Extrusion apparatus for double-walled corrugated pipes based on simultaneous rotary cooling

Abstract

The application discloses a double-wall corrugated pipe extrusion forming equipment based on synchronous rotary cooling, belongs to the field of corrugated pipe extrusion forming manufacturing, and adopts rotary air cooling combined with water cooling during movement to complete double cooling of the double-wall corrugated pipe, so that the double-wall corrugated pipe can be uniformly and distributedly cooled during and after forming. During the forming process, the cooling medium flow channel which is in contact with the pipe wall of the double-wall corrugated pipe is synchronously arranged in the corrugated forming half ring, so that sufficient heat exchange of the pipe blank of the double-wall corrugated pipe during the forming process is realized, and the pipe blank is uniformly cooled in all directions. After the forming, the intermittent butt joint mechanism is used to realize intermittent connection of the medium hose and the cooling medium flow channel in the corrugated forming half ring, realize 'follow-up cooling', and achieve the purpose of continuous cooling.

Description

Technical Field

[0001] This invention relates to the field of corrugated pipe extrusion molding manufacturing, and more specifically to a double-wall corrugated pipe extrusion molding equipment based on synchronous rotary cooling. Background Technology

[0002] Double-wall corrugated pipe forming is a pipe processing technology that involves simultaneously fusing two layers of pipe walls to form a corrugated outer wall and a smooth inner wall structure. The entire forming process requires simultaneous cooling to ensure accurate shaping of the double-wall corrugated pipe.

[0003] In the prior art, referring to the cooling device for HDPE double-wall corrugated pipe production disclosed in patent publication number CN118906424A, a cooling fan is used to perform rotary blowing cooling of the double-wall corrugated pipe during the molding process. Similarly, the double-wall corrugated pipe molding machine and its cooling device disclosed in patent publication number CN203713039U uses water cooling to complete atomized spray cooling after molding. After fully understanding the above two prior art documents, the following problems exist: On the one hand, cooling intervention during the tube forming process is limited because the forming mold travels periodically on the track, making it difficult for external pipelines to form a rigid connection to complete heat exchange. On the other hand, air cooling and water cooling are difficult to complement each other. Air cooling medium is difficult to remove high heat loads quickly on its own, and if water cooling medium is directly sprayed onto the surface of the tube blank during the forming process, it is very easy to cause damage to the corrugated shape.

[0004] Therefore, a solution is proposed. Summary of the Invention

[0005] The purpose of this invention is to propose a double-wall corrugated pipe extrusion molding equipment based on synchronous rotary cooling. A circulating cooling channel that fits the pipe wall contour is integrated inside the corrugated molding semi-ring, and combined with a follow-up intermittent docking water supply mechanism to achieve synchronous water cooling during molding. At the same time, a circumferential rotary gas-liquid convection device is set on the rear side of molding to complete secondary enhanced cooling.

[0006] The present invention provides the following apparatus: a double-wall corrugated pipe extrusion molding equipment based on synchronous rotary cooling, including a corrugated forming half-ring arranged on opposing tracks and a rotary double-spray assembly covering the rear side of the pipe body after forming in the direction of travel. The corrugated forming half-ring has a cooling channel parallel to the compressed air channel and sealing valves are embedded on both sides. The follow-up circulating cooling component is equipped with a docking circulating cooling state and a disconnection reset waiting state. It includes fixed rod seats horizontally set on both sides of the opposing track. The fixed rod seats are connected to the middle of the outer side of the opposing track through an intermittent docking mechanism. The output end of the medium hose is connected to a suction and infusion head that extends through the sealing valve and into the corrugated semi-ring. The rotary dual-jet assembly includes a bottom box and a jet box surrounding the outside of the formed tube body. An annular channel is formed between the bottom box and the inside of the jet box. Symmetrically distributed tangential nozzles are installed on the top of the bottom box, and a blower pipe is installed on the inner top of the jet box in a symmetrical arrangement with the tangential nozzles. The tangential nozzles and the blower pipe flow in opposite directions within the annular channel. The intermittent docking mechanism includes an electric push rod horizontally installed in the middle of the outer side of the fixed rod seat. The output end of the electric push rod is connected in the opposite direction to several push rods that pass through the fixed rod seat and are connected to the media hose. A rigid sleeve is provided at the contact part between the media hose and the push rod. The front end of the rigid sleeve is connected to the suction and infusion head. The suction and infusion head is fitted with a sealing ring that matches the outer wall of the corrugated semi-ring.

[0007] Furthermore, the output end of the electric push rod faces outward and is connected to a drive rod. The inner end of the drive rod is connected in the opposite direction to a connecting frame connected to the push rod. The medium hose is connected to a suction pump or an axial flow pump. Both the suction pump and the axial flow pump are installed in the cooling water tank, which is used to pump the cooling water in the cooling water tank to the corrugated semi-ring or to draw the heat-absorbing cooling water in the corrugated semi-ring to the cooling water tank.

[0008] Furthermore, a fan is installed on the top of the jet box, and the exhaust end of the fan extends into the jet box and is connected to the blower pipe. A cooling medium storage chamber is provided in the bottom box, and a liquid collection hole for cooling medium circulation and recovery is opened in the upper middle part of the bottom box.

[0009] Furthermore, air guide wedges are installed on both sides of the upper end of the jet box corresponding to the bottom box. The blower pipe is guided by the air force of the air guide wedges to form convection with the cooling medium sprayed from the tangential nozzle.

[0010] Furthermore, a conveying channel is installed on the rear side of the bottom box corresponding to the conveying direction of the formed pipe body, for horizontal conveying of the formed pipe body.

[0011] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention employs a combination of rotary air cooling and in-process water cooling to achieve dual cooling of the double-walled corrugated pipe. This ensures that the double-walled corrugated pipe receives uniform and distributed cooling both during and after forming. During the forming process, cooling medium channels that are in contact with the pipe wall are simultaneously set in the corrugated forming semi-ring. The circulating cooling medium ensures sufficient heat exchange during the forming process of the double-walled corrugated pipe blank. Furthermore, the symmetrically set circulating cooling channels can achieve uniform cooling of the formed pipe blank from all directions.

[0012] "Follow-up cooling" is achieved by using an intermittent docking method. The intermittent docking mechanism enables intermittent connection between the medium hose and the cooling medium flow channel inside the corrugated semi-ring. Under the intermittent opening and closing of the sealing valve on the corrugated semi-ring, combined with the radial reciprocating movement of the suction and injection head driven by the electric push rod, the intermittent suction and injection of cooling water is completed, achieving the purpose of continuous cooling.

[0013] Furthermore, after molding, a rotating double-spray assembly is installed on the outside of the double-wall corrugated pipe body. Utilizing the convection effect of airflow and water flow, the double-wall corrugated pipe is sprayed around its entire circumference after molding, achieving the purpose of cooling the double-wall corrugated pipe again after molding. This effectively improves the molding accuracy and avoids the phenomenon of uneven cooling of the pipe after molding caused by concentrated spray points.

[0014] By combining the intelligent temperature control system, the cooling effect during the extrusion molding process of double-wall corrugated pipes can be monitored and dynamically controlled in real time, so as to achieve the purpose of dynamically adjusting the cooling parameters according to the actual heat load. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a rear view of the overall structure of the present invention; Figure 3 This is an exploded view of the installation structure of the follow-up circulating cooling assembly of the present invention; Figure 4 This is an installation diagram of the intermittent docking mechanism of the present invention; Figure 5 This is a cross-sectional view of the mounting structure of the follow-up circulating cooling assembly of the present invention; Figure 6 This is an installation diagram of the rotary dual-jet assembly of the present invention; Figure 7 This is a cross-sectional view of the rotary dual-jet assembly of the present invention.

[0016] In the diagram: 1. Opposing track; 2. Corrugated semi-ring; 3. Base box; 4. Jet box; 5. Fan; 6. Pipe body; 7. Conveying channel; 8. Fixed rod seat; 9. Electric push rod; 10. Drive rod; 11. Suction and infusion head; 12. Medium hose; 13. Sealing valve; 14. Connecting frame; 15. Push rod; 16. Rigid sleeve; 17. Variable diameter channel; 18. Fitting sealing ring; 19. Variable diameter inner cylinder; 20. Tangential nozzle; 21. Liquid collection hole; 22. Air guide wedge; 23. Blower pipe. Detailed Implementation

[0017] 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 embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are only used to explain this invention and are not intended to limit this invention.

[0018] Example 1: Refer to Figures 1-7 As shown, this invention discloses a double-walled corrugated pipe extrusion molding equipment based on synchronous rotary cooling, which consists of three main parts: opposing tracks 1 and corrugated forming semi-ring 2 in the forming section, a side-mounted follow-up circulating cooling assembly, and a rear-mounted rotary dual-spray assembly. In addition to a conventional compressed air channel, the corrugated forming semi-ring 2 also has a coolant channel conforming to the corrugated profile, and the channel ports are sealed by elastic sealing valves 13. The specific details are as follows: It includes a corrugated semi-ring 2 set on the opposing track 1 and a rotary double-spray assembly covering the rear side of the tube body 6 after it is formed and travels in the direction of travel. The corrugated semi-ring 2 has a cooling channel parallel to the compressed air channel and sealing valves 13 are embedded on both sides. The follow-up circulating cooling assembly includes fixed rod seats 8 horizontally arranged on both sides of the opposing track 1. The fixed rod seats 8 are horizontally installed with a medium hose 12 through an intermittent docking mechanism in the middle of the outer side of the opposing track 1. The output end of the medium hose 12 is connected to a suction and infusion head 11 that extends through the sealing valve 13 and into the corrugated semi-ring 2. The rotary dual-jet assembly includes a base box 3 and a jet box 4 surrounding the outside of the formed tube body 6. The interior of the base box 3 and the jet box 4 forms an annular channel. The top of the base box 3 is equipped with symmetrically distributed tangential nozzles 20. The top of the jet box 4 is equipped with a blower pipe 23 that is symmetrically distributed with respect to the tangential nozzles 20. The tangential nozzles 20 and the blower pipe 23 form a relative flow direction in the annular channel.

[0019] Reference Figure 6 and Figure 7 As shown, the convection cooling principle of the rotary double-spray assembly is as follows: the airflow output from the blower pipe 23 and the cooling medium sprayed from the tangential nozzle 20 form convection in the annular channel. Under this convection, the cooling medium is dispersed and evenly carried by the airflow, and distributed circumferentially on the outer wall surface of the pipe body 6 along the annular channel, realizing full-circumferential spray cooling of the formed double-wall corrugated pipe. The cooled medium is collected to the bottom of the bottom box 3 under the action of gravity and recycled to the cooling medium storage cavity through the liquid collection hole 21, realizing recycling.

[0020] The intermittent docking mechanism includes an electric push rod 9 horizontally installed in the middle of the outer side of the fixed rod seat 8. The output end of the electric push rod 9 faces outward and is connected to a drive rod 10. The inner end of the drive rod 10 is connected to a connecting frame 14 in the opposite direction. The connecting frame 14 is connected to several push rods 15 that pass through the fixed rod seat 8 and are connected to the medium hose 12. A rigid sleeve 16 is provided at the contact part between the medium hose 12 and the push rod 15. The front end of the rigid sleeve 16 is connected to the suction and infusion head 11. The suction and infusion head 11 is fitted with a sealing ring 18 that matches the outer wall of the corrugated semi-ring 2. Reference Figures 3-5 As shown, the motion principle of the follow-up cooling achieved by the intermittent docking mechanism is as follows: After the double-walled corrugated pipe completes one forming cycle in the corrugated forming half-ring 2, the electric push rod 9 is started to drive the suction and delivery head 11 to penetrate into the sealing valve 13 to open it. At this time, the suction and delivery head 11 passes through the opened sealing valve 13 and enters the interior of the corrugated forming half-ring 2, and docks and connects with the preset cooling flow channel in the corrugated forming half-ring 2. A suction pump pumps cooling water from the cooling water tank to the cooling channel of the corrugated semi-ring 2. The cooling water circulates along the channel, fully exchanging heat with the tube blank during molding. After the heat exchange is completed, an axial flow pump starts, drawing the cooled water that has absorbed heat in the corrugated semi-ring 2 back to the cooling water tank. The flow path of the cooling water in the corrugated semi-ring 2 is in contact with the tube wall of the double-walled corrugated pipe, achieving uniform heat exchange. After cooling is completed, the electric push rod 9 moves in the opposite direction, the suction and injection head 11 exits from the sealing valve 13, and the sealing valve 13 closes, completing a complete follow-up cooling cycle. This process is repeated to achieve intermittent follow-up cooling synchronized with the mold closing and opening actions of the corrugated semi-ring 2.

[0021] It should be noted that the operation cycle of the intermittent docking mechanism is synchronously locked with the mold closing / opening cycle of the corrugated forming half-ring 2. When the double-walled corrugated pipe completes the mold closing in the corrugated forming half-ring 2 (i.e., the first moment when the pipe blank is compressed and shaped), the electric push rod 9 is immediately started, driving the suction and injection head 11 to penetrate into the sealing valve 13 and make it elastically open. The suction and injection head 11 passes through the opened sealing valve 13 and enters the interior of the corrugated forming half-ring 2, and docks and connects with the preset cooling channel in the corrugated forming half-ring 2. At this time, the cooling water enters the cooling channel of the corrugated forming half-ring 2 through the medium hose 12, the rigid sleeve 16, and the suction and injection head 11, and circulates along the channel that fits the corrugated shape of the pipe wall, and performs forced convection heat exchange with the forming pipe blank. Once the heat exchange is complete (corresponding to the pressure holding and shaping time window of the corrugated semi-ring 2), the suction pump starts to draw back the cooled water after heat absorption. Then, the electric push rod 9 moves in the opposite direction, and the suction and injection head 11 exits from the sealing valve 13. The sealing valve 13 passively closes due to its own elasticity, completing a complete follow-up cooling cycle. During this process, the sealing valve 13 simultaneously serves as both a "one-way valve" and a "leakage-proof seal." That is, it passively opens and provides a guiding channel when the suction and injection head 11 is inserted, and automatically closes due to its elastic restoring force after the suction and injection head 11 is withdrawn, blocking the leakage path of the cooling medium.

[0022] The basic implementation principle of this embodiment is as follows: During the molding process, a cooling medium flow channel that is in contact with the wall of the double-walled corrugated pipe is simultaneously set in the corrugated molding half-ring 2. The circulating cooling medium flow direction realizes the dynamic heat exchange during the molding process of the double-walled corrugated pipe blank. The symmetrically set circulating cooling channels can realize the uniform cooling of the molded pipe blank in all directions. The intermittent connection mechanism realizes the intermittent connection between the medium hose and the cooling medium flow channel in the corrugated molding half-ring. Under the intermittent opening and closing of the sealing valve on the corrugated molding half-ring, combined with the radial reciprocating movement of the suction and injection head driven by the electric push rod, the intermittent suction and injection of cooling water is completed to achieve the purpose of continuous cooling. In addition, after molding, the convection effect of airflow and water flow is used to achieve full circumferential spraying of the molded double-wall corrugated pipe, thereby achieving the purpose of cooling the double-wall corrugated pipe again after molding, effectively improving its molding accuracy and avoiding the phenomenon of uneven cooling of the pipe after molding caused by concentrated spray points; the key is: the intervention of follow-up water cooling during the molding process, and the use of a combination of water cooling and air cooling to complete the dual cooling of the double-wall corrugated pipe after molding.

[0023] Example 2: Based on Example 1 above, this example provides a detailed explanation of the processing procedure of the intelligent temperature control system for the follow-up circulating cooling component: The intelligent temperature control system includes a processor, a temperature detection module, a displacement detection module, a flow detection module, a distribution analysis module, and a drive module; Temperature sensors (not shown in the figure) are installed at the connection between the medium hose 12 and the suction / injection head 11, and at the junction of the suction / injection head 11 and the cooling channel, respectively. These sensors are used to monitor the cooling water temperature at the inlet and outlet in real time. The temperature detection module will collect the real-time temperature data. and The data is sent to the allocation and analysis module via the processor. An encoder (not shown in the figure) is installed on the opposing track 1 to measure the displacement of the corrugated semi-ring 2 on the track in real time. The displacement detection module sends the real-time displacement L to the allocation and analysis module via the processor. A flow sensor (not shown in the figure) is installed inside the medium hose 12 or the rigid sleeve 16 to sense the flow rate of the cooling water in real time. The flow detection module sends the real-time flow value Q to the distribution analysis module via the processor; The allocation and analysis module receives real-time temperature data. and When calculating the real-time displacement L and real-time flow rate Q, the temperature difference is calculated first. = Construct a formula for calculating the cooling regulation coefficient K. ; Among them Indicates the preset reference temperature difference. This represents the standard travel displacement of the corrugated semi-ring 2 in a single forming cycle. This indicates the standard flow rate value of the cooling channel; when > At this time, a negative feedback adjustment signal is generated, indicating that the heat exchange in the cooling channel is insufficient or the cooling water flow is insufficient. The negative feedback adjustment signal is sent to the drive module. When the drive module receives the negative feedback adjustment signal, it performs the following actions: controls the suction pump to increase the output power to increase the cooling water flow and velocity, and controls the electric push rod 9 to drive the suction and injection head 11 to advance into the depth of the cooling channel to increase the insertion depth, so that the cooling water can flow more fully through each area of ​​the cooling channel and have sufficient heat exchange with the tube blank.

[0024] when ≤ At this time, a positive feedback adjustment signal is generated, indicating that the heat exchange in the cooling channel is sufficient and the cooling water flow is normal. The positive feedback adjustment signal is sent to the drive module, and the drive module does not perform any action.

[0025] It should be noted that the adjustment cycle of the intelligent temperature control system is synchronously locked with the mold closing / opening cycle of the corrugated semi-ring 2. After the corrugated semi-ring 2 completes mold closing, the temperature detection module, displacement detection module, and flow detection module begin to collect data in real time. The allocation and analysis module completes the calculation and judgment of the cooling control coefficient once in each control cycle to ensure the timing match between the cooling control action and the molding action.

[0026] Furthermore, when > When the duration exceeds the preset time threshold, it indicates that water cooling alone is insufficient to meet the cooling requirements of the current molding cycle. The drive module simultaneously controls the fan 5 to increase its output airflow, using the rotary dual-jet assembly to provide auxiliary cooling to the molded tube 6, thus achieving coordinated control of water cooling and air cooling; until... ≤ The fan 5 will be restored to its initial output state.

[0027] Example 3: Refer to Figures 1-7 This embodiment is a structural improvement on embodiment one, including a variable diameter inner cylinder 19 inserted inside the rigid sleeve 16, and a variable diameter channel 17 opened inside the variable diameter inner cylinder 19, wherein the inner diameter of the variable diameter channel 17 first decreases and then increases along the direction of cooling water flow.

[0028] It should be noted that: a fan 5 is installed on the top of the jet box 4, and the exhaust end of the fan 5 extends into the jet box 4 and is connected to the blower pipe 23. A cooling medium storage chamber is provided in the bottom box 3, and a liquid collection hole 21 for cooling medium circulation and recovery is opened in the upper middle part of the bottom box 3. A suction pump is also provided in the cooling medium storage chamber in the bottom box 3. The suction pump draws the cooling medium in the cooling medium storage chamber to the tangential nozzle 20, and the tangential nozzle 20 completes the blowing in the annular channel.

[0029] Air guide wedges 22 are installed on both sides of the upper end of the jet box 4 corresponding to the bottom box 3. The blower pipe 23 is guided by the air force of the air guide wedges 22 and forms convection with the cooling medium sprayed out by the tangential nozzle 20.

[0030] With the setting of the air guide wedge 22, the blower pipe 23 forms convection with the cooling medium sprayed from the tangential nozzle 20 through the air force guidance of the air guide wedge 22. The air guide wedge 22 directionally guides the airflow output from the blower pipe 23 to form a tangential component. This tangential component causes the airflow to form a rotating motion trajectory in the annular channel, forming a stable counter-turbulent flow field with the spray direction of the cooling medium sprayed from the tangential nozzle 20. This counter-turbulent flow field generates strong shear force near the outer wall surface of the pipe body 6, breaking the cooling medium into micron-sized droplets, so that it forms a counter-turbulent flow with the cooling medium sprayed from the tangential nozzle 20 near the outer wall surface of the pipe body 6, increasing the contact area between the gas and liquid phases, and realizing full-circumferential spray cooling of the formed double-walled corrugated pipe.

[0031] It is also provided that: a conveying channel 7 is installed on the rear side of the bottom box 3 corresponding to the conveying direction of the tube body 6 after it is formed. The conveying channel 7 is matched with the tube body 6 and is provided with guide rollers for horizontal conveying of the tube body 6. The guide rollers are not shown in the figure. Preferably, they are guide conveying rollers that match the corrugations of the double-wall corrugated pipe to realize conveying and feeding.

[0032] In summary, a dual strategy of "in-process water cooling" and "post-forming gas-liquid convection cooling" is employed to achieve uniform cooling throughout the entire process of double-wall corrugated pipe production, overcoming the limitations of existing technologies such as restricted cooling intervention, single cooling method, and uneven cooling. Furthermore, the intelligent temperature control system enables real-time monitoring and dynamic regulation of the cooling effect during the extrusion molding process of double-wall corrugated pipe, achieving the goal of dynamically adjusting cooling parameters according to the actual heat load.

[0033] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A double-wall corrugated pipe extrusion molding equipment based on synchronous rotary cooling, comprising a follow-up circulating cooling assembly, characterized in that: The follow-up circulating cooling component is connected to an intelligent temperature control system, which includes a processor, a temperature detection module, a displacement detection module, a flow detection module, a distribution analysis module, and a drive module. The temperature detection module is used to collect the real-time temperature of the inlet and outlet of the cooling channel, which are marked as and , respectively, and the real-time temperature is sent to the mixing and analysis module via the processor. The displacement detection module is used to collect the real-time travel displacement L of the follow-up circulating cooling component, and send the real-time travel displacement L to the allocation and analysis module via the processor; The flow detection module is used to collect the real-time flow value Q of the cooling water in the cooling channel, and send the real-time flow value Q to the allocation and analysis module via the processor; The allocation and analysis module combines the received real-time temperature, real-time travel displacement L, and real-time flow rate Q to form a cooling control coefficient K. Based on the comparison and analysis between the cooling control coefficient K and the preset cooling control coefficient threshold, positive feedback control signals and negative feedback control signals are generated and sent to the drive module to execute relevant actions.

2. The twin-wall corrugated pipe extrusion apparatus based on synchronous rotary cooling according to claim 1, characterized in that, It also includes a corrugated semi-ring (2) set on the opposing track (1), the corrugated semi-ring (2) having a cooling channel parallel to the compressed air channel and sealing valves (13) embedded on both sides. The follow-up circulating cooling assembly also includes a fixed rod seat (8) horizontally arranged on both sides of the opposing track (1). The fixed rod seat (8) is connected to the middle of the outer side of the opposing track (1) by an intermittent docking mechanism and a medium hose (12) is installed horizontally. The output end of the medium hose (12) is connected to a suction and infusion head (11) that extends through the sealing valve (13) into the corrugated semi-ring (2).

3. The twin-wall corrugated pipe extrusion apparatus based on synchronous rotary cooling according to claim 2, characterized in that, It is also provided with: a rotary double spray assembly including a bottom box (3) and a jet box (4) surrounding the outside of the formed tube body (6), wherein the bottom box (3) and the jet box (4) form an annular channel, the bottom box (3) is equipped with symmetrically distributed tangential nozzles (20) on the top, and the jet box (4) is equipped with a blower pipe (23) symmetrically distributed with respect to the tangential nozzles (20) at the top inner end, and the tangential nozzles (20) and the blower pipe (23) flow in opposite directions in the annular channel.

4. The twin-wall corrugated pipe extrusion apparatus based on synchronous rotary cooling according to claim 3, characterized in that, The intermittent docking mechanism includes an electric push rod (9) horizontally installed in the middle of the outer side of the fixed rod seat (8). The output end of the electric push rod (9) is connected in the opposite direction to several push rods (15) that pass through the fixed rod seat (8) and connect to the medium hose (12). A hard sleeve (16) is provided at the contact part between the medium hose (12) and the push rod (15). The front end of the hard sleeve (16) is connected to the suction and infusion head (11). The suction and infusion head (11) is fitted with a sealing ring (18) that matches the outer wall of the corrugated semi-ring (2).

5. The double-wall corrugated pipe extrusion molding equipment based on synchronous rotary cooling according to claim 4, characterized in that, The output end of the electric push rod (9) faces outward and is connected to the drive rod (10). The inner end of the drive rod (10) is connected to the connecting frame (14) connected to the push rod (15). The medium hose (12) is connected to the suction pump or the axial flow pump. Both the suction pump and the axial flow pump are installed in the cooling water tank to pump the cooling water in the cooling water tank to the corrugated half ring (2) or to draw the heat-absorbing cooling water in the corrugated half ring (2) into the cooling water tank.

6. The double-wall corrugated pipe extrusion molding equipment based on synchronous rotary cooling according to claim 5, characterized in that, A fan (5) is installed on the top of the jet box (4). The exhaust end of the fan (5) extends into the jet box (4) and is connected to the blower pipe (23). A cooling medium storage chamber is provided in the bottom box (3). A liquid collection hole (21) for cooling medium circulation and recovery is opened in the upper middle part of the bottom box (3). Air guide wedges (22) are installed on both sides of the jet box (4) corresponding to the upper end of the bottom box (3). The blower pipe (23) forms convection with the cooling medium sprayed by the tangential nozzle (20) through the air force guidance of the air guide wedges (22).

7. The double-wall corrugated pipe extrusion molding equipment based on synchronous rotary cooling according to claim 1, characterized in that, The temperature detection module acquires the real-time temperature of the inlet end of the cooling channel of the corrugated semi-ring (2). and the real-time temperature at the liquid outlet Calculate the temperature difference = The displacement detection module obtains the real-time travel displacement L of the corrugated semi-ring (2), which is measured by the encoder set on the opposing track (1); the flow detection module obtains the real-time flow value Q of the cooling water in the cooling channel, which is measured by the flow sensor set in the medium hose (12); Construct a formula for calculating the cooling regulation coefficient K. , among them Indicates the preset reference temperature difference. This indicates the standard travel displacement of the corrugated semi-ring (2) in a single forming cycle. This indicates the standard flow rate value of the cooling channel.

8. The double-wall corrugated pipe extrusion molding equipment based on synchronous rotary cooling according to claim 7, characterized in that, The comprehensive analysis process of the allocation analysis module is as follows: The allocation analysis module receives the real-time temperature... and When the real-time travel displacement L and real-time flow rate Q are known, the cooling control coefficient K is calculated according to the formula. when > At that time, among them To preset the cooling control coefficient threshold, a negative feedback adjustment signal is generated at this time; when ≤ At this time, a positive feedback adjustment signal is generated, and both the negative feedback adjustment signal and the positive feedback adjustment signal are sent to the drive module to execute the relevant actions.

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