Flame cutting machine for elbow machining

Abstract

The invention relates to the technical field of pipeline cutting machining, and provides a flame cutting machine for elbow machining, which is used for cutting a pipeline into pipe sections for manufacturing elbows and comprises an annular guide rail, the annular guide rail is arranged on the pipeline in a sleeving manner, a moving seat is arranged on the peripheral wall of the annular guide rail in a sliding manner, and a flame cutting gun is mounted on the moving seat; the flame cutting gun extends out of one side of the annular guide rail and extends to a to-be-cut part of the pipeline; the variable-diameter cushion blocks are detachably arranged on the inner circumferential wall of the annular guide rail, the end faces, away from the annular guide rail, of the variable-diameter cushion blocks abut against the pipeline, the variable-diameter cushion blocks can be selected, grooves are formed in the fixed blocks, the opening directions of the grooves face the axis of the annular guide rail, the sliding blocks are arranged in the grooves in a sliding mode, and the sliding blocks can slide out of the grooves. Therefore, the abutting surface abuts against the outer wall of the pipeline. By means of the technical scheme, the technical problem that in the prior art, a traditional flame cutting machine cannot be automatically suitable for pipelines with different pipe diameters is solved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of pipe cutting and processing, and specifically, to a flame cutting machine for elbow processing. Background Art

[0002] A flame cutting machine is a device that uses a gas flame (such as oxygen-acetylene or oxygen-propane) to preheat the metal to be cut to its ignition point, then releases a high-pressure oxygen stream to cause the metal to oxidize violently and release heat, and uses the blowing force of the oxygen stream to blow off the oxidized slag, thereby realizing the cutting of metal materials. In the field of pipe processing, flame cutting machines are often used to cut pipe segments to make various pipe fittings.

[0003] Traditional flame cutting machines generally consist of a fixed frame, a linear guide rail installed on the frame, a cutting trolley moving along the linear guide rail, and a flame cutting torch arranged on the trolley. When cutting a pipe to make an elbow, it is usually necessary to manually fix the pipe on the workbench, and then operate the cutting trolley to move along the predetermined cutting line of the pipe to complete the cutting operation. However, this traditional flame cutting machine has many disadvantages: firstly, for pipes with different diameters, there is a lack of suitable fixing devices, making it difficult to ensure the stability of the pipe during cutting, resulting in low cutting accuracy; secondly, the cutting process relies on manual operation, with low automation, not only low efficiency, but also large manual operation errors, affecting the quality of elbow processing; thirdly, the traditional fixing method has poor versatility, and the fixing structure needs to be frequently replaced or adjusted for pipes with different diameters, increasing the complexity of operation and labor intensity. Summary of the Invention

[0004] To overcome the above defects, the present invention provides a flame cutting machine for elbow processing, which solves the technical problem that traditional flame cutting machines in the prior art cannot automatically adapt to different pipe diameters.

[0005] According to one aspect, at least one embodiment of the present invention provides a flame cutting machine for elbow processing, which is used to cut a pipe into a pipe segment for making an elbow, and includes: An annular guide rail, which is used to sleeved on the pipe, a moving seat is slidably arranged on the outer peripheral wall of the annular guide rail, a flame cutting torch is installed on the moving seat, and the flame cutting torch extends to one side of the annular guide rail to correspond to the part of the pipe to be cut; There are several variable-diameter pads, and several variable-diameter pads are detachably arranged on the inner peripheral wall of the annular guide rail. One end face of the variable-diameter pad away from the annular guide rail abuts against the pipe. Optionally, the fixing block is provided with a groove, the opening of the groove faces the axis of the annular guide rail, the sliding block is slidably arranged in the groove along the radial direction of the annular guide rail, and the sliding block can slide out of the groove so that the abutting surface abuts against the outer wall of the pipe.

[0006] Optionally, several of the sliding blocks enclose a pipe-passing space at the axis of the annular guide rail, and the maximum diameter of the pipe-passing space is the linear distance from the end face of the fixed block away from the annular guide rail to the axis.

[0007] Optionally, a tension spring is arranged between the inner wall of the fixed block and the outer wall of the sliding block, and the tension spring is used to elastically pull the sliding block back into the groove; a through groove communicating with the groove is formed on the end face of the fixed block, and the through groove communicates with the groove; A driving mechanism is arranged on the side of the annular guide rail, and the driving mechanism can extend into the through groove and push the sliding block to move toward the axis side of the annular guide rail.

[0008] Optionally, the driving mechanism includes: An annular fixing plate arranged on the side of the annular guide rail; several screw rods penetrate through the annular fixing plate, and the screw rods are rotationally matched with the annular fixing plate. The several screw rods are arranged circumferentially along the annular fixing plate. A top block is sleeved on the screw rod in a threaded manner, and the outer wall of the top block is in sliding contact with the inner wall of the through groove. The top block can enter the through groove under the drive of the screw rod and press the sliding block toward the axis side of the annular guide rail, so that the sliding block presses against the outer peripheral wall of the pipe.

[0009] Optionally, the top block has an inclined pushing surface for pushing the sliding block, and the inclined pushing surface gradually inclines toward the axis side of the annular guide rail from the side close to the fixed block to the side close to the annular fixing plate. A convex block is arranged on the side wall of the sliding block close to the fixed block, and the inclined pushing surface is in sliding contact with the convex block.

[0010] Optionally, a first gear is fixedly sleeved on the screw rod, and a first annular rack is slidably sleeved on the annular fixing plate. The first annular rack is concentrically arranged with the annular fixing plate, and the first annular rack can rotate circumferentially relative to the annular fixing plate to drive the first gear to rotate synchronously, so that the several screw rods rotate synchronously.

[0011] Optionally, a receiving groove is formed in the sliding block and is arranged toward the axis of the annular guide rail. A traveling mechanism capable of driving the annular guide rail to move axially along the pipe is arranged in the receiving groove. The traveling mechanism includes: An elastic frame arranged in the receiving groove; A driving roller rotatably arranged on the elastic frame. The driving roller abuts against the outer peripheral wall of the pipe under the action of the elastic frame. After the sliding block moves away from the pipe, the driving roller can expose the opening of the receiving groove, so that the driving roller drives the annular guide rail to move axially along the pipe.

[0012] Optionally, a displacement mechanism for driving the flame cutting torch to move is provided on the moving seat. The displacement mechanism includes: A first linear driver is provided on the moving seat. The first linear driver is used to drive the flame cutting torch to move along the axial direction of the pipeline; A second linear driver is provided on the movable end of the first linear driver, and the main axis of the second linear driver is perpendicular to the first linear driver. The second linear driver is used to drive the flame cutting torch to move along the radial direction of the pipeline.

[0013] Optionally, a second annular rack is provided on the outer peripheral wall of the annular guide rail, and a second gear is provided on the moving seat. The second gear meshes with the second annular rack, and the second gear can move along the second annular rack driven by a motor, so that the moving seat moves along the annular guide rail.

[0014] The beneficial effects of the embodiments of the present invention are: In the present invention, before the cutting operation, first sleeved the annular guide rail on the pipeline. According to the pipeline diameter, carefully adjust the position of the sliding block on the fixed block so that the abutting surface of the sliding block tightly abuts against the outer wall of the pipeline, thereby firmly and reliably fixing the annular guide rail on the pipeline. Subsequently, adjust the flame cutting torch to a suitable angle and position, start the cutting torch, and the moving seat slides along the annular guide rail by itself, and the flame cutting torch performs precise cutting operations along the predetermined cutting line of the pipeline.

[0015] In the present invention, the diameter of the annular guide rail is fixed, but by adjusting the protruding distance of the sliding block on the diameter-changing spacer block, the cutting machine can adapt to pipelines with different diameters. Whether it is a thinner pipeline or a large-diameter pipeline, it can ensure the stability of the pipeline during cutting and effectively improve the cutting accuracy; at the same time, compared with the traditional manual fixing method, this structure has strong versatility and does not require frequent replacement or adjustment of the fixing structure, greatly reducing the complexity of operation and labor intensity. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some exemplary embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the exemplary embodiments of the present invention and these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the pipeline and the flame cutting machine in an embodiment of the present invention; Figure 2 In Figure 1 the embodiment of, the structural schematic diagram of the flame cutting machine; Figure 3 In Figure 1 the embodiment of, the structural schematic diagram of the stepped spacer; Figure 4 In Figure 3 the embodiment of, the side view of the stepped spacer; Figure 5 In Figure 4 the cross-sectional view taken along line A-A in; Figure 6 In Figure 4 the cross-sectional view taken along line B-B in; Figure 7 In Figure 3 the embodiment of, the front view of the stepped spacer; Figure 8 In Figure 7 the cross-sectional view taken along line C-C in; Figure 9 In Figure 8 the enlarged partial view at D in; Figure 10 In Figure 1 the embodiment of, the structural schematic diagram of the annular guide rail; Figure 11 In Figure 1 the embodiment of, the overall structural schematic diagram of the pipeline and the flame cutting machine from another perspective; Figure 12 In Figure 11 the enlarged partial view at E in.

[0018] In the figure: 1, pipeline; 2, annular guide rail; 3, moving seat; 4, flame cutting gun; 5, stepped spacer; 51, fixed block; 510, groove; 511, tension spring; 512, through groove; 52, sliding block; 520, receiving groove; 521, abutting surface; 53, pipe passing space; 6, driving mechanism; 61, annular fixing plate; 62, screw rod; 63, top block; 630, inclined pushing surface; 7, convex block; 81, first annular rack; 82, first gear; 9, traveling mechanism; 91, elastic frame; 92, driving roller; 10, second annular rack; 11, displacement mechanism; 1101, first linear driver; 1102, second linear driver; 12, second gear. Detailed implementation manners The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention.

[0019] For the sake of simplicity of the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, among the parts with the same structure or function in some figures, only one of them is schematically shown, or only one of them is labeled. In this text, "one" not only means "only this one", but also can mean "more than one" situation, and "several" includes "two" and "more than two".

[0020] In this text, it should be noted that unless otherwise clearly specified and defined, the terms "install", "connect", and "join" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0021] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can include the direct contact between the first and second features, and can also include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0022] In the description of this embodiment, the orientation or positional relationship such as "up", "down", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0023] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0024] Such as Figures 1 to 12As shown, it shows a flame cutting machine for elbow processing in an embodiment of the present invention. The flame cutting machine for elbow processing mainly consists of an annular guide rail 2, a moving seat 3, a flame cutting gun 4, and a variable-diameter spacer 5. The annular guide rail 2 is circular, and its inner diameter is larger than the outer diameter of the conventional pipe 1, and it can be sleeved on the pipe 1. When the annular guide rail 2 is sleeved on the pipe 1, the annular guide rail 2 is concentric with the pipe 1. An annular slide rail is processed on the outer peripheral wall of the annular guide rail 2. Specifically, the slide rail is located at both ends of the annular guide rail 2. Wheels are provided on the moving seat 3, and clamping grooves are opened on the outer wall circumference of the wheels. The wheel housing is connected with the two sides of the annular guide rail 2 in a limited sliding manner through the clamping grooves. The flame cutting gun 4 is fixedly installed on the moving seat 3, and the nozzle of the flame cutting gun 4 extends out of one side of the annular guide rail 2. In this way, the flame cutting gun 4 can quickly and accurately aim at the part to be cut of the pipe 1 according to the cutting requirement.

[0025] The number of variable-diameter spacers 5 is 4 - 6, and they are evenly distributed in a circumferential manner on the inner peripheral wall of the annular guide rail 2. Each variable-diameter spacer 5 consists of a fixed block 51 and a sliding block 52. The fixed block 51 is detachably fixed on the inner peripheral wall of the annular guide rail 2 through bolts. The sliding block 52 is slidably arranged on the fixed block 51 along the radial direction of the annular guide rail 2 through a dovetail groove structure. One end face of the sliding block 52 away from the fixed block 51 is an abutting surface 521. It should be noted that in order to significantly increase the pressing and fixing effect between the sliding block 52 and the outer wall of the pipe 1, a rubber pad with high elasticity and anti-slip characteristics can be installed on the abutting surface 521, or fine anti-slip grooves can be directly opened on the abutting surface 521. By increasing the friction force, the fixing effect can be greatly improved. The rubber pad is made of a special rubber material with high temperature resistance and wear resistance, and a micro-convex structure can also be set on its surface to further enhance the friction force; the anti-slip grooves adopt an interleaved grid layout, which can effectively prevent sliding caused by vibration during the cutting process.

[0026] For example, as Figure 1 shown, specifically, before the cutting operation, first sleeve the annular guide rail 2 on the pipe 1. According to the pipe diameter of the pipe 1, carefully adjust the position of the sliding block 52 on the fixed block 51 so that the abutting surface 521 of the sliding block 52 tightly abuts against the outer wall of the pipe 1, thereby firmly and reliably fixing the annular guide rail 2 on the pipe 1. Subsequently, adjust the flame cutting gun 4 to an appropriate angle and position, start the cutting gun, and the moving seat 3 slides along the annular guide rail 2 by itself, and the flame cutting gun 4 performs precise cutting operations along the predetermined cutting line of the pipe 1.

[0027] In the present invention, the diameter of the annular guide rail 2 is fixed. However, by adjusting the protruding distance of the sliding block 52 on the variable-diameter spacer block 5, the cutting machine can be adapted to pipes 1 with different pipe diameters. Whether it is a relatively thin pipe 1 or a large-diameter pipe 1, the stability of the pipe 1 during cutting can be ensured, effectively improving the cutting accuracy. At the same time, compared with the traditional manual fixing method, this structure has strong versatility and does not require frequent replacement or adjustment of the fixing structure, greatly reducing the complexity of operation and labor intensity.

[0028] In some examples, a groove 510 is formed on one side of the fixing block 51 facing the axis of the annular guide rail 2. The depth of the groove 510 is greater than or equal to the thickness of the sliding block 52, which can ensure that the sliding block 52 can slide smoothly in the groove 510. The sliding block 52 can completely slide out of the groove 510. When it slides out, the abutting surface 521 can closely fit the outer wall of the pipe 1. A high-precision guide rail and lubrication system are arranged inside the groove 510. The guide rail is made of high-strength alloy steel and its surface is subjected to precision grinding and hardening treatment to reduce the sliding friction resistance. The lubrication system uses an automatic oil supply device, which can provide an appropriate amount of lubricant in real time according to the movement state of the sliding block 52 to ensure a smooth sliding process.

[0029] For example, as Figure 2 shown, specifically, when the annular guide rail 2 is sleeved on the pipe 1, the sliding block 52 slides out of the groove 510 under the action of the driving mechanism 6 until the abutting surface 521 contacts the outer wall of the pipe 1. It should be noted that since the driving mechanism 6 drives all the sliding blocks 52 to extend synchronously, there is no need to adjust the coaxiality of the annular guide rail 2 and the pipe 1 anymore. In this way, the installation time can be greatly reduced and the installation steps can be simplified, making the applicability of this device stronger. At this time, the fixing of the annular guide rail 2 is completed. During disassembly, the sliding block 52 moves in the reverse direction and completely slides back into the groove 510, and the annular guide rail 2 can be easily removed from the pipe 1. The convenience of fixing and disassembling the annular guide rail 2 is improved, and at the same time, the fixing effect on the pipe 1 is significantly enhanced.

[0030] In some examples, a plurality of sliding blocks 52 enclose a pipe-passing space 53 at the axis of the annular guide rail 2, and the pipe-passing space 53 is circular. The straight-line distance from the end face of the fixing block 51 away from the annular guide rail 2 to the axis determines the maximum diameter of the pipe-passing space 53. It is ensured that when the sliding block 52 completely retracts into the groove 510, the pipe-passing space 53 can accommodate pipes 1 with different pipe diameters to pass through; when the sliding block 52 extends and abuts against the pipe 1, it can provide a sufficient supporting area to ensure the stable fixing of the annular guide rail 2. The diameter of the pipe-passing space 53 can be continuously adjusted within a certain range to adapt to pipes 1 of different specifications, and its adjustment accuracy can reach ±0.1 mm, which can meet the processing requirements of most industrial pipes 1.

[0031] For example, asFigures 2 to 5 As shown, when it is necessary to cut pipes 1 with different diameters, the annular guide rail 2 is sleeved on the pipe 1. The sliding block 52 will automatically adjust its protruding length according to the diameter of the pipe 1 to form a pipe-passing space 53 of appropriate size, so that the annular guide rail 2 is firmly fixed on the pipe 1. After cutting, the sliding block 52 retracts, and the pipe-passing space 53 expands, facilitating the removal of the annular guide rail 2 from the pipe 1. This device can better adapt to pipes 1 with different diameters, improving the versatility and applicability of the cutting machine, while ensuring the reliability of the fixation of the pipe 1.

[0032] In some examples, a tension spring 511 is installed between the inner wall of the fixed block 51 and the outer wall of the sliding block 52. One end of the tension spring 511 is fixed to the inner wall of the fixed block 51, and the other end is fixed to the outer wall of the sliding block 52. The elastic force direction of the tension spring 511 faces towards the inside of the groove 510, and is used to pull the sliding block 52 back into the groove 510. A through groove 512 is opened on the side wall of the fixed block 51. The through groove 512 communicates with the groove 510, and the size of the through groove 512 can ensure that the moving end of the driving mechanism 6 extends smoothly into it. A driving mechanism 6 is arranged inside the annular guide rail 2, and the moving end of the driving mechanism 6 extends into the through groove 512. The tension spring 511 is made of high-strength alloy spring steel, having good elasticity and anti-fatigue performance, which can ensure the smooth and reliable retraction of the sliding block 52, and at the same time will not affect the normal operation of the driving mechanism 6 due to excessive elastic force.

[0033] When the driving mechanism 6 is not started, the sliding block 52 remains in or partially retracts into the groove 510 under the action of the tension spring 511. When it is necessary to fix the annular guide rail 2, start the driving mechanism 6. The driving mechanism 6 overcomes the elastic force of the tension spring 511 and pushes the sliding block 52 to move towards the axial center direction, so that the sliding block 52 protrudes from the groove 510, and the abutting surface 521 is in close contact with the outer wall of the pipe 1, completing the fixation of the annular guide rail 2. After cutting, turn off the driving mechanism 6, and the sliding block 52 retracts into the groove 510 under the action of the tension spring 511, facilitating the disassembly of the annular guide rail 2. The cooperation of the tension spring 511 and the driving mechanism 6 realizes the automatic telescopic control of the sliding block 52, eliminating the need for manual adjustment, improving the automation degree and convenience of operation, while ensuring the efficiency and stability of the fixation and disassembly of the annular guide rail 2.

[0034] In some examples, the driving mechanism 6 includes an annular fixing plate 61, a screw 62 and a top block 63. The annular fixing plate 61 is fixedly arranged inside the annular guide rail 2. The inner diameter of the annular fixing plate 61 is larger than the maximum diameter of the pipe passing space 53 to avoid interference with the pipe 1. A number of bearing seats are evenly distributed on the annular fixing plate 61. A bearing is installed in each bearing seat. The screw 62 is rotatably arranged on the annular fixing plate 61 through the bearing. A number of screws 62 are arranged in a circumferential arrangement around the axis on the annular fixing plate 61. One end of each screw 62 is connected to the top block 63. The outer wall of the top block 63 is in sliding contact with the inner wall of the through groove 512. In this way, the influence of the rotation of the screw 62 can be offset, so that the top block 63 moves linearly along the through groove 512, ensuring that the top block 63 can smoothly enter the through groove 512 under the drive of the screw 62 and squeeze the sliding block 52 in the axial direction. The screw 62 is designed with trapezoidal threads, which has high transmission efficiency and self-locking performance and can accurately control the moving distance of the top block 63. The bearing seat adopts a sealing structure, which can effectively prevent dust and impurities from entering the bearing and extend the service life of the bearing.

[0035] For example, as Figure 8 and Figure 9 shown, when it is necessary to fix the annular guide rail 2, rotate the screw 62. The screw 62 drives the top block 63 to move in the axial direction through screw transmission. The top block 63 enters the through groove 512 and squeezes the sliding block 52, so that the sliding block 52 moves in the axial direction against the elastic force of the tension spring 511 until the contact surface 521 is in close contact with the outer wall of the pipe 1, completing the fixation of the annular guide rail 2. After cutting is completed, the screw 62 rotates in the reverse direction and the top block 63 retracts. The sliding block 52 retracts into the groove 510 under the action of the tension spring 511. Through the transmission structure of the screw 62 - top block 63, precise pushing of the sliding block 52 is achieved, and the extended length of the sliding block 52 can be accurately adjusted according to the pipe 1 with different pipe diameters, ensuring the fixing effect of the annular guide rail 2 on pipes 1 with different pipe diameters. At the same time, this structure has stable and reliable transmission, and is easy to operate and maintain.

[0036] In some examples, an inclined pushing surface 630 is machined at the bottom of the top block 63. The inclined pushing surface 630 gradually slopes downward along the direction from the fixed block 51 to the annular fixing plate 61. The inclined pushing surface 630 can be in close contact with and smoothly slide on the convex block 7 on the sliding block 52. A convex block 7 is fixedly arranged on the outer surface of the sliding block 52 close to the fixed block 51. The shape of the convex block 7 is adapted to the inclined pushing surface 630 and can smoothly slide on the inclined pushing surface 630. The contact surfaces of the inclined pushing surface 630 and the convex block 7 are both subjected to precision grinding and polishing treatment and coated with an antifriction and wear-resistant coating to reduce the frictional resistance and wear during the sliding process, improve the transmission efficiency and service life. The coating material uses a nano-composite ceramic material, which has excellent hardness and wear resistance and can effectively extend the service life of the inclined pushing surface 630 and the convex block 7.

[0037] For example, as Figure 8 shown, when the rotating screw 62 drives the top block 63 to move towards the axial center direction, the inclined pushing surface 630 at the bottom of the top block 63 contacts the convex block 7 on the sliding block 52. As the top block 63 continues to move, the inclined pushing surface 630 pushes the convex block 7, causing the sliding block 52 to move towards the axial center direction against the elastic force of the tension spring 511, realizing the extension of the sliding block 52. When the screw 62 rotates in the reverse direction, the top block 63 retracts. Under the action of the tension spring 511, the convex block 7 of the sliding block 52 slides back along the inclined pushing surface 630 and retracts into the groove 510. The cooperation between the inclined pushing surface 630 and the convex block 7 converts the linear movement of the top block 63 into the radial movement of the sliding block 52, making the extension and retraction process of the sliding block 52 smoother and more stable, reducing friction and wear, improving the transmission efficiency and service life of the driving mechanism 6, and at the same time ensuring the stability of the fixing and disassembly of the annular guide rail 2.

[0038] In some examples, a first gear 82 is fixedly sleeved on each screw 62, and the first gear 82 rotates synchronously with the screw 62. An annular slide rail is provided on the annular fixing plate 61. The first annular rack 81 is matched with the slide rail through a slider and can slide along the annular fixing plate 61, and the first annular rack 81 is concentrically arranged with the annular fixing plate 61. The tooth shape of the first annular rack 81 is adapted to the first gear 82 and can be meshed with a plurality of first gears 82 simultaneously. Both the first gear 82 and the first annular rack 81 are made of high-strength alloy steel, and the tooth surfaces are subjected to carburizing and quenching treatment, having high hardness and wear resistance; the slider is made of self-lubricating material and can work normally without oil lubrication, reducing the maintenance workload. It can be understood that if the variable-diameter pads 5 are installed on both the left and right sides of the annular fixing plate 61, the bidirectional screw 62 needs to be used for the screw 62.

[0039] For example, as Figure 8 and Figure 9 shown, when it is necessary to synchronously rotate a plurality of screws 62, push the first annular rack 81 to slide along the annular fixing plate 61. The first annular rack 81 meshes with the first gear 82, driving a plurality of first gears 82 to rotate synchronously, and further causing a plurality of screws 62 to rotate synchronously, realizing the synchronous movement of a plurality of top blocks 63 towards the axial center direction, squeezing the sliding block 52, ensuring the coaxiality of the annular guide rail 2 and the pipeline 1, and quickly and stably fixing the annular guide rail 2 on the pipeline 1. After cutting is completed, push the first annular rack 81 in the reverse direction, the screw 62 rotates in the reverse direction, and the sliding block 52 retracts. The first annular rack 81 and the first gear 82 realize the synchronous rotation of a plurality of screws 62, ensuring the synchronous extension and retraction of a plurality of sliding blocks 52, improving the efficiency and consistency of the fixing and disassembly of the annular guide rail 2, avoiding problems such as unstable fixing caused by the asynchrony of a single sliding block 52, simplifying the operation process, and reducing the labor intensity.

[0040] In some examples, a receiving groove 520 is formed in the sliding block 52. The opening direction of the receiving groove 520 faces the axis. A traveling mechanism 9 capable of driving the annular guide rail 2 to move axially along the pipeline 1 is installed in the receiving groove 520. The traveling mechanism 9 includes: an elastic frame 91 and a driving roller 92. The driving roller 92 abuts against the outer wall of the pipeline 1 under the action of the elastic frame. After the sliding block 52 moves away from the pipeline 1, the driving roller 92 can expose the opening of the receiving groove 520 so that the driving roller 92 moves along the axis of the pipeline 1. The elastic frame 91 is made of high-strength spring steel plate, has good elasticity and toughness, and can effectively buffer the vibration generated during the cutting process while ensuring that the driving roller 92 is in close contact with the outer wall of the pipeline 1; a layer of rubber material with a high friction coefficient is coated on the surface of the driving roller 92 to increase the friction force between the driving roller 92 and the outer wall of the pipeline 1 and ensure that the traveling mechanism 9 can reliably drive the annular guide rail 2 to move.

[0041] Specifically, the elastic frame 91 includes a main spring assembly, a damping buffer system, an adaptive adjustment arm, and an anti-loosening locking mechanism. The main spring assembly uses a high-strength alloy steel helical spring group, and the calibrated elastic coefficient ensures a stable contact pressure on the surfaces of pipelines 1 with different diameters; the damping buffer system consists of a hydraulic damper and a rubber buffer block working together. The damping coefficient can efficiently absorb high-frequency vibrations while maintaining a sensitive response; the adaptive adjustment arm realizes multi-dimensional adjustment through a telescopic link structure and a ball joint. The surface scale markings simplify the quick positioning of the driving roller 92; the anti-loosening locking mechanism uses a wedge-shaped locking block and a fastening bolt combination. The high-strength aluminum alloy material is anodized to ensure a firm and reliable connection in a long-term vibrating environment. During operation, the elastic frame 91 keeps the driving roller 92 in close fit with the surface of the pipeline 1 through the pre-tightening spring force to form a stable support base; during the cutting process, the hydraulic damper converts the vibration energy into heat and dissipates it, and the rubber buffer block absorbs the remaining micro-vibrations, double-guaranteeing the stable operation of the driving roller 92; in the face of unevenness on the surface of the pipeline 1 or changes in the pipe diameter, the main spring assembly automatically adjusts the position of the driving roller 92 to ensure that the contact state is not affected; the coincidence of the elastic center and the force center effectively cancels out the moment generated by the cutting reaction force, significantly improving the stability and accuracy of the cutting process.

[0042] For example, such as Figure 5As shown, when the annular guide rail 2 is fixed on the pipeline 1 for cutting operations, the driving roller 92 abuts against the outer wall of the pipeline 1 under the action of the elastic frame, but does not affect the normal cutting of the flame cutting gun 4. When the cutting is completed and the annular guide rail 2 needs to be moved axially along the pipeline 1, the sliding block 52 retracts under the action of the driving mechanism 6, and the driving roller 92 exposes the opening of the receiving groove 520. At this time, the driving motor of the driving roller 92 is started, and the driving roller 92 rolls axially along the pipeline 1 under the action of friction, driving the annular guide rail 2 to move axially along the pipeline 1 to the next cutting position. The traveling mechanism 9 enables the annular guide rail 2 to automatically move axially along the pipeline 1, eliminating the need for manual handling and reinstallation, improving the automation level and efficiency of the cutting operation, reducing the labor intensity. At the same time, the elastic frame 91 ensures good contact between the driving roller 92 and the outer wall of the pipeline 1, ensuring the stability and reliability of the movement.

[0043] In some examples, a displacement mechanism 11 is provided on the moving seat 3. The displacement mechanism 11 includes a first linear driver 1101 and a second linear driver 1102. The first linear driver 1101 can be an electric push rod, a cylinder, a hydraulic cylinder, etc., and is fixedly installed on the moving seat 3. Its movable end is arranged along the axial direction of the pipeline 1 and is used to drive the flame cutting gun 4 to move axially along the pipeline 1. The second linear driver 1102 can also be an electric push rod, a cylinder, a hydraulic cylinder, etc., and is fixedly installed on the movable end of the first linear driver 1101. Its movable end is arranged along the radial direction of the pipeline 1 and is used to drive the flame cutting gun 4 to move radially along the pipeline 1.

[0044] It should be noted that an adjustable flame focusing device is provided at the nozzle of the flame cutting gun 4. The device includes a group of rotatable guide vanes and a telescopic nozzle sleeve. The guide vanes are driven by a micro motor and can automatically adjust the diffusion angle of the flame according to the thickness and material of the cutting material, making the flame energy more concentrated, improving the cutting efficiency and quality. The nozzle sleeve can be finely adjusted in the axial direction to control the distance between the flame and the workpiece, ensuring the stability of the cutting process. The flame focusing device is also equipped with a temperature sensor and a control system, which can monitor the flame temperature in real time and perform automatic adjustment to avoid affecting the cutting quality due to too high or too low temperature.

[0045] For example, as Figure 10 shown, before the cutting operation, according to the cutting requirements of the pipeline 1, first adjust the position of the flame cutting gun 4 in the axial direction of the pipeline 1 through the first linear driver 1101 to align it with the cutting starting point; then adjust the position of the flame cutting gun 4 in the radial direction of the pipeline 1 through the second linear driver 1102 to determine the cutting depth and angle. During the cutting process, the position of the flame cutting gun 4 can also be adjusted in real time through the first linear driver 1101 and the second linear driver 1102 according to actual needs to ensure the accuracy and quality of the cutting.

[0046] The displacement mechanism 11 enables the flame cutting gun 4 to be precisely moved and adjusted in the axial and radial directions of the pipe 1, meeting different cutting requirements, improving cutting flexibility and precision, being able to adapt to various complex elbow processing requirements, and improving the quality and efficiency of elbow processing.

[0047] Specifically, the first linear drive 1101 and the second linear drive 1102 are both screw motors or electric push rods. The screw motor, with its high-precision transmission characteristics, can achieve small and precise displacement adjustment of the flame cutting gun 4 in the axial and radial directions, meeting the processing scenarios with extremely high cutting accuracy requirements; the electric push rod, with its advantages of simple structure, large thrust and fast response speed, plays an important role in some situations where there is a demand for cutting efficiency and large stroke adjustment. In practical applications, the two can be flexibly selected and configured according to the specific elbow processing process requirements.

[0048] In some examples, a second annular rack 10 is fixedly provided on the outer peripheral wall of the annular guide rail 2, and the second annular rack 10 is arranged along the circumferential direction of the annular guide rail 2. A motor is installed on the moving seat 3, and a second gear 12 is fixedly connected to the output shaft of the motor, and the second gear 12 is meshed with the second annular rack 10. The motor, the second gear 12 and the moving seat 3 are connected and supported by components such as bearings and shafts to ensure that the second gear 12 can rotate smoothly.

[0049] For example, Figure 11 and Figure 12 As shown, the motor is started, and the motor drives the second gear 12 to rotate. Since the second gear 12 is meshed with the second annular rack 10, the second gear 12 moves along the second annular rack 10 during the rotation process, thereby driving the moving seat 3 to move along the annular guide rail 2. By controlling the forward and reverse rotation and the rotation speed of the motor, the moving direction and speed of the moving seat 3 can be accurately controlled, so that the flame cutting gun 4 can perform cutting operations along the predetermined cutting line. The transmission structure of the second annular rack 10 and the second gear 12 realizes the automatic movement of the moving seat 3 along the annular guide rail 2, replaces the traditional manual pushing method, and improves the automation and efficiency of the cutting operation. At the same time, the transmission structure has high transmission accuracy, which can ensure that the flame cutting gun 4 moves accurately along the predetermined path, improves the accuracy and stability of the cutting, and ensures the quality of the elbow processing. In addition, this transmission structure is relatively stable and reliable during operation, can withstand certain loads and impacts, reduces the probability of equipment failure, and reduces the maintenance cost and downtime of the equipment.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A flame cutting machine for elbow processing, which is used to cut a pipe (1) into pipe segments for making elbows, and is characterized in that, Comprising: A circular guide rail (2) for sleeving on a pipeline (1). A moving seat (3) is slidably arranged on the outer peripheral wall of the circular guide rail (2). A flame cutting gun (4) is installed on the moving seat (3), and the flame cutting gun (4) extends to one side of the circular guide rail (2) to correspond to the part to be cut of the pipeline (1). Reducing pads (5), there are several of them. Several reducing pads (5) are detachably arranged on the inner peripheral wall of the circular guide rail (2). One end face of the reducing pad (5) away from the circular guide rail (2) abuts against the pipeline (1). The reducing pad (5) can change its diameter according to the change of the diameter of the pipeline (1) so as to fix the circular guide rail (2) on the pipeline (1). The reducing pad (5) includes: A fixed block (51) arranged on the inner peripheral wall of the circular guide rail (2). A sliding block (52) is slidably arranged on the fixed block (51) along the radial direction of the circular guide rail (2). One side of the sliding block (52) away from the fixed block (51) has an abutting surface (521). The sliding block (52) can slide towards the axis side of the circular guide rail (2) to extend out of the fixed block (51) and abut against the outer peripheral wall of the pipeline (1) through the abutting surface (521).

2. The flame cutting machine for elbow processing according to claim 1, characterized in that, The fixed block (51) is provided with a groove (510), and the opening of the groove (510) faces the axis of the circular guide rail (2). The sliding block (52) is slidably arranged in the groove (510) along the radial direction of the circular guide rail (2). The sliding block (52) can slide out of the groove (510) so that the abutting surface (521) abuts against the outer wall of the pipeline (1).

3. The flame cutting machine for elbow processing according to claim 2, characterized in that, Several sliding blocks (52) enclose a pipe-passing space (53) at the axis of the circular guide rail (2). The maximum diameter of the pipe-passing space (53) is the straight-line distance from the end face of the fixed block (51) away from the circular guide rail (2) to the axis.

4. The flame cutting machine for elbow processing according to claim 3, characterized in that, A tension spring (511) is arranged between the inner wall of the fixed block (51) and the outer wall of the sliding block (52). The tension spring (511) is used for elastically pulling back the sliding block (52) into the groove (510). A through groove (512) communicating with the groove (510) is opened on the end face of the fixed block (51), and the through groove (512) communicates with the groove (510). A driving mechanism (6) is arranged on the side of the circular guide rail (2). The driving mechanism (6) can extend into the through groove (512) and push the sliding block (52) to move towards the axis side of the circular guide rail (2).

5. The flame cutting machine for elbow processing according to claim 4, characterized in that, The driving mechanism (6) includes: A ring-shaped fixing plate (61) is provided on the side of the ring-shaped guide rail (2); a plurality of screw rods (62) penetrate through the ring-shaped fixing plate (61), and the screw rods (62) are rotationally matched with the ring-shaped fixing plate (61). The plurality of screw rods (62) are arranged circumferentially along the ring-shaped fixing plate (61). A top block (63) is threadedly sleeved on the screw rod (62), and the outer wall of the top block (63) is slidably abutted against the inner wall of the through groove (512). The top block (63) can enter the through groove (512) under the drive of the screw rod (62) and press the sliding block (52) towards the axial center side of the ring-shaped guide rail (2), so that the sliding block (52) presses against the outer peripheral wall of the pipeline (1).

6. The flame cutting machine for elbow processing according to claim 5, characterized in that, The top block (63) has an inclined pushing surface (630) for pushing the sliding block (52). The inclined pushing surface (630) gradually inclines towards the axial center side of the ring-shaped guide rail (2) from the side close to the fixed block (51) to the side close to the ring-shaped fixing plate (61). A convex block (7) is provided on the side wall of the sliding block (52) close to the fixed block (51), and the inclined pushing surface (630) is slidably abutted against the convex block (7).

7. The flame cutting machine for elbow processing according to claim 5, characterized in that, A first gear (82) is fixedly sleeved on the screw rod (62), and a first ring-shaped rack (81) is slidably sleeved on the ring-shaped fixing plate (61). The first ring-shaped rack (81) is concentrically arranged with the ring-shaped fixing plate (61), and the first ring-shaped rack (81) can rotate circumferentially relative to the ring-shaped fixing plate (61) to drive the first gear (82) to rotate synchronously, so that the plurality of screw rods (62) rotate synchronously.

8. The flame cutting machine for elbow processing according to claim 1, characterized in that, A receiving groove (520) is formed in the sliding block (52) and is arranged towards the axial center of the ring-shaped guide rail (2). A traveling mechanism (9) capable of driving the ring-shaped guide rail (2) to move axially along the pipeline (1) is arranged in the receiving groove (520). The traveling mechanism (9) includes: An elastic frame (91) is arranged in the receiving groove (520); A driving roller (92) is rotatably arranged on the elastic frame (91). The driving roller (92) abuts against the outer peripheral wall of the pipeline (1) under the action of the elastic frame (91). After the sliding block (52) moves away from the pipeline (1), the driving roller (92) can expose the opening of the receiving groove (520) so that the driving roller (92) drives the ring-shaped guide rail (2) to move axially along the pipeline (1).

9. The flame cutting machine for elbow processing according to claim 1, characterized in that, A displacement mechanism (11) for driving the flame cutting gun (4) to move is arranged on the moving seat (3). The displacement mechanism (11) includes: A first linear driver (1101) is arranged on the moving seat (3), and the first linear driver (1101) is used to drive the flame cutting gun (4) to move axially along the pipeline (1); The second linear driver (1102) is arranged on the movable end of the first linear driver (1101), and the main shaft of the second linear driver (1102) is perpendicular to the first linear driver (1101). The second linear driver (1102) is used to drive the flame cutting gun (4) to move radially along the pipeline (1).

10. The flame cutting machine for elbow processing according to claim 1, characterized in that, A second annular rack (10) is arranged on the outer peripheral wall of the annular guide rail (2), a second gear (12) is arranged on the moving seat (3), the second gear (12) meshes with the second annular rack (10), and the second gear (12) can move along the second annular rack (10) driven by a motor, so that the moving seat (3) moves along the annular guide rail (2).

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