CN209920501U

CN209920501U - Double-screw type split charging barrel

Info

Publication number: CN209920501U
Application number: CN201920393985.7U
Authority: CN
Inventors: 胡海波
Original assignee: Zhejiang Bohai Machinery Co Ltd
Current assignee: Zhejiang Bohai Machinery Co Ltd
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2020-01-10
Anticipated expiration: 2029-03-26

Abstract

A double-screw type split charging barrel is divided into three sections from left to right, namely a first section, a second section and a third section, wherein a first section flanging is processed on the right side of the first section, and an inner sleeve is embedded in an inner hole of the first section in an interference fit manner; the right side of the second section is provided with a second section flanging, the first section and the second section are connected through connecting bolts, the second section and the third section are connected through connecting pins, the concentricity between the three sections is guaranteed through positioning pins in the connection process, the connection surface between the three sections is a plane, and the plane sealing effect is achieved through controlling the moment of the connecting bolts. Through changing the contact mode of connecting the face for the laminating area greatly increased of contact surface guarantees that the contact surface position can not take place to shake and vibrations in high-power production process, has improved the high pressure resistance of components of a whole that can function independently feed cylinder. The stability of the split charging barrel in a severe working environment is ensured.

Description

Double-screw type split charging barrel

Technical Field

The invention relates to a screw extrusion device, in particular to a double-screw split charging barrel.

Background

The domestic and foreign screw extrusion device can be divided into a single screw and a double screw according to the number of the screws, can be divided into a single material barrel, a double-section material barrel and a three-section material barrel according to the combination mode of the material barrels, and is influenced by factors such as the increase of the power of the extrusion device and the increase of the variety of raw materials, the length of the existing material barrel is more than 5M, and in order to facilitate processing and assembly, the material barrel generally adopts a split material barrel, and the existing domestic and foreign split material barrels are positioned by adopting a shaft shoulder during combination assembly. When the power is increased and the aperture of the charging barrel is larger than 350mm, the internal pressure of the charging barrel is increased, the working condition is deteriorated, due to the combined assembly method, the area of a joint surface is small at the joint of the aperture shaft, the bending resistance is poor at the position close to the center of the charging barrel, when external factors are changed, such as poor affinity of raw materials, coaxiality change caused by foundation settlement, resonance and the like, the connecting bolt is broken at the joint surface, and the damage of equipment and the casualty are caused.

Disclosure of Invention

Aiming at the defects in the problems, the invention provides a double-screw type split charging barrel for an extrusion granulator.

In order to achieve the purpose, the invention provides a double-screw type split charging barrel which is divided into three sections from left to right, namely a first section, a second section and a third section, wherein a first section flanging is processed on the right side of the first section, a second section flanging is processed on the right side of the second section, the first section and the second section are connected through connecting bolts, the second section and the third section are connected through connecting bolts, an inner sleeve is embedded in an inner hole of the first section in an interference fit mode, and a connecting surface between the first section and the second section is a plane.

As a further improvement of the invention, positioning pins are arranged at the joints between the first section and the second section and between the second section and the third section, and the positioning pins are distributed uniformly in 3.

As a further improvement of the invention, the inner sleeve is composed of 2 semi-arc-shaped cylinders, and the center distance between the semi-arc-shaped cylinders is consistent with the center distance between the screws.

As a further improvement of the invention, the material of the inner sleeve is Cr12 molybdenite, the thickness is 8mm, and the hardness HRC is 60.

As a further improvement of the invention, the interference magnitude of the interference bushing at the inner hole of the first section is 0.02 mm.

As a further improvement of the invention, the interference bushing is a conical bushing with the taper of 1: 25.

The invention has the beneficial effects that:

1. the junction between first segmentation and the second segmentation, between second segmentation and the third segmentation adopts the plane to be connected, guarantees the concentricity through the locating pin, makes the area increase of plane joint like this, and the joint enlarges towards the circumferential edge reason, and connecting bolt does not have the clearance in the department, and the bending strength of connecting the face grow, is suitable for powerful extruder.

2. The inner sleeve is installed at the inner hole of the first section by adopting a sleeve inlaying method, the service life of the extruder is prolonged by adopting the material of the inner sleeve, when the abrasion loss reaches the limit, only the inner sleeve needs to be replaced, and meanwhile, the replacement is convenient.

Drawings

FIG. 1 is a cross-sectional view of a twin-screw split charging barrel according to the present invention;

FIG. 2 is a view A-A of FIG. 1;

FIG. 3 is a view taken along the line B in FIG. 1;

FIG. 4 is a view taken along line C of FIG. 1;

FIG. 5 is an enlarged view of the portion D in FIG. 1;

FIG. 6 is a schematic diagram of a prior art connection method;

fig. 7 is an enlarged view of a portion E in fig. 6.

In the figure: 1. a first segment; 11. an inner sleeve; 12. first sectional flanging; 2. a second section; 21. second sectional flanging; 22. a second segmented right side; 3. a third segment; 31. a third segment left side; 4. a connecting bolt; 5. positioning pins; 6. fitting; 7. and (6) at the gap.

Detailed Description

As shown in fig. 1, the double-screw split charging barrel according to the embodiment of the invention is divided into three sections from left to right, which are a first section 1, a second section 2 and a third section 3, the right side of the first section 1 is processed with a first section flanging 12, the right side of the second section 2 is processed with a second section flanging 21, the first section 1 and the second section 2 and the third section 3 are connected through connecting bolts 4, an inner sleeve 11 is embedded in an inner hole of the first section 1 in an interference manner, the interference magnitude of the interference embedding in the inner hole of the first section 1 is 0.02mm, the interference embedding is a cone-shaped embedding, the taper is 1:25, the inner sleeve 11 is composed of 2 semicircular arc-shaped cylinders, and the center distance between the semicircular arc-shaped cylinders is consistent with the center distance between the screws. The inner sleeve 12 is made of Cr12 molybdenite, the thickness of the inner sleeve is 8mm, and the hardness HRC is 60. The connection surface between the connections is a plane. The junction installation locating pin 5 between first subsection 1 and the second subsection 2, between second subsection 2 and the third subsection 3, locating pin 5 is 3 evenly distributed.

Between first segmentation and the second segmentation, junction between second segmentation and the third segmentation adopts the plane to be connected, guarantees the concentricity through the locating pin, makes the area increase of plane joint like this, and the joint enlarges toward the circumferential edge reason, and connecting bolt does not have the clearance in the department, and the bending strength grow of connecting the face is suitable for powerful extruder. The inner sleeve is installed at the inner hole of the first section by adopting a sleeve inlaying method, the service life of the extruder is prolonged by adopting the material of the inner sleeve, when the abrasion loss reaches the limit, only the inner sleeve needs to be replaced, and meanwhile, the replacement is convenient.

In particular use, the invention will be described with reference to the accompanying drawings for the convenience of understanding;

in the prior art, as shown in fig. 6-7, the connection between the segments is realized by adopting a shaft shoulder positioning method, one side of a connecting surface is provided with a convex shoulder, one side of the other connecting surface is provided with a groove, the guiding is realized through the circumferential surface of the groove and the convex shoulder, a certain concentricity is ensured, the convex shoulder is placed in the groove, the plane of the convex shoulder and the plane of the groove are sealed, namely, a joint part 6 is realized, and at the moment, a certain gap, namely, a gap part 7 is formed between two planes at a connecting bolt part (namely, an outer circumference part). Since the joint 6 is close to the inner hole of the barrel, the joint surface cannot withstand large bending deformation, and the connecting bolt is easily broken.

The invention adopts a plane connection method, and the first section flanging 12 and the second section left side plane are connected through planes, and the second section side surface 22 and the third section left side surface 31 are connected through planes.

The specific installation method comprises the following steps: the first section 1 and the second section 2 are vertically placed, the positioning pins are placed after the holes of the positioning pins are aligned, the positioning bolts penetrate through the first section flanging 12 and then are screwed with the bolt holes in the left side face of the second section, and the first section flanging and the second section flanging are screwed up in a symmetrical mode. Second section 2 is installed in the same manner as third section 3.

Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a double-screw components of a whole that can function independently feed cylinder, turns right from a left side and divide into the three-section, is first segmentation (1), second segmentation (2) and third segmentation (3) respectively, the right side processing of first segmentation has first segmentation turn-ups (11), the right side processing second segmentation turn-ups (21) of second segmentation (2), be connected its characterized in that through connecting bolt (4) between first segmentation (1) and second segmentation (2), between second segmentation (2) and third segmentation (3): an inner sleeve (12) is embedded in the inner hole of the first section (1) in an interference mode, and the connecting surface between the first section and the second section is a plane.

2. A twin screw split cartridge according to claim 1, wherein: the positioning pins (5) are installed at the joints between the first section (1) and the second section (2) and between the second section (2) and the third section (3), and the positioning pins (5) are uniformly distributed in 3 rows.

3. A twin screw split cartridge according to claim 1, wherein: the inner sleeve (12) is composed of 2 semi-arc-shaped cylinders, and the center distance between the semi-arc-shaped cylinders is consistent with the center distance between the screws.

4. A twin screw split cartridge according to claim 3, wherein: the inner sleeve (12) is made of Cr12 molybdenite, the thickness of the inner sleeve is 8mm, and the hardness HRC is 60.

5. A twin screw split cartridge according to claim 1, wherein: the interference magnitude of the interference bushing at the inner hole of the first section (1) is 0.02 mm.

6. A twin screw split cartridge according to claim 5, wherein: the interference bushing is a conical bushing with the taper of 1: 25.