Pipeline flame brazing auxiliary device

Abstract

The utility model provides a pipeline flame brazing auxiliary device in the field of welding. Comprising a portal frame, a lifting mechanism, a rotating mechanism and a clamping mechanism, the portal frame is used for hanging a pipeline for flame brazing operation; the lifting mechanism is assembled on the upper portion of the portal frame and used for lifting the pipeline, a driving gear and a rack which are meshed are arranged on the lifting mechanism, the rack is driven to ascend and descend by rotating the driving gear, and lifting of the pipeline can be achieved. The rotating mechanism is assembled on the lower portion of the rack and used for rotating the angle of the pipeline and adjusting the welding angle of the pipeline. The clamping mechanism is assembled on the lower portion of the rotating mechanism and rotates along with the rotating mechanism, and a lug clamping pipeline is arranged on the clamping mechanism. Wherein the clamping mechanism is used for clamping and fixing a pipeline, the lifting mechanism is used for lifting the height of the pipeline, meanwhile, the rotating mechanism is used for rotating the angle of the pipeline, and the welding operation of an annular flame brazing welded junction of the pipeline is carried out by continuously adjusting the angle for welding. The device is suitable for being used as a pipeline flame brazing auxiliary device.

Description

Technical Field

[0001] This utility model relates to flame brazing in the field of welding, and more particularly to an auxiliary device for flame brazing of pipelines. Background Technology

[0002] Flame brazing is a brazing method that uses a flame generated by the combustion of the vaporization products of combustible gas or liquid fuel mixed with oxygen or air for heating. The flame itself has a two-layer structure: an outer oxidizing flame, which has the highest temperature and is rich in oxygen, easily oxidizing the surface of the workpiece metal; and an inner reducing flame, which has a lower temperature, is oxygen-deficient, and rich in carbon monoxide, helping to protect the metal from oxidation. Flame brazing uses a metal or alloy with a lower melting temperature than the base metal to join two base materials. The molten electrode does not fuse with the base materials but fills the gaps between them, connecting them together. Flame brazing is commonly used for pipe connections.

[0003] However, in the process of implementing the inventive technical solution in the embodiments of this application, the inventors of this application discovered that the above-mentioned technology has at least the following technical problems:

[0004] The flame brazing welding method used involves the worker climbing to a high place, wearing heat-resistant gloves, gripping the pipe to be brazed, raising the pipe to a certain height, and continuously rotating the pipe to cooperate with the welder in the welding operation. This method has low welding efficiency, consumes a lot of physical strength from the worker, and poses safety hazards. Summary of the Invention

[0005] To address the shortcomings of existing technologies and the issue of requiring welders to manually lift and rotate the pipeline during annular flame brazing, this application provides an auxiliary device for pipeline flame brazing. This device uses a lifting mechanism to pull a clamping mechanism to adjust the pipeline height, while the clamping mechanism rotates along with a rotating mechanism to adjust the pipeline angle, thus solving the technical problem of annular flame brazing.

[0006] The solution adopted by the embodiments of this application to solve the technical problem is:

[0007] The auxiliary device for pipeline flame brazing includes a gantry, a lifting mechanism, a rotating mechanism, and a clamping mechanism;

[0008] The gantry frame is used to suspend pipelines for flame brazing operations. A lifting mechanism is mounted on the upper part of the gantry frame and used to raise and lower the pipeline. The lifting mechanism has a meshing drive gear and rack; rotating the drive gear drives the rack to rise and fall, thus raising or lowering the pipeline height. A rotating mechanism is mounted below the rack and used to rotate the pipeline, adjusting the welding angle. A clamping mechanism is mounted below the rotating mechanism and rotates with it, and has lugs to hold the pipeline. The clamping mechanism holds and fixes the pipeline, the lifting mechanism raises the pipeline height, and simultaneously, the rotating mechanism rotates the pipeline angle. By continuously adjusting the angle during welding, the annular flame brazing joint of the pipeline is welded.

[0009] To further address the technical problems to be solved in the embodiments of this application, the gantry frame provided in the embodiments of this application is a split frame structure, including a frame and a slide block; the gantry frame is composed of symmetrical frames, the frames have column feet forming the columns of the gantry frame, and the upper part of the columns is provided with crossbeams; a slide block is provided in the middle of the frame, the slide block is a hollow square sleeve, and a protrusion is provided on the inner wall of the slide block, the protrusion being constructed in a streamlined shape to limit the sliding of the rack.

[0010] Furthermore, the lifting mechanism includes a drive shaft, a drive chain gear, a crank handle, a transverse rotating shaft, a driven chain gear, a drive gear, a chain cover, and a rack;

[0011] The drive shaft is mounted on the gantry frame, with first bearings at both ends and fixed at two points. It is horizontally positioned in the middle of the gantry frame column and extends outward through the frame. The crank handle is connected to the extended end of the drive shaft and is used to rotate it. The drive chain gear is mounted on the extended end of the drive shaft to transmit power. The transverse rotating shaft is a stepped shaft, mounted on the crossbeam of the gantry frame and extending outward from the side of the frame. Second bearings are located at both ends of the transverse rotating shaft, passing through the slide to form a two-point supported rotating shaft. The driven chain gear is mounted on the extended end of the transverse rotating shaft, on the same side as the extended end of the drive shaft. The wheel and drive chain gear are matched and driven by the chain; the chain cover is set on the extended end between the drive shaft and the transverse rotation shaft, and covers the drive chain gear, driven chain gear and chain to form a safety net; the drive gear is set in the middle of the transverse rotation shaft and is assembled in the inner cavity of the slide, and rotates with the transverse rotation shaft to transmit power; the rack is assembled in the inner cavity of the slide, and the drive gear meshes with the rack; the rack has grooves on both sides, which are streamlined and match the protrusions of the slide, allowing the rack to slide along the protrusions and be limited; the bottom of the rack has blind holes.

[0012] When force is applied to the crank handle, the drive shaft rotates, which in turn drives the chain gear to rotate along with the drive shaft. The drive chain gear drives the driven chain gear to rotate through chain transmission, so that the transverse rotating shaft and the drive gear can rotate. The drive gear meshes with the rack, forming a rack lifting and lowering mechanism, so that the height of the rack can be adjusted by rotating the crank handle.

[0013] Furthermore, the rotating mechanism includes a suspension housing, a fixed gear, a rotating gear, and a hanging shaft;

[0014] The lifting shaft is a round shaft used to connect to the rack. The upper end of the lifting shaft connects to a blind hole in the rack, enabling the rotating mechanism to move up and down with the rack. The suspension housing is an open rectangular shell with a through hole in the upper part for mounting the lifting shaft. One end of the lifting shaft is welded to the suspension housing, and the other end is welded to the lower end face of the rack. The lifting shaft is assembled into the through hole of the suspension housing and extends upwards beyond the surface of the suspension housing. A gap is reserved between the upper surface of the suspension housing and the lower surface of the rack for welding operations. An assembly hole is provided in the lower part of the shell. The fixed gear is connected to the lower wall of the suspension housing and includes a fixed rectangular gear ring and a bushing. A fixed rectangular gear ring is provided at the top of the vertical bushing, with the teeth of the fixed rectangular gear ring facing upwards; the bushing is fitted into and covers the mounting hole of the suspension housing, and the inner diameter of the bushing corresponds to the mounting hole of the suspension housing; a rotating gear is fitted onto the fixed gear, including a rotating rectangular gear ring and a rotating shaft, with a rotating rectangular gear ring provided at the top of the vertical rotating shaft, and the teeth of the rotating rectangular gear ring facing downwards; the rotating shaft is inserted into the bushing of the fixed gear, passes through the mounting hole of the suspension housing, and can rotate in the bushing; through the meshing of the rotating rectangular gear ring and the fixed rectangular gear ring, the rotating gear can rotate relative to the fixed gear.

[0015] Furthermore, the clamping mechanism includes a clamping frame, springs, lugs, and bolt assemblies;

[0016] The clamping frame is an inverted U-shaped plate structure. The upper part of the clamping frame is connected to the rotating gear shaft of the rotating mechanism. As the rotating gear rotates, the clamping mechanism can rotate. The two wings of the clamping frame are used to assemble the components in the clamping mechanism. Springs are symmetrically arranged on the inner side of the two wings of the clamping frame and clamp the pipeline through elastic deformation. The lugs are connected to the inner side of the springs. A semi-circular arc is provided in the middle of the lugs for clamping the pipeline. Symmetrical bolt through holes are provided on the lugs. The bolt assembly passes through the bolt through holes on the lugs and can close and clamp the pipeline.

[0017] The ear pieces are fixed to the spring in a cantilever manner to form clamping claws. When the compressed spring inserts the pipeline between the two ear pieces, the pipeline is stored between the two ear pieces and locked in place by the bolt assembly.

[0018] Furthermore, the spring is installed horizontally, with one end connected to the inner wing plate of the clamping frame and the other end connected to the ear piece, and fixed by welding.

[0019] Furthermore, a limiting pin is provided on the back of the teeth at the top of the rack to control the lifting and positioning of the rack.

[0020] Positive effects:

[0021] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0022] 1. In the lifting mechanism of this application embodiment, the driving chain gear drives the driven chain gear to rotate through chain transmission, and the transverse rotating shaft and driving gear rotate; the driving gear meshes with the rack, so when a force is applied to the handle, the driving chain gear drives the driven chain gear to rotate through chain transmission, and the driving gear meshes with the rack, converting the circular motion into linear motion, forming rack lifting; effectively solving the technical problem of adjusting the height of pipeline flame brazing in the prior art, and thus realizing the technical effect of raising and lowering the height of pipeline flame brazing as needed.

[0023] 2. In this embodiment, the rotating mechanism employs a fixed gear on the lower wall of the suspension box, which meshes with a rotating gear. The lower part of the rotating gear is connected to the clamping frame of the clamping mechanism. Therefore, when the clamping frame of the clamping mechanism is rotated, the rotating gear rotates while the fixed gear remains stationary, resulting in the rotation of the pipeline and thus adjusting the welding angle. This assists the welder in completing the annular flame brazing of the pipeline. It effectively solves the technical problem in the prior art that the angle of the pipeline cannot be adjusted during annular flame brazing, thereby achieving the technical effect that rotating the pipeline can complete the annular flame brazing weld.

[0024] 3. In the clamping mechanism of this application embodiment, springs are horizontally placed on the inner side of the two wings of the clamping frame, and lugs are connected to the outer side of the springs. The lugs have a semi-circular arc in the middle. Therefore, the lugs form clamping claws on the springs to lock the pipeline. At the same time, due to the elasticity of the springs, the lugs can clamp and fix pipelines of different diameters. This effectively solves the technical problem in the prior art that pipelines of different diameters require special tooling, thereby achieving the technical effect of improving production efficiency.

[0025] 4. Since the clamping mechanism in this embodiment uses lugs to further lock the pipeline through a bolt assembly, the lugs can lock the pipeline for positioning during flame brazing operations.

[0026] Suitable for use as an auxiliary device for flame brazing of pipelines. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is the southeast isometric view of this embodiment;

[0029] Figure 2 This is the southeast isometric cross-sectional view of this embodiment;

[0030] Figure 3 This is the isometric view of the northwest region in this embodiment;

[0031] Figure 4 This is the northeast isometric view of this embodiment;

[0032] Figure 5 This is an isometric cross-sectional view of the northeastern region in this embodiment;

[0033] Figure 6 This is an isometric lateral section view of the northeastern part of this embodiment;

[0034] Figure 7 This is the front view of this embodiment;

[0035] Figure 8 This is the right view of this embodiment;

[0036] Figure 9 This is a top view of this embodiment;

[0037] Figure 10 Send a larger image of part A;

[0038] Figure 11 Isometric drawing of the rotating device and clamping device from the southeast.

[0039] Figure 12 This is a southeast isometric sectional view of the rotating and clamping devices;

[0040] Figure 13 Send a larger image of part B;

[0041] Figure 14 Northeast isometric drawing of the rotating and clamping devices;

[0042] Figure 15 Send a larger image of part C;

[0043] Figure 16 This is an isometric lateral section view of the rotating and clamping devices from the northeast.

[0044] In the picture:

[0045] 1. Gantry frame,

[0046] 11. Framework

[0047] 12. Slide,

[0048] 121. Protrusion,

[0049] 2. Lifting mechanism,

[0050] 21. Drive shaft,

[0051] 22. Drive chain and gear,

[0052] 23. Crank handle,

[0053] 24. Lateral rotation axis,

[0054] 25. Driven chain gear,

[0055] 26. Drive gear,

[0056] 27. Rack and pinion,

[0057] 271. Groove portion,

[0058] 28. Chain cover,

[0059] 3. Rotating mechanism,

[0060] 31. Suspension box base,

[0061] 32. Fixed gear,

[0062] 33. Turn the gear,

[0063] 34. Hanging shaft,

[0064] 4. Clamping mechanism,

[0065] 41. Clamping frame,

[0066] 42. Spring,

[0067] 43. Ear piece,

[0068] 44. Bolt assembly. Detailed Implementation

[0069] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0071] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0072] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0073] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0074] In the description of the embodiments in this application, the term "multiple" refers to two or more (including two). Similarly,

[0075] "Multiple sets" refers to two or more sets (including two sets), and "multiple tablets" refers to two or more tablets (including two tablets).

[0076] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0077] In the description of the embodiments in this application, unless otherwise expressly specified and limited, the technical term "installation" will be used.

[0078] Terms such as “connected,” “linked,” and “fixed” should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0079] According to the instruction manual Figure 1 , 3 As shown in Figure 4, the pipeline flame brazing auxiliary device includes a gantry frame 1, a lifting mechanism 2, a rotating mechanism 3, and a clamping mechanism 4;

[0080] Gantry 1 is used to suspend pipelines for flame brazing operations;

[0081] The lifting mechanism 2 is mounted on the upper part of the gantry frame 1 and is used to raise and lower the height of the pipeline. The lifting mechanism 2 has a meshing drive gear 26 and rack 27. By rotating the drive gear 26, the rack 27 is driven to rise and fall, thereby raising and lowering the height of the pipeline.

[0082] The rotating mechanism 3 is mounted on the lower part of the rack 27 and is used to rotate the angle of the pipeline, which can adjust the welding angle of the pipeline.

[0083] The clamping mechanism 4 is mounted on the lower part of the rotating mechanism 3 and rotates with it. The clamping mechanism 4 is provided with lugs 43 to clamp the pipeline.

[0084] The clamping mechanism 4 clamps and fixes the pipeline, the lifting mechanism 2 raises the height of the pipeline, and the rotating mechanism 3 rotates the angle of the pipeline. By continuously adjusting the angle for welding, the welding operation of the annular flame brazing joint of the pipeline is carried out.

[0085] To ensure the stability of the structure in this embodiment, please refer to the appendix to the specification. Figure 2 ,5 As shown, the gantry frame 1 is a split frame structure, including a frame 11 and a slide 12. The gantry frame 1 is composed of symmetrical frames 11, and the frames 11 have column feet to form the columns of the gantry frame 1. A crossbeam is provided on the upper part of the column. A slide 12 is provided in the middle of the frame 11. The slide 12 is a hollow square sleeve. A protrusion 121 is provided on the inner wall of the slide 12. The protrusion 121 is constructed in a streamlined shape and can limit the sliding of the rack 27.

[0086] Specifically, the slide 12 is connected to the frame 11 on both sides by welding, resulting in good overall strength.

[0087] To further ensure the stability of the structure in this embodiment, please refer to the appendix to the specification. Figure 2 , 5 As shown in 6, 7, 8, and 9, the lifting mechanism 2 includes a drive shaft 21, a drive chain gear 22, a crank handle 23, a transverse rotation shaft 24, a driven chain gear 25, a drive gear 26, a chain cover 28, and a rack 27.

[0088] The drive shaft 21 is mounted on the gantry frame 1. The drive shaft 21 has first bearings at both ends and can rotate. Specifically, the drive shaft 21 is horizontally placed in the middle of the column of the gantry frame 1 with two-point support and fixed, and extends outward through the frame 11.

[0089] The crank handle 23 is a crank that is connected to the extended end of the drive shaft 21 and is used to rotate the drive shaft 21.

[0090] The drive chain gear 22 is mounted on the extended end of the drive shaft 21 to transmit power;

[0091] The transverse rotation shaft 24 is a stepped shaft, which is mounted on the crossbeam of the gantry frame 1 and extends out of the side of the frame 11. The transverse rotation shaft 24 has second bearings at both ends and passes through the slide block 12 to form a rotation shaft with two-point support.

[0092] Driven chain gear 25 is mounted on the extended end of transverse rotating shaft 24, on the same side as the extended end of drive shaft 21; driven chain gear 25 and drive chain gear 22 are matched with each other and driven by chain;

[0093] The chain cover 28 is installed on the extended end between the drive shaft 21 and the transverse rotation shaft 24, and covers the drive chain gear 22, the driven chain gear 25 and the chain to form a safety protection net;

[0094] The drive gear 26 is located in the middle of the transverse rotating shaft 24 and is fitted into the inner cavity of the slide 12. It rotates and transmits power as the transverse rotating shaft 24 rotates.

[0095] The rack 27 is fitted into the inner cavity of the slide 12. The drive gear 26 meshes with the rack 27. The rotational motion of the drive gear 26 drives the rack 27 to move linearly, allowing the rack 27 to rise and fall, thereby increasing the height of the pipeline. Grooves 271 are provided on both sides of the rack 27. The grooves 271 are streamlined and match the protrusions 121 of the slide 12. The rack 27 can slide along the protrusions 121 and be limited. A blind hole is provided at the bottom of the rack 27. A limiting pin is provided on the back of the upper teeth of the rack 27 to control the rising and falling positioning of the rack 27.

[0096] When a force is applied to the crank handle 23, it drives the drive shaft 21 to rotate, which in turn drives the chain gear 22 to rotate along with the drive shaft 21. The drive chain gear 22 drives the driven chain gear 25 to rotate through the chain drive, so that the transverse rotating shaft 24 and the drive gear 26 can rotate. The drive gear 26 meshes with the rack 27, converting the circular motion into linear motion, causing the rack 27 to rise and fall, so that the height of the rack 27 can be adjusted by rotating the crank handle 23.

[0097] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0098] In this embodiment of the lifting mechanism 2, the driving chain gear 22 drives the driven chain gear 25 to rotate via chain transmission, and the transverse rotating shaft 24 and the driving gear 26 rotate. The driving gear 26 meshes with the rack 27. Therefore, when a force is applied to the crank handle 23, the driving chain gear 22 drives the driven chain gear 25 to rotate via chain transmission, and the driving gear 26 meshes with the rack 27, converting the circular motion into linear motion, thus causing the rack 27 to rise and fall. This effectively solves the technical problem of adjusting the height of pipeline flame brazing in the prior art, and thus achieves the technical effect of raising and lowering the height of pipeline flame brazing as needed.

[0099] To optimize the structure of this embodiment, please refer to the appendix to the specification. Figure 10 , 11 As shown in 12, 13, 14, 15, and 16, the rotating mechanism 3 includes a suspension box base 31, a fixed gear 32, a rotating gear 33, and a hanging shaft 34;

[0100] The lifting shaft 34 is a round shaft used to connect the rack 27. The upper end of the lifting shaft 34 is connected to the blind hole of the rack 27, which can raise and lower the rotating mechanism 3 along with the rack 27.

[0101] The suspension housing 31 is a rectangular shell with an open opening. A through hole is provided in the upper part of the shell for mounting the suspension shaft 34. One end of the suspension shaft 34 is welded to the suspension housing 31, and the other end is welded to the lower end face of the rack 27. Specifically, the suspension shaft 34 is assembled in the through hole of the suspension housing 31 and extends upward out of the surface of the suspension housing 31. A gap is reserved between the upper surface of the suspension housing 31 and the lower surface of the rack 27 for welding operations. An assembly hole is provided in the lower part of the shell.

[0102] The fixed gear 32 is connected to the lower wall of the suspension housing 31 and includes a fixed rectangular gear ring and a bushing. The fixed rectangular gear ring is provided on the top of the vertical bushing, and the tooth profile of the fixed rectangular gear ring is set upward. The bushing is fitted into the mounting hole of the suspension housing 31 and covers it. The inner diameter of the bushing corresponds to the mounting hole of the suspension housing 31.

[0103] The rotating gear 33 is mounted on the fixed gear 32 and includes a rotating rectangular gear ring and a rotating shaft. The rotating rectangular gear ring is provided on the top of the vertical rotating shaft, and the teeth of the rotating rectangular gear ring are set downward. The rotating shaft is inserted into the bushing of the fixed gear 32 and passes through the mounting hole of the suspension housing 31. The rotating shaft and the bushing are clearance-fitted, and the rotating shaft can rotate in the bushing. Through the meshing of the rotating rectangular gear ring and the fixed rectangular gear ring, the rotating gear 33 can rotate relative to the fixed gear 32, and thus the rotating gear 33 can rotate.

[0104] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0105] In this embodiment, the rotating mechanism 3 employs a fixed gear 32 on the lower wall of the suspension housing 31, with a rotating gear 33 meshing on the fixed gear 32. The lower part of the rotating gear 33 is connected to the clamping frame 41 of the clamping mechanism 4. Therefore, when the clamping frame 41 of the clamping mechanism 4 is rotated, the rotating gear 33 rotates while the fixed gear 32 remains stationary, resulting in the rotation of the pipeline and thus adjusting the welding angle. This assists the welder in completing the annular flame brazing of the pipeline. It effectively solves the technical problem in the prior art that the annular flame brazing of the pipeline cannot adjust the pipeline angle, thereby achieving the technical effect that rotating the pipeline can complete the annular flame brazing weld joint.

[0106] To further optimize the structure of this embodiment, please refer to the appendix to the specification. Figure 10 , 11 As shown in 12, 13, 14, 15, and 16, the clamping mechanism 4 includes a clamping frame 41, a spring 42, an ear piece 43, and a bolt assembly 44;

[0107] The clamping frame 41 is an inverted U-shaped plate structure. The upper part of the clamping frame 41 is connected to the rotating shaft of the rotating gear 33 of the rotating mechanism 3. As the rotating gear 33 rotates, the clamping mechanism 4 can rotate. The two wings of the clamping frame 41 are used to assemble the components in the clamping mechanism 4.

[0108] Springs 42 are symmetrically arranged on the inner sides of the two wings of the clamping frame 41, and clamp the pipeline through elastic deformation;

[0109] The ear piece 43 is connected to the inner side of the spring 42. A semi-circular arc is provided in the middle of the ear piece 43 for clamping the pipe. Symmetrical bolt through holes are provided on the ear piece 43.

[0110] Bolt assembly 44 passes through bolt through hole on lug 43, which can close and tighten the pipeline;

[0111] The ear piece 43 is fixed to the spring 42 in a cantilever manner to form a clamping claw. When the spring 42 is compressed, the pipe is inserted between the two ear pieces 43 and the pipe is stored and locked between the two ear pieces 43 by the bolt assembly 44.

[0112] As a conventional technical choice, in this embodiment, the spring 42 is installed horizontally, with one end connected to the inner wing plate of the clamping frame 41 and the other end connected to the ear piece 43, and the connection and fixation are made by welding.

[0113] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0114] Because the clamping mechanism 4 in this embodiment uses springs 42 horizontally placed on the inner side of the two wings of the clamping frame 41, and ear pieces 43 connected to the outer side of the springs 42, with a semi-circular arc in the middle of the ear pieces 43, the ear pieces 43 form clamping claws on the springs 42 to lock the pipeline. At the same time, due to the elasticity of the springs 42, the ear pieces 43 can clamp and fix pipelines of different diameters. This effectively solves the technical problem in the prior art that pipelines of different diameters require special tooling, thereby achieving the technical effect of improving production efficiency.

[0115] Since the clamping mechanism 4 in this embodiment uses ear plate 43 to further lock the pipeline through bolt assembly 44, the ear plate 43 can lock the pipeline for positioning during flame brazing operation.

[0116] It is worth noting that all contents not described in detail in the specification are existing technologies known to those skilled in the art, and the technical parameters of the drive chain gear 22, driven chain gear 25, drive gear 26, rack 27, spring 42, lug 43, bolt assembly 44, fixed gear 32 and rotating gear 33 are not specifically limited, and conventional technologies can be used. The first and second bearings mentioned in this technical solution are not shown in the figure because they are existing technologies, and will not be described here.

[0117] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pipeline flame brazing auxiliary device, characterized in that it comprises: a portal frame (1) for suspending a pipeline for flame brazing operation; a lifting mechanism (2) assembled on the upper part of the portal frame (1) and used for lifting the height of the pipeline, having a driving gear (26) and a rack (27) engaged on the lifting mechanism (2), the driving gear (26) is rotated to drive the rack (27) to lift, so as to realize the lifting of the height of the pipeline; a rotating mechanism (3) assembled on the lower part of the rack (27) and used for rotating the angle of the pipeline, which can adjust the welding angle of the pipeline; and a clamping mechanism (4) assembled on the lower part of the rotating mechanism (3) and rotating with it, having an ear piece (43) clamping the pipeline on the clamping mechanism (4); wherein the clamping mechanism (4) clamps and fixes the pipeline, the lifting mechanism (2) lifts the height of the pipeline, and at the same time, the rotating mechanism (3) rotates the angle of the pipeline, through continuous adjustment of the angle of welding, the welding operation of the pipeline annular flame brazing weld is carried out.

2. The pipeline flame brazing auxiliary device according to claim 1, characterized in that the portal frame (1) is a split frame structure, comprising a frame (11) and a sliding seat (12); the portal frame (1) is composed of symmetrical frames (11), the frame (11) has a column foot forming a column of the portal frame (1), and a cross beam is arranged on the upper part of the column; the sliding seat (12) is arranged on the middle part of the frame (11), the sliding seat (12) is a hollow square sleeve, a protruding part (121) is arranged on the inner wall of the sliding seat (12), the protruding part (121) is configured in a streamline shape and can limit the sliding of the rack (27).

3. The pipeline flame brazing auxiliary device according to claim 2, characterized in that the lifting mechanism (2) comprises: a driving shaft (21) assembled on the portal frame (1), the driving shaft (21) has first bearings arranged at both ends thereof and is supported in a two-point fixed manner, is transversely arranged on the middle part of the column of the portal frame (1), and extends outwardly through the frame (11); a crank handle (23) connected to the outwardly extending end of the driving shaft (21) and used for rotating the driving shaft (21); a driving chain gear (22) assembled on the outwardly extending end of the driving shaft (21) to transmit power; a transverse rotating shaft (24) which is a stepped shaft, is assembled on the cross beam of the portal frame (1) and extends out of the side of the frame (11), has second bearings arranged at both ends thereof and penetrates through the sliding seat (12) to form a two-point supported rotating shaft; and a driven chain gear (25) assembled on the outwardly extending end of the transverse rotating shaft (24) and on the same side of the outwardly extending end of the driving shaft (21), the driven chain gear (25) and the driving chain gear (22) are matched with each other and are driven by a chain. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Chain cover (28), the chain cover (28) is provided on the overhanging end between the drive shaft (21) and the transverse rotating shaft (24), and the drive chain gear (22), the driven chain gear (25) and the chain cage cover form a safety fence; The drive gear (26) is arranged in the middle of the transverse rotating shaft (24), is assembled in the inner cavity of the sliding seat (12), and rotates the transmission power along with the rotation of the transverse rotating shaft (24); and The rack (27) is assembled in the inner cavity of the sliding seat (12), the drive gear (26) is engaged with the rack (27), recessed portions (271) are arranged on both sides of the rack (27), the recessed portions (271) are configured as streamline, the recessed portions (271) are matched with the convex portions (121) of the sliding seat (12), the rack (27) can slide along the convex portions (121) and be limited, and blind holes are arranged at the bottom of the rack (27); When the action force is applied to the handle (23), the drive shaft (21) is rotated, then the drive chain gear (22) rotates along with the drive shaft (21), the drive chain gear (22) drives the driven chain gear (25) to rotate through the chain transmission, so that the transverse rotating shaft (24) and the drive gear (26) can rotate; the drive gear (26) is engaged with the rack (27), the rack (27) is lifted, and the height of the rack (27) can be adjusted by rotating the handle (23).

4. The pipe flame brazing auxiliary device according to claim 3, characterized in that: The rotating mechanism (3) comprises: A hanging shaft (34) is a circular shaft for connecting the rack (27), the upper end of the hanging shaft (34) is connected with the blind hole of the rack (27), and the rotating mechanism (3) can be lifted along with the rack (27); A suspension box seat (31) is a rectangular shell with an opening, a through hole is arranged on the upper part of the shell for embedding the hanging shaft (34), one end of the hanging shaft (34) is welded on the suspension box seat (31), the other end is welded with the lower end surface of the rack (27), the hanging shaft (34) is assembled on the through hole of the suspension box seat (31) and protrudes out of the surface of the suspension box seat (31), a gap is reserved between the upper surface of the suspension box seat (31) and the lower surface of the rack (27) for welding operation, and an assembly hole is arranged on the lower part of the shell; A fixed gear (32) is connected with the lower wall of the suspension box seat (31), comprises a fixed rectangular gear ring and a shaft sleeve, a fixed rectangular gear ring is arranged on the top of the vertical shaft sleeve, and the tooth shape of the fixed rectangular gear ring is arranged upward; the shaft sleeve is assembled at the assembly hole of the suspension box seat (31) and is covered by the suspension box seat (31), and the inner diameter of the shaft sleeve corresponds to the assembly hole of the suspension box seat (31); and A fixed gear (32) is connected with the lower wall of the suspension box seat (31), comprises a fixed rectangular gear ring and a shaft sleeve, a fixed rectangular gear ring is arranged on the top of the vertical shaft sleeve, and the tooth shape of the fixed rectangular gear ring is arranged upward; the shaft sleeve is assembled at the assembly hole of the suspension box seat (31) and is covered by the suspension box seat (31), and the inner diameter of the shaft sleeve corresponds to the assembly hole of the suspension box seat (31); and A rotating gear (33) is sleeved on the fixed gear (32) and comprises a rotating rectangular gear ring and a rotating shaft. The rotating rectangular gear ring is arranged on the top of the vertical rotating shaft and the tooth shape of the rotating rectangular gear ring is arranged downward. The rotating shaft is inserted into the shaft sleeve of the fixed gear (32) and passes through the assembly hole of the suspension box seat (31). The rotating shaft can rotate in the shaft sleeve. Through the meshing of the rotating rectangular gear ring and the fixed rectangular gear ring, the rotating gear (33) can rotate relative to the fixed gear (32).

5. The pipe flame brazing auxiliary device according to claim 4, characterized in that: The clamping mechanism (4) comprises: A clamping frame (41) is an inverted U-shaped plate structure. The upper part of the clamping frame (41) is connected with the rotating shaft of the rotating gear (33) of the rotating mechanism (3). The clamping mechanism (4) can rotate with the rotation of the rotating gear (33). The two wings of the clamping frame (41) are used to assemble the components in the clamping mechanism (4). A spring (42) is symmetrically arranged on the inner side of the two wings of the clamping frame (41) and clamps the pipe through elastic deformation. The ear piece (43) is connected to the inner side of the spring (42). A semicircle is arranged in the middle of the ear piece (43) to clamp the pipe. Symmetrical bolt through holes are arranged on the ear piece (43). A bolt assembly (44) passes through the bolt through holes on the ear piece (43) and can clamp the pipe. The ear piece (43) is fixed on the spring (42) in a cantilever manner to form a clamping jaw. When the spring (42) is compressed and the pipe is inserted between the two ear pieces (43), the pipe is received between the two ear pieces (43) and locked by the bolt assembly (44).

6. The pipe flame brazing auxiliary device according to claim 5, characterized in that: The spring (42) is installed horizontally. One end of the spring (42) is connected with the inner wing plate of the clamping frame (41) and the other end of the spring (42) is connected with the ear piece (43) by welding.

7. The pipe flame brazing auxiliary device according to claim 1, characterized in that: A limit pin shaft is arranged on the back of the tooth part of the upper part of the rack (27) to control the lifting and positioning of the rack (27).

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