Multifunctional plastic pipeline cutting device

Abstract

The utility model discloses a multifunctional plastic pipeline cutting device which comprises a fixing base, a cutting head, a cutting head and a cutting head. A rolling piece capable of rolling is arranged on the inner side wall of the arc-shaped part; the adjusting screw is vertically arranged in the sleeve, the movable lifting seat is in threaded fit with the adjusting screw and can move in the sleeve, the upper end of the movable lifting seat extends out of the sleeve, and a cutting tool bit is arranged at the bottom of the movable lifting seat. And the other end of the fixed chain is adjusted in length through a chain fixing structure and surrounds the outer wall of the plastic pipeline. According to the scheme, through the rigid-flexible composite fixing mode of the arc-shaped part and the chain, efficient adaptation of a single device to various pipe diameters is achieved, and the adjusting efficiency is obviously superior to that of a traditional clamp; and in combination with circumferential rotating cutting after vertical centering cutting-in of a tool nose, the flatness of a notch and the axis of the pipeline are kept at high vertical precision, and the problem of pipe orifice deformation caused by beveling is thoroughly solved.

Description

Technical Field

[0001] This utility model belongs to the field of pipe cutting technology, and in particular relates to a multifunctional plastic pipe cutting device. Background Technology

[0002] During the construction of plastic pipes, cutting devices are typically required to cut the pipes. However, existing cutting devices (such as band saws, cutting machines, or simple clamps with blades) have significant shortcomings: First, the fixing structure is often non-adjustable or has a limited adjustment range, making it difficult to adapt to pipes of different diameters, resulting in unstable fixing or cumbersome operation; second, after cutting, the pipe end usually needs to be chamfered separately, increasing the number of steps and time; third, the overall size and weight of the device are large, making it inconvenient to carry and store. These shortcomings affect construction efficiency and convenience, necessitating a plastic pipe cutting device that can flexibly adapt to various pipe diameters, integrates cutting and chamfering functions, and is easy to carry. Utility Model Content

[0003] (I) Purpose of the utility model

[0004] In order to overcome the above shortcomings, the purpose of this utility model is to provide a multifunctional plastic pipe cutting device to solve the technical problems of existing plastic pipe cutting devices, such as the fixed structure being difficult to adapt to different pipe diameters, the need for separate chamfering after cutting increasing the process time, and the large size and weight making them inconvenient to carry and store.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the technical solution provided in this application is as follows:

[0007] A multifunctional plastic pipe cutting device includes: a fixed base with a hollow sleeve at the upper end and an arc-shaped part at the lower end that matches the outer wall of the plastic pipe; a rolling element that is rotatably disposed on the inner side wall of the arc-shaped part; an adjusting screw that is rotatably disposed vertically in the sleeve, with its upper end extending out of the sleeve; a movable lifting seat that is movably disposed in the sleeve and threadedly engaged with the adjusting screw; a cutting head disposed at the bottom of the movable lifting seat; and a fixing chain with a first end connected to one side of the arc-shaped part and a second end being a free end, and a chain fixing structure that is movably disposed on the other side of the arc-shaped part, capable of fixing the other end of the fixing chain and adjusting the length of the fixing chain so that the fixing chain can be tightly wrapped around the outer wall of the plastic pipe.

[0008] This application achieves efficient adaptation of a single device to multiple pipe diameters through a rigid-flexible composite fixing method of the arc-shaped part and the chain, with adjustment efficiency significantly better than traditional clamps; combined with the circumferential rotation cutting after the blade tip makes a vertical centering cut, it ensures that the flatness of the cut is kept perpendicular to the pipe axis with high precision, completely solving the problem of pipe deformation caused by oblique cutting.

[0009] In some embodiments, a guide groove is vertically formed on the inner wall of the sleeve, and a guide block is formed by protruding outward on the side wall of the movable lifting seat, which is embedded in the guide groove and can slide along the guide groove.

[0010] By setting guide grooves and guide blocks, the movable lifting seat can be raised and lowered vertically, ensuring the directionality of the movable lifting seat's movement and improving the accuracy of cutting.

[0011] In some embodiments, the cutter head has a triangular structure, with the tip pointing vertically toward the central axis of the fixed position of the plastic pipe.

[0012] The triangular blade tip design concentrates stress and reduces cutting resistance. Its vertical alignment ensures that the cut is perpendicular to the pipe axis, avoiding pipe deformation caused by bevel cutting. Combined with the precision feed of the adjusting screw, it further reduces the risk of plastic pipe breakage and improves the flatness of the cut.

[0013] In some embodiments, a fixed wall with a first threaded hole is provided on the other side of the arc-shaped portion. The chain fixing structure includes: a movable bracket, a hook for hooking the fixed chain, and a second threaded hole corresponding to the first threaded hole. It also includes: an adjusting screw that passes through the first and second threaded holes and can rotate to drive the movable bracket to move.

[0014] The screw fine-tuning mechanism enables millimeter-level precise control of the chain length, is easy to operate and has reliable locking; the cooperative design of the movable bracket and hook prevents the chain from disengaging, significantly improving the efficiency of adapting to different pipe diameters, and is especially suitable for rapid pipe replacement operations on construction sites.

[0015] In some embodiments, the side of the cutter head protrudes outward at a predetermined distance from the lowest end of the cutter head to form a chamfering edge for chamfering the opening of the plastic pipe during the cutting process.

[0016] The chamfering blade simultaneously deburrs and chamfers the inner and outer edges of the pipe during the cutting stroke, eliminating secondary processing steps. The integrated design of the chamfering blade and the cutter head ensures consistent chamfering angles, improves pipe connection sealing, and fundamentally solves the efficiency loss problem caused by traditional step-by-step operations.

[0017] In some embodiments, the upper end of the adjusting screw is provided with a handle for driving the adjusting screw to rotate.

[0018] The handle provides leverage, reducing the torque required to rotate the adjusting screw and making it easier for the cutter head to cut into thick-walled pipes; the ergonomic grip design enhances operating comfort, making it especially suitable for long-term continuous operation scenarios. Attached Figure Description

[0019] Figure 1 This is a first-view structural schematic diagram of the multifunctional plastic pipe cutting device of this utility model;

[0020] Figure 2 This is a second-view structural schematic diagram of the multifunctional plastic pipe cutting device of this utility model;

[0021] Figure 3 This is a cross-sectional view of the multifunctional plastic pipe cutting device of this utility model.

[0022] Figure label:

[0023] 1. Arc-shaped part; 101. Fixed wall; 2. Sleeve; 3. Adjusting screw; 4. Movable lifting seat; 401. Guide block; 5. Cutting head; 6. Mounting bearing; 7. Handle; 8. Movable hanging seat; 9. Adjusting screw; 10. Rolling element; 11. Hook; 12. Chain; 1201. Pin. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0025] This utility model provides a multifunctional plastic pipe cutting device, comprising: a fixed base, which is integrally formed by casting, with an upper part being a hollow sleeve 2 and a lower part being an arc-shaped portion 1. Multiple rolling elements 10 are spaced and embedded in the inner wall of the arc-shaped portion 1. The rolling elements 10 can be rollers or bearings, preferably 304 stainless steel bearings, and are rotatably fixed to the inner side of the arc-shaped portion 1 by a pivot pin. An adjusting screw 3 is vertically installed inside the sleeve 2, and the adjusting screw 3 is rotatably fixed to the sleeve 2 by a mounting bearing 6. A movable lifting seat 4 is nested inside the sleeve 2, with its central threaded hole engaging with the adjusting screw 3, and the top of the adjusting screw 3 extending out of the end face of the sleeve 2. A cutting head 5 is fixed to the bottom of the movable lifting seat 4, and the cutting head 5 is preferably made of high-speed tool steel. The first end of the fixed chain 12 is welded to or connected to the right side of the arc-shaped section 1 via a pin 1201. The fixed chain 12 is a roller chain (to improve the smoothness of the overall rotation of the cutting device). The roller chain uses pins 1201 to rotate and fix multiple chain links, with both ends of the pins 1201 extending a predetermined length beyond the chain links. A fixed wall 101 and a chain fixing structure are provided on the left side of the arc-shaped section 1. This chain fixing structure includes a movable bracket 8 with two hooks 11 and adjusting screws 9 passing through threaded holes in the fixed wall 101 and the movable bracket 8. The pins 1201 at the end of the chain link can be hooked onto the two hooks 11. Rotating the adjusting screws 9 drives the movable bracket 8 to move laterally, thus adjusting the tension of the chain 12. In this way, the chain 12 can be locked around the outer wall of a Φ20-160mm plastic pipe.

[0026] Specifically, a guide groove is vertically opened on the inner wall of the sleeve 2, and a guide block 401 is provided on the side wall of the movable lifting seat 4. The guide block 401 protrudes outward and is embedded in the guide groove. When the adjusting screw 3 is rotated, it drives the movable lifting seat 4 to move up and down, and the guide block 401 moves up and down along the guide groove.

[0027] Specifically, the cutting head 5 has an equilateral triangular structure with blades formed on both sides. The blade tip angle can be selected as 60°±5°, and during installation, the blade tip points perpendicularly to the central axis of the pipe. Preferably, the surface of the cutting head 5 is titanium-plated to enhance wear resistance, and a detachable design is adopted between it and the movable lifting base 4 for easy replacement.

[0028] The following describes the process of cutting plastic pipes:

[0029] First, place the plastic pipe on the curved part 1, ensuring the rolling element 10 fits against the outer wall of the pipe. Wrap the free end of the fixed chain 12 around the pipe and hook it onto the hook 11 of the movable bracket 8. Rotate the adjusting screw 9 to push the movable bracket 8 laterally, tightening the chain 12 until the pipe is securely fixed. Then, rotate the handle 7 at the top of the adjusting screw 3 to drive the movable lifting seat 4 vertically downwards along the sleeve 2, causing the triangular cutting head 5 to vertically penetrate the pipe wall. Keep the device stable, hold the sleeve 2, and rotate the entire fixed seat around the pipe for one revolution, allowing the cutting head 5 to cut a complete cross-section along the pipe circumference.

[0030] Furthermore, the fixed wall 101 is welded to the left side of the arc-shaped portion 1, and its first threaded hole is an M6 standard threaded hole. The movable bracket 8 is provided with an L-shaped hook 11 and a second threaded hole, and the adjusting screw 9 is a fully threaded bolt, the shank of which simultaneously engages with the first and second threaded holes. It is worth noting that the movable bracket 8 slides laterally when the bolt is rotated.

[0031] Preferably, a chamfered edge inclined forward at 45° can be milled on the side of the cutter head 5, with a distance of approximately 8mm from the lowest point of the cutter head 5. When the cutter head 5 vertically penetrates the pipe wall, the chamfered edge also descends to the position of contact with the plastic pipe. At this point, as the device rotates, the chamfered edge simultaneously completes the chamfering and burr removal of the inner and outer edges of the pipe opening while cutting it. The entire process requires no tool change or secondary clamping, achieving both cutting and chamfering in one operation. Preferably, the surface of the chamfered edge is mirror-polished to reduce frictional resistance.

[0032] Preferably, an engineering plastic handle 7 is installed at the top of the adjusting screw 3 by hot pressing. The handle 7 extends outward by about 15cm, providing a lever amplification ratio of 1:4.

[0033] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A multifunctional plastic pipe cutting device, characterized in that, include: The fixed base has a hollow sleeve (2) at the upper end and an arc-shaped part (1) at the lower end that matches the outer wall of the plastic pipe. A rolling element (10) is rotatably set on the inner side wall of the arc-shaped part (1). An adjusting screw (3) is rotatably set vertically in the sleeve (2) and its upper end extends out of the sleeve (2). A movable lifting seat (4) is movably set in the sleeve (2) and threadedly engaged with the adjusting screw (3). A cutting head (5) is set at the bottom of the movable lifting seat (4). A fixed chain (12) has a first end connected to one side of the arc-shaped part (1) and a second end that is free. A chain fixing structure is movably set on the other side of the arc-shaped part (1) to fix the other end of the fixed chain (12) and adjust the length of the fixed chain (12) so that the fixed chain (12) can be tightly wrapped around the outer wall of the plastic pipe.

2. The multifunctional plastic pipe cutting device according to claim 1, characterized in that, The inner wall of the sleeve (2) is vertically provided with a guide groove, and the side wall of the movable lifting seat (4) protrudes outward to form a guide block (401) that is embedded in the guide groove and can slide along the guide groove.

3. The multifunctional plastic pipe cutting device according to claim 1, characterized in that, The cutter head (5) has a triangular structure, with the tip pointing vertically to the central axis of the fixed position of the plastic pipe.

4. The multifunctional plastic pipe cutting device according to claim 1, characterized in that, The arc-shaped part (1) is provided with a fixed wall (101) with a first threaded hole on the other side. The chain fixing structure includes: a movable bracket (8), a hook (11) for hooking the fixed chain (12), and a second threaded hole corresponding to the first threaded hole. It also includes: an adjusting screw (9) that passes through the first and second threaded holes and can drive the movable bracket (8) to move by rotation.

5. The multifunctional plastic pipe cutting device according to any one of claims 1-4, characterized in that, The side of the cutter head (5) protrudes outward at a predetermined distance from the bottom of the cutter head (5) to form a chamfering cutter for chamfering the opening of the plastic pipe during the cutting process.

6. The multifunctional plastic pipe cutting device according to any one of claims 1-4, characterized in that, The upper end of the adjusting screw (3) is provided with a handle (7) for driving the adjusting screw (3) to rotate.

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