A kind of edge planing device for PE gas pipe

Abstract

The utility model relates to a kind of for PE gas pipe's planing device, belong to gas pipeline planing equipment technical field.Left cutting half ring, right cutting half ring and left positioning half ring and right positioning half ring are semicircular ring shape respectively, left cutting half ring and right cutting half ring one end are hinged by pin shaft, left cutting half ring and right cutting half ring other end are provided with first lug plate respectively, and first lug plate is detachably locked by first locking bolt;Left positioning half ring and right positioning half ring one end are hinged by pin shaft, left positioning half ring and right positioning half ring other end are provided with second lug plate respectively, and second lug plate is detachably locked by second locking bolt;The planing device solves the problem that the existing flanging planing is not complete, and the planing flatness is inconsistent, which increases the risk of slow crack source of PE gas pipe, and the problems of pipe crack propagation and rupture.

Description

Technical Field

[0001] This utility model relates to a planing device for PE gas pipes, belonging to the technical field of gas pipeline planing equipment. Background Technology

[0002] PE gas pipes are gas transmission pipes made of polyethylene. When repairing or rerouting gas pipelines, the connection between old and new PE pipes requires butt fusion welding. However, this process creates a heat-fused flange. This flange can act as a slow crack initiation point for the PE gas pipe. To mitigate this effect, the flange needs to be planed.

[0003] The existing edge-planing equipment is mainly pipe edge planers. Patent publication number CN213675550U discloses a pipe edge planer, which includes a body, a planer blade, a ratchet mechanism, and a flanging and clamping mechanism. The planer blade is fixed on the body, and the body has a planing slit at the position of the planer blade. The front of the body has a first positioning block and a second positioning block that contact the circumferential surface of the pipe at the positions in front of and behind the planer blade. The back of the body has a ratchet mechanism and a flanging and clamping mechanism. In use, the ratchet mechanism is rotated counterclockwise by reciprocating the handle. The gear of the ratchet mechanism rolls on the edge planer, which will drive the edge planer to move along the edge planer on the outer surface of the pipe, so that the planer blade continuously cuts off the edge planer.

[0004] Although this pipe edge planer can remove the flared edges of PE gas pipes, it requires manual control to move the planer around the outer surface of the pipe. In some complex on-site environments, the limited space between the PE gas pipe and the ground makes it inconvenient to reciprocate the handle of the pipe edge planer to drive the ratchet mechanism. This results in incomplete edge removal, requiring manual trimming with a blade. Manual trimming is not only time-consuming and labor-intensive but also reduces the efficiency of the PE gas pipe edge planing. Furthermore, the manual trimming method is affected by individual differences among workers, leading to inconsistent edge flatness, which increases the risk of slow crack initiation in the PE gas pipe, causing crack propagation and rupture. Therefore, it is necessary to improve this design. Summary of the Invention

[0005] The purpose of this utility model is to provide a tool for edge planing of PE gas pipes that does not require a handle to reciprocate and drive a ratchet mechanism to move the edge planer around the outer surface of the pipe for edge planing. At the same time, it solves the problems of incomplete edge planing, inconsistent edge flatness caused by manual recutting, which increases the risk of slow cracking in PE gas pipes and leads to pipe crack propagation and rupture.

[0006] The technical solution of this utility model is: A planing device for PE gas pipes includes a left cutting half-ring, a right cutting half-ring, a left positioning half-ring, and a right positioning half-ring, wherein the left cutting half-ring, the right cutting half-ring, the left positioning half-ring, and the right positioning half-ring are all semi-circular rings, characterized in that: One end of the left cutting half ring and the right cutting half ring are hinged by a pin, and the other end of the left cutting half ring and the right cutting half ring are respectively provided with a first ear plate. The first ear plates are detachably locked together by a first locking bolt. One end of the left positioning half ring and the right positioning half ring are hinged by a pin, and the other end of the left positioning half ring and the right positioning half ring are respectively provided with a second ear plate. The second ear plates are detachably locked together by a second locking bolt. The left cutting half-ring and the left positioning half-ring are connected by a first guide component, and the right cutting half-ring and the right positioning half-ring are connected by a second guide component; Multiple cutting blades are spaced apart on the inner sides of the left and right cutting semi-rings, and limit bosses are provided on the inner sides of the left and right positioning semi-rings.

[0007] The left cutting half-ring, right cutting half-ring, left positioning half-ring, and right positioning half-ring are each equipped with an arc-shaped throttle via a connecting rod on their outer circumference.

[0008] The first guide assembly and the second guide assembly each include a guide rod and a locking nut. The guide rods are symmetrically arranged, and the left and right positioning half rings corresponding to the guide rods are provided with guide holes. Each guide rod extends through the guide hole to the outside of the left and right positioning half rings, respectively. Locking nuts are threaded on the guide rods extending to the outside of the left and right positioning half rings, and the locking nuts are in contact with the left and right positioning half rings.

[0009] The cutting blade and the limiting boss are misaligned.

[0010] The cutting blade is a triangular curved blade.

[0011] The limiting boss is a semi-circular ring.

[0012] The advantages of this utility model compared with the prior art are as follows: The edge-cutting device for PE gas pipes uses cutting blades in the left and right cutting semi-rings and limiting bosses in the left and right positioning semi-rings to limit the edge of the PE gas pipe. The cutting blade tip pierces the edge until it contacts the end faces of the left and right positioning semi-rings. Then, the operator holds the arc-shaped handle and controls the left and right cutting semi-rings, as well as the left and right positioning semi-rings, to rotate counterclockwise. Simultaneously, the triangular curved blade rotates counterclockwise. During this rotation, the cutting edge of the triangular curved blade cuts the edge of the PE gas pipe. This edge-cutting device can completely cut off the flange of a PE gas pipe without rotating it a full circle. The cut flange of the PE gas pipe is circular, and the worker only needs to cut the flange with a blade to remove it. This edge-cutting device for PE gas pipes does not require the reciprocating motion of the hand to drive the ratchet mechanism to move the edge cutter around the outer surface of the pipe for edge removal. At the same time, it solves the problem of incomplete edge removal and the risk of inconsistent edge flatness due to manual recutting, which increases the risk of slow cracking in PE gas pipes and leads to pipe crack propagation and rupture. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view structural diagram of the present utility model; Figure 3 This is a side view of the structure of this utility model; Figure 4 for Figure 3 A cross-sectional three-dimensional structural diagram along the central AA direction; Figure 5 for Figure 3 A cross-sectional three-dimensional structural diagram along the BB direction.

[0014] In the diagram: 1. Left cutting half ring; 2. Right cutting half ring; 3. Left positioning half ring; 4. Right positioning half ring; 5. Connecting rod; 6. Arc-shaped throttle; 7. First ear plate; 8. First locking bolt; 9. Pin; 10. Second ear plate; 11. Second locking bolt; 12. Guide rod; 13. Locking nut; 14. Cutting blade; 15. Limiting boss. Detailed Implementation

[0015] As attached Figure 1-5 As shown The edge-cutting device for PE gas pipes includes a left cutting half-ring 1, a right cutting half-ring 2, a left positioning half-ring 3, and a right positioning half-ring 4. The left cutting half-ring 1, the right cutting half-ring 2, the left positioning half-ring 3, and the right positioning half-ring 4 are all semi-circular rings. Arc-shaped handles 6 are fixedly installed on the outer circles of the left cutting half-ring 1, the right cutting half-ring 2, the left positioning half-ring 3, and the right positioning half-ring 4 through connecting rods 5. In use, the user can drive the left cutting half-ring 1, the right cutting half-ring 2, the left positioning half-ring 3, and the right positioning half-ring 4 to rotate along the circumference of the PE gas pipe through the arc-shaped handles 6.

[0016] One end of the left cutting half ring 1 and the right cutting half ring 2 are hinged by a pin 9, and the other end of the left cutting half ring 1 and the right cutting half ring 2 are respectively provided with a first ear plate 7. The first ear plates 7 are detachably locked together by a first locking bolt 8. The left positioning half-ring 3 and the right positioning half-ring 4 are hinged at one end by a pin 9, and the other end of the left positioning half-ring 3 and the right positioning half-ring 4 are respectively provided with a second ear plate 10. The second ear plates 10 are detachably locked together by a second locking bolt 11. The left cutting half-ring 1 and the left positioning half-ring 3 are connected by a first guide assembly, and the right cutting half-ring 2 and the right positioning half-ring 4 are connected by a second guide assembly.

[0017] The first guide assembly and the second guide assembly each include a guide rod 12 and a locking nut 13. The guide rods 12 are symmetrically arranged, and one end of the guide rod 12 is fixedly connected to the left cutting half ring 1 and the right cutting half ring 2. The left positioning half ring 3 and the right positioning half ring 4 corresponding to the guide rod 12 are provided with guide holes. Each guide rod 12 extends through the guide hole to the outside of the left positioning half ring 3 and the right positioning half ring 4 respectively. The locking nut 13 is threaded on the guide rod 12 extending to the outside of the left positioning half ring 3 and the right positioning half ring 4. The locking nut 13 is in contact with the left positioning half ring 3 and the right positioning half ring 4. In use, the guide rods 12 of the first guide assembly and the second guide assembly ensure the stability of the left positioning half ring 3 and the left cutting half ring 1, as well as the right positioning half ring 4 and the right cutting half ring 2 when they move in opposite directions. When the locking nut 13 limits the left positioning half ring 3 and the right positioning half ring 4, the cutting blade 14 can smoothly carry out the cutting operation.

[0018] Two cutting blades 14 are spaced apart on the inner sides of the left cutting half-ring 1 and the right cutting half-ring 2. The cutting blades 14 are triangular curved blades. When in use, the blade edge of the triangular curved blade can pierce the flange of the PE gas pipe along the circumference. At the same time, the flange of the PE gas pipe can be easily cut during the rotation of the triangular curved blade.

[0019] Limiting bosses 15 are provided on the inner sides of the left positioning half-ring 3 and the right positioning half-ring 4. The limiting bosses 15 are semi-circular rings. The cutting blade 14 and the limiting bosses 15 are staggered. When in use, the two limiting bosses 15 of the left positioning half-ring 3 and the right positioning half-ring 4 can be spliced ​​into a whole circle. The limiting bosses 15 can limit the outer circle of the flange. The left positioning half-ring 3 and the right positioning half-ring 4 can limit the end face of the flange. This ensures that the cut is flat and smooth when cutting the flange, and further ensures the flatness and consistency of the cut.

[0020] This edge-cutting device can be adapted to different sizes and specifications of PE gas pipes through size matching.

[0021] When using the edge-cutting device for PE gas pipes, firstly, the left cutting half-ring 1 and the right cutting half-ring 2, as well as the left positioning half-ring 3 and the right positioning half-ring 4, are opened around the pin 9. Then, they are fitted onto the flanged area of ​​the edge-cut PE gas pipe, so that the left cutting half-ring 1 and the right cutting half-ring 2 are located on one side of the flanged PE gas pipe, and the left positioning half-ring 3 and the right positioning half-ring 4 are located on the other side of the flanged PE gas pipe. Next, the flanged end face of the PE gas pipe contacts the left positioning half-ring 3 and the right positioning half-ring 4, and the inner side of the limiting boss 15 contacts the outer circle of the flanged PE gas pipe, thus limiting the flanged PE gas pipe.

[0022] Then, by cooperating with the first ear plate 7 and the first locking bolt 8, as well as the second ear plate 10 and the second locking bolt 11, one end of the left cutting half ring 1 and the right cutting half ring 2, and the left positioning half ring 3 and the right positioning half ring 4 are locked. After the above preparations are completed, the operator simultaneously rotates the locking nut 13 on the guide rod 12. The left positioning half ring 3 and the right positioning half ring 4 are limited by the flange of the PE gas pipe. Under the friction of the locking nut 13, the guide rod 12 generates a rightward pulling force. This pulling force acts on the left cutting half ring 1 and the right cutting half ring 2, causing the left cutting half ring 1 and the right cutting half ring 2 to move to the right. The tip of the cutting blade 14 on the left cutting half ring 1 and the right cutting half ring 2 pierces the flange until the tip of the cutting blade 14 contacts the end face of the left positioning half ring 3 and the right positioning half ring 4. Then, the operator holds the arc-shaped handle 6 to control the left cutting half ring 1 and the right cutting half ring 2, as well as the left positioning half ring 3 and the right positioning half ring 4 to rotate counterclockwise (see Appendix). Figure 1 At this time, the triangular curved blade rotates counterclockwise. During this rotation, the blade of the triangular curved blade cuts the PE gas pipe flange. The edge-cutting device can completely cut off the PE gas pipe flange without rotating a full circle. The cut PE gas pipe flange is ring-shaped. Afterwards, the staff only needs to cut the PE gas pipe flange with the blade to remove it. After the PE gas pipe flange is cut, the edge-cutting device can be disassembled by the first locking bolt 8 and the second locking bolt 11.

[0023] This edge-cutting device for PE gas pipes eliminates the need for a hand-operated reciprocating motion to drive a ratchet mechanism to move the edge cutter around the outer surface of the pipe for edge removal. It also solves the problems of incomplete edge removal and inconsistent edge flatness caused by manual recutting, which increases the risk of slow cracking in PE gas pipes and leads to pipe crack propagation and rupture.

Claims

1. A planing device for PE gas pipes, comprising a left cutting half-ring (1), a right cutting half-ring (2), a left positioning half-ring (3), and a right positioning half-ring (4), wherein the left cutting half-ring (1), the right cutting half-ring (2), the left positioning half-ring (3), and the right positioning half-ring (4) are each semi-circular rings, characterized in that: The left cutting half-ring (1) and the right cutting half-ring (2) are hinged at one end by a pin (9), and the other end of the left cutting half-ring (1) and the right cutting half-ring (2) are respectively provided with a first ear plate (7). The first ear plates (7) are detachably locked together by a first locking bolt (8); the left positioning half-ring (3) and the right positioning half-ring (4) are hinged at one end by a pin (9), and the other end of the left positioning half-ring (3) and the right positioning half-ring (4) are respectively provided with a second ear plate (10). The second ear plates (10) are detachably locked together by a second locking bolt (11); the left cutting half-ring (1) and the left positioning half-ring (3) are connected by a first guide assembly, and the right cutting half-ring (2) and the right positioning half-ring (4) are connected by a second guide assembly. Multiple cutting blades (14) are provided at intervals on the inner sides of the left cutting half ring (1) and the right cutting half ring (2), and limit bosses (15) are provided on the inner sides of the left positioning half ring (3) and the right positioning half ring (4).

2. The edge-planing device for PE gas pipes according to claim 1, characterized in that: The left cutting half ring (1), right cutting half ring (2), left positioning half ring (3) and right positioning half ring (4) are respectively equipped with arc-shaped throttles (6) via connecting rods (5) on their outer circles.

3. The edge-planing device for PE gas pipes according to claim 1, characterized in that: The first guide assembly and the second guide assembly respectively include a guide rod (12) and a locking nut (13). The guide rods (12) are symmetrically arranged. The left positioning half ring (3) and the right positioning half ring (4) corresponding to the guide rods (12) are provided with guide holes. Each guide rod (12) extends through the guide hole to the outside of the left positioning half ring (3) and the right positioning half ring (4). The locking nut (13) is threaded on the guide rod (12) extending to the outside of the left positioning half ring (3) and the right positioning half ring (4). The locking nut (13) is in contact with the left positioning half ring (3) and the right positioning half ring (4).

4. The edge-planing device for PE gas pipes according to claim 1, characterized in that: The cutting blade (14) and the limiting boss (15) are misaligned.

5. A planing device for PE gas pipes according to claim 1, characterized in that: The cutting blade (14) is a triangular curved blade.

6. The edge-planing device for PE gas pipes according to claim 1, characterized in that: The limiting boss (15) is a semi-circular ring.

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