Spiral pipe bending device

Abstract

The invention discloses a spiral pipe bending device, and relates to the technical field of spiral pipe bending machining. The device comprises a rotatable hollow pipe bending tire membrane, and a steel pipe is wound around the outer wall of the hollow pipe bending tire membrane. In order to solve the problem of thermal expansion caused by the fact that a high-temperature steel pipe heats the tire film, cooling water is introduced into the tire film, a cooling channel and a heat dissipation mechanism are arranged, the cooling channel comprises a flow guide cavity, cooling fins and a cooling fan driven by a motor, and an efficient cooling circulation system is formed. And meanwhile, an auxiliary pressure relief channel and a pressure relief valve plate are arranged, so that overpressure damage caused by blockage of the cooling channel is prevented. According to the device, a steel pipe is prevented from being separated from a tire film by using a bolt in the pipe bending process, and a limiting shell is additionally arranged after forming, so that deformation caused by residual stress is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of spiral pipe bending processing, in particular to a spiral pipe bending device. Background Art

[0002] The traditional spiral bending process causes the high-temperature steel pipe to transfer heat to the mold during the winding process, causing the mold to expand thermally and increase in diameter, ultimately making the actual diameter of the spiral pipe exceed expectations and unable to meet strict dimensional requirements. Traditional equipment usually lacks an effective mold cooling system, and the mold temperature continues to rise during operation, which not only exacerbates the thermal expansion problem, but may also cause equipment damage or shorten its service life. At the same time, the prior art does not set up a safety protection mechanism for the overpressure problem caused by the blockage of the cooling channel, which increases the risk of equipment operation. In addition, the traditional method fails to effectively solve the problems of residual stress rebound and ring separation after bending. The steel pipe after bending may deform during the cooling process, affecting the shape and structural integrity of the product. This requires additional processing steps, increasing production costs and scrap rates. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a spiral pipe bending device, comprising a hydraulic box, a hydraulic gearbox, an adjustable height fixed box, a base frame, a movable guide rail, a guide rail bracket, a pipe bending membrane, a membrane bracket and fixing bolts; the hydraulic box and the hydraulic gearbox are matched with hydraulic pipes that match each other; the hydraulic gearbox is installed on the adjustable height fixed box; the adjustable height fixed box is installed on the base frame, and the guide rail bracket is installed on the base frame; the movable guide rail is installed on the guide rail bracket, and the movable guide rail is driven by an independent driving unit to make the movable guide rail slide on the guide rail bracket; one end of the rotating shaft of the pipe bending membrane is fixedly installed on the output end of the hydraulic gearbox, and the other end of the rotating shaft of the pipe bending membrane is rotatably mounted on the membrane bracket, and the membrane bracket is provided with an independent and easy-to-disassemble buckle to prevent the rotating shaft of the pipe bending membrane from separating from the membrane bracket.

[0004] Preferably, the installation connection between the hydraulic transmission and the adjustable height fixed box is provided with positioning pin holes and threaded holes that cooperate with each other; the installation connection between the base frame and the adjustable height fixed box is provided with positioning pin holes and threaded holes that cooperate with each other; the installation connection between the guide rail bracket and the base frame is provided with positioning pin holes and threaded holes that cooperate with each other; the base frame and the fetal membrane bracket are provided with positioning pin holes and threaded holes that cooperate with each other, and a fixed installation method that is easy to disassemble is adopted between the bottom of the fetal membrane bracket and the base frame, so as to facilitate the separation of the rotating axis of the bent tube fetal membrane from the fetal membrane bracket; a plurality of movable pulleys that cooperate with each other are provided at the connection between the movable guide rail and the guide rail bracket; the bent tube fetal membrane is fixed to the output end of the hydraulic transmission box by positioning pin holes and threaded holes that cooperate with each other; the positioning pin holes and the threaded holes are respectively provided with pins and fixing bolts.

[0005] Preferably, the interior of the bent tube fetal membrane is hollow, and the rotating shaft at the axis center of the bent tube fetal membrane is connected to the interior of the bent tube fetal membrane, and both ends of the rotating shaft are opened, and a separating temperature-conducting plunger is provided in the middle of the interior of the bent tube fetal membrane to seal the interior space of the bent tube fetal membrane into two parts. A heat absorption channel is provided on the inner wall of the bent tube fetal membrane to connect the two separated spaces inside the bent tube fetal membrane, and an auxiliary pressure relief channel is provided through the axis center of the separating temperature-conducting plunger.

[0006] Preferably, a pressure relief chamber is opened in the middle of the axis of the separating temperature conducting plunger, and a supporting slide bar sliding frame is fixed to the inner wall of the pressure relief chamber, and a plurality of guiding supporting slide bars are slidably arranged on the supporting slide bar sliding frame, and one end of all guiding supporting slide bars is fixedly matched with the blocking pressure relief valve plate, and a reset extrusion spring is arranged around each guiding supporting slide bar, and the two ends of the reset extrusion spring are fixedly matched with the blocking pressure relief valve plate and the supporting slide bar sliding frame, wherein the blocking pressure relief valve plate is in contact and sealing cooperation with the auxiliary pressure relief channel, and the auxiliary pressure relief channel is divided into two ends by the pressure relief chamber, and the auxiliary pressure relief channels at the two ends are connected with the pressure relief chamber.

[0007] Preferably, the output end of the hydraulic transmission adopts a transmission tube shaft that runs through the front and back, and the interior of the transmission tube shaft is connected to the interior of the curved tube fetal membrane; the base frame is also fixed with a support panel and two auxiliary brackets in a manner that is easy to disassemble, and the auxiliary brackets and the support panel are fixedly matched, and a second guide inner ring cavity is rotatably installed on one of the auxiliary brackets, and a rotating seal is adopted between the second guide inner ring cavity and the transmission tube shaft, a second guide outer ring cavity is arranged on the outside of the second guide inner ring cavity, and the side of the second guide outer ring cavity is fixedly connected to the first guide outer ring cavity, and a first guide inner ring cavity coaxial with the second guide inner ring cavity is arranged at the inner axis of the first guide outer ring cavity.

[0008] Preferably, the second guide inner circle cavity is connected to the interior of the second guide outer circle cavity through a plurality of second heat sinks arranged in a circular array; the first guide inner circle cavity is connected to the interior of the first guide outer circle cavity through a plurality of first heat sinks arranged in a circular array.

[0009] Preferably, an input rotating shaft tube is rotatably mounted on another auxiliary bracket, the input rotating shaft tube is rotationally sealed with the first guide inner ring cavity, and two fixedly matched central gears and a heat dissipation fan are rotatably sleeved on the outer surface of the input rotating shaft tube.

[0010] Preferably, three planetary gears are rotatably mounted on the support panel, the three planetary gears mesh with the central gear for transmission, and an outer ring gear bracket is fixedly provided on the input rotating shaft tube, on which an outer ring gear bracket is fixedly mounted for transmission with the three planetary gears for transmission.

[0011] Preferably, a heat dissipation drive motor is also fixed on the support panel, and the heat dissipation drive motor is connected to the input rotating shaft tube through a transmission belt.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention sets a hollow structure inside the bent tube membrane, and cools the bent tube membrane by passing cooling water inside. This design effectively prevents the high-temperature steel pipe from heating the bent tube membrane during the winding process, avoids the membrane from increasing in diameter due to thermal expansion, thereby ensuring the accuracy of the finished diameter of the spiral tube and reducing the dimensional error caused by temperature changes; (2) The present invention is equipped with a complex cooling circulation system, including the first and second guide inner ring cavities and outer ring cavities, as well as multiple heat sinks and heat dissipation fans. Cooling water circulates in the system to effectively take away heat. At the same time, an auxiliary pressure relief channel and a blocking pressure relief valve plate are set. When the cooling channel is blocked and the internal pressure increases, the pressure relief can be automatically opened to prevent damage to the seal caused by overpressure, thereby ensuring the safety and reliability of the equipment; (3) The bent tube membrane of the present invention is provided with a pin that can limit the separation of the steel pipe and the membrane, ensuring that the steel pipe is always close to the membrane surface during the bending process. This design avoids displacement or sliding of the steel pipe during the bending process, ensures that the shape of the spiral pipe after bending is uniform, and improves the molding quality of the product; (4) After the bending pipe is formed, the present invention uses a fixed diameter limit shell to cover the spiral pipe to prevent radial stress rebound and ring layer rebound of the bending pipe. This measure ensures that the spiral pipe maintains its shape during the cooling process and reduces deformation caused by stress release in the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of the overall structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the structure of the hydraulic box of the present invention.

[0015] Figure 3 It is a schematic diagram of the curved tube fetal membrane structure of the present invention.

[0016] Figure 4 It is a schematic diagram of the internal structure of the curved tube fetal membrane of the present invention.

[0017] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A in the middle.

[0018] Figure 6 It is a schematic diagram of the structure of the outer ring gear support of the present invention.

[0019] Figure 7 This is a structural breakdown diagram of the central gear of the present invention.

[0020] Figure 8 It is a schematic diagram of the structure of the heat sink of the present invention.

[0021] In the figure: 101-hydraulic box; 102-hydraulic gearbox; 103-adjustable height fixed box; 104-base frame; 105-movable guide rail; 106-guide rail bracket; 107-bent tube fetal membrane; 108-fetal membrane bracket; 109-fixing bolt; 110-transmission pipe shaft; 111-auxiliary bracket; 112-support panel; 113-heat dissipation drive motor; 114-transmission belt; 115-input rotating shaft tube; 116-heat absorption channel; 117-separation temperature conduction plunger; 118-auxiliary drain Pressure channel; 119-pressure relief chamber; 120-blocking pressure relief valve plate; 121-guide support slide rod; 122-reset extrusion spring; 123-support slide rod sliding frame; 124-outer ring gear bracket; 125-outer ring gear; 126-planetary gear; 127-central gear; 128-first guide outer ring cavity; 129-second guide outer ring cavity; 130-second heat sink; 131-first heat sink; 132-second guide inner ring cavity; 133-first guide inner ring cavity; 134-cooling fan. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-Figure 8 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0023] The present invention provides a spiral pipe bending device, comprising a hydraulic box 101, a hydraulic gearbox 102, an adjustable height fixed box 103, a base frame 104, a movable guide rail 105, a guide rail bracket 106, a pipe bending fetal membrane 107, a fetal membrane bracket 108 and a fixing bolt 109; the hydraulic box 101 and the hydraulic gearbox 102 are matched with each other and connected by hydraulic pipes; the hydraulic gearbox 102 is installed on the adjustable height fixed box 103; the adjustable height fixed box 103 is installed on the base frame 104, and the guide rail bracket 106 is installed on the base frame 10 4; the movable guide rail 105 is installed on the guide rail bracket 106, and the movable guide rail 105 is driven by an independent driving unit to make the movable guide rail 105 slide on the guide rail bracket 106; one end of the rotating shaft of the bent tube fetal membrane 107 is fixedly installed on the output end of the hydraulic transmission box 102, and the other end of the rotating shaft of the bent tube fetal membrane 107 is rotatably mounted on the fetal membrane bracket 108, and the fetal membrane bracket 108 is provided with an independent and easy-to-detach buckle to prevent the rotating shaft of the bent tube fetal membrane 107 from separating from the fetal membrane bracket 108. The installation connection between the hydraulic transmission 102 and the adjustable height fixed box 103 is provided with positioning pin holes and threaded holes that cooperate with each other; the installation connection between the base frame 104 and the adjustable height fixed box 103 is provided with positioning pin holes and threaded holes that cooperate with each other; the installation connection between the guide rail bracket 106 and the base frame 104 is provided with positioning pin holes and threaded holes that cooperate with each other; the base frame 104 and the fetal membrane bracket 108 are provided with positioning pin holes and threaded holes that cooperate with each other, and a fixed installation method that is easy to disassemble is adopted between the bottom of the fetal membrane bracket 108 and the base frame 104, so as to facilitate the separation of the rotating axis of the bent tube fetal membrane 107 from the fetal membrane bracket 108; a plurality of movable pulleys that cooperate with each other are provided at the connection between the movable guide rail 105 and the guide rail bracket 106; the bent tube fetal membrane 107 is fixed to the output end of the hydraulic transmission 102 by positioning pin holes and threaded holes that cooperate with each other; the positioning pin holes and the threaded holes are respectively provided with pins and fixing bolts 109.

[0024] The interior of the bent tube fetal membrane 107 is hollow, and the rotating shaft at the axis of the bent tube fetal membrane 107 is connected to the interior of the bent tube fetal membrane 107, and both ends of the rotating shaft are opened. A separating heat-conducting plunger 117 is provided in the middle of the interior of the bent tube fetal membrane 107 to seal the interior space of the bent tube fetal membrane 107 into two parts. A heat absorption channel 116 is provided on the inner wall of the bent tube fetal membrane 107 for connecting the two separated spaces inside the bent tube fetal membrane 107, and an auxiliary pressure relief channel 118 is provided through the axis of the separating heat-conducting plunger 117. A pressure relief chamber 119 is provided in the middle of the axis of the separating temperature conducting plunger 117, and a supporting slide bar sliding frame 123 is fixed to the inner wall of the pressure relief chamber 119, and a plurality of guiding supporting slide bars 121 are slidably arranged on the supporting slide bar sliding frame 123, and one end of all guiding supporting slide bars 121 is fixedly matched with the blocking pressure relief valve plate 120, and a reset extrusion spring 122 is arranged around each guiding supporting slide bar 121, and the two ends of the reset extrusion spring 122 are fixedly matched with the blocking pressure relief valve plate 120 and the supporting slide bar sliding frame 123, wherein the blocking pressure relief valve plate 120 is in contact and sealing cooperation with the auxiliary pressure relief channel 118, and the auxiliary pressure relief channel 118 is divided into two ends by the pressure relief chamber 119, and the auxiliary pressure relief channels 118 at the two ends are connected with the pressure relief chamber 119. The output end of the hydraulic transmission 102 adopts a transmission tube shaft 110 that runs through the front and back, and the interior of the transmission tube shaft 110 is connected to the interior of the curved tube fetal membrane 107; the base frame 104 is also fixed with a support panel 112 and two auxiliary brackets 111 in a manner that is easy to disassemble, and the auxiliary brackets 111 and the support panel 112 are fixedly matched, and a second guide inner ring cavity 132 is rotatably mounted on one of the auxiliary brackets 111, and a rotary seal is adopted between the second guide inner ring cavity 132 and the transmission tube shaft 110, and a second guide outer ring cavity 129 is arranged on the outside of the second guide inner ring cavity 132, and the side of the second guide outer ring cavity 129 is fixedly connected to the first guide outer ring cavity 128, and a first guide inner ring cavity 133 coaxial with the second guide inner ring cavity 132 is arranged at the inner axis of the first guide outer ring cavity 128. The second flow guiding inner ring cavity 132 is connected to the second flow guiding outer ring cavity 129 through a plurality of second heat sinks 130 arranged in a circular array; the first flow guiding inner ring cavity 133 is connected to the first flow guiding outer ring cavity 128 through a plurality of first heat sinks 131 arranged in a circular array. An input rotating shaft tube 115 is rotatably mounted on another auxiliary bracket 111, and the input rotating shaft tube 115 is rotatably sealed with the first flow guiding inner ring cavity 133. Two fixedly matched central gears 127 and a heat dissipation fan 134 are rotatably sleeved on the outer surface of the input rotating shaft tube 115.Three planetary gears 126 are rotatably mounted on the support panel 112, and the three planetary gears 126 are meshed with the central gear 127 for transmission. An outer ring gear bracket 124 is also fixedly provided on the input rotating shaft tube 115, and an outer ring gear 125 meshed with the three planetary gears 126 is fixed on the outer ring gear bracket 124. A heat dissipation drive motor 113 is also fixed on the support panel 112, and the heat dissipation drive motor 113 is connected to the input rotating shaft tube 115 through a transmission belt 114 for transmission.

[0025] The working principle of a spiral pipe bending device disclosed in the present invention is as follows: a steel pipe is placed on a movable guide rail 105 (which plays a role in guiding the steel pipe), a pipe bending membrane 107 is inserted (a pin that can limit the separation of the steel pipe and the pipe bending membrane 107 is provided on the pipe bending membrane 107), and the pipe bending membrane 107 is driven to rotate by the hydraulic box 101 and the hydraulic gearbox 102 (the output rotating shaft of the hydraulic gearbox 102 is the transmission pipe shaft 110, and it is arranged to penetrate from front to back, so that the output end of the hydraulic gearbox 102 has two coaxial output ends), so as to realize that the steel pipe is wound on the outer wall of the pipe bending membrane 107 with a fixed diameter, and the positioning angle of the pipe bending membrane 107 and the movement of the steel pipe in the movable guide rail 105 are set, and the movable guide rail 105 moves on the guide rail bracket 106, so that multiple circles of the pipe bending are mutually fitted after the pipe bending is formed, and after the pipe bending is formed, the membrane bracket 108 is opened, and the fixed diameter limiting shell is covered on the outside of the formed pipe bending to prevent the radial stress rebound and the ring layer rebound of the pipe bending. In actual operation, the bending membrane and movable guide rail can be used to adjust the specific pipe specifications, bending diameter and bending angle according to the actual application.

[0026] In most cases, in order to prevent the radial stress rebound and ring layer rebound of the bent pipe, the steel pipe is heated before bending, and then wound on the bent pipe fetal membrane 107 for processing, and then cooled. However, the high-temperature steel pipe will heat the bent pipe fetal membrane 107 after being wound on the bent pipe fetal membrane 107, thereby causing the diameter of the bent pipe fetal membrane 107 to change, and then causing the diameter of the spiral pipe after winding to change (too large). In order to reduce this error, the inside of the bent pipe fetal membrane 107 is set to a hollow state, and then cooling water is passed into the inside of the bent pipe fetal membrane 107, which will cool the bent pipe fetal membrane 107 itself and keep its temperature within a certain range, thereby controlling and reducing the error. Specifically, a water pool is arranged at the bottom of the base frame 104, and then the cooling water in the water pool is transported to the input rotating shaft tube 115 through a water pump and a water pipe (the connection between the water pipe and the input rotating shaft tube 115 adopts a rotating seal cooperation mode). At this time, the cooling water will enter the input rotating shaft tube 115, and then enter the first guide inner ring cavity 133, and pass through the first heat sink 131, the first guide outer ring cavity 128, the second guide outer ring cavity 129, and the second heat sink 130 in sequence to enter the second guide inner ring cavity 132, and then enter the curved tube fetal membrane 107 through the transmission pipe shaft 110, flow to the other side of the curved tube fetal membrane 107 through the heat absorption channel 116, and then fall back into the water pool at the bottom to circulate in sequence (the bottom surface of the water pool can be inclined so that the water pump is located at the bottom At this time, if there are too many impurities in the circulating cooling water, the heat absorption channel 116 will be blocked (because the cross-sectional area of ​​the heat absorption channel 116 is small). At this time, the pressure inside the bent tube fetal membrane 107 will increase, and the blocking pressure relief valve plate 120 blocked in the auxiliary pressure relief channel 118 can play a role. Under the push of pressure, the blocking pressure relief valve plate 120 is separated from the auxiliary pressure relief channel 118 (the guide support slide rod 121 and the support slide rod sliding frame 123 slide relative to each other, and the reset extrusion spring 122 is deformed), and then the cooling water flows through the auxiliary pressure relief channel 118 to the other end of the bent tube fetal membrane 107 to prevent the rotary seal from being damaged due to excessive pressure. The circulating cooling water needs to be cooled before re-entering the curved tube fetal membrane 107, so the heat dissipation drive motor 113 is started, and the output shaft of the heat dissipation drive motor 113 drives the input rotating shaft tube 115 to rotate through the transmission belt 114, and the input rotating shaft tube 115 drives the outer ring gear bracket 124 to rotate, and the outer ring gear bracket 124 drives the outer ring gear 125 to rotate, and the outer ring gear 125 drives the center gear 127 to rotate through the planetary gear 126, and the center gear 127 drives the cooling fan 134 to rotate, and the cooling fan 134 drives the external air to blow to the second heat sink 130 and the first heat sink 131, so as to cool the cooling water flowing through.

Claims

1. A spiral pipe bending device, characterized in that: It comprises a hydraulic box (101), a hydraulic transmission box (102), an adjustable height fixed box (103), a base frame (104), a movable guide rail (105), a guide rail bracket (106), a bent tube fetal membrane (107), a fetal membrane bracket (108) and fixing bolts (109); The hydraulic box (101) and the hydraulic gearbox (102) are matched and connected by hydraulic pipes that cooperate with each other; the hydraulic gearbox (102) is installed on the adjustable height fixed box (103); the adjustable height fixed box (103) is installed on the base frame (104), and the guide rail bracket (106) is installed on the base frame (104); the movable guide rail (105) is installed on the guide rail bracket (106), and the movable guide rail (105) is driven by an independent driving unit to make the movable guide rail (105) slide on the guide rail bracket (106); one end of the rotating shaft of the bent tube fetal membrane (107) is fixedly installed on the output end of the hydraulic gearbox (102), and the other end of the rotating shaft of the bent tube fetal membrane (107) is rotatably mounted on the fetal membrane bracket (108), and the fetal membrane bracket (108) is provided with an independent and easily disassembled buckle to prevent the rotating shaft of the bent tube fetal membrane (107) from being separated from the fetal membrane bracket (108).

2. A spiral pipe bending device according to claim 1, characterized in that: The hydraulic transmission (102) and the height-adjustable fixed box (103) are provided with mutually matching positioning pin holes and threaded holes at the installation connection; the base frame (104) and the height-adjustable fixed box (103) are provided with mutually matching positioning pin holes and threaded holes at the installation connection; the guide rail bracket (106) and the base frame (104) are provided with mutually matching positioning pin holes and threaded holes at the installation connection; the base frame (104) and the fetal membrane bracket (108) are provided with mutually matching positioning pin holes and threaded holes, and the fetal membrane bracket (108) is provided with mutually matching positioning pin holes and threaded holes. 08) is fixedly installed between the bottom of the bent tube fetal membrane (107) and the base frame (104) in a manner that is easy to disassemble, so that the rotating axis of the bent tube fetal membrane (107) and the fetal membrane bracket (108) can be separated; a plurality of movable pulleys that cooperate with each other are provided at the connection between the movable guide rail (105) and the guide rail bracket (106); the bent tube fetal membrane (107) and the output end of the hydraulic transmission box (102) are fixed by means of mutually cooperating positioning pin holes and threaded holes; and pins and fixing bolts (109) are respectively provided in the positioning pin holes and the threaded holes.

3. A spiral pipe bending device according to claim 2, characterized in that: The interior of the bent tube fetal membrane (107) is hollow, and the rotating shaft at the axis of the bent tube fetal membrane (107) is connected to the interior of the bent tube fetal membrane (107), and both ends of the rotating shaft are opened. A separating heat-conducting plunger (117) is provided in the middle of the bent tube fetal membrane (107) to seal the inner space of the bent tube fetal membrane (107) into two parts. A heat absorption channel (116) is provided on the inner wall of the bent tube fetal membrane (107) for connecting the two separated spaces inside the bent tube fetal membrane (107), and an auxiliary pressure relief channel (118) is provided through the axis of the separating heat-conducting plunger (117).

4. A spiral pipe bending device according to claim 3, characterized in that: A pressure relief chamber (119) is provided in the middle of the axis of the partitioning temperature conducting plunger (117), a support slide bar sliding frame (123) is fixed to the inner wall of the pressure relief chamber (119), a plurality of guide support slide bars (121) are slidably arranged on the support slide bar sliding frame (123), one end of all the guide support slide bars (121) are fixedly matched with the blocking pressure relief valve plate (120), a reset extrusion spring (122) is arranged around each guide support slide bar (121), and both ends of the reset extrusion spring (122) are fixedly matched with the blocking pressure relief valve plate (120) and the support slide bar sliding frame (123), wherein the blocking pressure relief valve plate (120) is in contact and sealing cooperation with the auxiliary pressure relief channel (118), the auxiliary pressure relief channel (118) is divided into two ends by the pressure relief chamber (119), and the auxiliary pressure relief channels (118) at both ends are connected to the pressure relief chamber (119).

5. A spiral pipe bending device according to claim 4, characterized in that: The output end of the hydraulic transmission box (102) adopts a transmission pipe shaft (110) that penetrates from front to back, and the interior of the transmission pipe shaft (110) is communicated with the interior of the curved tube fetal membrane (107); The base frame (104) is also fixed with a support panel (112) and two auxiliary brackets (111) in a manner that is easy to disassemble, and the auxiliary brackets (111) and the support panel (112) are fixedly matched, a second flow guide inner ring cavity (132) is rotatably mounted on one of the auxiliary brackets (111), and a rotational seal is adopted between the second flow guide inner ring cavity (132) and the transmission tube shaft (110), a second flow guide outer ring cavity (129) is arranged on the outside of the second flow guide inner ring cavity (132), a side of the second flow guide outer ring cavity (129) is fixedly connected to the first flow guide outer ring cavity (128), and a first flow guide inner ring cavity (133) coaxial with the second flow guide inner ring cavity (132) is arranged at the inner axis of the first flow guide outer ring cavity (128).

6. A spiral pipe bending device according to claim 5, characterized in that: The second flow guiding inner ring cavity (132) is connected to the interior of the second flow guiding outer ring cavity (129) via a plurality of second heat sinks (130) arranged in a circular array; and the first flow guiding inner ring cavity (133) is connected to the interior of the first flow guiding outer ring cavity (128) via a plurality of first heat sinks (131) arranged in a circular array.

7. A spiral pipe bending device according to claim 6, characterized in that: An input rotating shaft tube (115) is rotatably mounted on another auxiliary bracket (111), the input rotating shaft tube (115) and the first flow guide inner ring cavity (133) are rotatably sealed, and two fixedly matched central gears (127) and a heat dissipation fan (134) are rotatably sleeved on the outer surface of the input rotating shaft tube (115).

8. A spiral pipe bending device according to claim 7, characterized in that: Three planetary gears (126) are rotatably mounted on the support panel (112), and the three planetary gears (126) are meshed with a central gear (127) for transmission. An outer ring gear bracket (124) is also fixedly provided on the input rotating shaft tube (115), and an outer ring gear bracket (124) is fixedly provided with an outer ring gear (125) meshed with the three planetary gears (126) for transmission.

9. A spiral pipe bending device according to claim 8, characterized in that: A heat dissipation drive motor (113) is also fixed on the support panel (112), and the heat dissipation drive motor (113) is connected to the input rotating shaft tube (115) via a transmission belt (114).

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