CN111515567B - Longitudinal seam welding protection structure, barrel longitudinal seam welding device and corresponding welding method - Google Patents
Longitudinal seam welding protection structure, barrel longitudinal seam welding device and corresponding welding method Download PDFInfo
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- CN111515567B CN111515567B CN202010293269.9A CN202010293269A CN111515567B CN 111515567 B CN111515567 B CN 111515567B CN 202010293269 A CN202010293269 A CN 202010293269A CN 111515567 B CN111515567 B CN 111515567B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/003—Cooling means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/006—Safety devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/12—Vessels
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Abstract
The invention discloses a longitudinal joint welding protection structure, a cylinder longitudinal joint welding device and a corresponding welding method, wherein the longitudinal joint welding protection structure comprises a welding joint outer protection component and a welding joint inner protection component, the welding joint outer protection component comprises a pair of outer cooling liners which are suitable for being attached to cylinders on two sides of a longitudinal joint from the outer side of the cylinder, and a pair of outer cooling pipelines which are correspondingly connected in the pair of outer cooling liners in a one-to-one mode along the length direction of the outer cooling liners; the welding seam inner protection assembly comprises an inner cooling liner, a notch, an air pipe and a pair of inner cooling pipelines, wherein the inner cooling liner is suitable for being attached to the barrel on two sides of the longitudinal joint from the inner side of the barrel, the notch is formed in the cooling liner along the length direction of the inner cooling liner and towards the longitudinal joint, the air pipe is communicated with the notch, and the pair of inner cooling pipelines are arranged in the inner cooling liner along the length direction of the inner cooling liner and located on two sides of the air pipe in the radial direction. The invention can optimize the welding effect on the longitudinal seam of the cylinder body.
Description
Technical Field
The invention relates to the technical field of welding processes, in particular to a longitudinal seam welding protection structure, a barrel longitudinal seam welding device and a corresponding welding method.
Background
The stainless steel tank body is mainly formed by assembling and welding a tank body and an end enclosure, the tank body is generally formed by rolling and welding a stainless steel plate, for austenitic stainless steel, the temperature is in a temperature sensitization range between 450 ℃ and 850 ℃, and if the stay time in the temperature range is too long in the welding process or after welding, the chromium-poor effect is caused, the intergranular corrosion is further caused, and therefore the tank body is suitable for being rapidly cooled after welding. Secondly, stainless steel is easy to oxidize and blacken at high welding temperature, and the blacking is more serious when the heat input is larger, so that the welding needs to be protected by inert gas, such as Ar, He or N when MIG welding or TIG welding is adopted2And the like. That is to sayWhen the steel is welded, inert gas is filled for protection, and rapid cooling for protection is also needed.
For the welding seam outside the cylinder, the protective gas device and the welding gun are integrated into a whole, and when in welding operation, the gas is firstly introduced and then welded; after welding is finished, gas is removed; the protective gas is discharged early to late, the welding seam and the heat affected zone are protected in real time, oxidation is reduced, welding quality is improved, when the thickness of the cylinder wall is large, heat input quantity is large, and a copper liner or a cooling system can be added to the welding device to prevent continuous oxidation at high temperature after welding so as to facilitate quick heat dissipation and cooling of the welding device.
The welding seam in the cylinder is generally sealed by tinfoil paper or a special plug, and then protective gas is continuously filled until the protective gas expels the air in the cylinder or the air is reduced to a specified small content index and then welding is carried out; and after welding, continuously ventilating until the temperature of the welding line is lower than the sensitization temperature, and then withdrawing. It is characterized in that:
1. the gas filling time is long, the waiting time in the welding process is long, and particularly when the inner volume of the cylinder is large, the gas filling time is as long as several hours;
2. the consumption of protective gas is large, the waste is serious, and the recovery is inconvenient. The purity of the protective gas is generally higher, even up to 99.999 percent, and the protective gas is mixed with air after being filled into the cylinder, so that the purity is reduced, even if the protective gas is recycled, purification is needed, and the cost is high;
3. the cooling efficiency is low, and the residence time at high temperature is long. Especially for thick-wall cylinders, the heat input and heat absorption are both large, the fluidity of air or protective gas is small, and the heat dissipation efficiency is low.
4. The production efficiency is low, and the production efficiency is low because the waiting time before welding and after welding is long and the turnover efficiency is low.
Disclosure of Invention
The invention aims to provide a longitudinal seam welding protection structure to solve the technical problem of optimizing the welding effect on the longitudinal seam of a cylinder.
The second purpose of the invention is to provide a welding device for the longitudinal seam of the cylinder, so as to solve the technical problem of optimizing the welding effect on the longitudinal seam of the cylinder.
The third purpose of the invention is to provide a cylinder longitudinal seam welding method, so as to solve the technical problem of optimizing the welding effect on the cylinder longitudinal seam.
The seam welding protection structure of the invention is realized by the following steps:
a seam weld protection structure comprising:
the welding seam outer protection assembly comprises a pair of outer cooling liners and a pair of outer cooling pipelines, wherein the pair of outer cooling liners are suitable for being attached to the cylinder body on two sides of the longitudinal seam from the outer side of the cylinder body, and the pair of outer cooling pipelines are correspondingly matched and connected in the pair of outer cooling liners along the length direction of the outer cooling liners in a one-to-one mode;
the welding seam internal protection assembly comprises an internal cooling liner, a slot and a gas pipe, wherein the internal cooling liner is suitable for being attached to the barrel on two sides of the longitudinal joint from the inner side of the barrel, the slot is arranged on the cooling liner along the length direction of the internal cooling liner and towards the longitudinal joint, the gas pipe is communicated with the slot, and a pair of internal cooling pipelines are arranged in the internal cooling liner along the length direction of the internal cooling liner and on two sides of the gas pipe in the radial direction.
In a preferred embodiment of the present invention, for two end portions of each of the pair of inner cooling pipes, one end portion is communicated with the pair of inner cooling pipes through a first U-shaped connecting pipe, and the other end portion is communicated with the pair of outer cooling pipes through a second U-shaped connecting pipe in a one-to-one correspondence manner; and
the ends of the pair of outer cooling pipes which are not connected with the second U-shaped connecting pipe are respectively connected with an opening pipe.
In a preferred embodiment of the present invention, a plug is respectively filled at two ends of the air tube; and
for two plugs at two ends of the air pipe, one plug is connected with a gas circulation pipe, and one end of the gas circulation pipe, which is far away from the plug, is connected with an oxygen meter; and the other plug is connected with a gas inlet pipe, and one end of the gas inlet pipe, which is far away from the plug, is connected with a gas tank.
In a preferred embodiment of the invention, one end of the two plugs, which is connected with the gas inlet pipe and is far away from the gas inlet pipe, is also connected with a gas diffusion pipe communicated with the gas inlet pipe through the plug; and
and the circumferential side wall of the gas diffusion pipe is provided with a spiral gas outlet groove which penetrates through the side wall.
In a preferred embodiment of the present invention, the air tube is provided with an air outlet groove along the length direction thereof, wherein the air outlet groove corresponds to the notch groove and is suitable for facing the longitudinal seam; and
the included angle alpha of the air outlet grooves is larger than the crevasse angle beta of the longitudinal seam.
The cylinder longitudinal seam welding device is realized as follows:
a barrel longitudinal seam welding device comprises:
the cylinder supporting mechanism comprises a supporting bracket and a base, wherein the supporting bracket is suitable for supporting the cylinder from the bottom of the cylinder, and the base is fixedly connected with the bottom of the supporting bracket;
the longitudinal seam welding mechanism comprises a welding gun suitable for welding the longitudinal seam of the barrel and a mechanical arm connected with the welding gun to drive the welding gun to move;
longitudinal seam welding protective structure.
In a preferred embodiment of the invention, the barrel longitudinal seam welding device further comprises a supporting beam adapted to support an internal cooling lining of the longitudinal seam welding protection structure from the inside of the barrel;
the supporting beam is concavely provided with a strip-shaped assembly groove suitable for embedding the internal cooling liner; and
two ends of the supporting beam in the width direction are respectively connected with a beam supporting frame.
In a preferred embodiment of the invention, the cylinder longitudinal seam welding device further comprises a pressing frame which is suitable for pressing against the side end, away from the cylinder, of the outer cooling liner of the longitudinal seam welding protection structure from the outer side of the cylinder;
the pressing frame is matched and connected with the outer cooling liner through pins or screws.
In a preferred embodiment of the present invention, two ends of the pressing frame in the width direction are respectively connected to a pressing fixing frame.
The welding method of the longitudinal seam of the cylinder body is realized as follows:
a cylinder longitudinal seam welding method adopts the cylinder longitudinal seam welding device; the method comprises the following steps:
step S1: after the barrel is manufactured, the longitudinal seams of the long strips are pre-connected by spot welding, an arc striking plate with the same thickness as the barrel is welded at one end of the barrel, and an arc extinguishing plate with the same thickness as the barrel is welded at the other end of the barrel;
step S2: erecting the cylinder on a support bracket;
step S3: arranging the outer protection assembly of the welding seam on the outer side of the cylinder body, and arranging the inner protection assembly of the welding seam on the inner side of the cylinder body, so that the center of the longitudinal welding seam is aligned with the center of the air pipe of the inner protection assembly of the welding seam;
step S4: filling inert gas into the gas pipe, and monitoring the oxygen content in the gas pipe in real time; when the oxygen content in the air pipe is lower than a designated index, a water circulation loop formed by an outer cooling pipeline and an inner cooling pipeline of the longitudinal joint welding protection structure is started, after water is introduced into the water circulation loop, a welding instruction is started again, a welding gun completes welding along an arc striking plate, a longitudinal joint and an arc quenching plate in sequence, water flow and inert gas are continuously introduced after the welding is completed, and when the welding line is cooled to the normal temperature, the water circulation loop and the inflation system are closed in sequence.
By adopting the technical scheme, the invention has the following beneficial effects: according to the longitudinal seam welding protection structure, the barrel longitudinal seam welding device and the corresponding welding method, two protection modes of a water cooling protection process and a protective gas protection process are adopted for synchronous protection, and the inner side and the outer side of the longitudinal seam on the barrel are synchronously protected by matching with the cooperation of the inner cooling liner and the outer cooling liner, so that the protection effect of the barrel longitudinal seam in the welding process is greatly optimized. In addition, when the longitudinal seam of the cylinder body is welded, protective gas is only needed to be filled into the air pipe instead of being filled into the whole cylinder body, so that the gas consumption can be greatly introduced.
Drawings
FIG. 1 is a schematic view of a longitudinal seam welded protective structure of the present invention;
FIG. 2 is a schematic view of the outer and inner weld protector assemblies of the longitudinal weld welded protector structure of the present invention;
FIG. 3 is a schematic view of the connection of the outer cooling ducts to the inner cooling ducts of the longitudinal seam weld guard structure of the present invention;
FIG. 4 is a schematic view of the included angle of the air outlet grooves of the air pipes of the longitudinal seam welding protective structure and the angle of the crevasse of the longitudinal seam;
FIG. 5 is a schematic view of the gas shield of the longitudinal seam welded shield structure of the present invention;
FIG. 6 is a schematic view of the construction of a gas diffusion tube of the longitudinal seam welded protective structure of the present invention;
FIG. 7 is a schematic structural view of the barrel of the longitudinal seam welded protective structure of the present invention;
FIG. 8 is a schematic structural view of the support beam of the present invention in engagement with an internal cooling liner;
FIG. 9 is a schematic view of the press frame of the present invention in a state of being engaged with an outer cooling pad;
FIG. 10 is a schematic view of a longitudinal seam welding apparatus for a can according to the present invention;
FIG. 11 is a schematic sectional view taken along line A of FIG. 10;
fig. 12 is a schematic structural view of a beam support and a pressing fixture of the longitudinal seam welding device for a cylinder according to the present invention.
In the figure: the device comprises a cylinder 1, a longitudinal seam 2, an outer cooling pipeline 3, an arc-shaped recess 4, an outer cooling liner left split part 51, an outer cooling liner right split part 52, a gas pipe 6, an inner cooling pipeline 7, an arc-shaped notch 8, a slot 9, an inner cooling liner left split body 101, an inner cooling liner right split body 102, an upper split part 111, a lower split part 112, a gas outlet groove 14, a first U-shaped connecting pipe 15, a second U-shaped connecting pipe 16, a water inlet 17, a water outlet 18, a plug 13, a gas circulation pipe 19, an oxygen meter 20, a gas inlet pipe 21, a gas tank 22, a gas diffusion pipe 23, a spiral gas outlet groove 25, a support bracket 26, a base 27, a welding gun 28, a mechanical arm 29, a support beam 30, a strip-shaped assembling groove 31, a beam support frame 32, a support base 33, a pressing frame 35, a pressing fixing frame 36, a support base 38, an arc guiding plate 41 and an arc quenching plate 42.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example 1:
referring to fig. 1 to 12, the present embodiment provides a seam welding protection structure, including: the outer protection component of the welding seam and the inner protection component of the welding seam. The outer protection component of the welding seam is located on the outer side of the cylinder body 1 for the cylinder body 1 in the welding process, and the inner protection component of the welding seam is located on the inner side of the cylinder body 1 for the cylinder body 1 in the welding process, namely, the outer protection component of the welding seam and the inner protection component of the welding seam jointly form a protection effect on the long longitudinal seam 2 of the cylinder body 1 in the welding process.
In detail, first, the weld outer shield assembly includes a pair of outer cooling liners adapted to be abutted against the can 1 on both sides of the longitudinal seam 2 from the outside of the can 1, and a pair of outer cooling pipes 3 fitted inside the pair of outer cooling liners in one-to-one correspondence along the length direction of the outer cooling liners. The outer cooling tube 3 of here specifically is that directly inlay the form in outer cooling liner, form the pipeline that is suitable for the water circulation, the outer cooling liner that deuterogamies here is preferably made with outer cooling tube 3 adopts the copper base material, make outer cooling liner have stronger heat-sinking capability, thereby make to the holistic welding seam outside, not only can take away the heat in longitudinal joint 2 weld zone through the circulation of rivers in outer cooling tube 3, can also dispel the heat to the air through outer cooling tube 3 of copper material and outer cooling liner of copper material, the heat dissipation order is: the heat of welding area is passed through thermal radiation and 1 heat transfer of barrel on the outer cooling liner of copper matter, and the heat part of the outer cooling liner of copper matter is taken away by the air, and the partial outer cooling pipeline 3 that gives the copper matter of transmitting, and the part is in addition by the outer cooling liner of copper matter, progressively to other contact site and material diffusion. And the part of the outer cooling pipeline 3 which is transferred to the copper material is continuously cooled by water flow.
In view of the convenience of the mating between the outer cooling duct 3 and the outer cooling liner, as an example of an alternative embodiment, the outer cooling liner of the present embodiment includes an outer cooling liner left split portion 51 and an outer cooling liner right split portion 52 adapted to be mated by, for example and without limitation, a screw, and the outer cooling liner left split portion 51 and the outer cooling liner right split portion 52 are respectively provided with the arc-shaped recessed ports 4, and the arc-shaped recessed ports 4 respectively located on the outer cooling liner left split portion 51 and the outer cooling liner right split portion 52 are adapted to be spliced to form an accommodating section for accommodating the outer cooling duct 3. That is, the clamping of the circumferential outer side wall of the outer cooling pipe 3 is formed by the left outer cooling liner split body and the right outer cooling liner split body, so that the matching effect of the outer cooling liner and the outer cooling pipe 3 is realized. The significance of design like this lies in to the barrel 1 of different external diameters, in order to guarantee the direct contact effect of outer cooling liner and barrel 1, need change different outer cooling liner, and to the above-mentioned connection structure of outer cooling pipeline 3 and outer cooling liner, make to the outer cooling liner that adapts to different barrels 1 only need prefabricate the same size arc sunken mouth 4 can be suitable for the outer cooling pipeline 3 of same specification, so, to the welding of the longitudinal joint 2 of the barrel 1 of different external diameters, do not need the different outer cooling pipeline 3 of one-to-one configuration, and can adopt the same outer cooling pipeline 3 cooperation different outer cooling liner can, so, can improve outer cooling pipeline 3's utilization ratio, thereby practice thrift use cost.
It should be noted that, in the outer cooling liner of the present embodiment, the curvature of the curved surface of the outer cooling liner contacting the cylindrical body 1 to be welded to the longitudinal seam 2 is the same as the curvature of the outer diameter of the cylindrical body 1, so that the outer cooling liner and the outer wall of the cylindrical body 1 can obtain a large contact surface, and heat transfer and heat dissipation can be facilitated.
The in-weld protection assembly comprises an inner cooling liner adapted to be abutted against the barrel 1 on both sides of the longitudinal joint 2 from the inside of the barrel 1, a notch 9 provided in the cooling liner along the length direction of the inner cooling liner and toward the longitudinal joint 2, a gas pipe 6 penetrating the notch 9, and a pair of inner cooling ducts 7 provided in the inner cooling liner along the length direction of the inner cooling liner and on both sides of the gas pipe 6 in the radial direction. The inner cooling liner and the inner cooling pipe 7 are preferably made of copper-based material for the same reason, and the specific principle is similar to that of the outer cooling liner and the outer cooling pipe 3, and will not be described in detail herein.
It should be noted that, for the internal cooling liner of the present embodiment, an integrated structure may be adopted, and a split structure may also be adopted for the convenience of assembling the air pipe 6 and the internal cooling pipeline 7, and the present embodiment is exemplified by the split structure with reference to the attached drawings. In detail, the inner cooling liner of the present embodiment includes an inner cooling liner left divided body 101 and an inner cooling liner right divided body 102 adapted to clamp the gas pipe 6 from both sides of the gas pipe 6, and the inner cooling liner left divided body 101 and the inner cooling liner right divided body 102 are respectively provided with arc-shaped notches 8, and the arc-shaped notches 8 respectively located on the inner cooling liner left divided body 101 and the inner cooling liner right divided body 102 are adapted to be spliced to form an accommodation section for accommodating the gas pipe 6. That is, the inner cooling liner left split body 101 and the inner cooling liner right split body 102 form a clamp for the circumferential inner side wall of the gas pipe 6, so that the coupling effect of the inner cooling liner and the gas pipe 6 is achieved, and in the process of clamping the gas pipe 6 by the inner cooling liner left split body 101 and the inner cooling liner right split body 102, the notch 9 facing the longitudinal seam 2 of the barrel 1 is formed at the end portions of the inner cooling liner left split body 101 and the inner cooling liner right split body 102 facing the longitudinal seam 2. And, for the pair of internal cooling ducts 7, the internal cooling liner left split body 101 and the internal cooling liner right split body 102 are disposed in one-to-one correspondence, and here, for the mating structure of the internal cooling liner left split body 101 and the internal cooling liner right split body 102 with the internal cooling ducts 7, specifically, for either the internal cooling liner left split body 101 portion or the internal cooling liner right split body 102 portion, the upper split body portion 111 and the lower split body portion 112 adapted to clamp the internal cooling ducts 7 from both upper and lower sides of the internal cooling ducts 7 are included. In this way, the overall internal cooling insert is a four-segment split structure.
It should be further noted that, in the internal cooling liner of the present embodiment, the curvature of the curved surface of the internal cooling liner contacting the cylindrical body 1 to be welded to the longitudinal seam 2 is the same as the curvature of the inner diameter of the cylindrical body 1, so as to form a relatively sealed environment, so as to reduce a large amount of protective gas escaping from the gap between the internal cooling liner and the inner wall of the cylindrical body 1 during the inflation process of the protective gas, improve the inflation efficiency, and reduce the loss of the protective gas.
In order to facilitate the gas flowing through the gas pipe 6 to form a gas protection effect on the longitudinal joint 2 in the welding process, the gas pipe 6 is provided with a gas outlet groove 14 which corresponds to the notch 9 and is suitable for facing the longitudinal joint 2 along the length direction; the slot opening of the outlet slot 14 is here smaller than the slot opening of the slot 9, so that the inner cooling insert does not affect the exhaust of the gas tube 6. In a preferred case, the angle α enclosed by the outlet grooves 14 is larger than the angle β of the break of the longitudinal joint 2, and the structure is such that the break and the weld-near region that sufficiently cover the longitudinal joint 2 are sufficiently protected after the shielding gas overflows from the outlet grooves 14 of the gas pipe 6.
Furthermore, as for the two end portions of the pair of inner cooling pipes 7, one end portion is communicated with the pair of inner cooling pipes 7 through the first U-shaped connecting pipe 15, and the other end portion is communicated with the pair of outer cooling pipes 3 through the second U-shaped connecting pipes 16 in a one-to-one correspondence manner; and the ends of the pair of outer cooling pipes 3 which are not connected with the second U-shaped connecting pipe 16 are respectively connected with an open pipe, wherein one open pipe forms a water inlet 17, and the other open pipe forms a water outlet 18. That is to say, to the internal cooling pipeline 7 and the external cooling pipeline 3 of this embodiment form a water circulation control system together, realized the cooling protection to the outer welding seam and the internal weld seam of barrel 1 simultaneously, the circulation process of specific cooling water is as follows: the water flow passes through the outer cooling pipe 3 → the inner cooling pipe 7 → the outer cooling pipe 3 in this order, and the heat in the weld heat affected zone and the weld is taken away by the water flow (the specific flow direction of the cooling water is specifically indicated by an arrow F in the figure).
The specific implementation principle of the air tube 6 of the present embodiment is as follows:
two ends of the air pipe 6 are respectively filled with a plug 13; for two plugs 13 at two ends of the gas pipe 6, one plug 13 is connected with a gas circulation pipe 19, one end of the gas circulation pipe 19 far away from the plug 13 is connected with an oxygen measuring instrument 20, and the plug 13 has a plugging effect on one end of the gas pipe 6, so that the gas in the gas pipe 6 can only circulate through the gas circulation pipe 19; and the other plug 13 is connected to a gas inlet pipe 21, and the end of the gas inlet pipe 21 remote from the plug 13 is connected to a gas tank 22, where a protective gas such as an inert gas is pre-stored in the gas tank 22, that is, the gas inlet pipe 21 forms an inlet end for the gas pipe 6.
In a preferred embodiment, one end of the plug 13, which is away from the gas inlet pipe 21, of the two plugs 13, to which the gas inlet pipe 21 is connected, is further connected with a gas diffusion pipe 23 which is communicated with the gas inlet pipe 21 through the plug 13; and the circumferential side wall of the gas diffusion pipe 23 is provided with a spiral gas outlet groove 25 penetrating through the side wall. When the protective gas passes through the plug 13 from the gas tank 22 through the gas inlet pipe 21 and enters the gas pipe 6, the gas flow is discharged along the spiral gas outlet groove 25 of the gas diffusion pipe 23, and the air near the plug 13 connected with the gas diffusion pipe 23 in the gas pipe 6 is preferentially expelled, so that the inflation efficiency of the whole gas pipe 6 is improved, and the inflation time is shortened. If the spiral air outlet groove 25 is not provided, and meanwhile, the end part of the air pipe 6 far away from the air inlet pipe 21 is not blocked, the protective gas has certain kinetic energy after entering the air pipe 6, and can flow for a certain distance along the axial direction parallel or nearly parallel to the air pipe 6 and then diffuse, so that a blind area is formed near a plug 13 connected with the air diffusion pipe 23 in the air pipe 6, and the air at the blind area is inconvenient to discharge in time.
It should be noted that the oxygen meter 20 of the present embodiment is provided. When the protective gas flows to the end part of the gas pipe 6 far away from the gas inlet pipe 21 and is discharged from the opening of the end plug 13 positioned at the end part of the gas pipe 6 far away from the gas inlet pipe 21, the oxygen content of the gas in the gas pipe 6 is monitored by the sensor of the oxygen meter 20 and analyzed in real time. When the oxygen meter 20 displays that the oxygen content is reduced to a preset index, the start of welding the longitudinal seam 2 of the cylinder 1 can be indicated.
For the gas protection in the welding process of the longitudinal seam 2 of the cylinder 1 in the embodiment, the whole cylinder 1 is not required to be filled with the protection gas, and only the gas pipe 6 is required to be filled with the protection gas. Specifically, the inner diameter of the cylinder 1 is defined as D, and the length of the cylinder is defined as H; the inner diameter of the air pipe 6 is d, the length of the air pipe is h, the density of the protective gas is rho, and meanwhile, no protective gas escapes in the inflation process, and expansion and contraction are avoided. The actual inflation volume should be: pi d2h/4. The saving ratio relative to the protective gas filling the cylinder 1 is: 1-d2h/D2H. However, in the actual inflation process, gas exchange, protective gas escape and the like are inevitable, and under the same inflation speed, the longer the inflation time is, the lower the efficiency is, the larger the gas consumption is, and the larger the waste is. So the actual gas saving ratio is larger than or far larger than 1-d2h/D2H。
Example 2:
referring to fig. 1 to 12, on the basis of the longitudinal seam 2 welding protection structure of embodiment 1, the present embodiment provides a cylinder longitudinal seam welding device, including: a cylinder supporting mechanism, a longitudinal seam 2 welding mechanism and a longitudinal seam 2 welding protection structure of the embodiment 1. The cylinder supporting mechanism comprises a supporting bracket 26 which is suitable for supporting the cylinder 1 from the bottom of the cylinder 1, and a base 27 fixedly connected with the bottom of the supporting bracket 26; the longitudinal seam 2 welding mechanism comprises a welding gun 28 suitable for welding the longitudinal seam 2 of the barrel 1 and a mechanical arm 29 connected with the welding gun 28 to move the welding gun 28.
In view of the sufficiency of effectively ensuring the contact between the in-seam shielding assembly of the longitudinal seam 2 welding shielding structure and the outer and inner side walls of the can 1, the can 1 longitudinal seam 2 welding apparatus of the present embodiment further includes a supporting beam 30 adapted to support the inner cooling liner of the longitudinal seam 2 welding shielding structure from the inner side of the can 1; the supporting beam is concavely provided with a strip-shaped assembly groove 31 suitable for embedding an internal cooling liner; and a beam support frame 32 is connected to each of both ends in the width direction of the support beam. That is to say, for the inner side of the cylinder 1, the support of the in-weld protection assembly is realized by the support beam through the matching of the internal cooling liner and the strip-shaped assembly groove 31 of the support beam, so that the internal cooling liner of the in-weld protection assembly can be attached to the inner wall of the cylinder 1 to be in full contact, and the in-weld protection assembly is effectively ensured to form a protection effect on the welding of the longitudinal joint 2 of the cylinder 1 from the inner side of the cylinder 1. It should be noted here that, considering that different internal cooling liners need to be configured for barrel bodies 1 of different specifications and sizes, in order to avoid the problem of material waste caused by configuring different supporting cross beams for different internal cooling liners, in this embodiment, it is only necessary to set different internal cooling liners with different curvatures of the contact surfaces with the inner side walls of the barrel body 1, in such a case, for the strip-shaped assembly groove 31, when the strip-shaped assembly groove 31 is coupled with the internal cooling liners, the internal cooling liners may be selected to slightly protrude from the notches of the strip-shaped assembly groove 31, so that the end surfaces of the different internal cooling liners contacting with the inner walls of the barrel body 1 are not affected by the strip-shaped assembly groove 31, and thus, one supporting cross beam can be used in matching with multiple internal cooling liners. It should be noted that, for improving the firmness of the fit between the internal cooling liner and the supporting beam, the screw may be used for matching, and this embodiment is not limited in any way.
It should be noted that, in the present embodiment, the supporting beam and the beam support frame 32 are connected by a detachable connection structure, so that the supporting beam and the beam support frame 32 are easily engaged with each other before and separated from each other after the welding of the cylinder 1 to be welded and the supporting beam. In an optional case, in order to adapt to the adaptability of the cylinders 1 of different specifications, the beam support frame 32 of this embodiment uses a frame body capable of being lifted to fit the inner side walls of the cylinders 1 of different specifications, where "lifted" is, for example, to couple the beam support frame 32 to a ground support fixing seat 33, that is, to adjust the difference in height of the beam support frame 32 relative to the ground by coupling the beam support frame 32 to the ground support fixing seat 33 at different positions, so as to meet the adaptability to the inner side walls of the cylinders 1 of different specifications. Here, in order to facilitate the movement of the beam support frame 32, so as to facilitate the engagement of the cylinder 1 to be welded with the support beam before welding and the separation after welding, a pulley with a self-locking function may be optionally provided at the bottom of the ground support fixing seat 33.
Considering the sufficiency of contact between the outer protective assembly of the welding seam of the longitudinal seam 2 welding protective structure and the outer side wall and the inner side wall of the cylinder 1, the welding device of the longitudinal seam 2 of the cylinder 1 also comprises a pressing frame 35 which is suitable for pressing the outer cooling liner of the longitudinal seam 2 welding protective structure from the outer side of the cylinder 1 to the side end deviating from the cylinder 1; the pressing frame 35 is coupled to the outer cooling pad by pins or screws so that the pressing frame 35 can be used with pressing frames 35 of different sizes.
Because the integral welding seam outer protection component is arranged on the outer side wall of the cylinder body 1, the contact sufficiency between the outer cooling liner and the outer side wall of the cylinder body 1 can be ensured by arranging a certain self-weight pressing frame 35; optionally, two ends of the pressing frame 35 in the width direction are respectively connected with a pressing fixing frame 36, and the specific matching condition between the pressing fixing frame 36 and the pressing frame 35 can refer to the matching condition between the supporting beam 30 and the beam supporting frame 32 in the same way, and it should be noted that, when the pressing fixing frame 36 also needs to be lifted to match the cylinders 1 with different specifications and sizes, the pressing fixing frame 36 can be coupled with a supporting base 38, that is, the height of the pressing fixing frame 36 relative to the ground can be adjusted by coupling the pressing fixing frame 36 and the supporting base 38 at different positions, so as to meet the adaptability to the outer side walls of the cylinders 1 with different specifications and sizes. When the earth supporting seat 38 and the earth supporting fixed seat 33 exist at the same time, the two seat bodies can be arranged oppositely and respectively located at two axial sides of the supporting beam, and the distribution position does not influence the use of the water circulation control system.
Example 3:
on the basis of the longitudinal seam welding device for the cylinder in embodiment 2, the embodiment provides a longitudinal seam welding method for the cylinder, which adopts the longitudinal seam welding device for the cylinder in embodiment 2; the method comprises the following steps:
step S1: after the barrel 1 is manufactured, the long longitudinal seam 2 is pre-connected by spot welding, an arc striking plate 41 with the same thickness as the barrel 1 is welded at one end of the barrel 1, and an arc extinguishing plate 42 with the same thickness as the barrel 1 is welded at the other end of the barrel 1.
Step S2: the cylinder 1 is mounted on the support bracket 26.
Step S3: arranging the outer protection component of the welding seam on the outer side of the cylinder body 1, and arranging the inner protection component of the welding seam on the inner side of the cylinder body 1; the center of a longitudinal welding line of the cylinder body 1 is aligned with the center of the gas pipe 6 of the protective assembly in the welding line, so that the protective gas filled in the gas pipe 6 can form a gas protection effect on the longitudinal welding line in the welding process; the integrity of the contact between the outer and inner cooling liners and the can 1 is ensured by the supporting cross member 30 and the pressing frame 35 in the process.
Step S4: filling inert gas into the gas pipe 6 (namely starting an inflation system), and monitoring the oxygen content in the gas pipe 6 in real time; when the oxygen content in the air pipe 6 is lower than a designated index, a water circulation loop formed by the outer cooling pipeline 3 and the inner cooling pipeline 7 of the longitudinal seam welding protection structure is opened, after water is introduced into the water circulation loop, a welding instruction is started again, the welding gun 28 completes welding along the arc striking plate 41, the longitudinal seam 2 and the arc quenching plate 42 in sequence, water flow and inert gas are continuously introduced into the water circulation loop formed by the outer cooling pipeline 3 and the inner cooling pipeline 7 of the welding protection structure and the air pipe 6 after welding is completed, and the water circulation loop and the inflation system are closed in sequence until a welding seam is cooled to normal temperature.
In conclusion, the welding method for the longitudinal seam of the cylinder body adopts two protection modes of a water cooling protection process and a protective gas protection process for synchronous protection, the outside and the inside of the longitudinal seam of the cylinder body 1 are simultaneously cooled through the water-cooled one-way flow channel, and the gas-saving and efficient gas-filling protection process is realized for gas-filling protection on the inner side of the cylinder body 1.
The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present invention, unless otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (9)
1. A longitudinal seam welding protective structure, comprising:
the welding seam outer protection assembly comprises a pair of outer cooling liners and a pair of outer cooling pipelines, wherein the pair of outer cooling liners are suitable for being attached to the cylinder body on two sides of the longitudinal seam from the outer side of the cylinder body, and the pair of outer cooling pipelines are correspondingly matched and connected in the pair of outer cooling liners along the length direction of the outer cooling liners in a one-to-one mode;
the welding seam internal protection assembly comprises an internal cooling liner, a notch, an air pipe and a pair of internal cooling pipelines, wherein the internal cooling liner is suitable for being attached to the barrel on two sides of the longitudinal joint from the inner side of the barrel, the notch is formed in the internal cooling liner along the length direction of the internal cooling liner and towards the longitudinal joint, the air pipe is communicated with the notch, and the pair of internal cooling pipelines are formed in the internal cooling liner along the length direction of the internal cooling liner and located on two sides of the air pipe in the radial direction;
an air outlet groove which corresponds to the notch groove and is suitable for facing the longitudinal seam is formed in the air pipe along the length direction of the air pipe; and
the included angle alpha of the air outlet grooves is larger than the crevasse angle beta of the longitudinal seam.
2. The longitudinal seam welding protection structure according to claim 1, wherein, for two end portions of each of the pair of inner cooling pipes, one end portion is communicated with the pair of inner cooling pipes through a first U-shaped connecting pipe, and the other end portion is communicated with the pair of outer cooling pipes through a second U-shaped connecting pipe in a one-to-one correspondence manner; and
the ends of the pair of outer cooling pipes which are not connected with the second U-shaped connecting pipe are respectively connected with an opening pipe.
3. The longitudinal seam welding protection structure according to claim 1, wherein a plug is respectively filled at both ends of the air pipe; and
for two plugs at two ends of the air pipe, one plug is connected with a gas circulation pipe, and one end of the gas circulation pipe, which is far away from the plug, is connected with an oxygen meter; and the other plug is connected with a gas inlet pipe, and one end of the gas inlet pipe, which is far away from the plug, is connected with a gas tank.
4. The longitudinal seam welding protective structure according to claim 3, wherein one end of each of the two plugs, which is connected with the gas inlet pipe, is away from the gas inlet pipe, and a gas diffusion pipe communicated with the gas inlet pipe through the corresponding plug is further connected to the end of the corresponding plug; and
and the circumferential side wall of the gas diffusion pipe is provided with a spiral gas outlet groove which penetrates through the side wall.
5. The utility model provides a barrel longitudinal joint welding set which characterized in that includes:
the cylinder supporting mechanism comprises a supporting bracket and a base, wherein the supporting bracket is suitable for supporting the cylinder from the bottom of the cylinder, and the base is fixedly connected with the bottom of the supporting bracket;
the longitudinal seam welding mechanism comprises a welding gun suitable for welding the longitudinal seam of the barrel and a mechanical arm connected with the welding gun to drive the welding gun to move;
the longitudinal seam welding protective structure adopts the longitudinal seam welding protective structure as claimed in any one of claims 1 to 4.
6. The can longitudinal seam welding apparatus of claim 5 further comprising a support beam adapted to support an inner cooling liner of said longitudinal seam weld guard from inside the can;
the supporting beam is concavely provided with a strip-shaped assembly groove suitable for embedding the internal cooling liner; and
two ends of the supporting beam in the width direction are respectively connected with a beam supporting frame.
7. The can longitudinal seam welding device according to any one of claims 5 or 6, further comprising a pressing frame adapted to press against a side end of the outer cooling liner of the longitudinal seam welding guard structure facing away from the can from an outside of the can;
the pressing frame is matched and connected with the outer cooling liner through pins or screws.
8. The welding device for the longitudinal seam of the cylinder body according to claim 7, wherein two ends of the pressing frame in the width direction are respectively connected with a pressing fixing frame.
9. A cylinder longitudinal seam welding method is characterized in that a cylinder longitudinal seam welding device according to any one of claims 5 to 8 is adopted; the method comprises the following steps:
step S1: after the barrel is manufactured, the longitudinal seams of the long strips are pre-connected by spot welding, an arc striking plate with the same thickness as the barrel is welded at one end of the barrel, and an arc extinguishing plate with the same thickness as the barrel is welded at the other end of the barrel;
step S2: erecting the cylinder on a support bracket;
step S3: arranging the outer protection assembly of the welding seam on the outer side of the cylinder body, and arranging the inner protection assembly of the welding seam on the inner side of the cylinder body, so that the center of the longitudinal welding seam is aligned with the center of the air pipe of the inner protection assembly of the welding seam;
step S4: filling inert gas into the gas pipe, and monitoring the oxygen content in the gas pipe in real time; when the oxygen content in the air pipe is lower than a designated index, a water circulation loop formed by an outer cooling pipeline and an inner cooling pipeline of the longitudinal joint welding protection structure is started, after water is introduced into the water circulation loop, a welding instruction is started again, a welding gun completes welding along an arc striking plate, a longitudinal joint and an arc quenching plate in sequence, water flow and inert gas are continuously introduced after the welding is completed, and when the welding line is cooled to the normal temperature, the water circulation loop and the inflation system are closed in sequence.
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| WO2021055976A1 (en) * | 2019-09-20 | 2021-03-25 | Klecher, Llc | Integrated squeezable containers and manufacture thereof |
| CN112222716B (en) * | 2020-09-11 | 2021-11-19 | 中联重科股份有限公司 | Welding pad device and welding pad system |
| CN113275715A (en) * | 2021-05-08 | 2021-08-20 | 渤海造船厂集团有限公司 | Visual, measurable and adjustable back weld forming inflation protection device and method |
| CN113618285B (en) * | 2021-10-12 | 2021-12-28 | 艾美特焊接自动化技术(北京)有限公司 | Lifting type longitudinal seam welding equipment |
| CN114012207A (en) * | 2021-11-11 | 2022-02-08 | 中车青岛四方机车车辆股份有限公司 | Welding auxiliary liner and welding part |
| CN113953706B (en) * | 2021-12-03 | 2022-12-06 | 营口理工学院 | Barrel body forming equipment for vertical barrel-making automatic production line |
| CN116329799B (en) * | 2023-06-01 | 2023-08-08 | 武汉海德龙仪表科技有限公司 | Welding device and method for manufacturing and processing liquid level meter |
| CN117066812B (en) * | 2023-10-17 | 2024-03-05 | 南通日旭重工科技有限公司 | Metal member welding device and welding process |
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