CN213969618U - Butt welder for automatically butt-welding steel pipes - Google Patents
Butt welder for automatically butt-welding steel pipes Download PDFInfo
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- CN213969618U CN213969618U CN202022438125.6U CN202022438125U CN213969618U CN 213969618 U CN213969618 U CN 213969618U CN 202022438125 U CN202022438125 U CN 202022438125U CN 213969618 U CN213969618 U CN 213969618U
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Abstract
The utility model discloses a butt welding machine for automatically butt welding steel pipes, which comprises a base, a beam, a supporting structure, a welding gun device and a cleaning device, wherein the supporting structure is used for supporting and driving two steel pipes to be welded to rotate; the beam is fixed above the base; the supporting structure is arranged between the base and the cross beam, the central shafts of the two steel pipes to be welded are on the same straight line, and the central shafts of the two steel pipes to be welded are parallel to the axial direction of the cross beam; the welding gun device comprises a first moving block, a first electric telescopic rod and a welding gun, the cleaning device comprises a second moving block, a second electric telescopic rod and a cleaning brush, and the welding gun device and the cleaning device are respectively connected with the beam in an axial sliding mode and can be driven to reach the butt joint of two steel pipes to be welded. The utility model automatically cleans dust and rust at the butt joint and on the surface of two steel pipes to be welded, reduces the workload of manually cleaning dust and impurities at the end parts of the steel pipes, and avoids the injuries such as collision and the like in the manual cleaning process; and the butt welding effect and the butt welding quality are improved after automatic cleaning.
Description
Technical Field
The utility model relates to a steel pipe butt welding technical field that the construction was cuted, more specifically says, relates to an automatic butt welder of butt welding steel pipe.
Background
In the tunnel construction process, because the length of the steel pipe can not be determined in the purchasing process, the waste can not be avoided in the processing, and the steel pipe can not be used in a hundred percent, thereby causing the waste. In the process of stacking and collecting cut excess steel pipes, dust and rust are easily accumulated at the cut end of each steel pipe, butt welding connection between two steel pipes is influenced, the amount of work of manually cleaning dust and impurities at the end parts of the steel pipes is increased, and the steel pipes are easily collided by sharp end parts of the steel pipes to cause injury. Based on the problems, a steel pipe butt welding machine for automatically cleaning the end of the steel pipe needs to be designed.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.
The utility model also aims at providing a butt welding machine for automatically butt-welding steel pipes, which realizes the automatic cleaning of dust and rust at the butt joint and the surface of two steel pipes to be welded by arranging a cleaning device and a welding gun device which can move transversely and stretch longitudinally on a cross beam, reduces the workload of manually cleaning dust and impurities at the end part of the steel pipe, and avoids the injuries such as collision and the like in the manual cleaning process; and the utility model discloses be favorable to improving the butt welding effect after automatic cleaning, improve the butt welding quality of steel pipe.
In order to achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a butt welder for automatically butt-welding steel pipes, comprising:
a base;
the crossbeam is fixed above the base;
the supporting structure is used for supporting and driving the two steel pipes to be welded to rotate and is arranged between the base and the cross beam, the central shafts of the two steel pipes to be welded are on the same straight line, and the central shafts of the two steel pipes to be welded are parallel to the axial direction of the cross beam;
the welding gun device comprises a first moving block, a first electric telescopic rod and a welding gun, wherein the first moving block is connected with the beam in an axial sliding mode, the first electric telescopic rod is arranged on the first moving block, and the telescopic end of the first electric telescopic rod is provided with the welding gun for driving the gun head of the welding gun to reach and contact the butt joint of the two steel pipes to be welded;
cleaning device, it includes second motion piece, second electric telescopic handle and brush cleaner, the axial sliding connection of second motion piece and crossbeam, second electric telescopic handle sets up on the second motion piece, and the flexible end of second electric telescopic handle sets up the brush cleaner for the drive brush cleaner reaches and contradicts two butt joints of treating the welded steel pipe.
Preferably, the support structure comprises:
the central shafts of the first cylinder cavity and the second cylinder cavity are on the same straight line, and the diameters of the inner cavities of the first cylinder cavity and the second cylinder cavity are larger than the outer diameters of the steel pipes to be welded;
the four chucks are used for clamping two steel pipes to be welded and are respectively fixed with the first cylinder cavity and the second cylinder cavity, the four chucks are respectively arranged at two ends of the first cylinder cavity and two ends of the second cylinder cavity, and the four chucks are in the same straight line with the central axes of the first cylinder cavity and the second cylinder cavity;
the four supporting plates rotatably support the first cylinder cavity and the second cylinder cavity through bearings respectively;
and the gears at the output ends of the two variable-frequency speed-regulating motors are respectively meshed with the gears on the outer side walls of the first cylinder cavity and the second cylinder cavity.
Preferably, the crossbeam passes through the support frame to be fixed in the base top, be provided with the draw-in groove parallel with the axial on the crossbeam, first motion piece and second motion piece block are established on the draw-in groove respectively for the axial sliding connection of first motion piece and second motion piece and crossbeam.
Preferably, the first motion block and the second motion block are respectively provided with a buckle which is fixed and loosened with the cross beam.
Preferably, the inner walls of the jaws of the chuck are provided with rubber blocks.
Preferably, the first motion block and the second motion block are respectively provided with a laser indicator, the indication direction of the laser indicator of the first motion block is downward along the axial direction of the gun head of the welding gun, and the indication direction of the laser indicator of the second motion block is downward along the axial direction of the cleaning brush.
Preferably, the upper part of the cleaning brush is a cavity with an upper opening and a lower opening, the lower part of the cleaning brush is a hair body extending downwards or an arc-shaped hair body connected end to end, the hair body is arranged at a non-opening part at the lower end of the cavity and on the wall of the cavity, and the upper opening of the cavity is communicated with an air suction pipeline.
Preferably, the air draft pipeline comprises a vertical pipeline and a transverse pipeline, and the transverse pipeline is provided with a detachable magnet piece.
The utility model discloses at least, include following beneficial effect:
the utility model can automatically clean the dust and rust at the butt joint and on the surface of two steel pipes to be welded, reduce the workload of manually cleaning dust and impurities at the end parts of the steel pipes, and avoid the damages such as collision of sharp steel pipe end surfaces and the like in the manual cleaning process; and the utility model discloses be favorable to improving the butt welding effect after automatic cleaning, improve the butt welding quality of steel pipe.
Two, the utility model discloses a bearing structure is convenient for two and treats that the welded steel pipe wears to establish, fix and the adjustment butt joint is inseparable, and the installation of the steel pipe of being convenient for and welding machine is dismantled.
And thirdly, laser indicators are respectively arranged on the first motion block and the second motion block, so that the welding gun device and the cleaning device can conveniently find the position of the butt joint of the two steel pipes to be welded, and the welding gun device and the cleaning device can be conveniently adjusted.
And the cleaning brush is provided with an air suction pipeline, so that the cleaning effect of dust and rust at the butt joint part and on the surface of the two steel pipes to be welded can be improved.
And fifthly, the detachable magnet sheets are arranged on the transverse pipeline, so that the collection and the cleaning of the iron rust are facilitated.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of an implementation form of the present invention;
wherein the cross beam 10; a support frame 11; a card slot 12; a first motion block 13; a first electric telescopic rod 14; a torch head 15 of the welding torch; a laser pointer 16; a second motion block 17; a second electric telescopic rod 18; a cleaning brush 19; a base 20; a first support plate 21; a second support plate 22; a third support plate 23; a fourth support plate 24; a bearing 25; a variable frequency speed-regulating motor 26; a first gear 27; a second gear 28; a first chuck 29; a second chuck 30; a third chuck 31; a fourth chuck 32; a first cylindrical chamber 33; a second cylindrical chamber 34; the first steel pipe 41; a second steel tube 42.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "disposed" are to be construed broadly, and may for example be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Fig. 1 shows an implementation form of a butt welder for automatically butt-welding steel pipes, which includes: the welding device comprises a base 20, a cross beam 10, a supporting structure for supporting and driving two steel pipes to be welded to rotate, a welding gun device and a cleaning device;
the beam 10 is fixed above the base 20;
the supporting structure for supporting and driving the two steel pipes to be welded to rotate is arranged between the base 20 and the cross beam 10, the central shafts of the two steel pipes to be welded are on the same straight line, and the central shafts of the two steel pipes to be welded are parallel to the axial direction of the cross beam 10;
the welding gun device comprises a first moving block 13, a first electric telescopic rod 14 and a welding gun, wherein the first moving block 13 is connected with the beam 10 in an axial sliding mode, the first electric telescopic rod 14 is arranged on the first moving block 13, and the telescopic end of the first electric telescopic rod 14 is provided with the welding gun and used for driving a gun head 15 of the welding gun to reach and contact the butt joint of two steel pipes to be welded;
the cleaning device comprises a second moving block 17, a second electric telescopic rod 18 and a cleaning brush 19, the second moving block 17 is connected with the beam 10 in an axial sliding mode, the second electric telescopic rod 18 is arranged on the second moving block 17, and the cleaning brush 19 is arranged at the telescopic end of the second electric telescopic rod 18 and used for driving the cleaning brush 19 to reach and abut against the butt joint of two steel pipes to be welded.
When the utility model is used, two steel pipes to be welded are arranged on the supporting structure in a penetrating way, and two steel pipes to be welded are butted (a schematic butt joint diagram of a first steel pipe 41 and a second steel pipe 42 is shown in figure 1), then the cleaning device is moved to the position above the butt joint of the two steel pipes to be welded, the cleaning brush 19 is driven by the second electric telescopic rod 18 to reach and collide the butt joint of the two steel pipes to be welded, the driving piece of the supporting structure is started, the two steel pipes to be welded rotate at different speeds, and dust and rust on the butt joint and the surface of the two steel pipes to be welded are removed; after two steel pipes to be welded rotate at different speeds for cleaning for a period of time, the driving piece of the supporting structure is closed, the cleaning device is contracted and moved away from the butt joint of the two steel pipes to be welded, and the automatic cleaning of dust and rust on the butt joint and the surface of the two steel pipes to be welded is realized. And then, adjusting and tightly butting the two steel pipes to be welded, moving the welding gun device to reach the position above the butt joint of the two steel pipes to be welded, driving a welding gun head to reach and contact the butt joint of the two steel pipes to be welded through a first electric telescopic rod 14, and starting a driving piece of the supporting structure to enable the two steel pipes to be welded to synchronously rotate at the same speed so as to realize automatic butt welding.
On the basis of the above implementation form, the support structure of another technical solution includes: the device comprises a first cylinder cavity 33, a second cylinder cavity 34, four chucks, four supporting plates and two variable-frequency speed-regulating motors;
the first cylinder cavity 33 and the second cylinder cavity 34 are used for respectively penetrating two steel pipes to be welded, the central axes of the first cylinder cavity 33 and the second cylinder cavity 34 are on the same straight line, and the diameters of the inner cavities of the first cylinder cavity 33 and the second cylinder cavity 34 are larger than the outer diameters of the steel pipes to be welded;
the four chucks are respectively a first chuck 29, a second chuck 30, a third chuck 31 and a fourth chuck 32, are used for clamping two steel pipes to be welded and are respectively fixed with a first cylinder cavity 33 and a second cylinder cavity 34, are respectively arranged at two ends of the first cylinder cavity 33 and two ends of the second cylinder cavity 34, and are on the same straight line with the central axes of the first cylinder cavity 33 and the second cylinder cavity 34;
the four support plates are respectively a first support plate 21, a second support plate 22, a third support plate 23 and a fourth support plate 24, the first support plate 21 and the second support plate 22 rotatably support the first cylindrical cavity 33 through a bearing 25, and the third support plate 23 and the fourth support plate 24 rotatably support the second cylindrical cavity 34 through the bearing 25;
the two variable-frequency speed-regulating motors are used for driving the first cylindrical cavity 33 and the second cylindrical cavity 34 to rotate respectively, and gears at the output ends of the two variable-frequency speed-regulating motors are meshed with gears on the outer side walls of the first cylindrical cavity 33 and the second cylindrical cavity 34 respectively. The figure shows that a first gear 27 at the output end of one variable frequency speed regulating motor 26 is meshed with a second gear 28 on the outer side wall of a first cylinder cavity 33, when a butt joint of two steel pipes to be welded is cleaned, the two variable frequency speed regulating motors rotate at different speeds, so that the two steel pipes to be welded rotate at different speeds, and dust and rust at the butt joint and on the surface of the two steel pipes to be welded can be automatically cleaned; when the butt joint of two steel pipes to be welded is welded, the two variable frequency speed regulating motors synchronously rotate at the same speed, so that the two steel pipes to be welded are driven to synchronously rotate at the same speed, and the automatic butt welding of the steel pipes is realized.
When the utility model is used, the first chuck 29, the second chuck 30, the third chuck 31 and the fourth chuck 32 at the two ends of the first cylinder cavity 33 and the second cylinder cavity 34 are opened, two steel pipes to be welded respectively pass through the inner cavities of the first cylinder cavity 33 and the second cylinder cavity 34 and are butted (the butt joint schematic diagram of the first steel pipe 41 and the second steel pipe 42 is shown in figure 1), then the first chuck 29, the second chuck 30, the third chuck 31 and the fourth chuck 32 are closed, two steel pipes to be welded are respectively fixed with the first cylinder cavity 33 and the second cylinder cavity 34, the cleaning device is moved to the position above the butt joint of the two steel pipes to be welded, the second electric telescopic rod 18 drives the cleaning brush 19 to reach and abut against the butt joint of the two steel pipes to be welded, the two variable-frequency speed-regulating motors are started to enable the two steel pipes to be welded to rotate asynchronously and at different speeds, and dust and rust at the butt joint and on the surfaces of the two steel pipes to be welded are removed; after two steel pipes to be welded rotate at different speeds for a period of time in an asynchronous and non-synchronous mode, the two variable-frequency speed regulating motors are closed, then the cleaning device is contracted, the cleaning device is moved to be away from the joint of the two steel pipes to be welded, and automatic cleaning of dust and rust at the joint of the two steel pipes to be welded and on the surface of the two steel pipes to be welded is achieved. Then, the chucks at the two ends of the first cylinder cavity 33 or the second cylinder cavity 34 are opened, the steel pipes to be welded are slightly adjusted, the two steel pipes to be welded are adjusted to be in tight butt joint, the chucks are closed, the two steel pipes to be welded are fixed with the first cylinder cavity 33 and the second cylinder cavity 34 again, the welding gun device is moved to the position above the butt joint of the two steel pipes to be welded, the welding gun head is driven by the first electric telescopic rod 14 to reach and contact the butt joint of the two steel pipes to be welded, the two variable-frequency speed regulating motors are started, the two steel pipes to be welded rotate at the same speed synchronously, automatic butt welding is achieved, after the butt welding is completed, the first chuck 29, the second chuck 30, the third chuck 31 and the fourth chuck 32 are opened, and the steel pipes which are subjected to the butt welding are taken out.
On the basis of the above implementation form, the cross beam 10 of another technical scheme is fixed above the base 20 through the support frame 11, the cross beam 10 is provided with a clamping groove 12 parallel to the axial direction, and the first moving block 13 and the second moving block 17 are respectively clamped on the clamping groove 12 and used for the axial sliding connection of the first moving block 13 and the second moving block 17 with the cross beam 10. So that the welding gun device and the cleaning device can slide to be right above the butt joint of the two steel pipes to be welded.
On the basis of the above implementation form, another technical solution is to provide a buckle on the first motion block 13 and the second motion block 17, respectively, for fixing and releasing with the cross beam 10. Facilitating the securement of the welding gun assembly and cleaning device in selected positions on the beam 10.
On the basis of the above implementation form, another technical scheme is that a rubber block is arranged on the inner wall of a clamping jaw of the chuck.
On the basis of the above implementation form, another technical solution is that a laser pointer 16 is respectively arranged on the first motion block 13 and the second motion block 17, the indication direction of the laser pointer 16 of the first motion block 13 is downward along the axial direction of the gun head 15 of the welding gun, and the indication direction of the laser pointer 16 of the second motion block 17 is downward along the axial direction of the cleaning brush 19. When the device is used, the switch of the laser indicator 16 is pressed, so that the indicator lamp of the laser indicator 16 irradiates downwards, and the welding gun device and the cleaning device can find the position right above the butt joint of two steel pipes to be welded conveniently.
On the basis of the realization form, the upper part of the cleaning brush 19 in another technical scheme is a cavity with an upper opening and a lower opening, the lower part is a hair body extending downwards or an arc-shaped hair body connected end to end, the hair body is arranged at the non-opening part at the lower end of the cavity and on the wall of the cavity, and the upper opening of the cavity is communicated with an air exhaust pipeline.
On the basis of the above implementation form, the air draft pipeline of another technical scheme comprises a vertical pipeline and a transverse pipeline, and detachable magnet sheets are arranged on the transverse pipeline.
The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (8)
1. Automatic butt welder of butt welding steel pipe, its characterized in that includes:
a base;
the crossbeam is fixed above the base;
the supporting structure is used for supporting and driving the two steel pipes to be welded to rotate and is arranged between the base and the cross beam, the central shafts of the two steel pipes to be welded are on the same straight line, and the central shafts of the two steel pipes to be welded are parallel to the axial direction of the cross beam;
the welding gun device comprises a first moving block, a first electric telescopic rod and a welding gun, wherein the first moving block is connected with the beam in an axial sliding mode, the first electric telescopic rod is arranged on the first moving block, and the telescopic end of the first electric telescopic rod is provided with the welding gun for driving the gun head of the welding gun to reach and contact the butt joint of the two steel pipes to be welded;
cleaning device, it includes second motion piece, second electric telescopic handle and brush cleaner, the axial sliding connection of second motion piece and crossbeam, second electric telescopic handle sets up on the second motion piece, and the flexible end of second electric telescopic handle sets up the brush cleaner for the drive brush cleaner reaches and contradicts two butt joints of treating the welded steel pipe.
2. A butt welder for autobutt-welding steel pipes according to claim 1, characterized in that said support structure comprises:
the central shafts of the first cylinder cavity and the second cylinder cavity are on the same straight line, and the diameters of the inner cavities of the first cylinder cavity and the second cylinder cavity are larger than the outer diameters of the steel pipes to be welded;
the four chucks are used for clamping two steel pipes to be welded and are respectively fixed with the first cylinder cavity and the second cylinder cavity, the four chucks are respectively arranged at two ends of the first cylinder cavity and two ends of the second cylinder cavity, and the four chucks are in the same straight line with the central axes of the first cylinder cavity and the second cylinder cavity;
the four supporting plates rotatably support the first cylinder cavity and the second cylinder cavity through bearings respectively;
and the gears at the output ends of the two variable-frequency speed-regulating motors are respectively meshed with the gears on the outer side walls of the first cylinder cavity and the second cylinder cavity.
3. The butt welder for automatically butt-welding steel pipes according to claim 1, wherein the cross beam is fixed above the base by a support frame, a clamping groove parallel to the axial direction is formed in the cross beam, and the first moving block and the second moving block are respectively clamped in the clamping groove and used for axially sliding connection between the first moving block and the cross beam.
4. The butt welder for automatically butt-welding steel pipes according to claim 1, wherein the first moving block and the second moving block are respectively provided with a buckle which is fixed to and released from the cross beam.
5. A butt welder for autobutt-welding steel pipes according to claim 2, wherein the inner walls of the jaws of the chuck are provided with rubber blocks.
6. The butt welder for automatically butt-welding steel pipes according to any one of claims 1 to 5, wherein laser pointers are provided on the first moving block and the second moving block, respectively, and the direction of the laser pointer on the first moving block is directed axially downward along the torch head of the welding torch and the direction of the laser pointer on the second moving block is directed axially downward along the cleaning brush.
7. The butt welder for automatically butt-welding steel pipes according to claim 6, wherein the upper part of the cleaning brush is a cavity with an upper opening and a lower opening, the lower part of the cleaning brush is a hair body extending downwards or an arc-shaped hair body connected end to end, the hair body is arranged on a non-opening part at the lower end of the cavity and on the wall of the cavity, and the upper opening of the cavity is communicated with the air draft pipeline.
8. A butt welder for autobutt-welding steel pipes according to claim 7, characterized in that said air-drawing duct comprises a vertical duct and a transverse duct, on which a detachable magnet piece is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022438125.6U CN213969618U (en) | 2020-10-28 | 2020-10-28 | Butt welder for automatically butt-welding steel pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022438125.6U CN213969618U (en) | 2020-10-28 | 2020-10-28 | Butt welder for automatically butt-welding steel pipes |
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| CN213969618U true CN213969618U (en) | 2021-08-17 |
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| CN202022438125.6U Active CN213969618U (en) | 2020-10-28 | 2020-10-28 | Butt welder for automatically butt-welding steel pipes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114523169A (en) * | 2022-04-24 | 2022-05-24 | 江苏东玖光电科技有限公司 | Back tube indium preparation device |
| CN114535747A (en) * | 2022-04-27 | 2022-05-27 | 江苏北高电气科技有限公司 | Arc welding equipment with cleaning function |
| CN115805396A (en) * | 2023-02-09 | 2023-03-17 | 山东亚泰机械有限公司 | Automatic welding device for hydraulic hard pipe |
| CN117139946A (en) * | 2023-10-31 | 2023-12-01 | 江苏格雷特重工科技发展有限公司 | Sectional welding device for crane cylinder |
| CN117644392A (en) * | 2024-01-29 | 2024-03-05 | 上海沃骋有色金属有限公司 | Metal pipe fitting welding set |
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2020
- 2020-10-28 CN CN202022438125.6U patent/CN213969618U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114523169A (en) * | 2022-04-24 | 2022-05-24 | 江苏东玖光电科技有限公司 | Back tube indium preparation device |
| CN114535747A (en) * | 2022-04-27 | 2022-05-27 | 江苏北高电气科技有限公司 | Arc welding equipment with cleaning function |
| CN114535747B (en) * | 2022-04-27 | 2022-07-12 | 江苏北高电气科技有限公司 | Arc welding equipment with clearance function |
| CN115805396A (en) * | 2023-02-09 | 2023-03-17 | 山东亚泰机械有限公司 | Automatic welding device for hydraulic hard pipe |
| CN117139946A (en) * | 2023-10-31 | 2023-12-01 | 江苏格雷特重工科技发展有限公司 | Sectional welding device for crane cylinder |
| CN117139946B (en) * | 2023-10-31 | 2023-12-29 | 江苏格雷特重工科技发展有限公司 | Sectional welding device for crane cylinder |
| CN117644392A (en) * | 2024-01-29 | 2024-03-05 | 上海沃骋有色金属有限公司 | Metal pipe fitting welding set |
| CN117644392B (en) * | 2024-01-29 | 2024-04-19 | 上海沃骋有色金属有限公司 | Metal pipe fitting welding set |
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