Pipeline flame brazing auxiliary device and application method

Abstract

The invention provides a pipeline flame brazing auxiliary device and an application method 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 flame brazing auxiliary device.

Description

Technical Field

[0001] The invention relates to flame brazing in the field of welding, and in particular to a pipeline "flame brazing" auxiliary device and an application method. Background Art

[0002] Flame brazing is a brazing method that uses a flame formed by the combustion of the vaporized products of combustible gas or liquid fuel mixed with oxygen or air for heating. The flame itself has a two-layer structure: the outer layer is an oxidizing flame, which has the highest temperature and is rich in oxygen, which easily oxidizes the metal surface of the workpiece; the inner layer is a reducing flame, which is lower in temperature and lacks oxygen, and is rich in carbon monoxide, which helps protect the metal from oxidation. Flame brazing uses a metal or alloy material with a lower melting point than the parent metal to connect two parent materials. The molten welding rod does not fuse with the parent metal, but fills the gap between the parent metals and connects the parent metals together. In the connection of pipelines, flame brazing is usually used for construction work.

[0003] However, the inventors of this application found that the above technology has at least the following technical problems in the process of implementing the technical solution of the invention in the embodiment of this application: The flame brazing method used is: the construction workers climb to a high place, put on heat-insulating gloves, hold the pipe to be brazed tightly, lift the pipe to a certain height, and continuously rotate the pipe to cooperate with the welder to perform the welding operation. The welding efficiency is low, the physical strength of the construction workers is greatly consumed, and there are safety hazards. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the embodiment of the present application provides a pipeline "flame brazing" auxiliary device and application method for the problem that the pipeline annular "flame brazing" requires the welder to manually lift the pipeline height and rotate the pipeline angle. The pipeline "flame brazing" auxiliary device adjusts the height of the pipeline by pulling the clamping mechanism through the lifting mechanism, and at the same time, the clamping mechanism rotates with the rotating mechanism to adjust the rotating pipeline angle, thereby solving the technical problem of pipeline annular "flame brazing".

[0005] The solution adopted by the embodiment of the present application to solve the technical problem is: A pipeline "flame brazing" auxiliary device includes a gantry, a lifting mechanism, a rotating mechanism and a clamping mechanism; The gantry is used to suspend the pipeline for flame brazing operations; the lifting mechanism is installed on the upper part of the gantry and is used to raise and lower the height of the pipeline. The lifting mechanism is provided with a meshing driving gear and a rack. The driving gear is rotated to drive the rack to rise and fall, so that the height of the pipeline can be raised and lowered; the rotating mechanism is installed on the lower part of the rack and is used to rotate the angle of the pipeline, so as to adjust the welding angle of the pipeline; the clamping mechanism is installed on the lower part of the rotating mechanism and rotates with it, and the clamping mechanism is provided with ears to clamp the pipeline; wherein, the clamping mechanism clamps and fixes the pipeline, the lifting mechanism raises the height of the pipeline, and at the same time, the rotating mechanism rotates the angle of the pipeline, and the welding operation of the annular "flame brazing" weld of the pipeline is carried out by continuously adjusting the welding angle.

[0006] In order to further solve the technical problem to be solved by the embodiments of the present application, the embodiments of the present application provide a pipeline "flame brazing" auxiliary device and an application method, wherein an application method of a pipeline "flame brazing" auxiliary device comprises the following steps: First, when the welder is performing the annular "flame brazing" weld welding operation on the pipeline, he rotates the crank to make the lifting mechanism pull the clamping mechanism down to the welding work platform, compresses the spring expansion lugs, inserts one end of the pipeline into the two lugs, and tightens the bolt assembly to lock the pipeline; Secondly, rotate the crank to make the lifting mechanism pull the clamping mechanism up, lift the pipeline to the appropriate height and fix it, and then prepare for welding. The welder sits down and adjusts the welding posture to carry out welding operations. First, use a slightly carbonized outer flame to heat the weldment to increase the heating area. When the brazing area is heated to a temperature close to the melting temperature of the brazing material, the brazing flux can be applied immediately and continue to heat until it is completely melted. Secondly, when the base welding of the positive angle weld is completed, the pipe on the clamping mechanism is rotated so that it rotates along with the rotating mechanism and performs base welding of other angles; after the base welding of the weld is completed for one circle, the pipe is repeatedly rotated to complete the filling welding until the welding is completed; Finally, rotate the crank to make the lifting mechanism pull the clamping mechanism down to the welding work platform, loosen the bolt assembly and compress the spring expansion lugs, remove the pipes in the two lugs, and place them on the welding work platform; Repeat the above steps to complete the annular "flame brazing" weld of the next pipeline to be welded.

[0007] Positive effects: One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. Since the driving chain gear in the lifting mechanism of the embodiment of the present application drives the driven chain gear to rotate through the chain transmission, the transverse rotating shaft and the driving gear rotate; the driving gear is meshed with the rack, so when a force is applied to the crank, the driving chain gear drives the driven chain gear to rotate through the chain transmission, and the driving gear is meshed with the rack, converting the circular motion into linear motion, forming the lifting of the rack; the technical problem of the height adjustment of the pipeline "flame brazing" in the prior art is effectively solved, thereby achieving the technical effect of lifting the height of the pipeline "flame brazing" on demand.

[0008] 2. Since the rotating mechanism of the embodiment of the present application adopts a fixed gear set on the lower wall of the suspension box seat, the fixed gear is engaged with the rotating gear, and the lower part of the rotating gear is connected to the clamping frame of the clamping mechanism, when the clamping frame of the clamping mechanism is rotated, the rotating gear rotates while the fixed gear does not move, forming the rotation of the pipeline and then adjusting the angle of welding, assisting the welder to complete the annular "flame brazing" welding operation of the pipeline; effectively solves the technical problem that the annular "flame brazing" of the pipeline in the prior art cannot adjust the angle of the pipeline, and thus achieves the technical effect that the rotating pipeline can complete the annular "flame brazing" weld.

[0009] 3. Since the clamping mechanism of the embodiment of the present application adopts a transverse spring on the inner side of the two wings of the clamping frame, the outer side of the spring is connected to the ear piece, and a semicircular arc is provided in the middle of the ear piece, the ear piece forms a clamping claw on the spring to lock the pipeline. At the same time, due to the elasticity of the spring, the ear piece can clamp and fix pipelines of different diameters; the technical problem of requiring special tooling for pipelines of different diameters in the prior art is effectively solved, thereby achieving the technical effect of improving production efficiency.

[0010] 4. Since the clamping mechanism in the embodiment of the present application uses an ear piece to further lock the pipeline through a bolt assembly, the ear piece can lock the pipeline to position it for flame brazing operations.

[0011] The invention is suitable for use as a pipeline "flame brazing" auxiliary device and application method. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 This is the southeast isometric view of this embodiment; Figure 2 It is a southeast isometric section view of this embodiment; Figure 3This is the northwest isometric view of this embodiment; Figure 4 This is the northeast isometric view of this embodiment; Figure 5 It is a northeast isometric section view of this embodiment; Figure 6 It is a northeast isometric side section view of this embodiment; Figure 7 This is the front view of the present embodiment; Figure 8 It is a right view of this embodiment; Fig. 9 It is a top view of this embodiment; Fig.10 Send a large picture for part A; Fig.11 It is the southeast isometric view of the rotating device and the clamping device; Fig.12 It is the southeast isometric section view of the rotating device and the clamping device; Fig.13 Send a large picture for part B; Fig.14 It is the northeast isometric view of the rotating device and the clamping device; Fig.15 Send a large picture for C part; Fig.16 It is the northeast isometric side section view of the rotating device and the clamping device.

[0014] In the figure: 1. Gantry, 11. Framework, 12. Sliding seat, 121. Raised part, 2. Lifting mechanism, 21. Drive shaft, 22. Drive chain gear, 23. Crank handle, 24. Horizontal rotation axis, 25. Driven chain gear, 26. Driving gear, 27. Rack, 271. Groove part, 28. Chain guard, 3. Rotation mechanism, 31. Suspension box seat, 32. Fixed gear, 33. Turn the gears, 34. Suspension shaft, 4. Clamping mechanism, 41. Clamping frame, 42. Spring, 43. Ear pieces, 44. Bolt assembly. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill 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 invention, and the scope of the present invention is defined by the attached claims and their equivalents. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0017] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0018] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0019] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0020] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two). Similarly, "Multiple groups" refers to two or more groups (including two groups), and "multiple sheets" refers to two or more sheets (including two sheets).

[0021] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0022] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "installation" The terms "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0023] According to the instruction manual Figure 1 , 3 As shown in 4, a pipeline "flame brazing" auxiliary device includes a gantry 1, a lifting mechanism 2, a rotating mechanism 3 and a clamping mechanism 4; Gantry 1 is used to hang pipelines for flame brazing operations; The lifting mechanism 2 is assembled on the upper part of the gantry 1 and is used to lift the height of the pipeline. The lifting mechanism 2 has a meshing driving gear 26 and a rack 27. The driving gear 26 is rotated to drive the rack 27 to rise and fall, so that the height of the pipeline can be lifted and lowered. The rotating mechanism 3 is assembled at the lower part of the rack 27 and is used to rotate the angle of the pipeline, so as to adjust the welding angle of the pipeline; The clamping mechanism 4 is assembled at the lower part of the rotating mechanism 3 and rotates with it, and a lug 43 is provided on the clamping mechanism 4 to clamp the pipeline; Among them, the clamping mechanism 4 clamps and fixes the pipeline, the lifting mechanism 2 raises the height of the pipeline, and at the same time, the rotating mechanism 3 rotates the angle of the pipeline, and the welding operation of the annular "flame brazing" weld of the pipeline is carried out by continuously adjusting the angle welding.

[0024] In order to ensure the stability of the structure of this embodiment, see the attached Figure 2 , 5As shown, the gantry 1 is a split frame structure, including a frame 11 and a slide 12; the gantry 1 is composed of a symmetrical frame 11, the frame 11 has a column foot to form a column of the gantry 1, and 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, and a protrusion 121 is provided on the inner wall of the slide 12, and the protrusion 121 is constructed to be streamlined and can limit the sliding of the rack 27.

[0025] Specifically, the frame seat 12 is connected to the frames 11 on both sides by welding, and the overall strength is good.

[0026] In order to further ensure the stability of the structure of this embodiment, see the attached Figure 2 , 5 As shown in , 6, 7, 8, and 9, the lifting mechanism 2 includes a driving shaft 21, a driving chain gear 22, a crank 23, a lateral rotation shaft 24, a driven chain gear 25, a driving gear 26, a chain cover 28, and a rack 27; The drive shaft 21 is assembled on the gantry 1. First bearings are provided at both ends of the drive shaft 21. The drive shaft 21 can rotate. Specifically, the drive shaft 21 is fixed at two points and is horizontally placed in the middle of the column of the gantry 1, and extends outward through the frame 11. The crank 23 is a crank connected to the extended end of the drive shaft 21 and used to rotate the drive shaft 21; The driving chain gear 22 is assembled on the extended end of the driving shaft 21 to transmit power; The transverse rotating shaft 24 is a stepped shaft, which is mounted on the crossbeam of the gantry 1 and extends out of the side of the frame 11. Second bearings are provided at both ends of the transverse rotating shaft 24, which penetrates the slide 12 to form a rotating shaft supported at two points. The driven chain gear 25 is mounted on the extended end of the transverse rotating shaft 24, on the same side as the extended end of the driving shaft 21; the driven chain gear 25 and the driving chain gear 22 match each other and are driven by a chain; The chain cover 28 is arranged on the extended end between the driving shaft 21 and the transverse rotating shaft 24, and covers the driving chain gear 22, the driven chain gear 25 and the chain to form a safety protection net; The driving gear 26 is disposed in the middle of the transverse rotating shaft 24 and is assembled in the inner cavity of the slide seat 12, and rotates to transmit power as the transverse rotating shaft 24 rotates; The rack 27 is assembled in the inner cavity of the slide 12, the driving gear 26 is meshed with the rack 27, and the driving gear 26 rotates to drive the rack 27 to move linearly, so that the rack 27 can be raised and lowered, thereby raising the height of the pipeline; grooves 271 are provided on both sides of the rack 27, and the grooves 271 are streamlined. The grooves 271 match the raised portions 121 of the slide 12, and the rack 27 can slide and limit along the raised portions 121; a blind hole is provided at the bottom of the rack 27, wherein a limit pin is provided at the back of the teeth at the upper part of the rack 27, which is used to control the lifting and positioning of the rack 27; When a force is applied to the crank 23, the drive shaft 21 is driven to rotate, and then the chain gear 22 is driven to rotate along with the drive shaft 21. The driving chain gear 22 drives the driven chain gear 25 to rotate through the chain transmission, so that the transverse rotating shaft 24 and the driving gear 26 can rotate; the driving gear 26 is engaged with the rack 27 to convert the circular motion into linear motion, forming the lifting and lowering of the rack 27, so that the height of the rack 27 can be adjusted by rotating the crank 23.

[0027] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Since the driving chain gear 22 is used in the lifting mechanism 2 of the embodiment of the present application to drive the driven chain gear 25 to rotate through the chain transmission, the transverse rotating shaft 24 and the driving gear 26 rotate; the driving gear 26 is meshed with the rack 27, so when a force is applied to the crank 23, the driving chain gear 22 drives the driven chain gear 25 to rotate through the chain transmission, and the driving gear 26 is meshed with the rack 27, so that the circular motion is converted into linear motion, and the rack 27 is lifted and lowered; the technical problem of height adjustment of pipeline "flame brazing" in the prior art is effectively solved, thereby achieving the technical effect of lifting the pipeline "flame brazing" height on demand.

[0028] In order to optimize the structure of this embodiment, see the attached Fig.10 , 11 , 12, 13, 14, 15, 16, the rotating mechanism 3 includes a hanging box seat 31, a fixed gear 32, a rotating gear 33 and a hanging shaft 34; The hanging shaft 34 is a round shaft used to connect the rack 27. The upper end of the hanging shaft 34 is connected to the blind hole of the rack 27, and the rotating mechanism 3 can be raised and lowered along with the rack 27. The suspension box seat 31 is a rectangular parallelepiped shell with an open mouth, and a through hole is provided on the upper part of the shell for embedding the suspension shaft 34, wherein one end of the suspension shaft 34 is welded to the suspension box seat 31, and the other end is welded to the lower end surface of the rack 27. Specifically, the suspension shaft 34 is assembled on the through hole of the suspension box seat 31, and extends upward to protrude from the surface of the suspension box seat 31, and 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; an assembly hole is provided at the lower part of the shell; The fixed gear 32 is connected to the lower wall of the suspension box seat 31, and includes 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 teeth of the fixed rectangular gear ring are arranged upward; the shaft sleeve is assembled at the assembly hole of the suspension box seat 31 and covers it, and the inner diameter of the shaft sleeve corresponds to the assembly hole of the suspension box seat 31; The rotating gear 33 is mounted on the fixed gear 32, and includes a rotating rectangular gear ring and a rotating shaft. A 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, passes through the assembly hole of the suspension box seat 31, and the rotating shaft and the shaft sleeve are clearance-matched. The rotating shaft can rotate in the shaft sleeve, and through the engagement of the rotating rectangular gear ring with the fixed rectangular gear ring, the rotating gear 33 can rotate relative to the fixed gear 32, and then the rotating gear 33 can rotate.

[0029] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Since the rotating mechanism 3 of the embodiment of the present application adopts a fixed gear 32 set on the lower wall of the suspension box seat 31, the fixed gear 32 is engaged with the rotating gear 33, and 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 does not move, forming the rotation of the pipeline and then adjusting the angle of welding, assisting the welder to complete the welding operation of the annular "flame brazing" of the pipeline; it effectively solves the technical problem that the annular "flame brazing" of the pipeline in the prior art cannot adjust the angle of the pipeline, and thus achieves the technical effect that the rotating pipeline can complete the annular "flame brazing" weld.

[0030] In order to further optimize the structure of this embodiment, see the attached Fig.10 , 11 , 12, 13, 14, 15, 16, the clamping mechanism 4 includes a clamping frame 41, a spring 42, an ear piece 43 and a bolt assembly 44; 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. With the rotation of the rotating gear 33, 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. The springs 42 are symmetrically arranged on the inner sides of the two wings of the clamping frame 41, and clamp the pipeline by elastic deformation; The ear piece 43 is connected to the inner side of the spring 42. A semicircular arc is provided in the middle of the ear piece 43 for tightening the pipeline. The ear piece 43 is provided with symmetrical bolt through holes. The bolt assembly 44 passes through the bolt through hole on the ear piece 43 to close and tighten the pipeline; The ear piece 43 is fixed on the spring 42 in a cantilever manner to form a clamping claw. When the spring 42 is compressed to insert the pipeline between the two ear pieces 43, the pipeline is received between the two ear pieces 43 and locked and fixed by the bolt assembly 44.

[0031] As a conventional technical choice, in this embodiment, the spring 42 is installed horizontally, one end of which is connected to the inner wing plate of the clamping frame 41, and the other end is connected to the ear piece 43, and is fixed by welding.

[0032] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Since the clamping mechanism 4 in the embodiment of the present application adopts a transverse spring 42 on the inner side of the two wings of the clamping frame 41, the outer side of the spring 42 is connected to the ear piece 43, and a semicircular arc is provided in the middle of the ear piece 43, the ear piece 43 forms a clamping claw on the spring 42 to lock the pipeline. At the same time, due to the elasticity of the spring 42, the ear piece 43 can clamp and fix pipelines of different diameters, which effectively solves the technical problem of special tooling required for pipelines of different diameters in the prior art, thereby achieving the technical effect of improving production efficiency.

[0033] Since the clamping mechanism 4 of the embodiment of the present application uses the ear piece 43 to further lock the pipeline through the bolt assembly 44, the ear piece 43 can lock the pipeline to position it for the flame brazing operation.

[0034] A method for applying a pipeline "flame brazing" auxiliary device comprises the following steps: First, when the welder performs the annular "flame brazing" welding operation on the pipeline, he rotates the crank 23 to make the lifting mechanism 2 pull the clamping mechanism 4 down to the welding work platform, compresses the spring 42 to expand the ear piece 43, inserts one end of the pipeline into the two ear pieces 43, and tightens the bolt assembly 44 to lock and fix the pipeline; Secondly, the crank 23 is rotated to make the lifting mechanism 2 pull the clamping mechanism 4 upward, and the pipeline is lifted to an appropriate height and fixed, and the welder sits down to adjust the welding posture and perform the welding operation; wherein, the weldment is first heated with a slightly carbonized outer flame to increase the heating area, and when the brazing area is heated to a temperature close to the melting temperature of the brazing material, the brazing flux can be immediately applied, and the heating is continued until it is completely melted; Secondly, when the base welding of the positive angle weld is completed, the pipe on the clamping mechanism 4 is rotated so that it rotates along with the rotating mechanism 3 and performs base welding of other angles; after the base welding of the weld is completed for one circle, the pipe is repeatedly rotated to complete the filling welding until the welding is completed; Finally, the crank 23 is rotated to make the lifting mechanism 2 pull the clamping mechanism 4 down to the welding work platform, the bolt assembly 44 is loosened and the spring 42 is compressed to expand the ear piece 43, and the pipelines in the two ear pieces 43 are removed and placed on the welding work platform; Repeat the above steps to complete the annular "flame brazing" weld of the next pipeline to be welded.

[0035] It is worth noting that the contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the technical parameters of the driving chain gear 22, the driven chain gear 25, the driving gear 26, the rack 27, the spring 42, the ear 43, the bolt assembly 44, the fixed gear 32 and the rotating gear 33 are not specifically limited, and conventional technology can be used. In this technical solution, the first and second bearings mentioned belong to the prior art, so they are not shown in the figure and will not be described here.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipeline "flame brazing" auxiliary device, characterized by: include: A gantry (1), a lifting mechanism (2), a rotating mechanism (3) and a clamping mechanism (4); The gantry (1) is used to suspend pipelines for flame brazing operations; The lifting mechanism (2) is mounted on the upper part of the gantry (1) and is used to raise or lower the height of the pipeline. The lifting mechanism (2) is provided with a driving gear (26) and a rack (27) that mesh with each other. By rotating the driving gear (26) to drive the rack (27) to rise or fall, the height of the pipeline can be raised or lowered. The rotating mechanism (3) is mounted on the lower part of the rack (27) and is used to rotate the angle of the pipeline, so as to adjust the welding angle of the pipeline; The clamping mechanism (4) is assembled at the lower part of the rotating mechanism (3) and rotates with it, and a lug (43) is provided on the clamping mechanism (4) to clamp the pipeline; The clamping mechanism (4) clamps and fixes the pipeline, the lifting mechanism (2) raises the height of the pipeline, and at the same time, the rotating mechanism (3) rotates the angle of the pipeline. By continuously adjusting the welding angle, the welding operation of the annular "flame brazing" weld of the pipeline is performed.

2. A pipeline "flame brazing" auxiliary device according to claim 1, characterized in that: The gantry (1) is a split frame structure, comprising a frame (11) and a sliding seat (12); The gantry (1) is composed of a symmetrical frame (11), wherein the frame (11) has a column foot forming a column of the gantry (1), and a crossbeam is provided on the upper part of the column; a slide seat (12) is provided in the middle part of the frame (11), the slide seat (12) is a hollow square sleeve, and a protrusion (121) is provided on the inner wall of the slide seat (12), and the protrusion (121) is constructed in a streamlined shape and can limit the sliding of the rack (27).

3. A pipeline "flame brazing" auxiliary device according to claim 2, characterized in that: The lifting mechanism (2) comprises: a driving shaft (21), a crank handle (23), a driving chain gear (22), a transverse rotating shaft (24), a driven chain gear (25), a chain cover (28), a driving gear (26) and a rack (27); The drive shaft (21) is mounted on the gantry (1), and first bearings are provided at both ends of the drive shaft (21). The drive shaft (21) is horizontally placed in the middle of the column of the gantry (1) in a two-point support and fixed manner, and passes through the frame (11) to extend outwards; The crank (23) is a crank connected to the extended end of the drive shaft (21) and used to rotate the drive shaft (21); The driving chain gear (22) is assembled on the extended end of the driving shaft (21) to transmit power; The transverse rotating shaft (24) is a stepped shaft, which is mounted on the crossbeam of the gantry (1) and extends out of the side of the frame (11). Second bearings are provided at both ends of the transverse rotating shaft (24), which penetrate the sliding seat (12) to form a rotating shaft supported at two points. The driven chain gear (25) is mounted on the extended end of the transverse rotating shaft (24) and on the same side as the extended end of the driving shaft (21); the driven chain gear (25) and the driving chain gear (22) are matched with each other and driven by a chain; The chain cover (28) is arranged on the extended end between the driving shaft (21) and the transverse rotating shaft (24), and covers the driving chain gear (22), the driven chain gear (25) and the chain to form a safety protection net; The driving gear (26) is arranged in the middle of the transverse rotating shaft (24), assembled in the inner cavity of the slide seat (12), and rotates to transmit power as the transverse rotating shaft (24) rotates; and The rack (27) is assembled in the inner cavity of the slide seat (12), and the driving gear (26) meshes with the rack (27); groove portions (271) are provided on both sides of the rack (27), and the groove portions (271) are streamlined. The groove portions (271) match the protrusions (121) of the slide seat (12), and the rack (27) can slide along the protrusions (121) and limit their positions; a blind hole is provided at the bottom of the rack (27); When a force is applied to the crank (23), the driving shaft (21) is driven to rotate, thereby driving the chain gear (22) to rotate along with the driving shaft (21). The driving chain gear (22) drives the driven chain gear (25) to rotate through the chain transmission, so that the transverse rotation shaft (24) and the driving gear (26) can rotate; the driving gear (26) is meshed with the rack (27), so that the rack (27) can be raised and lowered, so that the height of the rack (27) can be adjusted by rotating the crank (23).

4. A pipeline "flame brazing" auxiliary device according to claim 3, characterized in that: The rotating mechanism (3) comprises: a suspension shaft (34), a suspension box seat (31), a fixed gear (32) and a rotating gear (33); The hanging shaft (34) is a round shaft used to connect the rack (27). The upper end of the hanging shaft (34) is connected to the blind hole of the rack (27), so that the rotating mechanism (3) can be raised and lowered along with the rack (27). The suspension box seat (31) is a rectangular parallelepiped shell with an open opening. A through hole is provided on the upper part of the shell for embedding a suspension shaft (34), wherein one end of the suspension shaft (34) is welded to the suspension box seat (31), and the other end is welded to the lower end surface of the rack (27). The suspension shaft (34) is assembled on the through hole of the suspension box seat (31) and extends upward to protrude from 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. An assembly hole is provided on the lower part of the shell. The fixed gear (32) is connected to the lower wall of the suspension box seat (31), and comprises a fixed rectangular gear ring and a shaft sleeve. The fixed rectangular gear ring is arranged on the top of the vertical shaft sleeve, and the teeth of the fixed rectangular gear ring are arranged upward. The shaft sleeve is assembled at the assembly hole of the suspension box seat (31) and covers it. The inner diameter of the shaft sleeve corresponds to the assembly hole of the suspension box seat (31). The 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 teeth of the rotating rectangular gear ring are 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. A pipeline "flame brazing" auxiliary device according to claim 4, characterized in that: The clamping mechanism (4) comprises: a clamping frame (41), a spring (42), a lug (43) and a bolt assembly (44); The clamping frame (41) is an inverted U-shaped plate-like structure. The upper portion of the clamping frame (41) is connected to the rotating shaft of the rotating gear (33) of the rotating mechanism (3). With the rotation of the rotating gear (33), the clamping mechanism (4) can rotate. The two wings of the clamping frame (41) are used to assemble components in the clamping mechanism (4). The 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; The ear piece (43) is connected to the inner side of the spring (42), a semicircular arc is provided in the middle of the ear piece (43) for tightening the pipeline, and symmetrical bolt through holes are provided on the ear piece (43); and The bolt assembly (44) passes through the bolt through hole on the ear piece (43) to close and tighten the pipeline; The ear piece (43) is fixed on the spring (42) in a cantilever manner to form a clamping claw. When the compression spring (42) inserts the pipeline between the two ear pieces (43), the pipeline is received between the two ear pieces (43) and locked and fixed by the bolt assembly (44).

6. The pipeline "flame brazing" auxiliary device according to claim 5 is characterized in that: 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 is fixed by welding.

7. The pipeline "flame brazing" auxiliary device according to claim 6 is characterized by: A limit pin is provided on the back of the toothed portion at the upper portion of the rack (27) for controlling the lifting and positioning of the rack (27).

8. A pipeline "flame brazing" auxiliary device application method, characterized by: A pipeline "flame brazing" auxiliary device according to any one of claims 1 to 7 comprises the following steps: First, when the welder performs the pipe annular "flame brazing" welding operation, he rotates the crank (23) to make the lifting mechanism (2) pull the clamping mechanism 4 down to the welding work platform, compresses the spring (42) to expand the ear piece (43), inserts one end of the pipe into the two ear pieces (43), and tightens the bolt assembly (44) to lock and fix the pipe; Secondly, the crank (23) is rotated to make the lifting mechanism (2) pull the clamping mechanism (4) upward, and the pipeline is raised to an appropriate height and fixed, and the welder sits down to adjust the welding posture and perform the welding operation; wherein, the weldment is first heated with a slightly carbonized outer flame to increase the heating area, and when the brazing point is heated to a temperature close to the melting temperature of the brazing material, the brazing flux can be immediately applied, and the heating is continued until it is completely melted; Secondly, when the base welding of the positive angle weld is completed, the pipe on the clamping mechanism (4) is rotated so that it rotates along with the rotating mechanism (3) and performs base welding of other angles; after the base welding of the weld is completed around one circle, the pipe is repeatedly rotated to complete the filling welding until the welding is completed; Finally, the crank (23) is rotated to make the lifting mechanism (2) pull the clamping mechanism (4) down to the welding work platform, the bolt assembly (44) is loosened and the spring (42) is compressed to expand the ear piece (43), and the pipelines in the two ear pieces (43) are removed and placed on the welding work platform; Repeat the above steps to complete the annular "flame brazing" weld of the next pipeline to be welded.

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