Spiral pipe forming device and method

Abstract

The invention discloses a spiral pipe forming device. The spiral pipe forming device comprises a tool table; the fixed seat is fixed on the tool table; the nut is positioned on the fixed seat, a screw rod penetrates through the nut, and the screw rod is provided with a first end and a second end; one end of the expansion sleeve is connected with the second end, at least one through hole is formed in the side wall of the expansion sleeve, and an extrusion part is arranged at the at least one through hole; at least part of the expansion shaft is arranged in the expansion sleeve and faces the extrusion part, and the expansion shaft can move in the expansion sleeve so that the expansion shaft can drive the extrusion part to stretch out of the through hole to extrude the to-be-formed pipe fitting arranged outside the expansion sleeve in a sleeving mode; the positioning base is fixed to the tool table and used for positioning the pipe fitting to be formed. The invention further discloses a spiral pipe forming method. Through cooperation of the screw rod and the nut, the screw rod drives the expansion sleeve to move, the extrusion part directly extrudes the inner wall of the to-be-formed pipe fitting, a spiral is formed on the to-be-formed pipe fitting, the material cost, the labor cost and the forming time are saved, and the forming cost of the whole product is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and in particular to a spiral tube forming apparatus and method. Background Technology

[0002] Solar energy, a renewable energy source, has become an important component of clean energy for human use, receiving increasing attention and development. Photovoltaic panels are crucial components for converting solar energy into electricity, while photovoltaic (PV) ground piles, serving as supporting components for PV power generation, are buried underground to ensure the stability of the PV power generation system under various environmental conditions. Spiral tubes are an important part of PV ground piles. Currently, the existing spiral tube forming method uses external extrusion spiral forming. The working principle of external extrusion is to first prepare a large-diameter tube blank, and then extrude the outer circumference of the tube blank to reduce the diameter. This process is not only cumbersome but also wastes a large amount of material, resulting in high costs. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a spiral tube forming device and method.

[0004] To achieve the above objectives, an embodiment of the present invention provides the following technical solution:

[0005] A spiral tube forming apparatus, comprising:

[0006] Tooling table;

[0007] The mounting base is fixed to the tooling table;

[0008] A nut is positioned on the fixing seat, and a screw is inserted through the nut. The screw has a first end and a second end.

[0009] An expansion sleeve, one end of which is connected to the second end, and at least one through hole is provided on the side wall of the expansion sleeve, and an extrusion member is provided at the at least one through hole;

[0010] An expansion shaft is at least partially disposed within the expansion sleeve and facing the extruder. The expansion shaft is movable within the expansion sleeve so that the expansion shaft drives the extruder to extend out of the through hole and extrude the tube to be formed that is sleeved outside the expansion sleeve.

[0011] The positioning seat is fixed to the tooling table and is used to position the pipe to be formed.

[0012] As a further improvement of the present invention, the expansion shaft includes a cone, a cylinder, and a connecting body connected sequentially toward the other end of the expansion sleeve. The diameter of the cone gradually increases toward the other end of the expansion sleeve. The cone faces the extrusion member, and the connecting body is threadedly connected to the expansion sleeve.

[0013] As a further improvement of the present invention, the tensioning shaft also includes a cylindrical rod and a support rod connected to the connecting body.

[0014] As a further improvement of the present invention, the expansion sleeve is provided with a stepped hole through the axial direction. The stepped hole includes a first hole and a second hole that communicates with the first hole. The diameter of the second hole is larger than the diameter of the first hole. The second end is connected to the first hole. The through hole communicates with the second hole.

[0015] As a further improvement of the present invention, the first hole is a threaded hole, and the second end is threadedly connected to the first hole.

[0016] As a further improvement of the present invention, the positioning seat includes an upper positioning seat body and a lower positioning seat body connected to each other. The upper positioning seat body is provided with a first through groove on the side facing the lower positioning seat body, and the lower positioning seat body is provided with a second through groove on the side facing the upper positioning seat body.

[0017] As a further improvement of the present invention, the nut is positioned inside the fixing seat, the first end extends out of one end of the fixing seat, and the second end extends out of the other end of the fixing seat.

[0018] As a further improvement of the present invention, the upper part of the fixing base is provided with at least one mounting hole, and the at least one mounting hole is connected to the interior of the fixing base.

[0019] As a further improvement of the present invention, the extrusion component includes balls, rectangular blocks, or conical blocks.

[0020] A method for forming a spiral tube, using the aforementioned spiral tube forming apparatus, includes the following steps:

[0021] (1) Adjust the axial movement position of the expansion shaft in the expansion sleeve to adjust the position of the extrusion part at the through hole, and put the tube to be formed on the outside of the expansion sleeve;

[0022] (2) Continue to adjust the axial movement position of the expansion shaft in the expansion sleeve so that the extrusion member extends out of the through hole and extrudes the inner wall of the tube to be formed;

[0023] (3) Observe whether there is any change in the expansion height at the position of the extrusion piece on the outside of the tube to be formed. If there is no change, the expansion shaft moves into place and stops moving.

[0024] (4) Apply torque to the screw, the screw rotates and moves along the nut at the same time, the expansion sleeve moves with the screw, so that the extruder extrudes the tube to be formed while rotating and moving with the expansion sleeve, forming a spiral protrusion on the tube to be formed, and obtaining a spiral tube.

[0025] The beneficial effects of this invention are:

[0026] This invention has a simple structure and is easy to operate. The screw and nut work together to drive the expansion sleeve to move, which directly causes the extruder to press against the inner wall of the pipe to be formed, thereby forming a spiral on the pipe. There is no need to set up a large-diameter pipe first, which saves material costs, labor costs and forming time, greatly reducing the forming cost of the whole product and making the forming quality good. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a perspective view of a preferred embodiment of the present invention;

[0029] Figure 2 This is an exploded view of a preferred embodiment of the present invention;

[0030] Figure 3 This is a cross-sectional view of a preferred embodiment of the present invention;

[0031] Figure 4 for Figure 3 Enlarged diagram of A in the middle;

[0032] Figure 5 This is a schematic diagram of the ball ejection structure of a preferred embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of a preferred embodiment of the present invention, which is rotated into a spiral tube;

[0034] In the diagram: 1. Tooling table, 11. Base plate, 12. Support seat, 2. Fixing seat, 21. Mounting hole, 3. Nut, 4. Expansion sleeve, 41. Through hole, 42. Extruded part, 421. Ball bearing, 43. Stepped hole, 431. First hole, 432. Second hole, 5. Expansion shaft, 51. Cone, 52. Cylinder, 53. Connector, 54. Cylindrical rod, 55. Support rod, 6. Positioning seat, 61. Upper positioning seat body, 611. First through groove, 62. Lower positioning seat body, 621. Second through groove, 63. First screw, 7. Screw, 71. First end, 72. Second end, 8. Tube to be formed, 9. Spiral tube. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0036] Please see Figures 1-5 This application discloses a spiral tube forming apparatus, including a tooling table 1, a fixed base 2, a nut 3, an expansion sleeve 4, an expansion shaft 5, and a positioning seat 6. The tooling table 1 is used to position the fixed base 2 and the positioning seat 6, ensuring their stability. The fixed base 2 is fixed to the tooling table 1. The nut 3 is positioned on the fixed base 2, and a screw 7 passes through the nut 3. The screw 7 has a first end 71 and a second end 72. One end of the expansion sleeve 4 is connected to the second end 72. At least one through hole 41 is provided on the side wall of the expansion sleeve 4, and an extrusion member 42 is provided at the at least one through hole 41. The expansion shaft 5 is at least partially disposed inside the expansion sleeve 4 and faces the extrusion member 42. The expansion shaft 5 can move within the expansion sleeve 4 so that the expansion shaft 5 drives the extrusion member 42 to extend out of the through hole 41 and extrude the tube 8 to be formed, which is sleeved outside the expansion sleeve 4. The positioning seat 6 is fixed to the tooling table 1 and is used to position the tube 8 to be formed.

[0037] The fixed seat 2 and the positioning seat 6 are fixed in place, and the nut 3 is also fixed in place. The initial position of the expansion shaft 5 in the expansion sleeve 4 should ensure that the tube to be formed 8 can be easily and quickly put on the expansion sleeve 4. The expansion shaft 5 continues to move in the expansion sleeve 4. You can observe whether there is any change in the expansion height at the position of the extruder 42 on the outside of the tube to be formed 8. If there is no change, it means that the expansion shaft 5 has moved into place. At this time, the expansion shaft 5 no longer moves and is connected to the expansion sleeve 4 as a whole. The screw 7 cooperates with the nut 3. When torque is applied to the screw 7, the screw 7 rotates and moves along the nut 3. The screw 7 is connected to the expansion sleeve 4 as a whole, which drives the expansion sleeve 4 to move. This causes the extruder 42 to extrude the tube to be formed 8 and rotate and move with the expansion sleeve 4, forming a spiral protrusion on the tube to be formed 8, thus obtaining the spiral tube 9.

[0038] In this embodiment, the tensioning shaft 5 includes a cone 51, a cylinder 52, and a connecting body 53 connected sequentially towards the other end of the tensioning sleeve 4. The diameter of the cone 51 gradually increases towards the other end of the tensioning sleeve 4. The cone 51 faces the extruder 42, and the connecting body 53 is threadedly connected to the tensioning sleeve 4. Both the cone 51 and the cylinder 52 have gaps between themselves and the inner wall of the tensioning sleeve 4. Rotating the connecting body 53 allows the tensioning shaft 5 to move axially along the tensioning sleeve 4. When the tensioning shaft 5 moves towards one end of the tensioning sleeve 4, the cone 51 moves, causing the extruder 42 to extend out of the through hole 41. When the cylinder 52 contacts the extruder 42, it indicates that the tensioning shaft 5 has moved into place and is threadedly fastened inside the tensioning sleeve 4. To improve the strength and stability of the tensioning shaft 5, it is preferable that the cone 51, cylinder 52, and connecting body 5 are integrally formed and connected.

[0039] To improve the strength of the expansion shaft 5 and facilitate its rotation, the expansion shaft 5 preferably further includes a cylindrical rod 54 and a support rod 55 connected to the connecting body 53. Preferably, the support rod 55 has a hexagonal cross-section to facilitate its use with an internal hexagon tool.

[0040] Preferably, the expansion sleeve 4 is provided with a stepped hole 43 through it along the axial direction. The stepped hole 43 includes a first hole 431 and a second hole 432 connected to the first hole 431. The diameter of the second hole 432 is larger than the diameter of the first hole 431. The second end 72 is connected to the first hole 431. The through hole 41 is connected to the second hole 432.

[0041] To facilitate the detachable connection between the expansion sleeve 4 and the screw 7, and for ease of installation and maintenance, the first hole 431 is preferably a threaded hole, and the second end 72 is threadedly connected to the first hole 431. The second hole 432 is at least partially configured as a threaded hole to facilitate threaded connection with the connecting body 53.

[0042] In this embodiment, the extrusion member 42 includes a ball bearing 421. It is understood that the extrusion member 42 is not limited to a ball bearing 421; it can also be a rectangular block, a conical block, or other components, depending on the required helical cross-sectional shape, and is not limited here. In this embodiment, there are two through holes 41 and two extrusion members 42, with the two extrusion members 42 located at the two through holes 41 respectively, facilitating the formation of a double-ended thread.

[0043] In this embodiment, the positioning base 6 includes an upper positioning base 61 and a lower positioning base 62 connected to each other. The upper positioning base 61 has a first through groove 611 on the side facing the lower positioning base 62, and the lower positioning base 62 has a second through groove 621 on the side facing the upper positioning base 61. One end of the tube to be formed 8 rests in the second through groove 621 of the lower positioning base 62, and the upper positioning base 61 is placed on the lower positioning base 62. At this time, one end of the tube to be formed 8 is located within the space formed by the first through groove 611 and the second through groove 621. The upper positioning base 61 and the lower positioning base 62 press the end of the tube to be formed 8 tightly, preventing movement of the tube to be formed 8. The upper positioning base 61 and the lower positioning base 62 can be locked and fixed by multiple first screws 63.

[0044] Preferably, the cross-section of the first through groove 611 and the second through groove 621 are both arc-shaped. It is understood that they are not limited to arc-shaped cross-sections; the cross-sections of the first through groove 611 and the second through groove 621 can also be V-shaped.

[0045] Preferably, the nut 3 is positioned within the fixing seat 2, with its first end 71 extending out of one end of the fixing seat 2 and its second end 72 extending out of the other end. The nut 3 is positioned within the fixing seat 2 to improve its stability. The first end 71 extending out of the fixing seat 2 facilitates the application of torque to the first end 71, while the second end 72 extending out of the fixing seat 2 facilitates the fitting of the tube to be formed 8 onto the screw 7. Simultaneously, the screw 7 also provides support for the tube to be formed 8. Specifically, the nut 3 is interference-fitted within the fixing seat 2. To further improve the stability of the nut 3 within the fixing seat 2, the upper part of the fixing seat 2 preferably has at least one mounting hole 21, which communicates with the interior of the fixing seat 2. The nut 3 can be securely fixed within the fixing seat 2 by screwing a second screw (not shown in the figure) through the mounting hole 21 of the fixing seat 2.

[0046] To facilitate the application of torque to the first end 71, it is preferable that the cross-section of the first end 71 is hexagonal.

[0047] The preferred tooling table 1 includes a base plate 11 and a support base 12. The base plate 11 is fixedly connected to the support base 12, and the fixed base 2 and the positioning base 6 are both fixedly connected to the base plate 11.

[0048] In use, the device of this invention quickly places the tube to be formed 8 onto the expansion sleeve 4 and the screw 7. At this time, the ball 421 is located at the through hole 41 and facing the cone 51. Rotating the support rod 54 causes the expansion shaft 5 to move inside the expansion sleeve 4. When the cylinder 52 contacts the ball 421, the expansion shaft 5 has moved into place. Rotating the support rod 54 stops, and the connecting body 53 of the expansion shaft 5 is threadedly connected to the expansion sleeve 4. Torque is applied to the first end 71 of the screw 7, and the screw 7 moves along the nut 3. The screw 7 is connected to the expansion sleeve 4, thus driving the expansion sleeve 4 to move. This causes the extruder 42 to extrude the tube to be formed 8 while simultaneously moving with the expansion sleeve 4, forming a spiral protrusion on the tube to be formed 8, resulting in a spiral tube 9. Please refer to [link to relevant documentation]. Figure 6 As shown.

[0049] This application also discloses a spiral tube forming method using the above-mentioned spiral tube forming apparatus, including the following steps:

[0050] (1) Adjust the axial movement position of the tensioning shaft 5 in the tensioning sleeve 4 to adjust the position of the extrusion part 42 at the through hole 41, and put the tube to be formed 8 on the outside of the tensioning sleeve 4;

[0051] (2) Continue to adjust the axial movement position of the tensioning shaft 5 in the tensioning sleeve 4 so that the extrusion part 42 extends out of the through hole 41 to extrude the inner wall of the tube to be formed 8;

[0052] (3) Observe whether there is any change in the expansion height at the position of the extrusion part 42 on the outside of the tube to be formed 8. If there is no change, the expansion shaft 5 moves into place and stops moving.

[0053] (4) Apply torque to screw 7. Screw 7 rotates and moves along nut 3. Expansion sleeve 4 moves with screw 7, so that extruder 42 extrudes the tube to be formed 8 and rotates and moves with expansion sleeve 4, forming a spiral protrusion on tube to be formed 8, and obtaining spiral tube 9.

[0054] To better illustrate the spiral tube forming method of the present invention, the following are detailed steps.

[0055] (1) Rotate the support rod 55 of the expansion shaft 5. Since the connecting body 53 is threadedly connected to the expansion sleeve 4, the expansion shaft 5 moves axially in the expansion sleeve 4. The cone 51 of the expansion shaft 5 abuts against the ball 421. At this time, the ball 421 is located in the through hole 41 and does not protrude from the through hole 41. The tube to be formed 8 is sleeved on the expansion sleeve 4 and the screw 7.

[0056] (2) Continue to rotate the support rod 55 of the tensioning shaft 5 so that the tensioning shaft 5 moves toward the second end 72 of the screw 7. The cylinder 52 of the tensioning shaft 5 abuts against the ball 421 so that the ball 421 extends out of the through hole 41 and the ball 421 squeezes the inner wall of the tube to be formed 8.

[0057] (3) Observe whether there is any change in the expansion height at the position of the ball 421 on the outside of the tube to be formed 8. If there is no change, move the expansion shaft 5 into place and stop rotating the support rod 55.

[0058] (4) Apply torque to the first end 71 of the screw 7. The screw 7 rotates and moves along the nut 3. The expansion sleeve 4 moves with the screw 7. At this time, the expansion sleeve 4, the expansion shaft 5 and the ball 421 cooperate together, so that the ball 421 squeezes the tube to be formed 8 and rotates and moves with the expansion sleeve 4, forming a spiral protrusion on the tube to be formed 8, and obtaining the spiral tube 9.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A spiral tube forming device, characterized in that, include: Tooling table; The mounting base is fixed to the tooling table; A nut is positioned on the fixing seat, and a screw is inserted through the nut. The screw has a first end and a second end. An expansion sleeve, one end of which is connected to the second end, and at least one through hole is provided on the side wall of the expansion sleeve, and an extrusion member is provided at the at least one through hole; An expansion shaft is at least partially disposed within the expansion sleeve and facing the extruder. The expansion shaft is movable within the expansion sleeve so that the expansion shaft drives the extruder to extend out of the through hole and extrude the tube to be formed that is sleeved outside the expansion sleeve. The positioning seat is fixed to the tooling table and is used to position the pipe to be formed.

2. The spiral tube forming apparatus according to claim 1, characterized in that, The expansion shaft includes a cone, a cylinder, and a connecting body connected sequentially towards the other end of the expansion sleeve. The diameter of the cone gradually increases towards the other end of the expansion sleeve. The cone faces the extruder. The connecting body is threadedly connected to the expansion sleeve.

3. The spiral tube forming apparatus according to claim 2, characterized in that, The expansion shaft also includes a cylindrical rod and a support rod connected to the connecting body.

4. The spiral tube forming apparatus according to claim 1, characterized in that, The expansion sleeve is provided with a stepped hole through it along the axial direction. The stepped hole includes a first hole and a second hole that communicates with the first hole. The diameter of the second hole is larger than the diameter of the first hole. The second end is connected to the first hole. The through hole communicates with the second hole.

5. The spiral tube forming apparatus according to claim 4, characterized in that, The first hole is a threaded hole, and the second end is threadedly connected to the first hole.

6. The spiral tube forming apparatus according to claim 1, characterized in that, The positioning base includes an upper positioning base body and a lower positioning base body connected to each other. The upper positioning base body has a first through groove on the side facing the lower positioning base body, and the lower positioning base body has a second through groove on the side facing the upper positioning base body.

7. The spiral tube forming apparatus according to claim 1, characterized in that, The nut is positioned inside the fixing seat, with the first end extending out of one end of the fixing seat and the second end extending out of the other end of the fixing seat.

8. The spiral tube forming apparatus according to claim 7, characterized in that, The upper part of the fixing base is provided with at least one mounting hole, and the at least one mounting hole is connected to the interior of the fixing base.

9. The spiral tube forming apparatus according to claim 1, characterized in that, The extrusion component includes balls, rectangular blocks, or conical blocks.

10. A method for forming a spiral tube, characterized in that, Using the spiral tube forming apparatus as described in any one of claims 1-9 includes the following steps: (1) Adjust the axial movement position of the expansion shaft in the expansion sleeve to adjust the position of the extrusion part at the through hole, and put the tube to be formed on the outside of the expansion sleeve; (2) Continue to adjust the axial movement position of the expansion shaft in the expansion sleeve so that the extrusion member extends out of the through hole and extrudes the inner wall of the tube to be formed; (3) Observe whether there is any change in the expansion height at the position of the extrusion piece on the outside of the tube to be formed. If there is no change, the expansion shaft moves into place and stops moving. (4) Apply torque to the screw, the screw rotates and moves along the nut at the same time, the expansion sleeve moves with the screw, so that the extruder extrudes the tube to be formed while rotating and moving with the expansion sleeve, forming a spiral protrusion on the tube to be formed, and obtaining a spiral tube.

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