CN107671487B - Multistage adjustable grounding brush - Google Patents
Multistage adjustable grounding brush Download PDFInfo
- Publication number
- CN107671487B CN107671487B CN201711083536.4A CN201711083536A CN107671487B CN 107671487 B CN107671487 B CN 107671487B CN 201711083536 A CN201711083536 A CN 201711083536A CN 107671487 B CN107671487 B CN 107671487B
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- grounding brush
- grounding
- steel pipe
- assembly
- rotating arm
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 61
- 239000010959 steel Substances 0.000 claims abstract description 61
- 238000003466 welding Methods 0.000 claims abstract description 31
- 230000009471 action Effects 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 230000000712 assembly Effects 0.000 abstract description 5
- 238000000429 assembly Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Coating Apparatus (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A multistage adjustable grounding brush comprises an axial sliding base, a radial sliding supporting seat, a connecting rotating arm and a grounding brush assembly; the axial sliding base is arranged on the frame through a linear chute which is horizontally arranged; the radial sliding support seat is arranged above the axial sliding base; the connecting rotating arm is connected with the radial sliding supporting seat through a connecting shaft and comprises telescopic devices and linear positioning assemblies which are arranged in a staggered manner; the grounding brush assembly and the connecting rotating arm are connected to the telescopic ends of the telescopic device and the linear positioning assembly. The multistage adjustable grounding brush is characterized in that the grounding brush head is attached to the surface of a welded steel pipe, the position of the grounding brush head can be adjusted according to steel pipes with different outer diameter sizes, the attaching force of the grounding brush head can be automatically adjusted according to different wall thicknesses, and the welding quality is improved and meanwhile the grounding brush head is applicable to welding of steel pipes with different sizes.
Description
Technical Field
The invention relates to the field of steel pipe welding, in particular to a multistage adjustable grounding brush.
Background
The oil gas long-distance pipeline is increasingly developed towards the directions of high strength and large caliber, and the quality of welding is an important factor affecting whether the pipeline can safely run. In order to ensure the stability of the quality of the welding seam, the welding position is fixed, the steel pipe is welded in a rotating way, and the grounding wire-bonding way of the welding seam is provided with a new challenge in the rotating welding way of the steel pipe. Particularly for steel pipes with large wall thickness, a large current is required to improve welding penetration, and the problems of falling off of grounding, virtual overlapping and the like can seriously affect the quality of welded parts of the steel pipes.
The patent with publication number of CN202772275U discloses a steel pipe welding multi-winding-prevention grounding device, which improves the welding quality of the steel pipes with fixed sizes to a certain extent, but the steel pipes with different outer diameter sizes and different wall thicknesses need to be designed independently, the replacement process is inconvenient, and the welding universality is poor.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the multistage adjustable grounding brush, which is characterized in that the grounding brush head with a specific structure is attached to the surface of a welded steel pipe, the position of the brush head can be adjusted according to the steel pipes with different outer diameter sizes, the attaching force of the grounding brush head can be automatically adjusted according to different wall thicknesses, and the welding quality is improved and the multistage adjustable grounding brush is applicable to welding of the steel pipes with different sizes.
The specific technical scheme of the invention is as follows: a multistage adjustable grounding brush comprises an axial sliding base, a radial sliding supporting seat, a connecting rotating arm and a grounding brush assembly;
the axial sliding base is arranged on the frame through a linear chute which is horizontally arranged, has the action of moving along the axis direction of the welded steel pipe, and can axially adjust the multistage adjustable grounding brush to be close to a welding position;
the radial sliding support seat is arranged above the axial sliding base and is provided with a horizontal movement motion perpendicular to the axis direction of the welded steel pipe;
the connecting rotating arm is connected with the radial sliding supporting seat through a connecting shaft and is provided with a rotating action of which the axle center is parallel to the axis of the welded steel pipe, and the connecting rotating arm comprises a telescopic device and a linear positioning assembly which are arranged in a staggered manner;
the grounding brush assembly and the connecting rotating arm are connected to the telescopic ends of the telescopic device and the linear positioning assembly, and the telescopic action of the telescopic device drives the grounding brush assembly to linearly move.
As preferable mode of the invention, the grounding brush assembly comprises a support, a connecting arm and a grounding brush, wherein one ends of two groups of connecting arms are symmetrically hinged to the support, and the grounding brush is connected to the other ends of the connecting arms;
the grounding brush assembly further comprises an angle adjusting assembly, wherein the angle adjusting assembly is connected between the support and the connecting arm and is provided with an action of adjusting the angle of the connecting arm.
Preferably, the angle adjusting assembly comprises an adjusting screw, a connecting block and a connecting rod; one end of the adjusting screw is connected to the support and is provided with a rotating adjusting action under the action of external force; the connecting block is provided with an internal thread matched with the adjusting screw rod and is arranged on the adjusting screw rod; one end of the connecting rod is hinged to the connecting block, the other end of the connecting rod is hinged to the connecting arm, and the connecting rods are symmetrically arranged at two ends of the connecting block.
Preferably, the radial sliding support seat comprises a transition support seat and a top layer support seat, wherein the transition support seat is connected with the axial sliding base through a linear chute and a cylinder, and the top layer support seat is connected with the transition support seat through the linear chute and the cylinder.
Preferably, a manual speed reducer is arranged at one end of the connecting shaft of the connecting rotating arm and the radial sliding supporting seat.
As the optimization of the invention, the telescopic device is a symmetrically arranged cylinder or oil cylinder, and the telescopic device is communicated with a rodless cavity vent pipe or a vent pipe; the linear positioning components are symmetrically arranged.
Preferably, the grounding brush comprises a contact surface which is contacted with the welded steel pipe, the grounding brush is bound into a round table shape by a plurality of bent copper wires, and the contact surface is a large bottom surface of the round table.
Preferably, the telescopic device is connected with a voltage regulating device, and the voltage regulating device regulates the pressure to be related to the electric welding current.
Preferably, the greater the pressure of the expansion device, the closer the grounding brush is to the outer surface of the welded steel pipe, and the larger the contact area between the contact surface and the outer surface of the welded steel pipe.
As the preferable mode of the invention, the connection process of the multistage adjustable grounding brush and the welded steel pipe is completed by firstly adjusting the radial sliding supporting seat to move with the connecting rotating arm so that the grounding brush is just contacted with the outer surface of the welded steel pipe, and then controlling the telescopic device to give a certain thrust to the grounding brush.
In summary, the invention has the following beneficial effects:
the multistage adjustable grounding brush is characterized in that the grounding brush head is attached to the surface of a welded steel pipe, the position of the grounding brush head can be adjusted according to steel pipes with different outer diameter sizes, the attaching force of the grounding brush head can be automatically adjusted according to different wall thicknesses, and the welding quality is improved and meanwhile the grounding brush head is applicable to welding of steel pipes with different sizes.
Drawings
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a top view of an embodiment of the present invention;
FIG. 3 is a diagram showing a welded state of a grounding brush to a steel pipe having a relatively thin wall thickness according to an embodiment of the present invention;
FIG. 4 is a diagram showing a welded state of a grounding brush to a steel pipe having a thicker wall thickness according to an embodiment of the present invention;
in the figure, a 1-axial sliding base, a 2-radial sliding supporting seat, a 2-1-transition supporting seat, a 2-2-top supporting seat, a 3-connecting rotating arm, a 3-1-telescopic device, a 3-2-linear positioning assembly, a 3-3-manual speed reducer, a 4-grounding brush assembly, a 4-1-supporting seat, a 4-2-connecting arm, a 4-3-grounding brush, a 4-3-1-contact surface, a 4-4-angle adjusting assembly, a 4-4-1-adjusting screw, a 4-4-2-connecting block and a 4-4-3-connecting rod are arranged on the base.
Detailed Description
The invention will be further illustrated by the following examples in conjunction with the accompanying drawings.
Referring to fig. 1 and 2, a multistage adjustable grounding brush comprises an axial sliding base 1, a radial sliding supporting seat 2, a connecting rotating arm 3 and a grounding brush assembly 4;
the axial sliding base 1 is arranged on the frame through a linear chute which is horizontally arranged, has the action of moving along the axis direction of the welded steel pipe, and can axially adjust the multistage adjustable grounding brush to be close to a welding part;
the radial sliding support seat 2 is arranged above the axial sliding base 1 and is provided with a horizontal movement motion perpendicular to the axis direction of the welded steel pipe;
the connecting rotating arm 3 is connected with the radial sliding supporting seat 2 through a connecting shaft, and is provided with a rotating action that the axle center is parallel to the axis of the welded steel pipe, and the connecting rotating arm 3 comprises a telescopic device 3-1 and a linear positioning assembly 3-2 which are arranged in a staggered manner;
the grounding brush assembly 4 and the connecting rotating arm 3 are connected to the telescopic ends of the telescopic device 3-1 and the linear positioning assembly 3-2, and the telescopic action of the telescopic device 3-1 drives the grounding brush assembly 4 to linearly move.
As shown in fig. 1 and 2, the grounding brush assembly 4 comprises a support 4-1, connecting arms 4-2 and grounding brushes 4-3, wherein one ends of the two groups of connecting arms 4-2 are symmetrically hinged to the support 4-1, and the grounding brushes 4-3 are connected to the other ends of the connecting arms 4-2;
the grounding brush assembly 4 further comprises an angle adjusting assembly 4-4, wherein the angle adjusting assembly 4-4 is connected between the support 4-1 and the connecting arm 4-2, and the action of adjusting the angle of the connecting arm 4-2 is provided.
The grounding brush 4-3 is opposite to the axis of the welded steel pipe in an optimal grounding mode, the larger the diameter of the welded steel pipe is, the smaller the included angle between the two groups of connecting arms 4-2 is, and the grounding brush 4-3 can be opposite to the axis of the welded steel pipe by adjusting the angle of the connecting arms 4-2.
As shown in fig. 1 and 2, the angle adjusting assembly 4-4 comprises an adjusting screw 4-4-1, a connecting block 4-4-2 and a connecting rod 4-4-3;
one end of an adjusting screw 4-4-1 is connected to the support 4-1, and has rotary adjusting action under the action of external force;
the connecting block 4-4-2 is provided with internal threads matched with the adjusting screw 4-4-1 and is arranged on the adjusting screw 4-4-1;
one end of the connecting rod 4-4-3 is hinged on the connecting block 4-4-2, the other end is hinged on the connecting arm 4-2, and the connecting rod 4-4-3 is symmetrically arranged at two ends of the connecting block 4-4-2.
The adjusting screw 4-4-1 is clamped on the support 4-1 and cannot axially move, the adjusting screw 4-4-1 is rotated, the connecting block 4-4-2 in threaded fit moves in the axial direction of the adjusting screw 4-4-1, the connecting block 4-4-2 and the connecting rod 4-3 form a connecting rod sliding block mechanism, the connecting rod 4-4-3 is driven to move by translation of the connecting block 4-4-2, and then the connecting arm 4-2 is driven to rotate so as to adjust the direction of the grounding brush 4-3, and the grounding brush 4-3 is adjusted to be opposite to the axis of the welded steel pipe.
As shown in fig. 1 and 2, the radial sliding support seat 2 comprises a transition support seat 2-1 and a top layer support seat 2-2, the transition support seat 2-1 is connected with the axial sliding base 1 through a linear chute and a cylinder, and the top layer support seat 2-2 is connected with the transition support seat 2-1 through the linear chute and the cylinder.
The cylinder stretches to enable the transition supporting seat 2-1 and the top supporting seat 2-2 to do linear motion in the direction approaching to or far from the welded steel pipe; the displacement of the radial sliding support seat 2 can be increased by arranging the transition support seat 2-1, and the transition support seat 2-1 can be increased or cancelled according to the actual welding position of the welded steel pipes of the production line.
As shown in fig. 1 and 2, a manual speed reducer 3-3 is arranged at one end of the connecting shaft connecting the rotating arm 3 and the radial sliding supporting seat 2.
The larger the outer circle of the welded steel pipe is, the higher the height of the outer circle is, the smaller the height of the outer circle is, the connecting rotating arm 3 is adjusted to be in an optimal state in the direction opposite to the axis of the welded steel pipe, and the connecting rotating arm 3 can be driven to rotate up and down by rotating the handle of the manual speed reducer 3-3 by taking the connecting shaft as the axis, so that the connecting rotating arm 3 is adjusted to be opposite to the axis of the welded steel pipe.
As shown in fig. 2, the telescopic device 3-1 is a symmetrically arranged cylinder or oil cylinder, and the telescopic device 3-1 is communicated with a rodless cavity vent pipe or a vent pipe; the linear positioning assemblies 3-2 are symmetrically arranged.
The telescopic devices 3-1 are symmetrically arranged, the ventilation pipes or the oil pipes are communicated, the grounding brush assemblies 4 are uniformly stressed, the linear positioning assemblies 3-2 are arranged, the grounding brush assemblies 4 can always move parallel to the axis of the welded steel pipe, each grounding brush 4-3 can be attached to the surface of the welded steel pipe, and virtual connection or disconnection of a certain grounding brush 4-3 cannot be caused.
As shown in fig. 1, 2, 3 and 4, the grounding brush 4-3 comprises a contact surface 4-3-1 contacted with the welded steel pipe, the grounding brush 4-3 is bundled into a round table shape by a large number of bent copper wires, and the contact surface 4-3-1 is a large bottom surface of the round table.
The contact surface 4-3-1 is composed of the peaks of a large number of copper wires, the outer surface of the welded steel pipe is non-planar, when the contact surface 4-3-1 is contacted with the outer surface of the welded steel pipe, a small number of peaks of the copper wires are contacted firstly, the contacted copper wires give resistance to continuous contact between other copper wires and the outer surface of the welded steel pipe, the contacted copper wires can be bent and deformed more easily by using the bent copper wires, the resistance is reduced, and as many copper wires as possible are contacted with the outer surface of the welded steel pipe, and the current through flow is increased.
As shown in fig. 2, the telescopic device 3-1 is connected with a voltage regulating device, and the voltage regulating device regulates the pressure to be related to the electric welding current.
When the telescopic device 3-1 is a cylinder, the pressure regulating equipment can be an air compressor pressure controller or a pressure regulating valve; when the telescopic device 3-1 is an oil cylinder, the pressure regulating device can be a proportional overflow valve.
As shown in fig. 3 and 4, the larger the pressure of the expansion device 3-1 is, the closer the grounding brush 4-3 is to the outer surface of the welded steel pipe, and the larger the contact area between the contact surface 4-3-1 and the outer surface of the welded steel pipe is.
The welding of the steel pipe with the thicker wall thickness requires larger electric welding penetration, larger electric welding penetration requires larger electric welding current, and the bottleneck of the current flux is the contact area of the grounding part, so that the contact area between the contact surface 4-3-1 and the outer surface of the welded steel pipe is increased, the air holes, welding slag and the like at the welding part can be effectively reduced, and the welding quality is improved; by increasing the pressure of the telescopic device 3-1, the bending degree of the copper wires at the middle part of the grounding brush 4-3 is increased, the copper wires at the surrounding part are inclined outwards, more copper wire cylindrical surfaces are in contact with the surface of the welded steel pipe, and the contact area of the contact surface 4-3-1 and the outer surface of the welded steel pipe is greatly increased.
As shown in fig. 1 and 2, the connection process of the multistage adjustable grounding brush and the welded steel pipe is completed by adjusting the radial sliding supporting seat 2 and the connecting rotating arm 3 to move so that the grounding brush 4-3 just contacts with the outer surface of the welded steel pipe, and then controlling the telescopic device 3-1 to give a certain thrust to the grounding brush 4-3.
The radial sliding supporting seat 2 and the connecting rotating arm 3 are adjusted firstly, so that the grounding brush 4-3 can be positioned at a better grounding position and gesture, then the telescopic device 3-1 is controlled to push out, the stroke of the telescopic device 3-1 can be completely used for approaching the grounding brush 4-3 to the welding steel pipe, and the contact area of the contact surface 4-3-1 and the outer surface of the welding steel pipe is increased to the greatest extent.
The above examples are only illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical scheme of the present invention will fall within the protection scope of the present invention without departing from the design concept of the present invention, and the technical content of the present invention is fully described in the claims.
Claims (6)
1. A multistage adjustable grounding brush which is characterized in that: comprises an axial sliding base (1), a radial sliding supporting seat (2), a connecting rotating arm (3) and a grounding brush assembly (4);
the axial sliding base (1) is arranged on the frame through a linear chute which is horizontally arranged;
the radial sliding support seat (2) is arranged above the axial sliding base (1);
the connecting rotating arm (3) is connected with the radial sliding supporting seat (2) through a connecting shaft, and the connecting rotating arm (3) comprises a telescopic device (3-1) and a linear positioning assembly (3-2) which are arranged in a staggered mode;
the grounding brush assembly (4) is connected with the telescopic end of the telescopic device (3-1) and the telescopic end of the linear positioning assembly (3-2) between the connecting rotating arm (3); the grounding brush assembly (4) comprises a support (4-1), connecting arms (4-2) and grounding brushes (4-3), one ends of the two groups of connecting arms (4-2) are symmetrically hinged to the support (4-1), and the grounding brushes (4-3) are connected to the other ends of the connecting arms (4-2);
the grounding brush assembly (4) further comprises an angle adjusting assembly (4-4), wherein the angle adjusting assembly (4-4) is connected between the support (4-1) and the connecting arm (4-2) and is provided with an action of adjusting the angle of the connecting arm (4-2);
the grounding brush (4-3) comprises a contact surface (4-3-1) which is contacted with the welded steel pipe, the grounding brush (4-3) is bundled into a round table shape by a large number of bent copper wires, and the contact surface (4-3-1) is a large bottom surface of the round table;
the telescopic device (3-1) is connected with voltage regulating equipment, and the voltage regulating equipment regulates the pressure to be related to the electric welding current;
the radial sliding support seat (2) comprises a transition support seat (2-1) and a top layer support seat (2-2), the transition support seat (2-1) is connected with the axial sliding base (1) through a linear chute and a cylinder, and the top layer support seat (2-2) is connected with the transition support seat (2-1) through the linear chute and the cylinder.
2. A multistage adjustable grounding brush according to claim 1, characterized in that: the angle adjusting assembly (4-4) comprises an adjusting screw (4-4-1), a connecting block (4-4-2) and a connecting rod (4-4-3);
one end of the adjusting screw rod (4-4-1) is connected to the support (4-1) and is provided with a rotary adjusting action under the action of external force;
the connecting block (4-4-2) is provided with internal threads matched with the adjusting screw (4-4-1) and is arranged on the adjusting screw (4-4-1);
one end of the connecting rod (4-4-3) is hinged to the connecting block (4-4-2), the other end of the connecting rod is hinged to the connecting arm (4-2), and the connecting rod (4-4-3) is symmetrically arranged at two ends of the connecting block (4-4-2).
3. A multistage adjustable grounding brush according to claim 1, characterized in that: one end of the connecting shaft of the connecting rotating arm (3) and the radial sliding supporting seat (2) is provided with a manual speed reducer (3-3).
4. A multistage adjustable grounding brush according to claim 1, characterized in that: the telescopic device (3-1) is a symmetrically arranged cylinder or oil cylinder, and the telescopic device (3-1) is communicated with a rodless cavity vent pipe or a vent pipe; the linear positioning components (3-2) are symmetrically arranged.
5. A multistage adjustable grounding brush according to claim 1, characterized in that: the larger the pressure of the telescopic device (3-1), the closer the grounding brush (4-3) is to the outer surface of the welded steel pipe, and the larger the contact area of the contact surface (4-3-1) to the outer surface of the welded steel pipe.
6. A multistage adjustable grounding brush according to claim 1, characterized in that: the multistage adjustable grounding brush is connected with the welded steel pipe, the radial sliding supporting seat (2) and the connecting rotating arm (3) are adjusted to move so that the grounding brush (4-3) is just contacted with the outer surface of the welded steel pipe, and then the telescopic device (3-1) is controlled to give a certain thrust to the grounding brush (4-3) to finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711083536.4A CN107671487B (en) | 2017-11-07 | 2017-11-07 | Multistage adjustable grounding brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711083536.4A CN107671487B (en) | 2017-11-07 | 2017-11-07 | Multistage adjustable grounding brush |
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| Publication Number | Publication Date |
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| CN107671487A CN107671487A (en) | 2018-02-09 |
| CN107671487B true CN107671487B (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711083536.4A Active CN107671487B (en) | 2017-11-07 | 2017-11-07 | Multistage adjustable grounding brush |
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| CN (1) | CN107671487B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112705430B (en) * | 2021-01-18 | 2022-09-09 | 泰州祥福工程装备有限公司 | Automatic coating robot for steel pipes |
| CN113889780B (en) * | 2021-11-22 | 2024-06-11 | 中建五洲工程装备有限公司 | Portable modularized large-diameter shell ring multi-station automatic welding grounding device |
| CN115194357B (en) * | 2022-09-16 | 2022-11-29 | 徐州智博机车有限公司 | Two-way welding device for motorcycle exhaust pipe |
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| CN204011757U (en) * | 2014-06-16 | 2014-12-10 | 番禺珠江钢管（珠海）有限公司 | SAW process for straight welded steel pipe ground wire self adaptation contact mechanism |
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| CN105665982A (en) * | 2016-04-22 | 2016-06-15 | 江苏巨鑫石油钢管有限公司 | Welding platform for large-diameter steel pipe |
| CN106192859A (en) * | 2016-07-28 | 2016-12-07 | 沈阳德恒机械制造有限公司 | A kind of high speed heavy-duty machinery sweeps away snow equipment and control method |
| CN207656180U (en) * | 2017-11-07 | 2018-07-27 | 浙江金洲管道工业有限公司 | A kind of adjustable earthed brush of multistage |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0539769U (en) * | 1991-11-05 | 1993-05-28 | 日本鋼管株式会社 | Pipe circumference welding earth current collector |
| CN2135422Y (en) * | 1992-08-14 | 1993-06-09 | 卢晋级 | Contact type welding grounding device |
| CN202212713U (en) * | 2011-07-19 | 2012-05-09 | 中国石油集团渤海石油装备制造有限公司 | Refined welding grounding device for spirally submerged arc welding pipes |
| CN103733445A (en) * | 2011-08-16 | 2014-04-16 | 迪纳摩博斯特法布里肯公司 | Contact brush holder |
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| CN204011757U (en) * | 2014-06-16 | 2014-12-10 | 番禺珠江钢管（珠海）有限公司 | SAW process for straight welded steel pipe ground wire self adaptation contact mechanism |
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| CN105665982A (en) * | 2016-04-22 | 2016-06-15 | 江苏巨鑫石油钢管有限公司 | Welding platform for large-diameter steel pipe |
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| Publication number | Publication date |
|---|---|
| CN107671487A (en) | 2018-02-09 |
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Address after: 313000 No. 288 Funan Road, Wuxing District, Huzhou City, Zhejiang Province Applicant after: ZHEJIANG KINGLAND & PIPELINE TECHNOLOGIES Co.,Ltd. Address before: 313000 Yangjiabu, Huzhou Economic and Technological Development Zone, Huzhou City, Zhejiang Province Applicant before: ZHEJIANG KINGLAND & PIPELINE TECHNOLOGIES Co.,Ltd. |
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