Tapping cutter for metal pipeline

Abstract

The utility model discloses a trepanning cutter for a metal pipeline. The trepanning cutter comprises a cutter cylinder, a plurality of cutter tooth positions are arranged at the bottom of the cutter cylinder, notches are formed in the cutter tooth positions, blades are detachably installed on the notches, pressing plates are detachably installed on the cutter tooth positions, and one ends of the pressing plates are fixed to the outer sides of the tops of the blades in an extruding mode. The blade of the cutter can be independently replaced, the cutter cylinder can be repeatedly used, and the use cost is low.

Description

Technical Field

[0001] This utility model relates to the technical field of pipe drilling equipment, specifically to a drilling knife for metal pipes. Background Technology

[0002] In the process of repairing, rerouting, and adding branch lines to existing pipelines, the pipeline is often constructed without interrupting service to users along the line. This method requires welding pipe fittings onto the pipeline, then installing gate valves, hole drills, and other equipment on these fittings to complete the repair, rerouting, or branch line addition. Pipeline repair, rerouting, and branch line addition require drilling into the pipeline, which is done using a hole drill that rotates the cutting tool. Existing hole drills are typically made by welding high-strength alloy heads onto the cutting teeth of a cutter barrel, resulting in low overall cost. However, because of the welding method, the strength of the cutting head is reduced due to the materials of the cutting head and barrel, as well as the welding process. Furthermore, the repair cost is high or even irreparable when individual cutting teeth are damaged, increasing the overall operating cost. Utility Model Content

[0003] The purpose of this invention is to provide a hole-opening knife for metal pipes. The blade can be replaced separately, the knife barrel can be reused, and the operating cost is low.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A hole opener for metal pipes includes a cutter barrel with multiple tooth positions at the bottom of the cutter barrel, a groove on each tooth position, a blade detachably mounted on the groove, and a pressure plate detachably mounted on each tooth position, one end of the pressure plate being pressed and fixed to the top outer side of the blade.

[0006] Preferably, the plurality of the cutting teeth positions are evenly arranged along the circumference of the cutting cylinder.

[0007] Preferably, the cutting edge is arc-shaped.

[0008] Preferably, multiple weight-reduction holes are provided on the top and / or sidewall of the cutter barrel.

[0009] Preferably, a positioning boss is provided on the top of the cutter barrel, and multiple connecting holes are provided on the positioning boss.

[0010] Preferably, a positioning hole is provided on the cutting tooth position, and a positioning protrusion is provided on the back of the pressure plate, wherein the positioning protrusion is disposed in the positioning hole.

[0011] Preferably, the pressure plate is detachably mounted on the cutting tooth position by fastening screws. Marking positions are provided on both the pressure plate and the fastening screws. When the fastening screws fix the pressure plate to the cutting tooth position, the positions of the two marking positions correspond to each other.

[0012] Preferably, the slot includes a mounting part and a positioning part, and the blade is mounted on the mounting part and its position is defined by the positioning part.

[0013] In this invention, the blade and the blade cylinder are connected in a detachable manner. When a single blade is damaged, it can be replaced individually, making operation simple, convenient, and with low maintenance costs. The weight-reducing holes reduce the weight of the blade cylinder and facilitate the removal of the material block after drilling, thus simplifying the drilling operation. The marking positions allow operators to easily check whether the fastening screws are loose, providing strong visual guidance. The positioning holes and positioning protrusions ensure the stability of the pressure plate and facilitate loading and unloading. The positioning part allows for quick positioning of the blade, improving the convenience and consistency of installation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0016] Figure 3 This is an enlarged schematic diagram of a portion of the blade barrel structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the pressure plate structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the fastening screw structure of this utility model;

[0019] In the diagram: 1. Cutter barrel; 2. Cutter tooth position; 3. Groove; 4. Blade; 5. Pressure plate; 6. Weight reduction hole; 7. Positioning boss; 8. Connecting hole; 9. Positioning hole; 10. Positioning protrusion; 11. Fastening screw; 12. Marking position; 30. Mounting part; 31. Positioning part. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] like Figures 1 to 5 The illustrated metal pipe punch includes a punch cylinder 1, which is a cylindrical structure with an open bottom. Multiple weight-reducing holes 6 are provided on the top and / or side walls of the punch cylinder 1. These weight-reducing holes 6 can be circular, elliptical, oblong, or other shapes. A positioning boss 7 is integrally formed at the center of the top of the punch cylinder 1, and multiple connecting holes 8 are provided on the positioning boss 7. During use, the positioning boss 7 and the connecting holes 8 are connected to a rotary drive component, driving the punch cylinder 1 to rotate and perform the punching operation. The weight-reducing holes 6 reduce the weight of the punch cylinder 1 and facilitate the removal of material blocks produced after punching.

[0022] Multiple cutting tooth positions 2 are provided at the bottom of the cutter barrel 1. The multiple cutting tooth positions 2 are evenly arranged along the circumference of the cutter barrel. The cutting tooth positions 2 are arc-shaped. In this embodiment, a total of six cutting tooth positions 2 are provided. Of course, three, four, five, seven, eight, twelve or other numbers can also be provided.

[0023] A slot 3 is provided on the tooth position 2, and the blade 4 can be detachably installed on the slot 3. Specifically, the slot 3 includes a mounting part 30 and a positioning part 31. The blade 4 is installed on the mounting part 30 and its position is limited by the positioning part 31, so as to realize the quick and accurate installation of the blade 4.

[0024] A pressure plate 5 is detachably installed on the cutting tooth position 2, with one end of the pressure plate 5 pressed and fixed to the top outer side of the blade 4. A positioning hole 9 is provided on the cutting tooth position 2, and a positioning protrusion 10 is fixedly provided on the back of the pressure plate 5. When the pressure plate 5 is installed on the cutting tooth position 2, the positioning protrusion 10 is positioned within the positioning hole 9. To further improve the ease of installation of the pressure plate 5, the end of the positioning protrusion 10 is tapered.

[0025] The pressure plate 5 is detachably mounted on the blade tooth position 2 by fastening screws 11. Marking positions 12 are provided on both the pressure plate 5 and the fastening screws 11. When the fastening screws 11 fix the pressure plate 5 on the blade tooth position 2, the two marking positions 12 correspond to each other after the fastening screws 11 are tightened to the correct position. When the fastening screws 11 are loosened, the two marking positions 12 are misaligned, which can be visually observed by the operator and can be quickly tightened and fixed.

[0026] The above embodiments are merely illustrative of the concept and implementation of this utility model, and are not intended to limit it. Under the concept of this utility model, the technical solutions without substantial changes are still within the scope of protection.

Claims

1. A knock-over tool for metal pipes comprising a tool barrel, characterized in that: A plurality of cutter tooth positions are arranged at the bottom of the cutter barrel, a notch is arranged at the cutter tooth position, a cutter blade is detachably mounted on the notch, and a pressing plate is detachably mounted on the cutter tooth position, one end of the pressing plate being extruded and fixed to the top outside of the cutter blade.

2. The hole cutter for metal pipes according to claim 1, characterized by: The plurality of cutter tooth positions are evenly arranged along the circumference of the cutter barrel.

3. The hole cutter for metal pipes according to claim 2, characterized by: The cutter tooth position is in an arc shape.

4. The hole cutter for metal pipes according to claim 1 or 3, characterized in that: A plurality of weight-reducing holes are arranged at the top and / or sidewall of the cutter barrel.

5. The hole cutter for metal pipes according to claim 1, characterized by: A positioning boss is arranged at the top of the cutter barrel, and a plurality of connecting holes are arranged on the positioning boss.

6. The hole cutter for metal pipes according to claim 1 or 5, characterized in that: A positioning hole is arranged on the cutter tooth position, and a positioning protrusion is arranged on the back of the pressing plate, the positioning protrusion being arranged in the positioning hole.

7. The hole cutter for metal pipes according to claim 1, 2, 3 or 5, characterized in that: The pressing plate is detachably mounted on the cutter tooth position through a fastening screw, and an identification position is arranged on the pressing plate and the fastening screw, the positions of the two identification positions corresponding when the fastening screw fixes the pressing plate on the cutter tooth position.

8. The hole cutter for metal pipes according to claim 7, characterized in that: The notch comprises a mounting portion and a positioning portion, the cutter blade being mounted on the mounting portion and the position being limited by the positioning portion.

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