Molded pipe cooling device for polyethylene pipeline extrusion equipment

Abstract

The invention relates to the technical field of polyethylene pipeline cooling devices, in particular to a formed pipe cooling device for polyethylene pipeline extrusion equipment, which comprises a cooling box group, the cooling box group comprises a bedplate, support columns are mounted at four corners of the bottom end of the bedplate, a box body is mounted at the top end of the bedplate, and a pipe group is mounted in the box body. The pipe set comprises an annular pipe installed in the box body in a suspended mode, the bottom end of the annular pipe is connected with a water guide pipe, and the bottom end of the water guide pipe penetrates through the box body and then is in butt joint with the water outlet end of the water pump. By means of the spraying pieces designed at the front section of the flow dividing pipe at large intervals, the number of the spraying pieces is reduced, the total amount of cooling water sprayed out of the nozzle ends of the spraying pipes is reduced, the polyethylene pipe can be continuously cooled through the cooling water, the impact force of the cooling water on the surface of the just-formed polyethylene pipe is reduced, and the integrity of the surface of the polyethylene pipe is guaranteed; due to the design of the intensive spraying pieces on the rear section of the flow dividing pipe, the cooling effect on the polyethylene pipe subjected to primary cooling can be improved.

Description

Technical Field

[0001] This invention relates to the technical field of polyethylene pipe cooling devices, and more particularly to a cooling device for molded pipes used in polyethylene pipe extrusion equipment. Background Technology

[0002] Polyethylene pipe, or PE pipe for short, is mainly used for water supply pipes and gas pipes. PE resin is polymerized from ethylene monomers. Due to different polymerization reaction conditions such as pressure and temperature, resins of different densities can be obtained, hence the classifications of high-density polyethylene, medium-density polyethylene, and low-density polyethylene. Extrusion is one of the processing steps in polyethylene pipe manufacturing. During processing, hot-melt polyethylene pipe is extruded through a molding machine. After extrusion, the high-temperature polyethylene pipe needs to be cooled to prevent excessive deformation and dimensional deviations that could affect product quality. After the extruded material exits the mold, a new pipe is pulled out of the vacuum chamber using a traction pipe. The pipe, after exiting the shaping vacuum chamber, passes through a spray box for further cooling. Inside the spray box, cooling spray heads cool the polyethylene pipe. However, because the pipe has just undergone the shaping vacuum chamber forming process, its surface still retains residual heat, resulting in limited surface hardness. Traditional spraying uses direct spraying with a large number of nozzles. When the water pressure is high, the impact of the numerous nozzles creates pits and depressions on the surface, causing product defects, unnecessary losses, resource waste, and low product quality. Therefore, a cooling device for the formed pipe in polyethylene pipe extrusion equipment is needed to solve these problems. Summary of the Invention

[0003] The purpose of this invention is to solve the problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A cooling device for molded pipes in a polyethylene pipe extrusion machine includes a cooling box assembly. The cooling box assembly includes a platform, with supports installed at the four corners of the bottom of the platform. A box body is installed at the top of the platform, and a pipe assembly is installed inside the box body. The pipe assembly includes a ring pipe suspended inside the box body. A water guide pipe is connected to the bottom of the ring pipe, and the bottom of the water guide pipe passes through the box body and connects to the outlet of a water pump. Several branch pipes are connected around the inner wall of the ring pipe, and several spray elements are installed on the surface of the branch pipes. The platform can be raised and supported by the supports, so that the water pump can be placed on the support plate end surface of the supports. An inner groove surface is opened between the inner side of the platform and the box body to collect residual cooling water stains on the surface of the molded pipe.

[0005] Preferably, a water collection hopper is connected to the bottom of the housing, and a drain pipe is connected to the right side of the bottom of the water collection hopper. The end of the drain pipe is connected to the end of the water tank through a pipe, and the end of the drain pipe is connected to the water tank of the chiller through a water pipe. The outlet of one end of the water tank is connected to the inlet of the water pump, thereby facilitating the circulation of cooling water.

[0006] Preferably, the top edge of the water collection hopper has a groove, and a filter plate is embedded in the groove. The water collection hopper can collect the spray water in the tank. The groove design on the surface of the water collection hopper makes it easy to lay the filter plate flat.

[0007] Preferably, the box body has multiple observation windows equidistantly arranged on its sides, and a top cover is movably installed on one side of the top of the box body. The design of multiple observation windows allows for observation of the movement and cooling status of the polyethylene pipes inside the box body at any time, making it convenient to promptly detect and remove any damaged sections of the polyethylene pipes. The top cover design of the box body also allows for manual adjustment of the position of the supporting arc frame by the staff.

[0008] Preferably, the annular pipe is suspended and fixed to the left side of the inner wall of the box by a clamp. Two rows of hook plates are equidistantly arranged on the inner wall of the box, and the hook plates are hooked on the surface of the diversion pipe. The design of several hook plates can facilitate the hooking and support of the diversion pipe, reduce the wall hanging burden of the annular pipe, and ensure the stability of the diversion pipe during suspension.

[0009] Preferably, the spray elements are distributed at equal intervals from left to right, with the distance gradually decreasing. Each spray element includes two flexible hoses connected to the diversion pipe, and each of the two flexible hoses is connected to a movable pipe at its end. The movable pipe is connected and communicates with the spray pipe. The dual-nozzle design of the spray pipe increases the water spray volume in the latter half of the diversion pipe, thereby improving the cooling effect on the polyethylene pipe. The spray elements are installed with fewer on the left and more on the right, which can reduce the impact on the newly formed pipe that has not been fully cooled.

[0010] Preferably, the other end of the movable tube is provided with a rubber turntable end, and the rubber turntable end is movably installed on the side of the sleeve through a rotating groove. The bottom end of the spray pipe is provided with two nozzle ends. By rotating the movable tube in the rotating groove on the side of the sleeve, the spray pipe can be flipped left and right. The nozzle end design at the bottom of the spray pipe can improve the spraying effect.

[0011] Preferably, the sleeve is fitted onto the surface of the distribution pipe, and a locking bolt is inserted and installed at the top of the sleeve through a threaded hole. By rotating the sleeve on the surface of the distribution pipe, the forward and reverse tilt angles of the spray pipe can be changed, so that the nozzle end of the spray pipe can spray and cool the polyethylene pipe from different angles. By rotating and moving the locking bolt in the threaded hole of the sleeve, the shaft end of the locking bolt is controlled to abut and press against the surface of the distribution pipe, ensuring the stability of the sleeve after adjustment.

[0012] Preferably, the inner wall of the box is equipped with an anti-fall device, which includes several supporting arc frames. The supporting arc frames are connected by screws and a connecting plate is installed between them. Two side supports are symmetrically connected to both sides of each supporting arc frame, and the two sides of the side supports are embedded in the guide groove of the inner wall of the box. The vertical plate end of the side support is fixed to the inner wall of the guide groove of the box by screws. The supporting arc frames can provide auxiliary support for the polyethylene pipe, effectively preventing the polyethylene pipe that has not been fully cooled from falling in an elliptical manner when moving in the box, and ensuring the stability of the polyethylene pipe movement. After the supporting arc frames are adjusted, the side supports can be fixed in the guide groove of the inner wall of the box by screws to ensure the stability of the side supports after adjustment.

[0013] This invention has at least the following beneficial effects: 1. By setting up pipe assemblies and spray components, stable cooling of polyethylene pipes is achieved. Compared with traditional structures, this device reduces the number of spray components by using spray components with large intervals at the front of the diversion pipe, thereby reducing the total amount of cooling water sprayed from the nozzle end of the spray pipe. The cooling water can continuously cool the polyethylene pipe, reducing the impact force of the cooling water on the surface of the newly formed polyethylene pipe and ensuring the integrity of the polyethylene pipe surface. The dense spray component design at the rear of the diversion pipe can improve the cooling effect on the polyethylene pipe after initial cooling.

[0014] 2. By setting up pipe assemblies, the cooling effect of polyethylene pipes can be improved to a certain extent. This device is suspended and fixed to one side of the inner wall of the box by a ring pipe. Ten diversion pipes are set on the right side of the ring pipe, so that more spray elements can be arranged around the surface of the diversion pipes, effectively increasing the total number of spray elements. The increase in the total number of spray elements can increase the total number of spray pipe nozzles, thereby increasing the water flow and ensuring the cooling effect on polyethylene pipes.

[0015] 3. By setting up a sleeve, movable tube, and locking bolt, the spray angle of the water flow can be changed. This device changes the forward and reverse rotation angle of the spray pipe by rotating the sleeve on the surface of the diversion pipe. At the same time, the movable tube rotates in the rotating groove of the sleeve to change the angle of the spray pipe, thereby changing the left and right spray angle of the spray pipe. This allows the spray direction of the spray pipe to be adjusted at multiple angles. It can be adjusted according to the molding state of the polyethylene pipe, changing the impact force of the spray pipe nozzle end on the polyethylene pipe, and ensuring the quality of the polyethylene pipe after cooling.

[0016] 4. By setting anti-fall components, the molding pipe can be supported. The position of the side support frame in the guide groove on the inner wall of the box can be adjusted according to the diameter of the polyethylene pipe. This allows the support arc frame to support the polyethylene pipe while moving, reducing the probability of the polyethylene pipe falling in an elliptical shape when it passes through the cooling chamber. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the external structure of a cooling device for molded pipes used in polyethylene pipe extrusion equipment according to the present invention; Figure 2 This is a three-dimensional bottom view disassembly diagram of the cooling box assembly in a molding pipe cooling device for polyethylene pipe extrusion equipment proposed in this invention; Figure 3 This is a schematic diagram of the internal cross-sectional structure of the cooling box assembly in a molding pipe cooling device for polyethylene pipe extrusion equipment proposed in this invention; Figure 4 This is a three-dimensional structural diagram of an anti-fall component in a cooling device for molded pipes used in polyethylene pipe extrusion equipment, as proposed in this invention. Figure 5 This is a three-dimensional structural diagram of the pipe assembly in a molding pipe cooling device for polyethylene pipe extrusion equipment proposed in this invention; Figure 6 This is a three-dimensional structural diagram of the spray component in a cooling device for molded pipes used in a polyethylene pipe extrusion equipment according to the present invention. Figure 7 This is a three-dimensional disassembly diagram of the spray component in a cooling device for molded pipes used in polyethylene pipe extrusion equipment, as proposed in this invention.

[0019] In the diagram: 1. Cooling box assembly; 11. Platform; 12. Support column; 13. Box body; 14. Observation window; 15. Top cover; 16. Water collection hopper; 17. Filter plate; 18. Drain pipe; 19. Hook plate; 2. Fall arrestor; 21. Support arc frame; 22. Side support frame; 23. Connecting plate; 3. Pipe assembly; 31. Ring pipe; 32. Water guide pipe; 33. Water pump; 34. Diverter pipe; 4. Spray assembly; 41. Sleeve; 42. Movable pipe; 43. Spray pipe; 44. Hose; 45. Locking bolt. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] Reference Figure 1-7A cooling device for molding pipes in polyethylene pipe extrusion equipment includes a cooling box assembly 1. The cooling box assembly 1 includes a platform 11. Support columns 12 are installed at the four corners of the bottom end of the platform 11. A box body 13 is installed at the top end of the platform 11. A pipe assembly 3 is installed inside the box body 13. The pipe assembly 3 includes a ring pipe 31 suspended inside the box body 13. A water guide pipe 32 is connected to the bottom end of the ring pipe 31. The bottom end of the water guide pipe 32 passes through the box body 13 and connects to the outlet end of the water pump 33. A plurality of diversion pipes 34 are connected around the inner wall of the ring pipe 31. A plurality of spray elements 4 are installed on the surface of the diversion pipes 34.

[0022] The bottom of the tank 13 is connected to a water collection hopper 16, and the bottom right side of the water collection hopper 16 is connected to a drain pipe 18. The end of the drain pipe 18 is connected to the end of the water tank through a pipe.

[0023] A groove is provided on the top side of the water collection hopper 16, and a filter plate 17 is embedded in the groove.

[0024] Multiple observation windows 14 are equidistantly arranged on the sides of the enclosure 13, and a top cover 15 is movably installed on one side of the top of the enclosure 13.

[0025] The ring pipe 31 is suspended and fixed to the left side of the inner wall of the box 13 by a clamp. Two rows of hook plates 19 are equidistantly arranged on the inner wall of the box 13, and the hook plates 19 are hooked on the surface of the diversion pipe 34.

[0026] The spray elements 4 are distributed at equal intervals from left to right, with the distance gradually decreasing. Each spray element 4 includes two hoses 44 connected to the diversion pipe 34. The ends of the two hoses 44 are connected to movable pipes 42, and the ends of the movable pipes 42 are connected to and communicate with the spray pipes 43.

[0027] The other end of the movable pipe 42 is provided with a rubber turntable end, and the rubber turntable end is movably installed on the side of the sleeve 41 through the rotating groove. The bottom end of the spray pipe 43 is provided with two nozzle ends.

[0028] The sleeve 41 is fitted onto the surface of the diverter pipe 34, and a locking bolt 45 is inserted into the top of the sleeve 41 through a threaded hole.

[0029] The inner wall of the box 13 is equipped with a fall arrestor 2. The fall arrestor 2 includes several supporting arc frames 21. The supporting arc frames 21 are connected by screws and a connecting plate 23 is installed between them. Two side supports 22 are symmetrically connected on both sides of the supporting arc frame 21. The two sides of the side supports 22 are embedded in the guide groove of the inner wall of the box 13. The vertical plate end of the side support 22 is fixed to the inner wall of the guide groove of the box 13 by screws.

[0030] The support column 12 can raise and support the platform 11, allowing the water pump 33 to be placed on the end surface of the support plate 12. An inner groove is provided between the inner side of the platform 11 and the housing 13 to collect residual cooling water stains on the surface of the formed pipe. The design of several branch pipes 34 allows the polyethylene pipe to be wrapped around the inside of the housing 13. At this time, the spray nozzles 4 on the surface of the branch pipes 34 can spray and cool the surface of the polyethylene pipe from all sides. This is achieved through the bottom of the housing 13. A water collection hopper 16 is provided to facilitate the centralized accumulation of spray water. The end of the drain pipe 18 is connected to the water tank of the chiller via a water pipe. One end of the water tank outlet is connected to the water pump 33 inlet, thereby facilitating the circulation of cooling water. The water collection hopper 16 can collect the spray water in the box 13. The groove design on the surface of the water collection hopper 16 allows the filter plate 17 to be laid flat, and the filter plate 17 can effectively intercept and filter the spray water in the box 13.

[0031] The design of multiple observation windows 14 allows for real-time observation of the movement and cooling status of the polyethylene pipes inside the box 13, facilitating timely detection and removal of any damaged sections. The top cover 15 of the box 13 allows for manual adjustment of the position of the support arc frame 21 by staff. Since the box 13 is commonly used for the production of polyethylene pipes of the same diameter, secondary adjustments to the position of the support arc frame 21 are rarely required after initial adjustment. The design of several hook plates 19 facilitates the hooking and support of the diversion pipe 34, reducing the wall-mounted load on the ring pipe 31 and ensuring the stability of the diversion pipe 34 during suspension. The ring pipe 31 is clamped by clamps, with the outer side of the clamps fixed to the inner wall of the box 13 by bolts, thus achieving the suspension and fixation of the ring pipe 31.

[0032] The flexible design of the hose 44 facilitates the movement of the movable tube 42. The movable tube 42 is connected to the hose 44, allowing water to flow through easily. The water is guided through the movable tube 42 and then enters the spray pipe 43. The dual-nozzle design of the spray pipe 43 increases the water spray volume in the latter half of the diversion pipe 34, improving the cooling effect on the polyethylene pipe. The spray components 4 are installed with fewer nozzles on the left and more on the right, which reduces the impact on the newly formed and not fully cooled pipe, reducing the probability of dents and defects in the polyethylene pipe. The spray pipe 43 can be flipped left and right by rotating the movable tube 42 in the rotating groove on the side of the sleeve 41. The nozzle end design at the bottom of the spray pipe 43 improves the spraying effect. When the movable tube 42 rotates, the rubber turntable design on the side of the movable tube 42 increases the friction between the movable tube 42 and the rotating groove of the sleeve 41, preventing the spray pipe 43 from easily shaking after adjustment.

[0033] By rotating the sleeve 41 on the surface of the diversion pipe 34, the forward and reverse tilt angles of the spray pipe 43 can be changed, allowing the nozzles of the spray pipe 43 to spray and cool the polyethylene pipe from different angles. After the sleeve 41 is adjusted, the locking bolt 45 can be rotated and moved in the threaded hole of the sleeve 41, controlling the shaft end of the locking bolt 45 to abut and press against the surface of the diversion pipe 34, ensuring the stability of the sleeve 41 after adjustment. At the same time, since the hose 44 is a flexible structure, the sleeve 41 can be displaced a certain distance on the surface of the diversion pipe 34, improving the adjustability of the sleeve 41 on the surface of the diversion pipe 34. Multiple supports can be connected by the connecting plate 23. The arc frames 21 are connected to each other, ensuring that multiple supporting arc frames 21 are at the same horizontal height. The supporting arc frames 21 provide auxiliary support for the polyethylene pipe, effectively preventing the incompletely cooled polyethylene pipe from saging elliptically when moving within the housing 13, thus ensuring the stability of the polyethylene pipe's movement. Simultaneously, the side support frame 22 can move within the guide groove on the inner wall of the housing 13, changing the height of the supporting arc frame 21 to provide adaptive support for the polyethylene pipe. After the supporting arc frame 21 is adjusted, the side support frame 22 can be fixed in the guide groove on the inner wall of the housing 13 with screws, ensuring the stability of the adjusted side support frame 22. Working principle: According to the appendix Figure 5 Appendix Figure 6 With appendix Figure 7 As shown, the device consists of a water pump 33, a chiller, an extruder cooling water tank, a distribution pipe 34, a spray component 4, and a control unit. During operation, the cooling water drawn by the chiller is extracted through the water guide pipe 32, and then flows into the ring pipe 31. After the cooling water is diverted, it enters multiple distribution pipes 34, and the water in the distribution pipes 34 is diverted into the movable pipe 42 through the hose 44, so that the water flows into the spray pipe 43. The spray nozzle at the bottom of the spray pipe 43 sprays the surface of the polyethylene pipe to cool it down. After the water flows down, it is filtered by the filter plate 17. The filtered water flows back to the external water tank through the drain pipe 18 and the external pipe. During the return flow, it can also absorb the external heat generated by the machine operation. Secondly, according to the appendix Figure 3 With appendix Figure 4 As shown, after the extruded material comes out of the mold, a new tube is pulled out from the vacuum box by a traction tube. The tube after coming out of the shaping vacuum box passes through the inside of the box 13. Before use, the installation position of the side support 22 is adjusted so that the side support 22 moves in the guide groove on the inner wall of the box 13 and is fixed by screws. This allows the height of the support arc frame 21 to match the outer diameter of the pipe. Multiple support arc frames 21 can provide auxiliary support for the polyethylene pipe, reducing the probability of the polyethylene pipe falling elliptically. When cleaning the inside of the box 13, the top cover 15 can be rotated to open the top of the box 13, making it convenient for staff to clean or repair the inside of the box 13 after the work is finished.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. 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 principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A cooling device for molded pipes in a polyethylene pipe extrusion equipment, comprising a cooling box assembly (1), characterized in that, The cooling box assembly (1) includes a platform (11), with support columns (12) installed at the four corners of the bottom end of the platform (11), and a box body (13) installed at the top of the platform (11). A pipe assembly (3) is installed inside the box body (13). The pipe assembly (3) includes a ring pipe (31) suspended inside the box body (13). A water guide pipe (32) is connected to the bottom end of the ring pipe (31), and the bottom end of the water guide pipe (32) passes through the box body (13) and connects to the outlet end of the water pump (33). Several branch pipes (34) are connected around the inner wall of the ring pipe (31), and several spray elements (4) are installed on the surface of the branch pipes (34).

2. The cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 1, characterized in that, The bottom of the box (13) is connected to a water collection hopper (16), and the right side of the bottom of the water collection hopper (16) is connected to a drain pipe (18). The end of the drain pipe (18) is connected to the end of the water tank through a pipe.

3. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 2, characterized in that, The top edge of the water collection hopper (16) has a groove, and a filter plate (17) is embedded in the groove.

4. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 1, characterized in that, The box (13) has multiple observation windows (14) equidistantly arranged on its sides, and a top cover (15) is movably installed on one side of the top of the box (13).

5. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 1, characterized in that, The ring pipe (31) is suspended and fixed on the left side of the inner wall of the box (13) by a clamp. Two rows of hook plates (19) are equidistantly arranged on the inner wall of the box (13), and the hook plates (19) are hooked on the surface of the diversion pipe (34).

6. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 1, characterized in that, The spray elements (4) are distributed at equal intervals from left to right, with the distance gradually decreasing. Each spray element (4) includes two hoses (44) connected to the diversion pipe (34). The ends of the two hoses (44) are connected to a movable pipe (42), and the end of the movable pipe (42) is connected to the spray pipe (43).

7. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 6, characterized in that, The other end of the movable pipe (42) is provided with a rubber turntable end, and the rubber turntable end is movably installed on the side of the sleeve (41) through the turntable groove. The bottom end of the spray pipe (43) is provided with two nozzle ends.

8. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 7, characterized in that, The sleeve (41) is fitted onto the surface of the diverter pipe (34), and a locking bolt (45) is inserted into the top of the sleeve (41) through a threaded hole.

9. A cooling device for molded pipes in a polyethylene pipe extrusion equipment according to claim 1, characterized in that, The inner wall of the box (13) is equipped with a fall arrestor (2). The fall arrestor (2) includes several support arc frames (21). The several support arc frames (21) are connected by screws to install a connecting plate (23). The support arc frames (21) are symmetrically connected to two side supports (22) on both sides. The two sides of the side supports (22) are embedded in the guide groove of the inner wall of the box (13). The vertical plate end of the side support (22) is fixed to the inner wall of the guide groove of the box (13) by screws.

Images