PVC plastic sewer pipe cutting machine
By employing a dual-blade design and a step-by-step cutting principle, the problems of blade wear and poor cutting quality during the cutting of multi-layer PVC plastic drain pipes have been solved, resulting in extended blade life, increased cutting speed, and improved cutting accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-16
- Publication Date
- 2026-04-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When cutting multi-layer PVC plastic drain pipes, the cutting tool comes into contact with the outer high-strength material, causing severe wear, reducing tool life, and resulting in poor cutting quality.
The device employs a dual-blade design, with inner and outer cutting blades cutting the inner and outer layers of the pipe in stages. The moving and transmission components work together to ensure a smooth inner cut surface, reducing wear. Dust is removed by cleaning iron plates and flexible contact plates, improving cutting accuracy and speed.
It extends the service life of the cutting tools, improves cutting speed and quality, ensures the smoothness and precision of the cut, reduces dust interference, and lowers the frequency of equipment maintenance.
Smart Images
Figure CN121848458A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of pipe cutting, specifically a PVC plastic drain pipe cutting machine. Background Technology
[0002] A cutting machine is a machine used to cut materials into the required size or shape. It cuts pipes by driving the blades to rotate at high speed.
[0003] When cutting pipes, cutting machines use different types of blades depending on the material being cut. For example, blades with sharp edges are used to cut PVC pipes, while blades with specific cutting angles and geometric shapes are typically used when cutting harder materials. Some pipes use multi-layered structures to achieve appropriate corrosion resistance and pressure resistance, consisting of inner and outer layers. The inner layer is usually made of PVC, while the outer layer often uses reinforcing materials such as fiber mesh, wire mesh, or polyester fiber to increase the pipe's pressure resistance and impact resistance. When cutting multi-layered pipes… If a cutting tool with a specific cutting angle and geometry is used, it can easily cut the outer layer of fiber mesh and wire mesh. However, when cutting the inner layer, because the cutting tool is not sharp and is incompatible with the PVC material of the inner layer of the pipe, it can cause uneven cuts and damage to the inner PVC pipe. Therefore, when cutting this type of pipe, a cutting tool that matches the PVC pipe is used. However, this type of tool is only suitable for cutting the inner layer. When cutting the outer layer, the high hardness of the outer layer material causes the tool to wear down significantly, greatly reducing its lifespan.
[0004] Therefore, a PVC plastic drain pipe cutting machine is proposed. Summary of the Invention
[0005] The purpose of this invention is to provide a PVC plastic drain pipe cutting machine to solve the problem of excessive wear on the cutting tool caused by contact between the cutting tool and the high-strength outer layer of the pipe when cutting multi-layer pipes, which leads to a reduction in the cutting tool's lifespan. This invention uses various types of blades to cut multi-layer pipes, employing a step-by-step cutting principle to cut each layer of the multi-layer pipe sequentially. Specifically, when cutting multiple pipe sections, a moving component drives one side of the cutting tool to cut the outer layer of the multi-layer pipe while simultaneously moving the other side to cut the inner layer of the pipe after the outer layer has been cut. This ensures a smooth cut surface on the inner layer of the multi-layer pipe while avoiding unnecessary wear on the cutting tool, thus guaranteeing its lifespan.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A PVC plastic drain pipe cutting machine includes a mounting frame with a cutting blade mounted on it. A drive motor is connected to each cutting blade to drive its rotation. Two cutting blades are provided: an inner cutting blade and an outer cutting blade. Multiple stabilizing slide rods are fixedly mounted on the mounting frame, and multiple supporting slide plates are slidably connected to the stabilizing slide rods. A prism drive rod is rotatably connected between two supporting slide plates on one side. The inner cutting blade is slidably mounted on the prism drive rod, and the outer cutting blade is mounted on two supporting slide plates on the other side. The axial distance between the inner and outer cutting blades is equal to the length of the pipe to be cut. A moving assembly connected to the two supporting slide plates is mounted on the mounting frame. The moving assembly drives the inner and outer cutting blades to cut the inner and outer layers of the pipe, respectively. Simultaneously, the moving assembly fixes the pipe during operation. A transmission assembly connecting the output shaft of the drive motor and the cutting blades is mounted on the supporting slide plates. The transmission assembly drives the inner and outer cutting blades to rotate simultaneously.
[0008] By using two different types of cutting tools to cut pipes, a single part can be cut quickly when the two tools are on a horizontal plane. Of course, the position between the two tools can also be adjusted to cut multiple sections of pipe of the same length. This allows the cutting equipment to cut the inner and outer walls of the pipe simultaneously, thus increasing the cutting speed.
[0009] The transmission assembly includes a connecting plate, a prism telescopic rod, a first transmission belt, a bevel gear set, a second transmission belt, a first spring telescopic rod, and a rubber anti-slip block. A prism telescopic rod is provided on one side of the stabilizing slide rod. Multiple connecting plates are rotatably connected to the prism telescopic rod, and the connecting plates are fixedly installed on the stabilizing slide rod. A rotating rod is rotatably connected to the supporting slide plate. A bevel gear set is installed between the rotating rod and the movable end of the prism telescopic rod. A protective box is provided outside the bevel gear set, and the protective box is fixedly installed on the supporting slide plate. First transmission belts are provided on both sides of the supporting slide plate. The first transmission belt on one side is installed between the rotating rod and the outer cutting tool shaft, and the first transmission belt on the other side is installed between the rotating rod and the prism telescopic rod shaft. The length of the fixed end of the prism telescopic rod is greater than the sum of the lengths of the movable ends on both sides of the prism telescopic rod. A second transmission belt is installed between the drive motor and the fixed end of the prism telescopic rod. Multiple circumferentially distributed circular holes are opened at both ends of the fixed rod of the prism telescopic rod, and these circular holes communicate with the interior of the prism telescopic rod.
[0010] When the motor operates, its output shaft drives the lower prism telescopic rod to rotate via the second transmission belt. The rotating prism telescopic rod's movable end drives the bevel gear set inside the protective box. One of the bevel gear shafts drives the lower cutting blade to rotate via the first transmission belt, cutting the pipe placed in the middle. Simultaneously, because the cutting blade is connected to the drive motor through the prism telescopic rod, the cutting blades on both sides can still perform high-speed rotational cutting while moving. The length of the fixed end of the prism telescopic rod is greater than or equal to the length between the two cutting blades when in their original position. The length of the prism telescopic rod keeps the distance the two cutting blades move fixed, preventing the blades from colliding with each other when they are on the same plane, which could cause the blades to break and create a safety hazard. At the same time, when the movable end of the prism telescopic rod retracts, it compresses the air inside the fixed end of the prism telescopic rod. The compressed air cleans the dust on the movable rod through the round hole, preventing dust from entering the fixed end and affecting the normal operation of the prism telescopic rod.
[0011] The transmission assembly also includes a motor fixedly mounted on the support slide plate. The output shaft of the motor is fixedly mounted to the rotating shaft of the prism transmission rod. Two motors drive two cutting blades to rotate and cut. The two motors can drive the cutting blades to cut the pipe at different speeds, making the structure simpler and easier to maintain. However, because two motors are used and their operating power is different, two vibration frequencies are generated when the cutting equipment is running. Since the cutting blades are in contact with the pipe at the same time, the two different vibration frequencies are transmitted to the pipe, affecting the pipe cutting and making the cut rough and uneven, which affects the use of the pipe fittings. Of course, if the flatness requirement of the pipe cross-section is not high, two motors can be used. The motor mounted on the mounting frame is driven by a flexible transmission mechanism such as a transmission belt, which greatly reduces the impact of vibration on pipe cutting.
[0012] The moving component includes a push block and an electric telescopic rod. The push block is fixedly installed on the support slide plate, and the electric telescopic rod is fixedly installed on the mounting frame. The movable end of the electric telescopic rod is fixedly installed to the push block. A first spring telescopic rod is fixedly installed on both the support slide plate and the mounting frame. A pressing block is fixedly installed on the first spring telescopic rod on the support slide plate. The pressing block is arc-shaped and has multiple rollers arranged in an arc. The outside of the rollers is covered with an anti-slip layer made of silicone rubber.
[0013] When cutting is required, the electric telescopic rod pushes the push block to move. Because the push block is fixedly installed with the support slide, the cutting blade moves accordingly to cut the pipe. Due to the different materials being cut, the moving speeds of the two electric telescopic rods are also different. A slower feed speed is required when cutting the outer layer, while a faster speed can be used when cutting the inner layer. Of course, during the actual cutting, the electric telescopic rod needs to be controlled to move in two directions: fast and slow. Because the pipe needs to be installed, the cutting blade will be away from the pipe cutting point during cutting. At this time, the electric telescopic rod needs to drive the cutting blade to the cutting point quickly. When preparing to cut, it needs to be switched to slow movement mode. Of course, when cutting the inner layer, the electric telescopic rod needs to push the cutting blade into the cut first to abut against the inner layer of the pipe.
[0014] When the electric telescopic rod pushes the cutting tool to move, it will drive the first spring telescopic rods on both sides to move closer to the pipe. It should be noted that the first spring telescopic rods are installed on the support plate by means of screw connection. When the first spring telescopic rods move closer to each other, they push the pressing block and roller on them to contact the pipe, so that the pipe remains fixed during cutting.
[0015] It should be added that the rollers on both sides are covered with an anti-slip layer. This is because the pipe needs to be moved after cutting, and the rollers on both sides will move to the sides to support the sliding plate and the electric telescopic rod. This prevents the rollers on both sides from contacting the pipe when it moves, so as not to hinder the movement of the pipe. The anti-slip layer made of silicone rubber material further increases the friction and prevents the pipe from moving during cutting.
[0016] The cutting tool includes a blade and a blade protective shell. A protective tube, fixedly installed with the blade protective shell, is sleeved on one side of the blade shaft. A corrugated tube, fixedly installed with the blade protective shell, is sleeved on the other side of the prism drive rod. A telescopic rod is fixedly installed on the blade protective shell. A push plate is fixedly installed at the movable end of the telescopic rod. A threaded rod is rotatably connected to the mounting frame. The push plate passes through the mounting frame and is threadedly connected to the threaded rod. Two opposing support plates are fixedly installed on the mounting frame. A sliding rod is rotatably connected between the support plates. A limit plate is slidably connected to the sliding rod. A threaded knob that abuts against the sliding rod is threadedly connected to the limit plate. The length of the sliding rod is greater than or equal to twice the length of the prism drive rod.
[0017] The cutting equipment operates in two modes. In single-cut mode, the rotating threaded rod moves a push plate connected to it, which in turn moves a connected telescopic rod. This telescopic rod then moves the cutting blades, aligning one blade with the other for single-cutting. In multi-segment cutting, rotating the threaded rod causes the cutting blades on both sides to stagger, ensuring the distance between them equals the length of the pipe to be cut. Simultaneously, the movement of the pipe allows one blade to enter the pipe's kerf for cutting. Since it's impossible to align the cutting seam precisely, a sliding rod and a limiting plate are needed. Adjusting the position of the limiting plate on the sliding rod ensures that the distance between the two cutting blades is equal to the distance from the limiting plate to the nearest cutting blade. This allows the cutting blades to quickly align with the pipe cutting seam, increasing the cutting speed. This is because when the distance between the two cutting blades is zero, the distance between the limiting plate and one of the cutting blades is also zero. When the distance between the two cutting blades is at its maximum, it is approximately the length of the prism drive rod. At this point, the distance between the limiting plate and one of the cutting blades is also the length of the prism telescopic rod. Therefore, the minimum length of the sliding rod is the length of the prism drive rod.
[0018] The protective tube can protect the prism drive rod on one side, while the installed corrugated pipe can protect the prism drive rod on the other side without hindering the movement of the cutting tool on the other side. At the same time, the limiting plate can not only limit the distance of pipe movement, but the support plate fixed on it can also support the pipe.
[0019] One end of the slide bar is equipped with a one-way ratchet, and the one-way ratchet is fitted with a gear. A rack plate that meshes with the gear is fixedly installed on one of the support slide plates. A support plate is slidably connected to the limiting plate. A screw that abuts against the limiting plate is installed on the support plate. One side of the support plate is arc-shaped.
[0020] During cutting, one end of the pipe abuts against the limiting plate. After cutting, the two support slides separate to the sides. The supporting slides then move the rack plate fixed to them. The moving rack plate meshes with a gear, causing the gear to rotate. This gear, through a one-way ratchet, drives a sliding rod to rotate. The sliding rod then rotates the limiting plate by a certain angle, pushing the pipe forward and pushing the broken pipe out. Simultaneously, when the pipe is about to tip over, the rack plate and gear disengage, and the tipping limiting plate stops the pipe. As the pipe falls, the limiting plate returns to its original position due to gravity, counteracting the force of the push. The sliding rod blocks the incoming pipe. However, because it is equipped with a one-way ratchet, the sliding rod will not rotate when the two support slides on both sides come together to cut. At the same time, the support plate supports one end of the pipe being cut, preventing the inner layer of the pipe from cracking due to its weight. Because the sliding rod is rotatably connected to the support plate, the limiting plate can also be flipped manually. Meanwhile, the curved support plate on one side can stably support the pipe. When the limiting plate is flipped, the pipe can easily slide down through the support plate on the side without the curved design.
[0021] A second spring telescopic rod is fixedly installed on the support slide plate. A cleaning iron plate is fixedly installed on the movable end of the second spring telescopic rod. The thickness of the cleaning iron plate is the same as the thickness of the cutting tool. The side of the cleaning iron plate near the pipe is blade-shaped. The cleaning iron plate and one of the cutting tools are on the same plane. The surface of the cleaning iron plate is provided with double cutting teeth. The spring strength in the second spring telescopic rod is less than the spring strength in the first spring telescopic rod.
[0022] Because the cleaning sheet and one of the cutting blades are on the same plane, when the supporting slide moves the cutting blade to block the pipe, the cutting blade will also block the pipe due to the second spring telescopic rod. Therefore, when the cutting blade cuts out a gap, the cleaning sheet will enter the gap and scrape out a large amount of dust particles inside the cut. At the same time, the double-cutting file teeth on the surface of the cleaning sheet polish the cross-section of the cut, making the cut cross-section smoother and finer, and improving the cutting effect.
[0023] The spring strength inside the second spring telescopic rod is less than that inside the first spring telescopic rod. This prevents the pipe from being subjected to uneven force due to excessive elasticity of the second spring telescopic rod, which would cause the cleaning iron plate to wobble and hinder cutting. At the same time, the cleaning iron plate with a blade-like edge on one side can make a scratch on the surface of the pipe when the blade cuts it, making it easier for the cutting tool to cut.
[0024] A cylinder is fixedly mounted on the mounting frame. An impeller is rotatably connected inside the cylinder, and the impeller is fixedly mounted to the output shaft of the drive motor. An air inlet pipe and an air outlet pipe are fixedly mounted on the cylinder. The first spring telescopic rod on the mounting frame is on the same plane as the outer cutting tool. A flexible contact plate is fixedly mounted on its movable end. The elasticity of the first spring telescopic rod is greater than that of the flexible contact plate. A downwardly tilted nozzle is mounted on the side of the flexible contact plate near the cutting tool. The other end of the air outlet pipe is connected to the nozzle. The surface of the flexible contact plate is covered with a film.
[0025] When the motor is running, it drives the impeller inside the cylinder to rotate, drawing external air into the nozzle. Because the first spring telescopic rod pushes the flexible contact plate to contact the pipe, the flexible contact plate adjusts to follow the curvature of the pipe being cut, always maintaining contact with the curved surface. Since the first spring telescopic rod and the cutting blade are on the same plane, the nozzle is always aimed at the cut, removing dust from within. Because the cleaning sheet is made of rigid material and its thickness is always less than the width of the cut, it can only scrape most of the dust out of the gap. Dust adhering to the cross-section or inner layer cannot be effectively cleaned, preventing dust from being generated during the cutting process. Dust interference affects the contact and friction between the cutting tool and the workpiece. Reducing dust helps to accurately control the cutting position and posture, thereby improving cutting quality and precision. However, excessive dust may adhere to the cutting tool, increasing wear and friction and shortening the tool's lifespan. By reducing dust at the kerf and blowing air into the cutting area, the wear and heat of the cutting tool can be reduced, extending its lifespan and reducing the frequency of maintenance and replacement. At the same time, the film covering the surface can reduce the friction generated by the pipe rotation when the flexible contact plate presses against the pipe, avoiding the need for a high-power motor to drive the pipe rotation due to excessive friction, allowing workers to easily push the pipe to rotate.
[0026] The mounting bracket has a rectangular groove at its bottom, and multiple cylinders are slidably connected in the rectangular groove. Two symmetrically arranged long plates are slidably connected to the cylinders. Screws that abut against the cylinders are threaded onto the long plates. Two symmetrically arranged roller frames are fixedly installed on the long plates. The rollers on the roller frames have anti-slip grooves, and one side of the roller frame is higher than the other side.
[0027] The adjustable roller frame allows for the use of pipes of different diameters. However, due to the different pipe materials, some pipes have a relatively soft overall structure. If fixed vertically, the pipes would deform during rotary cutting. Therefore, a cross-fixing method is used to secure the pipes. However, because the cutting blade on one side needs to cut the inner layer of the pipe, the distance the cutting blade on one side moves is greater than the distance on the other side. Since the elasticity of the first spring telescopic rods on both sides is the same, the compressive force generated by the first spring telescopic rod on the side with the longer movement distance is greater than the elastic force generated by the first spring telescopic rod on the other side. This causes the pipe to deform when the cutting equipment cuts the pipe. Therefore, one side of the roller frame is higher than the other side of the roller frame to ensure that the compressive force generated by the first spring telescopic rods on both sides is consistent.
[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0029] I. To address the issue of excessive wear on cutting tools caused by contact with the high-strength outer layer of material when cutting multi-layer pipes, leading to reduced tool life, various types of blades are used to cut multi-layer pipes. A step-by-step cutting principle is employed to cut each layer of the multi-layer pipe sequentially. Specifically, when cutting multiple pipe sections, a moving assembly drives one side of the cutting tool to cut the outer layer of the multi-layer pipe, while simultaneously moving the other side to cut the inner layer of the pipe after the outer layer has been cut. This ensures a smooth cut surface on the inner layer of the multi-layer pipe while avoiding unnecessary wear on the cutting tools, thus guaranteeing their lifespan.
[0030] 2. When cutting multiple sections, the cutting blades on both sides are staggered so that the distance between the cutting blades on both sides is equal to the length of the pipe to be cut. At the same time, because the pipe needs to be moved, when the blade on one side enters the pipe slit for cutting, it is impossible to align with the slit. It is necessary to slowly adjust the distance at one end of the pipe and adjust the position of the limiting plate on the slide rod so that the distance between the cutting blades on both sides is equal to the distance from the limiting plate to the nearest cutting blade. This allows the cutting blade to quickly align with the pipe slit. After the cutting is completed, the moving component drives the limiting plate to rotate, so that the cut pipe can be quickly pushed out, which significantly improves the cutting speed of the cutting equipment.
[0031] Third, when the pipe is rotating for cutting, the cleaning iron plate is pushed into the gap by the second spring telescopic rod. The rotation of the pipe can scrape out a large amount of dust particles in the cut. By reducing dust at the cut during and after cutting, the wear and heat of the cutting tool can be reduced, indirectly extending the life of the cutting tool. At the same time, the double-cutting file teeth on the surface of the cleaning iron plate polish the cross-section of the cut, making the cut cross-section smoother. Meanwhile, the cleaning iron plate with a blade-like edge on one side can scratch a mark on the surface of the pipe when the blade is cutting the pipe, thanks to the pushing force of the second spring telescopic rod, making it easier for the cutting tool to cut. Attached Figure Description
[0032] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0033] Figure 2 This is a schematic diagram of the front structure of the present invention;
[0034] Figure 3 This is a schematic diagram of the internal structure of the protective box in this invention;
[0035] Figure 4 This is a three-dimensional structural diagram of the limiting plate in this invention;
[0036] Figure 5 This is an enlarged structural schematic diagram of the tray in this invention;
[0037] Figure 6 This is a schematic diagram of the internal structure of the mounting bracket in this invention;
[0038] Figure 7 This is a three-dimensional structural diagram of the flexible contact plate in this invention;
[0039] Figure 8 This is a schematic diagram of the telescopic rod in this invention;
[0040] Figure 9 This is a schematic diagram of the internal structure of the prism telescopic rod in this invention;
[0041] Figure 10 This is a schematic diagram of the internal structure of the bellows in this invention.
[0042] In the diagram: 1. Mounting bracket; 2. Threaded rod; 3. Push plate; 4. Drive motor; 5. Cylinder; 6. Second transmission belt; 7. Support plate; 8. Cutting tool; 801. Outer cutting tool; 802. Inner cutting tool; 9. First spring telescopic rod; 10. Slide rod; 11. Limiting plate; 111. Support plate; 112. Screw; 12. Cylinder; 13. Roller frame; 14. Support slide plate; 15. First transmission belt; 16. Protective tube; 17. Corrugated pipe; 18. Pressing block; 19. 20. Second spring telescopic rod; 21. Cleaning iron sheet; 22. Roller; 23. Prismatic telescopic rod; 24. Bevel gear set; 25. Threaded knob; 26. Electric telescopic rod; 27. Push block; 38. Rack plate; 39. Gear; 30. One-way ratchet; 31. Flexible contact plate; 32. Nozzle; 33. Telescopic rod; 44. Stabilizing slide bar; 35. Round hole; 36. Air outlet pipe; 47. Long plate; 48. Connecting plate; 49. Protective box; 40. Prismatic transmission rod; 40. Air inlet pipe. Detailed Implementation
[0043] Please see Figures 1 to 10 This invention provides a PVC plastic drain pipe cutting machine, the technical solution of which is as follows:
[0044] Measure the inner and outer diameters of the pipe and input the specific values into the control panel of the cutting equipment. Adjust the roller frame 13 according to the required pipe diameter to match the pipe. Rotate the threaded knob 25 to move the limiting plate 11 to the designated position so that the distance between the two cutting blades 8 is equal to the distance between one of the cutting blades 8 and the limiting plate 11. Place the pipe to be cut onto the roller frame 13 and pull the flexible contact plate 33 upwards. Release the plate after the pipe is placed on the roller frame 13. (Reference) Figure 1 At the same time, adjust the support plate 111 to support one end of the pipe being cut, so as to prevent the inner layer of the pipe from cracking due to its weight.
[0045] refer to Figure 6The electric telescopic rod 28 pushes the push block 29 to move. The electric telescopic rod 28 can be a KA30 electric telescopic rod, or other models of electric telescopic rods can be selected. This invention requires extremely high telescopic accuracy of the electric telescopic rod 28 to accurately push the cutting tool 8 to move. Because the push block 29 is fixedly installed with the support slide plate 14, the cutting tool 8 moves accordingly to cut the pipe. Due to the different cutting materials, the moving speed of the electric telescopic rods 28 on both sides is also different. A slower feed speed is required when cutting the outer layer, while a faster speed can be used when cutting the inner layer. Of course, during the actual cutting, the electric telescopic rod 28 needs to be controlled to move its distribution, which is fast movement and slow movement. Because the pipe needs to be installed, the cutting tool 8 will be away from the pipe cutting point during cutting. At this time, the electric telescopic rod 28 needs to drive the cutting tool 8 to move quickly to the cutting point. When preparing to cut, it needs to switch to slow movement mode. Of course, when cutting the inner layer, the electric telescopic rod 28 needs to push the cutting tool 8 into the cut first to abut against the inner layer of the pipe.
[0046] refer to Figure 3 , 6 8. The first spring telescopic rod 9 will push the flexible contact plate 33 to contact the pipe, so that the flexible contact plate 33 will adjust according to the curvature of the pipe being cut, and always maintain contact with the curved surface of the pipe being cut. Since the first spring telescopic rod 9 and the cutting tool 8 are on the same plane, the nozzle 34 will always be aligned with the cut.
[0047] When the electric telescopic rod 28 pushes the cutting tool 8 to move, it will drive the first spring telescopic rods 9 on both sides to move closer to the pipe. The first spring telescopic rods 9 are installed on the support slide plate 14 by means of screws 112. When the first spring telescopic rods 9 move closer to each other, they push the pressing block 18 and roller 21 on them to contact the pipe, so that the pipe is fixed during cutting. Of course, the first spring telescopic rods 9 installed above the pipe will also fix the pipe.
[0048] refer to Figure 1 Because some pipe structures are flexible, they are fixed by cross-fixation. However, since the cutting tool 8 on one side needs to cut the inner layer of the pipe, the distance that the cutting tool 8 on one side moves is greater than the distance that the cutting tool 8 on the other side moves. Since the elasticity of the first spring telescopic rods 9 on both sides is the same, the squeezing force generated by the first spring telescopic rod 9 on the side with the longer movement distance is greater than the elastic force generated by the first spring telescopic rod 9 on the other side. This causes the pipe to deform when the cutting equipment cuts the pipe, so that the roller frame 13 on one side is higher than the roller frame 13 on the other side, so that the squeezing force generated by the first spring telescopic rods 9 on both sides on the pipe is consistent, and the cutting tool 8 can cut the pipe stably.
[0049] refer to Figure 1 and8 When the cutting tool 8 moves to the corresponding position, the motor starts, and the output shaft of the motor drives the lower prism telescopic rod 22 to rotate through the second transmission belt. The moving end of the rotating prism telescopic rod 22 drives the bevel gear set 23 in the protective box 41 to rotate. One of the bevel gear shafts of the bevel gear set 23 drives the lower cutting tool 8 to rotate through the first transmission belt 15, cutting the pipe placed in the middle. When the two tools are on the horizontal plane, a single part can be cut quickly. Of course, the position between the two tools can also be adjusted. This can be used when cutting multiple sections of pipe of the same length, so that the cutting equipment can cut the inner and outer walls of the pipe at the same time, improving the cutting speed. Because the cutting tool 8 is connected to the drive motor 4 through the prism telescopic rod 22, the cutting tools 8 on both sides can still perform high-speed rotation cutting when moving. Because two electric telescopic rods 28 are used, the feed speed of each cutting tool 8 is different, making the cutting surface smoother.
[0050] Alternatively, a motor can be installed on the support slide plate 14, with the motor output shaft fixedly mounted to the rotating shaft of the prism transmission rod 42. Each of the two motors drives two cutting blades 8 to rotate and cut. Through cooperation with the two electric telescopic rods 28, the two motors can drive the cutting blades 8 to cut the pipe at different speeds, making the structure simpler and easier to maintain. However, because two motors are used and their operating power is different, the cutting equipment generates two vibration frequencies during operation. Since the cutting blades 8 are in rigid contact with the pipe, the two different vibration frequencies are transmitted to the pipe, affecting the cutting of the pipe and making the cut rough and uneven, affecting the use of the pipe fittings. At the same time, the factory cost is also greatly increased. Of course, if the requirement for the flatness of the pipe cross-section is not high, two motors can be used.
[0051] When the cleaning sheet 20 and one of the cutting blades 8 are on the same plane, and the supporting slide plate 14 moves the cutting blade 8 to block the pipe, the cutting blade 8 will also block the pipe due to the second spring telescopic rod 19. Therefore, when the cutting blade 8 cuts out a gap, the cleaning sheet 20 will enter the gap and scrape out a large amount of dust particles in the cut. At the same time, the double-cutting file teeth on the surface of the cleaning sheet 20 will polish the cross-section of the cut, making the cross-section smoother after cutting.
[0052] refer to Figure 7While cutting, the motor drives the impeller 6 inside the cylinder 5 to rotate, drawing external air into the nozzle 34. Because the nozzle 34 is always aligned with the kerf, it removes dust from the kerf, preventing dust from interfering with the cutting process and affecting the contact and friction between the cutting tool and the workpiece. Reducing dust helps to accurately control the cutting position and posture, thereby improving cutting quality and precision. At the same time, excessive dust may adhere to the cutting tool, increasing wear and friction and shortening the tool's lifespan. By reducing dust at the kerf and blowing air at the cutting area, the wear and heat of the cutting tool can be reduced, extending its lifespan and reducing the frequency of maintenance and replacement.
[0053] refer to Figure 4 , 6 After cutting, the electric telescopic rod 28 drives the cutting blades 8 on both sides to move to the sides. At this time, the pipe continues to move and cut again. Because one end of the cutting blade 8 is equipped with a limiting plate 11 to limit its movement, the pipe cannot move at this time. After cutting, the supporting slide plates 14 on both sides separate to the sides. At this time, the supporting slide plates 14 drive the rack plate 30 fixed on it to move. The moving rack plate 30 meshes with the gear 31, causing the gear 31 to rotate. At this time, the gear 31 can drive the slide rod 10 through the one-way ratchet 32. Rotating the slide bar 10 causes the limiting plate 11 to rotate at a certain angle, which can then push the pipe to move and push out the broken pipe. At the same time, when the pipe is about to tip over, the rack plate 30 and the gear 31 are misaligned, and the flipped limiting plate 11 abuts against the pipe. When the pipe falls, the limiting plate 11 will also return to its original position due to gravity, blocking the pushed pipe. Of course, because a one-way ratchet 32 is installed, the limiting plate will not rotate when the two side support slide plates 14 close together to cut, maintaining the limiting state of the pipe.
[0054] The foregoing has described embodiments of the present invention. However, those skilled in the art can make various changes, modifications, and substitutions to the embodiments based on an understanding of the principles of the present invention. The scope of the present invention is defined by the claims and related content.
Claims
1. A PVC plastic drain pipe cutting machine, comprising a mounting frame (1), wherein a cutting blade (8) is mounted on the mounting frame (1), and a drive motor (4) for driving the cutting blade (8) to rotate is connected to the cutting blade (8), characterized in that: The cutting tool (8) is provided in two parts, including an inner cutting tool (802) and an outer cutting tool (801). Multiple stabilizing slide rods (36) are fixedly mounted on the mounting bracket (1). Multiple supporting slide plates (14) are slidably connected to the stabilizing slide rods (36). A prism drive rod (42) is rotatably connected between two supporting slide plates (14) on one side. The inner cutting tool (802) is slidably mounted on the prism drive rod (42), and the outer cutting tool (801) is mounted on two supporting slide plates (14) on the other side. The inner cutting tool (802) and the outer cutting tool (801) are connected... The axial spacing of the cutting blades (801) is equal to the length of the pipe to be cut. The mounting bracket (1) is equipped with a moving component connected to the two side support slides (14). The moving component drives the inner cutting blade (802) and the outer cutting blade (801) to cut the inner and outer layers of the pipe respectively. At the same time, the moving component fixes the pipe when it is running. The support slide (14) is equipped with a transmission component that connects the output shaft of the drive motor (4) and the cutting blade (8). The transmission component drives the inner cutting blade (802) and the outer cutting blade (801) to rotate simultaneously.
2. The PVC plastic drain pipe cutting machine according to claim 1, characterized in that: The transmission assembly includes a connecting plate (40), a prism telescopic rod (22), a first transmission belt (15), a bevel gear set (23), a second transmission belt (6), a first spring telescopic rod (9), and a rubber anti-slip block. A prism telescopic rod (22) is provided on one side of the stabilizing slide rod (36). Multiple connecting plates (40) are rotatably connected to the prism telescopic rod (22). The connecting plates (40) are fixedly installed on the stabilizing slide rod (36). A rotating rod is rotatably connected to the supporting slide plate (14). A bevel gear set (23) is installed between the rotating rod and the movable end of the prism telescopic rod (22). A protective box (41) is provided outside the bevel gear set (23). The protective box (41) is fixedly installed on the supporting slide plate (14). On the slide plate (14), the supporting slide plates (14) on both sides are provided with first transmission belts (15). The first transmission belt (15) on one side is installed between the rotating rod and the rotating shaft of the external cutting tool (801), and the first transmission belt (15) on the other side is installed between the rotating rod and the rotating shaft of the prism transmission rod (42). The length of the fixed end of the prism telescopic rod (22) is greater than the sum of the lengths of the movable ends on both sides of the prism telescopic rod (22). A second transmission belt (6) is installed between the drive motor (4) and the fixed end of the prism telescopic rod (22). The fixed rod of the prism telescopic rod (22) has multiple circular holes (37) distributed in a circular pattern at both ends, and the circular holes (37) are connected to the inside of the prism telescopic rod (22).
3. A PVC plastic drain pipe cutting machine according to claim 1, characterized in that: The moving component includes a push block (29) and an electric telescopic rod (28). The push block (29) is fixedly installed on the support slide plate (14), and the electric telescopic rod (28) is fixedly installed on the mounting frame (1). The movable end of the electric telescopic rod (28) is fixedly installed with the push block (29). A first spring telescopic rod (9) is fixedly installed on both the support slide plate (14) and the mounting frame (1). A pressing block (18) is fixedly installed on the movable end of the first spring telescopic rod (9). The pressing block (18) is arc-shaped. Multiple rollers (21) arranged in an arc shape are installed on the pressing block (18), and the outside of the rollers (21) is wrapped with an anti-slip layer made of silicone rubber material.
4. A PVC plastic drain pipe cutting machine according to claim 3, characterized in that: The cutting tool (8) includes a blade and a blade protective shell. A protective tube (16) fixedly installed on the blade shaft on one side is fitted with a protective tube (16) fixedly installed with the blade protective shell. A corrugated tube (17) fixedly installed on the prism transmission rod (42) on the other side is fitted with a corrugated tube (17) fixedly installed with the blade protective shell. A telescopic rod (35) is fixedly installed on the blade protective shell. A push plate (3) is fixedly installed on the movable end of the telescopic rod (35). A threaded rod (2) is rotatably connected to the mounting bracket (1). The push plate (3) The mounting bracket (1) is threaded through and connected to the threaded rod (2). Two opposing support plates (7) are fixedly installed on the mounting bracket (1). A slide rod (10) is rotatably connected between the support plates (7). A limit plate (11) is slidably connected to the slide rod (10). A threaded knob (25) that abuts against the slide rod (10) is threaded on the limit plate (11). The length of the slide rod (10) is greater than or equal to twice the length of the prism transmission rod (42).
5. A PVC plastic drain pipe cutting machine according to claim 4, characterized in that: One end of the slide bar (10) is equipped with a one-way ratchet (32), and the one-way ratchet (32) is fitted with a gear (31). A rack plate (30) that meshes with the gear (31) is fixedly installed on one of the support slide plates (14). A support plate (111) is slidably connected to the limiting plate (11). A screw (112) that abuts against the limiting plate (11) is installed on the support plate (111). One side of the support plate (111) is arc-shaped.
6. A PVC plastic drain pipe cutting machine according to claim 5, characterized in that: A second spring telescopic rod (19) is fixedly installed on the support slide plate (14). A cleaning iron plate (20) is fixedly installed on the movable end of the second spring telescopic rod (19). The thickness of the cleaning iron plate (20) is the same as the thickness of the cutting tool (8). The cleaning iron plate (20) is blade-shaped on the side near the pipe. The cleaning iron plate (20) and one of the cutting tools (8) are on the same plane. The surface of the cleaning iron plate (20) is provided with double cutting teeth. The spring strength in the second spring telescopic rod (19) is less than the spring strength in the first spring telescopic rod (9).
7. A PVC plastic drain pipe cutting machine according to claim 6, characterized in that: A cylinder (5) is fixedly installed on the mounting bracket (1). An impeller is rotatably connected inside the cylinder (5), and the impeller is fixedly installed with the output shaft of the drive motor (4). An air inlet pipe (43) and an air outlet pipe (38) are fixedly installed on the cylinder (5). The first spring telescopic rod (9) on the mounting bracket (1) is on the same plane as the outer cutting tool (801). A flexible contact plate (33) is fixedly installed on its movable end. The elasticity of the first spring telescopic rod (9) is greater than that of the flexible contact plate (33). A downwardly inclined nozzle (34) is installed on the side of the flexible contact plate (33) near the cutting tool (8). The other end of the air outlet pipe (38) is connected to the nozzle (34). The surface of the flexible contact plate (33) is covered with a film.
8. A PVC plastic drain pipe cutting machine according to claim 1, characterized in that: The mounting bracket (1) has a rectangular groove at its bottom. Multiple cylinders (12) are slidably connected in the rectangular groove. Two symmetrically arranged long plates (39) are slidably connected on the cylinders (12). The long plates (39) are threaded with fixing bolts that abut against the cylinders (12). A roller frame (13) is fixedly installed on the long plate (39), and one side of the roller frame (13) is higher than the other side of the roller frame (13).