CN112296488B

CN112296488B - Welding device for welding in pipe

Info

Publication number: CN112296488B
Application number: CN202011151427.3A
Authority: CN
Inventors: 郭学文
Original assignee: Wilhelm Suzhou Cladding Technology Co ltd
Current assignee: Wilhelm Suzhou Cladding Technology Co ltd
Priority date: 2020-10-25
Filing date: 2020-10-25
Publication date: 2022-08-09
Anticipated expiration: 2040-10-25
Also published as: CN112296488A

Abstract

The invention relates to the technical field of in-pipe welding, in particular to a welding device for in-pipe welding, which comprises a first supporting mechanism, a welding mechanism, a first driving mechanism and a supply mechanism, wherein the first driving mechanism drives the welding mechanism to move back and forth on the first supporting mechanism, the welding mechanism comprises a welding support which can extend into a pipe to be welded, and a first supporting guide unit for supporting and guiding the welding support to move is fixedly arranged on the first supporting mechanism; the welding support is internally provided with a plurality of welding gun assemblies, each welding assembly comprises a plurality of welding gun units, each welding gun unit comprises a first electrode and a second electrode for welding, and the supply mechanism provides electric arcs for the first electrode and the second electrode and provides protective gas required during welding. The invention has the advantages that: this application can stretch into the welding support in waiting to weld the pipe through the setting, realizes longer intraductal welding, in addition through the setting of first electrode and second electrode, optimizes the welding effect.

Description

Welding device for welding in pipe

Technical Field

The invention relates to the technical field of in-pipe welding, in particular to a welding device for in-pipe welding.

Background

The welding in the pipe belongs to prior art, for example the nozzle stub, direct manual welding and slope welding can, but to oil drilling and chemical industry, the welded joint that requires to reduce as far as possible is in order to avoid safe risk, and this just needs the complete pipe that length is longer, in order to deal with the corrosive medium of operating mode, extension equipment life, still need the corrosion-resistant alloy coating of certain thickness of welding in the pipe simultaneously. How to realize the long in-pipe welding is a technical problem which needs to be solved urgently.

Disclosure of Invention

To achieve long pipe internal welding, the invention provides a welding device for pipe internal welding.

In order to achieve the purpose, the invention adopts the following technical scheme:

a welding device for welding in a pipe comprises a first supporting mechanism, a welding mechanism, a first driving mechanism and a supply mechanism, wherein the first driving mechanism drives the welding mechanism to move back and forth on the first supporting mechanism, the welding mechanism comprises a welding support which can extend into the pipe to be welded, and a first supporting and guiding unit for supporting and guiding the welding support to move is fixedly arranged on the first supporting mechanism; the welding support is internally provided with a plurality of welding gun assemblies, each welding assembly comprises a plurality of welding gun units, each welding gun unit comprises a first electrode and a second electrode for welding, and the supply mechanism provides electric arcs for the first electrode and the second electrode and provides protective gas required during welding.

Specifically speaking, the welding subassembly is still including ordering about the every single move drive unit that corresponds welder unit every single move, every single move drive unit includes every single move driving motor, every single move direction slider, actuating lever, four-bar module, every single move driving motor orders about every single move direction slider and makes a round trip to slide along the direction of welding support, the one end and the every single move direction slider of actuating lever are articulated, and the other end is articulated with the head end of the first connecting rod in the four-bar module, and the middle part and the end and second connecting rod, third connecting rod, fourth connecting rod formation four-bar module of first connecting rod are fixed with the welder unit on the vertical setting and the fourth connecting rod of keeping away from every single move direction slider.

Specifically, the first connecting rod is provided with a certain angle, the corner is hinged to a hinged point on the welding support, the driving rod is provided with a set radian, the second connecting rod is parallel to the fourth connecting rod, and the third connecting rod is parallel to the first connecting rod.

Specifically, the fourth connecting rod is of an L-shaped structure, a vertical part forms a four-connecting-rod module, and a transverse part is fixedly provided with a welding gun unit.

Specifically, the transverse part is also provided with an industrial camera which is opposite to the welding position.

Specifically, the welding support side is also provided with a position sensor.

Specifically, the welding support is further provided with a universal support elastic component, and during welding, the universal support elastic component can abut against the bottom of the inner side of the pipe to be welded.

Specifically, the universal support elastic members are arranged in an array along the length direction of the weld support.

Specifically, guide grooves are respectively formed in two side edges of the lower end portion of the welding support, and the first support guide unit is a guide wheel capable of rotating in the guide grooves.

Specifically, the first driving mechanism comprises a welding driving motor arranged at the bottom of the welding mechanism, and a first gear meshed with a rack arranged on the side edge of the first supporting mechanism is arranged at the driving end of the welding driving motor.

The invention has the advantages that:

(1) this application can stretch into the welding support in waiting to weld the pipe through the setting, realizes longer intraductal welding, in addition through the setting of first electrode and second electrode, optimizes the welding effect.

(2) The four-bar module realizes pitching of the welding gun under the condition of ensuring the welding direction.

(3) The universal support elastic component can effectively offset the welding distance caused by the plumb of the steel wire rope, and the universal support elastic component is an elastic component, so that the mode ensures the error of the welding distance.

(4) The arrangement of the guide wheel and the guide groove ensures that the movement of the welding support is in a straight line.

(5) The first gear and rack combination changes the rotation into a linear drive.

Drawings

Fig. 1 is a front view of the device of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a perspective view of the welding device.

Fig. 4 is an enlarged view of a portion B in fig. 3.

Fig. 5 is a perspective view of a welded assembly in the welding apparatus.

Fig. 6 is a front view of the support rotating means.

Fig. 7 is an enlarged view of a portion C in fig. 6.

The notations in the figures have the following meanings:

1-first welding device 2-second welding device 3-support rotating device

4-cooling mechanism 5-pipe to be welded

2101-first electrode 2102-second electrode

2211-pitch drive motor 2212-pitch guide slider 2213-drive rod

2214-four bar linkage module 22141-first bar linkage 22142-second bar linkage

22143-third Link 22144-fourth Link

221441-transverse part 221442-vertical part

23-Industrial camera

42-wire reel

431-godet rod 432-horizontal godet 433-vertical godet 434-guide wire drive

435-welding wire tube

501-supporting seat 502-foundation bolt 503-steel wire rope

511-second roller

521-second motor 522-friction wheel 523-bearing

531-limit plate 532-length limit sleeve 533-guide wheel 534-connecting rod 535-hook

536-CHAIN 537-TENSIONER 538-SHIFT GUIDE rail 539-EAR PLATE

541-conducting rod 542-conducting limiting sleeve 543-spring 544-grounding wire

Detailed Description

1-7, an in-pipe welding system includes

A support rotating device 3 capable of supporting and rotating the pipe 5 to be welded in a circular shape;

the two groups of welding devices are respectively a first welding device 1 and a second welding device 2 which are symmetrically arranged on two sides of the supporting and rotating device 3.

And the cooling device is used for cooling the to-be-welded pipe 5 during welding.

The support rotation device 3 and the welding device are described in detail below, respectively:

1. welding device

Each group of welding devices comprises a first supporting mechanism, a welding mechanism, a first driving mechanism and a supply mechanism.

Each mechanism is described in detail below.

First support mechanism

The first support mechanism is fixedly provided with a first support guide unit for supporting and guiding the welding support to move; guide grooves are respectively formed in two side edges of the lower end portion of the welding support, and the first support guide unit is a guide wheel capable of rotating in the guide grooves.

1.2 welding mechanism

The welding mechanism comprises a welding support which is extendable into the pipe 5 to be welded, a plurality of welding assemblies, each comprising a plurality of welding torch units comprising first and second electrodes 2102 for welding. The dual-electrode arrangement can accelerate welding and improve welding effect.

As shown in fig. 5, the welding assembly further includes a pitch driving unit for driving the corresponding welding gun unit to pitch, where the pitch driving unit includes a pitch driving motor 2211, a pitch guiding slider 2212, a driving rod 2213, and a four-bar module 2214, the pitch driving motor 2211 drives the pitch guiding slider 2212 to slide back and forth along the direction of the welding support, one end of the driving rod 2213 is hinged to the pitch guiding slider 2212, and the other end is hinged to the head end of the first bar 22141 in the four-bar module 2214.

The first link 22141 is a bent rod, the corners are hinged joints on the welding support, the driving rod 2213 has a set radian, the fourth link 22144 is an L-shaped structure, and the transverse portion 221441 is fixedly provided with a welding gun unit. The second link 22142 is parallel to the vertical portion of the fourth link 22144 and the third link 22143 is parallel to the corner-to-end portion of the first link 22141.

The corner-to-end portion of the first link 22141 and the vertical portions of the second link 22142, the third link 22143, and the fourth link 22144 form a four-link module 2214, which four-link module 2214 is such that the welding gun unit is always on the inside wall of the tube 5 to be welded.

The transverse portion 221441 is also provided with an industrial camera 23, the industrial camera 23 facing the weld.

And the welding support side surface is also provided with a position sensor.

Still be provided with universal support elastomeric element on the welding support, during the welding, universal support elastomeric element can support the inboard bottom of waiting to weld pipe 5. In the scheme, a plurality of universal support elastic components are arranged in an array along the length direction of the welding support.

1.3 first drive mechanism

The first driving mechanism drives the welding mechanism to move back and forth on the first supporting mechanism, the first driving mechanism comprises a welding driving motor arranged at the bottom of the welding mechanism, and a first gear meshed with a rack arranged on the side edge of the first supporting mechanism is arranged on a driving end of the welding driving motor.

1.4 supply mechanism

As shown in fig. 2-4, the feeding mechanism includes a fixing frame for supporting the wire reel 42, and a wire guiding mechanism, the wire guiding mechanism includes a wire guiding rod 431 that the welding wire passes by, a horizontal wire guiding reel 432, a vertical wire guiding reel 433, and a wire guiding drive 434, the wire guiding drive 434 includes a wire guiding motor and a wire guiding wheel connected with the wire guiding motor, and the welding wire enters the welding wire tube 435 through the wire guiding wheel. The wire tube 435 is secured to a weld support.

The supply mechanism further comprises a welding machine for providing electric arcs for the welding mechanism, an air storage tank for providing protective gas and a corresponding air pipe, the welding machine is fixed at the end part of the first supporting mechanism far away from the supporting and rotating device 3, and the first driving mechanism drives the fixing frame, the wire guide mechanism, the air storage tank, the air pipe and the welding mechanism to move back and forth on the first supporting mechanism.

The number of the supply units is the same as that of the welding gun units, and the supply units and the welding gun units are arranged in a one-to-one correspondence mode.

The supply mechanism provides the first electrode 2101 and the second electrode 2102 with shielding gas required for the arc and welding.

Wherein the feeding mechanism as a whole can be moved together with the welding support on the first support guiding unit, as also shown in the first welding device 1 in fig. 1, wherein a welder providing an electric arc can be fixed on the first support mechanism, wherein the electric arc wire passes through the elastic receiving unit, when the welding support is far away from the pipe 5 to be welded and close to the welder, the wire harness is acted by a torsion spring in the elastic receiving unit so that the electric arc wire is wound on the wire coil, and when the welding support is extended into the pipe 5 to be welded, the electric arc wire is gradually wound off the wire coil due to the end of the electric arc wire close to the electrode being fixed.

2. Support rotating device 3

As shown in fig. 6 to 7, the support rotating device 3 includes a support base 501, and further includes:

the guide supporting mechanism comprises a supporting mechanism used for supporting the pipe 5 to be welded;

the second driving mechanism can drive the pipe 5 to be welded to rotate annularly;

the limiting mechanism is used for supporting the pipe 5 to be welded to rotate circularly and simultaneously not to separate from the guide supporting mechanism;

and a conductive member for guiding the static electricity on the pipe 5 to be welded to the ground.

Each mechanism is described in detail below:

2.1, guide supporting mechanism

The guide supporting mechanism comprises a plurality of groups of roller groups, each group of roller groups comprises two second rollers 511, the second rollers 511 can be used for treating two sides of the lower part of the outer surface of the welded pipe 5 in a plain mode, and the rotating shafts of the two second rollers 511 are parallel to the central axis of the welded pipe 5 in the length direction.

And shift guide rails 538 are arranged below each group of roller groups and below the second driving mechanism in the guide supporting mechanism, and the shift guide rails 538 are arranged in a direction perpendicular to the length direction of the supporting seat 501. The arrangement of the shifting guide rail 538 can ensure that the pipe 5 to be welded is attached to each group of roller groups.

Optimized, the supporting seat 501 is divided into a plurality of units, the bottom of each unit is provided with an anchor bolt 502, optimized moving wheels which can be adjusted in the height direction are further arranged at the position of the anchor bolt 502, the supporting seat 501 is convenient to carry in the process of assembling different numbers of pipes 5 to be welded according to different differences, the height of the anchor bolt 502 is also adjustable, and therefore the supporting seat can be used as rough adjustment before the guide rail 538 is shifted. After the supporting seat 501 is adjusted for the first time, the supporting seat is fixed by the foundation bolt 502 subsequently, and displacement is prevented.

Optimally, the distance between the supporting surface of each supporting seat 501 and the ground is adjustable. This ensures that the bearing surfaces of all the seats 501 are determined according to the shape of the body of the pipe 5 to be welded. The pipe 5 to be welded in this application is typically a straight pipe, but may also be a deflection within a certain angular range.

The support rotating device 3 is further provided with two steel wire ropes 503, and the two steel wire ropes 503 are arranged side by side and used for supporting the welding supports entering the pipe 5 to be welded. The two ends of the steel wire rope 503 are tensioned by the pulling members arranged on the two end supporting seats 501.

2.2 second drive mechanism

The second driving mechanism comprises a second driving assembly, the second driving assembly comprises a second motor 521 fixed on the supporting seat 501, the tail end of a driving rod of the second motor 521 is fixed through a bearing 523, a friction wheel 522 is fixed on the middle of the driving rod, the friction wheel 522 can be in contact with the outer side wall of the pipe to be welded to drive the pipe to be welded 5 to rotate, and the second driving assembly further comprises a first roller matched with the two sides of the friction wheel 522 and used for supporting the pipe to be welded 5. The center of the supporting arc formed by the friction wheel 522 and the first roller coincides with the center of the supporting arc formed by the roller group.

Preferably, the first roller is identical to the second roller 511 in the roller group, which reduces the kinds of components of the entire system.

2.3, limiting mechanism

Stop gear is including parcel unit and chain subassembly, the parcel unit can wrap up treats welded pipe 5's upper portion surface and can lead and treat welded pipe 5, parcel unit both sides correspond through the otic placode 539 of chain subassembly and supporting seat 501 both sides respectively and are connected.

Specifically, the wrapping unit includes a wrapping frame, and a plurality of guide wheels 533 mounted on the wrapping frame, where the guide wheels 533 can be located at two sides of the upper portion of the outer surface of the pipe 5 to be welded, and the roller groups can be located at two sides of the lower portion of the outer surface of the pipe 5 to be welded. Each roller group comprises two second rollers 511, the two second rollers 511 are respectively positioned at two sides of the pipe 5 to be welded, and the rollers are parallel to the length direction of the supporting seat 501.

The wrapping frame comprises four limiting plates 531 connected through a plurality of connecting rods 534, length limiting sleeves 532 and guide wheels 533 are arranged on the connecting rods 534 arranged between the limiting plates 531 on the left side and the right side and the corresponding adjacent limiting plates 531, the guide wheels 533 are sleeved on the connecting rods 534 close to the positions of the pipes to be welded 5, hooks 535 connected with chains 536 are hung on the connecting rods 534 between the two limiting plates 531 in the middle, and the hooks 535 can slide on the connecting rods 534.

The chain assembly includes a chain 536 and a tensioner 537, the chain 536 may be secured through a portion of the tensioner 537, and the other end of the tensioner 537 is secured to the ear plate 539.

2.4 conductive component

As shown in fig. 7, the conductor assembly is disposed on the supporting seat 501, the conductor assembly includes a conductive limiting sleeve 542, a spring 543, and a grounding wire 544, the conductive limiting sleeve 542 is sleeved with a conductive rod 541 capable of contacting with the bottom of the pipe 5 to be welded, the conductive rod 541 can move back and forth on the conductive limiting sleeve 542 through the spring 543, the conductive rod 541 is connected with the supporting seat 501 through the grounding wire 544, static electricity generated by welding and rotational friction of the pipe 5 to be welded is guided to the ground, and the arrangement of the spring 543 enables the conductive rod 541 to contact with the pipe 5 to be welded all the time.

3. Cooling device

As shown in fig. 1, the cooling device includes a spraying cooling mechanism 4 disposed above the supporting seat 501, and the cooling water sprayed by the spraying cooling mechanism 4 is in an atomized state in this scheme. The spraying and cooling mechanism 4 can be fixedly arranged, correspondingly arranged on each group of welding devices in the scheme and moves along with the welding support, so that the spraying range of the spraying and cooling mechanism 4 only comprises the pipes to be welded 5 at the positions in the welding process and before and after the welding process. The spraying position moves along with the movement of the welding device, so that the consumption of cooling water is reduced, the humidity of a working place due to the spraying of a large amount of water is avoided, a relatively dry welding environment is kept, and the welding effect is improved.

The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A welding device for welding in a pipe is characterized by comprising a first supporting mechanism, a welding mechanism, a first driving mechanism and a supply mechanism, wherein the first driving mechanism drives the welding mechanism to move back and forth on the first supporting mechanism, the welding mechanism comprises a welding support which can extend into a pipe (5) to be welded, and a first supporting and guiding unit for supporting and guiding the welding support to move is fixedly arranged on the first supporting mechanism; a plurality of welding gun assemblies are arranged in the welding support, each welding assembly comprises a plurality of welding gun units, each welding gun unit comprises a first electrode (2101) and a second electrode (2102) for welding, and the feeding mechanism provides arc and shielding gas required by welding for the first electrode (2101) and the second electrode (2102);

the welding mechanism comprises a welding support capable of extending into a pipe (5) to be welded, and a plurality of welding assemblies, wherein each welding assembly comprises a plurality of welding gun units;

the welding assembly further comprises a pitching driving unit driving the corresponding welding gun unit to pitch, the pitching driving unit comprises a pitching driving motor (2211), a pitching guide slider (2212), a driving rod (2213) and a four-bar module (2214), the pitching driving motor (2211) drives the pitching guide slider (2212) to slide back and forth along the direction of a welding support, one end of the driving rod (2213) is hinged with the pitching guide slider (2212), the other end of the driving rod is hinged with the head end of a first connecting rod (22141) in the four-bar module (2214), the first connecting rod (22141) is a bent rod, the corner of the first connecting rod is a hinged point hinged on the welding support, the driving rod (2213) has a set radian, the fourth connecting rod (22144) is of an L-shaped structure, and the welding gun unit is fixedly arranged on the transverse part (221441); the second link (22142) is parallel to the vertical portion of the fourth link (22144), and the third link (22143) is parallel to the corner-to-end portion of the first link (22141); the corner-to-end portion of the first link (22141) forms a four-link module (2214) with the vertical portions of the second link (22142), the third link (22143), and the fourth link (22144).

2. A welding device for welding inside a pipe according to claim 1, characterized in that the transversal portion (221441) of said fourth link (22144) is further provided with an industrial camera (23), said industrial camera (23) facing the weld.

3. The welding device for welding inside of a pipe of claim 1, wherein said welding support side is further provided with a position sensor.

4. A welding device for welding inside a pipe according to claim 1, characterized in that the welding support is further provided with a universal support elastic member, and the universal support elastic member can abut against the inner bottom of the pipe (5) to be welded during welding.

5. The welding apparatus of claim 4, wherein the gimbal support spring is arranged in a plurality of arrays along a length of the weld support.

6. The welding device for welding inside the pipe as claimed in claim 1, wherein the welding support has guide grooves on two sides of its lower end, and the first support guiding unit is a guide wheel capable of rotating in the guide grooves.

7. The welding device for welding inside the pipe according to claim 1, wherein the first driving mechanism comprises a welding driving motor arranged at the bottom of the welding mechanism, and a first gear meshed with a rack arranged on the side of the first supporting mechanism is arranged on a driving end of the welding driving motor.