Pentatricopeptide repeats (PPR) pipe scissors

Abstract

The utility model provides a pair of PPR pipe scissors, and belongs to the technical field of pipe machining tools. The technical problem that existing PPR pipe scissors are insufficient in machining efficiency is solved. The PPR pipe scissors comprise a scissor arm and a positioning supporting arm which are hinged to each other, an arc groove used for positioning a PPR pipe is formed in one end of the positioning supporting arm, a cutter opposite to the arc groove is arranged at one end of the scissor arm, a mounting frame arranged in the axial lead direction of the arc groove is further arranged on the part, close to the periphery of the arc groove, of the positioning supporting arm, and the cutter is arranged on the mounting frame. A groove hole capable of clamping a pen holder is formed in the mounting frame, and the groove hole is formed towards the side where the cutter is located. According to the PPR pipe scissors, the reserved welding length of the pipe end can be marked while cutting is conducted, manual marking in the later period is avoided, and the PPR pipe cutting and machining efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe processing tools and relates to a pair of PPR pipe scissors. Background Art

[0002] In the process of arranging PPR pipe lines, PPR scissors are necessary tools and play a very important role. Especially for small-diameter pipes, PPR scissors have their unique advantages, requiring less force, taking less time, and can cut continuously, which is convenient, fast, and safer. In the process of arranging lines, PPR pipes are usually hot-melt welded, so there may be over-welding or insufficient welding length, which will affect the subsequent installation and bring hidden dangers to the long-term use and safety of the pipeline.

[0003] The patent with authorization announcement number CN207189726U discloses a pair of PPR pipe scissors, comprising a left handle and a right handle hinged to each other, a groove formed at the front end of the left handle, a knife slot formed in the middle of the groove, and cushioning cotton filled inside the front end of the left handle; a protective piece is embedded in the knife slot; extension plates are respectively provided on the left and right sides of the groove, and anti-slip grooves are formed on the end faces of the extension plates; a blade is formed at the front end of the right handle.

[0004] The above-mentioned scissors can effectively cut the PPR pipe, but after cutting, the PPR pipe end needs to be marked to indicate the reserved welding length, and the processing efficiency is insufficient. Summary of the invention

[0005] The utility model aims at the above-mentioned problems existing in the prior art and provides a PPR pipe scissors. The technical problem to be solved by the utility model is to improve the efficiency of PPR pipe cutting and processing.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A pair of PPR pipe scissors, comprising a hinged knife arm and a positioning support arm, one end of the positioning support arm having an arc groove for positioning the PPR pipe, and one end of the knife arm having a cutting knife opposite to the arc groove. The present invention is characterized in that the positioning support arm near the periphery of the arc groove also has a mounting frame arranged along the axial centerline direction of the arc groove, the mounting frame has a slot hole capable of clamping a pen holder, and the slot hole is opened toward the side where the cutting knife is located.

[0008] The circular arc groove on the positioning support arm can accommodate the PPR tube inside to provide support, and the cutter on the knife arm is used to cut into the surface of the PPR tube held in the circular arc groove. When cutting, the knife arm is clamped and the entire scissors are rotated one circle relative to the PPR to achieve cutting; by providing a mounting frame arranged along the extension direction of the circular arc groove on the positioning support arm near the periphery of the circular arc groove, and providing a slot hole for clamping the pen holder on the mounting frame, the slot hole clamping method can be achieved through existing methods, so that the slot hole is opened toward the side where the cutter is located, so that the mounting frame extends a certain distance to the side, which is conducive to the design so that the distance between the center of the slot hole and the cutter is equivalent to the size reserved for welding of the PPR tube, so that the slot hole is closer to the PPR tube, and the marking pen positioned and clamped in the slot hole can mark the reserved welding length of the pipe end while the PPR tube is rotating and cutting, avoiding manual marking in the later stage, thereby improving the efficiency of PPR tube cutting and processing.

[0009] In the above-mentioned PPR pipe scissors, the mounting frame has at least two slots, which are arranged on both sides of the cutter and have the same spacing size as the cutter along the axial centerline of the arc groove. In this way, no matter which direction the PPR pipe is cut from, the marking effect can be achieved, which improves convenience and efficiency.

[0010] In the above-mentioned PPR pipe scissors, the mounting frame is columnar, and the end of the mounting frame away from the cutter has a plurality of slots arranged at intervals along the mounting frame setting direction. In this way, the marking pen can be positioned in different slots for different reserved lengths of PPR pipes, thereby improving applicability.

[0011] In the above-mentioned PPR pipe scissors, an adjusting screw is threadedly inserted on the mounting frame and is perpendicular to the axial direction of the slot hole, and the inner end of the adjusting screw is located in the slot hole. As a solution, the marking pen can be locked and unlocked by rotating the adjusting screw, which is convenient and reliable to operate. Of course, the marking pen can also be locked by other means such as tight fit.

[0012] In the above-mentioned PPR pipe scissors, the adjusting screws at the adjacent slots are respectively located on both sides of the mounting frame, which helps to reduce the probability of operation interference when locking and unlocking the marking pen, and improves the convenience of operation.

[0013] In the above-mentioned PPR pipe scissors, the slot hole is opened along the radial direction of the arc slot, which is conducive to arranging the marking pen in the slot hole toward the PPR pipe, thereby reducing the contact wear between the pen core and the PPR pipe.

[0014] Compared with the prior art, the advantages of the utility model are as follows:

[0015] The PPR pipe scissors are equipped with a mounting frame that extends a certain distance to the side, which is conducive to the design so that the distance between the center of the slot and the cutter is equivalent to the reserved size of the PPR pipe welding. In this way, the marking pen positioned and clamped in the slot can mark the reserved welding length of the pipe end while the PPR pipe is rotating and cutting, eliminating the need for manual marking in the later stage and improving the efficiency of PPR pipe cutting and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of this embodiment.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the clamping marking pen state of this embodiment.

[0018] In the figure, 1, knife arm; 11, cutting knife;

[0019] 2. Positioning support arm; 21. Arc groove; 22. Mounting frame; 221. Slot hole; 222. Adjusting screw. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] like Figure 1 , Figure 2As shown, this type of PPR pipe scissors includes a hinged knife arm 1 and a positioning support arm 2, one end of the positioning support arm 2 has an arc groove 21 for positioning the PPR pipe, one end of the knife arm 1 has a cutter 11 opposite to the arc groove 21, and the positioning support arm 2 near the outer periphery of the arc groove 21 also has a mounting frame 22 arranged along the axial centerline direction of the arc groove 21, the mounting frame 22 has a slot hole 221 that can clamp the pen holder, and the slot hole 221 is opened toward the side where the cutter 11 is located. The circular arc groove 21 on the positioning support arm 2 can accommodate the PPR pipe inside to provide support, and the cutter 11 on the knife arm 1 is used to cut into the surface of the PPR pipe held in the circular arc groove 21. When cutting, the knife arm 1 is clamped and the entire scissors are rotated relative to the PPR for one circle to achieve cutting; by providing a mounting frame 22 arranged in the extension direction of the circular arc groove 21 on the positioning support arm 2, and providing a slot hole 221 that can clamp the pen holder on the mounting frame 22, the clamping method of the slot hole 221 can be achieved through the existing method, so that the slot hole 221 is opened on the side where the cutter 11 is located, so that the mounting frame 22 extends to the side for a certain distance, which is conducive to the design so that the distance between the center of the slot hole 221 and the cutter 11 is equivalent to the size reserved for welding of the PPR pipe. The marking pen positioned and clamped in the slot hole 221 can mark the reserved welding length of the pipe end while the PPR pipe is rotating and cutting, avoiding manual marking in the later stage, thereby improving the efficiency of PPR pipe cutting and processing. Specifically, the mounting frame 22 has four slots 221, and the four slots 221 are symmetrically arranged on both sides of the cutter 11. In this way, no matter from which direction the PPR pipe is cut, the marking effect can be achieved, which improves convenience and efficiency. The mounting frame 22 is columnar, and the two slots 221 located on the same side of the cutter 11 are arranged at intervals along the setting direction of the mounting frame 22. In this way, for different reserved length requirements, the marking pen can be positioned in different slots 221, thereby improving applicability. The mounting frame 22 is threadedly provided with an adjustment screw 222 that is axially perpendicular to the slot 221, and the inner end of the adjustment screw 222 is located in the slot 221. In this way, the marking pen can be locked and unlocked by rotating the adjustment screw 222, and the operation is convenient and reliable. The adjustment screws 222 at adjacent slots 221 are respectively located on both sides of the width direction of the mounting frame 22. This helps to reduce the probability of operation interference when locking and unlocking the marking pen, thereby improving the convenience of operation. The slot 221 is opened along the radial direction of the arc groove 21. This helps to arrange the marking pen in the slot 221 toward the PPR tube, thereby reducing the contact wear between the pen core and the PPR tube.

[0022] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A PPR pipe scissors, comprising a knife arm (1) and a positioning support arm (2) which are hinged to each other, wherein one end of the positioning support arm (2) has a circular arc groove (21) for positioning the PPR pipe, and one end of the knife arm (1) has a cutting knife (11) opposite to the circular arc groove (21), characterized in that: The positioning support arm (2) near the periphery of the circular arc groove (21) also has a mounting frame (22) arranged along the axial centerline direction of the circular arc groove (21), and the mounting frame (22) has a slot hole (221) capable of clamping a pen holder, and the slot hole (221) is opened toward the side where the cutter (11) is located.

2. The PPR pipe scissors according to claim 1, characterized in that: The mounting frame (22) has at least two slot holes (221), and the two slot holes (221) are respectively arranged on two sides of the cutter (11) and have the same spacing dimension as the cutter (11) along the axial centerline direction of the circular arc groove (21).

3. The PPR pipe scissors according to claim 1, characterized in that: The mounting frame (22) is columnar, and the end of the mounting frame (22) on the side away from the cutter (11) has a plurality of slots (221) arranged at intervals along the direction in which the mounting frame (22) is set.

4. The PPR pipe scissors according to claim 1 or 2, characterized in that: An adjusting screw (222) is threadedly inserted on the mounting frame (22) and is axially perpendicular to the slot hole (221), and the inner end of the adjusting screw (222) is located in the slot hole (221).

5. The PPR pipe scissors according to claim 4, characterized in that: The adjusting screws (222) adjacent to the slotted holes (221) are respectively located on two sides of the mounting frame (22).

6. The PPR pipe scissors according to claim 1 or 2, characterized in that: The slot hole (221) is opened along the radial direction of the circular arc slot (21).

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