A plastic pipe end finishing device

Abstract

The application relates to the technical field of pipe processing equipment, and particularly discloses a plastic pipe end finishing device which comprises a base and further comprises a polishing mechanism fixedly installed on the top of the base, and a reinforcing mechanism fixedly installed in the polishing mechanism; wherein the polishing mechanism comprises a bottom cover fixedly connected to the upper surface of the base, and the inside bottom surface of the bottom cover is fixedly connected with a connecting plate in a symmetrical mode. When the threaded rod rotates, the negative pressure plate on the inner surface of the bottom cover is driven to move downwards along the connecting plate through the thread effect, so that the top cavity of the bottom cover is in a negative pressure state, that is, starts to extract air from above the rotating frame for filling, and the polished plastic powder is absorbed and stored above the negative pressure plate in the bottom cover by using the negative pressure mechanism during polishing, so that the production safety is greatly improved, pollution is avoided, and the problem of difficult follow-up cleaning caused by the scattered and fallen plastic powder generated during polishing is also avoided.

Description

Technical Field

[0001] This invention relates to the field of pipe processing equipment technology, specifically a device for trimming and processing the ends of plastic pipes. Background Technology

[0002] Plastic pipes (such as polyethylene (PE) pipes, polyvinyl chloride (PVC) pipes, polypropylene (PP) pipes, and various flexible plastic hoses) often have defects at their ends after injection molding, extrusion, or cutting. These defects include burrs, flash, uneven cross-sections, or port deformation. End finishing is necessary to meet the precision requirements of subsequent connections (such as butt welding, socket welding, and threaded connections). End finishing equipment is specifically designed for grinding, chamfering, or rounding the ends of plastic pipes. It is widely used in building water supply and drainage pipeline installation, agricultural irrigation system construction, chemical pipeline laying, and plastic pipe fitting manufacturing.

[0003] Existing plastic pipe end-trimming devices still have the following shortcomings in practical applications: First, traditional trimming devices are mostly handheld electric grinding tools or fixed grinding wheel mechanisms. During the grinding process, plastic debris and powder are scattered into the air in large quantities under the action of the high-speed rotating grinding head. This not only seriously pollutes the working environment and poses a threat to the respiratory health of operators, but also, due to the electrostatic adsorption properties of plastic powder, it easily adheres to the equipment surface and the surrounding ground, making cleaning difficult and time-consuming. Existing equipment generally lacks a structural design for simultaneous negative pressure suction and closed collection of dust during the grinding process, resulting in the need for additional manual cleaning and dust removal after each operation. Second, for soft plastic pipes (such as PE hoses, PVC spring pipes, etc.), whose walls are thin and lack rigidity, the grinding force during the rotational trimming of the grinding head contact end causes radial contraction or deformation of the pipe end, resulting in an elliptical or irregular shape of the end face after grinding, which cannot meet the fitting tolerance requirements of socket connections. Traditional equipment lacks a support structure to open and shape the pipe end from the inside during the grinding process. The grinding and support functions are separated, and operators often need to manually widen the pipe end before grinding, resulting in fragmented processes, low efficiency, and difficulty in guaranteeing accuracy. Thirdly, the grinding head and pipe clamping position of existing fixed dressing devices are relatively fixed. When dealing with pipes of different inner diameters or wall thicknesses, it is necessary to change the grinding head of the corresponding size or adjust the clamp, which is cumbersome. Especially when dealing with multiple specifications of pipes in on-site construction, frequent changes of size seriously affect the work progress. Fourthly, the grinding head of traditional grinding mechanisms has rigid contact with the pipe end, lacking an elastic floating buffer mechanism. When there are irregular cuts at the pipe end or the operator's pushing angle is slightly off, rigid contact can easily lead to grinding head jamming, overheating and melting of the pipe end, or uneven grinding, which not only affects the dressing quality but also easily damages the grinding tools. Summary of the Invention

[0004] (a) Technical problems to be solved The present invention provides a device for trimming the ends of plastic pipes, which solves the problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a plastic pipe end trimming device, comprising a base, and further comprising: a grinding mechanism fixedly installed on the top of the base; a reinforcing mechanism fixedly installed inside the grinding mechanism; wherein the grinding mechanism comprises a bottom cover fixedly connected to the upper surface of the base, a connecting plate symmetrically fixedly connected to the inner bottom surface of the bottom cover, a mounting plate fixedly connected to the top of the connecting plate, and a tubular outer cover fixedly connected to the inner top surface of the bottom cover; a motor fixedly installed on the outer bottom surface of the bottom cover, a threaded rod rotatably connected to the output end of the motor, the top of the threaded rod rotatably connected to the mounting plate, a rotating frame rotatably connected to the side surface of the mounting plate, the rotating frame being annular, the outer side of the rotating frame rotatably connected to the inner bottom surface of the outer cover, and a grinding frame elastically slidingly connected to the inner surface of the rotating frame.

[0006] According to one embodiment of the present invention, an adapter rod is rotatably connected to the inner bottom edge of the bottom cover, and the top of the adapter rod is rotatably connected to the bottom surface of the outer cover; an adapter wheel is fixedly sleeved on the outer surface of the adapter rod, and the outer surface of the adapter wheel is rotatably connected to the outer surface of the rotating frame; a transmission belt is also rotatably connected to the outer surface of the adapter wheel, and the end of the transmission belt away from the adapter wheel is rotatably connected to the outer surface of the threaded rod.

[0007] According to one embodiment of the present invention, the reinforcing mechanism includes a negative pressure plate, the side surface of which is slidably connected to the inner side surface of the bottom cover, and the middle part of which is threadedly connected to the outer surface of the threaded rod.

[0008] According to one embodiment of the present invention, a stabilizing frame is rotatably connected to the top of the threaded rod, and four connecting rods are fixedly connected through the outer end of the stabilizing frame, with the bottom of the connecting rods fixedly connected to the upper surface of the mounting plate.

[0009] According to one embodiment of the present invention, a magnetic tube is threadedly connected to the top outer surface of the threaded rod, wherein the magnetic tube does not magnetically attract the threaded rod, and an installation tube is rotatably connected to the outer surface of the magnetic tube, wherein the installation tube magnetically attracts the magnetic tube; a limit rod is fixedly connected to the top outer surface of the installation tube, and the outer end of the limit rod is slidably sleeved on the connecting rod.

[0010] According to one embodiment of the present invention, four movable blocks are arranged around the outer circumference of the mounting tube, and an extrusion plate is fixedly connected to the outer surface of the movable blocks. The extrusion plate is arc-shaped, and the four extrusion plates are combined to form a ring.

[0011] According to one embodiment of the present invention, the inner surface of the movable block is provided with a groove, the inner surface of the groove is inclined, and four driving blocks are fixedly connected around the bottom outer surface of the mounting tube, the side surface of the driving blocks is attached to the inner surface of the groove of the movable block.

[0012] According to one embodiment of the present invention, positioning plates are elastically slidably inserted into both ends of the movable block, wherein four movable blocks are combined into a ring shape by means of positioning plates, a movable rod is fixedly connected through the middle of the positioning plate, and sliding frames are symmetrically slidably connected to both ends of the movable rod, wherein the top sliding frame is fixedly connected to the outer end of the stabilizer, and the bottom sliding frame is fixedly embedded in the upper surface of the mounting plate.

[0013] When you need to use this equipment, simply fix it in place with the base, insert the end of the plastic hose that needs to be polished into the outer cover and press it against the polishing frame. Then start the motor. After the motor starts, it will drive the threaded rod to rotate. The rotation of the threaded rod will drive the transmission belt to rotate, which will cause the adapter rod and adapter wheel to start rotating. This will drive the rotating frame and the polishing frame to rotate and polish the end of the plastic hose.

[0014] (III) Beneficial Effects This invention provides a device for trimming the ends of plastic pipes. It has the following advantages: (I) When the threaded rod of this plastic pipe end trimming device rotates, it will drive the negative pressure plate on the inner surface of the bottom cover to move down along the connecting plate through the thread action, thereby making the top cavity of the bottom cover in a negative pressure state, that is, it will start to draw air from above the rotating frame to fill it. This realizes that during grinding, the plastic powder produced by grinding is absorbed and stored in the bottom cover above the negative pressure plate by using the negative pressure mechanism. This not only greatly improves production safety and avoids pollution, but also avoids the problem of subsequent cleaning difficulties caused by the plastic powder produced by grinding scattering everywhere.

[0015] (II) In this plastic pipe end trimming device, the rotation of the threaded rod simultaneously drives the magnetic tube to rotate. Initially, the magnetic tube is attracted to the installation tube, and the installation tube is limited by the connection between the limiting rod and the connecting rod. That is, when the threaded rod initially rotates, it will drive the magnetic tube and the installation tube to move upward along the connecting rod. The upward movement of the installation tube will cause the drive block to move upward synchronously. Then, under the action of the inclined slide, it will start to squeeze the movable block. The two ends of the movable block are inserted with positioning plates. The positioning plates cannot move vertically, that is, the movable block cannot move upward synchronously with the installation tube. At this time, under the squeezing action of the drive block, the movable block, the positioning plates and the movable rod will slide outward on the sliding frame. That is, the squeezing plate on the outer surface of the movable block begins to spread outward. Finally, the outer surface of the squeezing plate squeezes the inner surface of the plastic hose, so that the end of the plastic hose is automatically opened when it is being polished, so that it always maintains a round shape. This greatly improves the polishing efficiency and avoids the problem of incomplete polishing caused by the deformation of the end of the plastic hose under the rotation of the polishing frame.

[0016] (III) In this plastic pipe end trimming device, when the extrusion plate cannot expand outward after pressing against the inner surface of the plastic hose, the rotation of the threaded rod will drive the magnetic tube to overcome the magnetic force and rotate relative to the installation tube. This achieves automatic stopping of extrusion after supporting the inner wall of the plastic hose, without affecting the subsequent grinding process. This avoids the problem of plastic hose being crushed and damaged by direct rigid extrusion. At the same time, in conjunction with the grinding frame that is elastically mounted on the rotating frame, the grinding process can be elastically floating throughout, which not only improves grinding efficiency but also provides a certain buffer for the operation of the equipment, avoiding equipment damage and greatly extending the service life of the equipment. After grinding is completed, simply reverse the motor to drive the equipment to reset and quickly remove the plastic hose. After inserting a new hose, the motor can be restarted to continue grinding, greatly improving the production continuity of the equipment and eliminating the need for frequent adjustments. In addition, the expanding extrusion plate can also make the equipment automatically adapt to plastic hoses with different inner diameters and thicknesses, greatly improving the applicability of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the bottom cover of the present invention; Figure 3 This is a schematic diagram of the installation position of the rotating frame of the present invention; Figure 4 This is a schematic diagram of the negative pressure plate of the present invention; Figure 5 This is a schematic diagram of the threaded rod of the present invention; Figure 6 This is a schematic diagram of the structure of the active block of the present invention; Figure 7This is a schematic diagram of the structure of the movable rod of the present invention; Figure 8 This is a schematic diagram of the installation pipe and its connection structure of the present invention.

[0018] In the diagram: 1. Base; 2. Grinding mechanism; 21. Base cover; 22. Connecting plate; 23. Mounting plate; 24. Outer cover; 25. Motor; 26. Threaded rod; 27. Rotating frame; 28. Grinding frame; 29. ​​Adapter rod; 210. Adapter wheel; 211. Transmission belt; 3. Reinforcing mechanism; 31. Negative pressure plate; 32. Stabilizing frame; 33. Connecting rod; 34. Magnetic tube; 35. Mounting tube; 36. Limiting rod; 37. Movable block; 38. Extrusion plate; 39. Slide groove; 310. Drive block; 311. Positioning plate; 312. Movable rod; 313. Sliding frame. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] First embodiment: as follows Figures 1 to 8 As shown, the present invention provides a technical solution: a plastic pipe end trimming device, including a base 1, and further comprising: Grinding mechanism 2 is fixedly installed on the top of base 1; Reinforcing mechanism 3 is fixedly installed inside the grinding mechanism 2; The grinding mechanism 2 includes a base cover 21, which is fixedly connected to the upper surface of the base 1. A connecting plate 22 is symmetrically fixedly connected to the bottom surface of the base cover 21. A mounting plate 23 is fixedly connected to the top of the connecting plate 22. A tubular outer cover 24 is fixedly connected to the top inner surface of the base cover 21. A motor 25 is fixedly installed on the outer bottom surface of the base cover 21. A threaded rod 26 is rotatably connected to the output end of the motor 25. The top of the threaded rod 26 is rotatably connected to the mounting plate 23. A rotating frame 27 is rotatably connected to the side surface of the mounting plate 23. The rotating frame 27 is ring-shaped. The outer side of the rotating frame 27 is rotatably connected to the bottom inner surface of the outer cover 24. A grinding frame 28 is elastically slidably connected to the inner surface of the rotating frame 27.

[0021] An adapter rod 29 is rotatably connected to the inner bottom edge of the bottom cover 21, and the top of the adapter rod 29 is rotatably connected to the bottom surface of the outer cover 24; The outer surface of the adapter rod 29 is fixedly fitted with an adapter wheel 210. The outer surface of the adapter wheel 210 is rotatably connected to the outer surface of the rotating frame 27. The outer surface of the adapter wheel 210 is also rotatably connected to a transmission belt 211. The end of the transmission belt 211 away from the adapter wheel 210 is rotatably connected to the outer surface of the threaded rod 26.

[0022] Second embodiment: as follows Figures 1 to 8 As shown, the reinforcing mechanism 3 includes a negative pressure plate 31, the side surface of which is slidably connected to the inner side surface of the bottom cover 21, and the middle part of the negative pressure plate 31 is threadedly connected to the outer surface of the threaded rod 26.

[0023] A stabilizing frame 32 is rotatably connected to the top of the threaded rod 26. Four connecting rods 33 are fixedly connected through the outer end of the stabilizing frame 32. The bottom of the connecting rods 33 is fixedly connected to the upper surface of the mounting plate 23.

[0024] A magnetic tube 34 is threadedly connected to the top outer surface of the threaded rod 26. The magnetic tube 34 does not magnetically attract the threaded rod 26. An installation tube 35 is rotatably connected to the outer surface of the magnetic tube 34. The installation tube 35 magnetically attracts the magnetic tube 34. A limiting rod 36 is fixedly connected to the top outer surface of the mounting tube 35, and the outer end of the limiting rod 36 is slidably sleeved on the connecting rod 33.

[0025] Four movable blocks 37 are arranged around the outer circumference of the mounting tube 35. An extrusion plate 38 is fixedly connected to the outer surface of the movable block 37. The extrusion plate 38 is arc-shaped, and the four extrusion plates 38 are combined to form a ring.

[0026] The inner surface of the movable block 37 is provided with a groove 39, and the inner surface of the groove 39 is inclined. Four drive blocks 310 are fixedly connected around the bottom outer surface of the mounting tube 35. The side surfaces of the drive blocks 310 are attached to the inner surface of the groove 39 of the movable block 37.

[0027] Positioning plates 311 are elastically slidably inserted into both ends of the movable block 37. The four movable blocks 37 are combined into a ring shape by the positioning plates 311. A movable rod 312 is fixedly connected through the middle of the positioning plate 311. Sliding frames 313 are symmetrically slidably connected to both ends of the movable rod 312. The top sliding frame 313 is fixedly connected to the outer end of the stabilizer 32, and the bottom sliding frame 313 is fixedly embedded in the upper surface of the mounting plate 23.

[0028] During operation, the device is fixed in place by the base 1, and the end of the plastic hose to be ground is inserted into the outer cover 24 and pressed against the grinding frame 28. Then, the motor 25 is started, which drives the threaded rod 26 to rotate. The rotation of the threaded rod 26 drives the transmission belt 211, causing the adapter rod 29 and adapter wheel 210 to rotate. This, in turn, causes the rotating frame 27 and the grinding frame 28 to rotate, grinding and trimming the end of the plastic hose. As the threaded rod 26 rotates, the threaded action causes the negative pressure plate 31 on the inner surface of the base cover 21 to move down along the connecting plate 22, creating a negative pressure state in the top cavity of the base cover 21. This draws air from above the rotating frame 27 to fill the cavity, achieving negative pressure during grinding. The plastic powder produced is absorbed and stored above the negative pressure plate 31 in the bottom cover 21, which not only greatly improves production safety and avoids pollution, but also avoids the problem of subsequent cleaning difficulties caused by the plastic powder generated during grinding scattering everywhere. When the threaded rod 26 rotates, it will drive the magnetic tube 34 to rotate at the same time. Initially, since the magnetic tube 34 is attracted to the mounting tube 35, and the mounting tube 35 is limited and connected to the connecting rod 33 through the limiting rod 36, when the threaded rod 26 rotates initially, it will drive the magnetic tube 34 and the mounting tube 35 to move upward along the connecting rod 33. The upward movement of the mounting tube 35 will cause the driving block 310 to move upward synchronously, and then, under the action of the inclined slide 39, it will begin to squeeze the movable block 37. The two ends of the movable block 37 are inserted with positioning plates 311. 1. Vertical movement is impossible, meaning the movable block 37 cannot move upwards synchronously with the mounting tube 35. At this point, under the squeezing action of the drive block 310, the movable block 37, positioning plate 311, and movable rod 312 slide outwards on the sliding frame 313. The squeezing plate 38 on the outer surface of the movable block 37 begins to expand outwards, eventually pressing against the inner surface of the plastic hose. This automatically expands the end of the hose during grinding, maintaining its round shape and significantly improving grinding efficiency. It avoids the problem of incomplete grinding caused by deformation of the plastic hose end under the rotation of the grinding frame 28. Once the squeezing plate 38 is pressed against the inner surface of the plastic hose, it cannot continue to expand outwards. At this point, the threaded rod 26... The rotation of the motor causes the magnetic tube 34 to rotate relative to the mounting tube 35, overcoming the magnetic force. This automatically stops the squeezing after supporting the inner wall of the plastic hose, without affecting the subsequent grinding process. It avoids the problem of the plastic hose being damaged by direct rigid squeezing. Simultaneously, the grinding frame 28, elastically mounted on the rotating frame 27, allows for a fully flexible floating grinding process, improving grinding efficiency and providing a buffer for equipment operation, preventing damage and significantly extending the equipment's lifespan. After grinding, simply reverse the motor 25 to reset the equipment, quickly remove the plastic hose, insert a new hose, and restart the motor 25 to continue grinding. This greatly improves the continuity of production and eliminates the need for frequent adjustments.Meanwhile, the expanding extrusion plate 38 allows the equipment to automatically adapt to plastic hoses of different inner diameters and thicknesses, significantly improving its applicability.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for trimming the ends of plastic pipes, comprising a base, characterized in that: Also includes: A polishing mechanism, which is fixedly installed on the top of the base; The reinforcing mechanism is fixedly installed inside the grinding mechanism; The grinding mechanism includes a base cover, which is fixedly connected to the upper surface of the base. A connecting plate is symmetrically fixedly connected to the bottom surface of the base cover. A mounting plate is fixedly connected to the top of the connecting plate. A tubular outer cover is fixedly connected to the top inner surface of the base cover. A motor is fixedly installed on the outer bottom surface of the base cover. A threaded rod is rotatably connected to the output end of the motor. The top of the threaded rod is rotatably connected to the mounting plate. A rotating frame is rotatably connected to the side surface of the mounting plate. The rotating frame is ring-shaped. The outer side of the rotating frame is rotatably connected to the bottom inner surface of the outer cover. A grinding frame is elastically slidably connected to the inner surface of the rotating frame.

2. The plastic pipe end trimming device according to claim 1, characterized in that: The inner bottom edge of the bottom cover is rotatably connected to an adapter rod, and the top of the adapter rod is rotatably connected to the bottom surface of the outer cover. An adapter wheel is fixedly sleeved on the outer surface of the adapter rod. The outer surface of the adapter wheel is rotatably connected to the outer surface of the rotating frame. A transmission belt is also rotatably connected to the outer surface of the adapter wheel. The end of the transmission belt away from the adapter wheel is rotatably connected to the outer surface of the threaded rod.

3. The plastic pipe end trimming device according to claim 2, characterized in that: The reinforcing mechanism includes a negative pressure plate, the side surface of which is slidably connected to the inner side surface of the bottom cover, and the middle part of which is threadedly connected to the outer surface of the threaded rod.

4. The plastic pipe end trimming device according to claim 3, characterized in that: The top of the threaded rod is rotatably connected to a stabilizing frame, and the outer end of the stabilizing frame is fixedly connected to four connecting rods. The bottom of the connecting rods is fixedly connected to the upper surface of the mounting plate.

5. The plastic pipe end trimming device according to claim 4, characterized in that: A magnetic tube is threadedly connected to the top outer surface of the threaded rod, wherein the magnetic tube does not magnetically attract the threaded rod, and an installation tube is rotatably connected to the outer surface of the magnetic tube, wherein the installation tube magnetically attracts the magnetic tube. A limiting rod is fixedly connected to the top outer surface of the mounting tube, and the outer end of the limiting rod is slidably sleeved on the connecting rod.

6. The plastic pipe end trimming device according to claim 5, characterized in that: Four movable blocks are arranged around the outer circumference of the mounting tube. An extrusion plate is fixedly connected to the outer surface of the movable block. The extrusion plate is arc-shaped, and the four extrusion plates are combined to form a ring.

7. The plastic pipe end trimming device according to claim 6, characterized in that: The inner surface of the movable block is provided with a sliding groove, and the inner surface of the sliding groove is inclined. Four driving blocks are fixedly connected around the bottom outer surface of the mounting tube, and the side surface of the driving blocks is attached to the inner surface of the sliding groove of the movable block.

8. The plastic pipe end trimming device according to claim 7, characterized in that: Positioning plates are elastically slidably inserted into both ends of the movable block. Four movable blocks are combined into a ring shape through the positioning plates. A movable rod is fixedly connected through the middle of the positioning plate. Sliding frames are symmetrically slidably connected to both ends of the movable rod. The top sliding frame is fixedly connected to the outer end of the stabilizer, and the bottom sliding frame is fixedly embedded in the upper surface of the mounting plate.

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