A polyvinyl chloride resin anti-caking conveying pipe

Abstract

This invention relates to the field of pipeline technology, and more particularly to a polyvinyl chloride resin anti-caking pipeline, comprising a chain drive box, a chain driven box, and a conveying chain, as well as a main pipe and a secondary pipe mounted on the chain drive box. Each main pipe and secondary pipe has a conversion plate at its other end. A side block is fixedly connected to the bottom of the conversion plate on the side away from the chain drive box. Several threaded grooves are opened on the front side of the side block and the conversion plate. A corner frame is provided on the front side of the conversion plate. This invention, through the design of a push-out mechanism and an expansion mechanism, sets the tail of the polyvinyl chloride resin conveying pipeline in an L-shape. This allows for vertical installation when not in use for expansion, minimizing the need for excessive production space. Furthermore, it enables rapid flipping of the tail section of the conveying pipeline during later production line expansion, while maintaining a closed chain loop. This eliminates the need for chain cutting, splicing, tensioning, and other shutdown operations, allowing the conveying pipeline to be extended later without chain disassembly, achieving two states in one machine.

Description

Technical Field

[0001] This invention relates to the field of pipeline technology, and more particularly to a polyvinyl chloride resin anti-caking pipeline. Background Technology

[0002] Polyvinyl chloride (PVC) resin powder is highly hygroscopic and prone to static electricity buildup. Traditional belt or screw conveyors are prone to bridging, sticking to walls, and clogging, and dust spillage can harm the environment. Therefore, a closed-loop tubular chain conveying system is adopted for PVC resin powder. A continuous scraper chain is arranged inside the pipeline. The drive head drives the chain to slide at low speed, and the scraper pushes the resin powder forward along the pipe wall. There is no dust leakage from the entire pipeline, no need for manual pipe tapping, and flexible distribution and metering switching between multiple production lines. This ensures that the PVC resin powder is dry, loose, and continuously reaches the downstream extrusion or injection molding equipment, significantly improving conveying efficiency and workshop cleanliness, and reducing material waste and occupational health risks.

[0003] Existing tubular chain conveyors mostly adopt a fixed length, straight, rigid structure. The conveying distance and feeding height are determined at the factory. When the production capacity of polyvinyl chloride resin powder is expanded or the process needs to be adjusted to extend the conveying section, users can only replace the entire tubular chain conveyor with a longer one or add a second piece of equipment. This results in the need to stop the machine to cut the chain, reconnect it, and tension it. The construction period is long and the investment cost is high, and the original equipment is left idle.

[0004] Therefore, a polyvinyl chloride resin anti-caking conveying pipe is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a polyvinyl chloride resin anti-caking conveying pipe.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a polyvinyl chloride resin anti-caking conveying pipe, comprising a pipe chain drive box, a pipe chain driven box, and a conveying pipe chain, as well as a main pipe and a secondary pipe disposed on the pipe chain drive box. A conversion plate is provided at the other end of each of the main pipe and the secondary pipe. A side block is fixedly connected to the bottom of the conversion plate on the side away from the pipe chain drive box. Several threaded grooves are formed on the front side of the side block and the conversion plate. A corner frame is provided on the front side of the conversion plate. A sealing plate is provided on the front side of the corner frame, and bolts are threaded through the sealing plate at positions relative to the front of the threaded grooves. A cylinder is rotatably connected to the front side of the conversion plate. Several insert teeth for transmitting the movement of the conveying pipe chain are slidably connected through the outer wall of the cylinder. The cylinder is provided with a storage mechanism for retracting the insert teeth. A groove is opened between the side block and the front side of the conversion plate. A lower semi-circular hole frame is slidably connected to the inner side of the groove. A pair of vertical grooves are opened on the front side of both the side block and the conversion plate. The vertical grooves are connected through the inner side of the groove. A side pipe clamp is fixedly connected to the front side of the side block. An ejection mechanism for ejecting the lower semi-circular hole frame is provided in the vertical groove. An expansion mechanism for horizontally installing the conveying pipe chain is also provided.

[0007] In the above technical solution, furthermore, the corner frame sidewall and top are provided with through grooves, the front side of the conversion plate is fixedly connected to the position in the through groove, the top of the corner frame is provided with a top cylinder, the pipe chain driven box is fixedly connected to the top of the top cylinder, the outer wall of the top cylinder, the main pipe and the auxiliary pipe are provided with retaining ring grooves, and the top cylinder, the main pipe and the auxiliary pipe are all sealed and inserted into the inner side of the lower pipe clamp through the retaining ring grooves, the rear end of the bolts are threaded through the corner frame and connected in the thread groove, and the conveying pipe chain is arranged between the pipe chain drive box, the main pipe, the auxiliary pipe, the corner frame, the top cylinder and the pipe chain driven box.

[0008] In the above technical solution, further, an upper pipe clamp is fixedly connected to the rear side of the sealing plate relative to the position inside the through groove, and the upper pipe clamp is sealed and inserted into the inner side of the retaining ring groove.

[0009] In the above technical solution, the storage mechanism further includes a circular plate, which is slidably connected to the inner side of a cylinder. A circular ring plate is fixedly connected to the front side of the cylinder. A circular rod is fixedly connected to the side wall of each tooth. A right-angled plate with an inclined surface is fixedly connected to the bottom end of the circular plate relative to the upper position of the circular rod, and the inclined surface of the right-angled plate contacts the outer wall of the circular rod. A pressing seat is fixedly connected to the top end of the circular plate relative to the inner side of the circular ring plate. A roller is rotatably connected to the inner side of the pressing seat, and the pressing seat is located next to the center of the circular plate.

[0010] In the above technical solution, further, each of the bottom ends of the insert teeth is fixedly connected to a U-shaped block, and a storage spring is fixedly connected between the inner side of the U-shaped block and the inner wall of the cylinder, and a return spring is fixedly connected between the side wall of the circular plate and the side wall of the circular ring plate.

[0011] In the above technical solution, the ejection mechanism further includes pull ropes, four of which are provided. A top block is slidably connected to the inner side of each vertical groove. A pair of T-shaped blocks are fixedly connected to the bottom of the lower semi-circular hole frame. A guide roller is rotatably connected to the front end of the inner side of each vertical groove. The four pull ropes are fixedly connected to both sides of the T-shaped blocks. The other end of each pull rope passes through the front side of the guide roller and is fixedly connected to the side wall of the top block.

[0012] In the above technical solution, a pair of sealing grooves are provided on the side wall of the lower semi-circular hole frame, and upper sealing strips are fixedly connected to the side wall of the corner frame relative to the position inside the sealing grooves. A sealing block is fixedly connected to the rear side of the corner frame relative to the position inside the lower semi-circular hole frame.

[0013] In the above technical solution, the expansion mechanism further includes an L-shaped block and an L-shaped plate. The front side of the L-shaped block has a circular groove through it relative to the front side of the cylinder. The front sides of the L-shaped plate and the L-shaped block have slots through them relative to the front side of the threaded groove. A rectangular block is fixedly connected to the rear side of the L-shaped plate. An extrusion rod is provided inside the circular groove. A rectangular groove that matches the rectangular block is provided on the front side of the extrusion rod. Two pairs of vertical rods are fixedly connected to the rear side of the L-shaped block. A straight groove is through it on the front side of the L-shaped block. An upper semi-circular hole frame is fixedly connected to the rear side of the L-shaped plate relative to the position inside the straight groove.

[0014] During installation, first use the extrusion rod to extrude the storage mechanism, then install the L-shaped block on the conversion plate, then install the L-shaped plate and insert the rectangular block into the rectangular groove, and finally thread the bolt through the slot and connect it to the threaded groove.

[0015] In the above technical solution, straight pipe clamps are fixedly connected to both ends of the straight groove, and a pair of lower sealing strips are fixedly connected to the rear side of the upper semi-circular hole frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting up structures such as the ejection mechanism and the expansion mechanism, the end of the polyvinyl chloride resin conveying pipe is set in an L-shape. This allows it to be set vertically when not in use for expansion, without occupying too much production space. Moreover, when the production line is expanded later, the end of the conveying pipe can be quickly flipped over, and the chain remains a closed loop, eliminating the need for stopping operations such as chain cutting, splicing, and tensioning. This allows the conveying pipe to be extended later without disassembling the chain, and it can be used in two states with one machine.

[0018] 2. The present invention, through the setting of the storage mechanism, can not only guide the corner of the conveying pipe chain by means of the insert teeth and the cylinder when the tail of the conveying pipe is L-shaped, but also quickly retract multiple insert teeth when flipping and expanding, so as to avoid hindering the assembly of the upper and lower semi-circular hole frames and improve the stability of the conveying pipe during the conveying process. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the front of the conveying pipeline of the present invention;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the corner frame and sealing plate of the present invention.

[0021] Figure 3 This is a partial three-dimensional cross-sectional view of the conversion plate and side block of the present invention;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the L-shaped plate, L-shaped block, and conversion plate of the present invention.

[0023] Figure 5 This is a schematic diagram of the overall appearance structure of the L-shaped plate, L-shaped block, and conversion plate of the present invention;

[0024] Figure 6 This is a rear-view perspective view of the L-shaped plate structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of the L-shaped block, cylinder, and conveying pipe chain of the present invention.

[0026] Figure 8 This is a schematic diagram of the three-dimensional structure of the corner frame, conversion plate, and side block of the present invention.

[0027] Figure 9 This is a partial cross-sectional three-dimensional structural diagram of the lower semi-circular hole frame, the conveying pipe chain, and the side of the cylinder of the present invention.

[0028] Figure 10 Appendix of the present invention Figure 9 A magnified schematic diagram of the structure at point A in the middle.

[0029] In the diagram: 1. Pipe chain drive box; 2. Secondary pipe; 3. Conversion plate; 4. Corner frame; 5. Cylinder; 6. Insertion tooth; 7. Conveying pipe chain; 8. Side block; 9. Lower semi-circular hole frame; 10. Vertical groove; 11. Lower pipe clamp; 12. Top cylinder; 13. Clamping ring groove; 14. Sealing plate; 15. Bolt; 16. Upper pipe clamp; 17. Main pipe; 18. Circular plate; 19. Circular ring plate; 20. Circular rod; 21. Right angle plate; 22. Extrusion seat; 23. Roller; 24. U 25. Slotted block; 26. Storage spring; 27. Pull rope; 28. Top block; 29. ​​T-block; 30. Guide roller; 31. Sealing groove; 32. Upper sealing strip; 33. Block; 34. L-shaped block; 35. L-shaped plate; 36. Circular groove; 37. Rectangular block; 38. Extrusion rod; 39. Rectangular groove; 40. Vertical rod; 41. Straight pipe clamp; 42. Upper semi-circular hole frame; 43. Side pipe clamp; 44. Lower sealing strip; 45. Pipe chain driven box; 46. Return spring. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0032] In practical use, it has been found that existing tubular chain conveyors mostly adopt a rigid structure with fixed length and straight line. The conveying distance and feeding height are determined at the factory. When the production capacity of polyvinyl chloride resin powder is expanded or the process needs to be adjusted to extend the conveying section, users can only replace the entire tubular chain conveyor with a longer one or add a second piece of equipment. This results in the need to stop the machine to cut the chain, reconnect and tension it, which has a long construction period and high investment costs. The original equipment is then left idle. To solve the above problems, the following structure was invented.

[0033] like Figures 1-10The illustrated polyvinyl chloride resin anti-caking conveying pipeline includes a pipe chain drive box 1, a pipe chain driven box 44, and a conveying pipe chain 7, as well as a main pipe 17 and a secondary pipe 2 installed on the pipe chain drive box 1. The main pipe 17 is equipped with an inlet hopper and a discharge valve for feeding and discharging. Both the main pipe 17 and the secondary pipe 2 are equipped with a conversion plate 3 at their other ends. A side block 8 is fixedly connected to the bottom of the conversion plate 3 on the side away from the pipe chain drive box 1. Several threaded grooves are opened on the front side of the side block 8 and the conversion plate 3. A corner frame 4 is provided on the front side of the conversion plate 3, and a sealing plate 14 is provided on the front side of the corner frame 4. The front side of the sealing plate 14 is positioned through the threaded grooves. There is a bolt 15. A cylinder 5 is rotatably connected to the front side of the conversion plate 3. Several insert teeth 6 for transmitting the movement of the conveying pipe chain 7 are slidably connected through the outer wall of the cylinder 5. The cylinder 5 is provided with a storage mechanism for retracting the insert teeth 6. A groove is opened between the side block 8 and the front side of the conversion plate 3. A lower semi-circular hole frame 9 is slidably connected to the inside of the groove. A pair of vertical grooves 10 are opened on the front side of both the side block 8 and the conversion plate 3. The vertical grooves 10 are slidably connected to the inside of the groove. A side pipe clamp 42 is fixedly connected to the front side of the side block 8. A push-out mechanism for pushing out the lower semi-circular hole frame 9 is provided in the vertical groove 10. An expansion mechanism for horizontally installing the conveying pipe chain 7 is also provided.

[0034] The corner frame 4 has through slots on its side walls and top. The front side of the conversion plate 3 is fixedly connected to the lower pipe clamp 11 relative to the position inside the through slot. The top of the corner frame 4 is provided with a top cylinder 12 (it should be noted that the top cylinder 12 has a reserved opening for installing the discharge valve). The pipe chain driven box 44 is fixedly connected to the top of the top cylinder 12. The outer walls of the top cylinder 12, the main pipe 17 and the auxiliary pipe 2 are provided with retaining ring grooves 13 located inside the lower pipe clamp 11. The top cylinder 12, the main pipe 17 and the auxiliary pipe 2 are all sealed and inserted into the lower pipe clamp 11 through the retaining ring grooves 13. The rear ends of the bolts 15 pass through the corner frame 4 and are threaded into the threaded groove. The conveying pipe chain 7 is set between the pipe chain drive box 1, the main pipe 17, the auxiliary pipe 2, the corner frame 4, the top cylinder 12 and the pipe chain driven box 44.

[0035] An upper pipe clamp 16 is fixedly connected to the rear side of the sealing plate 14 relative to the position inside the through groove. The upper pipe clamp 16 is sealed and inserted into the inner side of the retaining ring groove 13.

[0036] The conveying pipe chain 7 is a continuous scraper chain. The pipe chain drive box 1 has a built-in motor, reducer, and sprocket. After being powered on, the drive sprocket meshes with the chain on the conveying pipe chain 7, providing traction force for the entire pipe chain. At the same time, a tension screw is provided, which can finely adjust the position of the sprocket to maintain appropriate chain tension. The chain is driven by the pipe chain drive box 1 to slide at low speed. The scrapers on the conveying pipe chain 7 push the material forward along the pipe wall. The feed port allows the powder to fall to the bottom of the pipe. When the chain passes by, it scrapes up the material and pushes it forward along the track. At the discharge port, the chain turns and the scraper unloads the material to complete the conveying. The pipeline is lined with a low-friction, anti-static lining and equipped with an online vibration or knocking device to promote the shedding of adhering material and achieve self-cleaning. There is no dust leakage from the entire pipeline. It can flexibly switch between multi-point feeding and multi-point discharging. It is suitable for long-distance, curved, closed-path conveying of powders that are easy to absorb moisture and easily clump.

[0037] After the polyvinyl chloride resin powder is conveyed into the equipment, the conveying chain 7 continues to move in the main pipe 17, and then moves to the corner frame 4. Under the guidance of the insert tooth 6 and the cylinder 5, it moves into the top cylinder 12 (at this time, it is under the tension of the chain driven box 44 that it moves into the top cylinder 12). The chain of the conveying chain 7 turns 180° in the chain driven box 44 to form a closed loop. The spring or oil cylinder in the box automatically compensates for the chain elongation to prevent tooth skipping and abnormal wear, and ensures the long-term stable conveying of polyvinyl chloride resin powder. Then the conveying chain 7 turns back to the chain drive box 1 through the secondary pipe 2. This process is repeated to realize the conveying of polyvinyl chloride resin powder.

[0038] In summary, by designing the above structure, the tail end of the polyvinyl chloride resin conveying pipeline is set in an L-shape, which allows it to be installed vertically without expanding its capacity, thus not occupying too much production space.

[0039] Based on the above embodiments, it was found during use that the above structure only reserved the top cylinder 12 as an expansion structure. However, during the conversion process, the insert teeth 6 on the cylinder 5 would affect the installation of the external pipe of the conveying pipe chain 7. In order to solve the above problem, the above structure was further improved.

[0040] The storage mechanism includes a circular plate 18, which is slidably connected to the inside of a cylinder 5. A circular ring plate 19 is fixedly connected to the front of the cylinder 5. A circular rod 20 is fixedly connected to the side wall of the insert tooth 6. A right-angle plate 21 with an inclined surface is fixedly connected to the bottom of the circular plate 18 relative to the position above the circular rod 20, and the inclined surface of the right-angle plate 21 contacts the outer wall of the circular rod 20. A pressing seat 22 is fixedly connected to the top of the circular plate 18 relative to the inner side of the circular ring plate 19. A roller 23 is rotatably connected to the inner side of the pressing seat 22. The pressing seat 22 is located next to the center of the circular plate 18.

[0041] U-shaped blocks 24 are fixedly connected to the bottom of each inserter 6. A storage spring 25 is fixedly connected between the inner side of the U-shaped block 24 and the inner wall of the cylinder 5. A return spring 45 is fixedly connected between the side wall of the circular plate 18 and the side wall of the circular ring plate 19.

[0042] The ejection mechanism includes pull ropes 26, of which four pull ropes 26 are provided. Top blocks 27 are slidably connected to the inner side of the vertical groove 10. A pair of T-shaped blocks 28 are fixedly connected to the bottom of the lower semi-circular hole frame 9. Guide rollers 29 are rotatably connected to the front end of the inner side of the vertical groove 10. The four pull ropes 26 are fixedly connected to both sides of the T-blocks 28. The other end of each pull rope 26 passes through the front side of the guide rollers 29 and is fixedly connected to the side wall of the top block 27.

[0043] A pair of sealing grooves 30 are provided on the side wall of the lower semi-circular hole frame 9. An upper sealing strip 31 is fixedly connected to the side wall of the corner frame 4 at a position relative to the inner position of the sealing groove 30. A sealing block 32 is fixedly connected to the rear side of the corner frame 4 at a position relative to the inner side of the lower semi-circular hole frame 9. By setting the upper sealing strip 31 and the sealing block 32, the sealing effect of the corner frame 4 on the lower semi-circular hole frame 9 can be ensured when the corner frame 4 is installed on the conversion plate 3, ensuring that the conversion plate 3 and the corner frame 4 are in a sealed state when combined, and ensuring the sealed conveying of polyvinyl chloride resin powder.

[0044] The expansion mechanism includes an L-shaped block 33 and an L-shaped plate 34. A circular groove 35 is provided through the front side of the L-shaped block 33 relative to the front side of the cylinder 5. Slots are provided on the front sides of both the L-shaped plate 34 and the L-shaped block 33 relative to the front side of the threaded groove. A rectangular block 36 is fixedly connected to the rear side of the L-shaped plate 34. An extrusion rod 37 is provided inside the circular groove 35. A rectangular groove 38 that matches the rectangular block 36 is provided on the front side of the extrusion rod 37. Two pairs of vertical rods 39 are fixedly connected to the rear side of the L-shaped block 33. A straight groove is provided through the front side of the L-shaped block 33. Straight pipe clamps 40 are fixedly connected to both ends of the straight groove. An upper semi-circular hole frame 41 is fixedly connected to the rear side of the L-shaped plate 34 relative to the position inside the straight groove. A pair of lower sealing strips 43 are fixedly connected to the rear side of the upper semi-circular hole frame 41.

[0045] During installation, first use the compression rod 37 to compress the storage mechanism, then install the L-shaped block 33 on the conversion plate 3, then install the L-shaped plate 34 and insert the rectangular block 36 into the rectangular groove 38, and then thread the bolt 15 through the slot and connect it to the threaded groove.

[0046] When it is necessary to extend the length of the polyvinyl chloride resin powder conveying pipeline, first remove the bolts 15 on the sealing plate 14 to release the limit on the sealing plate 14. Then remove the sealing plate 14 and the corner frame 4. At this time, the upper pipe clamp 16 will be pulled out from the retaining ring groove 13. Then the top cylinder 12 can be rotated, and the conveying pipe chain 7 will be rotated at the same time. Place the top cylinder 12 on the side pipe clamp 42 (at this time, the conveying pipe chain 7 is in a horizontal state). Then, first remove the extrusion rod 37 and insert it into the annular plate 19. At this time, the side end of the extrusion rod 37 will squeeze the roller 23 to push the extrusion seat 22 to move, thereby driving the circular plate 18 to slide into the cylinder 5. At the same time, the return spring 45 is stretched. During this process, the movement of the circular plate 18 will drive the movement of multiple right-angle plates 21. Since the inserter 6 can only slide on the cylinder 5, under the action of the movement of the right-angle plate 21, the inclined surface of the right-angle plate 21 will squeeze the arc surface of the circular rod 20 and push the inserter 6 to slide into the cylinder 5.

[0047] This process draws multiple insert teeth 6 into the cylinder 5, simultaneously moving the U-shaped block 24 and stretching the storage spring 25. Then, the L-shaped block 33 and L-shaped plate 34 are removed. The L-shaped block 33 is placed on the conversion plate 3 (at this point, the pressing rod 37 must be continuously pressed to prevent the insert teeth 6 from protruding and affecting the normal insertion of the L-shaped block 33). This causes the straight pipe clamp 40 to seal against the outer walls of the top cylinder 12 and the main pipe 17 (when installing another conversion plate 3, the straight pipe clamp 40 will seal against the outer walls of the top cylinder 12 and the secondary pipe 2), and the cylinder 5 is inserted... In the circular groove 35, during this process, multiple vertical rods 39 need to be inserted into the corresponding vertical grooves 10. Through the insertion of the vertical rods 39, the vertical rods 39 will push the top block 27 to move, and at the same time pull the pull rope 26 to move. At this time, under the guidance of the guide roller 29, the pull rope 26 will pull the T-shaped block 28 and the lower semi-circular hole frame 9 to slide in the groove, thereby sealing and engaging the inner side of the lower semi-circular hole frame 9 with the outer wall of the top cylinder 12 and the main pipe 17 (when installing another conversion plate 3, the inner side of the lower semi-circular hole frame 9 will be sealed and engaged on the outer wall of the top cylinder 12 and the secondary pipe 2).

[0048] Then, the L-shaped plate 34 can be placed on the L-shaped block 33, and the rectangular block 36 can be inserted into the corresponding rectangular groove 38. At the same time, the upper semi-circular hole frame 41 and the lower semi-circular hole frame 9 will be sealed together, thereby sealing the conveying pipe chain 7 between the upper semi-circular hole frame 41 and the lower semi-circular hole frame 9. At the same time, the lower sealing strip 43 will be inserted into the sealing groove 30 to ensure the sealing performance after the upper semi-circular hole frame 41 and the lower semi-circular hole frame 9 are connected. Finally, multiple bolts 15 can be inserted into the slot and threaded into the threaded hole on the conversion plate 3 to complete the rapid conversion of the conveying pipe. Then, the feed port of the polyvinyl chloride resin processing equipment can be connected to the reserved port on the top cylinder 12 for use.

[0049] Finally, it should be noted that when the components such as the conversion plate 3, corner frame 4, L-shaped block 33, sealing plate 14, upper pipe clamp 16, lower pipe clamp 11, side pipe clamp 42 and straight pipe clamp 40 are assembled, they are all equipped with sealing rings to ensure the sealing of the connection gaps, thereby ensuring the sealing effect of the conveying pipeline.

[0050] In summary, the above structural design allows for the rapid flipping of the tail section of the conveying pipeline during later production line expansions, while maintaining a closed chain. This eliminates the need for stoppages such as chain cutting, splicing, and tensioning, enabling the conveying pipeline to grow later without chain disassembly and allowing for two different machine states. Furthermore, when the tail of the conveying pipeline is L-shaped, the insert teeth 6 and cylinder 5 guide the corner of the conveying chain 7. During expansion, multiple insert teeth 6 can be quickly retracted to avoid obstructing the assembly of the upper semi-circular frame 41 and the lower semi-circular frame 9, thus improving the stability of the conveying pipeline during transport.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention.

[0052] Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A polyvinyl chloride resin anti-caking conveying pipe, comprising a pipe chain drive box (1), a pipe chain driven box (44), and a conveying pipe chain (7), and a main pipe (17) and a secondary pipe (2) disposed on the pipe chain drive box (1), characterized in that: Both the main pipe (17) and the auxiliary pipe (2) are provided with conversion plates (3) at their other ends. A side block (8) is fixedly connected to the bottom of the conversion plate (3) on the side away from the pipe chain drive box (1). Several threaded grooves are opened on the front side of the side block (8) and the conversion plate (3). A corner frame (4) is provided on the front side of the conversion plate (3). A sealing plate (14) is provided on the front side of the corner frame (4). Bolts (15) are provided through the front side of the sealing plate (14) relative to the front side of the threaded groove. A cylinder (5) is rotatably connected to the front side of the conversion plate (3). Several conveying pipes are slidably connected through the outer wall of the cylinder (5). The chain (7) moves the insert teeth (6), the cylinder (5) is provided with a storage mechanism for retracting the insert teeth (6), a groove is provided between the front side of the side block (8) and the conversion plate (3), a lower semi-circular hole frame (9) is slidably connected to the inner side of the groove, a pair of vertical grooves (10) are provided on the front side of both the side block (8) and the conversion plate (3), the vertical grooves (10) are connected to the inner side of the groove, a side pipe clamp (42) is fixedly connected to the front side of the side block (8), a pushing mechanism for pushing out the lower semi-circular hole frame (9) is provided in the vertical groove (10), and an expansion mechanism for horizontally installing the conveying pipe chain (7) is also provided; The storage mechanism includes a circular plate (18), which is slidably connected to the inside of a cylinder (5). A circular ring plate (19) is fixedly connected to the front side of the cylinder (5). A circular rod (20) is fixedly connected to the side wall of the insert (6). A right-angle plate (21) with an inclined surface is fixedly connected to the bottom end of the circular plate (18) relative to the position above the circular rod (20). The inclined surface of the right-angle plate (21) is in contact with the outer wall of the circular rod (20). A pressing seat (22) is fixedly connected to the top end of the circular plate (18) relative to the inner side of the circular ring plate (19). A roller (23) is rotatably connected to the inner side of the pressing seat (22). The pressing seat (22) is located next to the center of the circular plate (18). The launching mechanism includes pull ropes (26), four pull ropes (26) are provided, a top block (27) is slidably connected to the inner side of the vertical groove (10), a pair of T-shaped blocks (28) are fixedly connected to the bottom of the lower semi-circular hole frame (9), a guide roller (29) is rotatably connected to the front end of the inner side of the vertical groove (10), the four pull ropes (26) are fixedly connected to both sides of the T-shaped blocks (28), and the other end of the pull ropes (26) passes through the front side of the guide roller (29) and is fixedly connected to the side wall of the top block (27); The expansion mechanism includes an L-shaped block (33) and an L-shaped plate (34). A circular groove (35) is provided through the front side of the L-shaped block (33) relative to the front side of the cylinder (5). Slots are provided on the front sides of both the L-shaped plate (34) and the L-shaped block (33) relative to the front side of the threaded groove. A rectangular block (36) is fixedly connected to the rear side of the L-shaped plate (34). An extrusion rod (37) is provided inside the circular groove (35). A rectangular groove (38) that matches the rectangular block (36) is provided on the front side of the extrusion rod (37). Two pairs of vertical rods (39) are fixedly connected to the rear side of the L-shaped block (33). A straight groove is provided through the front side of the L-shaped block (33). An upper semi-circular hole frame (41) is fixedly connected to the rear side of the L-shaped plate (34) relative to the position inside the straight groove. During installation, first use the extrusion rod (37) to extrude the storage mechanism, then install the L-shaped block (33) on the conversion plate (3), then install the L-shaped plate (34) and insert the rectangular block (36) into the rectangular groove (38), and then thread the bolt (15) through the slot and connect it to the threaded groove. The corner frame (4) has through slots on its side walls and top. The front side of the conversion plate (3) is fixedly connected to the lower pipe clamp (11) relative to the position inside the through slot. The corner frame (4) has a top cylinder (12) at its top. The pipe chain driven box (44) is fixedly connected to the top of the top cylinder (12). The outer walls of the top cylinder (12), main pipe (17) and auxiliary pipe (2) are all provided with retaining ring grooves (13) located inside the lower pipe clamp (11). The top cylinder (12), main pipe (17) and auxiliary pipe (2) are all sealed and inserted into the lower pipe clamp (11) through the retaining ring grooves (13). The rear ends of the bolts (15) pass through the corner frame (4) and are threaded into the threaded groove. The conveying pipe chain (7) is set between the pipe chain drive box (1), main pipe (17), auxiliary pipe (2), corner frame (4), top cylinder (12) and pipe chain driven box (44). Each of the insert teeth (6) is fixedly connected to a U-shaped block (24), and a storage spring (25) is fixedly connected between the inner side of the U-shaped block (24) and the inner wall of the cylinder (5). A reset spring (45) is fixedly connected between the side wall of the circular plate (18) and the side wall of the circular ring plate (19).

2. The polyvinyl chloride resin anti-caking conveying pipe according to claim 1, characterized in that: The upper pipe clamp (16) is fixedly connected to the rear side of the sealing plate (14) relative to the position inside the through groove. The upper pipe clamp (16) is sealed and inserted into the inner side of the retaining ring groove (13).

3. The polyvinyl chloride resin anti-caking conveying pipe according to claim 1, characterized in that: The lower semicircular hole frame (9) has a pair of sealing grooves (30) on its side wall. The corner frame (4) is fixedly connected with an upper sealing strip (31) at a position relative to the sealing groove (30). The corner frame (4) is fixedly connected with a sealing block (32) at a position relative to the inner side of the lower semicircular hole frame (9).

4. The polyvinyl chloride resin anti-caking conveying pipe according to claim 1, characterized in that: Both ends of the straight groove are fixedly connected to straight pipe clamps (40), and a pair of lower sealing strips (43) are fixedly connected to the rear side of the upper semi-circular hole frame (41).

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