Elbow straightening equipment and straightening method thereof

Abstract

The invention relates to the technical field of bent pipe straightening, and discloses bent pipe straightening equipment and a straightening method.The bent pipe straightening equipment comprises a frame body assembly, supporting vertical plates are arranged on the frame body assembly in parallel, a bearing assembly is arranged at one end of each supporting vertical plate, a sizing assembly is arranged at the other end of each supporting vertical plate, and a guide block is arranged on each sizing assembly; a supporting assembly is arranged on the guide block, an elastic assembly is arranged on the bearing assembly, an oil receiving box is arranged on the frame assembly, a pre-straightening assembly is arranged on the supporting vertical plate, and a cleaning assembly is arranged on the sizing assembly. According to the bending pipe pre-straightening device, the bearing assembly is arranged to bear and clamp the bending pipe, the bending pipe is limited, and the bending pipe is assisted to enter the pre-straightening assembly smoothly; the bent pipes with different diameters are clamped and fixed by arranging the elastic assembly; the supporting assembly is arranged to support the bent pipe, the bent pipe is prevented from being in a horizontal state when entering the sizing assembly, and the situation that the bent pipe obliquely enters the sizing assembly to affect the diameter reducing effect is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of bent pipe straightening, and in particular to a bent pipe straightening device and a straightening method thereof. Background Art

[0002] Straightening machines are equipment for straightening metal profiles, bars, pipes, wires, etc. Straightening machines use straightening rollers to squeeze bars and other materials to change their straightness. Generally, there are two rows of straightening rollers, with varying numbers. The main types include pressure straightening machines, balance roller straightening machines, shoe roller straightening machines, rotary reverse bending straightening machines, etc.

[0003] The Chinese invention patent with application number 201810516097.X proposes a pipe bending straightening machine, including a frame and a power distribution control box arranged on the frame, a conveying support plate is vertically arranged in the middle of the frame, a driving motor and a rolling device that cooperate with each other are arranged on the right side of the conveying support plate, a feed clamping device is arranged on the right side of the rolling device on the conveying support plate, and a straightening mechanism is arranged on the left side of the rolling device on the frame, and the straightening mechanism includes a first guide device and a second guide device arranged on the left side of the conveying support plate; by arranging a feed clamping device at the feed port of the rolling device, the pipe can be automatically clamped to prevent the pipe from rotating during the roller straightening process, thereby effectively solving the problem of spiral bending of the pipe.

[0004] However, in the prior art, the bent pipe is generally placed in a coil. During the process of placing the bent pipe, the diameter of the coil gradually decreases, resulting in a continuous change in the angle between the bent pipe and the entrance of the straightening mechanism, which causes the bent pipe to be unstable when entering the straightening mechanism. In addition, after the bent pipe is straightened, during the process of reducing the diameter, the bent pipe enters the reducing mechanism through the straightening mechanism. During this process, the weight of the bent pipe itself will cause it to sink, causing the bent pipe to tilt and enter the reducing mechanism, thereby causing wear on the surface of the bent pipe, affecting the effect after the reduction.

[0005] Therefore, it is necessary to solve the above problems by a bend straightening device. Summary of the invention

[0006] The object of the present invention is to provide a bent pipe straightening device and a straightening method thereof to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bend straightening device, comprising a frame assembly, a support vertical plate is arranged on the frame assembly in parallel, a support assembly is arranged at one end of the support vertical plate, a sizing assembly is arranged at the other end of the support vertical plate, a guide block is arranged on the sizing assembly, a support assembly is arranged on the guide block, an elastic assembly is arranged on the support assembly, an oil receiving box is arranged on the frame assembly, a pre-straightening assembly is arranged on the support vertical plate, and a cleaning assembly is arranged on the sizing assembly; The elastic component comprises a moving ring, one side of the moving ring is connected to a moving column, a buffer spring is arranged on the outer side of the moving column, and one end of the moving column away from the moving ring is slidably connected to a support block; The support assembly comprises a movable block and a positioning block, an active rotating rod is rotatably arranged between the movable blocks, a passive rotating rod is rotatably arranged between the positioning blocks, and a roller is rotatably connected between the passive rotating rod and the active rotating rod.

[0008] Preferably, the cleaning assembly includes a cleaning plate, a rotating motor is provided on one side of the cleaning plate, a rotating plate is hinged at one end of the rotating motor, a swing arm is rotatably provided on the rotating plate, an adjustment motor is provided at the end of the swing arm, the output end of the adjustment motor passes through the swing arm and the rotating plate in sequence and is connected to a telescopic cylinder, and a blocking plate is provided at the output end of the telescopic cylinder.

[0009] Preferably, one end of the swing arm away from the rotating plate is rotatably connected to a U-shaped seat, a swing motor is fixedly provided on one side of the U-shaped seat, one end of the U-shaped seat is fixedly connected to a rotating gear ring, the rotating gear ring is meshed with a gear, and the gear is connected to a drive motor.

[0010] Preferably, a guide hole is provided on the guide block, the support assembly is installed in the guide hole, a micro cylinder is connected to any of the movable blocks and the movable block radially opposite thereto, the micro cylinder is installed on the edge of the guide hole through a right-angle plate, and the movable block and the positioning block are evenly arranged along the radial direction of the guide hole; one end of the buffer spring is fixedly connected to the movable ring, and the other end is fixedly connected to the movable column.

[0011] Preferably, the supporting assembly includes a fixed roller and a movable roller, the central axes of the fixed roller and the movable roller are both provided with rotating shafts, support vertical plates are provided on both sides of the fixed roller and the movable roller, transverse through holes and vertical through holes are provided on the support vertical plates, both ends of the rotating shaft on the fixed roller are provided in the vertical through holes, the rotating shaft on the movable roller is provided in the transverse through holes, square plates are provided at the ends of the vertical through holes, support screws are rotatably provided on the central axis of the square plates, the ends of the support screws are provided at the bottom of the rotating shafts at both ends of the fixed roller, a support box is provided between the support vertical plates, a support plate is fixedly provided on the support box, a supporting cylinder is fixedly provided on the support plate, and a round through hole is provided on the supporting cylinder.

[0012] Preferably, the sizing assembly includes a reducing block, both ends of the reducing block are provided with limiting vertical plates, both sides of the limiting vertical plates are provided with fixed horizontal plates, the fixed horizontal plates are installed on the supporting vertical plates through vertical screws, the supporting vertical plates are provided with mounting blocks, an oil supply box is provided between the mounting blocks, and an oil outlet pipe is provided on the oil supply box.

[0013] Preferably, the pre-straightening assembly includes pre-straightening rollers, which are located between the supporting uprights and are arranged in two rows. The two rows of pre-straightening rollers are arranged at intervals, and a left movable plate and a right movable plate are respectively arranged at the bottom of the two rows of pre-straightening rollers. A telescopic cylinder is arranged on the supporting upright close to the right movable plate, and the output end of the telescopic cylinder passes through the supporting upright and is connected to an active translation block, which is respectively arranged at the bottom of the left movable plate and the right movable plate, and an adjusting handwheel is arranged on the supporting upright close to the left movable plate, a screw rod is fixedly connected to the adjusting handwheel, and the screw rod is rotatably arranged on the supporting upright.

[0014] Preferably, the active translation block is rotatably connected to the screw rod, a thread is provided at one end of the screw rod close to the adjusting hand wheel, a thread matching with the screw rod is provided in the active translation block located below the left movable plate, passive translation blocks are provided on both sides of the active translation block, auxiliary rods are provided on both sides of the screw rod, and the passive translation block is slidably provided on the auxiliary rods.

[0015] Preferably, the frame assembly includes a supporting frame body, a mounting seat is fixedly provided on the supporting frame body, a transverse extension plate and a longitudinal extension plate are provided on the mounting seat, the transverse extension plate and the longitudinal extension plate are respectively provided with vertical support plates, the vertical support plates are rotatably connected with transverse screws, the supporting vertical plates are parallelly arranged on the supporting frame body, the ends of the transverse screws are screwed into the supporting vertical plates, partition plates and bottom plates are fixedly provided between the supporting vertical plates, and the bottom plate is provided with lower oil holes.

[0016] The invention also discloses a straightening method of a bent pipe straightening device, comprising the following steps: Step 1: Position the bent pipe. The bent pipe passes through the supporting assembly. The supporting assembly limits and clamps the bent pipe to ensure that the position of the bent pipe is stable when it enters the pre-straightening assembly. Step 2: Pre-straightening of the bent pipe. The bent pipe passes between two rows of pre-straightening rollers. The two rows of pre-straightening rollers are driven closer to each other by the telescopic cylinder to clamp and straighten the bent pipe. The clamping force of the bent pipe is fine-tuned by adjusting the hand wheel. Step 3: Pull and reduce the diameter. The bent pipe is pulled by an external traction machine. After the bent pipe passes through the pre-straightening component, the guide block determines the height position of the bent pipe before it enters the sizing component, and then enters the sizing component to complete the diameter reduction.

[0017] Technical effects and advantages of the present invention: 1. In the present invention, a supporting component is provided to support and clamp the bent pipe, limit the position of the bent pipe, and assist the bent pipe to smoothly enter the pre-straightening component; an elastic component is provided to clamp and fix the bent pipes of different diameters; a supporting component is provided to support the bent pipe to prevent the bent pipe from being in a horizontal state when entering the sizing component, thereby avoiding tilting when entering the sizing component to affect the diameter reduction effect.

[0018] 2. In the present invention, fixed rollers and movable rollers are provided to clamp and limit the bent pipe, ensuring that the bent pipe enters the pre-straightening assembly at an angle parallel to the pre-straightening assembly, thereby ensuring the stability of the bent pipe during pre-straightening. Buffer springs are provided to assist the reciprocating movement of the movable roller to accommodate bent pipes of different diameters passing between the fixed roller and the movable roller. At the same time, the compression amount of the buffer spring can reflect the current diameter of the bent pipe.

[0019] 3. In the present invention, by setting a positioning block, a movable block and a roller, the movement of the movable block drives the active rotating rod to rotate, and the active rotating rod drives the passive rotating rod to rotate synchronously toward the central axis of the guide block, thereby driving the roller to close to the outer surface of the bent pipe, supporting the bent pipe, avoiding wear caused by the bent pipe tilting through the guide block, and ensuring that the bent pipe enters the reducing hole in a horizontal straight line state for diameter reduction.

[0020] 4. In the present invention, by setting a cleaning plate, multiple functions can be realized under different conditions. When the cleaning plate is parallel to the moving direction of the bent pipe, as the cleaning plate rotates in a circle, the cleaning plate scrapes the lubricating oil on the surface of the bent pipe to ensure that the lubricating oil is evenly distributed on the surface of the bent pipe. At the same time, the debris on the surface of the bent pipe can be scraped off to prevent the debris from getting stuck at the junction of the conical hole and the cylindrical hole and causing scratches on the surface of the bent pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the present invention from another angle; Figure 3It is a schematic diagram of the supporting assembly structure of the present invention; Figure 4 for Figure 3 A schematic diagram of the structure enlargement of part A; Figure 5 This is a schematic diagram of the structure of the pre-straightening assembly of the present invention; Figure 6 It is a schematic diagram of the structure of the pre-straightening assembly of the present invention from another angle; Figure 7 This is a schematic diagram of the structure of the sizing component of the present invention; Figure 8 It is a schematic diagram of the structure of the frame assembly of the present invention; Fig. 9 This is a schematic diagram of the support assembly structure of the present invention; Fig.10 This is a schematic diagram of the cleaning component structure of the present invention; Fig.11 It is a partial structural schematic diagram of the cleaning component of the present invention.

[0022] In the figure: 1. frame assembly; 101. support frame; 102. mounting seat; 103. longitudinal extension plate; 104. transverse extension plate; 105. vertical support plate; 106. transverse screw; 107. partition plate; 108. bottom plate; 109. lower oil hole; 2. supporting assembly; 201. movable roller; 202. fixed roller; 203. support vertical plate; 204. square plate; 205. support screw; 206. support box ; 207, support plate; 208, support cylinder; 209, round through hole; 210, transverse through hole; 211, vertical through hole; 212, rotating shaft; 3, pre-straightening assembly; 301, pre-straightening roller; 302, left moving plate; 303, telescopic cylinder; 304, adjusting hand wheel; 305, active translation block; 306, screw rod; 307, auxiliary rod; 308, passive translation block; 309, right moving plate; 4, guide block; 5, Sizing assembly; 501, reducing block; 502, limiting vertical plate; 503, fixed horizontal plate; 504, vertical screw; 505, mounting block; 506, oil supply box; 507, oil outlet pipe; 6, supporting assembly; 601, movable block; 602, positioning block; 603, passive rotating rod; 604, active rotating rod; 605, roller; 606, micro cylinder; 607, right angle plate; 7, elastic assembly; 701, moving ring; 702, moving column; 703, buffer spring; 704, supporting block; 8, cleaning assembly; 801, cleaning plate; 802, rotating motor; 803, rotating plate; 804, swing arm; 805, telescopic cylinder; 806, blocking plate; 807, adjusting motor; 808, rotating gear ring; 809, gear; 810, driving motor; 811, swing motor; 812, U-shaped seat; 9, supporting vertical plate; 10, oil collecting box. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] In order to solve the problem that during the process of laying the bent pipe, the diameter of the coil gradually decreases, resulting in a constant change in the angle between the bent pipe and the entrance of the pre-straightening component 3, which makes the bent pipe unstable when entering the pre-straightening component 3, and the weight of the bent pipe itself causes it to sink, causing the bent pipe to tilt through the guide hole, resulting in wear on the surface of the bent pipe, embodiment 1 is proposed. Embodiment 1

[0025] like Figures 1 to 7 As shown, the present invention provides a bent pipe straightening device, including a frame assembly 1, a supporting upright plate 9 is arranged in parallel on the frame assembly 1, a supporting assembly 2 is arranged at one end of the supporting upright plate 9, a sizing assembly 5 is arranged at the other end of the supporting upright plate 9, a guide block 4 is arranged on the sizing assembly 5, a supporting assembly 6 is arranged on the guide block 4, an elastic assembly 7 is arranged on the supporting assembly 2, an oil collecting box 10 is arranged on the frame assembly 1, and a pre-straightening assembly 3 is arranged on the supporting upright plate 9.

[0026] By setting the supporting component 2, the bent pipe is supported and clamped, the bent pipe is limited, and the bent pipe is assisted to smoothly enter the pre-straightening component 3; the bent pipes of different diameters are clamped and fixed by setting the elastic component 7; the bent pipe is supported by setting the supporting component 6 to prevent the bent pipe from being in a horizontal state when entering the sizing component 5, so as to avoid tilting when entering the sizing component 5 to affect the diameter reduction effect.

[0027] Before the bent pipe enters the pre-straightening component 3 for straightening, it is stored in a coil state and is pulled by an external traction machine, and the bent pipe is passively released. During the release process, the diameter of the entire coil gradually shrinks, resulting in a constant change in the angle between the bent pipe and the entrance of the pre-straightening component 3, which causes the bent pipe to be unstable when entering the pre-straightening component 3.

[0028] In order to solve the above technical problems, in this embodiment, Figure 3-Figure 4 As shown, the support component 2 is provided to limit the position of the bent pipe to ensure that the bent pipe enters the pre-straightening component 3 in a horizontal straight line, and the elastic component 7 is provided to adaptively clamp the bent pipes of different diameters. Figure 3As shown, the supporting assembly 2 includes a fixed roller 202 and a movable roller 201, and a rotating shaft 212 is arranged on the central axis of the fixed roller 202 and the movable roller 201. The fixed roller 202 and the movable roller 201 are both rotatably arranged on the rotating shaft 212. The bent pipe passes through the fixed roller 202 and the movable roller 201 through the round through hole 209 on the supporting cylinder 208. The fixed roller 202 supports the bent pipe, and the movable roller 201 clamps the bent pipe. The two cooperate to complete the positioning of the bent pipe before pre-straightening. Support vertical plates 203 are arranged on both sides of the fixed roller 202 and the movable roller 201. The support vertical plates 203 are arranged with transverse through holes 210 and vertical through holes 211. The two ends of the rotating shaft 212 on the fixed roller 202 are arranged in the vertical through holes 211, and the rotating shaft 212 on the movable roller 201 is arranged in the transverse through holes 210; the ends of the vertical through holes 211 are provided with square plates 204, and the center of the square plates 204 A support screw 205 is rotatably arranged on the axis, and the end of the support screw 205 is arranged at the bottom of the rotating shaft 212 on the fixed roller 202. The support screw 205 supports the rotating shaft 212 on the fixed roller 202, and the height position of the fixed roller 202 can also be adjusted by rotating the support screw 205. A support box 206 is arranged between the support vertical plates 203, and a support plate 207 is fixedly arranged on the support box 206. A supporting cylinder 208 is fixedly arranged on the support plate 207, and a round through hole 209 is arranged on the supporting cylinder 208. The round through hole 209 limits the bent pipe to a certain position height, cooperates with the fixed roller 202 and the movable roller 201, so that the bent pipe can maintain an angle parallel to the pre-straightening component 3 and enter from the entrance of the pre-straightening component 3. The diameter of the round through hole 209 is much larger than the diameter of the bent pipe, and an elastic pad is arranged in the round through hole 209 to prevent the bent pipe from rubbing against the inner wall of the round through hole 209 to cause scratches.

[0029] When in use, the bent pipe is passed through the round through hole 209, and then passed between the fixed roller 202 and the movable roller 201. The movable roller 201 moves adaptively according to the diameter of the bent pipe. When the movable roller 201 moves, it drives the movable ring 701 to move, thereby compressing the buffer spring 703. The buffer spring 703 drives the movable roller 201 to reversely press the bent pipe, so that the bent pipe enters the pre-straightening component 3 at an angle parallel to the pre-straightening component 3, ensuring that the bent pipe enters the pre-straightening component 3 stably.

[0030] like Figure 4 As shown, the elastic component 7 includes a moving ring 701, one side of the moving ring 701 is connected to a moving column 702, a buffer spring 703 is arranged on the outer side of the moving column 702, and one end of the moving column 702 away from the moving ring 701 is slidably connected to a support block 704; one end of the buffer spring 703 is fixedly connected to the moving ring 701, and the other end is fixedly connected to the moving column 702.

[0031] During use, when bent pipes of different diameters pass between the fixed roller 202 and the movable roller 201, the bent pipe will generate thrust on the movable roller 201, so that the movable roller 201 drives the movable ring 701 to move toward the support block 704, thereby compressing the buffer spring 703. The elastic force of the buffer spring 703 itself causes the movable roller 201 to clamp the bent pipe, ensuring that the bent pipe enters the pre-straightening component 3 in a horizontal straight state.

[0032] When the movable roller 201 moves along the transverse hole 210, the compression amount of the buffer spring 703 changes. At this time, the distance between the movable roller 201 and the fixed roller 202 changes. The compression amount of the buffer spring 703 is matched with the distance between the fixed roller 202 and the movable roller 201 to obtain the current diameter of the bent pipe. Specifically, the compression deformation distance of the buffer spring 703 plus the initial horizontal projection distance between the center axis of the movable roller 201 and the center axis of the fixed roller 202 is a right angle side, the vertical projection distance between the center axis of the movable roller 201 and the center axis of the fixed roller 202 is another right angle side, and the distance between the center axis of the movable roller 201 and the center axis of the fixed roller 202 is the hypotenuse. The compression deformation distance of the buffer spring 703, the initial horizontal projection distance between the center axis of the movable roller 201 and the center axis of the fixed roller 202, and the vertical projection distance between the center axis of the movable roller 201 and the center axis of the fixed roller 202 are all known values. Therefore, according to the formula for the side length of the right triangle, the actual distance between the center axis of the movable roller 201 and the center axis of the fixed roller 202 can be converted to obtain the diameter of the bent pipe.

[0033] By setting the fixed roller 202 and the movable roller 201 to clamp and limit the bent pipe, it is ensured that the bent pipe enters the pre-straightening component 3 at an angle parallel to the pre-straightening component 3, thereby ensuring the stability of the bent pipe during pre-straightening; by setting the buffer spring 703, the movable roller 201 is assisted to move back and forth to adapt to bent pipes of different diameters passing between the fixed roller 202 and the movable roller 201. At the same time, the compression amount of the buffer spring 703 can reflect the current diameter of the bent pipe.

[0034] When straightening a bent pipe, usually pre-straightening is performed first, and then the diameter reduction is performed. Pre-straightening can be performed by extrusion straightening by straightening rollers. In this embodiment, Figure 5-Figure 6As shown, the bent pipe is pre-straightened by setting two rows of pre-straightening rollers 301. The pre-straightening assembly 3 includes pre-straightening rollers 301. The pre-straightening rollers 301 are located between the supporting uprights 9 and are arranged in two rows. The two rows of pre-straightening rollers 301 are arranged at intervals. The bent pipe passes through the middle of the two rows of pre-straightening rollers 301. The bottoms of the two rows of pre-straightening rollers 301 are respectively provided with a left movable plate 302 and a right movable plate 309. A telescopic cylinder is provided on the supporting upright 9 near the right movable plate 309. 303, the output end of the telescopic cylinder 303 penetrates the supporting vertical plate 9 and is connected to the active translation block 305, the output end of the telescopic cylinder 303 is extended and retracted, driving the active translation block 305 to slide along the screw rod 306, the active translation block 305 is respectively arranged at the bottom of the left moving plate 302 and the right moving plate 309, and an adjusting hand wheel 304 is arranged on the supporting vertical plate 9 near the left moving plate 302, and a pressure gauge is arranged on the adjusting hand wheel 304 for measuring the current pre-correction pressure of the two rows The pressure of the straight roller 301 on the bent pipe is adjusted by fixing a screw rod 306 on the adjusting hand wheel 304, and the screw rod 306 is rotatably arranged on the supporting vertical plate 9; the active translation block 305 is rotatably connected to the screw rod 306, and a thread is arranged on the end of the screw rod 306 close to the adjusting hand wheel 304, and a thread matching with the screw rod 306 is arranged in the active translation block 305 under the left movable plate 302, and the adjusting hand wheel 304 rotates to drive the screw rod 306 to rotate, thereby The active translation block 305 located below the left moving plate 302 is driven to move along the threaded end of the screw rod 306. Passive translation blocks 308 are arranged on both sides of the active translation block 305. Auxiliary rods 307 are arranged on both sides of the screw rod 306. The passive translation block 308 is slidably arranged on the auxiliary rods 307. When the active translation block 305 moves, the passive translation block 308 is driven to slide along the auxiliary rods 307 through the left moving plate 302 and the right moving plate 309 respectively.

[0035] When in use, the compression amount of the buffer spring 703 reflects the current diameter of the bent pipe, controls the output end of the telescopic cylinder 303 to extend, drives the right movable plate 309 to move, thereby drives the pre-straightening roller 301 on the right movable plate 309 to approach the pre-straightening roller 301 on the left movable plate 302, until the two rows of pre-straightening rollers 301 clamp the bent pipe, and the pressure on the current bent pipe can be checked by adjusting the pressure indicator on the hand wheel 304. If the pressure needs to be adjusted, the hand wheel 304 can be turned to drive the screw rod 306 to rotate, and the screw rod 306 drives the active translation block 305 located under the left movable plate 302 to move along the screw rod 306, thereby adjusting the pressure on the bent pipe.

[0036] During the straightening process of the bent pipe, the bent pipe will be pulled through the sizing assembly 5 by an external drawing machine to reduce the diameter of the bent pipe. While reducing the diameter of the bent pipe, the wall thickness of the bent pipe can also be uniform. Figure 7As shown, the sizing component 5 includes a reducing block 501, which is provided with a reducing hole. The entrance side of the reducing hole is set as a conical hole, and the exit side is set as a cylindrical hole. A floating core head is set in the elbow to assist the reducing block 501 to complete the diameter reduction. Limiting vertical plates 502 are set at both ends of the reducing block 501, and fixed horizontal plates 503 are set on both sides of the limiting vertical plates 502. The fixed horizontal plates 503 are installed on the supporting vertical plates 9 through vertical screws 504. Mounting blocks 505 are set on the supporting vertical plates 9. Oil supply boxes 506 are set between the mounting blocks 505. Oil outlet pipes 507 are set on the oil supply boxes 506. There are two oil outlet pipes 507, which are respectively set on the entrance sides of the reducing block 501 and the guide block 4 to pour oil on the surface of the elbow, so as to play a lubricating role when the elbow passes through the reducing block 501 and the guide block 4.

[0037] When in use, the bent pipe passes through the guide block 4 and then the reducing hole. As the bent pipe moves slowly, the oil supply box 506 is started to output the lubricating oil from the oil outlet pipe 507, and the lubricating oil is poured on the surface of the bent pipe, thereby lubricating the bent pipe and preventing the bent pipe from being scratched due to excessive friction when passing through the guide block 4 and the reducing hole of the reducing block 501.

[0038] like Figure 8 As shown, the frame assembly 1 includes a support frame 101, on which a mounting seat 102 is fixedly provided, on which a transverse extension plate 104 and a longitudinal extension plate 103 are provided, on which the transverse extension plate 104 and the longitudinal extension plate 103 are respectively provided with vertical support plates 105, on which transverse screws 106 are rotatably connected, and support vertical plates 9 are arranged in parallel on the support frame 101, and the ends of the transverse screws 106 are screwed into the support vertical plates 9, and partition plates 107 and bottom plates 108 are fixedly provided between the support vertical plates 9, and the partition plates 107 partition the pre-straightening components 3, the sizing components 5 and the supporting components 2, and the bottom plate 108 is provided with a lower oil hole 109; the lubricating oil falls from the bend onto the bottom plate 108, and then falls from the lower oil hole 109 into the oil receiving box 10 below for recovery.

[0039] In the process of the bent pipe moving from between the pre-straightening rollers 301 to the guide block 4, since the part of the bent pipe between the pre-straightening rollers 301 and the guide block 4 is in a suspended state, the weight of the suspended section of the bent pipe itself will cause it to sink, causing the bent pipe to tilt through the guide hole, resulting in wear on the surface of the bent pipe, and the bent pipe cannot maintain a horizontal and straight state to enter the reducing hole, affecting the reducing effect.

[0040] In order to solve the above technical problems, in this embodiment, Fig. 9As shown, the curved pipe section located in the guide hole is supported by setting a support component 6, the support component 6 includes a movable block 601 and a positioning block 602, the movable block 601 and the positioning block 602 are respectively evenly arranged along the circumference of the guide hole, an active rotating rod 604 is rotatably arranged between the movable blocks 601, a passive rotating rod 603 is rotatably arranged between the positioning blocks 602, and a roller 605 is rotatably connected between the passive rotating rod 603 and the active rotating rod 604; a guide hole is set on the guide block 4, the support component 6 is installed in the guide hole, a micro cylinder 606 is connected to any movable block 601 and the movable block 601 opposite to it along the radial direction of the guide hole, the micro cylinder 606 is installed on the edge of the guide hole through a right-angle plate 607, and the movable block 601 and the positioning block 602 are respectively evenly arranged along the radial direction of the guide hole.

[0041] When in use, by controlling the extension of the output end of the micro cylinder 606, the movable block 601 is driven to move toward the positioning block 602, and the active rotating rod 604 is rotated toward the central axis of the guide hole, driving the passive rotating rod 603 to rotate synchronously, thereby driving the roller 605 to synchronously approach the central axis of the guide hole. The roller 605 forms a circle with the central axis of the guide hole as the center, and is close to the outer surface of the bent pipe, which supports the bent pipe and ensures that the part of the bent pipe in the guide hole remains horizontal, preventing wear on the surface of the bent pipe. At the same time, it can maintain a horizontal and straight state to enter the reducing hole to ensure the reduction effect.

[0042] The output of the micro cylinder 606 , ie, the moving distance of the movable block 601 , is calculated based on the diameter of the curved pipe converted from the compression amount of the buffer spring 703 . Specifically: the moving distance of the movable block 601 is consistent with the extension and contraction amount of the output end of the micro cylinder 606, the output of the micro cylinder 606 is set to A1, the initial distance between the movable block 601 and the positioning block 602 is a fixed value, set to A, when the movable block 601 moves, the distance between the movable block 601 and the positioning block 602 is A-A1, set to A2; the length of the passive rotating rod 603 or the active rotating rod 604 is a fixed value, set to C; the height of the movement of the roller 605 is the radius of the guide hole minus the radius of the curved pipe, set to B; the roller 605 and the positioning block 602 and the vertical point of the roller 605 perpendicular to the guide hole form a right triangle, that is, 1 / 2A2, B and C are the right angle side, right angle side and adjacent side respectively. According to the side length formula of the right triangle, the value of the output A1 of the micro cylinder 606 can be obtained.

[0043] By setting the positioning block 602, the movable block 601 and the roller 605, the active rotating rod 604 is driven to rotate by the movement of the movable block 601, and the active rotating rod 604 drives the passive rotating rod 603 to rotate synchronously toward the central axis of the guide block 4, thereby driving the roller 605 to close to the outer surface of the bent pipe to support the bent pipe, avoid wear caused by the bent pipe tilting through the guide block 4, and ensure that the bent pipe enters the reducing hole in a horizontal straight line state for reduction.

[0044] The working principle of the present invention is as follows: first, fix the position of the bent pipe, measure the diameter of the bent pipe, pass the bent pipe through the round through hole 209, and then pass it between the fixed roller 202 and the movable roller 201. The movable roller 201 moves adaptively according to the diameter of the bent pipe. When the movable roller 201 moves, it drives the movable ring 701 to move, thereby compressing the buffer spring 703. The elastic force of the buffer spring 703 itself drives the movable roller 201 to reversely press the bent pipe, so that the bent pipe maintains an angle parallel to the pre-straightening component 3 and enters the pre-straightening component 3. The diameter of the current bent pipe is converted according to the compression deformation of the buffer spring 703.

[0045] Secondly, the bent pipe is pre-straightened. According to the diameter of the bent pipe calculated according to the deformation of the buffer spring 703, the output end of the telescopic cylinder 303 is controlled to extend, so as to drive the right movable plate 309 to move, thereby driving the pre-straightening roller 301 on the right movable plate 309 to approach the pre-straightening roller 301 on the left movable plate 302, until the two rows of pre-straightening rollers 301 clamp the bent pipe, and the pressure on the current bent pipe can be checked by adjusting the pressure indicator on the hand wheel 304. If the pressure needs to be adjusted, the hand wheel 304 can be turned to drive the screw rod 306 to rotate, and the screw rod 306 drives the active translation block 305 located under the left movable plate 302 to move along the screw rod 306, so as to adjust the pressure on the bent pipe.

[0046] Then, the horizontality of the bent pipe is corrected, and the output of the micro cylinder 606 is converted according to the diameter of the bent pipe converted from the compression amount of the buffer spring 703. Then, according to the output, the output end of the micro cylinder 606 is controlled to extend, driving the movable block 601 to move toward the direction of the positioning block 602, and the active rotating rod 604 rotates toward the central axis of the guide hole, driving the passive rotating rod 603 to rotate synchronously, thereby driving the roller 605 to synchronously approach the central axis of the guide hole. The roller 605 forms a circle with the central axis of the guide hole as the center, and is close to the outer surface of the bent pipe, supporting the bent pipe, and ensuring that the bent pipe can maintain a horizontal and straight state to enter the reducing hole for diameter reduction.

[0047] Finally, the diameter of the bent pipe is reduced. The bent pipe is slowly pulled by an external traction machine, and the oil supply box 506 is started. The lubricating oil is output from the oil outlet pipe 507 and poured on the surface of the bent pipe, thereby lubricating the bent pipe. After the bent pipe passes through the guide block 4, the floating core head is placed in the bent pipe, and then passes through the reducing hole. After the floating core head and the cylindrical hole in the reducing hole cooperate, the reduction of the bent pipe is completed.

[0048] Based on the technical solution of the above-mentioned embodiment 1, the reduction of the diameter of the bent pipe can make the wall thickness of the bent pipe uniform, and straighten and sizing the bent pipe. When the bent pipe is in a cylindrical hole, it is in a lined pulling state with the help of a floating core head, and when the bent pipe is in a tapered hole, it is in an empty pulling state. In the empty pulling state, if the wall of the bent pipe is uneven and the weaker position of the wall is weak, when the diameter reduction exceeds a certain value, the weaker wall position will be concave, causing a concave defect, and the defective position cannot be well identified after the diameter reduction; in addition, when the bent pipe is reduced in diameter, the production debris on the surface of the bent pipe will be stuck at the junction of the tapered hole and the cylindrical hole, scratching the surface of the bent pipe; at the same time, the lubricating oil is directly poured on the surface of the bent pipe, and the lubricating oil cannot be evenly distributed on the surface of the bent pipe; and then embodiment 2 is proposed to solve the above-mentioned technical problems. Embodiment 2

[0049] like Figure 10-11 The above technical problems are solved by setting a cleaning component 8. A cleaning component 8 is set on the sizing component 5. The cleaning component 8 includes a cleaning plate 801. A rotating motor 802 is set on one side of the cleaning plate 801. A rotating plate 803 is hinged at one end of the rotating motor 802. A torsion spring is set at the hinge point between the rotating motor 802 and the rotating plate 803. When the cleaning plate 801 rotates and scrapes along the surface of the curved pipe, the torsion spring can assist the rotating motor 802 to drive the cleaning plate 801 to twist, thereby reducing the friction between the tip of the cleaning plate 801 and the surface of the curved pipe to prevent scratches. A swing arm 804 is rotatably set on the rotating plate 803. An adjusting motor 807 is set at the end of the swing arm 804. The output end of the adjusting motor 807 passes through the swing arm 804 and the rotating plate 803 in sequence. There is a telescopic cylinder 805, and a blocking plate 806 is provided at the output end of the telescopic cylinder 805. The blocking plate 806 is used to control the rotating motor 802 and the rotating plate 803 to be relatively still and not torsion. The end of the swing arm 804 away from the rotating plate 803 is rotatably connected to a U-shaped seat 812, and a swing motor 811 is fixedly provided on one side of the U-shaped seat 812. The output end of the swing motor 811 passes through the U-shaped seat 812 and is fixedly connected to the swing arm 804. One end of the U-shaped seat 812 is fixedly connected to a rotating gear ring 808. There are multiple U-shaped seats 812, and they are evenly arranged on the rotating gear ring 808. The rotating gear ring 808 is rotatably set on the reducing block 501. The rotating gear ring 808 is meshed with a gear 809, and the gear 809 is connected to a driving motor 810.

[0050] According to the size of the elbow diameter, the swing motor 811 is controlled to rotate toward the central axis of the reducing hole. At the same time, the adjustment motor 807 is controlled to rotate at the same angle in the direction away from the reducing block 501 to ensure that the tip of the cleaning plate 801 is parallel to the moving direction of the elbow in the horizontal direction until the tip of the cleaning plate 801 is pressed against the outer surface of the elbow. The swing motor 811 and the adjustment motor 807 are stopped, and the oil supply box 506 is opened. The lubricating oil is poured onto the surface of the elbow through the oil outlet pipe 507. At this time, the drive is started. The motor 810 drives the gear 809 to rotate, the gear 809 drives the rotating gear ring 808 to rotate, the rotating gear ring 808 drives the swing arm 804 to rotate in a circle through the U-shaped seat 812, the swing arm 804 drives the cleaning plate 801 to rotate along the surface of the bent pipe, and the lubricating oil on the surface of the bent pipe is scraped so that the lubricating oil is evenly applied to the surface of the bent pipe. At the same time, the cleaning plate 801 can also scrape off the debris on the surface of the bent pipe to prevent the debris from getting stuck at the junction of the conical hole and the cylindrical hole and causing scratches on the surface of the bent pipe.

[0051] When the cleaning plate 801 rotates along the surface of the curved pipe, the tip of the cleaning plate 801 forms a certain angle with the curved pipe surface, causing the torsion spring to be synchronously twisted at a certain angle. When the torsion amount of all torsion springs is the same, it means that there is no concave defect on the current curved pipe surface; when the torsion amount of any torsion spring changes and differs from the torsion amount of the other torsion springs, it means that there is a concave defect on the current curved pipe surface. Since the concave part is a pit, when the tip of the cleaning plate 801 passes through the concave part, the torsion angle of the cleaning plate 801 will become smaller, thereby reducing the torsion amount of the torsion spring. At this time, the cleaning plate 801 is driven to rotate 90° by controlling the rotating motor 802, so that the tip of the cleaning plate 801 forms a vertical state with the moving direction of the curved pipe, and then the output end of the telescopic cylinder 805 is controlled to extend, driving the blocking plate 806 to descend until it contacts the end face of the rotating motor 802, and the rotating motor 802 is limited to limit its torsion, so that the tip of the cleaning plate 801 is pressed against the curved pipe surface. At this time, as the rotating gear ring 808 rotates, the swing arm 804 drives the cleaning plate 801 to rotate along the surface of the bent pipe, and the tip of the cleaning plate 801 scratches the surface of the bent pipe. After the rotating gear ring 808 rotates a circle, a spiral scratch is formed on the surface of the bent pipe, and then the limit of the rotating motor 802 is released, and the cleaning plate 801 is driven to rotate back to the initial position, thereby completing the marking of the concave defect. After the diameter is reduced, the scratch still exists, so that after the subsequent bending pipe is cut into sections, the staff can screen out the bent pipe with concave defects in this section.

[0052] By setting the cleaning plate 801, multiple functions can be realized under different conditions. When the cleaning plate 801 is parallel to the moving direction of the bent pipe, as the cleaning plate 801 rotates in a circle, the cleaning plate 801 scrapes the lubricating oil on the surface of the bent pipe to ensure that the lubricating oil is evenly distributed on the surface of the bent pipe. At the same time, the debris on the surface of the bent pipe can be scraped off to prevent the debris from being stuck at the junction of the conical hole and the cylindrical hole and causing scratches on the surface of the bent pipe. Embodiment 3

[0053] The invention also discloses a straightening method of a bent pipe straightening device, comprising the following steps: Step 1: Positioning the bent pipe. The bent pipe passes through the supporting assembly 2 . The supporting assembly 2 limits and clamps the bent pipe to ensure that the position of the bent pipe is stable when it enters the pre-straightening assembly 3 .

[0054] Step 2: Pre-straightening of the bent pipe. The bent pipe passes between two rows of pre-straightening rollers 301. The telescopic cylinder 303 drives the two rows of pre-straightening rollers 301 to approach each other, clamps and straightens the bent pipe, and the clamping force of the bent pipe is fine-tuned by adjusting the hand wheel 304.

[0055] Step three, pulling and reducing the diameter. The bent pipe is pulled by an external traction machine. After the bent pipe passes through the pre-straightening component 3, the height position of the bent pipe before entering the sizing component 5 is determined by the guide block 4, and then the bent pipe enters the sizing component 5 to complete the diameter reduction.

[0056] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe bending straightening device, characterized in that: The invention comprises a frame assembly (1), a supporting vertical plate (9) is arranged in parallel on the frame assembly (1), a supporting assembly (2) is arranged at one end of the supporting vertical plate (9), a sizing assembly (5) is arranged at the other end of the supporting vertical plate (9), a guide block (4) is arranged on the sizing assembly (5), a supporting assembly (6) is arranged on the guide block (4), an elastic assembly (7) is arranged on the supporting assembly (2), an oil receiving box (10) is arranged on the frame assembly (1), a pre-straightening assembly (3) is arranged on the supporting vertical plate (9), and a cleaning assembly (8) is arranged on the sizing assembly (5); The elastic component (7) comprises a moving ring (701), one side of the moving ring (701) is connected to a moving column (702), a buffer spring (703) is arranged on the outside of the moving column (702), and one end of the moving column (702) away from the moving ring (701) is slidably connected to a support block (704); The support assembly (6) comprises a movable block (601) and a positioning block (602); an active rotating rod (604) is rotatably arranged between the movable blocks (601); a passive rotating rod (603) is rotatably arranged between the positioning blocks (602); and a roller (605) is rotatably connected between the passive rotating rod (603) and the active rotating rod (604).

2. The pipe straightening device according to claim 1, characterized in that: The cleaning assembly (8) comprises a cleaning plate (801), a rotating motor (802) being arranged on one side of the cleaning plate (801), a rotating plate (803) being hingedly connected to one end of the rotating motor (802), a swing arm (804) being rotatably arranged on the rotating plate (803), an adjusting motor (807) being arranged at the end of the swing arm (804), an output end of the adjusting motor (807) passing through the swing arm (804) and the rotating plate (803) in sequence and being connected to a telescopic cylinder (805), and a blocking plate (806) being arranged at the output end of the telescopic cylinder (805).

3. The pipe straightening device according to claim 2, characterized in that: One end of the swing arm (804) away from the rotating plate (803) is rotatably connected to a U-shaped seat (812), a swing motor (811) is fixedly provided on one side of the U-shaped seat (812), one end of the U-shaped seat (812) is fixedly connected to a rotating gear ring (808), the rotating gear ring (808) is meshingly connected to a gear (809), and the gear (809) is connected to a driving motor (810).

4. The pipe straightening device according to claim 1, characterized in that: The guide block (4) is provided with a guide hole, the support assembly (6) is installed in the guide hole, a micro cylinder (606) is connected to any one of the movable blocks (601) and the movable block (601) opposite thereto in the radial direction, the micro cylinder (606) is installed on the edge of the guide hole through a right-angle plate (607), and the movable block (601) and the positioning block (602) are evenly arranged in the radial direction of the guide hole; one end of the buffer spring (703) is fixedly connected to the movable ring (701), and the other end is fixedly connected to the movable column (702).

5. The pipe bending straightening device according to claim 1, characterized in that: The supporting assembly (2) comprises a fixed roller (202) and a movable roller (201), wherein a rotating shaft (212) is arranged on the central axis of the fixed roller (202) and the movable roller (201), and support vertical plates (203) are arranged on both sides of the fixed roller (202) and the movable roller (201), and the support vertical plates (203) are provided with a transverse through hole (210) and a vertical through hole (211), and the two ends of the rotating shaft (212) on the fixed roller (202) are arranged in the vertical through hole (211), and the rotating shaft (212) on the movable roller (201) is arranged in the transverse through hole (210). 10), a square plate (204) is provided at the end of the vertical through hole (211), a support screw (205) is rotatably provided on the central axis of the square plate (204), the ends of the support screw (205) are provided at the bottom of the rotating shafts (212) at both ends of the fixed roller (202), a support box (206) is provided between the support vertical plates (203), a support plate (207) is fixedly provided on the support box (206), a support cylinder (208) is fixedly provided on the support plate (207), and a round through hole (209) is provided on the support cylinder (208).

6. The pipe bending straightening device according to claim 1, characterized in that: The sizing assembly (5) comprises a reducing block (501), with limiting vertical plates (502) being arranged at both ends of the reducing block (501), with fixed horizontal plates (503) being arranged on both sides of the limiting vertical plates (502), with the fixed horizontal plates (503) being mounted on the supporting vertical plates (9) via vertical screws (504), with mounting blocks (505) being arranged on the supporting vertical plates (9), with oil supply boxes (506) being arranged between the mounting blocks (505), and with an oil outlet pipe (507) being arranged on the oil supply box (506).

7. The pipe bending straightening device according to claim 1, characterized in that: The pre-straightening assembly (3) comprises pre-straightening rollers (301), the pre-straightening rollers (301) are located between the supporting uprights (9), and are arranged in two rows, the two rows of pre-straightening rollers (301) are arranged at intervals, a left movable plate (302) and a right movable plate (309) are respectively arranged at the bottom of the two rows of pre-straightening rollers (301), a telescopic cylinder (303) is arranged on the supporting upright (9) close to the right movable plate (309), and the telescopic cylinder (303) The output end of the left movable plate (302) and the right movable plate (309) are connected to an active translation block (305), respectively arranged at the bottom of the left movable plate (302) and the right movable plate (309), and an adjusting hand wheel (304) is arranged on the supporting upright plate (9) close to the left movable plate (302). A screw rod (306) is fixedly connected to the adjusting hand wheel (304), and the screw rod (306) is rotatably arranged on the supporting upright plate (9).

8. The pipe bending straightening device according to claim 7, characterized in that: The active translation block (305) is rotatably connected to the screw rod (306); a thread is provided at one end of the screw rod (306) close to the adjusting hand wheel (304); a thread matching the screw rod (306) is provided in the active translation block (305) located below the left movable plate (302); passive translation blocks (308) are provided on both sides of the active translation block (305); auxiliary rods (307) are provided on both sides of the screw rod (306); and the passive translation block (308) is slidably provided on the auxiliary rods (307).

9. The pipe bending straightening device according to claim 1, characterized in that: The frame assembly (1) comprises a support frame (101), a mounting seat (102) is fixedly arranged on the support frame (101), a transverse extension plate (104) and a longitudinal extension plate (103) are arranged on the mounting seat (102), vertical support plates (105) are respectively arranged on the transverse extension plate (104) and the longitudinal extension plate (103), a transverse screw rod (106) is rotatably connected to the vertical support plate (105), the support vertical plate (9) is arranged parallel to the support frame (101), the end of the transverse screw rod (106) is screwed into the support vertical plate (9), a partition plate (107) and a bottom plate (108) are fixedly arranged between the support vertical plates (9), and a lower oil hole (109) is opened on the bottom plate (108).

10. A straightening method for a bent pipe straightening device according to claim 7, characterized in that: The following steps are involved: Step 1: Positioning the bent pipe. The bent pipe passes through the supporting assembly (2). The supporting assembly (2) limits and clamps the bent pipe to ensure that the position of the bent pipe is stable when it enters the pre-straightening assembly (3). Step 2: Pre-straightening of the bent pipe. The bent pipe passes between two rows of pre-straightening rollers (301). The two rows of pre-straightening rollers (301) are driven to approach each other by the telescopic cylinder (303) to clamp and straighten the bent pipe. The clamping force of the bent pipe is fine-tuned by adjusting the hand wheel (304). Step 3: Pulling and reducing the diameter. The bent pipe is pulled by an external traction machine. After the bent pipe passes through the pre-straightening component (3), the height position of the bent pipe before entering the sizing component (5) is determined by the guide block (4), and then the bent pipe enters the sizing component (5) to complete the diameter reduction.

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