Automatic narrow-gap welding and weld joint polishing device for pipelines

Abstract

The utility model provides a pipeline narrow-gap automatic welding and weld joint polishing device, which comprises a circular rail mounted on a pipeline, coaxial with the pipeline and spaced from a narrow-gap weld joint by a certain distance; the walking mechanism is mounted on the circular rail and can move along the circular rail; the executing mechanism is mounted on the walking mechanism, can move along the circular rail along with the walking mechanism, and is used for stretching into the narrow gap to automatically weld a welding layer and polish a welding seam; and the image acquisition device is mounted on the walking mechanism, can move along the circular rail along with the walking mechanism, and is used for collecting the welding and polishing conditions of the welding layer. Compared with the prior art, the automatic narrow-gap welding and weld joint polishing device for the pipeline has the advantages that free switching between a welding function and a polishing function is achieved, the welding speed and the polishing speed can be increased, the polishing condition of a welding layer can be conveniently observed through the image acquisition device, and reliable basis is provided for operators to judge whether polishing is qualified or not; and closed-loop control over grinding is achieved.

Description

Technical Field

[0001] The utility model relates to the field of welding, and more specifically, to a pipeline narrow gap automatic welding and weld grinding device. Background Art

[0002] In the fields of power, petrochemical and shipbuilding, the welding of large thick-walled pipes generally adopts narrow gap automatic welding. However, as the welding progresses, the high-temperature molten pool and the surrounding metal will be oxidized by oxygen in the air during the cooling process, forming an oxide film on the surface. In addition, due to the influence of the filler metal, slag will appear on the surface of the weld after welding. When welding the next layer, if the weld surface is not polished, welding defects such as pores and slag inclusions are very likely to occur in the weld, seriously affecting the welding quality.

[0003] At present, narrow gap welding is generally carried out with automatic welding equipment, and the cleaning of oxide film and slag is mainly done manually with angle grinders, electric grinders or wire brushes. However, due to the deep, narrow and large circumferential dimensions of narrow gap grooves, the manual treatment method has the following defects: incomplete cleaning or even inaccessible cleaning affects welding quality; large grinding volume affects welding progress; manual grinding is inefficient and costly.

[0004] In view of this, it is indeed necessary to provide a pipeline narrow gap automatic welding and weld grinding device to improve the welding and grinding efficiency of narrow gap welds and ensure the welding quality. Utility Model Content

[0005] The utility model aims to overcome the defects of the prior art and provide a pipeline narrow gap automatic welding and weld grinding device to improve the welding and grinding efficiency of narrow gap welds and ensure welding quality.

[0006] In order to achieve the above-mentioned invention object, the utility model provides a pipeline narrow gap automatic welding and weld grinding device, which comprises:

[0007] a circular rail mounted on the pipeline, coaxial with the pipeline and spaced a certain distance from the narrow gap weld;

[0008] A walking mechanism, mounted on the circular rail and capable of moving along the circular rail;

[0009] an actuator, which is mounted on the traveling mechanism and can move along the circular rail with the traveling mechanism, and is used to penetrate into the narrow gap to automatically weld the welding layer and grind the weld; and

[0010] An image acquisition device is installed on the traveling mechanism and can move along the circular track with the traveling mechanism to collect the welding and grinding conditions of the welding layer.

[0011] According to one embodiment of the utility model of the automatic welding and weld grinding device for narrow gap pipelines, the actuator includes a connecting mechanism, a driving mechanism, a grinding assembly or a welding torch, the connecting mechanism is used to fix the driving mechanism on the walking mechanism, and the grinding assembly and the welding torch are installed on the driving mechanism, and are respectively used for welding and grinding the narrow gap weld.

[0012] According to an embodiment of the utility model of the automatic welding and weld grinding device for narrow gaps in pipelines, the connecting mechanism includes a mounting plate and a mounting block mounted on the mounting plate, the actuator is mounted on the mounting block, a rack is provided on one side of the mounting plate, the walking mechanism is provided with a motor, and the output shaft of the motor is provided with a gear, and the mounting block and the actuator are driven to move up and down through the cooperation of the rack and the gear.

[0013] According to an embodiment of the utility model of the automatic welding and weld grinding device for narrow gaps in pipelines, the mounting plate includes a front mounting plate and a rear mounting plate, a front slide rail / front slider combination is fixedly mounted on one side of the front mounting plate, the slider is fixed to the inside of the slide rail by a fixing bolt, a rear slide rail is provided on the rear mounting plate, and a slide bar is provided on the other side of the front mounting plate, the slide bar is inserted into the slide rail and is clamped and fixed by a fixing screw.

[0014] According to an embodiment of the utility model of the automatic welding and weld grinding device for narrow gaps in pipelines, the driving mechanism includes a housing, a driving motor installed in the housing, a gear set formed by two identical gears meshing, and a clamping assembly, wherein the driving wheel in the gear set is installed on the output end of the driving motor through a coupling, and the welding torch and the grinding assembly are installed at the center position of the driven wheel.

[0015] According to one embodiment of the utility model of the automatic welding and weld grinding device for narrow gaps in pipelines, an interface for connecting the air circuit and the water circuit is provided on the upper surface of the driven wheel of the gear set, and the clamping assembly includes a tungsten pole clamp and a pressure cap for accommodating a tungsten pole or a grinding assembly, and the interior of the pressure cap is a conical cavity and is fixedly connected to the upper center position of the driven wheel by threads.

[0016] According to an embodiment of the utility model of the automatic welding and weld grinding device for narrow gaps in pipelines, the grinding assembly includes a grinding head and a mounting rod, the diameter of the mounting rod matches the diameter of the tungsten electrode in the welding torch, one end of the mounting rod is provided with a thread, and the center of the upper surface of the grinding head is provided with a threaded hole, and the mounting rod is installed in the threaded hole of the grinding head through a threaded connection.

[0017] According to an embodiment of the utility model of the pipeline narrow gap automatic welding and weld grinding device, the image acquisition device includes a mounting frame and a camera mounted on the mounting frame, and the viewing angle of the camera is aligned with the end of the grinding assembly.

[0018] According to an embodiment of the utility model of the pipeline narrow gap automatic welding and weld grinding device, the mounting frame of the image acquisition device is symmetrically installed on both sides of the actuator, and the mounting frame is respectively installed with an X-direction adjustment bolt and a Y-direction adjustment bolt.

[0019] According to one embodiment of the utility model of the automatic welding and weld grinding device for narrow gaps in pipelines, the automatic welding and weld grinding device for narrow gaps in pipelines further includes a host computer, the image acquisition device uploads the image data to the host computer, and the host computer displays the surface image of the weld in real time for the staff to judge whether the surface of the weld layer is qualified.

[0020] Compared with the prior art, the utility model of the pipeline narrow gap automatic welding and weld grinding device has the following technical effects:

[0021] The integrated design of the automatic welding device and the grinding device enables free switching between the welding and grinding functions, which can increase the welding and grinding rates and ensure welding quality.

[0022] The image acquisition device replaces the manual observation of the surface state of the weld layer during the grinding process, which makes it easier to observe the grinding condition of the weld layer and provides a clearer image. It provides a reliable basis for operators to judge whether the grinding is qualified and realizes closed-loop control of the grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 The utility model is a schematic diagram of the structure of the automatic welding and weld grinding device for narrow gaps in pipelines.

[0025] Figure 2 The utility model is a schematic diagram of the structure of the actuator in the automatic pipeline narrow gap welding and weld grinding device.

[0026] Figure 3 The utility model is a structural schematic diagram of the connection mechanism in the automatic pipeline narrow gap welding and weld grinding device.

[0027] Figure 4It is a structural schematic diagram of another angle of the connection mechanism in the automatic pipeline narrow gap welding and weld grinding device of the utility model.

[0028] Figure 5 The utility model is a schematic diagram of the structure of the driving mechanism of the automatic welding and weld grinding device for narrow gaps in pipelines.

[0029] Figure 6 for Figure 5 The assembly diagram of the driving motor and the gear set in the driving mechanism shown.

[0030] Figure 7 The utility model is a schematic diagram of the structure of the grinding component in the automatic welding and weld grinding device for narrow gaps in pipelines.

[0031] Figure 8 The utility model is a schematic diagram of the assembly of the grinding component and the driving mechanism in the automatic welding and weld grinding device for narrow gaps in pipelines.

[0032] Fig. 9 The utility model is a schematic diagram of the assembly of a welding torch and a driving mechanism in the automatic welding and weld grinding device for narrow gaps in pipelines.

[0033] Fig.10 The utility model is a schematic diagram of the structure of the clamping assembly in the automatic welding and weld grinding device for narrow gaps in pipelines.

[0034] Fig.11 The utility model is a structural schematic diagram of the image acquisition device in the pipeline narrow gap automatic welding and weld grinding device.

[0035] As shown in the figure: circular rail 10, actuator 20, connecting mechanism 200, front mounting plate 202, rear mounting plate 204, first square rod 205, mounting block 206, second square rod 207, rack 208, motor 209, driving mechanism 210, housing 212, driving motor 214, driving wheel 216, driven wheel 217, clamping assembly 218, tungsten electrode clamp 220, pressure cap 222, grinding assembly 224, grinding head 226, mounting rod 228, welding torch 230, walking mechanism 30, image acquisition device 40, mounting frame 400, X-axis adjusting bolt 402, Y-axis adjusting bolt 404, camera 406. DETAILED DESCRIPTION

[0036] In order to make the invention purpose, technical scheme and technical effect of the utility model clearer, the utility model is further described in detail below in conjunction with the drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining the utility model, not for limiting the utility model.

[0037] It should be understood that the terms used in the utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the utility model specification and the appended claims, the singular forms of "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in the utility model specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0038] Please refer to Figure 1 As shown, the utility model provides a pipeline narrow gap automatic welding and weld grinding device, which includes:

[0039] The circular rail 10 is mounted on the pipeline, coaxial with the pipeline and spaced a certain distance from the narrow gap weld;

[0040] A walking mechanism 30 is mounted on the circular rail 10 and can move along the circular rail 10;

[0041] An actuator 20 is mounted on the traveling mechanism 30 and can move along the circular rail 10 with the traveling mechanism 30 to penetrate into a narrow gap to automatically weld the welding layer and grind the weld; and

[0042] The image acquisition device 40 is installed on the traveling mechanism 30 and can move along the circular rail 10 with the traveling mechanism 30 to collect the welding and grinding conditions of the welding layer.

[0043] Please refer to Figure 2 As shown, the actuator 20 includes a connecting mechanism 200, a driving mechanism 210, a grinding assembly 224 or a welding torch 230. The connecting mechanism 200 is used to fix the driving mechanism 210 to the walking mechanism 30. The grinding assembly 224 and the welding torch 230 are installed on the driving mechanism 210, and are respectively used for welding and grinding narrow gap welds.

[0044] Please refer to Figure 3 and Figure 4 As shown, the connecting mechanism 200 includes a mounting plate and a mounting block 206 mounted on the mounting plate, the actuator 20 is mounted on the mounting block 206, a rack 208 is provided on one side of the mounting plate, the walking mechanism 30 is provided with a motor 209, and the output shaft of the motor 209 is provided with a gear, which drives the mounting block 206 and the actuator 20 to move up and down through the cooperation of the rack 208 and the gear.

[0045] Specifically, the connecting mechanism 200 includes a front mounting plate 202, a rear mounting plate 204, a first square rod 205, a second square rod 207, a mounting block 206, and a motor 209. A slide rail and slider combination is fixedly installed on one side of the front mounting plate 202, and the slider is fixed to the inside of the slide rail by a fixing bolt. The first square rod 205 is installed on the slider, and the second square rod 207 is fixedly connected to the first square rod 205 and the mounting block 206 respectively. The bottom of the actuator 20 is connected to the connecting mechanism 200 through the mounting block 206. A slide rail is provided on the rear mounting plate 204, and a slide bar is provided on the other side of the front mounting plate 202. After the slide bar is inserted into the slide rail, it is clamped and fixed with a fixing screw. A rack 208 is installed on one side of the rear mounting plate 204. By meshing with the gear on the output shaft of the motor of the walking mechanism 30, the upper and lower positions of the rear mounting block 204 can be electrically adjusted, thereby driving the actuator 20 to move up and down.

[0046] Please refer to Figure 5 and Figure 6 As shown, the driving mechanism 210 includes a housing 212, a driving motor 214 installed in the housing 212, a gear set formed by two identical gears meshing, and a clamping assembly 218, wherein the driving wheel 216 in the gear set is installed on the output end of the driving motor 214 through a coupling, and the welding torch 230 and the grinding assembly 224 are installed at the center position of the driven wheel 217.

[0047] Please refer to Figure 6 and Fig.10 As shown, the upper surface of the driven wheel 217 of the gear set is provided with an interface for connecting the air circuit and the water circuit, and the clamping assembly 218 includes a tungsten pole clamp 220 and a pressure cap 222 for accommodating a tungsten pole or a grinding assembly 224. The interior of the pressure cap 222 is a conical cavity and is fixedly connected to the upper center position of the driven wheel 217 by threads.

[0048] Please refer to Figure 7 As shown, the grinding assembly 224 includes a grinding head 226 and a mounting rod 228. The diameter of the mounting rod 228 matches the diameter of the tungsten electrode in the welding torch 230. One end of the mounting rod 228 is provided with a thread. A threaded hole is provided in the center of the upper surface of the grinding head 226. The mounting rod 228 is installed in the threaded hole of the grinding head 226 through a threaded connection.

[0049] Please refer to Fig.11 As shown, according to an embodiment of the pipeline narrow gap automatic welding and weld grinding device of the utility model, the image acquisition device 40 includes a mounting frame 400 and a camera 406 mounted on the mounting frame 400, and the viewing angle of the camera 406 is aligned with the end of the grinding assembly. According to an embodiment of the pipeline narrow gap automatic welding and weld grinding device of the utility model, the mounting frame 400 of the image acquisition device 40 is symmetrically installed on both sides of the actuator 20, and the mounting frame 400 is respectively installed with an X-direction adjustment bolt 402 and a Y-direction adjustment bolt 404.

[0050] It can be understood that according to one embodiment of the utility model of the pipeline narrow gap automatic welding and weld grinding device, the pipeline narrow gap automatic welding and weld grinding device further includes a host computer, the image acquisition device 40 uploads the image data to the host computer, and the host computer displays the weld surface image in real time for the staff to judge whether the weld layer surface is qualified.

[0051] The working principle of the utility model pipeline narrow gap automatic welding and weld grinding device is as follows:

[0052] The circular rail 10 is fixedly mounted on the pipeline, coaxial with the pipeline and kept at a proper distance from the narrow gap weld;

[0053] Adjust the position and angle so that the upper computer can clearly display the weld surface status;

[0054] Install the welding machine trolley on the pipeline, install the welding torch 230 in the actuator 20, and then perform welding;

[0055] Please refer to Figure 8 and Fig. 9 As shown, after welding a layer of weld bead, a suitable grinding head 226 is selected according to the width of the narrow gap weld, and the welding torch is replaced with the grinding assembly 224;

[0056] Adjust the height of the grinding assembly 224 so that it is close to the narrow gap weld bead;

[0057] The driving motor 214 of the running mechanism 30 and the actuator 20 is driven. The driving motor in the actuator drives the grinding assembly to rotate at high speed through the gear set, and starts to grind the oxide film and impurities of the narrow gap weld of the entire pipeline by friction with the narrow gap weld.

[0058] The high-definition camera in the image acquisition device 40 captures the real-time grinding of the weld and uploads the high-definition image to the host computer for display. The staff determines whether the weld surface is qualified based on the grinding status of the weld displayed by the host computer;

[0059] The traveling mechanism 30 drives the actuator 20 to travel along the weld on the circular rail 10, so that all positions of the narrow gap weld can be polished.

[0060] Combined with the above detailed description of the implementation mode of the utility model, it can be seen that, compared with the prior art, the utility model pipeline narrow gap automatic welding and weld grinding device has the following technical effects:

[0061] The integrated design of the automatic welding device and the grinding device enables free switching between the welding and grinding functions, which can increase the welding and grinding rates and ensure welding quality.

[0062] The image acquisition device 40 replaces the manual observation of the surface state of the weld layer during the grinding process, making it easier to observe the grinding condition of the weld layer and providing a clearer image, thus providing a reliable basis for operators to judge whether the grinding is qualified and realizing closed-loop control of the grinding.

[0063] Grinding heads 226 of different shapes and sizes can be adapted according to the size of the narrow gap weld, ensuring that any position on the weld surface can be ground during high-speed rotation, making the weld oxide film and slag grinding more thorough.

[0064] According to the above principles, the present invention can also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A pipeline narrow gap automatic welding and weld grinding device, characterized in that: include: a circular rail mounted on the pipeline, coaxial with the pipeline and spaced a certain distance from the narrow gap weld; A walking mechanism, mounted on the circular rail and capable of moving along the circular rail; An actuator is installed on the traveling mechanism and can move along the circular rail with the traveling mechanism, so as to penetrate into the narrow gap to automatically weld the welding layer and grind the weld; as well as An image acquisition device is installed on the traveling mechanism and can move along the circular track with the traveling mechanism to collect the welding and grinding conditions of the welding layer.

2. The pipeline narrow gap automatic welding and weld grinding device according to claim 1 is characterized in that: The actuator includes a connecting mechanism, a driving mechanism, a grinding assembly or a welding torch. The connecting mechanism is used to fix the driving mechanism on the walking mechanism. The grinding assembly and the welding torch are installed on the driving mechanism and are respectively used for welding and grinding the narrow gap weld.

3. The pipeline narrow gap automatic welding and weld grinding device according to claim 2 is characterized in that: The connecting mechanism includes a mounting plate and a mounting block mounted on the mounting plate, the actuator is mounted on the mounting block, a rack is provided on one side of the mounting plate, the walking mechanism is provided with a motor, and a gear is provided on the output shaft of the motor. The mounting block and the actuator are driven to move up and down through the cooperation of the rack and the gear.

4. The pipeline narrow gap automatic welding and weld grinding device according to claim 3 is characterized in that: The mounting plate includes a front mounting plate and a rear mounting plate, a front slide rail / front slider combination is fixedly mounted on one side of the front mounting plate, the slider is fixed inside the slide rail by a fixing bolt, a rear slide rail is provided on the rear mounting plate, a slide bar is provided on the other side of the front mounting plate, the slide bar is inserted into the slide rail and is clamped and fixed by a fixing screw.

5. The pipeline narrow gap automatic welding and weld grinding device according to claim 2 is characterized in that: The driving mechanism includes a housing, a driving motor installed in the housing, a gear set formed by two identical gears meshing together, and a clamping assembly, wherein the driving wheel in the gear set is installed on the output end of the driving motor through a coupling, and the welding torch and grinding assembly are installed at the center position of the driven wheel in the gear set.

6. The pipeline narrow gap automatic welding and weld grinding device according to claim 5 is characterized in that: The upper surface of the driven wheel of the gear set is provided with an interface for connecting the air circuit and the water circuit. The clamping assembly includes a tungsten pole clamp and a pressure cap for accommodating a tungsten pole or a grinding assembly. The interior of the pressure cap is a conical cavity and is fixedly connected to the upper center position of the driven wheel by threads.

7. The pipeline narrow gap automatic welding and weld grinding device according to claim 2 is characterized in that: The grinding assembly includes a grinding head and a mounting rod. The diameter of the mounting rod matches the diameter of the tungsten electrode in the welding torch. One end of the mounting rod is provided with a thread. The center of the upper surface of the grinding head is provided with a threaded hole. The mounting rod is installed in the threaded hole of the grinding head through a threaded connection.

8. The pipeline narrow gap automatic welding and weld grinding device according to claim 2 is characterized in that: The image acquisition device comprises a mounting frame and a camera mounted on the mounting frame, and the viewing angle of the camera is aligned with the end of the grinding assembly.

9. The pipeline narrow gap automatic welding and weld grinding device according to claim 8 is characterized in that: The mounting frame of the image acquisition device is symmetrically mounted on both sides of the actuator, and an X-direction adjusting bolt and a Y-direction adjusting bolt are respectively mounted on the mounting frame.

10. The pipeline narrow gap automatic welding and weld grinding device according to any one of claims 1 to 9, characterized in that: It further includes a host computer, the image acquisition device uploads the image data to the host computer, and the host computer displays the weld surface image in real time for the staff to judge whether the weld surface is qualified.

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