CN213753090U

CN213753090U - Rotatory steel pipe girth welding motionless formula earth wire device

Info

Publication number: CN213753090U
Application number: CN202022860597.0U
Authority: CN
Inventors: 蒋军; 武月龙; 邢世江; 吴振华
Original assignee: Shenzhen Chiwan Sembawang Engineering Co ltd
Current assignee: Shenzhen Chiwan Sembawang Engineering Co ltd
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2021-07-20
Anticipated expiration: 2030-12-02

Abstract

The utility model relates to a rotary steel pipe girth welding immovable ground wire device, which comprises a clamping component, a telescopic component, a contact component and a conductive component; the clamping assembly is connected with the contact assembly through a telescopic assembly; the conductive component is arranged on the contact component and is in surface contact with the contact component; the contact component can freely rotate relative to the conductive component; the clamping assembly is clamped on the steel pipe and is grounded through the telescopic assembly, the contact assembly and the conductive assembly, the contact assembly can freely rotate relative to the conductive assembly and is in tight contact with the conductive assembly in the steel pipe girth welding process, the grounding effect is stable, electric sparks are not prone to occurring, the problems that in the existing method, the electric wire is wound, the electric sparks injure the steel pipe are solved, even if the electric sparks are generated, the electric sparks only occur between the conductive assembly and the contact assembly, and the welded steel pipe cannot be injured; the structure is simple, and the operation is convenient; low cost, long service life and low cost.

Description

Rotatory steel pipe girth welding motionless formula earth wire device

Technical Field

The utility model relates to a steel pipe girth welding field, more specifically say, relate to a rotatory steel pipe girth welding motionless formula earth wire device.

Background

In the fields of ocean engineering, pipeline manufacturing and the like, the method relates to a large number of steel pipe group lengthening operations. The most common welding method is realized by keeping the welding gun head still and rotating the steel pipe at uniform speed. In the welding process, the steel pipe must be grounded, and the most common clamp type grounding wire device is easy to have the phenomena of cable winding, clamp falling, unstable current, easy occurrence of electric sparks and the like in the rotating process of the steel pipe, so that the welding quality is influenced.

At present, a novel grounding method is provided, which adopts a lever type principle and places a self-adaptive grounding device at the bottom of a steel pipe. For example, chinese patent (CN209062406U) discloses a steel pipe girth welding self-adaptive ground wire device, which adopts the lever principle, so that the conductor can be always in contact when the steel pipe rotates, and the length and height of the lever can be adjusted by the fulcrum and the through hole on the lever, thereby effectively ensuring uninterrupted contact between the lever and the conductor. Although the method solves the problems of cable winding and jaw replacement, the phenomenon of electric sparks is still generated occasionally and is unavoidable, and the steel pipe is easy to damage.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a rotatory steel pipe girth welding motionless formula earth wire device that simple and practical, low in cost, operation in-process earthing position are unchangeable all the time.

The utility model provides a technical scheme that its technical problem adopted is:

the rotary steel pipe girth welding immovable grounding wire device comprises a clamping assembly, a telescopic assembly, a contact assembly and a conductive assembly; the clamping assembly is connected with the contact assembly through the telescopic assembly; the conductive component is arranged on the contact component and is in surface contact with the contact component; the contact assembly is free to rotate relative to the conductive assembly.

Further, the contact assembly is a round tube; a first stop block and a second stop block positioned on the side edge of the first stop block are arranged on the side wall of the circular tube; the first stop block and the second stop block form a placing groove in a surrounding mode; the conductive component is arranged in the placing groove; the telescopic assembly is connected with the circular tube.

Furthermore, the conductive assembly comprises conductive rods and clamping pieces which are symmetrically arranged along the longitudinal central line of the circular tube; the clamping piece is arranged on the conductive rod; one end of the conductive rod is arranged in the placing groove; the clamping pieces are connected through the connecting pieces.

Further, the clamping piece comprises clamps symmetrically arranged along the central axis of the current-conducting rod; the clamp is provided with a concave position; the conductive rod is arranged in the concave position; the clamps are connected through screws in a locking mode, and the conducting rods are fastened.

Further, the conductive assembly further comprises a ground cable; the connecting piece is arranged at one end of the clamp; the grounding cable is arranged at the other end of the clamp.

Further, the telescopic assembly comprises an outer pipe, an inner pipe arranged in the outer pipe, and an adjusting piece arranged on the side wall of the outer pipe; the inner tube is slidable relative to the outer tube; the inner pipe is connected with the circular pipe; the outer tube is connected with the clamping assembly.

Further, the clamping assembly includes a mounting block; the outer pipe is non-detachably connected to the mounting block; and the mounting block is provided with a mounting hole.

Further, the conductive rod is a carbon rod.

The beneficial effects of the utility model reside in that: the clamping assembly is clamped on the steel pipe and is grounded through the telescopic assembly, the contact assembly and the conductive assembly, the contact assembly can freely rotate relative to the conductive assembly and is in tight contact with the conductive assembly in the steel pipe girth welding process, the grounding effect is stable, electric sparks are not prone to occurring, the problems that in the existing method, the electric wire is wound, the electric sparks injure the steel pipe are solved, even if the electric sparks are generated, the electric sparks only occur between the conductive assembly and the contact assembly, and the welded steel pipe cannot be injured; the structure is simple, and the operation is convenient; low cost, long service life and low cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:

fig. 1 is a schematic structural diagram of a rotary steel pipe girth welding immovable ground wire device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a clamp according to an embodiment of the present invention;

fig. 3 is a schematic view of a combination structure of the clamping assembly, the telescopic assembly and the contact assembly according to an embodiment of the present invention;

fig. 4 is a first usage state diagram of a rotary steel pipe girth welding immovable ground wire device according to an embodiment of the present invention;

fig. 5 is a second usage state diagram of the stationary ground wire apparatus for rotary steel pipe girth welding according to an embodiment of the present invention.

In the figure, 5, steel pipe; 11. mounting blocks; 12. mounting holes; 21. an outer tube; 22. an inner tube; 23. an adjustment member; 31. a circular tube; 32. a first stopper; 33. a second stopper; 34. a placement groove; 41. a conductive rod; 42. a clamp; 43. a concave position; 44. a ground cable; 45. and (7) connecting the sheets.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

The utility model provides a rotary steel pipe girth welding immovable ground wire device, as shown in figures 1 to 5, comprising a clamping component, a telescopic component, a contact component and a conductive component; the clamping assembly is connected with the contact assembly through a telescopic assembly; the conductive component is arranged on the contact component and is in surface contact with the contact component; the contact assembly is free to rotate relative to the conductive assembly.

When the device is used, the clamping assembly is clamped at one end of the steel pipe 5, the telescopic assembly adjusts the position of the contact assembly, and the position of a butt joint place is adjusted. The conductive member is brought into close contact and friction with the contact member by its own weight. During girth welding of the steel pipe 5, the contact assembly can freely rotate relative to the conductive assembly and is kept in close contact with the conductive assembly, and during rotation of the steel pipe 5, the positions of the contact assembly and the conductive assembly relative to the ground are kept unchanged.

By adopting the scheme, the grounding effect is stable, electric sparks are not easy to occur, the problems that the electric wire is wound and the electric sparks injure the steel pipe 5 in the existing method are solved, even if the electric sparks are generated, the electric sparks only occur between the conductive assembly and the contact assembly, and the welded steel pipe 5 is not injured; the structure is simple, and the operation is convenient; low cost, long service life and low cost.

In a further embodiment, the contact assembly is a round tube 31; a first stop 32 and a second stop 33 positioned at the side edge of the first stop 32 are arranged on the side wall of the round tube 31; the first block 32 and the second block 33 enclose a placing groove 34; the conductive member is disposed in the placement groove 34; the telescoping assembly is connected to the tube 31. The round pipe 31 is a steel round pipe, the first stopper 32 and the second stopper 33 are arranged in front and at the back, and the placing groove 34 is positioned between the first stopper 32 and the second stopper 33; the conductive member is placed in the placement groove 34 and is limited by the first stopper 32 and the second stopper 33.

In a further embodiment, the conductive assembly comprises conductive rods 41 and clamping members symmetrically arranged along the longitudinal center line of the circular tube 31; the clamping piece is arranged on the conductive rod 41; one end of the conductive rod 41 is arranged in the placing groove 34 and is contacted with the side wall of the round tube 31; the clamping members are connected by a connecting piece 45.

In a further embodiment, the clamping members comprise clamps 42 arranged symmetrically along the axis of the collector bar 41; the clamp 42 is provided with a concave position 43; the conductive rod 41 is arranged in the concave position 43; the clamps 42 are connected by screws in a locking manner, and the conductive rods 41 are fastened.

In a further embodiment, the conductive assembly further comprises a ground cable 44; the connecting piece 45 is arranged at one end of the clamp 42; a ground cable 44 is provided at the other end of the clamp 42.

In the above embodiment, the holding member is formed by combining two holders 42, the conductive rod 41 is placed in the recess 43 of one holder 42, and the other holder 42 is covered and fastened by a screw to hold the conductive rod 41. The clamp 42 is a copper clamp and the connecting piece 45 is a copper connecting piece. The conductive rod 41 and the clamp 42 on each side are respectively combined and clamped, and screws sequentially penetrate through the connecting sheet 45 and the two combined clamps 42 to realize locking, and two ends of the connecting sheet 45 are respectively connected with the clamps 42 symmetrically distributed on two sides of the circular tube 31. The end of the clamp 42 on the two sides opposite to the end connected with the connecting sheet 45 sequentially passes through the grounding cable 44 and the two combined clamps 42 through screws to realize locking, wherein the conductive rod 41, the clamp 42 and the connecting sheet 45 form a conductive carbon rod group and are in close contact with the circular tube 31 through self gravity. In the process of girth welding of the steel pipe 5, the round pipe 31 can freely rotate relative to the conductive carbon rod group and is tightly contacted, the grounding effect is stable, electric sparks are not easy to occur, the problems that a conductive wire is wound and the electric sparks damage the steel pipe 5 in the existing method are solved, even if the electric sparks are generated, the electric sparks only occur between the conductive rod 41 and the round pipe 31, and the welded steel pipe 5 cannot be damaged; the structure is simple, and the operation is convenient; low cost, long service life and low cost.

In a further embodiment, the telescopic assembly comprises an outer tube 21, an inner tube 22 disposed in the outer tube 21, and an adjustment member 23 disposed on a side wall of the outer tube 21; the inner tube 22 is slidable relative to the outer tube 21; the inner tube 22 is connected with the circular tube 31; the outer tube 21 is connected to a clamping assembly. The adjusting member 23 is a screw which penetrates into the outer tube 21. During adjustment, the screw is rotated to move in a direction away from the inside of the outer tube 21, the screw is moved away from the inner tube 22, the inner tube 22 can slide relative to the outer tube 21, the position of the inner tube 22 is adjusted according to a desired length, the screw is reversed to move in a direction toward the inside of the outer tube 21, and the screw is fixed to the side wall of the inner tube 22, thereby fixing the position of the inner tube 22. The inner tube 22 is fixedly connected to the circular tube 31, and when the steel tube 5 rotates, the outer tube 21 and the inner tube 22 drive the circular tube 31 to rotate.

In the above embodiment, the inner tube 22 and the outer tube 21 are made of steel.

In a further embodiment, the clamping assembly comprises a mounting block 11; the outer tube 21 is non-detachably connected to the mounting block 11; the mounting block 11 has a mounting hole 12 therein. The mounting hole 12 is arranged at one end of the steel pipe 5 to be welded, the pipe wall of the steel pipe 5 is inserted into the mounting hole 12, and if the mounting hole 12 is larger than the thickness of the steel pipe 5, tools such as a chisel can be superposed to enable the mounting block 11 to be firmly clamped on the steel pipe 5.

In a further embodiment, the conductive rod 41 is a carbon rod. The carbon rod is smooth and has a small friction coefficient with the circular tube 31, and when the circular tube 31 rotates along with the rotation of the steel tube 5, the conductive carbon rod group can keep the position relative to the ground unchanged under the weight of the conductive carbon rod group and the grounding cable 44. Further, when the device is used for the first time, a carbon rod can be used for coating a circle on the circular tube 31, and the contact effect is better.

In the above embodiment, the use steps of the motionless ground wire device for girth welding of the rotating steel pipe are as follows: the mounting block 11 is mounted on the end of the steel pipe 5, and the adjusting piece 23 is adjusted to adjust the position of the inner pipe 22 so that the center of the circular pipe 31 can be approximately overlapped with the center of the welded steel pipe 5. The conductive rod 41 is placed in a concave position 43 of the clamp 42 and locked with the clamp 42, one end of the clamp 42 is connected with the clamp 42 on the other side through a connecting sheet 45, and the other end of the clamp is respectively connected with a grounding cable 44 to assemble a conductive carbon rod group. After assembly, the conductive carbon rod groups are placed on the circular tube 31, and the conductive carbon rod groups are symmetrically arranged on two sides of the circular tube 31. And electrifying to realize grounding during girth welding of the rotating steel pipe 5. Wherein, the central axis of the conductive rod 41 forms an included angle with the longitudinal central line of the circular tube 31, and under the restraining action of the connecting sheet 45, the conductive rod 41 is pressed against the surface of the circular tube 31. So that the conductive carbon rod set hangs on the round tube 31. The problem that the conductive wire is wound in the original method is solved; the problem of electric spark damage to the base material is solved: the conductive carbon rod set is in close contact with the central circular tube 31 without interruption, the grounding effect is stable, and electric sparks are not easy to occur. Even if the electric spark is generated, the electric spark only occurs between the conductive rod 41 and the round pipe 31, and the welded steel pipe 5 is not damaged; the structure is simple, and the operation is convenient; low cost, long service life and low cost.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. The utility model provides a rotatory steel pipe girth welding motionless formula earth connection device which characterized in that: the device comprises a clamping component, a telescopic component, a contact component and a conductive component; the clamping assembly is connected with the contact assembly through the telescopic assembly; the conductive component is arranged on the contact component and is in surface contact with the contact component; the contact assembly is free to rotate relative to the conductive assembly.

2. The apparatus of claim 1, wherein the contact assembly is a circular tube; a first stop block and a second stop block positioned on the side edge of the first stop block are arranged on the side wall of the circular tube; the first stop block and the second stop block form a placing groove in a surrounding mode; the conductive component is arranged in the placing groove; the telescopic assembly is connected with the circular tube.

3. The rotary steel pipe girth welding immovable ground wire device according to claim 2, wherein the conductive assembly comprises conductive rods and clamping pieces symmetrically arranged along a longitudinal center line of the circular pipe; the clamping piece is arranged on the conductive rod; one end of the conductive rod is arranged in the placing groove; the clamping pieces are connected through connecting pieces.

4. The rotary steel pipe girth welding immovable ground wire apparatus according to claim 3, wherein the clamping member includes clamps symmetrically disposed along an axial line of the conductive rod; the clamp is provided with a concave position; the conductive rod is arranged in the concave position; the clamps are connected through screws in a locking mode, and the conducting rods are fastened.

5. The rotary steel pipe girth welding motionless ground wire apparatus of claim 4, wherein said conductive assembly further comprises a ground wire cable; the connecting piece is arranged at one end of the clamp; the grounding cable is arranged at the other end of the clamp.

6. The rotary steel pipe girth welding immovable ground wire apparatus of claim 2, wherein the telescopic assembly includes an outer pipe, an inner pipe disposed in the outer pipe, and an adjusting member disposed on a sidewall of the outer pipe; the inner tube is slidable relative to the outer tube; the inner pipe is connected with the circular pipe; the outer tube is connected with the clamping assembly.

7. The rotary steel pipe girth welding motionless ground wire apparatus of claim 6, wherein said clamping assembly comprises a mounting block; the outer pipe is non-detachably connected to the mounting block; and the mounting block is provided with a mounting hole.

8. The rotary steel pipe girth welding motionless type grounding wire device according to claim 3, wherein said conductive rod is a carbon rod.