CN115592247B

CN115592247B - Plasma welding machine for tank welding

Info

Publication number: CN115592247B
Application number: CN202211304711.9A
Authority: CN
Inventors: 陈果; 郑传进; 徐理正; 梁宇城; 陶配龙; 邵德万; 方以荣; 封文宇; 胡水生; 陈剑保; 肖浩
Original assignee: Lizhili Machinery Guangzhou Co ltd
Current assignee: Lizhili Machinery Guangzhou Co ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-05-30
Anticipated expiration: 2042-10-24
Also published as: CN115592247A

Abstract

The application discloses a plasma welding machine for tank body welding, which relates to the field of plasma welding machines and comprises a welding device, a rotary supporting device and a protecting device, wherein the welding device is arranged on one side of the rotary supporting device; the protection device comprises a limiting component, a positioning component and an air injection component, wherein the limiting component is arranged on two sides of a welding line, the positioning component is arranged between the limiting components, the limiting component limits the positioning component to move along the axial direction of the tank body, two ends of the positioning component are respectively connected with the inner wall of the tank body and can move on the inner wall of the tank body, the air injection component is arranged on the positioning component, and the positioning component supports the air injection component and keeps the position of the air injection component stable. The utility model has the effect that the welding seam inboard carries out gas protection when making things convenient for jar body welding.

Description

Plasma welding machine for tank welding

Technical Field

The invention relates to the field of plasma welding machines, in particular to a plasma welding machine for tank welding.

Background

The tank body is formed by sequentially welding a plurality of sections, and the quality of welding has a great influence on the quality of the tank body. For the tank body with higher quality requirement, in order to improve the quality of the tank body, the welding seam is required to be protected by adopting protective gas in the welding process, so that the condition that the welding seam is oxidized is reduced. At present, the tank welding process in factories is as follows: and a plasma welding machine is adopted to weld two sections of tank bodies outside the tank body, and protective gas is sprayed to the inner side and the outer side of the welding line during welding, so that the condition that the welding line is oxidized is reduced. The method comprises the following steps: the welding gun is provided with a nozzle which is used for spraying shielding gas to protect the outer side of the welding line, an operator is required to enter the tank body on the inner side of the welding line, and the welding gun is held by the operator to face the welding position, and the nozzle sprays shielding gas to protect the inner side of the welding line. However, the space in the tank body is narrow, and the tank body rotates in the welding process, so that the operation is inconvenient. In addition, some smaller opening tank bodies are not enough for operators to pass through, and the operators can only stretch the nozzle outside the tank body into the tank body to protect the inner side of the welding line, so that the operation is difficult, and the protection to the welding line is poor.

With respect to the related art in the above, the applicant believes that the following drawbacks exist: when the tank body is welded, the operation is inconvenient when the inner side of the welding line is subjected to gas protection.

Disclosure of Invention

In order to improve the defect that gas protection is inconvenient to carry out on the inner side of a welding line when a tank body is welded, the application provides a plasma welding machine for tank body welding.

The application provides a be used for jar body welded plasma welding machine adopts following technical scheme:

the plasma welding machine for welding the tank body comprises a welding device, a rotary supporting device and a protecting device, wherein the welding device is arranged on one side of the rotary supporting device, the tank body to be welded is arranged on the rotary supporting device, and the protecting device is arranged in the tank body to be welded; the protection device comprises a limiting component, a positioning component and an air injection component, wherein the limiting component is arranged on two sides of a welding line, the positioning component is arranged between the limiting components, the limiting component limits the positioning component to move along the axial direction of the tank body, two ends of the positioning component are respectively connected with the inner wall of the tank body and can move on the inner wall of the tank body, the air injection component is arranged on the positioning component, and the positioning component supports the air injection component and keeps the position of the air injection component stable.

By adopting the technical scheme, the limiting assembly keeps the positioning assembly stable at the welding seam, limits the axial displacement of the positioning assembly at the tank body, and when the rotary supporting device drives the tank body to rotate, the two ends of the positioning assembly move relative to the inner wall of the tank body, keeps the relative positions of the positioning assembly and the welding device stable, keeps the air injection assembly at the inner side of the welding seam, and the air injection assembly sprays protective gas to protect the inner side of the welding seam; the protection device can automatically protect the inner side of the welding line of the tank body, reduces the condition that the welding line is oxidized, does not need an operator to operate the protection device in the welding process, reduces labor cost, and improves the convenience of gas protection of the inner side of the welding line and the welding quality of the welding line.

Preferably, the limiting assembly comprises two limiting rings, the two limiting rings are respectively arranged on two sides of the welding line, and the outer wall of the limiting ring is tightly attached to the inner wall of the tank body.

Through adopting above-mentioned technical scheme, the spacing ring is installed in two sections jar bodies before two sections jar bodies butt joint, and two spacing rings are with the space restriction between two spacing rings of locating component to keep jet assembly stable in welding seam department.

Preferably, the limiting rings are annular air bags, annular limiting plates are respectively arranged on opposite sides of the two limiting rings, the limiting plates are connected with the limiting rings through clamping rings, and the limiting plates are provided with fractures.

Through adopting above-mentioned technical scheme, the gasbag is convenient for install and dismantle, and can adapt to the jar body of different internal diameters, however, coefficient of friction between gasbag and the locating component is great, appears the spacing ring rotation easily and drives the locating component and follow the pivoted condition, and cause locating component unable maintenance position stability, uses the limiting plate to separate spacing ring and locating component to reduce spacing ring and move locating component pivoted condition, keep locating component's position stability, make jet assembly can carry out gas protection to the inboard of welding seam smoothly.

Preferably, the positioning assembly comprises a balance rod and an eccentric weight, wheels are respectively arranged at two ends of the balance rod, the wheels are arranged between the two limiting rings, the wheels are in rolling connection with the inner wall of the tank body, the eccentric weight is fixed at the lower end of the balance rod, and the air injection assembly is arranged at the upper end of the balance rod.

Through adopting above-mentioned technical scheme, eccentric weight makes the focus of locating component to the lower extreme skew of balancing pole to make jar body pivoted in-process balancing pole's lower extreme can keep in the bottom of jar body, and the upper end of balancing pole can keep the welding seam department at the top of jar body, and the balancing pole can keep the position stable at jar body rotation in-process.

Preferably, the balance rod comprises an upper end rod, a lower end rod and an adjusting cylinder, wherein two ends of the adjusting cylinder are respectively connected with the upper end rod and the lower end rod in a threaded manner.

Through adopting above-mentioned technical scheme, relative rotation upper end pole and an adjusting cylinder or relative rotation lower extreme pole and an adjusting cylinder, the length of balancing pole can all be adjusted for the jar body of different internal diameters is adapted to the balancing pole.

Preferably, the air injection assembly comprises a nozzle and a protective cover, wherein the nozzle is fixed at one end of the balance bar, which is far away from the eccentric hammer, the protective cover is sleeved outside the nozzle and fixedly connected with the balance bar, the nozzle is connected with an air injection pipe, and the air injection pipe extends out of the tank body and is connected with an air source.

Through adopting above-mentioned technical scheme, the protection gas passes through the jet-propelled pipe and spouts from the nozzle, and the protection casing can make spun protection gas concentrate, slows down the diffusion of protection gas to improve the utilization ratio of protection gas, reduce the use amount of protection gas.

Preferably, the welding device comprises a stand column and a welding beam, one end of the welding beam is connected with the stand column and can rotate and slide along the stand column, the other end of the welding beam is connected with a welding gun capable of axially moving along the welding beam, and the welding gun is arranged above the top of the welding seam.

Through adopting above-mentioned technical scheme, stand and welding crossbeam make welder can remove to arbitrary required position, the welding of the jar body of being convenient for.

Preferably, one end of the cross beam, which is connected with the welding gun, is connected with a first magnet, the air injection assembly is provided with a second magnet, and the first magnet and the second magnet are attracted to each other.

Through adopting above-mentioned technical scheme, first magnet and second magnet inter attraction can alleviate the pressure of locating component to the jar body, reduces the frictional force between locating component and the jar body, and the locating component of being convenient for is stable.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the limiting assembly keeps the positioning assembly stable at the welding seam, limits the axial displacement of the positioning assembly at the tank body, and when the rotary supporting device drives the tank body to rotate, the two ends of the positioning assembly move relative to the inner wall of the tank body, so that the relative positions of the positioning assembly and the welding device are kept stable, the air injection assembly is kept at the inner side of the welding seam, and the air injection assembly sprays protective gas to protect the inner side of the welding seam; the protection device can automatically protect the inner side of the welding line of the tank body, reduces the oxidation condition of the welding line, does not need an operator to operate the protection device in the welding process, reduces labor cost, and improves the convenience of gas protection on the inner side of the welding line and the welding quality of the welding line;

2. the eccentric weight makes the focus of locating component to the lower extreme skew of balancing pole to make jar body pivoted in-process balancing pole's lower extreme can keep in jar bottom of body, and the upper end of balancing pole can keep the welding seam department at jar top of body, and the balancing pole can keep the position stable at jar body rotation in-process.

Drawings

Fig. 1 is a schematic structural view of a plasma welder for welding can bodies according to the first embodiment of the present application.

FIG. 2 is a schematic cross-sectional view of A-A.

Fig. 3 is a schematic cross-sectional view of a can and a protective device according to a first embodiment of the present application.

Fig. 4 is another schematic cross-sectional view of a canister and a protection device according to a first embodiment of the application.

Fig. 5 is an enlarged view at B of fig. 3.

Reference numerals illustrate:

1. a welding device; 11. a column; 12. welding the cross beam; 13. a welding gun; 14. a control box; 2. a slewing support device; 21. a slide rail; 22. a slipping trolley; 23. a rotary wheel; 3. a protection device; 31. a limit component; 311. a limiting ring; 312. a limiting plate; 32. a positioning assembly; 321. a balance bar; 3211. a lower end rod; 3212. an adjustment cylinder; 3213. an upper end rod; 322. an eccentric weight; 323. a wheel; 33. a jet assembly; 331. a nozzle; 332. a protective cover; 333. a gas lance; 4. a tank body.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

The embodiment of the application discloses a plasma welding machine for tank welding.

Example 1

Referring to fig. 1, a plasma welding machine for welding can bodies includes a welding device 1, a rotation supporting device 2, and a protecting device 3, a can body 4 to be welded is mounted on the rotation supporting device 2, and the rotation supporting device 2 stably supports the can body 4 and can drive the can body 4 to rotate. The welding device 1 is arranged on one side of the rotary supporting device 2, the welding device 1 is provided with a nozzle 331, the nozzle 331 faces the outer side of the welding line of the tank body 4, the nozzle 331 is connected with an air source, and the nozzle 331 sprays protective gas to isolate the outer side of the welding line of the welding place from air, so that the condition that the welding line is oxidized is reduced. The protection device 3 is arranged in the tank body 4 to be welded, and protective gas is sprayed to the inner side of the welding line of the tank body 4, wherein the protective gas is argon, and the protective gas separates air at the inner side of the welding line of the welding part, so that the condition that the welding line is oxidized is reduced, and the quality of the welding line is improved.

Referring to fig. 2, the welding device 1 includes a base (not shown), a control box 14, a column 11 and a welding beam 12, the base is fixed to the ground of a factory building by pre-buried anchor bolts, the control box 14 and the column 11 are both fixed to the base, one end of the welding beam 12 is connected to the column 11 and can rotate and slide along the column 11, and the other end of the welding beam 12 is connected to a welding gun 13 which can move axially along the welding beam 12. The control box 14 is internally provided with control elements for controlling the movement of the welding beam 12 and the welding gun 13, and the position of the welding gun 13 is adjusted by the movement of the welding beam 12 and the welding gun 13, so that the welding gun 13 is adjusted to be above the top of the welding seam of the tank body 4 to be welded.

Referring to fig. 2, the slewing bearing device 2 includes two slide rails 21 and two sliding trolleys 22, the two sliding trolleys 22 are mounted on the slide rails 21, and two ends of the sliding trolleys 22 are respectively connected with the two slide rails 21 and can move along the slide rails 21. Two rotary wheels 23 are rotatably mounted on each sliding trolley 22, the two rotary wheels 23 are respectively arranged at two ends of each sliding trolley 22, a layer of buffer rubber is wrapped outside each rotary wheel 23, each rotary wheel 23 is connected with a rotary motor, the rotary motors are fixed on the sliding trolleys 22, the tank body 4 to be welded is supported on the four rotary wheels 23, the buffer rubber can reduce abrasion of the rotary wheels 23 to the tank body 4, and the rotary motors drive the rotary wheels 23 to rotate so as to drive the tank body 4 to rotate.

Referring to fig. 2 and 3, the protection device 3 includes a limiting assembly 31, a positioning assembly 32 and an air injection assembly 33, the limiting assembly 31 is mounted on two sides of the welding seam, the positioning assembly 32 is mounted between the limiting assemblies 31, and the limiting assembly 31 limits the positioning assembly 32 to move along the axial direction of the tank 4. The both ends of locating component 32 connect the inner wall of jar body 4 respectively and can remove on the inner wall of jar body 4, and jet module 33 installs on locating component 32, and the jet direction of jet module 33 is towards the welding seam, and locating component 32 supports jet module 33 and keeps the position stability of jet module 33.

Referring to fig. 3 and 4, the limiting assembly 31 includes two limiting rings 311, the limiting rings 311 are annular air bags, the two limiting rings 311 are respectively arranged at two sides of a welding seam, the two limiting rings 311 are parallel to each other, the two limiting rings 311 are 20cm apart, the outer wall of the limiting ring 311 is clung to the inner wall of the tank body 4, the limiting rings 311 are connected with an inflating and deflating pipe for inflating and deflating, one end of the inflating and deflating pipe, which is far away from the limiting rings 311, is connected with an air tap, the limiting rings 311 can be inflated and deflated through the air tap and the inflating and deflating pipe, and the installation and the disassembly of the limiting rings 311 are convenient. Annular limiting plates 312 are respectively arranged on opposite sides of the two limiting rings 311, the limiting plates 312 are made of elastic steel sheets, the limiting plates 312 separate the limiting rings 311 from the positioning assembly 32, a plurality of circular rings are arranged on one sides of the limiting plates 312, which face the limiting rings 311, the circular rings are arranged in the inner rings of the limiting rings 311, clamping rings (not shown in the figure) penetrate through the circular rings, the limiting rings 311 are clamped by the clamping rings, gaps are reserved between the limiting plates 312 and the inner walls of the tank body 4, and the limiting plates 312 are convenient to detach. The limiting plate 312 is provided with a fracture which facilitates the removal of the limiting plate 312 from the tank 4.

Referring to fig. 3 and 4, the positioning assembly 32 includes a balance bar 321 and an eccentric weight 322, the balance bar 321 includes an upper end bar 3213, a lower end bar 3211 and an adjusting cylinder 3212, two ends of the adjusting cylinder 3212 are respectively connected with the lower end of the upper end bar 3213 and the upper end of the lower end bar 3211 in a threaded manner, and the lengths of the balance bar 321 can be adjusted by rotating the upper end bar 3213 and the adjusting cylinder 3212 relatively or rotating the lower end bar 3211 and the adjusting cylinder 3212 relatively so as to adapt to the tank bodies 4 with different inner diameters. Two wheels 323 are rotatably installed at the upper end of the upper end rod 3213 and the lower end of the lower end rod 3211 respectively, the two wheels 323 are respectively arranged at two sides of a welding line, four wheels 323 are respectively arranged between the two limiting rings 311, wherein the two wheels 323 are in rolling connection with the bottom of the inner wall of the tank body 4, and the other two wheels 323 are in rolling connection with the top of the inner wall of the tank body 4. The eccentric weight 322 is fixed in the lower extreme of lower extreme pole 3211, and eccentric weight 322 is conical, and the tip of eccentric weight 322 up, and jet module 33 installs in the upper end of upper end pole 3213 and locates between two wheels 323 of top, because eccentric weight 322 makes the focus of locating component 32 deflect to the lower extreme of lower extreme pole 3211, wheel 323 and jar inner wall roll connection of body 4, at the in-process of the rotation of body 4, locating component 32 self gravity can make locating component 32 rotate for jar body 4 to keep locating component 32's position movement less, keep locating component 32 basically stable.

Referring to fig. 3 and 5, the air injection assembly 33 includes a nozzle 331 and a shield 332, the nozzle 331 is fixed at the upper end of the upper rod 3213, the shield 332 is sleeved outside the nozzle 331 and is fixedly connected to the upper rod 3213, an opening of the shield 332 faces the weld, a distance between each position of an opening edge of the shield 332 and an inner wall of the tank 4 is 5mm, and a length of the shield 332 in a circumferential direction of the tank 4 is not less than 20cm. The nozzle 331 is connected with the jet pipe 333, and the jet pipe 333 extends to jar body 4 and connects the air supply outward, and shielding gas spouts the welding seam from nozzle 331 through jet pipe 333, and protection casing 332 can make spun shielding gas concentrate, slows down shielding gas's diffusion to improve shielding gas's utilization ratio, reduce shielding gas's use amount.

In another embodiment, a first magnet (not shown) is connected to one end of the beam connected with the welding gun 13 through a connecting rod, the first magnet is disposed on one side of the welding gun 13 facing away from the rotation direction of the tank 4, a second magnet (not shown) is mounted on the protective cover 332, and the second magnet is attached to the outer wall of the protective cover 332. The first magnet and the second magnet attract each other, apply the upward effort of inclination to the upper end of balancing pole 321 dorsad jar body 4 direction of rotation, can alleviate the pressure of locating component 32 to jar body 4, reduce the frictional force between wheel 323 and jar body 4, reduce the rotation angle of locating pole, improve the stability of balancing pole 321.

The implementation principle of the plasma welding machine for tank welding is as follows: before the two sections of tank bodies 4 to be welded are in butt joint, two limiting rings 311 are firstly respectively installed at the installation positions in the two sections of tank bodies 4 to be welded, then the limiting rings 311 are inflated, the limiting rings 311 are tightly attached to the inner wall of the tank bodies 4, and then limiting plates 312 are clamped to the limiting rings 311 through clamping rings, so that the installation of the limiting assembly 31 is completed. Then, the nozzle 331 and the shield 332 are respectively mounted on the upper end of the balance bar 321, the balance bar 321 is mounted in one section of the tank body 4 and is mounted on one side of the limiting plate 312 close to the welding line, one wheel 323 at the lower end of the balance bar 321 is placed at the bottom of the inner wall of the tank body 4, the other wheel 323 at the lower end of the balance bar 321 is suspended outside the tank body 4 at the moment, the adjusting cylinder 3212 or the upper end bar 3213 is rotated to adjust the length of the balance bar 321, so that one wheel 323 at the upper end of the balance bar 321 is abutted against the top of the inner wall of the tank body 4, the other wheel 323 at the upper end of the balance bar 321 is suspended outside the tank body 4 at the moment, the axis of the wheel 323 is parallel to the axis of the tank body 4, and then the balance bar 321 is kept stable during the abutting of the two sections of the tank body 4, and the two suspended wheels 323 enter into the other section of the tank body 4 and are abutted against the inner wall of the tank body 4. Then the two sections of tank bodies 4 are mutually fixed by spot welding, and the mutually fixed two sections of tank bodies 4 are hoisted to the rotary supporting device 2 to start welding operation. Moving the welding gun 13 to the upper part of the butt joint gap of the two sections of tank bodies 4, connecting the air ejector tube 333 to an air source, starting the air source and the welding gun 13, starting to weld the butt joint position of the two sections of tank bodies 4, starting the rotary motor to drive the rotary wheel 23 to rotate, driving the tank bodies 4 to rotate, ejecting argon gas from the tank bodies 4 to the welding position of the welding gun 13, and protecting the inner side of the welding seam by gas to separate the welding seam from the air in the tank bodies 4. Along with the rotation of the tank body 4, the wheels 323 rotate under the action of friction force and follow the tank body 4 to enable the balance rod 321 to rotate by an angle, at this time, the gravity of the balance rod 321 can enable the balance rod 321 to receive an acting force opposite to the direction of the friction force due to the fact that the gravity center of the balance rod 321 is offset towards the lower end of the balance rod 321, when the acting force is equal to the friction force, the balance rod 321 can be stabilized at the angle and the position, and as long as the nozzle 331 or the protective cover 332 at this time is aligned with the welding position, the air injection assembly 33 can be aligned with the welding position and kept stable, and the welding seam of the welding position can be continuously protected by gas. The protection device 3 of this application can carry out gas protection to the inboard of the welding seam of jar body 4 voluntarily, reduces the condition that the welding seam is oxidized, in welding process, need not operating personnel operation protection device 3, when reducing the human cost, has improved the convenience of the inboard gas protection of welding seam and the welding quality of welding seam. For the welding of the tank body 4 which can not be accessed to the inside by some operators, the embodiment can also perform gas protection on the inside of the welding seam; to the opening not in the middle of the cover, but the jar body 4 welding of one side of irrigating, the protection device 3 of this application also can accomplish the inboard gas protection operation of weld joint, convenient to use, application scope is wide just can accomplish to the inside gas protection operation of welding department welding seam of need not that operating personnel gets into jar body 4.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A be used for jar body welded plasma welding machine which characterized in that: the welding device comprises a welding device (1), a rotary supporting device (2) and a protecting device (3), wherein the welding device (1) is arranged on one side of the rotary supporting device (2), a tank body (4) to be welded is arranged on the rotary supporting device (2), and the protecting device (3) is arranged in the tank body (4) to be welded; the protection device (3) comprises a limiting component (31), a positioning component (32) and an air injection component (33), wherein the limiting component (31) is arranged on two sides of a welding line, the positioning component (32) is arranged between the limiting components (31), the limiting component (31) limits the positioning component (32) to move along the axial direction of the tank body (4), two ends of the positioning component (32) are respectively connected with the inner wall of the tank body (4) and can move on the inner wall of the tank body (4), the air injection component (33) is arranged on the positioning component (32), and the positioning component (32) supports the air injection component (33) and keeps the position of the air injection component (33) stable;

the limiting assembly (31) comprises two limiting rings (311), the two limiting rings (311) are respectively arranged on two sides of the welding line, and the outer wall of the limiting ring (311) is tightly attached to the inner wall of the tank body (4); the limiting rings (311) are annular air bags, annular limiting plates (312) are respectively arranged on one sides of the two limiting rings (311) which are opposite, the limiting plates (312) are connected with the limiting rings (311) through clamping rings, and the limiting plates (312) are provided with fractures;

the positioning assembly (32) comprises a balance rod (321) and an eccentric weight (322), wheels (323) are respectively arranged at two ends of the balance rod (321), the wheels (323) are arranged between the two limiting rings (311), the wheels (323) are connected with the inner wall of the tank body (4) in a rolling mode, the eccentric weight (322) is fixed at the lower end of the balance rod (321), and the air injection assembly (33) is arranged at the upper end of the balance rod (321).

2. A plasma welder for can welding as defined in claim 1 wherein: the balance rod (321) comprises an upper end rod (3213), a lower end rod (3211) and an adjusting cylinder (3212), and two ends of the adjusting cylinder (3212) are respectively connected with the upper end rod (3213) and the lower end rod (3211) in a threaded mode.

3. A plasma welder for can welding as defined in claim 1 wherein: jet subassembly (33) are including nozzle (331) and protection casing (332), nozzle (331) are fixed in balancing pole (321) are kept away from the one end of eccentric weight (322), protection casing (332) cover are located outside nozzle (331) and fixed connection balancing pole (321), nozzle (331) are connected with jet pipe (333), jet pipe (333) extend outside jar body (4) and connect the air supply.

4. A plasma welder for can welding as defined in claim 1 wherein: the welding device (1) comprises a stand column (11) and a welding beam (12), one end of the welding beam (12) is connected with the stand column (11) and can rotate and slide along the stand column (11), the other end of the welding beam (12) is connected with a welding gun (13) capable of axially moving along the welding beam (12), and the welding gun (13) is arranged above the top of a welding seam.

5. A plasma welder for can welding as defined in claim 4 wherein: one end of the beam, which is connected with the welding gun (13), is connected with a first magnet, the air injection assembly (33) is provided with a second magnet, and the first magnet and the second magnet are attracted to each other.