Local gas protection device

Abstract

The utility model discloses a local gas protection device which comprises a pipeline, a fixing structure is fixed on the inner side of the pipeline, a conduction structure is connected in the fixing structure in a threaded mode, a transmission structure is connected to the end side of the conduction structure, the transmission structure is installed on a supporting structure, and the supporting structure is installed on a workbench. The gas shielded welding device has the advantages that the laser tracker is matched with a transmission structure, on the basis of traditional pipeline gas shielded welding, gas blowing protection can be carried out on a welding seam on the inner side of a pipeline in the welding process, the problem that the welding effect is poor due to oxidation of the welding seam on the inner side of the pipeline is solved, the welding effect is improved, and the production efficiency is improved. And meanwhile, the use amount of the shielding gas is reduced, and the use efficiency of the shielding gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline welding, in particular to a local gas protection device. Background Art

[0002] With the development of welding technology, pipeline welding has gradually changed from manual welding to automatic welding. During the welding process, the welded parts need to rotate, while the welding head position remains unchanged. In the pipeline welding process, argon arc welding is usually used for non-ferrous metal pipeline welding. During the welding process, glass fiber tape is usually used to seal the end of the pipeline, and argon gas is continuously filled into the pipeline to avoid oxidation of the welding part. With the above method, argon gas is generally required to be filled into the entire pipeline system. During the inflation process, glass fiber tape is prone to leakage. Not only a large amount of argon gas is wasted during the inflation process, but also the inflation time is long, which affects the welding progress. In addition, the gas shielded welding of the prior art is generally single-sided gas shielded, which does not have a good gas shielding effect on the inner weld of the pipeline.

[0003] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a local gas protection device, which can achieve a better gas protection effect on the weld on the inner side of the pipeline by cooperating with the welding process of the robotic arm, thereby solving the problems existing in the prior art.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned better gas protection effect on the weld inside the pipeline by cooperating with the welding process of the mechanical arm, the specific technical solution adopted by the utility model is as follows:

[0008] A local gas protection device comprises a pipeline, a fixing structure is fixed on the inner side of the pipeline, a conducting structure is connected to the inner thread of the fixing structure, a transmission structure is connected to the end side of the conducting structure, the transmission structure is installed on a supporting structure, and the supporting structure is installed on a workbench.

[0009] Furthermore, the fixed structure includes a threaded sleeve, a connecting seat, a spring telescopic arm, a main guide wheel, and an auxiliary guide wheel. The circumferential side of the threaded sleeve is fixedly connected to the connecting seat, one end of the spring telescopic arm is connected to the connecting seat for damping rotation, the end of the spring telescopic arm is connected to the main guide wheel, and auxiliary guide wheels are provided on both sides of the main guide wheel.

[0010] Furthermore, the conduction structure includes a threaded rod, a first gear, a metal air guide tube, a rotary joint, a second gear, a damping telescopic gas rod, a sliding gas rod, an air guide seat, a laser tracker, a damping guide rail, a sliding lug, and a nozzle. The side end of the threaded rod is fixedly connected to the first gear, the metal air guide tube is limitedly slidably inserted into the threaded rod, and the two ends of the metal air guide tube are sealed and rotatably connected to rotary joints.

[0011] Furthermore, a second gear is fixedly connected to both end sides of the metal air guide tube, a damping telescopic gas rod is fixedly connected to the middle part of the metal air guide tube, a sliding gas rod is connected to the damping telescopic gas rod in a limit damping sliding manner, the end of the sliding gas rod is fixedly connected to an air guide seat, a laser tracker is fixedly connected to the air guide seat, and a nozzle is connected to the air guide seat.

[0012] Furthermore, the jet head is connected to the air guide seat via a telescopic tube, sliding ears are rotatably connected on both sides of the jet head, the sliding ears are damped and slidably connected in a damping guide rail, and the damping guide rail is fixedly mounted on one end surface of the air guide seat.

[0013] Furthermore, the transmission structure includes a transmission motor, a transmission base, and a third gear, and the bottom end of the transmission motor is fixedly connected to the transmission base.

[0014] Furthermore, the support structure includes a support rod, a linear guide rail, a limiting guide rail, and a support base. One side of the support rod is fixedly connected to the linear guide rail, the bottom end of the support rod is fixedly connected to the support base, and limiting guide rails are provided on both sides of the support base.

[0015] Furthermore, the driving end of the transmission motor is connected to a third gear, the third gear is meshed with the second gear, the limiting guide rail is installed on a fixed plate, and the fixed plate is installed on a workbench.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a local gas protection device, which has the following beneficial effects:

[0018] The utility model can, through the laser tracker provided and the transmission structure, perform air blowing protection on the weld on the inner side of the pipeline during the welding process on the basis of traditional pipeline gas shielded welding, so as to prevent the problem of poor welding effect caused by oxidation of the weld on the inner side of the pipeline, improve the welding effect, make the gas shielded welding protection more comprehensive, and at the same time reduce the use of shielding gas and improve the use efficiency of shielding gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the main structure of the local gas protection device according to an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the transmission structure of the local gas protection device according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the fixing structure of the local gas protection device according to an embodiment of the utility model;

[0023] Figure 4 is a schematic diagram of a conduction structure of a local gas protection device according to an embodiment of the utility model;

[0024] Figure 5 Schematic diagram of a metal air guide tube of a local air protection device according to an embodiment of the utility model;

[0025] Figure 6 It is a schematic diagram of a laser tracker for a local gas protection device according to an embodiment of the utility model.

[0026] In the figure:

[0027] 1. Pipeline; 2. Fixed structure; 201. Threaded sleeve; 202. Connecting seat; 203. Spring telescopic arm; 204. Main guide wheel; 205. Auxiliary guide wheel; 3. Conduction structure; 301. Threaded rod; 302. First gear; 303. Metal air guide tube; 304. Rotary joint; 305. Second gear; 306. Damping telescopic gas rod; 307. Sliding gas rod; 308. Air guide seat; 309. Laser tracker; 310. Damping guide rail; 311. Sliding lug; 312. Injection head; 4. Transmission structure; 401. Transmission motor; 402. Transmission base; 403. Third gear; 5. Support structure; 501. Support rod; 502. Linear guide rail; 503. Limiting guide rail; 504. Support base. DETAILED DESCRIPTION

[0028] For further explanation, the present invention is provided with accompanying drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-6 As shown, it includes a pipeline 1, a fixing structure 2 is fixed on the inner side of the pipeline 1, a conducting structure 3 is connected to the inner thread of the fixing structure 2, a transmission structure 4 is connected to the end side of the conducting structure 3, the transmission structure 4 is installed on a supporting structure 5, and the supporting structure 5 is installed on a workbench.

[0030] Pipeline 1 is a metal pipe 1 to be welded. The fixing structure 2 is guided into the pipe 1 to fix the pipe through the transmission effect of the conducting structure 3. The transmission structure 4 can transmit the conducting structure 3 so that its nozzle 312 can follow the welding robot arm or the handheld welding gun for real-time transmission. The supporting structure 5 supports other structures.

[0031] The fixed structure 2 includes a threaded sleeve 201, a connecting seat 202, a spring telescopic arm 203, a main guide wheel 204, and an auxiliary guide wheel 205. The connecting seat 202 is fixedly connected to the circumference of the threaded sleeve 201. One end of the spring telescopic arm 203 is connected to the connecting seat 202 for damping rotation. The end of the telescopic arm of the spring telescopic arm 203 is connected to the main guide wheel 204, and auxiliary guide wheels 205 are provided on both sides of the main guide wheel 204.

[0032] When the spring telescopic arm 203 is compressed to the inner diameter length of the pipe 1, it is introduced into the interior thereof. Under the transmission action of the threaded rod 301, and since the main guide wheel 204 and the auxiliary guide wheel 205 are one-way limit settings with respect to the axial direction of the pipe 1, after the fixed structure 2 is transmitted to the specified position of the pipe 1, the threaded rod 301 and the threaded sleeve 201 will be relatively fixed to the pipe 1. In the process of introducing the fixed structure 2 into the pipe 1, the spring telescopic arms 203 corresponding to different groups of fixed structures 2 can be selected to produce corresponding angles, thereby improving the fixing effect.

[0033] The conducting structure 3 comprises a threaded rod 301, a first gear 302, a metal air pipe 303, a rotary joint 304, a second gear 305, a damping telescopic air rod 306, a sliding air rod 307, an air guide seat 308, a laser tracker 309, a damping guide rail 310, a sliding lug 311, and an air injection head 312. The side end of the threaded rod 301 is fixedly connected with the first gear 302, the metal air pipe 303 is limitedly slidably penetrated in the threaded rod 301, the two end sides of the metal air pipe 303 are sealed and rotatably connected with the rotary joint 304, the two end sides of the metal air pipe 303 are fixedly connected with the second gear 305, and the metal A damping telescopic gas rod 306 is fixedly connected to the middle part of the air guide tube 303, and a sliding gas rod 307 is connected to the damping telescopic gas rod 306 in a limit damping sliding manner. The end of the sliding gas rod 307 is fixedly connected to an air guide seat 308, and a laser tracker 309 is fixedly connected to the air guide seat 308. The air guide seat 308 is connected to an injection head 312, and the injection head 312 and the air guide seat 308 are connected by a telescopic tube. Sliding ears 311 are rotatably connected on both sides of the injection head 312. The sliding ears 311 are damped and slidably connected in the damping guide rail 310, and the damping guide rail 310 is fixedly installed on one end surface of the air guide seat 308.

[0034] During the initial installation of the pipeline 1, the fixed structure 2 is inserted through the threaded rod 301, and the fixed structure 2 is compressed and introduced into the interior of the pipeline 1 by rotating the threaded rod 301. Each pipeline 1 is penetrated by at least two sets of fixed structures 2 to play a positioning role. Then the threaded rod 301 and the internal metal air guide tube 303 are installed on the top of the support rod 501. The top of the support rod 501 is connected to the threaded rod 301 through a damping shaft. Then, the protective gas introduction device is sealed and rotated through the rotary joint 304, and the output pressure of the protective gas is limited at the same time. The laser tracker 309 includes a semiconductor laser, an output lens, an input lens, a CMOS array, and a signal processor. The semiconductor laser produces The raw laser is transmitted to the laser reflection device of the robot arm or the handheld welding gun through the output lens, and then the reflected laser is transmitted to the CMOS array through the input lens. After the detection and processing of the signal processor, the spacing is detected, and then the signal is transmitted to the transmission motor 401 to transmit the second gear 305. The second gear 305 drives the metal air guide tube 303 and the damping telescopic air rod 306 to perform real-time transmission, so that the nozzle 312 on the air guide seat 308 can follow the robot arm or the handheld welding gun to blow on the welding point in real time, and then perform gas protection from the inside of the pipeline 1. In addition, due to the local point blowing, the use of protective gas is reduced, the utilization effect is improved, and the rotation is prevented.

[0035] The transmission structure 4 includes a transmission motor 401 , a transmission base 402 , and a third gear 403 . The bottom end of the transmission motor 401 is fixedly connected to the transmission base 402 . The driving end of the transmission motor 401 is connected to the third gear 403 . The third gear 403 is meshed with the second gear 305 .

[0036] The transmission motor 401 of the transmission structure 4 is height-adjusted by transmitting the motor built into the transmission base 402 and the worm in the linear guide rail 502 , so that the third gear 403 can be meshed with the second gear 305 for transmission.

[0037] The supporting structure 5 includes a supporting rod 501, a linear guide rail 502, a limiting guide rail 503, and a supporting base 504. The linear guide rail 502 is fixedly connected to one side of the supporting rod 501, and the bottom end of the supporting rod 501 is fixedly connected to the supporting base 504. Limiting guide rails 503 are provided on both sides of the supporting base 504. The limiting guide rails 503 are installed on a fixed plate, and the fixed plate is installed on a workbench.

[0038] The supporting structure 5 is installed as a whole on the workbench. A worm is provided on the linear guide rail 502 to support the transmission base 402 of the transmission structure 4. The supporting base 504 can be adjusted by damping sliding on the limiting guide rail 503, and can be adjusted to the corresponding position of the pipeline 1 by manpower or machinery.

[0039] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0040] In summary, with the aid of the above technical solution of the utility model, the pipe 1 is a metal pipe 1 to be welded, the fixed structure 2 is introduced into the pipe 1 to fix the pipe through the transmission effect of the conductive structure 3, the transmission structure 4 can transmit the conductive structure 3, so that its nozzle 312 can follow the welding robot arm or the handheld welding gun for real-time transmission, the supporting structure 5 supports and fixes other structures, and the spring telescopic arm 203 is introduced into the interior of the pipe 1 when it is compressed to the inner diameter length of the pipe 1. The threaded sleeve 201 is under the transmission action of the threaded rod 301, and because the main guide wheel 204 and the auxiliary guide wheel 205 are unidirectional limit settings with the axial direction of the pipe 1, after the fixed structure 2 is transmitted to the specified position of the pipe 1, the threaded rod 301 and the threaded sleeve 201 are connected to the pipe 1. The sleeve 201 will be relatively fixed to the pipe 1. During the process of introducing the fixed structure 2 into the pipe 1, the spring telescopic arms 203 corresponding to different groups of fixed structures 2 can be selected to generate corresponding angles, thereby improving the fixing effect. During the initial installation of the pipe 1, the fixed structure 2 is inserted through the threaded rod 301, and the fixed structure 2 is compressed and introduced into the pipe 1 by rotating the threaded rod 301. Each pipe 1 is penetrated by at least two groups of fixed structures 2 to play a positioning role. After that, the threaded rod 301 and the internal metal air guide tube 303 are installed on the top of the support rod 501. The top of the support rod 501 is connected to the threaded rod 301 through a damping shaft. When the threaded rod 301 still needs to be rotated after being connected to the support rod 501, it is necessary to apply a damping force to the threaded rod 301. A certain torque is used for transmission, and then the protective gas introduction device is connected through the rotary joint 304 to seal and rotate, while limiting the output pressure of the protective gas. The laser tracker 309 includes a semiconductor laser, an output lens, an input lens, a CMOS array, a signal processor, etc., which are mature existing technologies. The semiconductor laser generates laser light and transmits it to the laser reflection device of the robot arm or the handheld welding gun through the output lens. Then the reflected laser light is transmitted to the CMOS array through the input lens. The spacing is detected by the signal processor, and then the signal is transmitted to the transmission motor 401 to transmit the second gear 305. The second gear 305 drives the metal air guide tube 303 and the damping telescopic gas rod 306 to perform real-time transmission. The air guide seat 30 The nozzle 312 on 8 can follow the robot arm or handheld welding gun to blow on the welding point in real time, and then perform gas protection from the inside of the pipeline 1. Since the metal gas guide tube 303 and the threaded rod 301 are connected by sliding limit, the transmission of the metal gas guide tube 303 will not affect the rotation of the threaded rod 301. According to the detection of the spacing, the telescopic height of the electric damping telescopic gas rod 306 can be adjusted to prevent it from touching the pipe wall. Since the local point blowing is performed, the use of protective gas is reduced and the utilization effect is improved. The transmission motor 401 of the transmission structure 4 is driven by the motor built into the transmission base 402 and the worm in the linear guide rail 502 for height adjustment, so that the third gear 403 can be meshed with the second gear 305 for transmission.The support structure 5 is installed on the workbench as a whole. A worm is provided on the linear guide rail 502 to support the transmission base 402 of the transmission structure 4. The support base 504 can be adjusted by damping sliding on the limit guide rail 503, and can be adjusted to the corresponding position of the pipeline 1 by manpower or machinery.

[0041] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A local gas protection device, characterized in that: The invention comprises a pipeline (1), a fixing structure (2) is fixed on the inner side of the pipeline (1), a conducting structure (3) is connected to the inner thread of the fixing structure (2), a transmission structure (4) is connected to the end side of the conducting structure (3), the transmission structure (4) is mounted on a supporting structure (5), and the supporting structure (5) is mounted on a workbench.

2. A local gas protection device according to claim 1, characterized in that: The fixed structure (2) comprises a threaded sleeve (201), a connecting seat (202), a spring telescopic arm (203), a main guide wheel (204), and an auxiliary guide wheel (205); the threaded sleeve (201) is fixedly connected to the connecting seat (202) on its circumferential side; one end of the spring telescopic arm (203) is connected to the connecting seat (202) in a damping rotation manner; the end of the telescopic arm of the spring telescopic arm (203) is connected to the main guide wheel (204); and auxiliary guide wheels (205) are provided on both sides of the main guide wheel (204).

3. A local gas protection device according to claim 2, characterized in that: The conduction structure (3) comprises a threaded rod (301), a first gear (302), a metal air guide tube (303), a rotary joint (304), a second gear (305), a damping telescopic gas rod (306), a sliding gas rod (307), an air guide seat (308), a laser tracker (309), a damping guide rail (310), a sliding lug (311), and an air injection head (312); the side end of the threaded rod (301) is fixedly connected to the first gear (302); the metal air guide tube (303) is limitedly slidably penetrated in the threaded rod (301); and the two ends of the metal air guide tube (303) are sealed and rotatably connected to the rotary joints (304).

4. A local gas protection device according to claim 3, characterized in that: The second gear (305) is fixedly connected to both end sides of the metal air guide tube (303), a damping telescopic gas rod (306) is fixedly connected to the middle part of the metal air guide tube (303), a sliding gas rod (307) is connected to the damping telescopic gas rod (306) in a limit damping sliding manner, the end of the sliding gas rod (307) is fixedly connected to an air guide seat (308), a laser tracker (309) is fixedly connected to the air guide seat (308), and a nozzle (312) is connected to the air guide seat (308).

5. A local gas protection device according to claim 4, characterized in that: The jet head (312) is connected to the air guide seat (308) via a telescopic tube, and sliding ears (311) are rotatably connected on both sides of the jet head (312). The sliding ears (311) are damped and slidably connected in a damping guide rail (310), and the damping guide rail (310) is fixedly mounted on one end surface of the air guide seat (308).

6. A local gas protection device according to claim 5, characterized in that: The transmission structure (4) comprises a transmission motor (401), a transmission base (402), and a third gear (403), and the bottom end of the transmission motor (401) is fixedly connected to the transmission base (402).

7. A local gas protection device according to claim 6, characterized in that: The support structure (5) comprises a support rod (501), a linear guide rail (502), a limiting guide rail (503), and a support base (504); one side of the support rod (501) is fixedly connected to the linear guide rail (502); the bottom end of the support rod (501) is fixedly connected to the support base (504); and limiting guide rails (503) are provided on both sides of the support base (504).

8. A local gas protection device according to claim 7, characterized in that: The driving end of the transmission motor (401) is connected to a third gear (403), the third gear (403) is meshed with the second gear (305), and the limiting guide rail (503) is mounted on a fixed plate, and the fixed plate is mounted on a workbench.

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