Flaring device for ultra-large-diameter winding pipe and preparation process of flaring device

Abstract

The invention discloses an ultra-large-diameter winding pipe flaring device and a preparation process thereof, and relates to the technical field of ultra-large-diameter winding pipe flaring. A lifting module used for driving a pipe body to ascend and descend is arranged on the movable platform frame and used for supporting and limiting the pipe body to be subjected to flaring machining. A tensioning mold for clamping and fixing the pipe body is arranged on one side of the movable platform frame, and a socket mold for forming a socket joint at the end part of the pipe body is arranged on the other side of the movable platform frame; an extruder is further arranged on one side of the movable platform frame, an extrusion die is arranged at the output end of the extruder, and the extruder is used for plasticizing high-density polyethylene, extruding the plasticized high-density polyethylene through the extrusion die in a sheet form and winding the plasticized high-density polyethylene at the bellmouth of the pipe body; according to the pipe body, the bellmouth joint is formed by winding and extruding the end opening, the bellmouth joint is prepared from the high-density polyethylene material, and the high-density polyethylene material has high corrosion resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of flaring of extra-large diameter winding pipes, and particularly relates to an extra-large diameter winding pipe flaring device and a preparation process thereof. Background Art

[0002] An extra-large diameter winding pipe is a large-diameter pipe made of materials such as high-density polyethylene (HDPE) through a winding molding process. Usually, the diameter can reach DN1500 and above, and the maximum even exceeds DN3000. It is widely used in fields such as urban drainage, industrial sewage discharge, and agricultural irrigation. Usually, the raw material is extruded into a strip or plate by an extruder, and then wound around a mandrel on a winding molding machine at a certain spiral angle and overlap rate, and is made through processes such as heating, cooling, and shaping.

[0003] In the industry of extra-large diameter winding pipes, its connection method is a problem that is difficult to effectively solve in the industry. At present, the connection methods for extra-large diameter winding pipes mainly still use the method of cement wrapping or the method of hoop. Although the above can all achieve the water-tight effect, the disadvantages are relatively obvious: Among them, although the method of cement wrapping is simple and effective, taking a winding pipe with ID2200 as an example, its outer diameter can reach about 2400 mm. To effectively connect two pipes in a limited trench, a large amount of concrete needs to be coated. Moreover, this connection method belongs to a mechanical rigid connection, which is prone to water seepage during geological settlement, and the construction is inconvenient and the cost is relatively high; The connection method of the hoop belongs to a ductile connection in terms of water tightness and can effectively resist geological settlement. Taking the connection of the hoop of the ID2200 winding pipe as an example, the cost of a single hoop joint is about 20,000. Although the construction is more convenient than the cement wrapping method, the selection of stainless steel material and the skill professionalism requirements for on-site construction workers are relatively high, and effective water tightness cannot be guaranteed. Summary of the Invention

[0004] The present invention provides an extra-large diameter winding pipe flaring device and a preparation process thereof, which can solve the following problems existing in the prior art: 1) When connecting an extra-large diameter winding pipe by the method of cement wrapping, a large amount of concrete needs to be coated, and this connection method belongs to a mechanical rigid connection, which is prone to water seepage during geological settlement, and the construction is inconvenient and the cost is relatively high; 2) When using the connection method of the hoop, the cost and the accuracy requirements of the installation process are relatively high, and the sealing performance cannot be guaranteed. An extra-large diameter winding pipe flaring device and a preparation process thereof, including a mobile platform frame; an elevating module for driving the lifting of the pipe body is arranged on the mobile platform frame to support and limit the pipe body to be processed for flaring. On one side of the mobile platform frame, there is a tensioning die for clamping and fixing the pipe body, and on the other side, there is a socket die for forming a socket joint at the end of the pipe body; Among them, an extruder is also provided on one side of the mobile platform frame. An extrusion die is provided at the output end of the extruder. The extruder is used to plasticize high-density polyethylene and extrude it in the form of a sheet through the extrusion die and wind it around the socket of the pipe body.

[0005] Preferably, the outer edge surface of the socket die on the side close to the tensioning die is set as a flared conical structure.

[0006] Preferably, the lifting module includes a scissor lift. A lifting platform is fixedly arranged on the scissor lift. At least two groups of limiting rollers are symmetrically and rotatably arranged on the lifting platform. The limiting rollers are rotatably arranged on the bearing frame.

[0007] Preferably, the socket die includes an upper die structure and a lower die structure. The cross-sections of the upper die structure and the lower die structure are semi-circular. The upper die structure and the lower die structure both include two groups of side dies arranged symmetrically. A middle die is embedded between the two groups of side dies. The contact surfaces between the two side dies and the middle die are slidably fitted; Among them, the socket die further includes a first adjustment part and a second adjustment part. The first adjustment part is used to drive the two middle dies to move synchronously towards or away from the axis of the socket die, and the second adjustment part is used to drive the two side dies to deflect towards or away from the axis.

[0008] Preferably, the socket die further includes a mounting frame fixed on the mobile platform frame. A positioning frame for mounting the upper die structure and the lower die structure is fixedly arranged on the mounting frame. The first adjustment part includes a second bidirectional lead screw rotatably arranged in the positioning frame. Second nuts are symmetrically and helically sleeved on the second bidirectional lead screw. Two groups of positioning rods are respectively fixedly arranged on the sides of the two middle dies close to each other. The end of the positioning rod away from the middle die is fixed to the positioning plate, and the positioning plate is fixed to the second nut; Among them, a first gear is fixedly arranged on the second bidirectional lead screw. An adjustment motor is fixedly arranged on one side of the positioning frame. A second gear meshing with the first gear is fixedly arranged at the output end of the adjustment motor.

[0009] Preferably, the second adjustment part includes two groups of adjustment seats fixed at both ends of the positioning frame. An adjustment shaft fixedly connected with the side die is rotatably arranged in each adjustment seat; Among them, two groups of convex plates are respectively fixedly arranged at both ends of the sides of the two middle dies close to each other. A hook-shaped limiting plate is rotatably arranged on the convex plate. The other end of the hook-shaped limiting plate is rotatably connected with the side die.

[0010] Preferably, the tensioning die includes a tensioning bracket. On the side of the tensioning bracket facing the socket die, a number of groups of tensioning clamps are arranged in a circumferential array. On the side of each tensioning clamp facing the axis, a tensioning rod is fixedly arranged, and each tensioning rod is connected to a tensioning mechanism that drives it to move synchronously towards or away from the axis.

[0011] Preferably, the tensioning mechanism includes a tensioning motor arranged on the tensioning bracket. The output end of the tensioning motor is fixed to an adjustment disk. A number of groups of inclined slots corresponding to the tensioning clamps one by one are circumferentially arrayed on the adjustment disk. The inclined slots are inclined from the near-axis end to the far-axis end, and a guide shaft fixed to the tensioning rod is slidably embedded in the inclined slots; Wherein, a guide disk is also fixedly arranged on the tensioning motor, and a guide rail for slidably plugging the tensioning rod is arranged on the guide disk.

[0012] Preferably, a die-pushing rotation motor is also fixedly arranged on the tensioning bracket. The output end of the die-pushing rotation motor is fixed to the guide disk. An expansion die rotation motor is fixedly arranged on the mounting frame, and the output end of the expansion die rotation motor is fixed to one side of the positioning frame.

[0013] A preparation process for expanding the socket of an extra-large diameter winding pipe, which is applied to the above-mentioned extra-large diameter winding pipe socket expanding device, includes the following steps: After the tensioning die, the socket die and the lifting module are installed and debugged, place the pipe body on the lifting module; The small platform traveling motor drives the pipe body to move towards the socket die. When the pipe body contacts the limit position of the socket die, the tensioning die moves towards the pipe body. After the tensioning die enters 2 / 3 of the pipe, the tensioning die clamps the inside of the pipe body; Start the extruder. The extruder plasticizes the high-density polyethylene and extrudes it in the form of a sheet through the extrusion die. The sheet-like polyethylene is initially bonded to the position 20 cm from the pipe port; After one circle of winding, the moving platform frame carries the entire pipe body to move, while the extruder only extrudes the sheet at a fixed position. At this time, the sheet will form a socket with a fixed pitch and a fixed wall thickness that meets the requirements in a spiral shape at the port of the pipe body and the socket die; After the socket is prepared, turn on the water mist cooling; After cooling is completed, the tensioning die retracts and drives the pipe body to be pulled out. At this time, the cutting machine is started to cut off the redundant part of the socket of the pipe body; After cutting is completed, the cutting machine is turned off and reset. The tensioning die contracts and retracts until it is separated from the pipe body, leaving the prepared pipe body with a socket joint on the moving platform frame; The traveling crane hoists the pipe body to the designated position for placement, and performs final cooling and shaping, and the preparation is completed.

[0014] The present invention provides a flaring device for an extra-large diameter winding pipe and its preparation process, including the following beneficial effects: 1) In the present invention, when the flaring device is stationary, first, the tensioning die, the socket die, and the lifting module are installed and debugged. Then, the pipe body is placed on the lifting module. At this time, the small platform traveling motor drives the pipe body to move in the direction of the socket die. When the pipe body contacts the limit position of the socket die, the tensioning die moves towards the pipe body. After the tensioning die enters 2 / 3 of the pipe, the inside of the pipe body is clamped by the tensioning die. At this time, the pre-installation action of the equipment on the pipe body is completed. Then, the extruder is started. The extruder plasticizes the high-density polyethylene and extrudes it in the form of a sheet through the extrusion die. The sheet-shaped polyethylene is initially bonded at a position 20 cm from the pipe port. When the winding reaches one circle, the entire pipe body is moved by the moving platform frame, while the extruder only extrudes the sheet at a fixed position. At this time, the sheet will form a socket with a fixed pitch and a fixed wall thickness that meets the requirements in a spiral shape at the port of the pipe body and the socket die. When the socket is prepared, water mist cooling is started. After the cooling is completed, the tensioning die retracts and drives the pipe body to be pulled out. At this time, the cutting machine is started to cut off the excess part of the socket of the pipe body. After the cutting is completed, the cutting machine is turned off and reset. Then, the tensioning die contracts and retracts until it is separated from the pipe body, leaving the prepared pipe body with a socket joint on the moving platform frame. Finally, the pipe body is lifted by a crane and placed at a designated position for final cooling and shaping, and the above-mentioned complete preparation action is completed; 2) The pipe body of the present invention forms a socket joint by winding and extruding at the port. The socket joint is prepared from high-density polyethylene material with a tensile strength ≥ 20 MPa and an elongation at break ≥ 500%. The material properties of high-density polyethylene can have high corrosion resistance and ensure the service life; 3) By setting a flared conical structure on the socket die in the present invention, the formed socket joint as a whole also presents a certain flared conical shape, which ensures that it is more labor-saving and convenient when assembling with the spigot. Moreover, the design of the flared conical shape makes it tighter and tighter during insertion, ensuring the water tightness; 4) In the initial state of the present invention, the two side dies and the middle die are attached to each other and form a semi-circular structure, and the upper die structure and the lower die structure form a complete circular structure. When the socket joint is prepared and the cooling is completed, the present invention first drives the middle die to move towards the center of the socket die by the first adjusting part, and then drives the two side dies to deflect towards the center by the second adjusting part, so that the upper die structure and the lower die structure are in a state of gathering and shrinking and separated from the socket joint. Therefore, it is convenient to separate the socket joint from the socket die and avoid damage to the socket joint during the separation process, with higher stability. Description of the Drawings

[0015] Figure 1 Structural schematic diagram of the pipe body prepared for the present invention; Figure 2 Top view structural schematic diagram of a flaring device for extra-large diameter winding pipes provided by the present invention; Figure 3 Front view structural schematic diagram of a flaring device for extra-large diameter winding pipes provided by the present invention; Figure 4 Side view structural schematic diagram of a flaring device for extra-large diameter winding pipes provided by the present invention; Figure 5 Structural schematic diagram of the tensioning die in a flaring device for extra-large diameter winding pipes provided by the present invention; Figure 6 Side view structural schematic diagram of the tensioning die in a flaring device for extra-large diameter winding pipes provided by the present invention; Figure 7 Structural schematic diagram of the elevator in a flaring device for extra-large diameter winding pipes provided by the present invention; Figure 8 Structural schematic diagram of the second walking wheel in a flaring device for extra-large diameter winding pipes provided by the present invention; Figure 9 Structural schematic diagram of the mounting frame in a flaring device for extra-large diameter winding pipes provided by the present invention; Figure 10 Structural schematic diagram of the second bidirectional lead screw in a flaring device for extra-large diameter winding pipes provided by the present invention; Figure 11 Structural schematic diagram of the initial state of the socket die in a flaring device for extra-large diameter winding pipes provided by the present invention; Figure 12 Structural schematic diagram of the socket die when it shrinks in a flaring device for extra-large diameter winding pipes provided by the present invention; Figure 13 Structural schematic diagram of the adjusting disc in a flaring device for extra-large diameter winding pipes provided by the present invention.

[0016] Explanation of reference numerals: 1. Pipe body; 2. Tightening die; 3. Socket die; 4. Extruder; 5. Mobile platform frame; 6. Lifting module; 7. Adjusting motor; 101. Socket joint; 201. Tightening support; 202. Tightening die walking motor; 203. Third walking wheel; 204. Tightening clamp; 205. Tightening rod; 206. Guide rail; 207. Tightening die revolution motor; 208. Tightening motor; 209. Guide disk; 210. Adjusting disk; 211. Inclined groove; 212. Guide shaft; 301. Mounting frame; 302. Flaring die revolution motor; 303. Bellmouth conical structure; 401. Extrusion die; 501. First walking wheel; 502. Large platform walking motor; 601. Limiting roller; 602. Lifting platform; 603. Lift; 604. Second walking wheel; 605. Convex plate; 606. Hook-shaped limiting plate; 607. First nut; 608. Adjusting seat; 609. Positioning frame; 610. Upper die structure; 611. Lower die structure; 612. Side die; 613. Middle die; 614. Adjusting shaft; 615. Small platform walking motor; 616. Handle; 617. First bidirectional lead screw; 618. Bearing frame; 701. Second gear; 702. First gear; 703. Second bidirectional lead screw; 704. Second nut; 705. Positioning plate; 706. Positioning rod; 707. Guide rod. Detailed implementation mode

[0017] The following will describe in detail the specific implementation modes of the present invention, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0018] Example 1 As Figures 1 to 4 shown, a large-diameter winding pipe flaring device provided by an embodiment of the present invention includes a mobile platform frame 5; specifically, a number of groups of first walking wheels 501 are arranged at the bottom of the mobile platform frame 5 in this embodiment, and the first walking wheels 501 are arranged to roll in the walking track. Among them, a large platform walking motor 502 is fixedly arranged on the mobile platform frame 5, and the large platform walking motor 502 is used to drive the first walking wheels 501 to move in the walking track; It can be explained that by setting the movable mobile platform frame 5 in this embodiment, the position of the pipe body 1 can be adjusted in real time to facilitate winding and flaring.

[0019] The lifting module 6 for driving the lifting of the pipe body 1 is provided on the mobile platform frame 5; specifically, at least two groups of the lifting module 6 are provided on the mobile platform frame 5 in this embodiment to support and limit the pipe body 1 to be processed for flaring; among them, the lifting module 6 includes a plurality of second traveling wheels 604, and the second traveling wheels 604 are arranged to roll in the traveling track on the mobile platform frame 5. A small platform traveling motor 615 is fixedly arranged on the lifting module 6, and the small platform traveling motor 615 is used to drive the second traveling wheels 604 to move in the traveling track. It can be explained that in this embodiment, the pipe body 1 is placed on the movable lifting module 6. On the one hand, the height of the pipe body 1 can be adjusted, and on the other hand, the relative position of the pipe body 1 on the mobile platform frame 5 can be adjusted, which is very convenient for adjustment.

[0020] On one side of the mobile platform frame 5, a tensioning die 2 for clamping and fixing the pipe body 1 is provided, and on the other side, a socket die 3 for forming a socket joint 101 at the end of the pipe body 1 is provided; specifically, in this embodiment, the tensioning die 2 includes a plurality of third traveling wheels 203, and the third traveling wheels 203 are arranged to roll in the traveling track on the mobile platform frame 5. A die-tightening traveling motor 202 is fixedly arranged on the tensioning die 2, and the die-tightening traveling motor 202 is used to drive the third traveling wheels 203 to move in the traveling track; it can be explained that in this embodiment, by setting the movable tensioning die 2, after the pipe body 1 is positioned on the lifting module 6, it is convenient to insert the tensioning die 2 into the pipe body 1 for tensioning and fixing.

[0021] Among them, an extruder 4 is also provided on one side of the mobile platform frame 5. An extrusion die 401 is provided at the output end of the extruder 4. The extruder 4 is used to plasticize high-density polyethylene and extrude it in the form of a sheet through the extrusion die 401 and wind it around the socket of the pipe body 1. It should be noted that when the flaring device is stationary, first install and debug the tensioning die 2, socket die 3 and lifting module 6. Then place the pipe body 1 on the lifting module 6. At this time, the small platform traveling motor 615 drives the pipe body 1 to move in the direction of the socket die 3. When the pipe body contacts the limit position of the socket die 3, the tensioning die 2 moves towards the pipe body 1. After the tensioning die 2 enters 2 / 3 of the pipe, the inside of the pipe body 1 is clamped by the tensioning die 2. At this time, the pre-installation action of the pipe body 1 on the equipment is completed. Then start the extruder 4. The extruder 4 plasticizes the high-density polyethylene and extrudes it in the form of flakes through the extrusion die 401. The flaky polyethylene is initially bonded at the 20 cm position of the pipe port. When the winding reaches one circle, the entire pipe body 1 is moved by the moving platform frame 5, while the extruder 4 only extrudes the sheet at a fixed position. At this time, the sheet will form a socket with a fixed pitch and a fixed wall thickness that meets the requirements in a spiral shape at the port of the pipe body 1 and the socket die 3. When the socket is prepared, start the water mist cooling. After the cooling is completed, the tensioning die 2 retracts and drives the pipe body 1 to be pulled out. At this time, the cutting machine starts, cuts off the excess part of the socket of the pipe body 1. After the cutting is completed, the cutting machine shuts down and resets. Then the tensioning die 2 contracts and retracts until it is separated from the pipe body 1, leaving the prepared pipe body 1 with the socket joint 101 on the moving platform frame 5. Finally, the pipe body 1 is lifted by the crane and placed at the designated position for final cooling and shaping, and the above is a complete preparation action.

[0022] In addition, in this embodiment, a socket joint 101 is formed by winding and extruding at the port of the pipe body 1. The socket joint 101 is prepared from high-density polyethylene material, with a tensile strength ≥ 20 MPa and an elongation at break ≥ 500%. The material properties of high-density polyethylene can have high corrosion resistance and ensure the service life.

[0023] Embodiment 2 On the basis of Embodiment 1, in order to further improve the water tightness of the socket joint 101, please refer to Figure 1 and Figure 3 as well as Figures 9 - 10 , the outer edge surface of the socket die 3 on the side close to the tensioning die 2 is set as a flared conical structure 303. It should be noted that in this embodiment, by setting the flared conical structure 303 on the socket die 3, the formed socket joint 101 as a whole also presents a certain flared conical shape, ensuring that it is more labor-saving and convenient when assembling with the spigot. Moreover, the design of the flared cone makes it tighter and tighter during insertion, ensuring the water tightness.

[0024] In this embodiment, reference can be made to Figures 7 - 8, the lifting module 6 includes a scissor lift 603, on which a lifting platform 602 is fixedly arranged. At least two groups of limiting rollers 601 are symmetrically and rotatably arranged on the lifting platform 602, and the limiting rollers 601 are rotatably arranged on the bearing frame 618. It should be noted that before the flaring process of the pipe body 1 in this embodiment, first place the pipe body 1 between the two groups of limiting rollers 601 on the lifting platform 602. The outer wall of the pipe body 1 contacts the roller walls of the two side limiting rollers 601, and the two side limiting rollers 601 support the pipe body 1. When initially winding the sheet polyethylene around the pipe orifice of the pipe body 1, based on the frictional force between the limiting rollers 601 and the pipe body 1, the limiting rollers 601 can be driven to rotate synchronously, so as to facilitate winding the sheet polyethylene material around the pipe orifice of the pipe body 1; In addition, the scissor lift 603 in this embodiment adopts the existing technology, and its specific model is not limited in this embodiment, as long as it can meet the lifting requirements of the lifting platform 602, and its specific structure and working principle will not be elaborated; It should also be noted that the second traveling wheel 604 in this embodiment is rotatably arranged at the bottom of the scissor lift 603, and the small platform traveling motor 615 is fixed on the scissor lift 603.

[0025] In this embodiment, reference can be made to Figures 7 - 8 , in order to make the distance between the two side limiting rollers 601 adaptable to the outer diameter of the pipe body 1, a first bidirectional lead screw 617 is rotatably arranged on the lifting platform 602. First nuts 607 are symmetrically and helically sleeved on the first bidirectional lead screw 617, and the first nuts 607 are fixed to the bearing frame 618. Among them, the end of the first bidirectional lead screw 617 is fixed to the handle 616. It should be noted that when the flaring process of different pipe bodies 1 in the external environment is carried out in this embodiment, based on the outer diameter of the pipe body 1, rotate the handle 616. When the handle 616 drives the first bidirectional lead screw 617 to rotate, the bearing frame 618 can be synchronously driven during the movement of the first nuts 607 on the first bidirectional lead screw 617, and then the distance between the two side limiting rollers 601 can be adjusted, and the operation is very convenient.

[0026] As a further solution of this embodiment, when the socket joint 101 is prepared and waiting to be cooled, in order to facilitate the separation of the socket joint 101 of the pipe body 1 from the socket mold 3 and avoid damage to the socket joint 101 during the separation process, please refer to Figures 9 - 12, the socket mold 3 includes an upper mold structure 610 and a lower mold structure 611. The cross-sections of the upper mold structure 610 and the lower mold structure 611 are semi-circular. Both the upper mold structure 610 and the lower mold structure 611 include two groups of side molds 612 arranged symmetrically. A middle mold 613 is embedded between the two groups of side molds 612. The contact surfaces between the two side molds 612 and the middle mold 613 are in sliding fit. Among them, the socket mold 3 further includes a first adjusting part and a second adjusting part. The first adjusting part is used to drive the two middle molds 613 to move synchronously towards or away from the axis of the socket mold 3. The second adjusting part is used to drive the two side molds 612 to deflect towards or away from the axis; it can be explained that in the initial state, the two side molds 612 and the middle mold 613 are in contact with each other and form a semi-circular structure, and the upper mold structure 610 and the lower mold structure 611 form a complete circular structure. When the socket joint 101 is prepared and waiting for cooling to be completed, in this embodiment, first, the first adjusting part is used to drive the middle mold 613 to move towards the axis of the socket mold 3, and second, the second adjusting part is used to drive the two side molds 612 to deflect towards the axis, so that the upper mold structure 610 and the lower mold structure 611 are in a state of gathering and shrinking and separated from the socket joint 101. Therefore, it is convenient to separate the socket joint 101 from the socket mold 3 and avoid damaging the socket joint 101 during the separation process, with higher stability.

[0027] In this embodiment, the socket mold 3 further includes a mounting frame 301 fixed on the moving platform frame 5. The mounting frame 301 is fixedly provided with a positioning frame 609 for mounting the upper mold structure 610 and the lower mold structure 611. The first adjusting part includes a second bidirectional lead screw 703 rotatably arranged in the positioning frame 609. Second nuts 704 are symmetrically and helically sleeved on the second bidirectional lead screw 703. Two groups of positioning rods 706 are fixedly arranged on the sides of the two middle molds 613 close to each other. One end of the positioning rod 706 away from the middle mold 613 is fixed to a positioning plate 705, and the positioning plate 705 is fixed to the second nut 704; among them, a first gear 702 is fixedly arranged on the second bidirectional lead screw 703, and an adjusting motor 7 is fixedly arranged on one side of the positioning frame 609. The output end of the adjusting motor 7 is fixedly provided with a second gear 701 meshing with the first gear 702; it can be explained that when adjusting the movement of the middle mold 613 in this embodiment, the adjusting motor 7 is started to drive the second gear 701 to rotate. The second gear 701 can drive the second bidirectional lead screw 703 to rotate by meshing with the first gear 702. During the movement of the two second nuts 704 on the second bidirectional lead screw 703, the middle mold 613 can be synchronously driven through the positioning plate 705 and the positioning rod 706.

[0028] In this embodiment, in order to guide the movement of the middle mold 613, at least two sets of guide rods 707 are fixedly arranged on the positioning frame 609, and the positioning plate 705 is slidably sleeved on the guide rods 707. Specifically, when the second nut 704 drives the positioning plate 705 to move, the positioning plate 705 can slide synchronously on the guide rods 707 to achieve the guiding effect and improve the stability of the movement of the middle mold 613.

[0029] Furthermore, the second adjusting part includes two sets of adjusting seats 608 fixed at both ends of the positioning frame 609. In each adjusting seat 608, an adjusting shaft 614 fixedly connected to the side mold 612 is rotatably arranged. Among them, two sets of convex plates 605 are fixedly arranged at both ends of the two middle molds 613 on the side close to each other. A hook-shaped limiting plate 606 is rotatably arranged on the convex plate 605, and the other end of the hook-shaped limiting plate 606 is rotatably connected to the side mold 612. It can be explained that as the first adjusting part drives the two middle molds 613 to approach each other, during the movement of the middle mold 613, the side mold 612 can be driven by the hook-shaped limiting plate 606 to deflect around the adjusting shaft 614 towards the direction close to the axis, thereby achieving the effect of mutual gathering, so that the upper mold structure 610 and the lower mold structure 611 are separated from the socket joint 101. In this embodiment, there is no need to set other servo drive devices to drive the side mold 612 to contract. When the first adjusting part adjusts the contraction of the middle mold 613, the side mold 612 is synchronously driven to contract, with higher synchronism and stability, and the cost is reduced.

[0030] Please refer to Figures 2 - 6 and Figure 13 , the tensioning mold 2 includes a tensioning bracket 201. A number of tensioning clamps 204 are circumferentially arranged on the side of the tensioning bracket 201 facing the socket mold 3. A tensioning rod 205 is fixedly arranged on the side of the tensioning clamp 204 facing the axis. Each tensioning rod 205 is connected to a tensioning mechanism that drives it to move synchronously towards or away from the axis. Specifically, in this embodiment of the city, when fixing the pipe body 1, after the tensioning mold 2 enters 2 / 3 of the pipe, the tensioning mechanism drives each tensioning rod 205 to move synchronously away from the axis. The tensioning rod 205 can drive the tensioning clamp 204 to move synchronously and abut against the inner wall of the pipe body 1 to achieve the effect of clamping and positioning. Correspondingly, when disassembling after processing is completed, the tensioning mechanism drives each tensioning clamp 204 to gather towards the axis. In this embodiment, the third traveling wheel 203 is rotatably arranged at the bottom of the tensioning bracket 201, and the mold-tightening traveling motor 202 is fixed on the tensioning bracket 201.

[0031] In addition, the number of the tensioning clamps 204 set in this embodiment is not limited, as long as it can meet the actual positioning requirements of the pipe body 1. Exemplarily, three sets of tensioning clamps 204 are set in this embodiment.

[0032] The tensioning mechanism includes a tensioning motor 208 disposed on a tensioning bracket 201. The output end of the tensioning motor 208 is fixed to an adjustment disk 210. A plurality of groups of inclined slots 211 corresponding to the tensioning clamps 204 one by one are circumferentially arrayed on the adjustment disk 210. The inclined slots 211 are inclined in the direction from the near-axis end to the far-axis end. A guide shaft 212 fixed to a tensioning rod 205 is slidably embedded in the inclined slots 211. Among them, a guide disk 209 is also fixedly disposed on the tensioning motor 208, and a guide rail 206 for slidably inserting and connecting with the tensioning rod 205 is provided on the guide disk 209. Specifically, in this embodiment, when driving the tensioning clamps 204 to spread or gather synchronously, the adjustment disk 210 can be driven to rotate by the tensioning motor 208. Based on the limiting and guiding effect of the inclined slots 211 on the guide shaft 212, the guide shaft 212 can drive the tensioning rod 205 to move synchronously while moving in the inclined slots 211. Correspondingly, in this embodiment, by providing the guide rail 206, the movement of the tensioning rod 205 can be guided so that the tensioning rod 205 can only move linearly along the guide rail 206.

[0033] Furthermore, in order to initially wind the sheet-shaped polyethylene around the pipe body 1 in a spiral shape, in this embodiment, please refer to Figure 2 , Figure 3 , Figure 6 and Figure 9 . A mold expanding and revolving motor 207 is also fixedly disposed on the tensioning bracket 201. The output end of the mold expanding and revolving motor 207 is fixed to the guide disk 209. An expanding die revolving motor 302 is fixedly disposed on the mounting bracket 301, and the output end of the expanding die revolving motor 302 is fixed to one side of the positioning bracket 609. It can be explained that after the pipe body 1 is positioned, in this embodiment, the pipe body 1 can be driven to rotate by the mold expanding and revolving motor 207 and the expanding die revolving motor 302 to realize initially winding the sheet-shaped polyethylene around the pipe body 1 in a spiral shape.

[0034] An ultra-large diameter winding pipe expanding preparation process includes the following steps: Please refer to Figures 1 - 4 . S1. After the tensioning die 2, the socket die 3, and the lifting module 6 are installed and debugged, place the pipe body 1 on the lifting module 6; S2. The small platform traveling motor 615 drives the pipe body 1 to move towards the socket die 3. When the pipe body contacts the limiting position of the socket die 3, the tensioning die 2 moves towards the pipe body 1. After the tensioning die 2 enters 2 / 3 of the pipe, the tensioning die 2 clamps the inside of the pipe body 1; S3. Start the extruder 4. The extruder 4 plasticizes the high-density polyethylene and extrudes it in the form of a sheet through the extrusion die 401. The sheet-shaped polyethylene is initially adhered to the position 20 cm from the pipe port; S4. After one round of winding, the moving platform frame 5 moves with the entire pipe body 1, while the extruder 4 only extrudes the sheet at a fixed position. At this time, the sheet will form a socket with a fixed pitch and a wall thickness meeting the requirements in a spiral shape at the port of the pipe body 1 and the socket die 3; S5. After the socket is prepared, start the water mist cooling; S6. After the cooling is completed, the tensioning die 2 retracts and drives the pipe body 1 to be pulled out. At this time, the cutting machine starts and cuts off the redundant part of the socket of the pipe body 1; S7. After the cutting is completed, the cutting machine is turned off and reset, and the tensioning die 2 contracts and retracts until it is separated from the pipe body 1, leaving the pipe body 1 with the socket joint 101 prepared on the moving platform frame 5; S8. The traveling crane hoists the pipe body 1 to a designated position for placement, and performs the final cooling and shaping, and the preparation is completed.

[0035] The above-disclosed are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An oversized-caliber winding pipe flaring device, comprising a mobile platform frame (5); characterized in that, The mobile platform frame (5) is provided with a lifting module (6) for driving the lifting of the pipe body (1) to support and limit the pipe body (1) to be processed for flaring. On one side of the mobile platform frame (5), there is a tensioning die (2) for clamping and fixing the pipe body (1), and on the other side, there is a socket die (3) for forming a socket joint (101) at the end of the pipe body (1). Among them, an extruder (4) is further provided on one side of the mobile platform frame (5). The output end of the extruder (4) is provided with an extrusion die (401). The extruder (4) is used to plasticize high-density polyethylene and extrude it in the form of a sheet through the extrusion die (401) and wind it around the socket of the pipe body (1).

2. The flaring device for an extra-large diameter winding pipe according to claim 1, characterized in that, The outer edge surface of the socket die (3) on the side close to the tensioning die (2) is set as a flared conical structure (303).

3. The flaring device for an extra-large diameter winding pipe according to claim 1, wherein, The lifting module (6) includes a scissor lift (603). A lifting platform (602) is fixedly arranged on the scissor lift (603). At least two groups of limiting rollers (601) are symmetrically and rotatably arranged on the lifting platform (602). The limiting rollers (601) are rotatably arranged on a bearing frame (618).

4. The flaring device for super-large-caliber winding pipes according to claim 1, wherein, The socket die (3) includes an upper die structure (610) and a lower die structure (611). The cross-sections of the upper die structure (610) and the lower die structure (611) are semi-circular. Both the upper die structure (610) and the lower die structure (611) include two groups of side dies (612) arranged symmetrically. A middle die (613) is embedded between the two groups of side dies (612). The contact surfaces between the two side dies (612) and the middle die (613) are in sliding fit. Among them, the socket die (3) further includes a first adjusting part and a second adjusting part. The first adjusting part is used to drive the two middle dies (613) to move synchronously towards or away from the axis of the socket die (3), and the second adjusting part is used to drive the two side dies (612) to deflect towards or away from the axis.

5. The flaring device for an extra-large diameter winding pipe according to claim 4, wherein The socket die (3) further includes a mounting frame (301) fixed on the mobile platform frame (5). A positioning frame (609) for mounting the upper die structure (610) and the lower die structure (611) is fixedly arranged on the mounting frame (301). The first adjusting part includes a second bidirectional lead screw (703) rotatably arranged in the positioning frame (609). Second nuts (704) are symmetrically and helically sleeved on the second bidirectional lead screw (703). Two groups of positioning rods (706) are respectively fixedly arranged on the sides of the two middle dies (613) close to each other. One end of the positioning rod (706) away from the middle die (613) is fixed to a positioning plate (705), and the positioning plate (705) is fixed to the second nut (704). Among them, a first gear (702) is fixedly arranged on the second bidirectional lead screw (703). An adjusting motor (7) is fixedly arranged on one side of the positioning frame (609). The output end of the adjusting motor (7) is fixedly provided with a second gear (701) meshing with the first gear (702).

6. The flaring device for an extra-large diameter winding pipe according to claim 5, wherein The second adjusting part includes two groups of adjusting seats (608) fixed at both ends of the positioning frame (609), and adjusting shafts (614) fixedly connected to the side mold (612) are respectively rotatably arranged in each adjusting seat (608); Among them, two groups of convex plates (605) are respectively fixedly arranged at both ends of the side close to each other of the two middle molds (613). Hook-shaped limiting plates (606) are rotatably arranged on the convex plates (605), and the other ends of the hook-shaped limiting plates (606) are rotatably connected to the side mold (612).

7. The flaring device for an extra-large diameter winding pipe according to claim 5, characterized in that, The tensioning mold (2) includes a tensioning support (201). A number of groups of tensioning clamps (204) are arranged in a circumferential array on the side of the tensioning support (201) facing the socket mold (3). Tensioning rods (205) are fixedly arranged on the side of each tensioning clamp (204) facing the axis, and each tensioning rod (205) is connected to a tensioning mechanism that drives it to move synchronously in a direction close to or away from the axis.

8. The flaring device for super-large diameter winding pipes according to claim 7, wherein, The tensioning mechanism includes a tensioning motor (208) arranged on the tensioning support (201). The output end of the tensioning motor (208) is fixed to an adjusting disk (210). A number of groups of inclined slots (211) corresponding to the tensioning clamps (204) one by one are circumferentially arrayed on the adjusting disk (210). The inclined slots (211) are inclined from the near-axis end to the far-axis end. Guide shafts (212) fixed to the tensioning rods (205) are slidably embedded in the inclined slots (211); Among them, a guide disk (209) is also fixedly arranged on the tensioning motor (208), and a guide rail (206) for slidably inserting the tensioning rod (205) is arranged on the guide disk (209).

9. The flaring device for an extra-large diameter winding pipe according to claim 8, characterized in that, A mold expanding and revolving motor (207) is also fixedly arranged on the tensioning support (201). The output end of the mold expanding and revolving motor (207) is fixed to the guide disk (209). An expanding mouth mold revolving motor (302) is fixedly arranged on the mounting frame (301), and the output end of the expanding mouth mold revolving motor (302) is fixed to one side of the positioning frame (609).

10. A preparation process for flaring an extra-large diameter winding pipe, characterized in that, Applied to an ultra-large diameter winding pipe expanding device as described in any one of claims 1-9, it includes the following steps: After the tensioning mold (2), the socket mold (3) and the lifting module (6) are installed and debugged, the pipe body (1) is placed on the lifting module (6); The small platform traveling motor (615) drives the pipe body (1) to move towards the socket mold (3). When the pipe body contacts the limiting position of the socket mold (3), the tensioning mold (2) moves towards the pipe body (1). After the tensioning mold (2) enters 2 / 3 of the pipe, the tensioning mold (2) clamps the inside of the pipe body (1); Start the extruder (4). The extruder (4) plasticizes the high-density polyethylene and extrudes it in the form of a sheet through the extrusion die (401). The sheet-shaped polyethylene is initially bonded at a position 20 cm from the pipe port; After winding for one circle, the moving platform frame (5) carries the entire pipe body (1) to move, while the extruder (4) only extrudes the sheet at a fixed position. At this time, the sheet will form a socket with a fixed pitch and a fixed wall thickness that meets the requirements in a spiral shape at the port of the pipe body (1) and the socket mold (3); After the socket is prepared, start the water mist cooling; After the cooling is completed, the tensioning die (2) retracts and drives the pipe body (1) out. At this time, the cutting machine starts to cut off the redundant part of the socket of the pipe body (1); After the cutting is completed, the cutting machine is turned off and reset. The tensioning die (2) contracts and retracts until it is separated from the pipe body (1), leaving the prepared pipe body (1) with the socket joint (101) on the moving platform frame (5); The traveling crane hoists the pipe body (1) to the designated position and places it for final cooling and shaping, and the preparation is completed.

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