Circular ring pipeline cutting mechanism

Abstract

The utility model belongs to the technical field of pipeline cutting, and provides an annular pipeline cutting mechanism which comprises a fixed platform, a movable platform and two branch chain structures with the same structure, each branch chain structure is composed of two parallelogram mechanisms, the parallelogram mechanisms on the side of the fixed platform are fixed on the fixed platform, and the parallelogram mechanisms on the side of the movable platform are fixed on the movable platform. The movable platform side parallelogram mechanism is fixed to the fixed platform side parallelogram mechanism, and the fixed platform side parallelogram mechanism and the movable platform side parallelogram mechanism are located on two planes perpendicular to each other. The planes where the fixed platform side parallelogram mechanisms of the two branch chain structures are located are perpendicular to each other. The two movable platform side parallelogram mechanisms are connected through the movable platform connecting rod, the movable platform connecting rod is rotationally connected with the movable platform side parallelogram mechanisms, the movable platform is fixed to the middle of the movable platform connecting rod, and the cutting head is vertically arranged below the center of the movable platform. The mechanism can accurately cut two circular pipelines into intersecting line shapes, and the diameters of the two cut pipelines can be changed.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline cutting, relates to the penetration line cutting of circular pipes, and specifically is a circular pipe cutting mechanism. Background Technique

[0002] In actual production, it is often necessary to perform intersecting welding on two circular pipes. Before the intersecting welding of the pipes, it is necessary to first cut the welding edges of the two pipes to cut out the contour of the intersecting line in order to smoothly achieve welding. Most of the existing pipeline cutting devices are series pipeline cutting devices with disadvantages such as low precision, poor rigidity, and cumulative errors. And the existing parallel pipeline cutting devices are not convenient for accurately cutting pipes with different diameters. Utility Model Content

[0003] The purpose of the present utility model is to provide a circular pipe cutting mechanism that can cut two circular pipes according to needs such as welding and assembly, and accurately cut out the shape of the intersecting line formed by the intersection of the two circular pipes.

[0004] The technical solution adopted by the present utility model to achieve the above purpose is:

[0005] A circular pipe cutting mechanism includes a fixed platform, a moving platform, and two chain link structures with the same structure. Each chain link structure is composed of a fixed platform side parallelogram mechanism and a moving platform side parallelogram mechanism. The fixed platform side parallelogram mechanism is fixed on the fixed platform, and the moving platform side parallelogram mechanism is fixed on the fixed platform side parallelogram mechanism. The fixed platform side parallelogram mechanism and the moving platform side parallelogram mechanism are located in two mutually perpendicular planes; the planes where the fixed platform side parallelogram mechanisms of the two chain link structures are located are mutually perpendicular; the moving platform side parallelogram mechanisms of the two chain link structures are connected by a moving platform connecting rod, and the moving platform connecting rod is rotatably connected to the two moving platform side parallelogram mechanisms. The moving platform is fixed in the middle of the moving platform connecting rod, and a cutting head is vertically arranged below the center of the moving platform.

[0006] Preferably, the fixed platform side parallelogram mechanism is composed of a fixed platform moving pair, a fixed platform rotating pair, an upper fixed platform connecting rod, and a lower fixed platform connecting rod. The upper fixed platform connecting rod and the lower fixed platform connecting rod are arranged in parallel and are connected by not less than two fixed platform moving pairs. The two ends of each fixed platform moving pair are respectively connected to the upper fixed platform connecting rod and the lower fixed platform connecting rod through the fixed platform rotating pair. The axes of the fixed platform moving pairs on the same parallelogram mechanism are parallel to each other, and the axes of the fixed platform rotating pairs are parallel to each other.

[0007] Preferably, two fixed platform moving pairs are arranged in parallel at both ends of the upper fixed platform connecting rod and the lower fixed platform connecting rod respectively; a fixed platform moving pair is arranged in the middle of the upper fixed platform connecting rod and the lower fixed platform connecting rod.

[0008] Preferably, the parallelogram mechanism on the moving platform side includes a moving platform moving pair, an upper connecting rod of the moving platform, and a lower connecting rod of the moving platform. The upper connecting rod of the moving platform and the lower connecting rod of the moving platform are arranged in parallel and connected by no less than two moving platform moving pairs. The axes of the moving platform moving pairs on the same parallelogram mechanism on the moving platform side are parallel to each other.

[0009] Preferably, the upper connecting rod of the moving platform is rotationally connected to the connecting rod of the moving platform, the lower connecting rod of the moving platform is perpendicularly fixed to the upper connecting rod of the fixed platform, and the center point of the lower connecting rod of the moving platform intersects with the center point of the upper connecting rod of the fixed platform.

[0010] The beneficial effects of the present utility model are: it can accurately cut two circular pipes into the shape of an intersection line, and the diameters of the two pipes to be cut can be changed. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is a schematic diagram of the branch chain structure in the present utility model;

[0013] Figure 3 is a schematic diagram of two intersecting circular pipes in the present utility model;

[0014] In the figure: 1. Fixed platform; 2. Moving platform; 3. Branch chain structure one; 3-1. Fixed platform side parallelogram mechanism one; 3-2. Moving platform side parallelogram mechanism one; 3-3. Center point one of the upper connecting rod of the fixed platform; 3-4. Movement trajectory of the center point one of the upper connecting rod of the fixed platform; 4. Branch chain structure two; 4-1. Fixed platform side parallelogram mechanism two; 4-2. Moving platform side parallelogram mechanism two; 4-3. Center point two of the upper connecting rod of the fixed platform; 4-4. Movement trajectory of the center point two of the upper connecting rod of the fixed platform; 5. Connecting rod of the moving platform; 6. Cutting head; 7. Fixed platform moving pair; 7-1. First fixed platform moving pair; 7-2. Second fixed platform moving pair; 7-3. Third fixed platform moving pair; 7-4. Fourth fixed platform moving pair; 7-5. Fifth fixed platform moving pair; 8. Fixed platform rotating pair; 9. Upper connecting rod of the fixed platform; 10. And lower connecting rod of the fixed platform; 11. Moving platform moving pair; 11-1. First moving platform moving pair; 11-2. Second moving platform moving pair; 11-3. Third moving platform moving pair; 11-4. Fourth moving platform moving pair; 11-5. Fifth moving platform moving pair; 12. Upper connecting rod of the moving platform; 13. Lower connecting rod of the moving platform; 14. Pipe one; 14-1. Center line of pipe one; 15. Pipe two; 15-1. Center line of pipe two. Detailed Embodiments

[0015] To make the above - mentioned objects, features and advantages of the present utility model more obvious and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0016] As Figure 1 , Figure 2 shown, a circular - pipe cutting mechanism includes a fixed platform 1, a moving platform 2, and two chain - link structures 3 and 4 with the same structure. The chain - link structure 3 and the chain - link structure 4 are respectively composed of a fixed - platform - side parallelogram mechanism and a moving - platform - side parallelogram mechanism. The fixed - platform - side parallelogram mechanism is fixed on the fixed platform 1, and the moving - platform - side parallelogram mechanism is fixed on the fixed - platform - side parallelogram mechanism. The fixed - platform - side parallelogram mechanism and the moving - platform - side parallelogram mechanism are located in two mutually perpendicular planes; the plane where the fixed - platform - side parallelogram mechanism 3 - 1 of the chain - link structure 3 is located is perpendicular to the plane where the fixed - platform - side parallelogram mechanism 4 - 1 of the chain - link structure 4 is located; the moving - platform - side parallelogram mechanism 3 - 2 of the chain - link structure 3 and the moving - platform - side parallelogram mechanism 4 - 2 of the chain - link structure 4 are connected by a moving - platform connecting rod 5. The moving - platform connecting rod 5 is rotationally connected to the moving - platform - side parallelogram mechanism, and the moving platform 2 is fixed in the middle of the moving - platform connecting rod 5. A cutting head 6 is vertically arranged below the center of the moving platform 2.

[0017] The fixed - platform - side parallelogram mechanism is composed of a fixed - platform moving pair 7, a fixed - platform rotating pair 8, a fixed - platform upper connecting rod 9, and a fixed - platform lower connecting rod 10. The fixed - platform upper connecting rod 9 and the fixed - platform lower connecting rod 10 are arranged in parallel and are connected by a first fixed - platform moving pair 7 - 1, a second fixed - platform moving pair 7 - 2, a third fixed - platform moving pair 7 - 3, a fourth fixed - platform moving pair 7 - 4, and a fifth fixed - platform moving pair 7 - 5. Among them, the first fixed - platform moving pair 7 - 1 and the second fixed - platform moving pair 7 - 2 are arranged in parallel at one end of the fixed - platform upper connecting rod 9 and the fixed - platform lower connecting rod 10, the third fixed - platform moving pair 7 - 3 and the fourth fixed - platform moving pair 7 - 4 are arranged in parallel at the other end of the fixed - platform upper connecting rod 9 and the fixed - platform lower connecting rod 10, and the fifth fixed - platform moving pair 7 - 5 is arranged in the middle of the fixed - platform upper connecting rod 9 and the fixed - platform lower connecting rod 10. The two ends of each fixed - platform moving pair 7 are respectively connected to the fixed - platform upper connecting rod 9 and the fixed - platform lower connecting rod 10 through the fixed - platform rotating pair 8. The axes of the first fixed - platform moving pair 7 - 1, the second fixed - platform moving pair 7 - 2, the third fixed - platform moving pair 7 - 3, the fourth fixed - platform moving pair 7 - 4, and the fifth fixed - platform moving pair 7 - 5 are parallel to each other, and the axes of the fixed - platform rotating pairs 8 are parallel to each other.

[0018] The parallelogram mechanism on the moving platform side includes a moving platform moving pair 11, an upper connecting rod 12 of the moving platform, and a lower connecting rod 13 of the moving platform. The upper connecting rod 12 and the lower connecting rod 13 of the moving platform are arranged in parallel and are connected by a first moving platform moving pair 11-1, a second moving platform moving pair 11-2, a third moving platform moving pair 11-3, a fourth moving platform moving pair 11-4, and a fifth moving platform moving pair 11-5. Among them, the first moving platform moving pair 11-1 and the second moving platform moving pair 11-2 are arranged in parallel at one end of the upper connecting rod 12 and the lower connecting rod 13 of the moving platform. The third moving platform moving pair 11-3 and the fourth moving platform moving pair 11-4 are arranged in parallel at the other end of the upper connecting rod 12 and the lower connecting rod 13 of the moving platform. The fifth moving platform moving pair 11-5 is arranged in the middle of the upper connecting rod 12 and the lower connecting rod 13 of the moving platform. The axes of the first moving platform moving pair 11-1, the second moving platform moving pair 11-2, the third moving platform moving pair 11-3, the fourth moving platform moving pair 11-4, and the fifth moving platform moving pair 11-5 are parallel to each other. The upper connecting rod 12 of the moving platform is rotatably connected to the connecting rod 5 of the moving platform. The lower connecting rod 13 of the moving platform is perpendicularly fixed to the upper connecting rod 9 of the fixed platform, and the center point of the lower connecting rod 13 of the moving platform intersects with the center point of the upper connecting rod 9 of the fixed platform.

[0019] When using this cutting mechanism, as Figure 1 and Figure 3 shown, the steps for the intersecting line cutting of the circular ring pipe one 14 and the circular ring pipe two 15 are as follows:

[0020] First, install the pipes to be cut, namely pipe one 14 and pipe two 15:

[0021] The movement trajectory 3-4 of the center point 3-3 of the fixed platform upper connecting rod of the parallelogram mechanism 3-1 on the fixed platform side of the branch chain structure one 3 coincides with the center line 14-1 of the pipe one 14.

[0022] The movement trajectory 4-4 of the center point 4-3 of the fixed platform upper connecting rod of the parallelogram mechanism 4-1 on the fixed platform side of the branch chain structure two 4 coincides with the center line 15-1 of the pipe two 15.

[0023] Next, adjust the cutting mechanism according to the radius of the pipes to be cut:

[0024] 1. Adjust the length of the moving platform moving pair of the parallelogram mechanism on the moving platform side of the branch chain structure one 3 to be consistent with the radius of the pipe one 14 to be cut;

[0025] 2. Adjust the length of the moving platform moving pair of the parallelogram mechanism on the moving platform side of the branch chain structure two 4 to be consistent with the radius of the pipe two 15 to be cut;

[0026] 3. Lock the moving pair of the moving platform of the parallelogram mechanism on the side of the locking chain mechanism 3 and the chain structure 2 on the side of the moving platform of the parallelogram mechanism 4 for the moving platform.

[0027] Then, adjust the cutting mechanism according to the bending curvature radius of the pipeline to be cut:

[0028] 1. Adjust the length of the fixed platform moving pair of the parallelogram mechanism on the side of the chain structure 1 to be consistent with the bending curvature radius of the pipeline to be cut 14;

[0029] 2. Adjust the length of the fixed platform moving pair of the parallelogram mechanism on the side of the chain structure 2 to be consistent with the bending curvature radius of the pipeline to be cut 15;

[0030] 3. Lock the fixed platform moving pair of the parallelogram mechanism on the side of the locking chain mechanism 1 and the fixed platform moving pair of the parallelogram mechanism on the side of the chain structure 2.

[0031] Finally, place the end of the cutting head 6 on the pipeline 14, rotate any fixed platform rotating pair of the parallelogram mechanism on the side of the fixed platform of any chain mechanism to complete the cutting of the shape of the intersection line of the pipeline 14; place the end of the cutting head 6 on the pipeline 15, rotate any fixed platform rotating pair of the parallelogram mechanism on the side of the fixed platform of any chain mechanism to complete the cutting of the shape of the intersection line of the pipeline 15.

Claims

1. A circular pipe cutting mechanism, characterized in that: It includes a fixed platform, a moving platform and two identical branched-chain structures. Each branched-chain structure is composed of a parallelogram mechanism on the fixed-platform side and a parallelogram mechanism on the moving-platform side. The parallelogram mechanism on the fixed-platform side is fixed on the fixed platform, and the parallelogram mechanism on the moving-platform side is fixed on the parallelogram mechanism on the fixed-platform side. The parallelogram mechanism on the fixed-platform side and the parallelogram mechanism on the moving-platform side are located in two mutually perpendicular planes; the planes where the parallelogram mechanisms on the fixed-platform side of the two branched-chain structures are located are mutually perpendicular; the parallelogram mechanisms on the moving-platform side of the two branched-chain structures are connected by a moving-platform connecting rod. The moving-platform connecting rod is rotationally connected to the two parallelogram mechanisms on the moving-platform side. The moving platform is fixed in the middle of the moving-platform connecting rod, and a cutting head is vertically arranged below the center of the moving platform.

2. The cutting mechanism for a circular pipe according to claim 1, characterized in that: The parallelogram mechanism on the fixed-platform side is composed of a fixed-platform moving pair, a fixed-platform rotating pair, an upper connecting rod on the fixed platform and a lower connecting rod on the fixed platform. The upper connecting rod on the fixed platform and the lower connecting rod on the fixed platform are arranged in parallel and are connected by no less than two fixed-platform moving pairs. The two ends of each fixed-platform moving pair are respectively connected to the upper connecting rod on the fixed platform and the lower connecting rod on the fixed platform through fixed-platform rotating pairs. The axes of the fixed-platform moving pairs on the same parallelogram mechanism are parallel to each other, and the axes of the fixed-platform rotating pairs are parallel to each other.

3. The cutting mechanism for an annular pipeline according to claim 2, characterized in that: Two fixed-platform moving pairs are respectively arranged in parallel at both ends of the upper connecting rod on the fixed platform and the lower connecting rod on the fixed platform; a fixed-platform moving pair is arranged in the middle of the upper connecting rod on the fixed platform and the lower connecting rod on the fixed platform.

4. A circular pipe cutting mechanism according to claim 1, characterized in that: The parallelogram mechanism on the moving-platform side includes a moving-platform moving pair, an upper connecting rod on the moving platform and a lower connecting rod on the moving platform. The upper connecting rod on the moving platform and the lower connecting rod on the moving platform are arranged in parallel and are connected by no less than two moving-platform moving pairs. The axes of the moving-platform moving pairs on the same parallelogram mechanism on the moving-platform side are parallel to each other.

5. The cutting mechanism for a circular pipe according to claim 4, characterized in that: The upper connecting rod on the moving platform is rotationally connected to the moving-platform connecting rod, the lower connecting rod on the moving platform is vertically fixed to the upper connecting rod on the fixed platform, and the center point of the lower connecting rod on the moving platform intersects with the center point of the upper connecting rod on the fixed platform.

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