Flaring control method and device for heat preservation pipe machining and sleeving

Abstract

The invention provides a flaring control method and device for heat preservation pipe machining and sleeving, the flaring control device comprises an outer protection pipe positioning table and a steel pipe traction mechanism, the steel pipe traction mechanism and the outer protection pipe positioning table are oppositely arranged in the horizontal direction, and a flaring mechanism is arranged between the steel pipe traction mechanism and the outer protection pipe positioning table; the acting end of the flaring mechanism faces the outer protective pipe positioning table, the flaring mechanism is used for radially flaring the penetrating end opening of the outer protective pipe, and the flaring mechanism comprises a supporting frame, a movable driving assembly and a flaring assembly; the movable driving assembly and the flaring assembly are both assembled and installed on the supporting frame, and the output end of the movable driving assembly is connected with the flaring assembly through a first connecting rod. According to the flaring device, flaring plates in the flaring assembly are driven by the moving driving assembly to move into the outer protective pipe, the positioned outer protective pipe does not need to be moved or adjusted for the second time in the whole process, radial flaring is carried out on a penetrating end opening of the outer protective pipe through radial telescopic movement of the multiple groups of flaring plates, and a steel pipe can be guided into the outer protective pipe more easily and smoothly.

Description

Technical Field

[0001] This invention relates to the field of thermal insulation pipe processing equipment technology, specifically to a method and device for controlling the flaring of thermal insulation pipes during the sleeve processing. Background Technology

[0002] As a key pipeline component for transporting fluids, insulated pipes typically consist of an inner pressure-bearing steel pipe, an outer protective polyethylene outer sheath, and a rigid polyurethane foam insulation layer filling the gap between the two. The rigid polyurethane foam, with its excellent closed-cell structure and thermal conductivity, effectively blocks heat transfer, while the polyethylene outer sheath provides waterproofing, corrosion resistance, and impact resistance for both the insulation layer and the steel pipe. Together, these three elements ensure the long-term service performance of the insulated pipe.

[0003] Currently, the process of preparing insulated pipes includes: positioning and alignment, positioning the outer protective pipe made of polyethylene material on the processing table and the steel pipe on the traction device to ensure that the axis of the steel pipe is precisely aligned with the axis of the outer protective pipe; traction and insertion, starting the traction device to allow the steel pipe to be uniformly introduced into the interior of the outer protective pipe; and insulation layer filling, injecting rigid polyurethane foam into the annular gap formed by the two.

[0004] Currently, in the process of inserting the inner steel pipe into the outer protective pipe, the inner diameter of the outer protective pipe and the outer diameter of the steel pipe must be designed with a slight dimensional difference to achieve the annular gap required for insertion and foaming. However, in actual industrial production, the outer protective pipe end has a straight structure with a right-angle transition, which causes the front end face of the steel pipe to make pushing contact with the outer protective pipe end, making it difficult to insert the steel pipe, and also easily causing the outer protective pipe to bend or crack during assembly. Summary of the Invention

[0005] In view of this, the problem to be solved by the present invention is to provide a method and device for controlling the flaring of insulation pipes during the processing of insulation pipes, which has the characteristics of good synchronization between multiple flaring plates and high flaring accuracy.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A method for controlling the flaring of insulation pipes during the fabrication and sheathing process includes: An outer protective pipe is placed on an outer protective pipe positioning platform, and a steel pipe traction mechanism is arranged opposite to the outer protective pipe positioning platform. Adjust the position of the flaring mechanism so that each flaring plate extends into the outer protective tube; Obtain the nominal inner diameter of the outer sheath and the target flaring inner diameter. Combine the transmission parameters of the flaring drive unit in the flaring mechanism to calculate the theoretical expansion and contraction of multiple flaring plates, and convert them into the theoretical driving amount of the flaring drive motor. Based on the preset flaring synchronization adjustment strategy, each flaring drive motor is driven so that each flaring plate squeezes the inner wall of the outer protective tube to complete the flaring operation. After the flaring is completed, the flaring drive motor drives each flaring plate in reverse, causing the flaring plate to detach from the outer protective tube.

[0007] A device for processing and inserting insulation pipes includes an outer sheath positioning platform and a steel pipe traction mechanism. The steel pipe traction mechanism and the outer sheath positioning platform are arranged opposite each other in the horizontal direction. The device is characterized in that a flaring mechanism is provided between the steel pipe traction mechanism and the outer sheath positioning platform, with the working end of the flaring mechanism facing the outer sheath positioning platform, for radially flaring the insertion port of the outer sheath. The flaring mechanism includes a support frame, a moving drive assembly, and a flaring assembly. The support frame serves as the mounting base, and both the moving drive assembly and the flaring assembly are mounted on the support frame. The output end of the moving drive assembly is connected to the flaring assembly via a first connecting rod, driving the flaring assembly to move linearly back and forth.

[0008] Furthermore, the flaring synchronization adjustment strategy includes: The contact pressure is obtained, specifically the extrusion pressure between each flared plate and the outer protective plate. Obtain the load torque, specifically the load torque of each flared drive motor. Based on the collected contact pressure and load torque, the expansion and contraction synchronization deviation of each flared plate is determined. If the expansion and contraction synchronization deviation exceeds the preset deviation threshold, the driving amount of the flared drive motor that is insufficient or excessive in expansion and contraction is corrected.

[0009] Furthermore, the adjustment steps for the drive quantity of the flared drive motor include: If the actual driving amount of the flaring drive motor reaches the theoretical driving amount, and the corresponding collected contact pressure is less than the first preset ratio of the pressure average, then it is determined that the corresponding flaring plate extension is insufficient, and the driving amount of the corresponding flaring drive motor is increased until the contact pressure falls into the first compliant average range. If the actual driving amount of the flaring drive motor does not reach the theoretical driving amount, and the corresponding collected contact pressure is higher than the second preset ratio of the average pressure, and the corresponding collected load torque is higher than the third preset ratio of the average load torque, then it is determined that the corresponding flaring plate extension is excessive. The driving amount of the corresponding flaring drive motor is reduced, and the operating speed of the flaring drive motor is reduced until the contact pressure falls into the second compliant average range and the torque load falls into the third compliant average range.

[0010] Furthermore, it is also equipped with a group-based adjustment control strategy, including: Based on the distribution of the flaring plates, at least two flaring groups are defined, wherein the flaring plates in each flaring group are evenly distributed circumferentially. Data was collected for each flaring group, and the flaring synchronization adjustment strategy was executed accordingly. Once the contact pressure and load torque adjustment within each flaring group are completed, the average pressure and load are calculated. The fluctuation deviation of the average pressure and load between each flaring group is then determined, and the entire flaring group is adjusted synchronously.

[0011] Furthermore, the group adjustment control strategy also includes inter-group sequential adjustment rules and abnormal protection steps. The inter-group sequential adjustment rules include adjusting the groups in order of deviation magnitude when there are two or more flared groups that need adjustment. After one group of adjustment is completed and verified to meet the standard, the next group of adjustment is started. The abnormal protection steps include pausing the adjustment of a group if the contact pressure or load torque of a single flaring plate in a certain flaring group exceeds the preset abnormal threshold of the average value in the group, and recording the location and parameters of the abnormal flaring plate.

[0012] Furthermore, the flaring assembly includes an annular frame, multiple sets of flaring plates, and flaring drive units corresponding to each flaring plate. The annular frame has a hollow annular structure, and multiple sets of flaring drive units are radially distributed along the circumference of the annular sidewall of the annular frame. The multiple sets of flaring drive units are equally spaced on the outer sidewall of the annular frame, and the power output end of the flaring drive unit passes through the annular sidewall of the annular frame and is connected to the corresponding flaring plate, driving the flaring plate to synchronously extend and retract along the radial direction of the annular frame.

[0013] The power output direction of the flaring drive unit is set radially along the annular frame, which is consistent with the arrangement direction of each corresponding flaring plate. It drives all flaring plates to move synchronously along the radial direction of the annular frame, thereby adjusting the inner diameter of the enclosed area and realizing the adaptation flaring operation of the outer protective pipe sleeve port.

[0014] Furthermore, the flaring drive unit includes a flaring drive motor and a screw. The screw is disposed in a mounting shell with a hollow cylindrical guide cavity, and the mounting shell is fixed to the outer wall of the annular frame by bolts. The output end of the motor is connected to the screw through a transmission structure, driving the screw to move linearly back and forth. One end of the screw extends out of the mounting shell and passes through the annular frame, and is connected to the flaring plate through a bearing.

[0015] The motor's output end is connected to the screw via a transmission structure, converting the motor's rotational motion into the screw's linear motion.

[0016] Furthermore, the transmission structure includes a worm gear and a worm, the output end of the motor is connected to the worm, and the end of the worm away from the motor is mounted on the mounting housing via a rolling bearing. The worm and the worm wheel are meshed and connected. The two ends of the worm wheel's axle are mounted in the mounting housing through rolling bearings. The central axis of the worm wheel is collinear with the axis of the screw. The center of the worm wheel has an internal threaded hole that penetrates its wheel body. The screw is threaded through and connected to the internal threaded hole of the worm wheel.

[0017] Furthermore, the surface of the flared plate near the inner wall of the annular frame is provided with an arc-shaped surface structure, which is used to contact the inner wall of the outer protective tube.

[0018] The surface of the flared plate that comes into contact with the inner wall of the outer sheath is designed as an arc shape, making it easier to fit the inner wall of the outer sheath.

[0019] Furthermore, the upper and lower ends of the ring frame are respectively connected to the corresponding moving drive assembly via the first connecting rod. The moving drive assembly includes a drive motor, a lead screw, and a fixed seat for mounting the lead screw. The fixed seat is fixed to the support frame by bolts. The fixed seat has a moving groove. The lead screw is mounted in the moving groove by bearings, and one end of the lead screw passes through the fixed seat and is connected to the output shaft of the drive motor via a coupling. A moving block is threaded onto the lead screw, and the moving block is adapted to be installed in the moving groove.

[0020] The drive motor drives the lead screw to rotate in both directions. Through the screw and the moving block's helical transmission, the rotational motion is converted into the linear motion of the moving block. The moving block drives the ring frame and the entire flaring assembly to move synchronously through the first connecting rod, realizing the flaring action of the flaring assembly feeding the outer protective tube and the reset action after flaring.

[0021] Furthermore, two sets of guide components are symmetrically arranged on both sides of the support frame. Each guide component includes a guide rod and a guide block. One end of the guide rod is fixedly welded to the support frame, and the other end is fixedly connected to the limiting plate by welding. The guide block has a guide hole that matches the guide rod, and the guide block is fitted onto the guide rod. The guide block is connected to the ring frame through a second connecting rod. The two sets of guide components provide precise guidance and constraint for the movement of the ring frame.

[0022] Furthermore, the first connecting rod and the second connecting rod have the same structure, with one end of both near the ring frame fixedly connected to the outer wall of the ring frame, the end of the first connecting rod away from the ring frame fixedly connected to the moving block, and the end of the second connecting rod away from the ring frame fixedly connected to the guide block.

[0023] The advantages and positive effects of this invention are: (1) The flaring mechanism designed in this invention includes a moving drive component for driving the flaring component to move and a flaring component for radially flaring the outer sheath through the sleeve port. The moving drive component drives the flaring component to move toward the outer sheath through the sleeve port, and the flaring plate in the flaring component extends into the inner wall of the outer sheath. The whole process does not require secondary movement or adjustment of the already positioned outer sheath, which solves the problem of long positioning time caused by the frequent movement of the outer sheath in traditional processing, simplifies the operation process, effectively shortens the single flaring cycle, and thus improves processing efficiency.

[0024] (2) The present invention uses the radial expansion and contraction of multiple flaring plates in the flaring assembly to radially flare the outer sheath through the sleeve port, and process the original straight port into a horn-shaped transition structure. This horn-shaped structure significantly increases the effective inner diameter of the outer sheath through the sleeve port, making the size difference between it and the outer diameter of the steel pipe larger, thus making it easier for the steel pipe to be smoothly introduced into the outer sheath, and also greatly avoiding the steel pipe and the outer sheath from forming a pushing contact.

[0025] (3) This invention uses a dual-parameter acquisition and deviation judgment strategy of contact pressure and load torque. Compared with the traditional single-parameter control, it can more comprehensively and accurately identify the expansion and contraction synchronization deviation of each flared plate, avoiding misjudgment caused by relying solely on pressure or torque. For insufficient expansion and contraction, precise control is adopted by increasing the driving amount, reducing the driving amount, and slowing down, respectively, to ensure that the extrusion pressure of all flared plates on the inner wall of the outer protective tube is uniform and consistent. This effectively solves the problems of elliptical outer protective tube port and localized force concentration caused by poor synchronization in traditional flaring, and reduces the roundness error of the port after flaring. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is an overall structural diagram of a heat insulation pipe processing and sleeve-insertion device according to the present invention; Figure 2 This is a front view of the flaring mechanism of a heat insulation pipe processing and sleeve-insertion device according to the present invention; Figure 3 This is an enlarged view of point A of the insulation pipe processing and sleeve-fitting device of the present invention; Figure 4 This is a side view of the flaring mechanism of a heat insulation pipe processing and sleeve-insertion device according to the present invention; Figure 5 This is a partial view of the flaring assembly of the flaring mechanism of a heat insulation pipe processing and sleeve-insertion device according to the present invention; Figure 6 This is a schematic cross-sectional view of the mounting shell of the flaring mechanism of a heat insulation pipe processing sleeve-insulating device according to the present invention. In the diagram: 1. Outer protective tube positioning platform; 2. Steel pipe traction mechanism; 3. Flaring mechanism; 31. Support frame; 32. Moving drive assembly; 321. Drive motor; 322. Lead screw; 323. Fixed seat; 324. Moving block; 33. Flaring assembly; 331. Ring frame; 332. Flaring plate; 333. Flaring drive unit; 3331. Motor; 3332. Screw; 3333. Mounting shell; 3334. Worm gear; 3335. Worm; 34. Guide rod; 35. Guide block; 36. Limiting plate; 4. First connecting rod; 5. Second connecting rod. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] like Figures 1 to 6 As shown, the present invention provides a device for processing and inserting insulation pipes, including an outer protective pipe positioning platform 1 and a steel pipe traction mechanism 2. The steel pipe traction mechanism 2 and the outer protective pipe positioning platform 1 are arranged opposite each other in the horizontal direction. A flaring mechanism 3 is provided between the steel pipe traction mechanism 2 and the outer protective pipe positioning platform 1. The working end of the flaring mechanism 3 faces the outer protective pipe positioning platform 1 and is used for radial flaring of the outer protective pipe sleeve port. The flaring mechanism 3 includes a support frame 31, a moving drive component 32, and a flaring component 33. The support frame 31 serves as the mounting base, and the moving drive component 32 and the flaring component 33 are both mounted on the support frame 31. The output end of the moving drive component 32 is connected to the flaring component 33 through the first connecting rod 4, driving the flaring component 33 to move linearly back and forth.

[0031] It should be noted that the outer protective pipe positioning platform 1 and the steel pipe traction mechanism 2 are existing equipment, so their specific structures will not be described in detail.

[0032] like Figure 2 As shown, the flaring assembly 33 includes a ring frame 331, multiple sets of flaring plates 332, and flaring drive parts 333 corresponding to the flaring plates 332. The ring frame 331 has a hollow ring structure. Multiple sets of flaring drive units 333 are radially distributed along the circumference of the annular sidewall of the ring frame 331. The multiple sets of flaring drive units 333 are equally spaced on the outer sidewall of the ring frame 331. The power output end of the flaring drive unit 333 passes through the annular sidewall of the ring frame 331 and is connected to the corresponding flaring plate 332. The power output direction of the flaring drive unit 333 is arranged radially along the ring frame 331, which is consistent with the arrangement direction of each corresponding flaring plate 332. The flaring drive unit 333 drives all the flaring plates 332 to move synchronously along the radial direction of the ring frame 331, thereby adjusting the inner diameter of the enclosed area and realizing the fitting flaring operation of the outer protective pipe sleeve port.

[0033] Furthermore, the surface of the flared plate 332 near the inner wall of the ring frame 331 is provided with an arc-shaped surface structure. This arc-shaped surface structure is used to contact the inner wall of the outer protective tube, making it easier to fit with the inner wall of the outer protective tube.

[0034] like Figure 5 A partial schematic diagram shows that the flaring drive unit 333 includes a flaring drive motor 3331 and a screw 3332. The screw 3332 is housed within a mounting shell 3333, which has a hollow cylindrical guide cavity. The mounting shell 3333 is bolted to the outer wall of the annular frame 331. The output end of the flaring drive motor 3331 is connected to the screw 3332 via a transmission structure, driving the screw 3332 to move linearly reciprocally. One end of the screw 3332 extends from the mounting shell 3333, passes through the annular frame 331, and is connected to the flaring plate 332 via a bearing. It should be noted that the flaring drive motors 3331 in the multiple flaring drive units 333 should be synchronously controlled to achieve synchronous radial reciprocating movement of the multiple flaring plates 332 along the annular frame 331.

[0035] Among them, such as Figure 6As shown in the cross-sectional view, the transmission structure used in the flaring drive unit 333 includes a worm gear 3334 and a worm 3335. The output end of the flaring drive motor 3331 is connected to the worm 3335. The end of the worm 3335 away from the flaring drive motor 3331 is mounted on the mounting housing 3333 via a rolling bearing. The worm 3335 is meshed with the worm gear 3334. The two ends of the worm gear 3334 are mounted in the mounting housing 3333 through rolling bearings. The central axis of the worm gear 3334 is collinear with the axis of the screw 3332. The center of the worm gear 3334 has an internal threaded hole that passes through its wheel body. The screw 3332 is threadedly connected to the internal threaded hole of the worm gear 3334.

[0036] The rotation of the flaring drive motor 3331 is reversed through the transmission structure so that it is in the same direction as the screw 3332. The flaring drive motor 3331 drives the worm 3335 to rotate. When the worm wheel 3334 is driven to rotate by the worm 3335, the rotational motion of the worm wheel 3334 is converted into the linear reciprocating motion of the screw 3332 along its own axis through the helical engagement between the internal thread of the worm wheel 3334 and the external thread of the screw 3332, thereby driving the flaring plate 332 to achieve radial expansion and contraction.

[0037] like Figure 3 As shown, the upper and lower ends of the ring frame 331 are respectively connected to the corresponding moving drive assembly 32 through the first connecting rod 4. The moving drive assembly 32 includes a drive motor 321, a lead screw 322, and a fixed seat 323 for mounting the lead screw 322. The fixed seat 323 is fixed to the support frame 31 by bolts. A moving groove is provided on the fixed seat 323. The lead screw 322 is installed in the moving groove through a bearing. One end of the lead screw 322 passes through the fixed seat 323 and is connected to the output shaft of the drive motor 321 through a coupling. A moving block 324 is threaded on the lead screw 322 and is adapted to be installed in the moving groove.

[0038] The two drive motors 321 in the two sets of moving drive components 32 must also be synchronously controlled to ensure that the ring frame 331 is subjected to balanced force and to avoid tilting during movement. During operation, the drive motor 321 drives the lead screw 322 to rotate in both directions. Through the screw 322 and the moving block 324, the rotational motion is converted into the linear motion of the moving block 324. The moving block 324 drives the ring frame 331 and the entire flaring assembly 33 to move synchronously through the first connecting rod 4, realizing the feeding and flaring action of the flaring assembly 33 to the outer protective tube and the reset action after flaring.

[0039] And such as Figure 4As shown, the flaring mechanism 3 also includes two sets of guide components, which provide precise guidance and constraint for the movement of the ring frame 331. The two sets of guide components are symmetrically arranged on both sides of the support frame 31. The guide components include guide rods 34 and guide blocks 35. One end of the guide rod 34 is fixedly welded to the support frame 31, and the other end is fixedly connected to the limiting plate 36 by welding. The guide block 35 has a guide hole that matches the guide rod 34. The guide block 35 is fitted on the guide rod 34 and is connected to the ring frame 331 through the second connecting rod 5.

[0040] Furthermore, the first connecting rod 4 used to connect the moving drive assembly 32 to the ring frame 331 and the second connecting rod 5 used to connect the guide assembly to the ring frame 331 have the same structure. The ends of both are fixedly connected to the outer wall of the ring frame 331 at the end closest to the ring frame 331. The end of the first connecting rod 4 away from the ring frame 331 is fixedly connected to the moving block 324, and the end of the second connecting rod 5 away from the ring frame 331 is fixedly connected to the guide block 35.

[0041] This application also provides a method for controlling the flaring of the insulation pipe during processing, wherein the outer protective pipe is set on the outer protective pipe positioning platform 1, and the steel pipe is set on the steel pipe traction mechanism 2 arranged opposite to the outer protective pipe positioning platform 1. Adjust the position of the flaring mechanism 3 so that each flaring plate 332 extends into the outer protective tube; Obtain the nominal inner diameter of the outer protective tube and the target flared inner diameter. Combine the transmission parameters of the flaring drive unit 333 in the flaring mechanism 3 to calculate the theoretical extension and retraction of multiple flaring plates 332, and convert them into the theoretical driving amount of the flaring drive motor 3331. Based on the preset flaring synchronization adjustment strategy, each flaring drive motor 3331 is driven, so that each flaring plate 332 squeezes the inner wall of the outer protective tube to complete the flaring operation. After the flaring is completed, the flaring drive motor 3331 drives each flaring plate 332 in reverse, causing the flaring plate 332 to detach from the outer protective tube.

[0042] This application requires the addition of pressure and torque sensors. An encoder is installed inside the motor 3331, and the main data comes from the above three sensors. The pressure sensor is located on the contact surface between the flared plate 332 and the outer protective tube, and the torque sensor is located on the output shaft of the motor 3331. The improved device significantly enhances the flaring synchronization, greatly improves the adjustment stability and accuracy, strengthens the adaptability to abnormal working conditions and the safety of the equipment, simplifies the operation process, improves processing efficiency, and has strong adaptability and wide applicability.

[0043] A method for controlling the flaring of insulation pipes during the fabrication and sheathing process includes: The outer protective pipe is placed on the outer protective pipe positioning platform 1, and the steel pipe is placed on the steel pipe traction mechanism 2 arranged opposite to the outer protective pipe positioning platform 1. Adjust the position of the flaring mechanism 3 so that each flaring plate 332 extends into the outer protective tube; Obtain the nominal inner diameter of the outer protective tube and the target flared inner diameter. Combine the transmission parameters of the flaring drive unit 333 in the flaring mechanism 3 to calculate the theoretical extension and retraction of multiple flaring plates 332, and convert them into the theoretical driving amount of the flaring drive motor 3331. Based on the preset flaring synchronization adjustment strategy, each flaring drive motor 3331 is driven, so that each flaring plate 332 squeezes the inner wall of the outer protective tube to complete the flaring operation. After the flaring is completed, the flaring drive motor 3331 drives each flaring plate 332 in reverse, causing the flaring plate 332 to detach from the outer protective tube.

[0044] Furthermore, the flaring synchronization adjustment strategy includes: The contact pressure is obtained, specifically the extrusion pressure between each flared plate 332 and the outer protective plate. Obtain the load torque, specifically the load torque of each flared drive motor 3331. Based on the collected contact pressure and load torque, the telescopic synchronization deviation of each flared plate 332 is determined. If the telescopic synchronization deviation exceeds the preset deviation threshold, the driving amount of the flared drive motor 3331 is corrected if the telescopic amount is insufficient or excessive.

[0045] Furthermore, the adjustment steps for the drive quantity of the flared drive motor 3331 include: If the actual driving amount of the flaring drive motor 3331 reaches the theoretical driving amount, and the corresponding collected contact pressure is less than the first preset ratio of the pressure average, then it is determined that the extension and retraction of the corresponding flaring plate 332 is insufficient, and the driving amount of the corresponding flaring drive motor 3331 is increased until the contact pressure falls into the first compliant average range. If the actual driving amount of the flared drive motor 3331 does not reach the theoretical driving amount, and the corresponding collected contact pressure is higher than the second preset ratio of the average pressure, and the corresponding collected load torque is higher than the third preset ratio of the average load torque, then it is determined that the extension and retraction of the corresponding flared plate 332 is excessive. The driving amount of the corresponding flared drive motor 3331 is reduced, and the operating speed of the flared drive motor 3331 is reduced until the contact pressure falls into the second compliant average range and the torque load falls into the third compliant average range.

[0046] Furthermore, it is also equipped with a group-based adjustment control strategy, including: Based on the distribution of the flaring plates 332, at least two flaring groups are defined, wherein the flaring plates 332 in each flaring group are evenly distributed circumferentially. Data was collected for each flaring group, and the flaring synchronization adjustment strategy was executed accordingly. Once the contact pressure and load torque adjustment within each flaring group are completed, the average pressure and load are calculated. The fluctuation deviation of the average pressure and load between each flaring group is then determined, and the entire flaring group is adjusted synchronously.

[0047] Furthermore, the group adjustment control strategy also includes inter-group sequential adjustment rules and abnormal protection steps. The inter-group sequential adjustment rules include adjusting the groups in order of deviation magnitude when there are two or more flared groups that need adjustment. After one group of adjustment is completed and verified to meet the standard, the next group of adjustment is started. The abnormal protection steps include pausing the adjustment of a group if the contact pressure or load torque of a single flaring plate 332 in a certain flaring group exceeds the preset abnormal threshold of the average value in the group, and recording the position and parameters of the abnormal flaring plate 332.

[0048] The working principle and process of this invention are as follows: The flaring mechanism designed in this invention needs to be assembled between the outer protective tube positioning platform 1 and the steel pipe traction mechanism 2, such as... Figure 1 As shown, the flaring mechanism includes a movement drive assembly 32 for moving the flaring assembly 33 and a flaring assembly 33 for radially flaring the outer sheath tube through-hole. Before the outer sheath is inserted, the outer sheath is transported to the outer sheath positioning platform 1 and the positioning operation is completed, and the corresponding steel pipe is located on the steel pipe traction mechanism 2. The position adjustment of the flaring assembly is achieved by synchronously controlling the start of the drive motors 321 in the two sets of moving drive assemblies 32, which drive the lead screw 322 to rotate. Through the screw drive between the lead screw 322 and the moving block 324, the rotational motion is converted into the linear motion of the moving block 324. The moving block 324 drives the ring frame 331 and the entire flaring assembly 33 mounted on the ring frame 331 to move synchronously toward the outer protective tube through the first connecting rod 4. This allows the flaring plate 332 in the flaring assembly 33 to extend into the inner wall of the outer protective tube. The entire process does not require secondary movement or adjustment of the already positioned outer protective tube, solving the problem of long positioning time caused by frequent repositioning of the outer protective tube in traditional processing. This simplifies the operation process, effectively shortens the single flaring cycle, and thus improves processing efficiency. The outer sheath is flared at the port, and simultaneously the flaring drive motors 3331 in all flaring drive units 333 are activated. The flaring drive motors 3331 drive the worm gear 3335 to rotate. The meshing transmission between the worm gear 3335 and the worm wheel 3334 causes the worm wheel 3334 to rotate. Through the helical engagement between the internal thread of the worm wheel 3334 and the external thread of the screw 3332, the rotational motion of the worm wheel 3334 is converted into the linear reciprocating motion of the screw 3332 along its own axis. This drives the flaring plate 332 to achieve radial telescopic movement, completing the flaring of the outer sheath through-hole. The original straight-mouth structure of the port is processed into a flared transition structure. This flared structure significantly increases the effective inner diameter of the outer sheath through-hole, making the size difference between it and the outer diameter of the steel pipe larger. This makes it easier for the steel pipe to be smoothly introduced into the outer sheath and also avoids the situation where the steel pipe and the outer sheath form a pushing contact. After the sleeve is inserted and reset, the flaring drive motors 3331 in all the flaring drive units 332 are controlled to reverse synchronously, so that the flaring plate 332 is separated from the inner wall of the outer protective tube. Then, the drive motors 321 in the two sets of moving drive components 32 are controlled to reverse, so as to drive the ring frame 331 and the flaring component 33 to reset and move. Then, the steel pipe traction mechanism 2 is started to move the steel pipe and complete the sleeve insertion operation.

[0049] The flaring control method involved in this application operates during the flaring process by activating the moving drive component 32 of the flaring mechanism 3, which drives the ring frame 331 and all flaring plates 332 to slowly feed along the axial direction of the outer protective tube. The encoder monitors the feeding depth of the flaring plates 332 in real time. When the feeding depth approaches the preset safety distance at the port of the outer protective tube, the moving drive component 32 automatically reduces the feeding speed to avoid collision between the flaring plates 332 and the port of the outer protective tube. When the pressure sensor detects the contact pressure signal for the first time, it determines that the flaring plates 332 have contacted the inner wall of the outer protective tube, and the moving drive component 32 pauses feeding to complete the position adjustment of the flaring plates 332 extending into the outer protective tube.

[0050] Then the controller acquires the nominal inner diameter and target flaring inner diameter parameters of the outer sheath tube, and combines them with the transmission parameters of the flaring drive unit 333, such as the screw pitch and transmission ratio of the screw 3332, to calculate the theoretical expansion and contraction amount required for each group of flaring plates 332 through a preset algorithm; then the theoretical expansion and contraction amount is converted into the theoretical driving amount of the flaring drive motor 3331, and the initial drive command is sent to all flaring drive motors 3331 to lay the foundation for subsequent flaring operations.

[0051] Next, intra-group synchronization adjustment is performed. According to the preset flaring group division, data acquisition and synchronization adjustment are performed on each flaring group separately. For a single flaring group, the contact pressure of all flaring plates 332 and the load torque of the corresponding flaring drive motor 3331 within the group are collected in real time. The average pressure and average torque within the group are calculated. The contact pressure and load torque of each flaring plate 332 within the group are compared with the average values ​​within the group. Combined with a preset proportional threshold, it is determined whether there is insufficient or excessive synchronization deviation in the expansion and contraction of each flaring plate 332. For flaring plates 332 with insufficient expansion and contraction, the drive amount of the corresponding flaring drive motor 3331 is increased until its contact pressure falls into the preset first compliant average value range. For flaring plates 332 with excessive expansion and contraction, the drive amount of the corresponding flaring drive motor 3331 is reduced, and the operating speed of the motor 3331 is decreased until its contact pressure and load torque both fall into the corresponding compliant average value range, completing the intra-group synchronization adjustment.

[0052] Then, inter-group adjustments are performed. After all flaring groups have completed intra-group synchronous adjustments, the overall average pressure and overall average torque of all flaring plates 332 are calculated. The intra-group average pressure and intra-group average torque of each group are compared with the overall average to determine whether the fluctuation deviation of inter-group pressure and torque exceeds the preset threshold. If the fluctuation deviation exceeds the standard, the entire flaring group with the deviation exceeds the standard and the driving amount of all flaring drive motors 3331 in the group is corrected until the deviation between the average of each group and the overall average meets the requirements, ensuring that the flaring of the outer protective tube port is uniform.

[0053] When there are two or more flared groups that need to be adjusted between groups, the adjustment is started in sequence according to the rule of prioritizing the group with the larger deviation. After one group of adjustment is completed and verified to meet the standard, the next group of adjustment is started. This avoids the disturbance of circumferential pressure or torque caused by multiple groups being adjusted at the same time, and ensures the stability of the adjustment process. During the adjustment process within or between groups, the contact pressure and load torque of a single flaring plate 332 within the group are monitored in real time. If the parameters of a certain flaring plate 332 exceed the preset abnormal threshold of the average value within the group, the adjustment operation of that group is immediately suspended, while the normal flaring operation of other flaring groups without abnormalities is retained. At the same time, the position, current driving amount and related sensor data of the abnormal flaring plate 332 are recorded. After the flaring operation is completed, a prompt is issued to the operator to facilitate timely troubleshooting and avoid abnormal expansion affecting the overall flaring effect.

[0054] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of this patent.

Claims

1. A method for controlling the flaring of insulation pipes during the processing of insulated pipes, characterized in that, include: The outer protective pipe is placed on the outer protective pipe positioning platform (1), and the steel pipe is placed on the steel pipe traction mechanism (2) arranged opposite to the outer protective pipe positioning platform (1); Adjust the position of the flaring mechanism (3) so that each flaring plate (332) extends into the outer protective tube; Obtain the nominal inner diameter of the outer protective tube and the target flaring inner diameter. Combine the transmission parameters of the flaring drive unit (333) in the flaring mechanism (3) to calculate the theoretical extension and retraction of multiple flaring plates (332) and convert them into the theoretical driving amount of the flaring drive motor (3331). Based on the preset flaring synchronization adjustment strategy, each flaring drive motor (3331) is driven so that each flaring plate (332) squeezes the inner wall of the outer protective tube to complete the flaring operation. After the flaring is completed, the flaring drive motor (3331) drives each flaring plate (332) in reverse so that the flaring plate (332) is disengaged from the outer protective tube.

2. The method for controlling the flaring of a heat-insulating pipe during processing and sheathing as described in claim 1, characterized in that, The flaring synchronous adjustment strategy includes: The contact pressure is obtained, specifically the extrusion pressure between each flared plate (332) and the outer protective plate. Obtain the load torque, specifically the load torque of each flared drive motor (3331). Based on the collected contact pressure and load torque, the telescopic synchronization deviation of each flared plate (332) is determined. If the telescopic synchronization deviation exceeds the preset deviation threshold, the driving amount of the flared drive motor (3331) that is insufficient or excessive in telescopic extension is corrected.

3. The method for controlling the flaring of a heat-insulating pipe during processing and sheathing as described in claim 2, characterized in that, The adjustment steps for the driving amount of the flared drive motor (3331) include: If the actual driving amount of the flaring drive motor (3331) reaches the theoretical driving amount, and the corresponding collected contact pressure is less than the first preset ratio of the pressure average, then it is determined that the extension and retraction of the corresponding flaring plate (332) is insufficient, and the driving amount of the corresponding flaring drive motor (3331) is increased until the contact pressure falls into the first compliant average range. If the actual driving amount of the flared drive motor (3331) does not reach the theoretical driving amount, and the corresponding collected contact pressure is higher than the second preset ratio of the pressure average, and the corresponding collected load torque is higher than the third preset ratio of the load torque average, then it is determined that the expansion and contraction of the corresponding flared plate (332) is excessive, the driving amount of the corresponding flared drive motor (3331) is reduced, and the operating speed of the flared drive motor (3331) is reduced until the contact pressure falls into the second compliant average range and the torque load falls into the third compliant average range.

4. The method for controlling the flaring of a heat-insulating pipe during processing and sleeve insertion as described in claim 2, characterized in that, It is also equipped with a group adjustment control strategy, including: Based on the distribution of the flaring plates (332), at least two flaring groups are defined, wherein the flaring plates (332) in the flaring groups are evenly distributed around the circumference. Data was collected for each flaring group, and the flaring synchronization adjustment strategy was executed for each group. Once the contact pressure and load torque adjustment within each flaring group are completed, the average pressure and load are calculated. The fluctuation deviation of the average pressure and load between each flaring group is then determined, and the entire flaring group is adjusted synchronously.

5. The method for controlling the flaring of a heat-insulating pipe during processing and sheathing as described in claim 4, characterized in that, The group adjustment control strategy also includes inter-group sequential adjustment rules and abnormal protection steps. The inter-group sequential adjustment rules include adjusting the groups in order of deviation size when there are two or more flared groups that need to be adjusted. After one group of adjustment is completed and verified to meet the standard, the next group of adjustment is started. The abnormal protection steps include pausing the adjustment of a group if the contact pressure or load torque of a single flaring plate (332) in a flaring group exceeds the preset abnormal threshold of the average value in the group, and recording the position and parameters of the abnormal flaring plate (332).

6. A device for processing and inserting insulation pipes, employing the flaring control method for processing and inserting insulation pipes as described in any one of claims 1-5, comprising an outer protective pipe positioning platform (1) and a steel pipe traction mechanism (2), wherein the steel pipe traction mechanism (2) and the outer protective pipe positioning platform (1) are arranged opposite each other in the horizontal direction, characterized in that: A flaring mechanism (3) is provided between the steel pipe traction mechanism (2) and the outer protective pipe positioning platform (1). The working end of the flaring mechanism (3) faces the outer protective pipe positioning platform (1) and is used for radial flaring of the outer protective pipe sleeve port. The flaring mechanism (3) includes a support frame (31), a moving drive assembly (32), and a flaring assembly (33). The support frame (31) serves as the mounting base. The moving drive assembly (32) and the flaring assembly (33) are both mounted on the support frame (31). The output end of the moving drive assembly (32) is connected to the flaring assembly (33) via a first connecting rod (4). The flaring assembly (33) includes several flaring plates (332).

7. The insulation pipe processing and sleeve-insertion device according to claim 6, characterized in that, The flaring assembly (33) includes a ring frame (331) and a flaring drive unit (333) corresponding to the flaring plate (332); The ring frame (331) has a hollow ring structure. Multiple sets of flaring drive parts (333) are radially distributed on the annular sidewall of the ring frame (331) along its circumference. The multiple sets of flaring drive parts (333) are equally spaced on the outer sidewall of the ring frame (331). The power output end of the flaring drive part (333) passes through the annular sidewall of the ring frame (331) and is connected to the corresponding flaring plate (332), driving the flaring plate (332) to move synchronously along the radial direction of the ring frame (331).

8. The insulation pipe processing and sleeve-insertion device according to claim 7, characterized in that, The flaring drive unit (333) includes a flaring drive motor (3331) and a screw (3332). The screw (3332) is disposed in a mounting shell (3333) with a hollow cylindrical guide cavity. The mounting shell (3333) is fixed to the outer wall of the ring frame (331) by bolts. The output end of the flaring drive motor (3331) is connected to the screw (3332) through a transmission structure, driving the screw (3332) to move linearly back and forth. One end of the screw (3332) extends out from the mounting shell (3333) and passes through the ring frame (331) before being connected to the flaring plate (332) through a bearing.

9. The insulation pipe processing and sleeve-insertion device according to claim 8, characterized in that, The transmission structure includes a worm gear (3334) and a worm (3335). The output end of the motor is connected to the worm (3335). The worm (3335) is meshed with the worm gear (3334). The two ends of the axle of the worm gear (3334) are mounted in the mounting housing (3333) through rolling bearings. The central axis of the worm gear (3334) is collinear with the axis of the screw (3332). The center of the worm gear (3334) is provided with an internal threaded hole that penetrates its wheel body. The screw (3332) is threaded through and connected to the internal threaded hole of the worm gear (3334).

10. The insulation pipe processing and sleeve-insertion device according to claim 7, characterized in that, The flared plate (332) has an arc-shaped surface structure on the side near the inner wall of the ring frame (331), which is used to contact the inner wall of the outer protective tube.

Images