CN114749814B - Butt joint tool and butt joint welding method for low-temperature liquid tank container cylinder - Google Patents
Butt joint tool and butt joint welding method for low-temperature liquid tank container cylinder Download PDFInfo
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- CN114749814B CN114749814B CN202210262612.2A CN202210262612A CN114749814B CN 114749814 B CN114749814 B CN 114749814B CN 202210262612 A CN202210262612 A CN 202210262612A CN 114749814 B CN114749814 B CN 114749814B
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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
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
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- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
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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
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Abstract
The invention discloses a butt joint tool and a butt joint welding method for a cylinder body of a low-temperature liquid tank container. The butt joint tool comprises a cylinder body positioning device and a cylinder opening coaxial butt joint device, wherein the cylinder body positioning device comprises a base and a pair of cylinder body supporting and rotating assemblies arranged at the left side and the right side of the upper part of the base; the cylinder mouth coaxial docking device comprises a height-adjustable supporting seat fixedly arranged on the base and positioned right below the cylinder body docking position, a rigid annular ring supported on the height-adjustable supporting seat, and a diameter section difference automatic compensation centralizer arranged on the rigid annular ring; the diameter section difference automatic compensation centralizer comprises a middle annular groove arranged on the middle outer circle of the rigid annular ring, a pair of annular section difference compensation grooves arranged on the outer circle of the rigid annular ring and positioned on two sides of the middle annular groove, and a pair of annular rubber elastic tires correspondingly arranged in the pair of annular section difference compensation grooves. The invention improves the efficiency of the assembly butt joint operation and the butt joint welding quality of the cylinder.
Description
Technical Field
The invention relates to the technical field of manufacturing of low-temperature liquid tank containers, in particular to a low-temperature liquid tank container cylinder butt-joint tool and a butt-joint welding method.
Background
A cryogenic liquid tank container is a mobile pressure vessel with a support frame on the outside for shipping cryogenic liquid. The core components of the low-temperature liquid tank container are an inner container and an outer container, an interlayer space is formed between the inner container and the outer container, and the heat preservation and insulation performance of the container is ensured by vacuumizing the interlayer space. The inner container and the outer container on the low-temperature liquid tank container are welded structural members, and are composed of a cylinder body and sealing heads connected to two ends of the cylinder body. Wherein, the cylinder is formed by rolling a steel plate on a plate rolling machine and then welding; when the cylinder is longer, the cylinder needs to be divided into a plurality of sections of sub-cylinders to be spliced and assembled and welded into a whole cylinder.
The cylinder body on the low-temperature liquid tank container in the prior art has the following problems in manufacturing:
Firstly, because of reasons such as steel plate coiling error and welding deformation, the sub-cylinder body of barrel can inevitably have certain diameter error and roundness error after making, and this kind of diameter error and roundness error of sub-cylinder body has formed the section difference that the barrel was docked, and the existence of section difference has increased the centering degree of difficulty that sub-cylinder body was docked, often need have good axiality when adjusting and repeated measurement just can guaranteeing sub-cylinder body butt joint through many times, has reduced the efficiency of manufacturing from this.
Secondly, the welding quality of the sub-cylinder body after butt joint can be influenced by the environmental temperature, and particularly in severe cold winter, the circumferential weld at the butt joint position of the sub-cylinder body is easy to generate welding quality defects due to higher cooling speed due to low ambient temperature around the production site.
Thirdly, when the sub-cylinder is welded in a butt joint mode, if a welding operation method is improper, cylinder deformation is easy to occur, and the welding operation method comprises the following steps of out-of-round after welding of the cylinder and large cylinder straight line error, so that the overall quality of the cylinder is affected.
Disclosure of Invention
In order to solve the problems, the invention provides a low-temperature liquid tank container barrel butt joint tool, which aims to improve the efficiency of barrel assembly butt joint operation and improve the quality of barrel butt joint welding. The specific technical scheme is as follows:
the barrel butt joint tooling for the low-temperature liquid tank container comprises a barrel positioning device and a barrel opening coaxial butt joint device, wherein the barrel positioning device comprises a base and a pair of barrel support rotating assemblies arranged at the left side and the right side of the upper part of the base, each barrel support rotating assembly comprises a pair of bearing seats respectively fixed at the front and rear positions of the upper part of the base, and a shaft roller rotatably arranged on the pair of bearing seats; the cylinder mouth coaxial docking device comprises a height-adjustable supporting seat fixedly arranged on the base and positioned right below the cylinder body docking position, a rigid annular ring supported on the height-adjustable supporting seat, and a diameter section difference automatic compensation centralizer arranged on the rigid annular ring; the diameter section difference automatic compensation centralizer comprises a middle annular groove arranged on the middle outer circle of the rigid annular ring, a pair of annular section difference compensation grooves arranged on the outer circle of the rigid annular ring and positioned on two sides of the middle annular groove, and a pair of annular rubber elastic tires correspondingly arranged in the pair of annular section difference compensation grooves, wherein air inlet joints of the pair of annular rubber elastic tires are connected to the same air inlet pipe; the bottom of the middle annular groove of the rigid annular ring is also provided with a circle of positioning cutting groove, the height-adjustable supporting seat comprises an electric push rod which is upwards erected on the base and a positioning inserting sheet which is arranged at the top of a telescopic rod of the electric push rod, and the positioning inserting sheet at the top of the telescopic rod of the electric push rod is supported in the positioning cutting groove of the rigid annular ring.
Preferably, the lower extreme of location inserted sheet is connected with a pair of guide bar, a pair of guide bar divides to be arranged in the both sides of electric putter telescopic link, be provided with the guiding hole on the base, the guide bar reciprocates and sets up on the guiding hole.
In the invention, the air inlet pipe is connected to a compressed air source through a first air pipeline; the outer circle of the shaft roller is provided with a flexible supporting component, the flexible supporting component comprises a plurality of sliding sleeves sleeved on the outer circle of the shaft roller, and annular rubber air rings arranged on the outer circle of the sliding sleeves, each annular rubber air ring is connected to a compressed air source through a second pneumatic pipeline, and air pressure adjusting devices are arranged on the first pneumatic pipeline and the second pneumatic pipeline respectively.
In the invention, the air pressure regulating device comprises an electric air inlet regulating valve, an electric air outlet regulating valve and a pressure sensor which are arranged on the air pipeline, wherein the electric air inlet regulating valve, the electric air outlet regulating valve and the pressure sensor are respectively connected with a PLC control system.
Preferably, the number of the flexible supporting components on each shaft roller is four, so that each cylinder to be butted is respectively provided with two groups of supporting positions on each shaft roller.
As a further improvement of the invention, the shaft roller is arranged above the base in an overhead manner through the bearing seat, a welding deformation monitoring device is arranged below the shaft roller on the base, the welding deformation monitoring device comprises a pair of transverse reference bars which are arranged on the base and are perpendicular to the central axis of the cylinder body, an infrared ranging sensor array which is arranged on the transverse reference bars, and the pair of transverse reference bars are respectively arranged at the front side and the rear side below the butt joint part of the pair of cylinder bodies on the base; the infrared ranging sensor array comprises a plurality of infrared ranging sensors which are arranged at intervals along the length direction of the transverse reference ruler and are arranged vertically upwards, and the infrared ranging sensor array is connected with the PLC control system.
As a still further improvement of the present invention, the welding deformation monitoring apparatus further includes a pair of longitudinal reference bars provided on the base, the pair of longitudinal reference bars being correspondingly provided below the pair of cylinder bodies and being parallel to central axes of the pair of cylinder bodies; the infrared distance measuring device is characterized in that an infrared distance measuring sensor array is arranged on the longitudinal reference ruler and comprises a plurality of infrared distance measuring sensors which are arranged at intervals along the length direction of the longitudinal reference ruler and are arranged vertically upwards, and the infrared distance measuring sensor array is connected with a PLC control system.
Preferably, the method is used. The surface of the middle annular groove of the rigid annular ring is provided with a layer of heat insulation coating, the surface of the heat insulation coating is provided with a layer of aluminum reflecting film, and electric tracing bands for preheating or heat preservation of the butt joint part of the cylinder are respectively and circumferentially arranged in the middle annular groove and positioned at the two sides of the positioning cutting groove.
In the invention, the sliding sleeve is fixed with the shaft roller through a set screw; the outer surface of the electric tracing band is also provided with a refractory coating; the base is provided with a speed reduction transmission mechanism, one of the shaft rollers on the pair of bearings is a driving shaft roller, the other shaft roller is a driven driving shaft roller, and the speed reduction transmission mechanism is in transmission connection with the driving shaft roller.
In the invention, the speed reduction transmission mechanism preferably adopts a worm and gear speed reducer driven by a servo motor, and the shaft roller is driven to rotate through gear transmission.
The butt welding method of the butt welding tool for the low-temperature liquid tank container cylinder is characterized by comprising the following steps of:
(1) Adjustment of the barrel positioning device: according to the length specification and the size of a pair of cylinders to be butted, the positions of the flexible supporting components on the outer circle of the shaft roller are adjusted, so that the flexible supporting components can be adjusted to a proper position capable of stably supporting the pair of cylinders;
(2) Mounting of the cylinder port coaxial docking device: hoisting a rigid annular ring with a diameter section difference automatic compensation centralizer onto a height-adjustable supporting seat, so that a positioning inserting piece at the top of an electric push rod telescopic rod is supported in a positioning cutting groove of the rigid annular ring; adjusting the air pressure in the annular rubber elastic tire to a lower state so that the outer diameter size of the annular rubber elastic tire is smaller than the inner diameter size of the cylinder;
(3) Hoisting the barrel: respectively hoisting a pair of cylinders on a shaft roller of a cylinder supporting rotating assembly; during hoisting, the rigid annular ring is avoided, so that a pair of cylinders are respectively arranged at the front side and the rear side of the rigid annular ring;
(4) Adjusting the coaxial butt joint device of the cylinder opening: the height of the rigid annular ring supported on the positioning inserting sheet at the top of the telescopic rod of the electric push rod is adjusted through the electric push rod, so that the rigid annular ring is coaxial with the pair of cylinders;
(5) Butt joint of the cylinder: moving the pair of cylinders respectively so that the pair of cylinders are respectively sleeved and positioned on the outer circle of the rigid annular ring; after positioning, checking the relative positions of longitudinal welding seams on a pair of cylinders, and rotating the cylinders to enable the longitudinal welding seams on the pair of cylinders to be staggered for a certain angle in the circumferential direction; after the angle is adjusted in place, the telescopic rod of the electric push rod is operated to move downwards, so that the positioning inserting piece at the top of the telescopic rod of the electric push rod moves downwards and is completely separated from the rigid annular ring and is positioned below the cylinder, and then the telescopic rod continuously moves respectively, so that a pair of cylinders are finally abutted against each other; after the butt joint of the cylinder body is finished, fixing a sliding sleeve on the outer circle of the shaft roller by using a set screw;
(6) And (3) coaxial quick correction of the cylinder: adjusting the air pressure in the annular rubber elastic tire on the rigid annular ring to a higher state, so that the outer circles of the pair of annular rubber elastic tires respectively prop against the inner walls of the pair of cylinders due to expansion, and realizing automatic centering when the inner diameters of the pair of cylinders have step differences; the corrected cylinder is positioned and fixed at the butt joint position by spot welding;
(7) And (3) adapting and adjusting the cylinder body positioning device: the pressure sensor detects the pressure in the annular rubber air ring on the outer circle of each sliding sleeve, and when the pressure is uneven, the pressure in each annular rubber air ring is regulated by the air pressure regulating device, so that the pressure in each annular rubber air ring is equal, the stable and balanced support of a pair of cylinders is realized, and the stress deformation is reduced;
(8) And (3) girth welding: starting a speed reduction transmission mechanism to enable the shaft roller to drive the cylinder to rotate, and performing butt welding of a pair of cylinder girth welds by using a welding machine;
(9) Heat preservation after welding: and after the welding is finished, wrapping a heat insulation material at the outer circle part of the cylinder circumferential weld, and simultaneously opening an electric tracing band positioned in the middle annular groove of the rigid annular ring to insulate the cylinder circumferential weld.
Preferably, after the butt joint of the cylinders and before the welding of the cylinders, an electric heat tracing band positioned in the middle annular groove of the rigid annular ring is opened to preheat the butt joint part of the cylinders (the heat insulation material can be wrapped at the excircle part of the butt joint part of the cylinders at the same time).
Preferably, in the girth welding in the step (8), deformation conditions of a pair of cylinders are detected respectively through a pair of transverse reference bars and a pair of infrared ranging sensor arrays on longitudinal references, which are respectively arranged below the cylinders, wherein the deformation conditions comprise a out-of-round condition of the cylinders and a relative deformation condition between the cylinders, and when out-of-tolerance, a PLC control system gives an alarm to remind an operator to take corrective measures in time.
Preferably, in the post-welding heat preservation process of the step (9), a speed reduction transmission mechanism is started to drive the shaft roller to rotate so that the barrel enters a rotary heat preservation mode, and therefore post-welding deformation caused by self gravity of the barrel is eliminated or reduced; under the rotary heat preservation mode of the cylinder, the PLC control system dynamically controls the gas pressure in the annular rubber balloon on each flexible supporting component through the gas pressure adjusting device, so that the pressure in each annular rubber balloon is equal, stable and balanced support for the cylinder is formed, stress deformation is reduced, and postweld deformation of the cylinder is reduced to the greatest extent.
The beneficial effects of the invention are as follows:
Firstly, the low-temperature liquid tank container barrel butt joint tool is provided with the barrel opening coaxial butt joint device, and the diameter section difference automatic compensation centralizer specially designed on the barrel opening coaxial butt joint device utilizes the air pressure balancing principle of the double-ring rubber elastic tire to realize good centering when the sub-barrels are in butt joint, so that the defects of repeated adjustment and repeated measurement caused by diameter errors and roundness errors in the sub-barrel centering are overcome to the greatest extent, and the efficiency of assembly butt joint operation is improved.
Secondly, the welding deformation monitoring device is arranged on the low-temperature liquid tank container barrel butt joint tool, and the welding deformation monitoring device is used for respectively monitoring the deformation condition of the barrel in the welding process from the left-right direction (mainly responsible for monitoring the roundness error of the barrel) and the front-back direction (mainly responsible for monitoring the straight line error of the barrel) by using the infrared ranging sensor array arranged on the base, so that an alarm can be sent out when the welding deformation monitoring device is out of tolerance, and an operator is reminded to take treatment measures in time.
Third, according to the low-temperature liquid tank container barrel butt joint tool disclosed by the invention, the pair of electric tracing bands are arranged at the two sides of the middle annular groove of the rigid annular ring of the barrel opening coaxial butt joint device, the barrel butt joint part can be preheated before welding, and the welding seam can be insulated after welding, so that the welding defect caused by low environmental temperature is effectively prevented, and the quality of ring welding is further improved.
Fourth, the special design of the electric tracing band mounting structure of the low-temperature liquid tank container barrel butt joint tool can concentrate heat on the butt joint part of the barrel, so that the heat of the butt joint part is uniformly distributed along the circumferential direction, the loss of heat energy can be reduced to the greatest extent, and the electric tracing band mounting structure has good energy-saving effects in preheating and heat preservation.
Drawings
FIG. 1 is a schematic structural view of a low temperature liquid tank container barrel docking tool of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of a construction in which a flexible support assembly is provided on the axle roll of FIG. 1;
Fig. 4 is a partially enlarged view of fig. 2.
In the figure: 1. the cylinder body positioning device comprises a cylinder body positioning device 2, a cylinder opening coaxial docking device, a cylinder body supporting rotating assembly 3, a base 4, a cylinder body supporting rotating assembly 5, a bearing seat 6, a shaft roller 7, a height adjustable supporting seat 8, a rigid annular ring 9, a diameter section difference automatic compensation centering device 10, an intermediate annular groove 11, an annular rubber elastic tire 12, an air inlet joint 13, an air inlet pipe 14, a positioning cutting groove 15, a guide rod 16, an electric push rod 17, a positioning inserting piece 18, a first pneumatic pipeline 19, a compressed air source 20, a flexible supporting assembly 21, a sliding sleeve 22, an annular rubber air ring 23, a second pneumatic pipeline 24, an air pressure adjusting device 25, an electric air inlet and outlet adjusting valve 26, an electric air pressure adjusting valve 27, a pressure sensor 28, a welding deformation monitoring device 29, a transverse basic ruler 30, an infrared ranging sensor 31, a longitudinal basic ruler 32, an electric tracing belt 33, a set screw 34 and a speed reducing transmission mechanism.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Example 1:
Referring to fig. 1 to 4, an embodiment of a low-temperature liquid tank container barrel docking tool according to the present invention includes a barrel positioning device 1 and a barrel port coaxial docking device 2, where the barrel positioning device 1 includes a base 3, a pair of barrel support rotating assemblies 4 disposed at left and right sides of an upper portion of the base 3, each of the barrel support rotating assemblies 4 includes a pair of bearing blocks 5 respectively fixed at front and rear positions of the upper portion of the base 3, and a shaft roller 6 rotatably disposed on the pair of bearing blocks 5; the cylinder mouth coaxial docking device 2 comprises a height-adjustable supporting seat 7 fixedly arranged on the base 3 and positioned right below the cylinder body docking position, a rigid annular ring 8 supported on the height-adjustable supporting seat 7, and a diameter section difference automatic compensation centering device 9 arranged on the rigid annular ring 8; the diameter step automatic compensation centralizer 9 comprises a middle annular groove 10 arranged on the outer circle of the middle of the rigid annular ring 8, a pair of annular step compensation grooves arranged on the outer circle of the rigid annular ring 8 and positioned at two sides of the middle annular groove 10, and a pair of annular rubber elastic tires 11 correspondingly arranged in the pair of annular step compensation grooves, wherein air inlet joints 12 of the pair of annular rubber elastic tires 11 are connected to the same air inlet pipe 13; the bottom of the middle annular groove 10 of the rigid annular ring 8 is also provided with a circle of positioning cutting groove 14, the height-adjustable supporting seat 7 comprises an electric push rod 16 erected on the base 3 upwards and a positioning inserting piece 17 arranged at the top of a telescopic rod of the electric push rod 16, and the positioning inserting piece 17 at the top of the telescopic rod of the electric push rod 16 is supported in the positioning cutting groove 14 of the rigid annular ring 8.
Preferably, the lower end of the positioning insert 17 is connected with a pair of guide rods 15, the pair of guide rods 15 are respectively arranged at two sides of the telescopic rod of the electric push rod 16, a guide hole is formed in the base 3, and the guide rods 15 are arranged on the guide hole in a vertically moving manner.
In this embodiment, the inlet pipe 13 is connected to a compressed air source 19 via a first air line 18; the outer circle of the shaft roller 6 is provided with a flexible supporting component 20, the flexible supporting component 20 comprises a plurality of sliding sleeves 21 sleeved on the outer circle of the shaft roller 6, annular rubber air rings 22 arranged on the outer circle of the sliding sleeves 21, each annular rubber air ring 22 is connected to a compressed air source 19 through a second pneumatic pipeline 23, and air pressure adjusting devices 24 are arranged on the first pneumatic pipeline 18 and the second pneumatic pipeline 23 respectively.
In this embodiment, the air pressure adjusting device 24 includes an electric air inlet adjusting valve 25, an electric air outlet adjusting valve 26 and a pressure sensor 27 disposed on the pneumatic pipes 18 and 23, and the electric air inlet adjusting valve 25, the electric air outlet adjusting valve 26 and the pressure sensor 27 are respectively connected with a PLC control system.
Preferably, the number of the flexible supporting components 20 on each shaft roller 6 is four, so that each cylinder to be docked respectively obtains two groups of supporting positions on each shaft roller.
As a further improvement of the embodiment, the shaft roller 6 is arranged above the base 3 in an overhead manner through the bearing seat 5, a welding deformation monitoring device 28 is further arranged below the shaft roller 6 on the base 3, the welding deformation monitoring device 28 comprises a pair of transverse reference bars 29 arranged on the base 3 and perpendicular to the central axis of the cylinder body, an infrared ranging sensor array arranged on the transverse reference bars 29, and the pair of transverse reference bars 29 are arranged at the front side and the rear side below the butt joint part of the pair of cylinder bodies on the base 3; the infrared ranging sensor array comprises a plurality of infrared ranging sensors 30 which are arranged at intervals along the length direction of the transverse reference ruler 29 and are arranged vertically upwards, and the infrared ranging sensor array is connected with a PLC control system.
As a still further improvement of the present embodiment, the welding deformation monitoring apparatus 28 further includes a pair of longitudinal reference bars 31 provided on the base 3, the pair of longitudinal reference bars 31 being correspondingly provided below and parallel to the central axes of the pair of cylinders; the infrared ranging sensor array is arranged on the longitudinal reference ruler, the infrared ranging sensor array comprises a plurality of infrared ranging sensors 30 which are arranged at intervals along the length direction of the longitudinal reference ruler 31 and are arranged vertically upwards, and the infrared ranging sensor array is connected with the PLC control system.
Preferably, the method is used. The surface of the middle annular groove 10 of the rigid annular ring 8 is provided with a layer of heat insulation paint layer, the surface of the heat insulation paint layer is provided with a layer of aluminum reflecting film, and electric tracing bands 32 for preheating or heat preservation of the barrel butt joint part are respectively arranged in the middle annular groove 10 and positioned at two sides of the positioning cutting groove 14 in a surrounding mode.
In this embodiment, the sliding sleeve 21 is fixed to the shaft roller 6 by a set screw 33; the outer surface of the electric tracing band 32 is also provided with a refractory coating; the base is provided with a reduction transmission mechanism 34, one of the shaft rollers 6 on the pair of bearings 5 is a driving shaft roller, the other shaft roller 6 is a driven driving shaft roller, and the reduction transmission mechanism 34 is in transmission connection with the driving shaft roller.
In this embodiment, the reduction gear mechanism 34 is preferably a worm gear reducer driven by a servo motor, and the shaft roller 6 is driven to rotate by a gear transmission.
Example 2:
A butt welding method adopting the butt welding tool for the low-temperature liquid tank container barrel of the embodiment 1 comprises the following steps:
(1) Adjustment of the barrel positioning device: according to the length specification and the size of a pair of cylinders to be butted, the positions of the flexible supporting assemblies 20 on the outer circle of the shaft roller 6 are adjusted, so that the flexible supporting assemblies 20 are adjusted to a proper position capable of stably supporting the pair of cylinders;
(2) Mounting of the cylinder port coaxial docking device: hoisting the rigid annular ring 8 with the diameter section difference automatic compensation centralizer 9 onto the height-adjustable supporting seat 7, so that the positioning inserting piece 17 at the top of the telescopic rod of the electric push rod 16 is supported in the positioning cutting groove 16 of the rigid annular ring 8; adjusting the air pressure in the annular rubber elastic tyre 11 to a lower state so that the outer diameter size of the annular rubber elastic tyre 11 is smaller than the inner diameter size of the cylinder;
(3) Hoisting the barrel: a pair of cylinders are respectively hoisted to the shaft rollers 6 of the cylinder supporting and rotating assembly 4; during hoisting, the rigid annular ring 8 is avoided, so that a pair of cylinders are respectively arranged at the front side and the rear side of the rigid annular ring 8;
(4) Adjusting the coaxial butt joint device of the cylinder opening: the height of the rigid annular ring 8 supported on the positioning inserting sheet 17 at the top of the telescopic rod of the electric push rod 16 is adjusted through the electric push rod 16, so that the rigid annular ring 8 is coaxial with the pair of cylinders;
(5) Butt joint of the cylinder: moving the pair of cylinders respectively so that the pair of cylinders are respectively sleeved and positioned on the outer circle of the rigid annular ring 8; after positioning, checking the relative positions of longitudinal welding seams on a pair of cylinders, and rotating the cylinders to enable the longitudinal welding seams on the pair of cylinders to be staggered for a certain angle in the circumferential direction; after the angle is adjusted in place, the telescopic rod of the electric push rod 16 is operated to move downwards, so that the positioning inserting sheet 17 at the top of the telescopic rod of the electric push rod 16 moves downwards and is completely separated from the rigid annular ring 8 and is positioned below the cylinders, and then the cylinders continue to move respectively, so that the cylinders are finally abutted against one another; after the butt joint of the cylinder body is finished, the sliding sleeve 21 on the outer circle of the shaft roller 6 is fixed by using the set screw 33;
(6) And (3) coaxial quick correction of the cylinder: the air pressure in the annular rubber elastic tyre 11 on the rigid annular ring 8 is regulated to be in a higher state, so that the outer circles of the pair of annular rubber elastic tyres 11 respectively prop against the inner walls of the pair of cylinders due to expansion, and the automatic centering when the step difference exists between the inner diameters of the pair of cylinders is realized; the corrected cylinder is positioned and fixed at the butt joint position by spot welding;
(7) And (3) adapting and adjusting the cylinder body positioning device: the pressure sensor 27 detects the pressure in the annular rubber air ring 22 on the outer circle of each sliding sleeve 21, and when the pressure is uneven, the pressure in each annular rubber air ring is regulated by the air pressure regulating device, so that the pressure in each annular rubber air ring is equal, the stable and balanced support of a pair of cylinders is realized, and the stress deformation is reduced;
(8) And (3) girth welding: starting a speed reduction transmission mechanism 34 to enable the shaft roller to drive the cylinder to rotate, and performing butt welding of a pair of cylinder girth welds by using a welding machine;
(9) Heat preservation after welding: after the welding is finished, the heat-insulating material is wrapped on the outer circle part of the cylinder circumferential weld, and meanwhile, an electric heat tracing band 32 positioned in the middle annular groove 10 of the rigid annular ring 8 is opened to insulate the cylinder circumferential weld.
Preferably, after the butt joint of the cylinders and before the welding of the cylinders, the electric tracing band 32 positioned in the middle annular groove 10 of the rigid annular ring 8 is opened to preheat the butt joint part of the cylinders (the heat insulation material can be wrapped at the outer circle part of the butt joint part of the cylinders at the same time).
Preferably, in the girth welding in the step (8), the deformation condition of the pair of cylinders is detected by the pair of transverse reference bars 29 and the pair of infrared ranging sensor arrays on the longitudinal reference bars 31 respectively arranged below the cylinders, the deformation condition comprises the out-of-round condition of the cylinders and the relative deformation condition between the pair of cylinders, and the PLC control system gives an alarm when the error occurs to remind an operator to take corrective measures in time.
Preferably, in the post-welding heat preservation process of the step (9), the speed reduction transmission mechanism 34 is started to drive the shaft roller 6 to drive the cylinder to rotate, so that the cylinder enters a rotary heat preservation mode, and the post-welding deformation caused by the gravity of the cylinder is eliminated or reduced; in the cylinder rotation heat preservation mode, the PLC control system dynamically controls the gas pressure in the annular rubber air rings 22 on each flexible support assembly 20 through the gas pressure adjusting device 24, so that the pressure in each annular rubber air ring 22 is equal, stable and balanced support for the cylinder is formed, stress deformation is reduced, and post-welding deformation of the cylinder is reduced to the greatest extent.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (10)
1. The low-temperature liquid tank container barrel butt joint tool is characterized by comprising a barrel positioning device and a barrel opening coaxial butt joint device, wherein the barrel positioning device comprises a base and a pair of barrel supporting and rotating assemblies arranged at the left side and the right side of the upper part of the base, each barrel supporting and rotating assembly comprises a pair of bearing rollers respectively fixed at the front and rear positions of the upper part of the base, and the bearing rollers are rotatably arranged on the pair of bearings; the cylinder mouth coaxial docking device comprises a height-adjustable supporting seat fixedly arranged on the base and positioned right below the cylinder body docking position, a rigid annular ring supported on the height-adjustable supporting seat, and a diameter section difference automatic compensation centralizer arranged on the rigid annular ring; the diameter section difference automatic compensation centralizer comprises a middle annular groove arranged on the middle outer circle of the rigid annular ring, a pair of annular section difference compensation grooves arranged on the outer circle of the rigid annular ring and positioned on two sides of the middle annular groove, and a pair of annular rubber elastic tires correspondingly arranged in the pair of annular section difference compensation grooves, wherein air inlet joints of the pair of annular rubber elastic tires are connected to the same air inlet pipe; the bottom of the middle annular groove of the rigid annular ring is also provided with a circle of positioning cutting groove, the height-adjustable supporting seat comprises an electric push rod which is upwards erected on the base and a positioning inserting sheet which is arranged at the top of a telescopic rod of the electric push rod, and the positioning inserting sheet at the top of the telescopic rod of the electric push rod is supported in the positioning cutting groove of the rigid annular ring.
2. The cryogenic liquid tank container bowl docking tool of claim 1 wherein the air inlet conduit is connected to a compressed air source through a first air line; the outer circle of the shaft roller is provided with a flexible supporting component, the flexible supporting component comprises a plurality of sliding sleeves sleeved on the outer circle of the shaft roller, and annular rubber air rings arranged on the outer circle of the sliding sleeves, each annular rubber air ring is connected to a compressed air source through a second pneumatic pipeline, and air pressure adjusting devices are arranged on the first pneumatic pipeline and the second pneumatic pipeline respectively.
3. The low-temperature liquid tank container barrel butt joint tool according to claim 2, wherein the air pressure adjusting device comprises an electric air inlet adjusting valve, an electric air outlet adjusting valve and a pressure sensor which are arranged on the air pipeline, and the electric air inlet adjusting valve, the electric air outlet adjusting valve and the pressure sensor are respectively connected with a PLC control system.
4. The cryogenic liquid tank container bowl docking tool of claim 2 wherein the number of flexible support assemblies on each roller is four.
5. The low-temperature liquid tank container barrel butt joint tool according to claim 1, wherein the shaft roller is arranged above the base in an overhead manner through the bearing seat, a welding deformation monitoring device is further arranged below the shaft roller on the base, the welding deformation monitoring device comprises a pair of transverse reference bars arranged on the base and perpendicular to the central axis of the barrel, an infrared ranging sensor array arranged on the transverse reference bars, and the pair of transverse reference bars are respectively arranged at front and rear side positions below the butt joint parts of the pair of barrels on the base; the infrared ranging sensor array comprises a plurality of infrared ranging sensors which are arranged at intervals along the length direction of the transverse reference ruler and are arranged vertically upwards, and the infrared ranging sensor array is connected with the PLC control system.
6. The cryogenic liquid tank container barrel docking tool of claim 5, wherein the welding deformation monitoring device further comprises a pair of longitudinal reference bars arranged on the base, the pair of longitudinal reference bars being correspondingly arranged below the pair of barrels and being parallel to central axes of the pair of barrels; the infrared distance measuring device is characterized in that an infrared distance measuring sensor array is arranged on the longitudinal reference ruler and comprises a plurality of infrared distance measuring sensors which are arranged at intervals along the length direction of the longitudinal reference ruler and are arranged vertically upwards, and the infrared distance measuring sensor array is connected with a PLC control system.
7. The low-temperature liquid tank container barrel butt joint tool according to claim 2, wherein a layer of heat insulation paint layer is arranged on the surface of the middle annular groove of the rigid annular ring, an aluminum reflection film is arranged on the surface of the heat insulation paint layer, and electric heat tracing bands for preheating or heat preservation of the barrel butt joint part are respectively arranged in the middle annular groove and positioned at two sides of the positioning cutting groove in a surrounding mode.
8. The cryogenic liquid tank container cylinder docking tool of claim 7, wherein the sliding sleeve is fixed with the shaft roller by a set screw; the outer surface of the electric tracing band is also provided with a refractory coating; the base is provided with a speed reduction transmission mechanism, one of the shaft rollers on the pair of bearings is a driving shaft roller, the other shaft roller is a driven driving shaft roller, and the speed reduction transmission mechanism is in transmission connection with the driving shaft roller.
9. A butt welding method using the low-temperature liquid tank container barrel butt welding tool as claimed in any one of claims 1 to 8, comprising the steps of:
(1) Adjustment of the barrel positioning device: according to the length specification and the size of a pair of cylinders to be butted, the positions of the flexible supporting components on the outer circle of the shaft roller are adjusted, so that the flexible supporting components can be adjusted to a proper position capable of stably supporting the pair of cylinders;
(2) Mounting of the cylinder port coaxial docking device: hoisting a rigid annular ring with a diameter section difference automatic compensation centralizer onto a height-adjustable supporting seat, so that a positioning inserting piece at the top of an electric push rod telescopic rod is supported in a positioning cutting groove of the rigid annular ring; adjusting the air pressure in the annular rubber elastic tire to a lower state so that the outer diameter size of the annular rubber elastic tire is smaller than the inner diameter size of the cylinder;
(3) Hoisting the barrel: respectively hoisting a pair of cylinders on a shaft roller of a cylinder supporting rotating assembly; during hoisting, the rigid annular ring is avoided, so that a pair of cylinders are respectively arranged at the front side and the rear side of the rigid annular ring;
(4) Adjusting the coaxial butt joint device of the cylinder opening: the height of the rigid annular ring supported on the positioning inserting sheet at the top of the telescopic rod of the electric push rod is adjusted through the electric push rod, so that the rigid annular ring is coaxial with the pair of cylinders;
(5) Butt joint of the cylinder: moving the pair of cylinders respectively so that the pair of cylinders are respectively sleeved and positioned on the outer circle of the rigid annular ring; after positioning, checking the relative positions of longitudinal welding seams on a pair of cylinders, and rotating the cylinders to enable the longitudinal welding seams on the pair of cylinders to be staggered for a certain angle in the circumferential direction; after the angle is adjusted in place, the telescopic rod of the electric push rod is operated to move downwards, so that the positioning inserting piece at the top of the telescopic rod of the electric push rod moves downwards and is completely separated from the rigid annular ring and is positioned below the cylinder, and then the telescopic rod continuously moves respectively, so that a pair of cylinders are finally abutted against each other; after the butt joint of the cylinder body is finished, fixing a sliding sleeve on the outer circle of the shaft roller by using a set screw;
(6) And (3) coaxial quick correction of the cylinder: adjusting the air pressure in the annular rubber elastic tire on the rigid annular ring to a higher state, so that the outer circles of the pair of annular rubber elastic tires respectively prop against the inner walls of the pair of cylinders due to expansion, and realizing automatic centering when the inner diameters of the pair of cylinders have step differences; the corrected cylinder is positioned and fixed at the butt joint position by spot welding;
(7) And (3) adapting and adjusting the cylinder body positioning device: the pressure sensor detects the pressure in the annular rubber air ring on the outer circle of each sliding sleeve, and when the pressure is uneven, the pressure in each annular rubber air ring is regulated by the air pressure regulating device, so that the pressure in each annular rubber air ring is equal, the stable and balanced support of a pair of cylinders is realized, and the stress deformation is reduced;
(8) And (3) girth welding: starting a speed reduction transmission mechanism to enable the shaft roller to drive the cylinder to rotate, and performing butt welding of a pair of cylinder girth welds by using a welding machine;
(9) Heat preservation after welding: and after the welding is finished, wrapping a heat insulation material at the outer circle part of the cylinder circumferential weld, and simultaneously opening an electric tracing band positioned in the middle annular groove of the rigid annular ring to insulate the cylinder circumferential weld.
10. The butt welding method of the butt welding tool for the low-temperature liquid tank container barrels according to claim 9, wherein in the circumferential seam welding of the step (8), deformation conditions of a pair of barrels are detected respectively through a pair of transverse datum bars and a pair of infrared ranging sensor arrays on longitudinal datum bars respectively arranged below the barrels, the deformation conditions comprise out-of-round conditions of the barrels themselves and relative deformation conditions between the pair of barrels, and a PLC control system gives an alarm when the error occurs to remind an operator to take corrective measures in time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210262612.2A CN114749814B (en) | 2022-03-17 | 2022-03-17 | Butt joint tool and butt joint welding method for low-temperature liquid tank container cylinder |
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| CN202210262612.2A CN114749814B (en) | 2022-03-17 | 2022-03-17 | Butt joint tool and butt joint welding method for low-temperature liquid tank container cylinder |
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| CN115805396B (en) * | 2023-02-09 | 2023-04-28 | 山东亚泰机械有限公司 | Hydraulic hard tube automatic welding device |
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