Device for eliminating extrusion twisting force of straw and soil composite pipe

Abstract

A straw and soil composite pipe extrusion rotation torsion eliminating device comprises a conical extrusion device, a plurality of guide ribs are evenly distributed on the inner side wall of a discharging pipe of the conical extrusion device, the guide ribs are arranged in the extrusion direction of the discharging pipe, the guide ribs are linear unthreaded shafts, the axial direction of the linear unthreaded shafts is consistent with the axial direction of the discharging pipe, and the guide ribs are arranged in the discharging pipe. The guide ribs evenly arranged on the inner side face of the discharging pipe can generate rotation resistance to the composite pipe in the circumferential direction, the rotation inertia generated by the composite pipe along with the auger is destroyed, the composite pipe is extruded out of the discharging pipe basically in a linear state, the phenomenon that the composite pipe is broken due to stress concentration generated by rotation is effectively avoided, and the service life of the composite pipe is prolonged. And the forming quality of the composite pipe is ensured.

Description

Technical Field

[0001] The present invention relates to the field of material transportation and forming, and particularly to a device for eliminating extrusion rotational torque of a straw and soil composite pipe. Background Art

[0002] The invention patent with the authorization announcement number CN114041405B discloses a device for cyclone mixing of soil, straw, and liquid and conical extrusion of straw soil composite pipes. Above the conical extrusion bin of this device, there is a cyclone mixing bin. Soil and crushed straw enter the cyclone mixing bin tangentially from the feeding pipeline. A spray head is provided at the upper end of the cyclone mixing bin and is connected to a liquid tank through a pipeline. The spray head sprays the liquid in the liquid tank into the cyclone mixing bin to mix with the soil and straw, and spirally descends along the inner wall of the cyclone mixing bin to fully mix and form a mixed material with a certain humidity, and then enters the conical extrusion bin. The spiral auger in the conical extrusion bin continuously compresses the mixed material and extrudes it into a forming circular pipe to form a cylindrical composite pipe body. During this process, the pipe forming rod at the outer end of the spiral auger leaves a circular channel in the middle of the cylindrical composite pipe body to form a circular composite pipe, and it is sent out through an S-shaped pipe conveyor.

[0003] The problem existing in the use of this device is that when the auger rotates and extrudes the mixed material, the mixed material will rotate with the rotation of the auger. Therefore, when the material is extruded to form a composite pipe and reaches the discharge port, the composite pipe still enters the lower conveyor pipe in a rotating state at the discharge port. When the friction force between the conveyor pipe and the composite pipe is greater than the rotational force of the composite pipe itself, it will cause large cracks on the surface of the formed composite pipe, and even breakage may occur, resulting in poor forming quality of the composite pipe and seriously affecting the irrigation function of the composite pipe, which needs to be improved. Summary of the Invention

[0004] In order to solve the above problems, the present invention proposes a device for eliminating extrusion rotational torque of a straw and soil composite pipe.

[0005] The technical solution of the present invention is: a device for eliminating extrusion rotational torque of a straw and soil composite pipe, including a conical extrusion device. A plurality of guiding rib strips are evenly distributed on the inner side wall of the discharge pipe of the conical extrusion device. The guiding rib strips are welded and fixed on the inner side wall of the discharge pipe, and the guiding rib strips are arranged along the extrusion direction of the discharge pipe.

[0006] Preferably, the guiding rib strips are linear optical axes. The axial direction of the linear optical axis is consistent with the axial direction of the discharge pipe. The diameter of the linear optical axis is reasonably selected according to the inner diameter of the discharge pipe, and anti-slip textures are provided on the surface of the linear optical axis. The diameter of the linear optical axis is less than 1 / 3 or 1 / 4 of the wall thickness of the discharge pipe.

[0007] Preferably, the linear optical axis is a variable-diameter optical axis, and its diameter gradually increases from the inner end to the outer end.

[0008] Preferably, the guiding rib is a spiral bent shaft, and the spiral direction of the spiral bent shaft is consistent with the rotation direction of the auger inside the conical extrusion device. The surface of the spiral bent shaft is provided with anti-slip textures to enhance the inhibitory effect on the rotation of the material.

[0009] Preferably, the spiral bent shaft is a variable-diameter spiral bent shaft, and its diameter gradually increases from the inner end to the outer end.

[0010] Preferably, the pitch of the spiral bent shaft gradually increases from the inner end to the outer end, so that a straight shaft section axially consistent with the discharge pipe is formed at the outer end of the spiral bent shaft.

[0011] Preferably, one end of the guiding rib is close to the inner port of the discharge pipe, and the other end is close to the outer port of the discharge pipe.

[0012] The beneficial technical effects of the present invention are as follows: (1) The guiding ribs uniformly arranged on the inner side surface of the discharge pipe in the present invention can generate rotational resistance to the composite pipe in the circumferential direction, destroy the rotational inertia of the composite pipe generated by the auger, and enable the composite pipe to be extruded from the discharge pipe in a substantially straight state, effectively solving the phenomenon of fracture of the composite pipe caused by stress concentration due to rotation and ensuring the forming quality of the composite pipe.

[0013] (2) Since the present invention reduces the situation of fracture of the composite pipe, the rejection rate in the production process is reduced, and it is not necessary to frequently stop the machine to handle the problems caused by the fracture of the composite pipe, thereby making the entire production process smoother, improving the production efficiency and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the internal structure of the existing conical extrusion device; Figure 2 is a three-dimensional structure diagram of one of the discharge pipe structures of the present invention; Figure 3 is Figure 2 the front view structure diagram of Figure 4 is Figure 3 the sectional view taken along the line A-A of Figure 5 is a three-dimensional structure diagram of another discharge pipe structure of the present invention; Figure 6 is Figure 5 the front view structure diagram of Figure 7 is Figure 6 the sectional view taken along the line B-B of Figure 8 is a three-dimensional structure diagram of yet another discharge pipe structure of the present invention; Figure 9 is Figure 8 the front view structural schematic diagram of; Figure 10 is Figure 9 the sectional view structural schematic diagram of along the C-C direction of; Figure 11 is Figure 10 the sectional view structural schematic diagram of along the D-D direction of; Figure 12 is the front view structural schematic diagram of the fourth of the discharge pipe structure of the present invention; In the figure, 11. Conical extrusion device, 21. Discharge pipe, 22. Linear optical axis, 23. Variable-diameter optical axis, 24. Spiral bent axis, 241. Linear axis section, 25. Variable-diameter spiral bent axis. Specific embodiments

[0016] Example 1. Refer to the appendix Figures 2 - 4 , A straw and soil composite pipe extrusion torsional force elimination device, including a conical extrusion device 11. A plurality of guiding rib strips are evenly distributed on the inner side wall of the discharge pipe 21 of the conical extrusion device 11. Specifically, four guiding rib strips can be set. The guiding rib strips are arranged along the extrusion direction of the discharge pipe 21. One end of the guiding rib strip is close to the inner port of the discharge pipe, and the other end is close to the outer port of the discharge pipe 21. The guiding rib strip is a linear optical axis 22, and the axial direction of the linear optical axis 22 is the same as the axial direction of the discharge pipe 21.

[0017] The mixed material enters the discharge pipe 21 from the conical extrusion device 11 to form a composite pipe. During this process, the linear optical axes 22 evenly distributed on the inner side surface of the discharge pipe 21 can generate rotational resistance to the composite pipe from the circumferential direction, destroying the rotational inertia generated by the composite pipe along with the auger, so that the composite pipe is basically extruded from the discharge pipe 21 in a straight line state, effectively solving the phenomenon of fracture of the composite pipe caused by stress concentration generated by rotation and ensuring the forming quality of the composite pipe.

[0018] Example 2. Refer to the appendix Figures 5 - 7 , A straw and soil composite pipe extrusion torsional force elimination device, including a conical extrusion device 11. A plurality of guiding rib strips are evenly distributed on the inner side wall of the discharge pipe of the conical extrusion device. The guiding rib strips are arranged along the extrusion direction of the discharge pipe 21. One end of the guiding rib strip is close to the inner port of the discharge pipe 21, and the other end is close to the outer port of the discharge pipe 21. The guiding rib strip is a linear optical axis 22, and the axial direction of the linear optical axis is the same as the axial direction of the discharge pipe 21. The linear optical axis 22 is a variable-diameter optical axis 23, and its diameter gradually increases from the inner end to the outer end. Through the variable-diameter design of the linear optical axis 22 in this embodiment, the rotational resistance of the composite pipe gradually increases during the process of being extruded outward in the discharge pipe 21, and the rotational inertia generated by the composite pipe along with the auger is released in a stepwise manner from small to large, making the stress release process relatively gentle and conducive to further improving the forming quality of the pipe.

[0019] Example 3. Refer to the appendix Figures 8 - 11 A device for eliminating the rotational torsion of a straw and soil composite pipe extrusion, comprising a conical extrusion device 11. A plurality of guiding rib strips are evenly distributed on the inner side wall of the discharge pipe 21 of the conical extrusion device. The guiding rib strips are arranged along the extrusion direction of the discharge pipe 21, and the guiding rib strips are spiral bent shafts 24. The spiral direction of the spiral bent shaft is the same as the rotation direction of the auger inside the conical extrusion device 11. The pitch of the spiral bent shaft 24 gradually increases from the inner end to the outer end, so that the outer end of the spiral bent shaft 24 forms a straight shaft section 241 that is axially consistent with the discharge pipe 21.

[0020] The mixed material enters the discharge pipe 21 in a rotating state from the conical extrusion device 11 and forms a composite pipe. The spiral bent shafts 24 evenly distributed on the inner side surface of the discharge pipe 21 generate rotational resistance on the composite pipe. Since the spiral direction of the spiral bent shaft 24 is the same as the rotation direction of the composite pipe and the pitch gradually increases from the inner end to the outer end, when the composite pipe just enters the discharge pipe 21, it rotates forward along the spiral direction of the spiral bent shaft 24. As the pitch increases, the rotational resistance gradually increases, gradually destroying the rotational inertia of the composite pipe. When the composite pipe reaches the straight shaft section 241 of the spiral bent shaft 24, the composite pipe is basically in a straight state, effectively solving the phenomenon of the fracture of the composite pipe caused by stress concentration due to rotation and ensuring the forming quality of the composite pipe.

[0021] One end of the guiding rib strip is close to the inner port of the discharge pipe 21, and the other end is close to the outer port of the discharge pipe 21.

[0022] Example 4. Refer to the appendix Figure 12 A device for eliminating the rotational torsion of a straw and soil composite pipe extrusion, comprising a conical extrusion device 11. A plurality of guiding rib strips are evenly distributed on the inner side wall of the discharge pipe 21 of the conical extrusion device 11. The guiding rib strips are arranged along the extrusion direction of the discharge pipe 21, and the guiding rib strips are spiral bent shafts 24. The spiral direction of the spiral bent shaft 24 is the same as the rotation direction of the auger inside the conical extrusion device 11. The pitch of the spiral bent shaft 24 gradually increases from the inner end to the outer end, so that the outer end of the spiral bent shaft 24 forms a straight shaft section 241 that is axially consistent with the discharge pipe 21. And the spiral bent shaft 24 is a variable-diameter spiral bent shaft 25, and its diameter gradually increases from the inner end to the outer end. Through the variable-diameter design of the spiral bent shaft 24 in this embodiment, while the spiral bent shaft 24 itself spirally releases the rotational resistance, the gradually increasing diameter of the spiral bent shaft 24 generates an increasing resistance. The combination of the two can gradually release the rotational inertia of the composite pipe generated by the auger from small to large in a stepped manner, making the stress release process more gentle and conducive to further improving the forming quality of the pipe.

[0023] One end of the guiding rib strip is close to the inner port of the discharge pipe 21, and the other end is close to the outer port of the discharge pipe 21.

Claims

1. A device for eliminating torsion force of straw and soil composite pipe extrusion, comprising a conical extrusion device, characterized in that: The inner side wall of the discharge pipe of the conical extrusion device is evenly distributed with a plurality of guide ribs, and the guide ribs are arranged along the extrusion direction of the discharge pipe.

2. The device for eliminating torsional force of straw and soil composite pipe extrusion according to claim 1 is characterized by: The guide rib is a linear optical axis, and the axial direction of the linear optical axis is consistent with the axial direction of the discharge pipe.

3. The device for eliminating torsion force of straw and soil composite pipe extrusion according to claim 2 is characterized in that: The linear optical axis is a variable diameter optical axis, and its diameter gradually increases from the inner end to the outer end.

4. The device for eliminating torsion force of straw and soil composite pipe extrusion according to claim 1 is characterized in that: The guide rib is a spiral bent shaft, and the spiral direction of the spiral bent shaft is consistent with the rotation direction of the auger inside the conical extrusion device.

5. The device for eliminating torsion force of straw and soil composite pipe extrusion according to claim 4 is characterized in that: The spiral bent shaft is a variable diameter spiral bent shaft, the diameter of which gradually increases from the inner end to the outer end.

6. The device for eliminating torsional force of straw and soil composite pipe extrusion according to claim 5 is characterized by: The pitch of the spiral bent shaft gradually increases from the inner end to the outer end, so that the outer end of the spiral bent shaft forms a straight shaft section that is consistent with the axial direction of the discharge pipe.

7. A device for eliminating torsional force of extrusion of straw and soil composite pipe according to any one of claims 1 to 6, characterized in that: One end of the guide rib is close to the inner port of the discharge pipe, and the other end is close to the outer port of the discharge pipe.

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