming to solve the technical problems in the prior art that the axial positioning of the support device is achieved by fixing the screw rod only by an annular support mechanism, which is prone to axial movement of the support device and inaccurate positioning accuracy.

[0004] In order to achieve the above object, the utility model provides a support structure, which includes:

[0005] An outer tube, wherein the outer tube has two mounting holes arranged opposite to each other;

[0006] An inner tube, each of the mounting holes is provided with one inner tube;

[0007] A support portion, wherein the outer wall of the outer tube has a support portion protruding in the radial direction of the inner tube;

[0008] A gasket is provided at both ends of each inner tube, one end of the gasket is connected to the inner tube, and the other end protrudes along the axial direction of the inner tube.

[0009] Optionally, an abutment portion is formed on a side of the gasket facing away from the inner tube along the axial protrusion of the inner tube, and the abutment portion and the connecting portion are arranged in a stepped shape.

[0010] Optionally, the diameter of the gasket is greater than or equal to the diameter of the inner tube, and the diameter of the abutment portion is smaller than the diameter of the gasket.

[0011] Optionally, the inner wall of the inner tube is provided with saw teeth, and the saw teeth are in the shape of involute splines.

[0012] Optionally, the outer tube includes two tube sleeves and a connecting piece, the connecting piece is arranged between the two tube sleeves, the tube sleeves are provided with the mounting holes, each of the mounting holes is correspondingly provided with an inner tube, and the tube sleeves and the inner tube are arranged in concentric circles.

[0013] Optionally, the two pipe sleeves are integrally formed with the connecting piece.

[0014] Optionally, three supporting parts are provided on each of the pipe sleeves, wherein the connecting piece and the three supporting parts are evenly spaced apart on the outer wall of the corresponding pipe sleeve, and the surface of the supporting part facing away from the pipe sleeve is a curved surface.

[0015] Optionally, a gap is formed between two adjacent support portions.

[0016] Optionally, the outer tube is made of cobalt-based alloy.

[0017] In addition, in order to solve the above problems, the utility model also proposes an extruder, and the extruder is applied with the support structure as mentioned above.

[0018] The technical solution of the utility model is to sleeve the outer tube on the inner tube, and at the same time, gaskets are respectively arranged on both sides of the inner tube. Among them, the inner tube mainly plays a guiding role to adjust the eccentricity of the screw shaft, and the two screw shafts are kneaded in parallel. A support part is also provided on the outer tube, and the support part is used to abut against the external structure to play a supporting and flow-through role. The gasket is used to increase the axial length of the outer tube and the inner tube, reduce the movement of the inner tube, and improve the axial positioning accuracy of the screw shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A structural schematic diagram of a first embodiment of a support structure provided by the utility model;

[0021] Figure 2 A structural schematic diagram of a second embodiment of the support structure provided by the utility model;

[0022] Figure 3 A top view of a third embodiment of the support structure provided by the utility model;

[0023] Figure 4 A side view of the third embodiment of the support structure provided by the utility model

[0024] Figure 5 A structural schematic diagram of another embodiment of the support structure provided by the utility model;

[0025] Figure 6 The utility model is a schematic structural diagram of the extruder provided by the utility model.

[0026] Description of Figure Numbers:

[0027] 1. Outer tube; 11. Tube sleeve; 12. Connector; 13. Mounting hole; 2. Inner tube; 21. Sawtooth; 22. Through hole; 3. Gasket; 4. Abutment portion; 5. Support portion; 51. Gap; 6. Screw shaft; 7. Outer tube.

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0032] The utility model provides a supporting structure.

[0033] See also Figure 1 In one embodiment of the utility model, the support structure includes an outer tube 1, an inner tube 2, a support portion 5 and a gasket 3, the outer tube 1 has two oppositely arranged mounting holes 13; each mounting hole 13 is provided with an inner tube 2; the outer wall of the outer tube 1 has a support portion 5 protruding in the radial direction of the inner tube 2; each of the two ends of each inner tube 2 is provided with a gasket 3, one end of the gasket 3 is connected to the inner tube 2, and the other end protrudes along the axial direction of the inner tube 2.

[0034] The mounting hole 13 is located at the center of the outer tube 1, and the shape of the mounting hole 13 matches the shape of the inner tube 2. In this embodiment, the outer tube 1 and the inner tube 2 are both circular, and the outer tube 1 and the inner tube 2 can also be adapted to other shapes.

[0035] The outer tube 1 and the inner tube 2 may be connected by interference fit to improve the connection strength therebetween.

[0036] The length of the inner tube 2 is slightly greater than that of the outer tube 1. When the inner tube 2 is installed in the outer tube 1, the two sides of the inner tube 2 protrude from the two ends of the outer tube 1. The gaskets 3 are installed at the two ends of the inner tube 2 protruding from the outer tube 1, and one gasket 3 is installed at each end.

[0037] There is a through hole 22 in the center of the inner tube 2. Figure 2 , the inner tube 2 is inserted along the axial direction of the extruder screw shaft 6, so that the extruder screw shaft 6 is inserted into the through hole 22. The gasket 3 is used to increase the overall axial length of the support structure, so that the accuracy of axial positioning of the screw shaft 6 can be improved during use.

[0038] One or more support parts 5 may be provided on the outer wall of the outer tube 1. Please continue to refer to Figure 2 The outer tube 1 is located between the extruder screw shaft 6 and the extruder outer barrel 7. After being installed in place, the support part 5 protrudes and abuts against the inner wall of the extruder outer barrel 7, which plays a role in secondary positioning of the outer tube 1 and improves the installation stability of the outer tube 1 and the inner tube 2.

[0039] In one embodiment, multiple support structures can be arranged on the extruder screw shaft 6 according to actual working conditions, and the multiple support structures are arranged in sequence along the axial direction of the screw shaft 6. For example, they are placed at the stress concentration point of the extruder screw shaft 6, the middle part and / or both ends of the extruder screw shaft 6, etc., which have flexibility, versatility and interchangeability, play the role of supporting the screw shaft 6 and improving the rigidity of the screw shaft 6. At the same time, the flexural deformation of the screw shaft 6 can also be effectively avoided.

[0040] The technical solution of the utility model is to sleeve the outer tube 1 on the inner tube 2, and at the same time, gaskets 3 are respectively arranged on both sides of the inner tube 2. Among them, the inner tube 2 mainly plays a guiding role to adjust the eccentricity of the screw shaft 6, and the two screw shafts 6 are kneaded in parallel. A support part 5 is also provided on the outer tube 1, and the support part 5 is used to abut against the external structure to play a supporting and flow-through role. The gasket 3 is used to increase the axial length of the outer tube 1 and the inner tube 2, reduce the movement of the inner tube 2, and improve the axial positioning accuracy of the screw shaft 6.

[0041] In one embodiment, the side of the gasket 3 facing away from the inner tube 2 is formed with an abutment portion 4 along the axial protrusion of the inner tube 2, and the abutment portion 4 and the connecting portion are arranged in a stepped manner. That is, the diameter of the gasket 3 is greater than or equal to the diameter of the inner tube 2, and the diameter of the abutment portion 4 is smaller than the diameter of the gasket 3.

[0042] Please refer to Figure 3 and Figure 4 The abutment part 4 and the gasket 3 are in a stepped structure. The abutment part 4 is protruded outward from the end surface of the gasket 3. The axial positioning of the extruder screw rod mainly depends on the gasket 3 and the abutment part 4 on both sides. The abutment part 4 can ensure that it fits with other threaded elements, which plays a role in reducing the contact area of ​​the end surface.

[0043] The abutment portion 4 can be polished to reduce the surface roughness of the abutment portion 4 and reduce friction. The gasket 3 and the inner tube 2 are detachably connected. In the later long-term use, the gasket 3 can be replaced as a wearing part to increase the service life of the support structure.

[0044] In one embodiment, the outer tube 1 includes two tube sleeves 11 and a connecting piece 12, wherein the connecting piece 12 is disposed between the two tube sleeves 11, wherein the tube sleeves 11 are provided with mounting holes 13, wherein each mounting hole 13 is correspondingly provided with an inner tube 2, and the tube sleeves 11 and the inner tube 2 are arranged in concentric circles.

[0045] The support structure of this embodiment can be applied not only to an extruder with a single screw shaft 6 , but also can be applied to an extruder with a twin screw shaft 6 by adopting two pipe sleeves 11 .

[0046] The two pipe sleeves 11 are connected by a connecting piece 12. Figure 5 Under the action of the connecting member 12, the two pipe sleeves 11 are kept relatively fixed. The circles of the two pipe sleeves 11 are located on the same straight line, and an inner pipe 2 can be installed in each pipe sleeve 11, and the centers of the two inner pipes 2 are also located on the same straight line.

[0047] The two pipe sleeves 11 and the connecting piece 12 are integrally formed. Through the integrated structure and in cooperation with the support portion 5, the outer wall of the pipe sleeve 11 is supported at multiple points on the inner wall of the extruder outer barrel 7, thereby enhancing the support stability of the outer tube 1. At the same time, the support portion 5 can also play a flow-through role, and the eccentricity of the screw shaft 6 can be adjusted only by the guiding effect of the inner tube 2.

[0048] In one embodiment, please continue to refer to Figure 5 Each of the pipe sleeves 11 is provided with three supporting parts 5, wherein the connecting piece 12 and the three supporting parts 5 are evenly spaced and arranged on the outer wall of the corresponding pipe sleeve 11, and the surface of the supporting part 5 facing away from the pipe sleeve 11 is an arc surface.

[0049] The three support parts 5 and the connecting parts 12 are evenly spaced along the outer wall of the pipe sleeve 11. Figure 5 In the figure, for the left sleeve 11, the connecting piece 12 is located on the right side of the sleeve 11, and the three supporting parts 5 are respectively located on the upper, lower and left surfaces thereof; for the right sleeve 11, the connecting piece 12 is located on the left side of the sleeve 11, and the three supporting parts 5 are respectively located on the upper, lower and right surfaces thereof.

[0050] The above double-tube sleeve 11 is used to connect the six-point support method. After being assembled in place, it can play the role of a pressure ring through multiple support parts 5. There is a liquid fluid between the extruder outer barrel 7 and the extruder screw shaft 6. Please refer to Figure 5 A gap 51 is formed between two adjacent support parts 5. When the liquid material fluid passes through the support part 5, it flows through the gap 51 formed between the two adjacent support parts 5, thereby increasing the pressure of the liquid material flowing through this gap.

[0051] Moreover, it can also guide the liquid material, which helps the liquid material to change from turbulent flow to laminar flow. In addition, the six-point support method can make the outer tube 1 more uniformly stressed, reduce the eccentricity of the extruder screw shaft 6, and play the role of automatic centering.

[0052] In one embodiment, the inner wall of the inner tube 2 is provided with saw teeth 21, and the saw teeth 21 are in the shape of an involute spline. With the involute spline-shaped saw teeth 21 structure, when the extruder screw shaft 6 passes through the through hole 22 of the inner tube 2, the connection strength between the inner tube 2 and the extruder screw shaft 6 can be increased, so that the inner tube 2 can be engaged with the extruder screw shaft 6, and the stability during operation is improved.

[0053] It can be understood that the shape of the serrations 21 can be adjusted according to the thread shape of the extruder screw shaft 6 to ensure that the inner tube 2 is installed in place and stably engages with the extruder screw shaft 6.

[0054] In one embodiment, the outer tube 1 is made of a cobalt-based alloy. Cobalt-based alloy (cobalt-based cermet) is a hard alloy that is wear-resistant, corrosion-resistant, and resistant to high-temperature oxidation, also known as Stellite alloy. Since cobalt-based alloy has excellent wear and corrosion resistance, the materials of the inner tube 2, outer tube 1, and gasket 3 in the auxiliary support mechanism are all made of cobalt-based alloy, which can improve the wear resistance, corrosion resistance, and service life of the mechanism.

[0055] The utility model also proposes an extruder, please refer to Figure 6 The extruder is applied with the above-mentioned support structure, and the specific structure of the support structure refers to the above-mentioned embodiment. Since the extruder adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0056] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A support structure, characterized in that: The support structure comprises: An outer tube, wherein the outer tube has two mounting holes arranged opposite to each other; An inner tube, each of the mounting holes is provided with one inner tube; A support portion, wherein the outer wall of the outer tube has a support portion protruding in the radial direction of the inner tube; A gasket is provided at both ends of each inner tube, one end of the gasket is connected to the inner tube, and the other end protrudes along the axial direction of the inner tube.

2. The support structure according to claim 1, characterized in that A side of the gasket facing away from the inner tube is protruded along the axial direction of the inner tube to form an abutment portion, and the abutment portion and the gasket are arranged in a stepped shape.

3. The support structure according to claim 2, characterized in that: The diameter of the gasket is greater than or equal to the diameter of the inner tube, and the diameter of the abutting portion is smaller than the diameter of the gasket.

4. The support structure according to claim 1, characterized in that The inner wall of the inner tube is provided with saw teeth, and the saw teeth are in the shape of involute splines.

5. The support structure according to claim 1, characterized in that: The outer tube includes two tube sleeves and a connecting piece, wherein the connecting piece is arranged between the two tube sleeves, the tube sleeves are provided with the mounting holes, each of the mounting holes is correspondingly provided with one of the inner tubes, and the tube sleeves and the inner tubes are arranged in concentric circles.

6. The support structure according to claim 5, characterized in that The two pipe sleeves are integrally formed with the connecting piece.

7. The support structure according to claim 5, characterized in that Each of the pipe sleeves is provided with three supporting parts, wherein the connecting piece and the three supporting parts are evenly spaced and arranged on the outer wall of the corresponding pipe sleeve, and the surface of the supporting part facing away from the pipe sleeve is an arc surface.

8. The support structure according to claim 1, characterized in that A gap is formed between two adjacent support parts.

9. The support structure according to any one of claims 1 to 8, characterized in that The outer tube is made of cobalt-based alloy.

10. An extruder, characterized in that: The extruder is applied with the support structure according to any one of claims 1 to 9.

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