Portable PE pipe cutting tool

Abstract

The utility model discloses a portable PE pipe cutting tool which comprises an arch-shaped arm, a positioning supporting roller for supporting a pipe is arranged on the inner side of the bottom of the arch-shaped arm, a fixed sleeve is fixedly connected to the upper end of the arch-shaped arm, a movable frame is movably inserted into the fixed sleeve, and a spring buckle movably connected to the movable frame in a clamped mode is installed on the fixed sleeve. An adjusting screw is rotationally connected into the movable frame, the upper end of the adjusting screw extends out of the movable frame and is fixedly connected with a rotating handle, the lower end of the adjusting screw is in threaded connection with a tool apron movably inserted into the bottom of the movable frame, a circular knife is installed at the bottom of the tool apron, and a fixing frame is fixedly installed on the surface of the tool apron. The two sides of the bottom of the fixing frame are movably connected with roller frames through spring telescopic rods, and positioning pressing rollers supported on the two sides of the top of the pipe are installed on the roller frames. According to the utility model, the PE pipe is positioned at multiple angles, so that the positioning and guiding effects in the cutting process of the PE pipe are comprehensively improved, and the cutting precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nozzle cutting, in particular to a portable PE pipe cutting tool. Background Art

[0002] When laying PE pipes for water supply, pipe fittings were initially used to connect the pipes. However, due to the aging and leakage of fittings, subsequent maintenance was difficult. When hot-melt welding was introduced, this problem was solved, and hot-melt welding was then widely used for connecting PE water supply pipes. Since the pipes vary in length, in order to meet the laying requirements, PE pipe cutting tools are needed to temporarily cut the pipes at the construction site to accommodate the ever-changing laying conditions.

[0003] Existing portable telescopic PE pipe cutters differ in structure, but their basic principles are similar. They consist of a roller supported below the PE pipe and a circular blade above it. The portable telescopic PE pipe cutter rotates around the PE pipe, causing the circular blade to cut the surface of the pipe. Repeated cutting increases the pressure between the circular blade and the pipe, resulting in severance. Existing portable telescopic PE pipe cutters only use the roller below to guide the PE pipe during cutting. Due to inaccurate positioning and insufficient guidance accuracy, the cut section of slightly thicker PE pipes may not be perpendicular to the axis, affecting subsequent connection with adjacent PE pipes and, in turn, the effectiveness of hot-melt welding. Therefore, improvements are being sought. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a portable PE pipe cutting tool, which is used to solve the problem that the existing portable PE pipe telescopic cutter has the problem that the cutting section of slightly thicker PE pipes is not perpendicular to the axis, which affects the subsequent docking with adjacent PE pipes.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A portable PE pipe cutting tool comprises a bow-shaped arm, a positioning support roller for supporting the pipe is provided on the inner side of the bottom of the bow-shaped arm, the upper end of the bow-shaped arm is fixedly connected to a fixed sleeve, a movable frame is movably inserted in the fixed sleeve, a spring buckle that is movably clamped on the movable frame is installed on the fixed sleeve, an adjusting screw is rotatably connected to the inside of the movable frame, the upper end of the adjusting screw extends to the outside of the movable frame and is fixedly connected to the rotating handle, the lower end of the adjusting screw is threadedly connected to a knife holder movably inserted at the bottom of the movable frame, a circular knife is installed at the bottom of the knife holder, a fixed frame is fixedly installed on the surface of the knife holder, both sides of the bottom of the fixed frame are movably connected to a roller frame through a spring telescopic rod, and the roller frame is equipped with positioning pressure rollers supported on both sides of the top of the pipe.

[0007] Preferably, there are two groups of positioning support rollers, four in total, and the two groups of positioning support rollers include two high-position thick tube support rollers and two low-position thin tube support rollers.

[0008] Preferably, the positioning pressure roller and the positioning support roller are parallel to the axis of the pipe, the circular knife is perpendicular to the axis of the pipe, and the circular knife is arranged in the mid-vertical plane of the positioning pressure roller and the positioning support roller.

[0009] Preferably, the movable frame is provided with a clamping groove for movably engaging with the spring buckle, and the clamping groove is equidistantly arranged along the axial direction on the side surface of the movable frame.

[0010] Preferably, the fixed sleeve, movable frame and knife seat are square tubes with mutually adapted shapes and sizes.

[0011] Preferably, there are four spring telescopic rods and they are symmetrical front to back and left to right with the circular knife as the center.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The utility model respectively arranges positioning pressure rollers and positioning support rollers for positioning and guiding above and below the PE pipe; the positioning pressure rollers can automatically extend and retract under the action of a spring telescopic rod; the positioning support rollers are also divided into two groups of different heights to adapt to PE pipes of different diameters; the positioning pressure rollers and the positioning support rollers are both parallel to the axis of the PE pipe, and the circular knife is perpendicular to the axis of the PE pipe. By positioning the PE pipe at multiple angles, the positioning and guiding effects in the PE pipe cutting process are comprehensively improved, and the cutting accuracy is improved, thereby solving the problem of the existing portable PE pipe telescopic cutter that, for slightly thicker PE pipes, the cutting cross section is not perpendicular to the axis, which affects the subsequent docking with adjacent PE pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Fig. 1 This is a front view of the overall structure of the utility model;

[0015] Fig. 2 This is a right view of the local structure at the corresponding position of the movable frame of the utility model;

[0016] Fig. 3 This is a front view of the local structure of the bow-shaped arm and the pipe at corresponding positions of the utility model.

[0017] In the figure: 1. bow arm; 2. pipe; 3. positioning support roller; 301. thick pipe support roller; 302. thin pipe support roller; 4. fixed sleeve; 5. movable frame; 501. slot; 6. spring buckle; 7. adjusting screw; 8. rotating handle; 9. knife holder; 10. circular knife; 11. fixed frame; 12. spring telescopic rod; 13. roller frame; 14. positioning pressure roller. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] like Figs. 1-3 As shown, the utility model provides a technical solution: a portable PE pipe cutting tool, including a bow-shaped arm 1, and a positioning support roller 3 for supporting the pipe 2 is provided on the inner side of the bottom of the bow-shaped arm 1. There are two groups of positioning support rollers 3, a total of four. The two groups of positioning support rollers 3 include two high-position thick pipe support rollers 301 and two low-position thin pipe support rollers 302, which can be used to support pipes 2 of different diameters for auxiliary cutting, and have strong practicality.

[0020] The upper end of the bow arm 1 is fixedly connected to a fixed sleeve 4, and a movable frame 5 is movably inserted in the fixed sleeve 4. A spring clip 6 that is movably engaged with the movable frame 5 is installed on the fixed sleeve 4. The movable frame 5 is provided with a slot 501 that is movably engaged with the spring clip 6. The slots 501 are equidistantly arranged axially on the side of the movable frame 5 for positioning the movable frame 5.

[0021] The interior of the movable frame 5 is rotatably connected to an adjusting screw 7, the upper end of the adjusting screw 7 extends to the outside of the movable frame 5 and is fixedly connected to the rotating handle 8, the lower end of the adjusting screw 7 is threadedly connected to a knife holder 9 movably inserted at the bottom of the movable frame 5, a circular knife 10 is installed at the bottom of the knife holder 9, a fixing frame 11 is fixedly installed on the surface of the knife holder 9, and roller frames 13 are movably connected to both sides of the bottom of the fixing frame 11 through spring telescopic rods 12.

[0022] The fixed sleeve 4, movable frame 5 and knife seat 9 are square tubes with mutually adapted shapes and sizes, so that the circular groove 10 is always perpendicular to the pipe 2. There are four spring telescopic rods 12 and they are symmetrical front to back and left to right with the circular knife 10 as the center. The positioning pressure roller 14 is always parallel to the pipe 2 for support.

[0023] The roller frame 13 is equipped with positioning rollers 14 supported on both sides of the top of the pipe 2. The positioning roller 14 and the positioning support roller 3 are parallel to the axis of the pipe 2. The circular knife 10 is perpendicular to the axis of the pipe 2, and the circular knife 10 is set in the mid-vertical plane of the positioning roller 14 and the positioning support roller 3. The positioning of the pipe 2 is relatively accurate, ensuring that the cut section of the pipe 2 is perpendicular to the axis, which is convenient for subsequent docking with adjacent pipes 2.

[0024] Working principle:

[0025] Put the bow arm 1 on the pipe 2, support it at the bottom of the pipe 2 through the positioning support roller 3, press the spring buckle 6 and push the movable frame 5 downward, so that the circular knife 10 is against the top of the pipe 2, release the spring buckle 6 to clamp the movable frame 5 to position it, and the spring telescopic rod 12 can elastically expand and contract, so that the positioning pressure roller 14 is pressed on the top of the pipe 2, so that the positioning support roller 3 and the positioning pressure roller 14 are both in contact with the surface of the pipe 2, thus ensuring that the positioning pressure roller 14 and the positioning support roller 3 are parallel to the axis of the pipe 2, and the circular knife 10 is perpendicular to the axis of the pipe 2;

[0026] By turning the rotary handle 8, the knife holder 9 is driven downward by adjusting the screw 7 to increase the pressure between the circular knife 10 and the pipe 2. The bow arm 1 is rotated around the pipe 2, and the circular knife 10 cuts circumferentially on the surface of the pipe 2. The rotary handle 8 is gradually turned to increase the pressure of the circular knife 10. Repeated cutting can cut the pipe 2. Press the spring buckle 6 and move the movable frame 5 upward to remove the portable PE pipe cutting tool.

Claims

1. A portable PE pipe cutting tool, comprising a bow-shaped arm (1), characterized in that: A positioning support roller (3) for supporting the pipe (2) is provided on the inner side of the bottom of the bow-shaped arm (1); a fixed sleeve (4) is fixedly connected to the upper end of the bow-shaped arm (1); a movable frame (5) is movably inserted into the fixed sleeve (4); a spring clip (6) movably connected to the movable frame (5) is installed on the fixed sleeve (4); an adjusting screw (7) is rotatably connected to the inside of the movable frame (5); the upper end of the adjusting screw (7) extends to the outside of the movable frame (5) and The adjusting screw rod (7) is fixedly connected to the rotating handle (8), and the lower end of the adjusting screw rod (7) is threadedly connected to the knife seat (9) movably inserted at the bottom of the movable frame (5). A circular knife (10) is installed at the bottom of the knife seat (9). A fixed frame (11) is fixedly installed on the surface of the knife seat (9). Both sides of the bottom of the fixed frame (11) are movably connected to roller frames (13) through spring telescopic rods (12). Positioning pressure rollers (14) supported on both sides of the top of the pipe (2) are installed on the roller frame (13).

2. A portable PE pipe cutting tool according to claim 1, characterized in that: There are two groups of positioning support rollers (3), four in total. The two groups of positioning support rollers (3) include two high-position thick tube support rollers (301) and two low-position thin tube support rollers (302).

3. The portable PE pipe cutting tool according to claim 1, characterized in that: The positioning pressure roller (14) and the positioning support roller (3) are both parallel to the axis of the pipe (2), the circular knife (10) is perpendicular to the axis of the pipe (2), and the circular knife (10) is arranged in the mid-vertical plane of the positioning pressure roller (14) and the positioning support roller (3).

4. The portable PE pipe cutting tool according to claim 1, characterized in that: The movable frame (5) is provided with a clamping groove (501) that is movably clamped with the spring clamp (6), and the clamping groove (501) is arranged at equal distances along the axial direction on the side surface of the movable frame (5).

5. The portable PE pipe cutting tool according to claim 1, characterized in that: The fixed sleeve (4), the movable frame (5) and the knife seat (9) are square tubes with mutually adapted shapes and sizes.

6. The portable PE pipe cutting tool according to claim 1, characterized in that: There are four spring telescopic rods (12) which are symmetrical front to back and left to right with the circular knife (10) as the center.

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