A flame cutting machine for elbow machining

Abstract

The present application relates to the technical field of pipeline cutting processing, and provides a flame cutting machine for elbow machining, which is used for cutting a pipeline into a pipe section for manufacturing an elbow, comprising a ring-shaped guide rail, the ring-shaped guide rail is sleeved on the pipeline, a moving seat is slidably arranged on the outer peripheral wall of the ring-shaped guide rail, a flame cutting gun is installed on the moving seat, the flame cutting gun extends out of one side of the ring-shaped guide rail and extends to the to-be-cut part of the pipeline, a plurality of variable-diameter pads are detachably arranged on the inner peripheral wall of the ring-shaped guide rail, the end face of the variable-diameter pad away from the ring-shaped guide rail abuts on the pipeline, the variable-diameter pad can be optionally provided with a groove, the opening direction of the groove is towards the axis of the ring-shaped guide rail, a sliding block is slidably arranged in the groove, and the sliding block can slide out of the groove so that the abutting surface abuts on the outer wall of the pipeline. Through the above technical scheme, the technical problem that the conventional flame cutting machine cannot automatically adapt to different pipeline diameters in the prior art is solved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of pipe cutting processing, in particular to a flame cutting machine for elbow processing. BACKGROUND

[0002] A flame cutting machine is a device that uses a gas flame (oxygen-acetylene or oxygen-propane, etc.) to preheat the metal to be cut to the ignition point, then releases a high-pressure oxygen stream to make the metal 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, a flame cutting machine is often used to cut pipe sections to make various pipe fittings.

[0003] A conventional flame cutting machine generally consists 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 gun arranged on the trolley. When cutting a pipe to make an elbow, the pipe is usually fixed on a workbench by hand, and then the cutting trolley is operated to move along the predetermined cutting line of the pipe to complete the cutting operation. However, this conventional flame cutting machine has many shortcomings: first, for pipes of 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 precision; second, the cutting process relies on manual operation, which is low in automation, not only low in efficiency, but also large in manual operation error, affecting the quality of elbow processing; third, the conventional fixing method has poor versatility, and different fixing structures need to be frequently replaced or adjusted for pipes of different diameters, increasing the complexity and labor intensity of the operation. SUMMARY

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

[0005] According to one aspect, at least one embodiment of the present application provides a flame cutting machine for elbow processing for cutting a pipe into a pipe section for making an elbow, comprising:

[0006] An annular guide rail for sleeving on the pipe, a moving seat slidingly arranged on the outer peripheral wall of the annular guide rail, a flame cutting gun mounted on the moving seat, the flame cutting gun extending to one side of the annular guide rail to correspond to the cutting part of the pipe;

[0007] The variable-diameter spacer has a plurality of variable-diameter spacers, each of which is detachably arranged on the inner circumferential wall of the annular guide rail, and the end of the variable-diameter spacer away from the annular guide rail abuts the pipeline, and the variable-diameter spacer can be selectively provided with a groove, the opening of the groove faces the axis of the annular guide rail, the sliding block is 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 the outer wall of the pipeline.

[0008] Optionally, a plurality of sliding blocks surround a pipe passing space at the axis of the annular guide rail, and the maximum diameter of the pipe passing space is the straight line distance from the end face of the fixed block away from the annular guide rail to the axis.

[0009] 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 back the sliding block into the groove; a through groove is arranged on the end face of the fixed block and communicates with the groove; the through groove communicates with the groove;

[0010] The side of the annular guide rail is provided with a driving mechanism, the driving mechanism can extend into the through groove and push the sliding block to move towards the axis of the annular guide rail.

[0011] Optionally, the driving mechanism comprises:

[0012] An annular fixed plate is arranged on the side of the annular guide rail; a plurality of screw rods are arranged through the annular fixed plate, the screw rods are rotationally matched with the annular fixed plate, the plurality of screw rods are arranged in the circumferential direction of the annular fixed plate, a top block is threadedly arranged on the screw rod, the outer wall of the top block is in sliding abutment with the inner wall of the through groove, and the top block can enter the through groove and press the sliding block towards the axis of the annular guide rail under the driving of the screw rod, so that the sliding block is pressed against the outer circumferential wall of the pipeline.

[0013] Optionally, the top block has an inclined pushing surface for pushing the sliding block, the inclined pushing surface gradually inclines towards the axis of the annular guide rail from the side close to the fixed block to the side close to the annular fixed plate, the sliding block is provided with a protrusion on the side wall close to the fixed block, and the inclined pushing surface is in sliding abutment with the protrusion.

[0014] Optionally, a first gear is fixedly arranged on the screw rod, a first annular gear rack is slidably arranged on the annular fixed plate, the first annular gear rack is concentrically arranged with the annular fixed plate, the first annular gear rack can rotate in the circumferential direction relative to the annular fixed plate, the first gear is driven to synchronously rotate, and the plurality of screw rods are synchronously rotated.

[0015] Optionally, the sliding block is provided with a containing groove arranged towards the center of the annular guide rail, and a walking mechanism capable of moving the annular guide rail along the axial direction of the pipeline is arranged in the containing groove.

[0016] An elastic frame is arranged in the containing groove.

[0017] A driving roller is rotatably arranged on the elastic frame, and the driving roller is in abutment with the outer circumferential wall of the pipeline under the action of the elastic frame; after the sliding block moves away from the pipeline, the driving roller can be exposed from the opening of the containing groove, so that the driving roller drives the annular guide rail to move along the axial direction of the pipeline.

[0018] Optionally, the moving seat is provided with a displacement mechanism for driving the movement of the flame cutting gun, and the displacement mechanism comprises:

[0019] A first linear driver is arranged on the moving seat, and the first linear driver is used for driving the movement of the flame cutting gun along the axial direction of the pipeline.

[0020] A second linear driver is arranged on the movable end of the first linear driver, and the main shaft of the second linear driver is arranged perpendicularly to the first linear driver; the second linear driver is used for driving the movement of the flame cutting gun along the radial direction of the pipeline.

[0021] Optionally, the outer circumferential wall of the annular guide rail is provided with a second annular rack, and a second gear is arranged on the moving seat; the second gear is in meshing connection with the second annular rack, and the second gear can be driven by a motor to move along the second annular rack, so that the moving seat moves along the annular guide rail.

[0022] The embodiment of the present application has the following beneficial effects:

[0023] In the present application, before the cutting operation, the annular guide rail is first sleeved on the pipeline, and the position of the sliding block on the fixed block is carefully adjusted according to the pipe diameter of the pipeline, so that the abutment surface of the sliding block is in close abutment with the outer wall of the pipeline, thereby stably and reliably fixing the annular guide rail on the pipeline. Subsequently, the flame cutting gun is adjusted to a suitable angle and position, the cutting gun is started, and the moving seat is automatically slid along the annular guide rail, and the flame cutting gun performs accurate cutting operation along the predetermined cutting line of the pipeline.

[0024] In this invention, the diameter of the annular guide rail is fixed, but by adjusting the extension distance of the sliding block on the variable diameter pad, the cutting machine can adapt to pipes of different diameters. Whether the pipe is thin or large-diameter, the stability of the pipe during cutting is guaranteed, effectively improving cutting accuracy. Furthermore, compared to traditional manual fixing methods, this structure is highly versatile, eliminating the need for frequent replacement or adjustment of the fixing structure, greatly reducing operational complexity and labor intensity. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the pipe and the flame cutting machine in one embodiment of the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure of the flame cutting machine in the embodiment;

[0028] Figure 3 for Figure 1 A schematic diagram of the variable diameter pad in the embodiment;

[0029] Figure 4 for Figure 3 A side view of the variable diameter pad in the embodiment;

[0030] Figure 5 for Figure 4 Sectional view at point AA;

[0031] Figure 6 for Figure 4 Sectional view at point BB;

[0032] Figure 7 for Figure 3 The front view of the variable diameter pad in the embodiment;

[0033] Figure 8 for Figure 7 Sectional view at CC;

[0034] Figure 9 for Figure 8 Enlarged view of a section at point D;

[0035] Figure 10 for Figure 1 A schematic diagram of the annular guide rail in the embodiment;

[0036] Figure 11 For Figure 1 Another perspective of the overall structure of the pipeline and the flame cutting machine in the embodiment is shown in the schematic diagram.

[0037] Figure 12 For Figure 11 The local enlarged view at E in the figure.

[0038] In the figure: 1, pipeline, 2, ring guide rail, 3, moving seat, 4, flame cutting gun, 5, variable-diameter cushion block, 51, fixed block, 510, groove, 511, tension spring, 512, through slot, 52, sliding block, 520, accommodating groove, 521, abutting surface, 53, pipe passing space, 6, driving mechanism, 61, ring fixing plate, 62, screw rod, 63, top block, 630, inclined pushing surface, 7, protruding block, 81, first ring gear, 82, first gear, 9, walking mechanism, 91, elastic frame, 92, driving roller, 10, second ring gear, 11, displacement mechanism, 1101, first linear driver, 1102, second linear driver, 12, second gear. DETAILED DESCRIPTION

[0039] The application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the application, and are not a limitation on the application.

[0040] In order to make the drawing simple, only the parts related to the application are shown in each figure, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some figures, only one of the parts with the same structure or function is shown, or only one of them is marked. In this text, “one” not only means “only one”, but also means “more than one”, and “several” includes “two” and “more than two”.

[0041] In this text, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0042] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0043] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationships shown in the drawings are based on the orientation or position relationships shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0044] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0045] As Figures 1 to 12 As shown in the figure, it shows a flame cutting machine for elbow machining in an embodiment of the present application, which mainly comprises an annular guide rail 2, a moving seat 3, a flame cutting gun 4 and a variable-diameter cushion block 5. The annular guide rail 2 is in the shape of a circular ring, and its inner diameter is larger than the outer diameter of the conventional pipeline 1, so it can be sleeved on the pipeline 1. When the annular guide rail 2 is sleeved on the pipeline 1, the annular guide rail 2 is concentric with the pipeline 1. The outer peripheral wall of the annular guide rail 2 is processed with an annular slide rail, specifically, the slide rail is located at both ends of the annular guide rail 2. The moving seat 3 is provided with wheels, and the outer wall of the wheels is provided with a clamping groove in the circumferential direction. The wheel housing is connected with the two sides of the annular guide rail 2 through the clamping groove in a limiting sliding manner. The flame cutting gun 4 is fixedly installed on the moving seat 3, and the nozzle of the flame cutting gun 4 protrudes from one side of the annular guide rail 2. In this way, the flame cutting gun 4 can quickly and accurately aim at the cutting part of the pipeline 1 according to the cutting needs.

[0046] The number of the variable-diameter cushion blocks 5 is 4-6, which are uniformly distributed on the inner circumferential wall of the annular guide rail 2. Each variable-diameter cushion block 5 is composed of a fixed block 51 and a sliding block 52. The fixed block 51 is detachably fixed on the inner circumferential wall of the annular guide rail 2 by bolts. The sliding block 52 is arranged on the fixed block 51 by a dovetail groove structure and slides along the radial direction of the annular guide rail 2. The end face of the sliding block 52 away from the fixed block 51 is an abutting face 521. It is worth noting that, in order to significantly increase the pressing and fixing effect of the sliding block 52 and the outer wall of the pipeline 1, a rubber pad with high elasticity and anti-skid properties can be installed on the abutting face 521, or a fine anti-skid groove can be directly opened on the abutting face 521. By increasing the friction, the fixing effect is greatly improved. The rubber pad is made of special rubber material with high temperature resistance and wear resistance. The surface can also be provided with a micro-convex structure to further enhance the friction; the anti-skid groove adopts an interlaced grid layout, which can effectively prevent sliding caused by vibration during cutting.

[0047] For example, as shown in Figure 1 Before the cutting operation, the annular guide rail 2 is first sleeved on the pipeline 1. According to the pipe diameter of the pipeline 1, the position of the sliding block 52 on the fixed block 51 is carefully adjusted, so that the abutting face 521 of the sliding block 52 tightly abuts on the outer wall of the pipeline 1, thereby stably and reliably fixing the annular guide rail 2 on the pipeline 1. Then, the flame cutting gun 4 is adjusted to an appropriate angle and position, and the cutting gun is started. By moving the seat 3, the flame cutting gun 4 can accurately cut along the predetermined cutting line of the pipeline 1.

[0048] In the present application, the diameter of the annular guide rail 2 is fixed, but by adjusting the extension distance of the sliding block 52 on the variable-diameter cushion block 5, the cutting machine can adapt to pipelines 1 of different diameters. Whether it is a thinner pipeline 1 or a large-diameter pipeline 1, the stability of the pipeline 1 during cutting can be guaranteed, and the cutting precision is effectively improved. At the same time, compared with the traditional manual fixing method, this structure has strong universality and does not need to be frequently replaced or adjusted. The complexity and labor intensity of the operation are greatly reduced.

[0049] In some examples, the fixed block 51 is provided with a groove 510 on the side 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 smoothly slide in the groove 510. The sliding block 52 can completely slide out of the groove 510, and when it slides out, the abutting face 521 can tightly fit the outer wall of the pipeline 1. The groove 510 is internally provided with a high-precision guide rail and a lubrication system. The guide rail is made of high-strength alloy steel and its surface is subjected to precision grinding and hardening treatment to reduce 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, ensuring smooth sliding.

[0050] For example, as shown in Figure 2 Specifically, when the annular guide rail 2 is sleeved on the pipeline 1, the sliding blocks 52 are slid out of the grooves 510 under the action of the driving mechanism 6 until the abutting surfaces 521 are in contact with the outer wall of the pipeline 1. It should be noted that because the driving mechanism 6 drives all the sliding blocks 52 to extend synchronously, it is not necessary to adjust the coaxiality of the annular guide rail 2 and the pipeline 1, which can greatly reduce the installation time and simplify the installation steps, and make the applicability of the device stronger. At this time, the fixing of the annular guide rail 2 is completed. When disassembling, the sliding blocks 52 are moved in the opposite direction to slide back into the grooves 510, and the annular guide rail 2 can be easily removed from the pipeline 1. The convenience of fixing and disassembling the annular guide rail 2 is improved, and the fixing effect on the pipeline 1 is also significantly enhanced.

[0051] In some examples, the sliding blocks 52 surround 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 surface 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 blocks 52 are completely retracted into the grooves 510, the pipe passing space 53 can accommodate the pipeline 1 of different diameters; when the sliding blocks 52 are extended and in contact with the pipeline 1, enough support area can be provided 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 different specifications of the pipeline 1, and the adjustment accuracy can reach ±0.1mm, which can meet the processing needs of most industrial pipelines 1.

[0052] For example, as shown in Figures 2 to 5 When cutting pipelines 1 of different diameters is needed, the annular guide rail 2 is sleeved on the pipeline 1, and the sliding blocks 52 will automatically adjust the extension length according to the diameter of the pipeline 1 to surround a pipe passing space 53 of appropriate size, so that the annular guide rail 2 is stably fixed on the pipeline 1. After cutting is completed, the sliding blocks 52 are retracted, the pipe passing space 53 is expanded, and the annular guide rail 2 is conveniently removed from the pipeline 1. The device can better adapt to pipelines 1 of different diameters, improve the versatility and applicability of the cutting machine, and at the same time ensure the reliability of the fixing of the pipeline 1.

[0053] 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 on the inner wall of the fixed block 51, and the other end is fixed on the outer wall of the sliding block 52, the elastic force direction of the tension spring 511 is towards the inside of the groove 510, and the tension spring 511 is used to pull the sliding block 52 back into the groove 510. A through groove 512 is formed on the side wall of the fixed block 51, the through groove 512 is communicated with the groove 510, and the size of the through groove 512 can ensure that the movable end of the driving mechanism 6 smoothly extends into the through groove 512. The driving mechanism 6 is arranged inside the annular guide rail 2, and the movable end of the driving mechanism 6 extends into the through groove 512. The tension spring 511 is made of high-strength alloy spring steel, has good elasticity and fatigue resistance, and can ensure that the sliding block 52 moves stably and reliably during retraction, and will not affect the normal work of the driving mechanism 6 due to excessive elastic force.

[0054] When the driving mechanism 6 is not started, the sliding block 52 is kept in or partially retracted into the groove 510 under the action of the tension spring 511. When it is necessary to fix the annular guide rail 2, the driving mechanism 6 is started, the driving mechanism 6 overcomes the elastic force of the tension spring 511, and pushes the sliding block 52 to move towards the axis direction, so that the sliding block 52 extends out of the groove 510, and the abutting surface 521 is in close contact with the outer wall of the pipeline 1, thereby completing the fixation of the annular guide rail 2. After cutting is completed, the driving mechanism 6 is turned off, and the sliding block 52 is retracted into the groove 510 under the action of the tension spring 511, thereby facilitating the disassembly of the annular guide rail 2. The cooperation of the tension spring 511 and the driving mechanism 6 realizes the automatic extension and retraction control of the sliding block 52, without the need for manual adjustment, thereby improving the automation degree and convenience of operation, and ensuring the efficiency and stability of the fixation and disassembly of the annular guide rail 2.

[0055] In some examples, the driving mechanism 6 includes an annular fixed plate 61, a screw rod 62 and a top block 63. The annular fixed plate 61 is fixedly arranged inside the annular guide rail 2, the inner diameter of the annular fixed plate 61 is greater than the maximum diameter of the pipe space 53, so as to avoid interference with the pipeline 1. The annular fixed plate 61 is uniformly distributed with a plurality of bearing seats, each bearing seat is provided with a bearing, the screw rod 62 is rotatably arranged on the annular fixed plate 61 through the bearing, and a plurality of screw rods 62 are arranged in a circumferential direction on the annular fixed plate 61. One end of each screw rod 62 is connected with the top block 63, and the outer wall of the top block 63 is in sliding abutment with the inner wall of the through groove 512, so as to offset the influence of the rotation of the screw rod 62, make the top block 63 move linearly along the through groove 512, and ensure that the top block 63 can smoothly enter the through groove 512 and press the sliding block 52 towards the axis direction under the driving of the screw rod 62. The screw rod 62 is designed with trapezoidal thread, has high transmission efficiency and self-locking performance, and can accurately control the movement distance of the top block 63; and the bearing seat is designed with a sealed structure, which can effectively prevent dust and impurities from entering the inside of the bearing, thereby prolonging the service life of the bearing.

[0056] For example, as Figure 8 andFigure 9 As shown, when it is necessary to fix the annular guide rail 2, the screw 62 is rotated. The screw 62 drives the top block 63 to move towards the axis through the threaded transmission. The top block 63 enters the through groove 512, pressing the sliding block 52, causing the sliding block 52 to move towards the axis 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, thus completing the fixing of the annular guide rail 2. After cutting, the screw 62 rotates in the opposite direction, the top block 63 retracts, and the sliding block 52 retracts into the groove 510 under the action of the tension spring 511. Through the transmission structure of screw 62 and top block 63, the sliding block 52 is precisely pushed, and the extension length of the sliding block 52 can be accurately adjusted according to the pipe 1 of different diameters, ensuring the fixing effect of the annular guide rail 2 on pipes 1 of different diameters. At the same time, the transmission of this structure is stable and reliable, and easy to operate and maintain.

[0057] In some examples, the bottom of the top block 63 is machined with a sloping push surface 630, which gradually slopes downwards along the direction from the fixed block 51 to the annular fixed plate 61. The sloping push surface 630 can tightly abut against the protrusion 7 on the sliding block 52 and slide smoothly. A protrusion 7 is fixedly provided on the outer surface of the sliding block 52 near the fixed block 51. The shape of the protrusion 7 is adapted to the sloping push surface 630, allowing it to slide smoothly on the sloping push surface 630. The contact surfaces of the sloping push surface 630 and the protrusion 7 are precision ground and polished, and coated with a friction-reducing and wear-resistant coating to reduce frictional resistance and wear during sliding, thereby improving transmission efficiency and service life. The coating material is a nano-composite ceramic material, which has excellent hardness and wear resistance, effectively extending the service life of the sloping push surface 630 and the protrusion 7.

[0058] For example, such as Figure 8 As shown, when the rotating screw 62 drives the top block 63 to move towards the axis, the inclined push surface 630 at the bottom of the top block 63 contacts the protrusion 7 on the sliding block 52. As the top block 63 continues to move, the inclined push surface 630 pushes the protrusion 7, causing the sliding block 52 to overcome the elastic force of the tension spring 511 and move towards the axis, thus extending the sliding block 52. When the screw 62 rotates in the opposite direction, the top block 63 retracts, and under the action of the tension spring 511, the protrusion 7 slides back into the groove 510 along the inclined push surface 630. The cooperation between the inclined push surface 630 and the protrusion 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 drive mechanism 6, and ensuring the stability of fixing and disassembling the annular guide rail 2.

[0059] In some examples, a first gear 82 is fixedly fitted onto each screw 62, and the first gear 82 rotates synchronously with the screw 62. An annular fixed plate 61 is provided with an annular slide rail, and the first annular rack 81, through a slider, engages with the slide rail, allowing it to slide along the annular fixed plate 61. The first annular rack 81 is concentrically arranged with the annular fixed plate 61. The tooth profile of the first annular rack 81 is adapted to the first gear 82, enabling it to mesh with several 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 carburized and quenched, resulting in high hardness and wear resistance. The slider is made of a self-lubricating material, enabling normal operation without oil lubrication and reducing maintenance workload. It can be understood that if variable diameter pads 5 are installed on both sides of the annular fixed plate 61, then a double-acting screw 62 needs to be used.

[0060] For example, such as Figure 8 and Figure 9 As shown, when several screws 62 need to rotate synchronously, the first annular rack 81 is pushed to slide along the annular fixed plate 61. The first annular rack 81 meshes with the first gear 82, driving several first gears 82 to rotate synchronously, thereby causing several screws 62 to rotate synchronously. This enables multiple top blocks 63 to move synchronously towards the axis, squeezing the sliding block 52, ensuring that the annular guide rail 2 and the pipe 1 are coaxial, and quickly and stably fixing the annular guide rail 2 onto the pipe 1. After cutting, the first annular rack 81 is pushed in the opposite direction, the screws 62 rotate in the opposite direction, and the sliding block 52 retracts. The first annular rack 81 and the first gear 82 achieve synchronous rotation of several screws 62, ensuring the synchronous extension and retraction of multiple sliding blocks 52, improving the efficiency and consistency of fixing and disassembling the annular guide rail 2, avoiding problems such as unstable fixing caused by asynchronous individual sliding blocks 52, and simplifying the operation process and reducing labor intensity.

[0061] In some examples, the sliding block 52 has a receiving groove 520, the opening of which faces the axis. A traveling mechanism 9, capable of driving the annular guide rail 2 to move axially along the pipe 1, is installed within the receiving groove 520. The traveling mechanism 9 includes an elastic frame 91 and a drive roller 92. The drive roller 92 abuts against the outer wall of the pipe 1 under the action of the elastic frame. After the sliding block 52 moves away from the pipe 1, the drive roller 92 can protrude from the opening of the receiving groove 520, allowing it to move axially along the pipe 1. The elastic frame 91 is made of high-strength spring steel plate, possessing good elasticity and toughness, effectively buffering vibrations generated during cutting while ensuring close contact between the drive roller 92 and the outer wall of the pipe 1. The surface of the drive roller 92 is covered with a layer of high-friction coefficient rubber material to increase the friction between the drive roller 92 and the outer wall of the pipe 1, ensuring that the traveling mechanism 9 can reliably drive the annular guide rail 2 to move.

[0062] Specifically, the elastic frame 91 includes a main spring assembly, a damping buffer system, an adaptive adjusting arm, and an anti-loosening locking mechanism. The main spring assembly uses a high-strength alloy steel helical spring group, and the adjusted elastic coefficient ensures stable contact pressure on the surface of pipes 1 with different diameters; the damping buffer system consists of a hydraulic damper and a rubber buffer block working together, and the damping coefficient maintains a sensitive response while efficiently absorbing high-frequency vibrations; the adaptive adjusting arm is connected to a ball joint through a telescopic linkage structure to achieve multi-dimensional adjustment, and the surface scale markings simplify the rapid positioning of the drive roller 92; the anti-loosening locking mechanism uses a combination of wedge-shaped locking blocks and fastening bolts, and the high-strength aluminum alloy material is anodized to ensure a stable and reliable connection under long-term vibration conditions. During operation, the elastic frame 91 uses the pre-tight spring force to keep the drive roller 92 in close contact with the surface of the pipe 1, forming a stable support base. During the cutting process, the hydraulic damper converts vibration energy into heat energy for dissipation, and the rubber buffer block absorbs residual micro-vibrations, providing double protection for the smooth operation of the drive roller 92. When faced with unevenness on the surface of the pipe 1 or changes in pipe diameter, the main spring assembly automatically adjusts the position of the drive roller 92 to ensure that the contact state is not affected. The coincidence of the elastic center and the force center effectively counteracts the torque generated by the cutting reaction force, significantly improving the stability and accuracy of the cutting process.

[0063] For example, such as Figure 5 As shown, when the annular guide rail 2 is fixed on the pipe 1 for cutting operations, the drive roller 92 abuts against the outer wall of the pipe 1 under the action of the elastic frame, but this does not affect the normal cutting of the flame cutting gun 4. When the cutting is completed and it is necessary to move the annular guide rail 2 along the axial direction of the pipe 1, the sliding block 52 retracts under the action of the drive mechanism 6, and the drive roller 92 exposes the opening of the receiving groove 520. At this time, the drive motor of the drive roller 92 is started, and the drive roller 92 rolls along the axial direction of the pipe 1 under the action of friction, driving the annular guide rail 2 to move along the axial direction of the pipe 1 to the next cutting position. The traveling mechanism 9 enables the annular guide rail 2 to move automatically along the axial direction of the pipe 1 without manual handling and reinstallation, improving the automation and efficiency of the cutting operation and reducing labor intensity. At the same time, the elastic frame 91 ensures good contact between the drive roller 92 and the outer wall of the pipe 1, ensuring the stability and reliability of the movement.

[0064] In some examples, the movable base 3 is equipped with a displacement mechanism 11, which includes a first linear actuator 1101 and a second linear actuator 1102. The first linear actuator 1101 can be an electric actuator, a pneumatic cylinder, or a hydraulic cylinder, etc., and is fixedly mounted on the movable base 3. Its movable end is arranged along the axial direction of the pipe 1, and is used to drive the flame cutting torch 4 to move along the axial direction of the pipe 1. Similarly, the second linear actuator 1102 can also be an electric actuator, a pneumatic cylinder, or a hydraulic cylinder, etc., and is fixedly mounted on the movable end of the first linear actuator 1101. Its movable end is arranged along the radial direction of the pipe 1, and is used to drive the flame cutting torch 4 to move radially along the pipe 1.

[0065] It should be noted that the flame cutting gun 4 is provided with an adjustable flame focusing device at the nozzle, which includes a set of rotatable guide plates and a telescopic nozzle sleeve. The guide plates 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, so that the flame energy is more concentrated, improving the cutting efficiency and quality. The nozzle sleeve can be fine-tuned 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 temperature sensors and a control system to monitor the flame temperature in real time and make automatic adjustments to avoid affecting the cutting quality due to excessive or insufficient temperature.

[0066] For example, as shown in Figure 10 Before cutting, the flame cutting gun 4 is first adjusted to the axial position of the pipeline 1 by the first linear actuator 1101 to align with the starting point of cutting, and then the radial position of the pipeline 1 is adjusted by the second linear actuator 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 by the first linear actuator 1101 and the second linear actuator 1102 according to actual needs to ensure the accuracy and quality of the cutting.

[0067] The displacement mechanism 11 enables the flame cutting gun 4 to move and adjust accurately in the axial and radial directions of the pipeline 1, meeting different cutting requirements and improving the flexibility and precision of cutting, which can adapt to various complex elbow machining requirements and improve the quality and efficiency of elbow machining.

[0068] Specifically, the first linear actuator 1101 and the second linear actuator 1102 are both screw motors or electric push rods. Screw motors can achieve small and precise displacement adjustment of the flame cutting gun 4 in the axial and radial directions due to their high precision transmission characteristics, meeting the requirements of high-precision cutting scenarios; electric push rods have the advantages of simple structure, large thrust, and fast response speed, which play an important role in situations that require high cutting efficiency and large stroke adjustment. In actual application, they can be flexibly selected and configured according to specific elbow machining process requirements.

[0069] In some examples, a second annular gear rack 10 is fixedly arranged on the outer peripheral wall of the annular guide rail 2, and the second annular gear 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. The second gear 12 is engaged with the second annular gear rack 10. The motor, the second gear 12, and the moving seat 3 are connected and supported by bearings and shafts, etc., to ensure smooth rotation of the second gear 12.

[0070] For example, as shown in Figure 11 and Figure 12As shown, the motor is started, and the motor drives the second gear 12 to rotate, and since the second gear 12 is engaged with the second annular gear rack 10, the second gear 12 moves along the second annular gear rack 10 during rotation, thereby driving the moving seat 3 to move along the annular guide rail 2. By controlling the forward and reverse rotation and the rotating 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 cut along the predetermined cutting line. The transmission structure of the second annular gear 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 mode, improves the automation degree and efficiency of the cutting operation, and at the same time, the transmission structure has high transmission precision, can ensure that the flame cutting gun 4 moves accurately according to the predetermined path, improves the cutting accuracy and stability, and ensures the quality of the elbow processing. In addition, the transmission structure is relatively stable and reliable during operation, can withstand a certain load and impact, reduces the probability of equipment failure, and reduces the maintenance cost and downtime of the equipment.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A flame cutting machine for elbow machining for cutting a pipe (1) into pipe sections for making an elbow, characterized in that, The utility model relates to a pipe cutting device, including: A ring rail (2) is used for being sleeved on a pipeline (1), a moving seat (3) is slidably arranged on the outer peripheral wall of the ring rail (2), a flame cutting gun (4) is installed on the moving seat (3), the flame cutting gun (4) extends to one side of the ring rail (2) to correspond with the cutting part of the pipeline (1); A plurality of variable-diameter pads (5) are detachably arranged on the inner peripheral wall of the ring rail (2), the end face of the variable-diameter pad (5) away from the ring rail (2) abuts on the pipeline (1), the variable-diameter pad (5) can change diameter according to the change of the pipe diameter of the pipeline (1), so that the ring rail (2) is fixed on the pipeline (1); the variable-diameter pad (5) comprises: A fixed block (51) is arranged on the inner peripheral wall of the ring rail (2); A sliding block (52) is slidably arranged on the fixed block (51) along the radial direction of the ring rail (2), the side of the sliding block (52) away from the fixed block (51) has an abutting face (521), the sliding block (52) can slide towards the axis of the ring rail (2) to extend out of the fixed block (51) and abut on the outer peripheral wall of the pipeline (1) through the abutting face (521); The fixed block (51) is provided with a groove (510), the opening of the groove (510) faces the axis of the ring rail (2), the sliding block (52) is slidably arranged in the groove (510) along the radial direction of the ring rail (2), and the sliding block (52) can slide out of the groove (510) so that the abutting face (521) abuts on the outer wall of the pipeline (1); A tension spring (511) is arranged between the inner wall of the fixed block (51) and the outer wall of the sliding block (52), and the tension spring (511) is used for elastically pulling back the sliding block (52) into the groove (510); a through groove (512) is formed in the end face of the fixed block (51) and communicates with the groove (510); A drive mechanism (6) is arranged on the side of the ring rail (2), the drive mechanism (6) can extend into the through groove (512) and push the sliding block (52) to move towards the axis of the ring rail (2); The drive mechanism (6) comprises: A plurality of screw rods (62) are arranged through the annular fixing plate (61), the screw rods (62) are in rotation fit with the annular fixing plate (61), the plurality of screw rods (62) are arranged along the circumferential direction of the annular fixing plate (61), a top block (63) is threadedly sleeved on the screw rod (62), the outer wall of the top block (63) is in sliding abutment with the inner wall of the through groove (512), and the top block (63) can enter the through groove (512) and abut against the sliding block (52) on the axis side of the annular guide rail (2) under the driving of the screw rod (62), so that the sliding block (52) is abutted against the outer circumferential wall of the pipeline (1). The sliding block (52) is provided with an accommodating groove (520) arranged towards the axis of the annular guide rail (2), and the accommodating groove (520) is provided with a walking mechanism (9) capable of driving the annular guide rail (2) to move along the axis of the pipeline (1). The walking mechanism (9) comprises: An elastic frame (91) is arranged in the accommodating groove (520); A driving roller (92) is rotationally arranged on the elastic frame (91), the driving roller (92) is in abutment with the outer circumferential wall of the pipeline (1) under the action of the elastic frame (91), and after the sliding block (52) moves away from the pipeline (1), the driving roller (92) can be exposed from the opening of the accommodating groove (520), so that the driving roller (92) drives the annular guide rail (2) to move along the axis of the pipeline (1).

2. The flame cutting machine for elbow machining according to claim 1, characterized in that, The elastic frame (91) comprises a main spring assembly, a damping buffer system, a self-adaptive adjusting arm and a anti-loose locking mechanism.

3. The flame cutting machine for elbow machining according to claim 1, characterized in that, A plurality of sliding blocks (52) surround a pipe passing space (53) at the axis of the annular guide rail (2), and the maximum diameter of the pipe passing space (53) is the straight line distance from the end face of the fixing block (51) away from the axis of the annular guide rail (2).

4. The flame cutting machine for elbow machining according to claim 1, 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 axis side of the annular guide rail (2) from the side close to the fixing block (51) to the side close to the annular fixing plate (61), and the sliding block (52) is provided with a protruding block (7) on the side wall close to the fixing block (51), and the inclined pushing surface (630) is in sliding abutment with the protruding block (7).

5. The flame cutting machine for elbow machining according to claim 1, characterized in that, A first gear (82) is fixedly sleeved on the screw rod (62), a first annular gear rack (81) is slidingly sleeved on the annular fixing plate (61), the first annular gear rack (81) is arranged concentrically with the annular fixing plate (61), the first annular gear rack (81) can rotate circumferentially relative to the annular fixing plate (61) to drive the first gear (82) to rotate synchronously, so that the plurality of screw rods (62) rotate synchronously. The moving seat (3) is provided with a displacement mechanism (11) for driving the flame cutting gun (4) to move, and the displacement mechanism (11) comprises: 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 along the axial direction of the pipeline (1); A 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 arranged perpendicularly to the first linear driver (1101), and the second linear driver (1102) is used to drive the flame cutting gun (4) to move along the radial direction of the pipeline (1).

6. The flame cutting machine for elbow machining according to claim 1, characterized in that, A second annular gear 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) is engaged with the second annular gear rack (10), and the second gear (12) can be driven by a motor to move along the second annular gear rack (10), so that the moving seat (3) moves along the annular guide rail (2).

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