Large-diameter PE pipe automatic cutting and chamfering device

Abstract

The present application relates to the field of PE pipe production, especially to a large-diameter PE pipe automatic cutting and chamfering device, comprising a base, the top of the base is connected with symmetrically arranged support tables, the top of the base is provided with a support frame, a cutter is slidably connected to the support frame, symmetrically arranged guide rings are fixed in the base, a rotating frame is rotatably connected to the guide rings, a ring body is slidably connected to the outer side of the rotating frame, the ring body is provided with a plurality of electric clamps, symmetrically arranged first springs are connected between the cutter and the support frame, and a wedge-shaped ring frame is slidably connected to the inner side of the guide ring. The device uses a pipe rotating cooperation mechanism linkage to realize layered and gradual cutting, replaces the traditional one-cut operation, and drives the cutter to gradually feed by multiple rotations, so that the cutting stress is uniform and gentle, the PE pipe is prevented from edge collapse, cracking and deformation caused by instantaneous large cutting force, the cutting allowance is peeled layer by layer, the cut is smooth and smooth without secondary grinding and chamfering, and the pipe loss and processing defects are reduced.

Description

Technical Field

[0001] This invention relates to the field of PE pipe production, and in particular to an automatic cutting and chamfering device for large-diameter PE pipes. Background Technology

[0002] Large-diameter PE pipes, with their advantages of corrosion resistance, good flexibility, long service life, and environmental recyclability, are widely used in various fields such as municipal water supply, gas transmission, drainage projects, and petrochemicals, becoming one of the core pipe materials in modern pipeline systems.

[0003] Currently, the industry commonly uses a one-cut method for cutting and chamfering large-diameter PE pipes. This method uses a single cutting tool to complete both the cutting and chamfering of the pipe in one operation. While this method is simple in operation and has a concise equipment structure, it suffers from several unavoidable technical defects due to the large diameter, thick wall, and high toughness of large-diameter PE pipes. These defects severely affect the processing quality and subsequent performance. Specific problems are as follows:

[0004] First, during a single-cut process, the cutting tool must withstand significant cutting resistance at once, which can easily lead to poor flatness and excessive perpendicularity deviation of the cut end face, resulting in problems such as end face tilting, stepped protrusions, or depressions. This makes it impossible for the cut end face to maintain strict perpendicularity with the pipe axis. Second, the excessive instantaneous cutting force generated by a single cut can easily cause accelerated tool wear and tool breakage, which not only increases the frequency of tool replacement and processing costs but also leads to interruptions in the cutting process, reducing processing efficiency. In addition, the debris generated by tool breakage will adhere to the cut end face, requiring an additional manual cleaning process, further increasing labor costs and the complexity of the processing flow.

[0005] In view of the many drawbacks of the aforementioned one-cut method, the industry urgently needs an automatic cutting and chamfering device for large-diameter PE pipes to overcome these defects. Summary of the Invention

[0006] The technical implementation scheme of the present invention is as follows: an automatic cutting and chamfering device for large-diameter PE pipes, comprising a base, a symmetrically arranged support platform connected to the top of the base, a support frame provided on the top of the base, a cutter slidably connected to the support frame, symmetrically arranged guide rings fixed inside the base, a rotating frame rotatably connected to the guide rings, a ring body slidably connected to the outside of the rotating frame, multiple electric clamps provided on the ring body, a symmetrically arranged first spring connected between the cutter and the support frame, a wedge-shaped ring frame slidably connected to the inside of the guide rings, a symmetrically arranged fixing block connected to the cutter, multiple rotating columns rotatably connected to the fixing block, the wedge-shaped surfaces of the rotating columns and the wedge-shaped ring frame being pressed together, a torsion spring connected between the rotating columns and the fixing block, a stop plate connected to the side of the fixing block near the rotating columns, the stop plate being pressed together with the rotating columns, a stop component provided on the cutter for stopping the cutter, and a drive mechanism provided on the base for driving the rotating frame to rotate.

[0007] More preferably, the abutting component includes small wedge blocks, the support frame is connected to symmetrical small wedge blocks, the cutter is slidably connected to symmetrically arranged wedges, and a second spring connects the wedges and the cutter.

[0008] More preferably, the drive mechanism includes a large gear, which is fixed to the outside of the rotating frame. The base is connected to symmetrically arranged servo motors, and the output shaft of the servo motor is connected to a small gear, which meshes with the large gear.

[0009] More preferably, it also includes large wedge blocks, which are connected to the support frame and are pressed together with the wedges.

[0010] More preferably, it also includes a wedge frame, the symmetrically arranged wedge frames are slidably connected to the cutter, a third spring is connected between the wedge frame and the cutter, and the wedge has symmetrically arranged locking holes that are pressed together with the wedge frame.

[0011] More preferably, it also includes a first wedge block, the symmetrically arranged first wedge blocks are fixed on the top of the wedge frame, and the support frame is connected to a plurality of second wedge blocks, the bottom of the second wedge blocks and the first wedge blocks are pressed together.

[0012] More preferably, it also includes a dual-axis cylinder, which is fixed to the top of the base. The telescopic rod of the dual-axis cylinder is connected to a connecting block, and the connecting block is connected to a grinding block.

[0013] More preferably, it also includes a pull ring frame, which is rotatably connected to the outside of the ring body. The pull ring frame is rotatably connected to symmetrically arranged connecting rods. The top of the base is connected to symmetrically arranged guide seats. A push block is slidably connected to the guide seats. The push block and the connecting rod are rotatably connected. The push block and the grinding block are slidably connected. A fourth spring is connected between the push block and the grinding block.

[0014] More preferably, it also includes a pulling member, which is symmetrically arranged and fixed on the outer side of the wedge-shaped ring frame. The pulling member and the rotating frame are slidably connected, and the pulling member and the ring body are squeezed together.

[0015] More preferably, it also includes a fifth spring, which connects the pulling member and the rotating frame, and the fifth spring is wrapped around the outside of the pulling member.

[0016] Compared with the prior art, the present invention has the following advantages: 1. The device adopts the linkage of pipe rotation and mechanism to realize layered progressive cutting, replacing the traditional one-cut operation. Through multiple rotations, the cutter is driven to gradually press down and feed, and the cutting force is uniform and gentle, avoiding the chipping, cracking and deformation of PE pipe caused by instantaneous large cutting force. The cutting allowance is peeled off layer by layer, and the cut is smooth and flat without the need for secondary grinding and chamfering, reducing pipe loss and processing defects.

[0017] 2. This device optimizes the locking and resetting logic based on the linkage structure of large and small wedge blocks, automatically controls the extension and locking of the wedge parts, eliminating the need for manual unlocking and resetting, and greatly improving the degree of automation. Combined with the layered progressive cutting mode, the step-by-step pressing feed weakens the instantaneous cutting stress and avoids cracking, chipping and deformation of large-diameter PE pipes. Attached Figure Description

[0018] Figure 1 This is a first-view three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a second-view three-dimensional structural diagram of the present invention.

[0020] Figure 3 This is a partial three-dimensional structural cross-sectional view of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the rotating column, torsion spring, and abutment plate of the present invention.

[0022] Figure 5 For the present invention Figure 4 Enlarged diagram of point A in the middle.

[0023] Figure 6 This is a three-dimensional structural diagram of the rotating frame, ring body, and electric clamp of the present invention.

[0024] Figure 7 For the present invention Figure 1 Enlarged diagram of point B in the middle.

[0025] The components in the attached diagram are labeled as follows: 1. Base, 2. Support platform, 3. Large-diameter PE pipe, 4. Support frame, 5. Cutter, 6. Guide ring, 7. Rotating frame, 8. Ring body, 9. Electric clamp, 10. Large gear, 11. Servo motor, 12. Small gear, 13. First spring, 14. Wedge ring frame, 15. Fixing block, 16. Rotating column, 17. Torsion spring, 18. Support plate, 19. 20. Small wedge block; 21. Large wedge block; 22. Wedge component; 23. Second spring; 24. Locking hole; 25. Wedge frame; 26. Third spring; 27. First wedge block; 28. Second wedge block; 29. ​​Grinding block; 30. Dual-axis cylinder; 31. Connecting block; 32. Pulling ring frame; 33. Connecting rod; 34. Pushing block; 35. Guide seat; 36. Fourth spring; 37. Pulling component; 38. Fifth spring. Detailed Implementation

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] An automatic cutting and chamfering device for large-diameter PE pipes, such as Figures 1-4As shown, the device includes a base 1 and a support platform 2 connected to the top left and right sides of the base 1. The top of the support platform 2 is used to support a large-diameter PE pipe 3. A support frame 4 is welded to the top of the base 1. A cutter 5 is slidably connected to the upper middle of the support frame 4. Two guide rings 6 are fixedly connected inside the base 1. A rotating frame 7 is rotatably connected to each guide ring 6. A ring body 8 is slidably connected to the outer side of each rotating frame 7. Four equally spaced electric clamps 9 are arranged along the circumferential direction on the inner side of the ring body 8. Two first springs 13 are connected between the upper part of the cutter 5 and the support frame 4. A wedge-shaped ring frame 14 is slidably connected to the inner side of each guide ring 6. Fixing blocks 15 are connected to the left and right sides of the cutter 5. Four rotating columns 16 are rotatably connected to each fixing block 15. The wedge-shaped surfaces of the rotating columns 16 and the wedge-shaped ring frame 14 are pressed together. Each component is connected to a torsion spring 17. Each fixed block 15 is fixedly connected to a stop plate 18 on the side near the rotating column 16. The stop plate 18 and the rotating column 16 are pressed together. The upper part of the cutter 5 is provided with a stop assembly for stopping the cutter 5. The base 1 is provided with a drive mechanism for driving the rotating frame 7 to rotate. The stop assembly includes a small wedge block 19. Three small wedge blocks 19 are connected to the left and right sides of the support frame 4. The three small wedge blocks 19 are longitudinally distributed. Wedges 21 are slidably connected to the left and right sides of the upper part of the cutter 5. A second spring 22 is connected between the wedge 21 and the cutter 5. The drive mechanism includes a large gear 10. The large gear 10 is fixedly connected to the outside of the rotating frame 7. Servo motors 11 are connected to the left and right sides of the bottom of the base 1. The output shaft of the servo motor 11 is fixedly connected to a small gear 12. The small gear 12 and the large gear 10 mesh.

[0028] When using this automatic cutting and chamfering device for large-diameter PE pipes 3, the large-diameter PE pipe 3 can first be placed on the top of the support platform 2, with the pipe passing through the electric clamp 9. After placement, the electric clamp 9 is activated, clamping the large-diameter PE pipe 3. Subsequently, the cutter 5 and servo motor 11 are activated. The servo motor 11 drives the pinion 12 to rotate, which in turn drives the large gear 10 to rotate. The large gear 10 then drives the rotating frame 7 to rotate, which in turn drives the ring 8 to rotate. The ring 8 then drives the electric clamp 9 to rotate, which in turn rotates the large-diameter PE pipe 3. The frame 7 drives the wedge-shaped ring frame 14 to rotate. After the wedge-shaped surface of the wedge-shaped ring frame 14 contacts the rotating column 16, it will squeeze the bottom rotating column 16. At this time, because the bottom of the rotating column 16 is held by the abutment plate 18, the rotating column 16 will not swing downward and will push the rotating column 16 down. At the same time, the second bottom rotating column 16 will also fall. At this time, the second rotating column 16 will squeeze the wedge-shaped ring frame 14. Then the second rotating column 16 swings upward, and the torsion spring 17 is twisted. In this way, the second rotating column 16 will not generate resistance to the wedge-shaped ring frame 14. In addition, the downward movement of the rotating column 16 will drive the fixed block 15 and the cutter 5 to move downward. The downward movement of the cutter 5 can perform the second... The cutting process involves a single-level cut. As the cutter 5 descends, it causes the wedge-shaped component 21 to descend as well. After the wedge-shaped surface of the wedge-shaped component 21 contacts the wedge-shaped surface of the first small wedge block 19, the wedge-shaped component 21 moves inward, compressing the second spring 22. When the wedge-shaped component 21 separates from the small wedge block 19, the second spring 22 causes the wedge-shaped component 21 to move outward and reset. Thus, the wedge-shaped component 21 is then held in place by the first small wedge block 19, keeping the cutter 5 in a descending state. When the wedge-shaped ring frame 14 separates from the second rotating column 16, the rotating column 16 rotates back to its original position under the action of the torsion spring 17. After the large-diameter PE pipe 3 rotates one revolution, the wedge-shaped ring frame 14 also rotates one revolution. The wedge-shaped surface of the wedge ring frame 14 will continue to press the second rotating column 16 at the bottom, thus continuing to press the cutter 5 down. In this way, the cutter 5 will descend three times for every three rotations of the large-diameter PE pipe 3, achieving the effect of gradually cutting the large-diameter PE pipe 3, thus replacing the one-cut solution and avoiding the drawbacks of one-cut. After the cutting is completed, the wedge 21 needs to be manually moved inward to separate from the large wedge block 20, and the wedge ring frame 14 needs to be pushed outward to separate from the rotating column 16. Then, under the action of the first spring 13, the cutter 5 will be driven to move upward to reset, and the cutter 5, servo motor 11 and electric clamp 9 will be turned off.

[0029] like Figure 4As shown, it also includes a large wedge block 20, which is connected to the left and right sides of the support frame 4 respectively. The large wedge block 20 is located below the small wedge block 19, and the large wedge block 20 and the wedge member 21 are pressed together.

[0030] like Figure 4-Figure 4 As shown, it also includes a wedge frame 24. The symmetrically arranged wedge frames 24 are slidably connected to the upper part of the cutter 5. A third spring 25 is connected between the wedge frame 24 and the cutter 5. The wedge 21 has a locking hole 23 on both the front and rear sides. The locking hole 23 and the wedge frame 24 are pressed together.

[0031] like Figure 5 As shown, it also includes a first wedge block 26. The symmetrically arranged first wedge blocks 26 are all fixedly connected to the top of the wedge frame 24. Four second wedge blocks 27 are fixedly connected to the bottom middle of the support frame 4. The bottom of the second wedge block 27 and the first wedge block 26 are pressed together.

[0032] As mentioned earlier, the wedge 21 needs to be manually retracted inward to facilitate the upward reset of the cutter 5. Therefore, a large wedge block 20 is provided. When the wedge 21 contacts the small wedge block 19, the inward movement of the wedge 21 is relatively short, so the locking hole 23 on the wedge 21 and the wedge frame 24 will not engage. However, when the wedge 21 contacts the large wedge block 20, the inward movement of the wedge 21 is the longest, and the locking hole 23 and the wedge frame 24 will engage. At this time, under the action of the third spring 25, the wedge frame 24 is locked in the locking hole 23, thereby making the wedge... The wedge 21 remains in a retracted state, so there is no need for manual retraction of the wedge 21, which makes the whole device more automated. When the wedge ring frame 14 moves outward and separates from the rotating column 16, the first spring 13 will drive the cutter 5 to move upward and reset. When the second wedge block 27 contacts the first wedge block 26, it will push the first wedge block 26 to move outward. The third spring 25 is stretched, and the first wedge block 26 drives the wedge frame 24 to move outward. The outward movement of the wedge frame 24 will separate from the locking hole 23. Therefore, under the action of the second spring 22, the wedge 21 will move outward and reset.

[0033] like Figure 1 , Figure 2 and Figure 7 As shown, it also includes a dual-axis cylinder 29, which is fixedly connected to the top right side of the base 1. The ends of the telescopic rods of the dual-axis cylinder 29 are all fixedly connected to connecting blocks 30, and the inner sides of the connecting blocks 30 are all fixedly connected to grinding blocks 28.

[0034] After cutting, the two large-diameter PE pipes 3 can be pulled outward to create a gap between them. Then, the connecting block 30 is moved inward by the dual-axis cylinder 29. The inward movement of the connecting block 30 drives the grinding block 28 to move inward. After the grinding block 28 moves to the position of the cut surface of the large-diameter PE pipe 3, the servo motor 11 can be turned on. The servo motor 11 will cause the electric clamp 9 to rotate, which will drive the large-diameter PE pipe 3 to rotate, thereby achieving the grinding effect. After completion, the extension rod of the dual-axis cylinder 29 is stretched and reset, which drives the connecting block 30 and the grinding block 28 to move outward and reset. The servo motor 11 is then turned off.

[0035] like Figure 6 As shown, it also includes a pull ring frame 31, which is rotatably connected to the outside of the ring body 8. The front and rear sides of the pull ring frame 31 are rotatably connected to the connecting rods 32. The front and rear sides of the top of the base 1 are connected to the guide seats 34. The guide seats 34 are slidably connected to the push blocks 33. The push blocks 33 and the connecting rods 32 are rotatably connected. The push blocks 33 and the grinding blocks 28 are slidably connected. A fourth spring 35 is connected between the push blocks 33 and the grinding blocks 28.

[0036] As explained earlier, it is necessary to pull the two large-diameter PE pipes 3 outwards. To achieve this, the following scheme is implemented: When the connecting block 30 moves inwards, the connecting block 30, via the fourth spring 35, drives the pushing block 33 to move inwards. The inward movement of the pushing block 33, through the connecting rod 32, drives the pulling ring frame 31 to move outwards. This, in turn, causes the pulling ring frame 31 to move the electric clamp 9 outwards, thus pulling the two large-diameter PE pipes 3 outwards. This achieves the purpose of automatic pulling apart. After opening, the push block 33 is pushed inward to its limit and stops moving. At this time, the connecting block 30 continues to move, driving the grinding block 28 to continue moving between the two large-diameter PE pipe 3 end faces for grinding. At this time, the fourth spring 35 is compressed. When the connecting block 30 moves outward, it will drive the fourth spring 35 to be stretched. The connecting block 30 then drives the fourth spring 35 and the push block 33 to move outward to reset. The push block 33 then drives the pull ring frame 31 to move inward to reset via the connecting rod 32.

[0037] like Figure 6 As shown, it also includes a pulling member 36. The symmetrically arranged pulling members 36 are all fixedly connected to the outer side of the wedge-shaped ring frame 14. The pulling member 36 and the rotating frame 7 are slidably connected. The outer side of the pulling member 36 and the ring body 8 are pressed together. A fifth spring 37 is connected between the pulling member 36 and the rotating frame 7. The fifth spring 37 is wrapped around the outer side of the pulling member 36.

[0038] When the ring 8 moves outward, it drives the pulling member 36 to move outward. The outward movement of the pulling member 36 will cause the wedge ring frame 14 to move outward and separate from the rotating column 16. The fifth spring 37 is stretched. In this way, the wedge ring frame 14 can move outward automatically without manual pulling. When the ring 8 moves inward, it will release the pulling member 36. Under the action of the fifth spring 37, the pulling member 36 and the wedge ring frame 14 will move inward and reset.

[0039] The technical principles of the embodiments of the present invention have been described above with reference to specific examples. These descriptions are merely for explaining the principles of the embodiments of the present invention and should not be construed as limiting the scope of protection of the embodiments of the present invention in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these embodiments will all fall within the scope of protection of the embodiments of the present invention.

Claims

1. An automatic cutting and chamfering device for large-diameter PE pipes, comprising a base (1), a symmetrically arranged support platform (2) connected to the top of the base (1), a support frame (4) provided on the top of the base (1), a cutter (5) slidably connected to the support frame (4), a symmetrically arranged guide ring (6) fixed inside the base (1), a rotating frame (7) rotatably connected to the guide ring (6), a ring body (8) slidably connected to the outside of the rotating frame (7), and multiple electric clamps (9) provided on the ring body (8), characterized in that: A first spring (13) is symmetrically arranged between the cutter (5) and the support frame (4). A wedge-shaped ring frame (14) is slidably connected to the inside of the guide ring (6). A fixed block (15) is symmetrically arranged connected to the cutter (5). Multiple rotating columns (16) are rotatably connected to the fixed block (15). The wedge-shaped surfaces of the rotating columns (16) and the wedge-shaped ring frame (14) are pressed together. A torsion spring (17) is connected between the rotating column (16) and the fixed block (15). A stop plate (18) is connected to the side of the fixed block (15) near the rotating column (16). The stop plate (18) and the rotating column (16) are pressed together. A stop assembly is provided on the cutter (5). The stop assembly is used to stop the cutter (5). A drive mechanism is provided on the base (1). The drive mechanism is used to drive the rotating frame (7) to rotate.

2. The automatic cutting and chamfering device for large-diameter PE pipes as described in claim 1, characterized in that: The abutting component includes a small wedge (19), a support frame (4) is connected to symmetrical small wedges (19), a cutter (5) is slidably connected to symmetrically arranged wedges (21), and a second spring (22) is connected between the wedges (21) and the cutter (5).

3. The automatic cutting and chamfering device for large-diameter PE pipes as described in claim 2, characterized in that: The drive mechanism includes a large gear (10), which is fixed outside the rotating frame (7). The base (1) is connected to symmetrically arranged servo motors (11), and the output shaft of the servo motors (11) is connected to a small gear (12), which meshes with the large gear (10).

4. The automatic cutting and chamfering device for large-diameter PE pipes as described in claim 3, characterized in that: It also includes a large wedge block (20), which is connected to the support frame (4) and the large wedge block (20) and the wedge (21) are pressed together.

5. The automatic cutting and chamfering device for large-diameter PE pipes as described in claim 4, characterized in that: It also includes a wedge frame (24), which is symmetrically arranged and slidably connected to the cutter (5). A third spring (25) is connected between the wedge frame (24) and the cutter (5). The wedge (21) has symmetrically arranged locking holes (23), which are pressed together with the wedge frame (24).

6. The automatic cutting and chamfering device for large-diameter PE pipes as described in claim 5, characterized in that: It also includes a first wedge block (26), the first wedge block (26) is symmetrically arranged and fixed on the top of the wedge frame (24), and the support frame (4) is connected with multiple second wedge blocks (27), the bottom of the second wedge block (27) and the first wedge block (26) are pressed together.

7. The automatic cutting and chamfering device for large-diameter PE pipes as described in claim 6, characterized in that: It also includes a dual-axis cylinder (29), which is fixed on the top of the base (1). The telescopic rod end of the dual-axis cylinder (29) is connected to a connecting block (30), and the connecting block (30) is connected to a grinding block (28).

8. The automatic cutting and chamfering device for large-diameter PE pipes as described in claim 7, characterized in that: It also includes a pull ring frame (31), which is rotatably connected to the outside of the ring body (8). The pull ring frame (31) is rotatably connected to symmetrically arranged connecting rods (32). The top of the base (1) is connected to symmetrically arranged guide seats (34). A push block (33) is slidably connected to the guide seat (34). The push block (33) and the connecting rod (32) are rotatably connected. The push block (33) and the grinding block (28) are slidably connected. A fourth spring (35) is connected between the push block (33) and the grinding block (28).

9. The automatic cutting and chamfering device for large-diameter PE pipes as described in claim 8, characterized in that: It also includes a pull member (36), which is symmetrically arranged and fixed on the outside of the wedge-shaped ring frame (14). The pull member (36) and the rotating frame (7) are slidably connected, and the pull member (36) and the ring body (8) are squeezed together.

10. The automatic cutting and chamfering device for large-diameter PE pipes as described in claim 9, characterized in that: It also includes a fifth spring (37), which is connected between the pull member (36) and the rotating frame (7), and the fifth spring (37) is wrapped around the outside of the pull member (36).

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