Corrugated pipe forming device

Abstract

The utility model relates to the technical field of corrugated pipe forming, in particular to a corrugated pipe forming device which comprises a machine table, a machine frame is fixedly installed at the top of the machine table, a plurality of upper dies and lower dies which are aligned with each other are fixedly installed at the top of the machine frame, and first hydraulic rods are installed at the positions, corresponding to the upper dies and the lower dies, of the machine frame. An extrusion head is fixedly installed at the left end of the first hydraulic rod, a plurality of sleeves are connected to the extrusion head, a plurality of spacer blocks are installed on the outer sides of the sleeves, a fixing head is fixedly installed at the position, coaxial with the extrusion head, of the left side of the rack, and a sleeve head is fixedly installed in the fixing head. The inner side and the outer side of the two ends of the metal pipe are fixed at the same time through the cooperation of the fixing head and the sleeve head and the cooperation of the spacer block and the sleeve, and during extrusion forming, the two ends not located in the mold range can also be protected, and deformation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe forming technology, specifically to a corrugated pipe forming device. Background Technology

[0002] A bellows is a tubular elastic sensing element made of foldable corrugated sheets connected along the folding and stretching direction. Bellows can be classified into two types according to their constituent materials: metal bellows and non-metal bellows. Metal bellows are formed using methods such as water expansion, pressure corrugation, and hydroforming.

[0003] When the hydraulic forming equipment uses a hydraulic rod to extrude the metal tube inside the mold, the metal tube at the hydraulic rod position is inside the mold, but the end of the metal tube outside the mold also lacks sufficient internal support. Only the pusher at the hydraulic rod position will partially extend into the metal tube, while the rest of the non-corrugated forming section of the metal tube lacks sufficient internal support. During extrusion, the metal tube may bend and deform inward, leading to forming failure. Utility Model Content

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0005] A corrugated pipe forming device includes a machine base, a frame fixedly installed on the top of the machine base, and multiple upper and lower molds aligned with each other fixedly installed on the top of the frame. A hydraulic rod is installed on the frame corresponding to the upper and lower molds. An extrusion head is fixedly installed on the left end of the hydraulic rod. Multiple sleeves are connected to the extrusion head, and multiple spacers are installed on the outside of the sleeves. A fixing head is fixedly installed on the left side of the frame at a position coaxial with the extrusion head, and a sleeve is fixedly installed inside the fixing head.

[0006] Furthermore, upper and lower clips are installed on both the left and right sides of the frame, and two positioning rods are fixed on each of the upper and lower clips. Holes are made on the upper and lower molds corresponding to the positions of the positioning rods, and the positioning rods pass through the holes to form a sliding installation between the upper and lower molds. The positioning rods fix the positions of the upper and lower molds, restricting them to sliding only horizontally.

[0007] Furthermore, both the sleeve and the extrusion head have pre-set connecting concave surfaces, and the sleeve has pre-set connecting inner concave surfaces at a position offset from the connecting outer concave surfaces. Multiple sleeves are connected end-to-end by threads connecting the connecting outer concave surfaces and connecting inner concave surfaces. The inner and outer concave surface features ensure that the inner and outer surfaces are flat after multiple sleeves are connected, which facilitates insertion into the metal tube.

[0008] Furthermore, the spacer block has an opening in the middle corresponding to the sleeve position, and a pre-set slot is provided on the spacer block corresponding to the positioning rod position. The positioning rod is located in the slot to form the spacer block for placement and installation. The opening facilitates the insertion and removal of the spacer block without the need for other structural assistance.

[0009] Furthermore, a fixed shaft is installed at the rear side of the frame, coaxially with the extrusion head and the fixing head. A sleeve roller is fixed on the fixed shaft corresponding to the positions of the upper and lower dies. Multiple separating racks are fixedly installed on the sleeve rollers. Each separating rack has a helical structure comprising two-thirds of the sleeve roller's circumference. The multiple separating racks abut against adjacent upper and lower dies. The separating racks further separate the adjacent upper and lower dies. Considering the thickness of the separating racks and the small gap between the adjacent upper and lower dies, the ends of the separating racks need to be sharpened to allow them to be inserted between the upper and lower dies for separation.

[0010] Furthermore, both the upper and lower dies have rounded chamfers on their rear tops. A motor is installed on the right side of the machine base corresponding to the right end of the fixed shaft, and the motor's output end is fixedly connected to the fixed shaft. The chamfer also facilitates the separation of multiple upper dies and multiple lower dies by the gearing rack. The motor drive eliminates the need for manual rotation. Since the position of the gearing rack is limited during operation, a servo motor or stepper motor, which allows for precise control of the rotation, can be used.

[0011] Furthermore, the lower end buckles on both sides of the frame are fixed to the corresponding positions of the frame, and a connecting beam is fixedly installed between the upper end buckles on both sides of the frame. The upper and lower end buckles are hinged together, and a support arm is fixedly installed on the rear top of the upper end buckle. A telescopic rod is hinged between the support arm and the corresponding position of the frame. When removing the formed corrugated pipe or placing the next metal pipe to be formed, the telescopic rod opens the upper and lower molds, facilitating the handling and placement operations.

[0012] Furthermore, a first fixing frame is fixedly installed on the left side of the frame at the height of the fixing head. A connecting rod is fixedly installed on the left end of the sleeve inside the fixing head, and the left end of the connecting rod abuts against the first fixing frame. A second fixing frame is installed on the left side of the first fixing frame, and a second hydraulic rod is installed on the second fixing frame. One end of the second hydraulic rod is fixedly connected to the connecting rod, and the other end of the connecting rod is inserted into the fixing head. When the second hydraulic rod is in operation, it can push the connecting rod and the sleeve to move, adjust the length of the metal tube inside the fixing head, and thus adjust the straight wall length of the corrugated pipe end.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This utility model uses a fixing head and a sleeve head to fix both ends of the metal tube simultaneously, both inside and outside, by using a spacer block and a sleeve. During extrusion molding, the ends that are not within the mold range can also be protected to avoid deformation.

[0015] 2. The multiple sleeves and spacers in this utility model can be adjusted in number as needed to adjust the straight pipe wall length at the end of the corrugated pipe, making it flexible in use.

[0016] 3. In this utility model, the upper and lower molds that are pressed together are separated again by the rotation of the splitting rack, which eliminates the need for manual operation and makes it convenient to use.

[0017] 4. In this utility model, the upper mold is rotated and opened by the telescopic rod, which facilitates the removal of the corrugated pipe after molding and the insertion of the next metal pipe to be molded, thus simplifying the operation. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a cross-sectional view of the present invention;

[0020] Figure 3 This is an enlarged view of point A in this utility model;

[0021] Figure 4 This is an enlarged view of point B in this utility model;

[0022] Figure 5 This is a cross-sectional view of the sleeve in this utility model;

[0023] Figure 6 This is a schematic diagram of the geared rack configuration in this utility model;

[0024] Figure 7 This is a perspective view of the geared rack in this utility model;

[0025] Figure 8 This is a schematic diagram of the use and installation of this utility model.

[0026] Reference numerals: 1. Machine base; 2. Machine frame; 3. Upper buckle; 4. Lower buckle; 5. Connecting beam; 6. Positioning rod; 7. Upper mold; 8. Lower mold; 9. Fixed head; 10. Extrusion head; 11. Spacer block; 12. Hydraulic rod one; 13. Connecting rod; 14. Sleeve head; 15. Fixed frame one; 16. Fixed frame two; 17. Hydraulic rod two; 18. Fixed shaft; 19. Sleeve roller; 20. Distributing rack; 21. Motor; 22. Bayonet; 23. Sleeve; 24. Connecting inner concave surface; 25. Connecting outer concave surface; 26. Support arm; 27. Telescopic rod. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0028] This application provides a corrugated pipe forming apparatus, mainly addressing the problem that during current corrugated pipe hydraulic forming, the metal pipe end lacks sufficient internal support, which may cause the metal pipe to bend inward and lead to forming failure during extrusion forming. The following technical solution is provided, which will be discussed in conjunction with... Figure 1 - Figure 8 Please provide a detailed explanation:

[0029] A corrugated pipe forming device includes a machine base 1, a frame 2 fixedly installed on the top of the machine base 1, upper end buckles 3 and lower end buckles 4 installed on the left and right sides of the frame 2, two positioning rods 6 fixed on the upper end buckles 3 and lower end buckles 4, and multiple upper molds 7 and lower molds 8 arranged between the upper end buckles 3 and lower end buckles 4 on both sides. The upper molds 7 and lower molds 8 have holes corresponding to the positions of the positioning rods 6, and the positioning rods 6 pass through the holes to form a sliding installation of the upper molds 7 and lower molds 8, and the upper molds 7 and lower molds 8 are aligned with each other.

[0030] A hydraulic rod 12 is installed on the frame 2 between the four positioning rods 6. The left end of the hydraulic rod 12 extends between the four positioning rods 6. An extrusion head 10 is fixedly installed on the left end of the hydraulic rod 12. Multiple sleeves 23 are connected to the extrusion head 10. Both the sleeves 23 and the extrusion head 10 have pre-set connecting outer concave surfaces 25. The sleeves 23 have pre-set connecting inner concave surfaces 24 at a position offset from the connecting outer concave surfaces 25. The multiple sleeves 23 are connected to each other by connecting outer concave surfaces 25 and connecting inner concave surfaces 24 to form a fixed connection. Multiple spacers 11 are installed on the outside of the sleeves 23. The spacers 11 have openings in the middle corresponding to the position of the sleeves 23. The spacers 11 have pre-set slots 22 corresponding to the positions of the positioning rods 6. The positioning rods 6 are located in the slots 22 to form the placement and installation of the spacers 11. A fixing head 9 is fixedly installed on the left side of the frame 2, coaxial with the extrusion head 10. A sleeve head 14 is fixedly installed inside the fixing head 9.

[0031] When in use, insert one end of the metal tube to be formed into the fixing head 9, and at the same time insert the sleeve 14 into the metal tube. The fixing head 9 and the sleeve 14 work together to fix the left end of the metal tube from the inside and outside. Then, move the upper mold 7 and the lower mold 8 to cover the metal tube, and control the hydraulic rod 12 to extend and push the extrusion head 10, sleeve 23 and spacer block 11 closer to the metal tube. The right end of the metal tube is inserted into the spacer block 11, and at the same time, the sleeve 23 is inserted into the right end of the metal tube. The spacer block 11 and the sleeve 23 work together to fix the right end of the metal tube from the inside and outside, so that both ends of the metal tube are completely wrapped.

[0032] Hydraulic rod 12 continues to work, pushing multiple upper molds 7 and lower molds 8 closer together. At the same time, extrusion head 10 pushes the right end of the metal tube. With the left end blocked by fixed head 9, the metal tube is extruded. The metal tube expands and deforms under the restriction of upper molds 7 and lower molds 8 to form a corrugated ring. Then hydraulic rod 12 continues to extrude, extruding the corrugated ring into a flat shape to complete the forming.

[0033] In some embodiments, a fixed shaft 18 is installed at the same height as the extrusion head 10 on the rear side of the frame 2. A sleeve roller 19 is fixed on the fixed shaft 18 at the position corresponding to the upper mold 7 and the lower mold 8. Multiple gear racks 20 are fixedly installed on the sleeve roller 19. The multiple gear racks 20 are all spiral structures with a diameter of two-thirds of the sleeve roller 19. The multiple gear racks 20 abut against the adjacent upper mold 7 and lower mold 8. The rear top of the upper mold 7 and the lower mold 8 are both rounded and chamfered. A motor 21 is installed on the machine base 1 on the right side of the frame 2 at the position corresponding to the right end of the fixed shaft 18. The output end of the motor 21 is fixedly connected to the fixed shaft 18.

[0034] After completing one corrugated pipe forming, the stacked upper molds 7 and lower molds 8 need to be separated at equal intervals to await the next corrugated pipe forming. At this time, the control motor 21 drives the fixed shaft 18 to rotate, which in turn drives the sleeve rollers 19 and the distributing rack 20 to rotate. The distributing rack 20 rotates and intervenes between the stacked upper molds 7 and lower molds 8, separating them at equal intervals. At the same time, the spiral structure of the distributing rack 20 allows the multiple upper molds 7 and lower molds 8 to separate in an orderly manner, starting from the leftmost end. Two-thirds of the sleeve roller 19 is set so that the remaining one-third of the sleeve roller 19... With the perimeter blank, when hydraulic rod 12 is working, the gear 20 first intervenes between the upper mold 7 and the lower mold 8. At this time, the metal tube is squeezed to form a wave shape. The upper mold 7 and the lower mold 8 are separated by the gear 20 and cannot get close. This is the first stage of forming, which squeezes the surface of the metal tube to form a wave shape. Then, the second stage of forming is carried out, which squeezes the larger wave shape to a flat state. At this time, the blank position of the sleeve roller 19 is rotated to the position of the upper mold 7 and the lower mold 8. The gear 20 is staggered from the upper mold 7 and the lower mold 8. When hydraulic rod 12 is working, it can push multiple upper molds 7 and lower molds 8 close to squeeze the wave shape until it is flat.

[0035] In some embodiments, the lower end buckles 4 on the left and right sides of the frame 2 are fixed to the frame 2 at the corresponding positions, and the upper end buckles 3 on the left and right sides of the frame 2 are fixedly installed with a connecting beam 5. The upper end buckles 3 and the lower end buckles 4 are hinged and fixed. A support arm 26 is fixedly installed on the rear side of the top of the upper end buckle 3. A telescopic rod 27 is hinged and installed between the support arm 26 and the frame 2 at the corresponding position. The telescopic rod 27 is any one of pneumatic, electric and hydraulic telescopic rods. In this embodiment, the telescopic rod 27 is a hydraulic telescopic rod.

[0036] When taking out the formed metal corrugated tube, control the telescopic rod 27 to retract. Utilize the fixing relationship between the lower end buckle 4 and the frame 2, as well as the hinge fixing relationship between the lower end buckle 4 and the upper end buckle 3, pull the upper end buckle 3 to rotate around the hinge position as the axis, so that the upper mold 7 and the lower mold 8 open. At this time, the metal corrugated tube can be taken out. Then, put the next metal tube to be formed into it, and control the telescopic rod 27 to work again to close the upper mold 7 and the lower mold 8 to wrap the metal tube. Then, the motor 21 works to separate the multiple upper molds 7 and lower molds 8 again to form continuous operation.

[0037] In some embodiments, a first fixing frame 15 is fixedly installed on the left side of the frame 2 at the height position corresponding to the fixing head 9. A connecting rod 13 is fixedly installed on the left end of the sleeve 14 inside the fixing head 9. The left end of the connecting rod 13 abuts against the first fixing frame 15. A second fixing frame 16 is installed on the left side of the first fixing frame 15. A second hydraulic rod 17 is installed on the second fixing frame 16. One end of the second hydraulic rod 17 is fixedly connected to the connecting rod 13. One end of the connecting rod 13 is inserted into the fixing head 9.

[0038] Adjustments can be made based on the different straight pipe wall length requirements at both ends of the corrugated pipe. When adjusting the left end, control the hydraulic rod 17 to work, driving the connecting rod 13 and the sleeve 14 to move within the fixed head 9, thereby adjusting the length of the metal pipe within the fixed head 9. The metal pipe within the fixed head 9 is not affected by the upper mold 7 and the lower mold 8 to produce a waveform. When adjusting the right end of the metal pipe, the required number of spacer blocks 11 and sleeves 23 can be disassembled and adjusted. The spacer block 11 is fixed to the positioning rod 6 through the position of the bayonet 22. When disassembling and assembling, tilt one spacer block 11 to disengage the bayonet 22 from the position of the positioning rod 6 so that it can be removed or installed. The sleeve 23 can be disassembled and assembled using the threaded connection between the beginning and end.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A corrugated pipe forming apparatus, comprising a machine base (1), a frame (2) fixedly mounted on the top of the machine base (1), and a plurality of mutually aligned upper molds (7) and lower molds (8) fixedly mounted on the top of the frame (2), characterized in that, Hydraulic rod 1 (12) is installed on the frame (2) at the position corresponding to the upper mold (7) and the lower mold (8). An extrusion head (10) is fixedly installed on the left end of the hydraulic rod 1 (12). Multiple sleeves (23) are connected to the extrusion head (10). Multiple spacer blocks (11) are installed on the outside of the sleeves (23). A fixing head (9) is fixedly installed on the left side of the frame (2) at the coaxial position with the extrusion head (10). A sleeve head (14) is fixedly installed inside the fixing head (9).

2. The corrugated pipe forming apparatus according to claim 1, characterized in that, The frame (2) is equipped with an upper buckle (3) and a lower buckle (4) on both the left and right sides. Two positioning rods (6) are fixed on the upper buckle (3) and the lower buckle (4). Holes are made on the upper mold (7) and the lower mold (8) corresponding to the positions of the positioning rods (6). The positioning rods (6) pass through the holes to form a sliding installation between the upper mold (7) and the lower mold (8).

3. The corrugated pipe forming apparatus according to claim 1, characterized in that, Both the sleeve (23) and the extrusion head (10) are provided with a connecting outer concave surface (25), and the sleeve (23) is provided with a connecting inner concave surface (24) at a position offset from the connecting outer concave surface (25). Multiple sleeves (23) are connected to each other by connecting outer concave surface (25) and connecting inner concave surface (24) to form a fixed connection end to end.

4. The corrugated pipe forming device according to claim 2, characterized in that, The spacer block (11) has an opening in the middle corresponding to the sleeve (23). A slot (22) is pre-set on the spacer block (11) corresponding to the position of the positioning rod (6). The positioning rod (6) is located in the slot (22) to form the placement and installation of the spacer block (11).

5. The corrugated pipe forming apparatus according to claim 1, characterized in that, A fixed shaft (18) is installed at the rear side of the frame (2) at the same height as the extrusion head (10) and the fixed head (9). A sleeve roller (19) is fixed on the fixed shaft (18) at the position corresponding to the upper mold (7) and the lower mold (8). Multiple sprockets (20) are fixedly installed on the sleeve roller (19). The multiple sprockets (20) are all spiral structures with a circumference of two-thirds of the sleeve roller (19). The multiple sprockets (20) abut against the adjacent multiple upper molds (7) and lower molds (8).

6. The corrugated pipe forming apparatus according to claim 5, characterized in that, The upper mold (7) and the lower mold (8) both have arc-shaped chamfers on their rear tops. A motor (21) is installed on the machine base (1) on the right side of the frame (2) at the right end of the fixed shaft (18). The output end of the motor (21) is fixedly connected to the fixed shaft (18).

7. The corrugated pipe forming apparatus according to claim 2, characterized in that, The lower end buckles (4) on the left and right sides of the frame (2) are fixed to the frame (2) at the corresponding positions. A connecting beam (5) is fixedly installed between the upper end buckles (3) on the left and right sides of the frame (2). The upper end buckles (3) and the lower end buckles (4) are hinged and fixed. A support arm (26) is fixedly installed on the rear side of the top of the upper end buckle (3). A telescopic rod (27) is hinged between the support arm (26) and the frame (2) at the corresponding position.

8. The corrugated pipe forming apparatus according to claim 1, characterized in that, A first fixing frame (15) is fixedly installed on the left side of the frame (2) at the height position corresponding to the fixing head (9). A connecting rod (13) is fixedly installed on the left end of the sleeve (14) inside the fixing head (9). The left end of the connecting rod (13) abuts against the first fixing frame (15). A second fixing frame (16) is installed on the left side of the first fixing frame (15). A second hydraulic rod (17) is installed on the second fixing frame (16). One end of the second hydraulic rod (17) is fixedly connected to the connecting rod (13). One end of the connecting rod (13) is inserted into the fixing head (9).

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