Plasma spray welding device for wear-resistant belt of heavy weight drill pipe

Abstract

The utility model provides a plasma spray welding device for a wear-resistant belt of a heavy weight drill pipe. The plasma spray welding device comprises a conveying mechanism, a welding mechanism and a supporting device. The conveying mechanism is arranged on one side of the outer front portion of the welding mechanism and used for guiding and conveying the heavy weight drill pipe into the welding mechanism. The welding mechanism is arranged between the conveying mechanism and the supporting device, a feeding port and a discharging port are formed in one side of the front portion and one side of the rear portion of the welding box body respectively, and a welding gun is arranged on the upper portion in the welding box body, controlled by a servo motor and capable of moving in the vertical direction and the horizontal front-back direction. A three-jaw chuck which is used for clamping the heavy weight drill pipe and can be controlled to rotate is rotationally arranged at the rear part in the welding box body; the supporting device is arranged on the outer rear portion of the welding mechanism. The welding mechanism is arranged between the conveying mechanism and the supporting device, the heavy weight drill pipe is firmly fixed through the three-jaw chuck, the heavy weight drill pipe is kept balanced all the time in the rotating process in cooperation with two-end supporting of the conveying mechanism and the supporting device, and spray welding deviation caused by uneven rotation of the heavy weight drill pipe can be avoided.

Description

Technical Field

[0001] This application relates to the technical field of welding equipment, and particularly to a plasma spray welding device for wear-resistant bands on heavy drill pipes. Background Art

[0002] Heavy drill pipes are essential key tools in oil and gas drilling engineering. Their main functions are to increase the weight of the drill string during drilling, maintain the verticality of drilling, and improve drilling efficiency. Due to the complex drilling environment, heavy drill pipes will endure intense friction and impact during operation. Especially when contacting the wellbore wall, the surface wear is severe. Therefore, in order to extend the service life of heavy drill pipes, it is usually necessary to perform plasma spray welding on their surfaces to enhance their wear resistance.

[0003] As an efficient surface strengthening process, plasma spray welding technology can be used for the repair and strengthening of wear-resistant bands on heavy drill pipes. When implementing welding with existing plasma spray welding devices, the workpiece is usually fixed by a clamping device before surface welding. However, in the prior art, although the spray welding device can completely fix the heavy drill pipe through the clamping device, when performing plasma spray welding of the wear-resistant band on the outer surface of the heavy drill pipe, a complete circle of spray welding needs to be carried out at a certain position on the rod body. This way of completely fixing the heavy drill pipe before performing spray welding requires continuous manual adjustment of the heavy drill pipe or adjustment of the welding torch. Due to the influence of human factors, it is difficult to keep the heavy drill pipe stable within the welding area, thus affecting the surface quality after spray welding. Summary of the Utility Model

[0004] This application provides a plasma spray welding device for wear-resistant bands on heavy drill pipes to solve the problem that when performing plasma spray welding of the wear-resistant band on the outer surface of a heavy drill pipe in the prior art, it is difficult to keep the heavy drill pipe stable within the welding area, thus affecting the surface quality after spray welding.

[0005] To solve the above technical problems, this application is implemented by adopting the following technical solutions:

[0006] This application provides a plasma spray welding device for wear-resistant bands on heavy drill pipes, including a conveying mechanism, a welding mechanism, and a supporting device;

[0007] The conveying mechanism is arranged on the outer front side of the welding mechanism and is used to guide and convey the heavy drill pipe into the welding mechanism;

[0008] The welding mechanism is arranged between the conveying mechanism and the supporting device. The welding mechanism includes a welding box body. On one side in the front of the welding box body, there is a feeding port through which the conveying mechanism can convey the heavy drill pipe into the welding box body. On one side in the rear of the welding box body, there is a discharging port through which one end of the heavy drill pipe can extend out of the welding box body. Above the inner part of the welding box body, there is a welding torch which is controlled by a servo motor and can move in the vertical direction and the horizontal front-back direction. Inside the rear part of the welding box body, there is a three-jaw chuck which is rotatably arranged for clamping the heavy drill pipe and can be controlled to rotate.

[0009] The supporting device is arranged at the outer rear of the welding mechanism and is used to support one end of the heavy drill pipe extending out of the welding box body.

[0010] In an optional implementation manner, the conveying mechanism includes at least one conveying roller assembly for horizontally conveying the heavy drill pipe back and forth and at least one supporting roller assembly for auxiliary support during the conveying process of the heavy drill pipe.

[0011] The conveying roller assembly can convey the heavy drill pipe under the drive of a transmission system. The supporting roller assembly and the conveying roller assembly are arranged in front of the outer part of the welding box body in the conveying direction of the heavy drill pipe and are located below the heavy drill pipe. The supporting roller assembly, the conveying roller assembly, the welding box body and the supporting device are distributed in a straight line.

[0012] In an optional implementation manner, the conveying roller assembly and the supporting roller assembly are alternately arranged in the conveying direction of the heavy drill pipe. The conveying roller assembly, the supporting roller assembly and the supporting device are all equipped with hydraulic lifting systems for height adjustment.

[0013] In an optional implementation manner, the conveying roller assembly includes a V-shaped conveying roller, a speed reducer, a motor, a conveying roller bracket and a conveying roller assembly base. The motor is connected to the speed reducer through a coupling and together with the speed reducer forms a transmission system that can transmit power to the conveying roller. The motor and the speed reducer are fixedly installed on the conveying roller bracket. The V-shaped conveying roller is arranged on the conveying roller bracket and is connected to the output end of the speed reducer. Both sides of the bottom end of the conveying roller bracket are connected to the conveying roller assembly base through two vertical columns. On the conveying roller assembly base, there is a hydraulic cylinder for adjusting the height of the V-shaped conveying roller. The bottom end of the conveying roller bracket is fixedly connected to the output end of the hydraulic cylinder.

[0014] The supporting roller assembly includes a supporting roller bracket, supporting rollers and a base of the supporting roller assembly. Two symmetrically distributed supporting rollers are arranged on the supporting roller bracket. Each supporting roller is mounted on the supporting roller bracket through a bearing. A bearing seat for fixing the supporting roller is mounted on the supporting roller bracket. The outer surface of the supporting roller is a smooth circular structure and can contact the surface of the heavy drill pipe to provide support. Both sides of the bottom end of the supporting roller bracket are connected to the base of the supporting roller assembly through two vertical columns. A hydraulic cylinder for adjusting the height of the supporting roller is arranged on the base of the supporting roller assembly. The bottom end of the supporting roller bracket is fixedly connected to the output end of the hydraulic cylinder.

[0015] In an alternative embodiment, the supporting device is a supporting roller assembly. The supporting roller assembly includes a supporting roller bracket, a supporting base and two supporting rollers symmetrically arranged obliquely on the supporting roller bracket. The inclination directions of the two supporting rollers are mirror images of each other, having a distribution structure with the upper parts close and the lower parts far away. The two supporting rollers are symmetrically distributed around the axis of the heavy drill pipe. A spherical universal support structure is arranged at the center of the top end of the supporting roller. The spherical universal support structure uses a spherical universal bearing that can rotate flexibly and can contact the surface of the heavy drill pipe with the steel balls facing outwards; both sides of the bottom end of the supporting roller bracket are connected to the supporting base through two vertical columns. A hydraulic cylinder for adjusting the height of the supporting roller is arranged on the supporting base. The bottom end of the supporting roller bracket is fixedly connected to the output end of the hydraulic cylinder.

[0016] In an alternative embodiment, the welding mechanism further includes a welding machine capable of performing plasma spray welding and a wire feeding mechanism for feeding welding materials to the welding torch. The welding machine is arranged on the ground outside the welding box body. The wire feeding mechanism is fixedly installed on the outer wall of the welding box body.

[0017] In an alternative embodiment, a blower for discharging the fumes and hot air generated during the plasma spray welding operation in the welding box body is fixedly installed on the top of the welding box body.

[0018] In an alternative embodiment, the welding machine uses a plasma arc welding machine.

[0019] In an alternative embodiment, the model of the welding machine is XD600GⅡ.

[0020] In an alternative embodiment, the welding torch is installed on a welding torch bracket inside the welding box body. A moving mechanism for connecting the welding torch bracket is fixedly installed on one side above the inside of the welding box body. The welding torch bracket can move in the vertical direction and the horizontal front-back direction under the drive of the moving mechanism.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] 1. The plasma spray welding device for the wear-resistant band of the heavy drill pipe provided by this application has a conveying mechanism arranged in front of the welding mechanism. It can not only convey the heavy drill pipe to the welding box body, but also support the heavy drill pipe during the plasma spray welding process of the wear-resistant band. At the same time, the other end of the heavy drill pipe extends out of the welding box body and can be additionally supported by the support device behind the welding box body, so that the heavy drill pipe will not sink or shake randomly during the spray welding process, which is conducive to improving the stability and better carrying out the spray welding process in the welding box body.

[0023] 2. This application arranges the welding mechanism between the conveying mechanism and the support device. The three-jaw chuck is used to clamp the heavy drill pipe and control its rotation. The three-jaw chuck can not only firmly fix the heavy drill pipe, but also ensure the stable rotation of the heavy drill pipe during the welding process. At the same time, with the support of the conveying mechanism and the support device at both ends, the heavy drill pipe always maintains balance during the rotation process, which can avoid the spray welding deviation caused by uneven rotation of the heavy drill pipe, reduce the intervention of human factors and improve the operation safety. In addition, the welding torch is controlled by a servo motor and can move flexibly in the vertical and horizontal directions, thus ensuring the accuracy of the spray welding. This reasonable structural layout and support method make the spray welding operation of the wear-resistant band faster and are conducive to improving the welding quality of the wear-resistant band. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the plasma spray welding device for the wear-resistant band of the heavy drill pipe provided by an embodiment of this application;

[0026] Figure 2 It is a front view schematic diagram of the welding box body provided by an embodiment of this application;

[0027] Figure 3 It is a rear view schematic diagram of the welding box body provided by an embodiment of this application;

[0028] Figure 4 It is a schematic diagram of the moving mechanism provided by an embodiment of this application;

[0029] Figure 5 It is a schematic diagram of the inside of the welding box body provided by an embodiment of this application;

[0030] Figure 6 It is a schematic diagram of the structure of the conveying roller assembly provided by an embodiment of this application;

[0031] Figure 7 Schematic structural diagram of the carrier roller assembly provided by an embodiment of the present application;

[0032] Figure 8 Schematic structural diagram of the idler roller assembly provided by an embodiment of the present application.

[0033] In the figure:

[0034] 100, heavy drill pipe; 200, welding mechanism; 210, welding box body; 211, feed inlet; 212, discharge outlet; 220, welding torch; 221, welding torch support; 222, moving mechanism; 2221, vertical guide rail; 2222, horizontal guide rail; 230, three-jaw chuck; 240, welding machine; 250, wire feeding mechanism; 300, supporting device; 310, idler roller support; 320, supporting base; 330, idler roller; 331, spherical universal bearing; 400, conveying roller assembly; 410, V-shaped conveying roller; 420, reducer; 430, motor; 440, conveying roller support; 450, conveying roller assembly base; 500, carrier wheel assembly; 510, carrier wheel support; 520, carrier wheel; 530, carrier wheel assembly base; 600, blower; 700, operation panel; 800, sliding door; 810, observation window; 900, lifting operation platform. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts also belong to the scope of protection of the present application.

[0036] Please refer to Figures 1-8 , in which Figure 1 is the overall structural diagram of the plasma spray welding device for the wear-resistant band of the heavy drill pipe provided by an embodiment of the present application; Figure 2 is the front side schematic diagram of the welding box body provided by an embodiment of the present application; Figure 3 is the rear side schematic diagram of the welding box body provided by an embodiment of the present application; Figure 4 is the schematic diagram of the moving mechanism provided by an embodiment of the present application; Figure 5 is the internal schematic diagram of the welding box body provided by an embodiment of the present application; Figure 6 is the structural schematic diagram of the conveying roller assembly provided by an embodiment of the present application; Figure 7 is the structural schematic diagram of the carrier wheel assembly provided by an embodiment of the present application; Figure 8 is the structural schematic diagram of the idler roller assembly provided by an embodiment of the present application. As Figures 1-3As shown in the figure, the plasma spray welding device for the wear-resistant band of the heavy drill pipe provided by the embodiment of the present application includes a conveying mechanism, a welding mechanism 200, and a supporting device 300; among them, the conveying mechanism is arranged on the outer front side of the welding mechanism 200 and is used to guide and convey the heavy drill pipe 100 into the welding mechanism 200; the welding mechanism 200 is arranged between the conveying mechanism and the supporting device 300, and the welding mechanism 200 includes a welding box body 210, as Figure 2 and Figure 5 shown, a feed port 211 through which the conveying mechanism can convey the heavy drill pipe 100 into the welding box body 210 is opened on the front side of the welding box body 210, as Figure 3 and Figure 5 shown, a discharge port 212 through which one end of the heavy drill pipe 100 can extend out of the welding box body 210 is opened on the rear side of the welding box body 210, as Figure 4 and Figure 5 shown, a welding torch 220 is arranged above the inner part of the welding box body 210, and the welding torch 220 is controlled by a servo motor and can move in the vertical direction and the horizontal front and rear directions. A three-jaw chuck 230 for clamping the heavy drill pipe 100 and capable of being controlled to rotate is rotatably arranged at the rear of the inner part of the welding box body 210; the supporting device 300 is arranged at the outer rear of the welding mechanism 200 and is used to support one end of the heavy drill pipe 100 extending out of the welding box body 210. The three-jaw chuck 230 is composed of three evenly distributed jaws. When the three-jaw chuck 230 works, the clamping control of the workpiece can be realized by using existing technical means. Specifically, the three-jaw chuck 230 can be driven to work by a motor or a hydraulic system. When the driving system (usually a motor or a hydraulic system) of the three-jaw chuck 230 works, the three jaws contract or open synchronously, so as to firmly clamp the heavy drill pipe 100 at the central position. This synchronous contraction and opening action ensures that the heavy drill pipe 100 is always on the axis, avoiding eccentricity and imbalance phenomena. The rotation of the three-jaw chuck 230 can be controlled by a servo motor or a variable-frequency motor. By controlling its precise rotation, the welding torch 220 can apply a uniform arc on the surface of the heavy drill pipe 100, so as to achieve high-quality welding.

[0037] In the plasma spray welding device for the wear-resistant band of the heavy drill pipe provided by the embodiment of the present application, the conveying mechanism is arranged in front of the welding mechanism 200, which can not only realize the conveyance of the heavy drill pipe 100 to the welding box body 210, but also support the heavy drill pipe 100 during the process of spray welding the wear-resistant band on the heavy drill pipe 100. At the same time, the other end of the heavy drill pipe 100 extends out of the welding box body 210 and can be additionally supported by the supporting device 300 behind the welding box body 210, so that the heavy drill pipe 100 will not sink or shake randomly during the spray welding process, which is beneficial to improving the stability and better carrying out spray welding processing in the welding box body 210.

[0038] The plasma spray welding device for the wear-resistant band of the heavy drill pipe in the embodiment of the present application arranges the welding mechanism 200 between the conveying mechanism and the supporting device 300. The three-jaw chuck 230 is used to clamp the heavy drill pipe 100 and control its rotation. The three-jaw chuck 230 can not only firmly fix the heavy drill pipe 100, but also ensure the stable rotation of the heavy drill pipe 100 during the welding process. At the same time, with the two-end support of the conveying mechanism and the supporting device 300, the heavy drill pipe 100 always maintains balance during rotation, which can avoid the spray welding deviation caused by uneven rotation of the heavy drill pipe 100, reduce the intervention of human factors and improve the operation safety. In addition, the welding torch 220 is controlled by a servo motor and can move flexibly in the vertical and horizontal directions, thus ensuring the accuracy of spray welding. This reasonable structural layout and support method make the wear-resistant band spray welding operation faster and are beneficial to improving the welding quality of the wear-resistant band.

[0039] In some embodiments, as Figure 1 shown, the conveying mechanism includes at least one conveying roller assembly 400 for horizontally conveying the heavy drill pipe 100 back and forth and at least one supporting roller assembly 500 for providing auxiliary support during the conveying process of the heavy drill pipe 100.

[0040] Among them, the conveying roller assembly 400 can convey the heavy drill pipe 100 under the drive of the transmission system. The supporting roller assembly 500 and the conveying roller assembly 400 are arranged in front of the outside of the welding box 210 in the conveying direction of the heavy drill pipe 100 and are located below the heavy drill pipe 100. The supporting roller assembly 500, the conveying roller assembly 400, the welding box 210 and the supporting device 300 are distributed in a straight line.

[0041] In this embodiment, through the combined use of the conveying roller assembly 400 and the supporting roller assembly 500, the conveying mechanism can ensure the smoothness of the heavy drill pipe 100 during conveying. The conveying roller assembly 400 is used to provide the conveying power of the heavy drill pipe 100, while the supporting roller assembly 500 can provide auxiliary support to avoid the heavy drill pipe 100 from sinking or shifting during conveying. In addition, the conveying roller assembly 400 and the supporting roller assembly 500 are arranged along the conveying direction of the heavy drill pipe 100 and are aligned in a straight line with the welding box 210 and the supporting device 300, ensuring that the heavy drill pipe 100 is always in a straight conveying state when entering the welding area and avoiding instability during the conveying process. The design of the conveying mechanism in this way can ensure the smoothness during conveying and the alignment of the heavy drill pipe 100, effectively solving the problem that the heavy drill pipe 100 is prone to instability during long-distance conveying in the prior art when relying solely on the conveying roller.

[0042] In some embodiments, the conveying roller assembly 400 and the supporting roller assembly 500 are alternately arranged in the conveying direction of the heavy drill pipe 100, and the conveying roller assembly 400, the supporting roller assembly 500 and the supporting device 300 are all equipped with a hydraulic lifting system for height adjustment.

[0043] In this embodiment, by adopting the means of alternately arranging the conveying roller assembly 400 and the supporting roller assembly 500, during use, the conveying roller assembly 400 provides power and the supporting roller assembly 500 provides support. The two are alternately arranged, effectively dispersing the weight burden of the heavy drill pipe 100, and can provide uniform support during the conveying process of the heavy drill pipe 100, avoiding unstable conveying due to the excessive weight of the heavy drill pipe 100. At the same time, each of the conveying roller assembly 400 and the supporting roller assembly 500 is equipped with a hydraulic lifting system, which can flexibly adjust the height, so as to better adapt to heavy drill pipes 100 of different specifications.

[0044] As an alternative solution of the embodiment of the present application, as Figure 6 shown, the conveying roller assembly 400 includes a V-shaped conveying roller 410, a speed reducer 420, a motor 430, a conveying roller bracket 440 and a conveying roller assembly base 450. The motor 430 is connected to the speed reducer 420 through a coupling and together with the speed reducer 420 forms a transmission system capable of transmitting power to the conveying roller. The motor 430 and the speed reducer 420 are fixedly installed on the conveying roller bracket 440. The V-shaped conveying roller 410 is arranged on the conveying roller bracket 440 and is connected to the output end of the speed reducer 420. Both sides of the bottom end of the conveying roller bracket 440 are connected to the conveying roller assembly base 450 through two vertical columns. A hydraulic cylinder for adjusting the height of the V-shaped conveying roller 410 is arranged on the conveying roller assembly base 450, and the bottom end of the conveying roller bracket 440 is fixedly connected to the output end of the hydraulic cylinder.

[0045] In this embodiment, the conveying roller assembly 400 can stably convey the heavy drill pipe 100 through the combination of the V-shaped conveying roller 410, the speed reducer 420, and the motor 430. The motor 430 transmits power to the speed reducer 420 through a coupling and finally drives the V-shaped conveying roller 410 to rotate, ensuring that the heavy drill pipe 100 can be axially conveyed at a constant speed. This design of the transmission system ensures the stability of power transmission and the smoothness during the conveying process. In addition, the design of the V-shaped conveying roller 410 enables it to closely fit the cylindrical surface of the heavy drill pipe 100, providing a larger contact area and effectively preventing the heavy drill pipe 100 from slipping or shifting during the conveying process. The speed reducer 420 ensures the control of the conveying speed, enabling the heavy drill pipe 100 to maintain conveying stability even under high loads. Traditional conveying systems usually use flat rollers, while the embodiment of this application adopts the V-shaped conveying roller design, which not only ensures the stability of the heavy drill pipe 100 during conveying but also significantly improves the adaptability to heavy drill pipes 100 with different diameters. This setting method makes the conveying process more stable and avoids the rolling or misalignment problems that may occur to workpieces in traditional designs.

[0046] As Figure 7 shown, the supporting roller assembly 500 includes a supporting roller bracket 510, supporting rollers 520, and a supporting roller assembly base 530. Two symmetrically distributed supporting rollers 520 are provided on the supporting roller bracket 510. Each supporting roller 520 is installed on the supporting roller bracket 510 through a bearing. A bearing seat for fixing the supporting roller 520 is installed on the supporting roller bracket 510. The outer surface of the supporting roller 520 is a smooth circular structure and can contact the surface of the heavy drill pipe 100 to provide support. The two sides at the bottom end of the supporting roller bracket 510 are connected to the supporting roller assembly base 530 through two vertical columns. A hydraulic cylinder for adjusting the height of the supporting roller 520 is provided on the supporting roller assembly base 530. The bottom end of the supporting roller bracket 510 is fixedly connected to the output end of the hydraulic cylinder.

[0047] In this embodiment, both the conveying roller assembly 400 and the supporting roller assembly 500 achieve the height adjustment function through hydraulic cylinders, enabling the device to precisely adjust the height according to the different diameters of the heavy drill pipe 100. The conveying roller bracket 440 is connected to the output end of the hydraulic cylinder, and the supporting roller bracket 510 is connected to the supporting roller assembly base 530 through a hydraulic cylinder, ensuring flexible adjustment during the conveying and supporting processes and ensuring that the heavy drill pipe 100 is always in the best supporting state. It can be seen that the height adjustment function endows the conveying roller assembly 400 and the supporting roller assembly 500 with extremely high flexibility, facilitating adaptation to heavy drill pipes 100 with different diameters and weights. The use of hydraulic cylinders enables the conveying roller assembly 400 and the supporting roller assembly 500 to quickly adjust the height, ensuring that the heavy drill pipe 100 can maintain the best conveying and supporting positions before conveying, during welding, or after welding.

[0048] In addition, in this embodiment, the carrier rollers 520 of the carrier roller assembly 500 are mounted on the carrier roller bracket 510 through bearings, forming a symmetrically distributed support structure. The two carrier rollers 520 are respectively located on both sides of the heavy drill pipe 100. By utilizing the rolling characteristics of the bearings, the friction can be effectively reduced, and at the same time, stable support is provided for the heavy drill pipe 100. This symmetrical arrangement enables the heavy drill pipe 100 to be evenly stressed during the conveying process. Moreover, this design of the carrier roller assembly 500 ensures that the heavy drill pipe 100 is always in a symmetrically supported state during the conveying and welding processes. The symmetrical distribution of the two carrier rollers 520 enables the center of gravity of the heavy drill pipe 100 to be always well maintained at the center line position, further enhancing the stability during the conveying and welding processes. Compared with the traditional single-sided support or unilateral support design, the carrier roller assembly in the embodiment of the present application adopts a symmetrical layout, which not only effectively disperses the weight of the heavy drill pipe 100, but also reduces the friction during the conveying process through the rolling bearings. This design greatly improves the stability and durability during the conveying and welding processes and reduces the wear of the equipment.

[0049] As an alternative solution of the embodiment of the present application, the support device 300 is a carrier roller assembly. As Figure 8 shown, the carrier roller assembly includes a carrier roller bracket 310, a support base 320, and two carrier rollers 330 that are symmetrically arranged obliquely on the carrier roller bracket 310. The inclination directions of the two carrier rollers 330 are mirror images of each other, having a distribution structure with the upper parts close to each other and the lower parts far from each other. The two carrier rollers 330 are symmetrically distributed around the axis of the heavy drill pipe 100. A spherical universal support structure 331 is provided at the center of the top end of the carrier roller 330. The spherical universal support structure 331 adopts a spherical universal bearing that can rotate flexibly and is in contact with the surface of the heavy drill pipe 100 in a manner that the steel balls face outwards; both sides of the bottom end of the carrier roller bracket 310 are connected to the support base 320 through two vertical struts, and a hydraulic cylinder for adjusting the height of the carrier roller 330 is provided on the support base 320. The bottom end of the carrier roller bracket 310 is fixedly connected to the output end of the hydraulic cylinder.

[0050] In this embodiment, the carrier roller assembly of this embodiment adopts a design of oblique symmetrical arrangement, enabling the heavy drill pipe 100 to always maintain balance during the support process. Specifically, the oblique symmetrical design of the two carrier rollers 330 forms a natural V-shaped placement structure, and the center of gravity of the heavy drill pipe 100 naturally falls into the groove, effectively preventing the heavy drill pipe 100 from shifting or becoming unstable during the support process. At the same time, the spherical universal bearing design at the end of the carrier roller 330 enables the carrier roller 330 to flexibly adapt to the movement of the heavy drill pipe 100, providing additional stability. The traditional carrier roller assemblies are usually horizontally arranged, which easily causes instability when the workpiece rotates at high speed or supports a heavier workpiece. However, this solution combines the oblique symmetrical carrier roller design and the spherical universal bearing to ensure the balanced support of the heavy drill pipe 100 and enhance the stability and adaptability of the device.

[0051] In some embodiments, the welding mechanism 200 further includes a welding machine 240 capable of performing plasma spray welding and a wire feeding mechanism 250 for feeding welding materials to the welding torch 220. The welding machine 240 is disposed on the external ground of the welding box body 210, and the wire feeding mechanism 250 is fixedly installed on the outer wall of the welding box body 210. Among them, the welding machine 240 can provide power supply and gas transportation for the welding torch 220. The welding machine 240 and the welding torch 220 are connected by a cable. The welding machine 240 also transmits a shielding gas (such as argon or helium) into the welding torch 220 through a gas transportation pipeline, thereby helping to form a stable plasma arc and protecting the molten pool. The wire feeding mechanism 250 is a device specifically used for continuously supplying welding materials (such as welding wires) to the welding torch 220. The wire feeding mechanism 250 and the welding torch 220 are connected by a welding wire conduit. The welding wire conduit guides the welding wire in the wire feeding mechanism 250 to the wire feeding inlet of the welding torch 220, ensuring that after the welding material melts in the arc area of the welding torch, it can be sprayed onto the surface of the heavy drill pipe 100. The welding machine 240 and the wire feeding mechanism 250 are connected by a signal cable, and the wire feeding speed can be adjusted in real time by relying on the welding machine 240. According to the welding process requirements, the start or stop of the wire feeding mechanism 250 can be determined to ensure that there is always welding material supply when the welding torch is working.

[0052] For the convenience of welding control, optionally, an operation panel 700 is provided on one side of the outside of the welding box body 210. The welding parameters can be adjusted and the movement control of the welding torch 220 can be performed through the operation panel 700. In practical applications, it can be flexibly configured according to the actual situation. In addition, in this embodiment, a sliding door 800 is installed on one side of the outside of the welding box body 210. The sliding door 800 and the operation panel 700 are located on the same side of the outside of the welding box body 210 to facilitate maintenance personnel to enter the welding box body 210 for maintenance and inspection. At the same time, in order to facilitate the user to observe the internal condition of the welding box body 210 in real time during the welding process, an observation window 810 equipped with dark glass is also provided on the side of the welding box body 210 where the sliding door 800 is installed. Specifically, when setting, the observation window 810 can be installed on the sliding door 800. The dark glass can be tempered dark glass (such as low-emissivity Low-E tempered glass) or high-performance heat-resistant dark glass (such as high-silicate glass), which can not only ensure safe observation but also effectively protect the operator's eyes and adapt to the complex environmental conditions during the welding process. At the same time, in order to facilitate centralized control operations of the conveying roller assembly 400, the supporting wheel assembly 500, and the supporting roller assembly during use, in this embodiment, a lifting operation platform 900 is also provided in the area near the conveying mechanism on one side of the outside of the welding box body 210. Control buttons for respectively controlling the lifting and lowering of the conveying roller assembly 400, the supporting wheel assembly 500, and the supporting roller assembly are provided on the lifting operation platform 900 to facilitate the operator to use.

[0053] The welding machine 240 uses a plasma arc welding machine. During use, it can ensure the stable supply of welding materials in cooperation with the wire feeding mechanism 250, effectively improving the welding quality of the heavy drill pipe 100. The wire feeding mechanism 250 is fixedly installed on the outer wall of the welding box body 210, and the welding machine 240 is set on the ground, reducing the occupied space inside the equipment. At the same time, the wire feeding mechanism 250 can supply welding materials more efficiently and accurately, ensuring that the welding torch 220 always has enough welding materials for high-quality welding.

[0054] In some embodiments, a blower 600 for discharging the fumes and hot air generated during the plasma spray welding operation in the welding box body is fixedly installed on the top of the welding box body 210. By installing the blower 600 on the top of the welding box body 210 in this embodiment, the fumes and hot air generated during the welding process can be effectively discharged, ensuring the cleanliness of the operating environment. Moreover, by installing the blower 600 on the top of the welding box body 210, the welding area can be directly exhausted, preventing the fumes and hot air from accumulating in the welding box body 210 and affecting the welding accuracy and the operator's line of sight.

[0055] In some embodiments, the welding machine 240 uses a plasma arc welding machine.

[0056] The welding machine 240 in the embodiment of the present application uses a plasma arc welding machine, which can provide a higher-temperature and more stable arc, ensuring the welding quality of the wear-resistant band. Using a plasma arc welding machine can provide a higher temperature than traditional arc welding, which is more suitable for the welding requirements of high-strength wear-resistant bands, improving the quality of the wear-resistant band of the heavy drill pipe.

[0057] Optionally, the model of the welding machine is XD600GⅡ. This embodiment uses the XD600GⅡ type plasma arc welding machine, which has a high degree of automation and welding accuracy and is suitable for large-scale production applications.

[0058] In some embodiments, the welding torch 220 is installed on the welding torch bracket 221 inside the welding box body 210. A moving mechanism 222 for connecting the welding torch bracket 221 is fixedly installed on one side above the welding box body 210. The welding torch bracket 221 can move vertically and horizontally forward and backward under the drive of the moving mechanism. Such a design ensures that the welding torch 220 can flexibly adjust its position during the welding process to adapt to different welding requirements and ensure the welding accuracy.

[0059] Optionally, the moving mechanism 222 includes a vertical guide rail 2221, a horizontal guide rail 2222, and a servo motor. The vertical guide rail 2221 is fixedly installed on the inner wall of the welding box body 210, the horizontal guide rail 2222 is slidably installed on the vertical guide rail 2221, and the vertical guide rail 2221 and the horizontal guide rail 2222 are respectively driven by the servo motor and can move the welding torch bracket 221 and the welding torch 220 vertically and horizontally forward and backward.

[0060] During the welding process, the welding torch 220 can move freely along two dimensions (vertical and horizontal front-back directions) through the cooperation of the vertical guide rail 2221 and the horizontal guide rail 2222. During use, it can flexibly adjust its position according to the welding requirements to achieve high-precision welding of different parts of the heavy drill pipe 100. Compared with the design in the traditional welding system where the position of the welding torch is fixed or the adjustment range is limited, in the embodiment of the present application, the vertical guide rail 2221 and the horizontal guide rail 2222 driven by a servo motor ensure that the welding torch 220 can perform precise multi-dimensional movement within the welding area. Even if the size of the heavy drill pipe 100 changes within a certain range, the welding torch 220 can quickly respond and adjust its position.

[0061] In addition, the vertical guide rail 2221 and the horizontal guide rail 2222 in this embodiment are respectively driven by servo motors, and the moving mechanism 222 uses servo motors, which can precisely control the position of the welding torch 220, enabling the welding torch 220 to move precisely in both the vertical and horizontal directions. This high-precision control enables the welding torch 220 to always maintain the best distance from the heavy drill pipe 100 during the welding process, ensuring the uniformity of welding and the consistency of welding quality. Moreover, the moving mechanism 222 using servo motors can not only quickly respond to instructions but also precisely adjust the position of the welding torch, ensuring that each movement of the welding torch can meet the high-precision requirements. This is particularly important in large-scale and continuous welding operations, avoiding the problem of uneven welding caused by manual adjustment of the position of the welding torch.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A plasma spray welding device for wear-resistant bands of heavy drill pipes, characterized in that, It includes a conveying mechanism, a welding mechanism (200) and a supporting device (300); The conveying mechanism is arranged on the outer front side of the welding mechanism (200) and is used to guide and convey the heavy drill pipe (100) into the welding mechanism (200); The welding mechanism (200) is arranged between the conveying mechanism and the supporting device (300). The welding mechanism (200) includes a welding box body (210). An inlet (211) through which the conveying mechanism can convey the heavy drill pipe (100) into the welding box body (210) is provided on the front side of the welding box body (210). An outlet (212) through which one end of the heavy drill pipe (100) can extend out of the welding box body (210) is provided on the rear side of the welding box body (210). A welding torch (220) is arranged above the inside of the welding box body (210). The welding torch (220) is controlled by a servo motor and can move in the vertical direction and the horizontal front-back direction. A three-jaw chuck (230) for clamping the heavy drill pipe (100) and capable of being controlled to rotate is rotatably arranged at the rear of the inside of the welding box body (210); The supporting device (300) is arranged on the outer rear of the welding mechanism (200) and is used to support one end of the heavy drill pipe (100) extending out of the welding box body (210).

2. The plasma spray welding device for the wear-resistant band of the heavy drill pipe according to claim 1, characterized in that, The conveying mechanism includes at least one conveying roller assembly (400) for horizontally conveying the heavy drill pipe (100) back and forth and at least one supporting roller assembly (500) for auxiliary support during the conveying of the heavy drill pipe (100); The conveying roller assembly (400) can convey the heavy drill pipe (100) under the drive of a transmission system. The supporting roller assembly (500) and the conveying roller assembly (400) are arranged on the outer front of the welding box body (210) and below the heavy drill pipe (100) according to the conveying direction of the heavy drill pipe (100). The supporting roller assembly (500), the conveying roller assembly (400), the welding box body (210) and the supporting device (300) are distributed in a straight line; 3. The plasma spray welding device for the wear-resistant band of the heavy drill pipe according to claim 2, characterized in that, The conveying roller assembly (400) and the supporting roller assembly (500) are arranged alternately in the conveying direction of the heavy drill pipe (100). The conveying roller assembly (400), the supporting roller assembly (500) and the supporting device (300) are all equipped with a hydraulic lifting system for height adjustment.

4. The plasma spray welding device for the wear-resistant band of the heavy drill pipe according to claim 2 or 3, characterized in that, The conveying roller assembly (400) includes a V-shaped conveying roller (410), a speed reducer (420), a motor (430), a conveying roller support (440), and a conveying roller assembly base (450). The motor (430) is connected to the speed reducer (420) through a coupling and, together with the speed reducer (420), forms a drive system capable of transmitting power to the conveying roller. The motor (430) and the speed reducer (420) are fixedly installed on the conveying roller support (440). The V-shaped conveying roller (410) is arranged on the conveying roller support (440) and is connected to the output end of the speed reducer (420). Both sides of the bottom end of the conveying roller support (440) are connected to the conveying roller assembly base (450) through two vertical columns. A hydraulic cylinder for adjusting the height of the V-shaped conveying roller (410) is arranged on the conveying roller assembly base (450), and the bottom end of the conveying roller support (440) is fixedly connected to the output end of the hydraulic cylinder. The supporting roller assembly (500) includes a supporting roller support (510), supporting rollers (520), and a supporting roller assembly base (530). Two symmetrically distributed supporting rollers (520) are arranged on the supporting roller support (510). Each supporting roller (520) is installed on the supporting roller support (510) through a bearing. A bearing seat for fixing the supporting roller (520) is installed on the supporting roller support (510). The outer surface of the supporting roller (520) is a smooth circular structure and can contact the surface of the heavy drill pipe (100) to provide support. Both sides of the bottom end of the supporting roller support (510) are connected to the supporting roller assembly base (530) through two vertical columns. A hydraulic cylinder for adjusting the height of the supporting roller (520) is arranged on the supporting roller assembly base (530), and the bottom end of the supporting roller support (510) is fixedly connected to the output end of the hydraulic cylinder.

5. The plasma spray welding device for the wear-resistant band of the heavy drill pipe according to any one of claims 1-3, characterized in that, The supporting device (300) is a supporting roller assembly. The supporting roller assembly includes a supporting roller support (310), a supporting base (320), and two supporting rollers (330) that are symmetrically arranged obliquely on the supporting roller support (310). The inclination directions of the two supporting rollers (330) are mirror images of each other, with a distribution structure where the upper parts are close and the lower parts are far apart. The two supporting rollers (330) are symmetrically distributed around the axis of the heavy drill pipe (100). A spherical universal support structure (331) is provided at the center of the top end of the supporting roller (330). The spherical universal support structure (331) uses a spherical universal bearing that can rotate flexibly and contacts the surface of the heavy drill pipe (100) with the steel balls facing outwards. Both sides of the bottom end of the supporting roller support (310) are connected to the supporting base (320) through two vertical columns. A hydraulic cylinder for adjusting the height of the supporting roller (330) is arranged on the supporting base (320), and the bottom end of the supporting roller support (310) is fixedly connected to the output end of the hydraulic cylinder.

6. The plasma spray welding device for the wear-resistant band of the heavy drill pipe according to any one of claims 1-3, characterized in that, The welding mechanism (200) further includes a welding machine (240) capable of performing plasma spray welding and a wire feeding mechanism (250) for feeding welding materials to the welding torch (220). The welding machine (240) is arranged on the external ground of the welding box body (210), and the wire feeding mechanism (250) is fixedly installed on the outer wall of the welding box body (210).

7. The plasma spray welding device for the wear-resistant band of the heavy drill pipe according to any one of claims 1-3, characterized in that, A blower (600) for discharging the soot and hot air generated during the plasma spray welding operation in the welding box body is fixedly installed on the top of the welding box body (210).

8. The plasma spray welding device for the wear-resistant band of the heavy drill pipe according to claim 6, characterized in that, The welding machine (240) is a plasma arc welding machine.

9. The plasma spray welding device for the wear-resistant band of the heavy drill pipe according to claim 8, wherein The model of the welding machine is XD600GⅡ.

10. The plasma spray welding device for the wear-resistant band of the heavy drill pipe according to claim 6, characterized in that, The welding torch (220) is installed on a torch support (221) inside the welding box body (210). A moving mechanism (222) for connecting the torch support (221) is fixedly installed on one side above the interior of the welding box body (210). The torch support (221) can move in the vertical direction and the horizontal front-back direction under the drive of the moving mechanism.

Images