CN112296488A

CN112296488A - Welding device for welding in pipe

Info

Publication number: CN112296488A
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: 2021-02-02
Anticipated expiration: 2040-10-25
Also published as: CN112296488B

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 (11), 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 (11), the welding mechanism comprises a welding support (201) which can extend into a pipe (5) to be welded, and a first supporting and guiding unit (101) for supporting and guiding the welding support (201) to move is fixedly arranged on the first supporting mechanism (11); a plurality of welding gun assemblies (210) are arranged in the welding support (201), each welding assembly comprises a plurality of welding gun units, each welding gun unit comprises a first electrode (2101) and a second electrode (2102) used for welding, and the feeding mechanism provides electric arcs for the first electrode (2101) and the second electrode (2102) and protective gas required during welding.

Specifically, the welding assembly further comprises a pitch driving unit for driving the corresponding welding gun unit to pitch, the pitch driving unit comprises 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 (201), one end of the driving rod (2213) is hinged to the pitch guiding slider (2212), the other end of the driving rod is hinged to the head end of a first connecting rod (22141) in the four-bar module (2214), the middle part and the tail end of the first connecting rod (22141) form the four-bar module (2214) with a second connecting rod (22142), a third connecting rod (22143) and the fourth connecting rod (22144), and the welding gun unit (22144) is fixed on the fourth connecting rod (22144) which is vertically arranged and far away from the pitch guiding slider (2212).

Specifically, the first link (22141) is provided with a certain angle, the corner is a hinge point hinged on the welding support (201), the driving rod (2213) has a set arc, the second link (22142) is parallel to the fourth link (22144), and the third link (22143) is parallel to the first link (22141).

Specifically, the fourth link (22144) is in an L-shaped structure, the vertical part (221442) forms a four-link module (2214), and the transverse part (221441) is fixedly provided with a welding gun unit.

In particular, the transverse portion (221441) is also provided with an industrial camera (23), the industrial camera (23) facing the weld.

Specifically, a position sensor is arranged on the side surface of the welding support (201).

Specifically, a universal supporting elastic component is further arranged on the welding support (201), and during welding, the universal supporting elastic component can abut against the bottom of the inner side of the pipe (5) to be welded.

Specifically, the universal support elastic components are arranged in a plurality along the length direction of the welding support (201).

Specifically, guide grooves are respectively formed in two side edges of the lower end portion of the welding support (201), and the first support guide unit (101) is a guide wheel (533) 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 (31) arranged on the side edge of the first supporting mechanism (11) is arranged on 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

11-first support mechanism 101-first support guide unit

201-weld support 210-weld gun assembly 2101-first electrode v 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

31-toothed rack

41-fixed frame 42-wire reel

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

4341-guide wire motor 4342-guide wire rotating wheel 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 11, a welding mechanism, a first driving mechanism and a supply mechanism.

Each mechanism is described in detail below.

1.1 first support mechanism 11

A first support guide unit 101 for supporting and guiding the movement of the welding support 201 is fixedly arranged on the first support mechanism 11; guide grooves are respectively formed in two side edges of the lower end portion of the welding support 201, and the first support guide unit 101 is a guide wheel 533 capable of rotating in the guide grooves.

1.2 welding mechanism

The welding mechanism comprises a welding support 201, which is extendable into the pipe 5 to be welded, a plurality of welding assemblies, each comprising a plurality of welding torch units comprising a first and a second electrode 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, the pitch driving unit includes a pitch driving motor 2211, a pitch guide slider 2212, a driving rod 2213, and a four-bar module 2214, the pitch driving motor 2211 drives the pitch guide slider 2212 to slide back and forth along the direction of the welding support 201, one end of the driving rod 2213 is hinged to the pitch guide slider 2212, the other end is hinged to the head end of the first bar 22141 in the four-bar module 2214, the middle and the end of the first bar 22141 are hinged to the second bar 22142, the third bar 22143, and the fourth bar 22144 to form the four-bar module 2214, and the welding gun unit is fixed to the fourth bar 22144 which is vertically arranged and far from the pitch guide slider 2212. The four bar linkage module 2214 allows the welding gun unit to be always on the inside wall of the pipe 5 to be welded.

The first link 22141 is provided with a certain angle, the corner is a hinge point hinged on the welding support 201, the driving rod 2213 has a set radian, the second link 22142 is parallel to the fourth link 22144, and the third link 22143 is parallel to the first link 22141.

The fourth link 22144 has an L-shaped structure, the vertical portion 221442 forms a four-link module 2214, and the transverse portion 221441 is fixedly provided with a welding gun unit.

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

The side of the welding support 201 is also provided with a position sensor.

Still be provided with universal support elastomeric element on the welding support 201, during the welding, universal support elastomeric element can support the inboard bottom of waiting to weld pipe 5. In this embodiment, the gimbal support elastic members are arranged in an array along the length of the weld support 201.

1.3 first drive mechanism

The first driving mechanism drives the welding mechanism to move back and forth on the first supporting mechanism 11, 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 31 arranged on the side edge of the first supporting mechanism 11 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 41 for supporting a wire reel 42, a wire guiding mechanism, the wire guiding mechanism includes a wire guiding rod 431, a horizontal wire reel 432, a vertical wire reel 433, and a wire guiding drive 434, the wire guiding drive 434 includes a wire guiding motor 4341 and a wire guiding wheel 4342 connected to the wire guiding motor 4341, and the welding wire enters a welding wire tube 435 through the wire guiding wheel 4342. The wire tube 435 is secured to the weld support 201.

The supply mechanism further comprises a welding machine for providing electric arcs for the welding mechanism, a gas storage tank for providing protective gas and a corresponding gas pipe, the welding machine is fixed at the end part, far away from the supporting and rotating device 3, of the first supporting mechanism 11, and the first driving mechanism drives the fixing frame 41, the wire guide mechanism, the gas storage tank, the gas pipe and the welding mechanism to move back and forth on the first supporting mechanism 11.

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 move together with the welding support on the first support guiding unit 101, as also shown in the first welding device 1 in fig. 1, wherein the welder providing the electric arc can be fixed on the first support mechanism 11, wherein the electric arc wire passes through the elastic receiving unit, when the welding support 201 is far away from the pipe 5 to be welded and close to the welder, the wire harness passes through the torsion spring action in the elastic receiving unit, so that the electric arc wire is wound on the wire coil, and when the welding support 201 extends into the pipe 5 to be welded, the electric arc wire is gradually wound off from the wire coil due to the end fixing of the electric arc wire close to the electrode.

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 201 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 201, so that the spraying range of the spraying and cooling mechanism 4 only comprises the pipes 5 to be welded 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. The welding device for welding the inside of the pipe is characterized by comprising a first supporting mechanism (11), a welding mechanism, a first driving mechanism and a supplying mechanism, wherein the first driving mechanism drives the welding mechanism to move back and forth on the first supporting mechanism (11), the welding mechanism comprises a welding support (201) which can extend into a pipe (5) to be welded, and a first supporting and guiding unit (101) for supporting and guiding the welding support (201) to move is fixedly arranged on the first supporting mechanism (11); a plurality of welding gun assemblies (210) are arranged in the welding support (201), each welding assembly comprises a plurality of welding gun units, each welding gun unit comprises a first electrode (2101) and a second electrode (2102) used for welding, and the feeding mechanism provides electric arcs for the first electrode (2101) and the second electrode (2102) and protective gas required during welding.

2. A welding device for welding inside of a pipe according to claim 1, the welding assembly also comprises a pitching driving unit for driving the corresponding welding gun unit to pitch, the pitching driving unit comprises a pitching driving motor (2211), a pitching guide sliding block (2212), a driving rod (2213) and a four-bar module (2214), the pitching driving motor (2211) drives the pitching guide sliding block (2212) to slide back and forth along the direction of the welding support (201), one end of the driving rod (2213) is hinged to the pitching guide sliding block (2212), the other end of the driving rod is hinged to the head end of a first connecting rod (22141) in the four-connecting-rod module (2214), the middle and the tail end of the first connecting rod (22141) form the four-connecting-rod module (2214) with a second connecting rod (22142), a third connecting rod (22143) and a fourth connecting rod (22144), and a welding gun unit is fixed on the fourth connecting rod (22144) which is vertically arranged and far away from the pitching guide sliding block (2212).

3. The welding device for welding inside pipes according to claim 2, characterized in that said first link (22141) is provided with an angle, the corner is the hinge point hinged to said welding support (201), said driving rod (2213) has a set arc, said second link (22142) is parallel to said fourth link (22144), said third link (22143) is parallel to said first link (22141).

4. A welding device for welding inside pipes according to claim 2, characterized in that said fourth link (22144) is of L-shaped configuration, the vertical part (221442) forming a four-link module (2214), the transverse part (221441) being fixedly provided with a welding torch unit.

5. A welding device for welding inside pipes according to claim 4, characterized in that said transversal portion (221441) is also provided with an industrial camera (23), said industrial camera (23) facing the weld.

6. A welding device for welding inside a pipe according to claim 2, characterized in that the side of said welding support (201) is also provided with a position sensor.

7. A welding device for welding inside a pipe according to claim 1, characterized in that the welding support (201) is further provided with a universal support elastic component, and the universal support elastic component can abut against the inner bottom of the pipe (5) to be welded during welding.

8. A welding device for welding inside a pipe according to claim 7, characterized in that said gimbal support elastic member is provided in a plurality in an array along the length direction of the welding support (201).

9. The welding device for welding inside the pipe according to claim 1, wherein two sides of the lower end of the welding support (201) are respectively provided with a guide groove, and the first support guide unit (101) is a guide wheel (533) capable of rotating in the guide groove.

10. A welding device for welding inside a pipe according to claim 1, characterized in that said first driving mechanism comprises a welding driving motor arranged at the bottom of the welding mechanism, and a first gear wheel meshed with a rack (31) arranged at the side of the first supporting mechanism (11) is arranged at the driving end of said welding driving motor.