Extrusion head of radial extrusion pipe making machine

Abstract

The utility model relates to the technical field of pipeline manufacturing equipment, and discloses an extrusion head of a radial extrusion pipe making machine, which comprises a vertically arranged central rotating shaft, the central rotating shaft is sequentially provided with a first extrusion roller and a second extrusion roller from top to bottom, and a stirring plectrum is arranged above the first extrusion roller and the second extrusion roller. The stirring shifting piece, the first extrusion roller and the second extrusion roller share the same rotating center, a plurality of first crushing teeth are arranged on the stirring shifting piece, the movement direction of the first crushing teeth is crossed with the blanking direction of the pipe-making raw materials, and the pipe-making raw materials are cut and scattered through the arrangement of the first crushing teeth, so that the pipe-making raw materials are distributed more uniformly; and the density uniformity of the pipe wall of a finished pipe is improved, and the quality of the finished pipe is improved.

Description

Technical Field

[0001] This utility model relates to the field of pipe manufacturing equipment technology, and in particular to the extrusion head of a radial extrusion pipe making machine. Background Technology

[0002] Radial extrusion pipe making machines are simple to operate, have low noise, and high production efficiency. They are a commonly used concrete pipe manufacturing and processing equipment. The setting of the extrusion head can effectively improve the surface quality of the finished pipe wall. Radial extrusion pipes are mostly set vertically, with the material inlet located above the forming die. The material feeding system guides the pipe making raw material to the area around the extrusion roller.

[0003] In the existing technology, the mixing blades above the extrusion roller are all flat. Although the angle settings are different, their functions are the same, which is to only serve to distribute the material. Due to problems such as the adhesion of concrete raw materials and uneven feeding at the inlet, after the concrete raw materials are distributed by the mixing blades and introduced into the perimeter of the extrusion roller, uneven distribution will occur, resulting in differences in the wall density of the finished pipe, affecting the durability of the finished pipe and posing potential quality and safety hazards. Utility Model Content

[0004] The purpose of this invention is to provide a radial extrusion pipe making machine extrusion head, which makes the concrete raw materials more refined after being mixed and stirred, increases the uniformity of the material distribution, and improves the quality of the finished pipe.

[0005] To address the aforementioned technical problems, the embodiments of this utility model provide the following technical solutions:

[0006] A radial extrusion tube forming machine extrusion head includes a vertically erected central rotating shaft. The central rotating shaft is provided with a first extrusion roller and a second extrusion roller from top to bottom. A stirring blade is provided above the first extrusion roller. The stirring blade, the first extrusion roller, and the second extrusion roller share the same rotation center. The stirring blade is provided with a plurality of first crushing teeth. The movement direction of the first crushing teeth is intersected with the material feeding direction of the tube forming material.

[0007] Furthermore, the stirring paddle is also provided with a plurality of second crushing teeth, which are alternately arranged with the first crushing teeth.

[0008] Furthermore, the stirring blade includes a base plate, the first crushing teeth are disposed on the same surface of the base plate, and the base plate between adjacent first crushing teeth is provided with through-holes for quicksand.

[0009] Furthermore, the first crushing tooth is conical, and the direction of movement of the conical tip of the first crushing tooth intersects with the direction of material falling into the tube.

[0010] Furthermore, the upper and lower tooth surfaces of the first breaking tooth are arc-shaped surfaces.

[0011] Furthermore, the distance between the apex of the second crushing tooth cone and the base plate is less than the distance between the apex of the first crushing tooth cone and the base plate.

[0012] Furthermore, the radius of rotation of the first extrusion roller around the central axis is smaller than the radius of rotation of the second extrusion roller around the central axis.

[0013] Furthermore, the central rotating shaft includes a first rotating shaft and a second rotating shaft that are rotatably arranged relative to each other, the stirring blade is arranged circumferentially along the first rotating shaft, and the first extrusion roller and the second extrusion roller are arranged circumferentially along the second rotating shaft.

[0014] Compared with the prior art, this utility model's embodiment, through the setting of the first crushing tooth, cuts and disperses the tube-making raw material, making the raw material distribution more uniform, which is beneficial to improving the uniformity of the density of the finished tube wall and improving the quality of the finished tube. By alternating the second crushing tooth with the first crushing tooth, the tube-making raw material is cut twice, further improving the effect of the stirring blade in dispersing and refining the tube-making raw material, improving the uniformity of the density of the finished tube wall and improving the quality of the finished tube. The sand-flowing holes set in the two adjacent first crushing teeth effectively reduce the weight of the stirring blade itself, reduce the equipment load, and increase the durability of the equipment. Some of the tube-making raw material can be diverted and discharged to the surrounding area through the sand-flowing holes under the action of centrifugal force and rotational force, which helps to reduce the resistance of the stirring blade and increase its durability. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0016] Figure 1 This is a three-dimensional structural diagram of the extrusion head of the radial extrusion tube making machine in an embodiment of this utility model;

[0017] Figure 2 This is the stirring paddle structure in the first embodiment of this utility model;

[0018] Figure 3 This is the stirring paddle structure in the second embodiment of the utility model;

[0019] Figure 4 This is the stirring paddle structure in the third embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the stirring blade from different perspectives in the third embodiment of the utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Rotating connecting plate; 2. Central rotating shaft; 21. First rotating shaft; 22. Second rotating shaft; 3. Stirring blade; 31. Base plate; 32. First crushing tooth; 321. Lower tooth surface; 322. Upper tooth surface; 33. Second crushing tooth; 34. Flowing sand hole; 4. First extrusion roller; 5. Second extrusion roller; 6. Power chuck; 7. Support rod; 8. Support rod. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0023] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] like Figure 1 As shown, this utility model provides an extrusion head for a radial extrusion tube forming machine, including a vertically arranged central rotating shaft 2. A first extrusion roller 4 and a second extrusion roller 5 are arranged axially along the central rotating shaft 2. The first extrusion roller 4 and the second extrusion roller 5 can rotate about the central rotating shaft 2. There are multiple first extrusion rollers 4, which are evenly distributed around the central rotating shaft 2, that is, the first extrusion rollers 4 are distributed on the same circumference about the central rotating shaft 2. There are also multiple second extrusion rollers 5, which are evenly distributed around the central rotating shaft 2, that is, the second extrusion rollers 5 are distributed on the same circumference about the central rotating shaft 2. Preferably, the first extrusion roller 4 is arranged on the upper layer of the second extrusion roller 5, and the rotation radius of the first extrusion roller 4 around the central rotating shaft 2 is smaller than the rotation radius of the second extrusion roller 5 around the central rotating shaft 2. A stirring blade 3 is provided above the first extrusion roller 4. There are multiple stirring blades 3, which are evenly distributed around the central axis 2. The stirring blades 3 are used to evenly guide the tube-making raw material input from above to the periphery of the first extrusion roller 4. The tube is then extruded and shaped by the first extrusion roller 4 and the second extrusion roller 5, thereby improving the uniformity of the tube wall density of the finished tube, increasing the density of the tube wall, and improving the quality of the finished tube.

[0025] In an exemplary example, the central rotating shaft 2 further includes a first rotating shaft 21 and a second rotating shaft 22, which are rotatable relative to each other. A stirring blade 3 is circumferentially arranged along the first rotating shaft 21 and is fixedly mounted on the first rotating shaft 21 via a support rod 7, rotating synchronously with the first rotating shaft 21. A first extrusion roller 4 and a second extrusion roller 5 are circumferentially arranged along the second rotating shaft 22 and are fixedly mounted on the second rotating shaft 22 via a support rod 8, rotating synchronously with the second rotating shaft 22. This allows the stirring blade 3 to rotate at a different speed than the first extrusion roller 4, enabling speed adjustment based on the differences in the raw material composition for pipe making, thus achieving optimized fabric distribution. Preferably, one end of the first rotating shaft 21 is connected to a motor via a rotating connecting disc 1, thereby driving the first rotating shaft 21 to rotate. One end of the second rotating shaft 22 is connected to a motor via a power chuck 6, thereby driving the second rotating shaft 22 to rotate.

[0026] like Figure 2 As shown, in order to improve the uniformity of the tube-making material distribution, in the first embodiment provided by this utility model, the stirring blade 3 includes a base plate 31, on which a plurality of first crushing teeth 32 are provided. The plurality of first crushing teeth 32 are spaced apart on the same surface of the base plate 31. During the rotation of the stirring blade 3, the first crushing teeth 32 can crush the tube-making material, preventing uneven distribution due to the adhesion of the tube-making material. After being cut and refined by the first crushing teeth 32, the tube-making material is guided to the surrounding area under the action of centrifugal force, thereby effectively improving the uniformity of the radial extrusion tube-making machine distribution and improving the uniformity of the tube wall density of the finished tube. Preferably, in order to further improve the effect of the stirring blade 3 in cutting and breaking up the tube-making material and refining the tube-making material, the first crushing teeth 32 are set as cones. The cone teeth are provided with an upper tooth surface 322 and a lower tooth surface 321. In order to further increase the guiding effect and reduce the resistance of the stirring blade 3 in distributing the material, the upper tooth surface 322 and the lower tooth surface 321 are set as arc surfaces.

[0027] like Figure 3 As shown, in the second embodiment of this utility model, in order to further refine the tube-making raw material and enhance the dispersing effect on the tube-making raw material, the stirring blade 3 is also provided with a second crushing tooth 33. The second crushing tooth 33 is disposed between the first crushing tooth 32, that is, the second crushing tooth 33 and the first crushing tooth 32 are alternately disposed on the same surface of the base plate 31. Preferably, the second crushing tooth 33 is conical, and the height of the cone apex of the second crushing tooth 33 from the base plate 31 is less than the height of the cone apex of the first crushing tooth 32 from the base plate 31. The arrangement of the first crushing tooth 32 and the second crushing tooth 33 enables the stirring blade 3 to have a double cross-cutting function on the tube-making raw material, which is beneficial to further refine the tube-making raw material, increase the uniformity of the tube-making raw material distribution, and increase the density of the tube wall of the finished tube.

[0028] like Figure 4-5 As shown, in the third embodiment of this utility model, based on the first embodiment, a sand-flowing hole 34 is added. The sand-flowing hole 34 is a through hole set on the bottom plate 31. The sand-flowing hole 34 is set between two adjacent first crushing teeth 32. The sand-flowing hole 34 can effectively reduce the weight of the stirring blade 3 itself, reduce the load on the power output device, and increase the durability of the device. On the other hand, after the tube-making material is broken up by the first crushing teeth 32, some of the tube-making material can be diverted and discharged to the surrounding area from the sand-flowing hole 34 under the action of centrifugal force and rotational force, which helps to reduce the resistance of the stirring blade 3 and increase the durability of the stirring blade 3.

[0029] The radial extrusion tube making machine extrusion head provided by this utility model, through the setting of the first crushing tooth, cuts and disperses the tube making raw material, making the raw material distribution more uniform, which is conducive to improving the uniformity of the density of the tube wall of the finished tube and improving the quality of the finished tube. By alternating the second crushing tooth with the first crushing tooth, the tube making raw material is cut twice, further improving the effect of the stirring blade in dispersing and refining the tube making raw material, improving the uniformity of the density of the tube wall of the finished tube and improving the quality of the finished tube. By setting the sand flow hole between two adjacent first crushing teeth, the weight of the stirring blade itself is effectively reduced, reducing the load on the equipment and increasing the durability of the equipment. Under the action of centrifugal force and rotational force, some of the tube making raw material can be diverted from the sand flow hole to the surrounding area, which helps to reduce the resistance of the stirring blade and increase the durability of the stirring blade.

[0030] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An extrusion head for a radial extrusion tube forming machine, characterized in that, It includes a vertically erected central rotating shaft, from top to bottom, a first extrusion roller and a second extrusion roller are arranged on the central rotating shaft, a stirring blade is arranged above the first extrusion roller, the stirring blade is at the same rotation center as the first extrusion roller and the second extrusion roller, and a plurality of first crushing teeth are arranged on the stirring blade, the movement direction of the first crushing teeth is intersected with the material falling direction of the tube making material.

2. The extrusion head of the radial extrusion tube making machine according to claim 1, characterized in that, The stirring blade is also provided with a plurality of second crushing teeth, which are alternately arranged with the first crushing teeth.

3. The extrusion head of the radial extrusion tube making machine according to claim 1, characterized in that, The stirring blade includes a base plate, the first crushing teeth are disposed on the same surface of the base plate, and the base plate between adjacent first crushing teeth is provided with through-holes for quicksand.

4. The extrusion head of the radial extrusion tube forming machine according to claim 2, characterized in that, The first crushing tooth is conical, and the direction of movement of the conical tip of the first crushing tooth intersects with the direction of material falling into the tube.

5. The extrusion head of the radial extrusion tube forming machine according to claim 4, characterized in that, The upper and lower tooth surfaces of the first breaking tooth are arc-shaped.

6. The extrusion head of the radial extrusion tube making machine according to claim 5, characterized in that, The distance between the apex of the second crushing tooth cone and the base plate is less than the distance between the apex of the first crushing tooth cone and the base plate.

7. The extrusion head of the radial extrusion tube making machine according to claim 1, characterized in that, The radius of rotation of the first extrusion roller around the central axis is smaller than the radius of rotation of the second extrusion roller around the central axis.

8. The extrusion head of the radial extrusion tube forming machine according to any one of claims 1-7, characterized in that, The central rotating shaft includes a first rotating shaft and a second rotating shaft that can be rotatably arranged relative to each other. The stirring blade is arranged circumferentially along the first rotating shaft, and the first extrusion roller and the second extrusion roller are arranged circumferentially along the second rotating shaft.

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