Preparation method of seamless heat-insulating elbow pipe of high-density polyethylene and elbow pipe thereof

Abstract

The application discloses a preparation method of seamless heat-preservation elbow pipe of high-density polyethylene and the elbow pipe, relates to the pipe processing technical field, and comprises the following steps: S1, polyethylene particles are poured into an extruder, then are extruded through an annular extrusion pipe, and arc-shaped polyethylene pipelines are processed; meanwhile, cooling water is sprayed for cooling and forming through the cooperation of a water flow transfer box, a spraying pipe, a water suction pipe and a water pump; S2, the cooperation of traction rollers and micro motors is utilized, the structure of the application is scientific and reasonable, the application is safe and convenient to use, a bending and adjusting mechanism is arranged, the diameter of clamping is adjusted through the cooperation of a clamping ring, a rotating drum, a screw rod, clamping blocks and a telescopic sleeve rod, different outer diameters of steel pipes are conveniently clamped and fixed, the steel pipe is prevented from deviating during bending, and the bending effect is ensured; in addition, the clamping ring rotates along with the bending degree of the steel pipe during bending, and is always kept parallel to the cross section of the steel pipe, and the in-out is after bending.

Description

Technical Field

[0001] This invention relates to the field of pipe processing technology, specifically to a method for preparing a seamless insulated bend of high-density polyethylene and the bend thereof. Background Technology

[0002] The seamless polyethylene insulated bend is a multi-layer composite structure with an integrally molded outer protective pipe as the core, combined with an insulation layer and a metal bend. It is a pipe that has sealing, pressure resistance and insulation performance. For example, there is a processing technology for a seamless high-strength stainless steel pipe, application number (CN 202010242525.1). This patent uses a drying chamber to dry the surface of the stainless steel pipe and uniformly applies pressure-sensitive adhesive to the surface of the stainless steel pipe.

[0003] However, during the production process, this patent makes it inconvenient to easily bend steel pipes of different outer diameters as needed, and it cannot make the curvature of the steel pipe bend equal to that of the polyethylene pipe, which affects the effect of subsequent assembly and splicing. Therefore, in order to avoid the above-mentioned technical problems, it is indeed necessary to provide a method for preparing a seamless insulated bend of high-density polyethylene and the bend thereof to overcome the defects in the prior art. Summary of the Invention

[0004] This invention provides a method for preparing a seamless insulated bend of high-density polyethylene and the bend thereof, which can effectively solve the problems mentioned in the background art, such as the inconvenience of bending steel pipes of different outer diameters as needed, and the inability to make the curvature of the steel pipe bend equal to that of the polyethylene pipe, thus affecting the effect of subsequent assembly and splicing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing a seamless insulated bend of high-density polyethylene, comprising the following steps:

[0006] S1. Polyethylene granules are poured into the extruder and then extruded through the annular extrusion tube to process an arc-shaped polyethylene pipe. At the same time, cooling water is sprayed through the water flow transfer box, spray pipe, water pump and water flow transfer box to cool and form the pipe.

[0007] S2. Using the combination of traction rollers and micro motors, the polyethylene pipe is traction and conveyed, so that the polyethylene pipe is embedded inside the semi-ring frame. Then, the polyethylene pipe that meets the processing length is cut by the combination of rotary motor and cutting disc.

[0008] S3. The polyethylene pipe is clamped and fixed by the top rod and arc-shaped clamp on the movable ring, and then the pad is pushed along the ring support to move to one side of the extrusion platform.

[0009] S4. Insert the steel pipe into the clamping ring and fix it. Then start the hydraulic push rod to push the push frame, movable rod, stamping plate and clamping ring to move, so as to facilitate the stamping and bending of the steel pipe.

[0010] S5. Align the bent steel pipe with the polyethylene pipe inside the semi-ring frame to facilitate the steel pipe passing through the polyethylene pipe. Then, clamp and fix it by the top rod and arc-shaped clamp on the fixing ring, so that the polyethylene pipe assembly is sleeved on the outside of the steel pipe.

[0011] S6. Seal both ends of the polyethylene pipe outside the steel pipe, fill the space between the steel pipe and the polyethylene pipe with insulation material, and remove the processed polyethylene insulation bend after the insulation material has solidified.

[0012] According to the above technical solution, one end of the annular support is connected to an extrusion platform, the other end of the annular support is connected to an extruder, and the top of the extrusion platform is provided with a bending and adjusting mechanism, which includes a fixing plate.

[0013] A fixing plate is snapped into one side of the top of the extrusion platform. Push rods are connected to the inside of the fixing plate by threads at equal intervals. The other end of the push rod is rotatably connected to a bending bracket.

[0014] The top of the extrusion platform is provided with sliding grooves on both sides of the bending seat. A positioning rod is engaged inside the sliding groove. A sliding plate is movably sleeved on the outside of the positioning rod. A rotating seat is rotatably connected to one side of the top of the sliding plate. A clamping ring is engaged at the top of the rotating seat. A rotating cylinder is rotatably connected to the inner wall of the clamping ring at equal intervals. A lead screw is threaded inside the rotating cylinder. A clamping block is engaged at the other end of the lead screw, and a telescopic sleeve is symmetrically engaged at one end of the clamping block.

[0015] One end of the clamping ring is rotatably connected to a rotating ring, one end of the rotating ring is engaged with a driving gear ring, and a driven gear ring is fixedly sleeved on the outside of the rotating cylinder;

[0016] Vertical plates are attached to the other side of the top of each of the two slide plates. Push frames are attached to one end of each of the two vertical plates. Movable rods are equidistantly connected inside the push frames. A stamping plate is attached to one end of each movable rod. Support springs are attached to the outer side of the movable rods between the stamping plate and the push frames. Mounting frames are equidistantly connected to the top of the extrusion platform on one side of the push frames. Hydraulic push rods are installed inside the mounting frames.

[0017] According to the above technical solution, the bottom end of the bending seat is slidably connected to the top end of the extrusion platform, the outer side of the slide plate is slidably connected to the inner wall of the slide groove, the other end of the push rod is clamped to a turntable, the clamping block is arc-shaped, the other end of the telescopic sleeve rod is connected to the inner wall of the clamping ring, the axes of the two clamping rings correspond to each other, and the active toothed ring and the driven toothed ring mesh with each other.

[0018] According to the above technical solution, the curvature of the stamping plate and the bending seat is equal to the curvature of the ring bracket. The hydraulic push rod is powered by an external power source, and the other end of the hydraulic push rod is connected to one end of the push frame.

[0019] According to the above technical solution, a spraying and traction cutting mechanism is provided at the top of the annular support near the extruder side, and the spraying and traction cutting mechanism includes an arc-shaped water tank.

[0020] An arc-shaped water tank is installed at the bottom of the ring support near the extruder. An arc-shaped channel is attached to the top of the arc-shaped water tank. A water transfer box is attached to the top of the arc-shaped channel. Spray pipes are attached to the bottom of the water transfer box at equal intervals. A water pump is attached to one end of the arc-shaped water tank and one end of the water transfer box. A water pump is installed on the outside of the water pump.

[0021] An annular extrusion tube is snapped into one end of the extruder at the position corresponding to the inside of the arc-shaped channel, and an arc-shaped baffle is symmetrically snapped into the other end of the annular extrusion tube.

[0022] The arc-shaped channel has horizontal frames equidistantly snapped into its top end. Adjusting rods are symmetrically rotatably connected to the inner wall of the horizontal frames. Adjusting blocks are symmetrically threaded onto the outer side of the adjusting rods. A traction roller is rotatably connected to the bottom end of the adjusting blocks. A support ring is threaded onto the outer side of the traction roller. A micro motor is installed on the top of each adjusting block located on the same side.

[0023] A gantry frame is snapped into position at the top of the annular bracket corresponding to one side of the arc-shaped channel. Electric push rods are symmetrically snapped into the inside of the gantry frame. A lifting frame is threadedly connected to the bottom of the electric push rod. A rotary motor is threadedly connected to one end of the lifting frame. A cutting disc is snapped into one end of the output shaft of the rotary motor.

[0024] According to the above technical solution, the arc-shaped water tank is filled with cooling water, and the curvature of the arc-shaped water tank and the arc-shaped channel are equal to the curvature of the annular support. The water pump is powered by an external electric motor. A connecting groove is opened at the top of the annular support corresponding to the bottom position of the arc-shaped channel. The curvature of the annular extrusion pipe and the arc-shaped baffle are equal to the curvature of the arc-shaped channel.

[0025] According to the above technical solution, the outer side of the adjusting block is slidably connected to the inner wall of the cross frame, the threads at both ends of the adjusting rod rotate in opposite directions, the outer side of the lifting frame is slidably connected to the inner wall of the gantry frame, and the micro motor, electric push rod and rotary motor are all powered by an external power source.

[0026] According to the above technical solution, a clamping assembly mechanism is provided at the middle position of the top of the annular bracket, and the clamping assembly mechanism includes a pad.

[0027] A pad is slidably connected at the middle of the top of the ring bracket. A semi-ring frame is installed at the top of the pad. Fixed rings are symmetrically engaged on the inner wall of the semi-ring frame. Movable rings are equidistantly connected between two fixed rings inside the semi-ring frame. Positioning pins are symmetrically connected to the outer side of the movable rings by threads. Positioning holes are opened on the outer side of the semi-ring frame at the position corresponding to the outer side of the positioning pins.

[0028] Both ends of the fixed ring and both ends of the movable ring are rotatably connected to top rods. The other end of the top rod is rotatably connected to an arc-shaped clamping plate. One end of the arc-shaped clamping plate is engaged with an anti-deviation rod at the position corresponding to the bottom of the top rod.

[0029] According to the above technical solution, the curvature of the pad is equal to that of the ring bracket, the outer side of the positioning pin is adjacent to the inner wall of the positioning hole by a thread, the outer side of the movable ring is slidably connected to the inner wall of the semi-ring frame, the top of the fixed ring and the movable ring are both provided with slots, and the inner wall of the fixed ring and the inner wall of the movable ring are both slidably connected to the outer side of the anti-deviation rod.

[0030] According to the above technical solution, a seamless insulated bend of high-density polyethylene is provided, which is used in a method for preparing a seamless insulated bend of high-density polyethylene.

[0031] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a scientific and reasonable structure and is safe and convenient to use.

[0032] 1. A bending and adjustment mechanism is provided. Through the cooperation of the clamping ring, rotating drum, lead screw, clamping block and telescopic sleeve, the diameter that can be clamped can be adjusted, which can facilitate the clamping and fixing of steel pipes with different outer diameters. During bending, it prevents the steel pipe from shifting and ensures the bending effect. In addition, during bending, the clamping ring will rotate with the curvature of the steel strip and always remain parallel to the cross-section of the steel pipe. After bending, it is easy to pull the steel pipe out from the inside of the clamping ring, ensuring adaptability.

[0033] The combination of push rod, bending seat, hydraulic push rod, push frame, vertical plate, and sliding plate facilitates the movement of the clamping ring and steel pipe. The bending seat and stamping plate work together to easily bend the steel pipe, ensuring its curvature matches that of the bending seat and ring support, and consequently, the polyethylene pipe. Furthermore, the compression of the support spring prevents excessive pressure on the steel pipe, reducing damage and ensuring effective stamping and bending. The push rod allows adjustment of the bending seat position, changing the bending location of the steel pipe to align with the semi-ring support, facilitating subsequent pushing and improving convenience.

[0034] 2. A spraying and traction cutting mechanism is set up. The extruded polyethylene pipe is guided and pulled by the annular extrusion pipe and the arc baffle to form a bend in the polyethylene pipe, which facilitates subsequent assembly. At the same time, the extruded polyethylene bend is sprayed and cooled by a water pump, a water suction pipe, an arc water tank, a water transfer box and a spray pipe. This allows the polyethylene bend to cool and solidify quickly, preventing deformation caused by collisions and ensuring the effect of subsequent assembly. It also increases production efficiency. The water sprayed can be collected and recycled, reducing the waste of resources.

[0035] Next, the adjustment rod, adjustment block, traction roller and micro motor work together to clamp and transport polyethylene bends of different outer diameters, so that the polyethylene bends move in an arc state, making it easy to transport the polyethylene bends into the semi-ring frame, which improves convenience. Furthermore, the polyethylene bends are cut by using a rotary motor and a cutting disc to ensure that the length of the polyethylene bends is less than the length of the steel pipe, which facilitates subsequent assembly and filling.

[0036] 3. A clamping assembly mechanism is set up, which facilitates the sliding of the semi-ring frame with the pad plate and automatically adjusts the position, making it easy to insert polyethylene bends and steel pipes into the semi-ring frame, thus improving adaptability. Through the cooperation of movable rings, top rods, anti-deviation rods and arc-shaped clamps, it is easy to clamp polyethylene bends of different outer diameters, ensuring the stability of polyethylene bends inside the semi-ring frame and reducing shaking. Through the cooperation of positioning pins and positioning holes, it is easy for the movable rings to slide and be positioned inside the semi-ring frame, changing the distance between the movable rings, and thus adjusting the clamping position according to the length of the polyethylene bend, thereby improving adaptability.

[0037] The combination of fixing rings, top rods, anti-deviation rods, and arc-shaped clamps facilitates the clamping and fixing of steel pipes with different outer diameters. It also allows for fine-tuning of the positions of the polyethylene bend and the steel pipe, ensuring that the gap between the polyethylene bend and the steel pipe is equal, which facilitates the subsequent filling of insulation material and guarantees uniformity.

[0038] In summary, through the coordination of the bending and adjusting mechanism, the spraying and traction cutting mechanism, and the clamping assembly mechanism, the polyethylene pipe is quickly formed into an arc-shaped pipe during extrusion. At the same time, the steel pipe is bent into a pipe with the same arc as the polyethylene pipe. This facilitates the fitting of the polyethylene pipe assembly onto the outside of the steel pipe for clamping and fixing, ensuring that the gap between the polyethylene pipe and the steel pipe is equal, guaranteeing the uniformity of subsequent insulation material filling, while also improving processing convenience and increasing production speed. Attached Figure Description

[0039] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0040] In the attached diagram:

[0041] Figure 1 This is a flowchart of the preparation method of the present invention;

[0042] Figure 2 This is a schematic diagram of the installation structure of the fixing plate of the present invention;

[0043] Figure 3 This is a schematic diagram of the bending and adjusting mechanism of the present invention;

[0044] Figure 4 This is a schematic diagram of the installation structure of the rotating base of the present invention;

[0045] Figure 5 This is the present invention. Figure 4 Schematic diagram of the structure of region A in the middle;

[0046] Figure 6 This is a schematic diagram of the installation structure of the arc-shaped water tank of the present invention;

[0047] Figure 7 This is a schematic diagram of the installation structure of the gantry frame of the present invention;

[0048] Figure 8 This is a schematic diagram of the spraying and traction cutting mechanism of the present invention;

[0049] Figure 9 This is a schematic diagram of the clamping assembly mechanism of the present invention.

[0050] The diagram shows: 1. Annular support; 2. Extrusion platform; 3. Extruder.

[0051] 4. Bending and Adjustment Mechanism; 401. Fixed Plate; 402. Push Rod; 403. Bending Holder; 404. Slide Groove; 405. Positioning Rod; 406. Slide Plate; 407. Rotary Seat; 408. Clamping Ring; 409. Rotary Drum; 410. Lead Screw; 411. Clamping Block; 412. Telescopic Sleeve Rod; 413. Rotary Ring; 414. Driving Gear Ring; 415. Driven Gear Ring; 416. Vertical Plate; 417. Push Frame; 418. Movable Rod; 419. Stamping Plate; 420. Support Spring; 421. Mounting Frame; 422. Hydraulic Push Rod;

[0052] 5. Spraying and traction cutting mechanism; 501. Arc-shaped water tank; 502. Arc-shaped channel; 503. Water transfer box; 504. Spray pipe; 505. Water suction pipe; 506. Water pump; 507. Annular extrusion pipe; 508. Arc-shaped baffle; 509. Horizontal frame; 510. Adjusting rod; 511. Adjusting block; 512. Support ring; 513. Traction roller; 514. Micro motor; 515. Gantry frame; 516. Electric push rod; 517. Lifting frame; 518. Rotary motor; 519. Cutting disc;

[0053] 6. Clamping assembly mechanism; 601. Pad; 602. Semi-ring frame; 603. Fixed ring; 604. Movable ring; 605. Positioning pin; 606. Positioning hole; 607. Top rod; 608. Arc-shaped clamping plate; 609. Anti-deviation rod. Detailed Implementation

[0054] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0055] Example: Figure 1-9 As shown, the present invention provides a technical solution, a method for preparing a seamless thermal insulation bend of high-density polyethylene, comprising the following steps:

[0056] S1. Polyethylene granules are poured into the extruder 3 and then extruded through the annular extrusion pipe 507 to process an arc-shaped polyethylene pipe. At the same time, cooling water is sprayed through the water flow transfer box 503, spray pipe 504, water pump 505 and water pump 506 to cool and form the pipe.

[0057] S2. Using the cooperation of traction roller 513 and micro motor 514, the polyethylene pipe is traction and conveyed so that the polyethylene pipe is embedded inside the semi-ring frame 602. Then, the polyethylene pipe that meets the processing length is cut by the cooperation of rotary motor 518 and cutting disc 519.

[0058] S3. The polyethylene pipe is clamped and fixed by the cooperation of the top rod 607 and the arc-shaped clamping plate 608 on the movable ring 604, and then the pad 601 is pushed along the ring bracket 1 to the side of the extrusion platform 2.

[0059] S4. Insert the steel pipe into the clamping ring 408 and fix it. Then start the hydraulic push rod 422 to push the push frame 417, the movable rod 418, the stamping plate 419 and the clamping ring 408 to move, so as to facilitate the stamping and bending of the steel pipe.

[0060] S5. Align the bent steel pipe with the polyethylene pipe inside the semi-ring frame 602 to facilitate the steel pipe passing through the polyethylene pipe. Then, clamp and fix it by the top rod 607 and arc-shaped clamp 608 on the fixing ring 603, so that the polyethylene pipe assembly is sleeved on the outside of the steel pipe.

[0061] S6. Seal both ends of the polyethylene pipe on the outside of the steel pipe, fill the space between the steel pipe and the polyethylene pipe with insulation material, and remove the processed polyethylene insulation bend after the insulation material has solidified.

[0062] One end of the ring support 1 is connected to the extrusion platform 2, and the other end of the ring support 1 is connected to the extruder 3. The top of the extrusion platform 2 is provided with a bending and adjusting mechanism 4, which includes a fixing plate 401.

[0063] A fixing plate 401 is snapped into one side of the top of the extrusion platform 2. Inside the fixing plate 401, push rods 402 are connected at equal intervals by threads. The other end of the push rods 402 is rotatably connected to a bending bracket 403.

[0064] The top of the extrusion platform 2 is provided with a sliding groove 404 on both sides of the bending seat 403. A positioning rod 405 is engaged inside the sliding groove 404. A sliding plate 406 is movably sleeved on the outside of the positioning rod 405. A rotating seat 407 is rotatably connected to one side of the top of the sliding plate 406. A clamping ring 408 is engaged at the top of the rotating seat 407. A rotating cylinder 409 is rotatably connected to the inner wall of the clamping ring 408 at equal intervals. A lead screw 410 is threadedly connected inside the rotating cylinder 409. A clamping block 411 is engaged at the other end of the lead screw 410. A telescopic sleeve 412 is symmetrically engaged at one end of the clamping block 411.

[0065] One end of the clamping ring 408 is rotatably connected to the rotating ring 413, and one end of the rotating ring 413 is engaged with the driving gear ring 414. The outer side of the rotating cylinder 409 is fixedly sleeved with the driven gear ring 415. In order to facilitate the clamping and positioning of the steel pipe, the bottom end of the bending seat 403 is slidably connected to the top end of the extrusion platform 2. The outer side of the slide plate 406 is slidably connected to the inner wall of the slide groove 404. The other end of the push rod 402 is engaged with the turntable. The clamping block 411 is arc-shaped. The other end of the telescopic sleeve rod 412 is connected to the inner wall of the clamping ring 408. The axes of the two clamping rings 408 are corresponding. The driving gear ring 414 and the driven gear ring 415 mesh with each other.

[0066] Vertical plates 416 are attached to the other side of the top of each of the two slide plates 406. Pushing frames 417 are attached to one end of each of the two vertical plates 416. Movable rods 418 are equidistantly connected inside the pushing frame 417. A stamping plate 419 is attached to one end of the movable rod 418. Support springs 420 are attached to the outer side of the movable rod 418 between the stamping plate 419 and the pushing frame 417. Mounting frames 421 are equidistantly connected to the top of the extrusion platform 2 on one side of the pushing frame 417. Hydraulic push rods 422 are installed inside the mounting frames 421. To facilitate bending of the steel pipe, the curvature of the stamping plate 419 and the bending seat 403 is equal to the curvature of the ring bracket 1. The hydraulic push rods 422 are powered by an external power source, and the other end of the hydraulic push rods 422 is connected to one end of the pushing frame 417.

[0067] A spraying and traction cutting mechanism 5 is provided at the top of the ring support 1 near the side of the extruder 3. The spraying and traction cutting mechanism 5 includes an arc-shaped water tank 501.

[0068] An arc-shaped water tank 501 is installed at the bottom of the ring support 1 near the side of the extruder 3. An arc-shaped channel 502 is snapped onto the top of the arc-shaped water tank 501. A water transfer box 503 is snapped onto the top of the arc-shaped channel 502. Spray pipes 504 are snapped onto the bottom of the water transfer box 503 at equal intervals. A water pump 505 is snapped onto one end of the arc-shaped water tank 501 and one end of the water transfer box 503. A water pump 506 is installed on the outside of the water pump 505.

[0069] An annular extrusion tube 507 is snapped into one end of the extruder 3 at the position inside the arc-shaped channel 502, and an arc-shaped baffle 508 is symmetrically snapped into the other end of the annular extrusion tube 507.

[0070] A horizontal frame 509 is equidistantly snapped into the top of the arc-shaped channel 502. An adjusting rod 510 is symmetrically rotatably connected to the inner wall of the horizontal frame 509. An adjusting block 511 is symmetrically threaded onto the outer side of the adjusting rod 510. A traction roller 513 is rotatably connected to the bottom of the adjusting block 511. A support ring 512 is threaded onto the outer side of the traction roller 513. A micro motor 514 is installed on the top of the adjusting block 511 on the same side. To facilitate spraying and cooling the extruded outer sheath, the arc-shaped water tank 501 is filled with cooling water. The arc of the arc-shaped water tank 501 and the arc-shaped channel 502 are equal to the arc of the annular support 1. The water pump 506 is powered by an external electric motor. A connecting groove is opened at the top of the annular support 1 corresponding to the bottom of the arc-shaped channel 502. The arc of the annular extrusion pipe 507 and the arc-shaped baffle 508 are equal to the arc of the arc-shaped channel 502.

[0071] A gantry frame 515 is snapped onto the top of the ring bracket 1 at one side of the arc-shaped channel 502. Electric push rods 516 are symmetrically snapped onto the inside of the gantry frame 515. A lifting frame 517 is threadedly connected to the bottom of the electric push rod 516. A rotary motor 518 is threadedly connected to one end of the lifting frame 517. A cutting disc 519 is snapped onto one end of the output shaft of the rotary motor 518. To facilitate the adjustment of the distance between the two traction rollers 513, the outer side of the adjusting block 511 is slidably connected to the inner wall of the cross frame 509. The threads at both ends of the outer side of the adjusting rod 510 rotate in opposite directions. The outer side of the lifting frame 517 is slidably connected to the inner wall of the gantry frame 515. The micro motor 514, the electric push rod 516, and the rotary motor 518 are all powered by an external power source.

[0072] A clamping assembly mechanism 6 is provided at the middle position of the top of the ring bracket 1. The clamping assembly mechanism 6 includes a pad 601.

[0073] A pad 601 is slidably connected at the middle of the top of the ring bracket 1. A semi-ring bracket 602 is installed at the top of the pad 601. Fixed rings 603 are symmetrically engaged on the inner wall of the semi-ring bracket 602. Movable rings 604 are equidistantly connected between the two fixed rings 603 inside the semi-ring bracket 602. Positioning pins 605 are symmetrically connected to the outer side of the movable rings 604 by threads. Positioning holes 606 are opened on the outer side of the semi-ring bracket 602 at the position corresponding to the outer side of the positioning pins 605.

[0074] Both ends of the fixed ring 603 and both ends of the movable ring 604 are rotatably connected to push rods 607. The other end of the push rod 607 is rotatably connected to an arc-shaped clamping plate 608. One end of the arc-shaped clamping plate 608 is engaged with an anti-deviation rod 609 at the bottom position of the push rod 607. In order to facilitate the assembly of the extruded outer sheath on the outside of the steel pipe, the curvature of the pad 601 is equal to the curvature of the ring bracket 1. The outer side of the positioning pin 605 is adjacent to the inner wall of the positioning hole 606 by threads. The outer side of the movable ring 604 is slidably connected to the inner wall of the semi-ring frame 602. The top ends of the fixed ring 603 and the movable ring 604 are both provided with slots. The inner walls of the fixed ring 603 and the movable ring 604 are slidably connected to the outer side of the anti-deviation rod 609.

[0075] The working principle and usage process of this invention are as follows: First, polyethylene is extruded through extruder 3, and with the cooperation of annular extrusion pipe 507, the extruded polyethylene is formed into a bend. Then, the arc-shaped baffle 508 guides and limits the bend to prevent deformation and ensure the curvature of the polyethylene bend. At the same time, water pump 506 and water suction pipe 505 work together to send water from arc-shaped water tank 501 into water transfer box 503. As the water pressure inside water transfer box 503 increases, the water is sprayed out through spray pipe 504 to cool the polyethylene bend, improving the cooling efficiency and facilitating subsequent processing.

[0076] Next, rotating the adjusting rod 510 pushes the adjusting block 511 and the traction roller 513 to move along the cross frame 509, which facilitates the clamping of polyethylene bends with different outer diameters. The stability of the polyethylene bend is ensured by the support ring 512. Then, the micro motor 514 is started to drive the traction roller 513 to rotate, and the polyethylene bend is pulled and transported, so that the polyethylene bend is transported into the semi-ring frame 602.

[0077] Next, once the polyethylene bend has reached a sufficient length inside the semi-circular frame 602, the lifting frame 517 is lowered by the electric push rod 516, and the polyethylene bend is cut by the cooperation of the rotary motor 518 and the cutting disc 519.

[0078] Furthermore, after the polyethylene bend enters the semi-ring frame 602, the top rod 607 on the movable ring 604 is rotated, and the arc-shaped clamping plate 608 is moved by the limiting of the anti-deviation rod 609, changing the distance between the two arc-shaped clamping plates 608, thus clamping and positioning the polyethylene bend and ensuring the stability of the polyethylene bend inside the semi-ring frame 602. In addition, the cooperation of the positioning pin 605 and the positioning hole 606 facilitates the sliding of the movable ring 604, and the clamping position can be adjusted according to the length of the polyethylene bend, improving adaptability.

[0079] Next, the semi-ring frame 602 and the polyethylene bend are moved along the annular support 1 by the pad 601. One end of the semi-ring frame 602 and the polyethylene bend is close to the extrusion platform 2. Then, the steel pipe is inserted into the clamping ring 408 and the rotating ring 413 is rotated. Through the transmission of the active gear ring 414 and the driven gear ring 415, the rotating cylinder 409 inside the clamping ring 408 is pushed to rotate together, thereby pushing the lead screw 410 and the clamping block 411 to move. At the same time, the clamping block 411 is forced to move by the limiting of the telescopic sleeve rod 412, which makes it convenient to clamp and fix steel pipes with different outer diameters and improves adaptability.

[0080] Next, the push rod 402 is rotated to move the bending seat 403 and adjust the bending position. Then, the hydraulic push rod 422 inside the mounting frame 421 is activated to push the push frame 417, vertical plate 416, slide plate 406, clamping ring 408 and steel pipe to slide along the slide groove 404, forcing the steel pipe to fit against one end of the bending seat 403. Then, with the continuous pushing of the hydraulic push rod 422, the stamping plate 419 and the bending seat 403 cooperate to squeeze and bend the steel pipe, and make the bent steel pipe correspond to the polyethylene bend inside the semi-ring frame 602, ensuring that the arc of the steel pipe is equal to the arc of the polyethylene bend, which facilitates the connection and assembly.

[0081] Finally, during the extrusion and bending process, the clamping ring 408 pushes the steel pipe to rotate along the bend, always keeping it parallel to the cross-section of the steel pipe. This facilitates the rotation of the steel pipe inside the clamping ring 408 after bending, allowing the bent steel pipe to pass through the polyethylene bend inside the semi-ring frame 602. Since the length of the polyethylene bend is less than the length of the steel pipe, after passing through, the top rod 607 on the fixed ring 603 is rotated to push the arc-shaped clamping plate 608 to clamp and position the steel pipe. At the same time, the top rods 607 on the fixed ring 603 and the movable ring 604 are rotated to adjust the position between the polyethylene bend and the steel pipe, making the gap between them equal, which facilitates subsequent filling.

[0082] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method of manufacturing a seamless heat-insulating elbow of high-density polyethylene, characterized by: Including annular support (1), one end of annular support (1) is connected with extrusion platform (2), the other end of annular support (1) is connected with extruder (3), the top of extrusion platform (2) is provided with bending and adjusting mechanism (4), bending and adjusting mechanism (4) includes fixed plate (401); The top of extrusion platform (2) is connected with extrusion platform (2), the other end of annular support (1) is connected with extruder (3), the top of extrusion platform (2) is provided with bending and adjusting mechanism (4), bending and adjusting mechanism (4) includes fixed plate (401); The top of extrusion platform (2) is connected with extrusion platform (2), the other end of annular support (1) is connected with extruder (3), the top of extrusion platform (2) is provided with bending and adjusting mechanism (4), bending and adjusting mechanism (4) includes fixed plate (401); The top of extrusion platform (2) is connected with extrusion platform (2), the other end of annular support (1) is connected with extruder (3), the top of extrusion platform (2) is provided with bending and adjusting mechanism (4), bending and adjusting mechanism (4) includes fixed plate (401); The method comprises the following steps: S1, polyethylene particles are poured into the inside of the extruder (3), and then extruded through the annular extrusion pipe (507), and an arc-shaped polyethylene pipeline is processed, and the water flow is sprayed through the cooperation of the transfer box (503), the spray pipe (504), the water pump (505) and the water pump (506) to cool and form; S2, the polyethylene pipeline is pulled and conveyed by the cooperation of the traction roller (513) and the micro motor (514), so that the polyethylene pipeline is embedded in the semi-ring frame (602), and then the polyethylene pipeline that meets the processing length is cut by the cooperation of the rotary motor (518) and the cutting disc (519); S3, the top rod (607) on the movable ring (604) and the arc-shaped clamping plate (608) are used to clamp and fix the polyethylene pipeline, and then the pad (601) is pushed along the annular support (1) to the side of the extrusion platform (2); S4, the steel pipe is inserted into the clamping ring (408) and fixed, and then the hydraulic push rod (422) is started to push the pushing frame (417), the movable rod (418), the stamping plate (419) and the clamping ring (408) to move, so as to facilitate the stamping and bending of the steel pipe; S5, the bent steel pipe corresponds to the polyethylene pipeline in the semi-ring frame (602), so as to facilitate the steel pipe to pass through the polyethylene pipeline, and then the top rod (607) on the fixed ring (603) and the arc-shaped clamping plate (608) are used to clamp and fix, so that the polyethylene pipeline is combined and sleeved outside the steel pipe; S6, the two ends of the polyethylene pipe movable ring channel outside the steel pipe are blocked, and meanwhile, the thermal insulation material is filled between the steel pipe and the polyethylene pipe, and after the thermal insulation material is solidified, the processed polyethylene thermal insulation elbow pipe is taken down.

2. The method for preparing a seamless insulated bend of high-density polyethylene according to claim 1, characterized in that: Two vertical plates (416) are clamped at the other side of the top end of the two sliding plates (406), one end of the two vertical plates (406) is clamped with a pushing frame (417), a movable rod (418) is movably connected inside the pushing frame (417), one end of the movable rod (418) is clamped with a stamping plate (419), supporting springs (420) are clamped at the positions corresponding to the outer side of the movable rod (418) between the stamping plate (419) and the pushing frame (417), and a mounting frame (421) is equidistantly connected at the position corresponding to one side of the pushing frame (417) at the top end of the extrusion platform (2), and a hydraulic push rod (422) is mounted inside the mounting frame (421).

3. The method for preparing a seamless insulated bend of high-density polyethylene according to claim 2, characterized in that: The bottom end of the bending clamping seat (403) is slidingly connected with the top end of the extrusion platform (2), the outer side of the sliding plate (406) is slidingly connected with the inner wall of the sliding groove (404), the other end of the push rod (402) is clamped with a rotating disc, the clamping block (411) is arc-shaped, the other end of the telescopic sleeve rod (412) is connected with the inner wall of the clamping ring (408), the shaft centers of the two clamping rings (408) correspond to each other, and the driving gear ring (414) and the driven gear ring (415) are meshed with each other.

4. The method for preparing a seamless insulated bend of high-density polyethylene according to claim 2, characterized in that: The curvature of the stamping plate (419) and the bending clamping seat (403) is equal to the curvature of the annular support (1), the hydraulic push rod (422) is powered by an external power supply, and the other end of the hydraulic push rod (422) is connected with one end of the pushing frame (417).

5. The method for preparing a seamless insulated bend of high-density polyethylene according to claim 2, characterized in that: The annular support (1) is provided with a spraying and traction cutting mechanism (5) near one side of the extruder (3) at the top end, the spraying and traction cutting mechanism (5) comprises an arc-shaped water tank (501); The annular support (1) is provided with an arc-shaped water tank (501) near one side of the extruder (3) at the bottom end, the arc-shaped water tank (501) is clamped with an arc-shaped channel (502) at the top end, the arc-shaped channel (502) is clamped with a water flow transfer box (503) at the top end, the water flow transfer box (503) is clamped with a spraying pipe (504) at equal intervals at the bottom end, one end of the arc-shaped water tank (501) and one end of the water flow transfer box (503) are clamped with a water pump (506) outside, and the water pump (506) is installed outside the water pump (505); One end of the extruder (3) is clamped with a ring-shaped extrusion pipe (507) at the position inside the arc-shaped channel (502), and the other end of the ring-shaped extrusion pipe (507) is symmetrically clamped with an arc-shaped baffle (508). The arc-shaped channel (502) is equidistantly clamped with a horizontal frame (509) at the top end, the inner wall of the horizontal frame (509) is symmetrically connected with an adjusting rod (510), the outer side of the adjusting rod (510) is symmetrically sleeved with an adjusting block (511) through threads, the bottom end of the adjusting block (511) is rotatably connected with a traction roller (513), the outer side of the traction roller (513) is sleeved with a supporting ring (512) through threads, and the top end of the adjusting block (511) on the same side is provided with a micro motor (514). The top end of the annular support (1) is clamped with a gantry (515) at a position corresponding to one side of the arc-shaped channel (502), the inner part of the gantry (515) is symmetrically clamped with an electric push rod (516), the bottom end of the electric push rod (516) is connected with a lifting frame (517) through threads, one end of the lifting frame (517) is connected with a rotary motor (518) through threads, and the output shaft of the rotary motor (518) is clamped with a cutting disc (519) at one end.

6. The method for preparing a seamless insulated bend of high-density polyethylene according to claim 5, characterized in that: The arc-shaped water tank (501) is filled with cooling water, the radii of the arc-shaped water tank (501) and the arc-shaped channel (502) are equal to the radius of the annular support (1), the water pump (506) is powered by external electricity, the top end of the annular support (1) is provided with a communication groove at a position corresponding to the bottom of the arc-shaped channel (502), and the radii of the annular extrusion pipe (507) and the arc-shaped baffle (508) are equal to the radius of the arc-shaped channel (502).

7. The method for preparing a seamless insulated bend of high-density polyethylene according to claim 5, characterized in that: The outer side of the adjusting block (511) is slidably connected with the inner wall of the horizontal frame (509), the thread rotation directions of the outer sides of the two ends of the adjusting rod (510) are opposite, the outer side of the lifting frame (517) is slidably connected with the inner wall of the gantry (515), and the micro motor (514), the electric push rod (516) and the rotary motor (518) are all powered by external power sources.

8. The method for preparing a seamless insulated bend of high-density polyethylene according to claim 2, characterized in that: A clamping combination mechanism (6) is arranged at the top end of the annular support (1), the clamping combination mechanism (6) comprises a backing plate (601); The top end of the annular support (1) is slidably connected with a backing plate (601), the top end of the backing plate (601) is provided with a half ring frame (602), the inner wall of the half ring frame (602) is symmetrically clamped with a fixed ring (603), and the inner part of the half ring frame (602) is movably connected with a movable ring (604) at equal intervals between the two fixed rings (603), the outer side of the movable ring (604) is symmetrically connected with a positioning pin (605) through threads, and the outer side of the half ring frame (602) is provided with a positioning hole (606) at a position corresponding to the outer side of the positioning pin (605). The two ends of the fixed ring (603) and the two ends of the movable ring (604) are rotatably connected with a jacking rod (607), the other end of the jacking rod (607) is rotatably connected with an arc-shaped clamping plate (608), and one end of the arc-shaped clamping plate (608) is clamped with an anti-deviation rod (609) at a position corresponding to the bottom end of the jacking rod (607).

9. The method for preparing a seamless insulated bend of high-density polyethylene according to claim 8, characterized in that: The curvature of the gusset (601) is equal to the curvature of the annular support (1), the outer side of the positioning pin (605) is adjacent to the inner wall of the positioning hole (606) through threads, the outer side of the movable ring (604) is slidably connected to the inner wall of the half ring support (602), the top of the fixed ring (603) and the movable ring (604) is provided with a notch, and the inner wall of the fixed ring (603) and the inner wall of the movable ring (604) are slidably connected to the outer side of the anti-deviation rod (609).

Images