A drilling rig component welding apparatus

Abstract

The present application relates to the technical field of drilling rig component welding, in particular to a drilling rig component welding device, comprising: an adjusting mechanism is arranged on a drill rod, a locking mechanism is arranged on the adjusting mechanism, and a stop mechanism is arranged on the locking mechanism; the present application can realize fast and close installation of special molds on the outer side of the drill rod, stable alignment of front and rear molds, fast limiting and locking of key strips, complete avoidance of relative deviation between molds and gap cooperation between key strips, limiting grooves and the outer wall of the drill rod, significant improvement of positioning accuracy, flexible adaptation of different models of drill rods and key strips, effective reduction of frequent replacement of molds in small-batch, multi-variety production or on-site repair and rework scenes, further improvement of the advantages of fast response and flexible adjustment of manual welding, and significant improvement of overall operation and processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of drilling rig component welding technology, specifically to a drilling rig component welding device. Background Technology

[0002] Drilling rigs typically drive drilling tools to drill underground for mineral exploration or engineering construction. As a key component of the drilling rig, the drill rod often has multiple axially distributed raised key bars welded to its outer wall. These key bars, in conjunction with keyways, can transmit power and motion to the drill bit to achieve rock breaking operations. In small-batch, multi-variety production or on-site repair and rework, manual welding of key bars is highly flexible and can effectively balance operational efficiency and cost control.

[0003] In the existing technology, when manually welding the key strips on the outer wall of the drill rod, two sets of special molds are usually first placed on both ends of the drill rod, and then each key strip is inserted into the corresponding limiting groove of the mold in sequence to quickly position it in the required position; then the key strips are fixed to the outer wall of the drill rod by spot welding. After removing the molds, the key strips are then welded as a whole by hand with a welding gun.

[0004] However, the traditional method of manually welding the key bars on the outer wall of the drill pipe has the following problems: 1. In the existing technology, for ease of loading and unloading, clearance fits are used between the special mold and the drill pipe, key bars, and between the limiting groove and the outer wall of the drill pipe. Although multiple clearance fits improve the efficiency of assembly operations, they also lead to the accumulation of errors at each level, making it difficult to unify the positioning reference of each key bar. At the same time, welding key bars under unstable constraint conditions not only directly affects the welding accuracy and consistency of the key bars, but also affects the normal assembly and power transmission of the subsequent drill pipe and key bars. 2. In the existing technology, the special molds used can usually only be adapted to specific models of drill pipes and key bars. When facing small-batch, multi-variety production tasks or on-site repair and rework scenarios, it is often necessary to frequently change the corresponding mold according to the workpiece specifications. This not only weakens the advantages of rapid response and flexible adjustment that manual welding should have, but also affects the overall processing efficiency to a certain extent. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drilling rig component welding device, comprising a drill rod and a keyway, wherein the drill rod is provided with an adjustment mechanism, the adjustment mechanism is provided with a locking mechanism, and the locking mechanism is provided with a stop mechanism.

[0006] The adjustment mechanism includes an adjustment guide part arranged at the front and rear of the drill pipe on the outside, an adjustment drive part arranged on the adjustment guide part, and a positioning alignment part arranged on the adjustment drive part.

[0007] The locking mechanism includes a driven centering part disposed on the adjusting mechanism, the driven centering part being provided with a guiding fitting part and a pressing fitting part, and the guiding fitting part being provided with a centering movement part.

[0008] The stopping mechanism includes a movable locking part disposed on the locking mechanism, and a guide locking part is disposed on both the locking mechanism and the movable locking part.

[0009] Preferably, the adjusting guide part includes a guide frame disposed on the outside of the drill pipe, a guide groove is provided on the guide frame, guide plates are fixedly disposed on both the front and rear sides of the guide frame, and arc-shaped sliding grooves are symmetrically provided on the left side of the guide frame.

[0010] Preferably, the adjustment drive unit includes a drive ring rotatably mounted on the guide frame, and the drive ring has an arc-shaped drive groove.

[0011] Preferably, the positioning and alignment part includes positioning rods symmetrically fixed on the left side of the drive ring, one end of the positioning rod is threaded with a nut, and the positioning rods on opposite sides of the two drive rings are threaded together with an internal thread sleeve.

[0012] Preferably, the driven pair includes a driven shaft slidably disposed in the guide groove, with movable plates symmetrically fixedly disposed at the front and rear of the driven shaft, and a fixed plate fixedly disposed at one end of the two movable plates, with guide rods symmetrically fixedly disposed at the front and rear of the fixed plate, and positive and negative lead screws rotatably disposed on the fixed plate between the guide rods.

[0013] Preferably, the guiding and bonding part includes two U-shaped frames that are symmetrically slidably arranged on two guide rods, and bonding rollers are rotatably arranged on opposite sides of the two U-shaped frames. A locking disc is fixedly arranged at the upper end of the bonding rollers.

[0014] Preferably, the centering moving part includes a U-shaped wheel seat fixedly mounted on a U-shaped frame, a moving wheel rotatably mounted inside the U-shaped wheel seat, and a threaded seat fixedly mounted on the upper side of the U-shaped wheel seat for threaded connection with the positive and negative lead screws.

[0015] Preferably, the pressing and bonding part includes a slide rod slidably disposed on the fixed plate, a U-shaped frame 2 fixedly disposed on the lower side of the slide rod, a bonding roller 2 rotatably disposed on the lower side of the U-shaped frame 2, a connecting plate fixedly disposed on the upper side of the slide rod 1, and a screw rod 1 rotatably disposed on the upper side of the fixed plate and threadedly connected to the connecting plate.

[0016] Preferably, the movable locking part includes a second screw rod rotatably mounted on a U-shaped wheel seat, an adjusting frame threadedly connected to the second screw rod, and a locking rod fixedly mounted at the lower end of the adjusting frame.

[0017] Preferably, the guide locking part includes a slide rod two fixedly mounted on the adjusting frame, a wedge-shaped platform fixedly mounted on the side of the slide rod two away from the corresponding adjusting frame, a spring rod elastically slidably mounted on the upper end of the U-shaped frame one, a locking plate fixedly mounted on the lower side of the spring rod, and a wedge-shaped strip fixedly mounted on the upper side of the spring rod, the wedge-shaped strip engaging with the corresponding wedge-shaped platform.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention, through the cooperation of the adjustment mechanism, the locking mechanism and the stop mechanism, can realize the rapid and tight installation of the special mold on the outside of the drill rod and the stable alignment of the front and rear molds. At the same time, it can realize the rapid limiting and locking of the key strip. While ensuring the loading and unloading efficiency, it completely avoids the relative deviation between the molds and the gap fit between the key strip and the limiting groove and the outer wall of the drill rod, which significantly improves the positioning accuracy, thereby ensuring the accuracy and consistency of welding, and ensuring the reliable assembly and power transmission of the subsequent drill rod key strip.

[0019] 2. Through the coordination of the adjustment mechanism, locking mechanism and stop mechanism, this invention can also flexibly adapt to different models of drill rods and key bars. In scenarios such as small batch and multi-variety production or on-site maintenance and rework, it can effectively reduce the frequent replacement of molds, further amplify the advantages of rapid response and flexible adjustment of manual welding, and thus significantly improve the overall operation and processing efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the adjustment mechanism.

[0022] Figure 3 A schematic diagram of the adjustable guide section structure.

[0023] Figure 4 This is a schematic diagram of the adjustment drive unit structure.

[0024] Figure 5 This is a partial cross-sectional schematic diagram of the positioning and alignment section structure.

[0025] Figure 6 This is a schematic diagram of the locking mechanism.

[0026] Figure 7 This is a schematic diagram of a partial cross-section of the central part of the driven structure.

[0027] Figure 8 This is a side sectional view of the guide bonding structure.

[0028] Figure 9 This is a schematic front cross-sectional view of the moving part structure.

[0029] Figure 10 This is a side sectional view of the pressing and bonding structure.

[0030] Figure 11 A front sectional view of the stop mechanism structure.

[0031] Figure 12 for Figure 11Enlarged structural diagram at point A in the middle.

[0032] In the diagram: 1. Drill pipe; 2. Keyway; 3. Adjustment mechanism; 31. Adjustment guide part; 311. Guide frame; 312. Guide groove; 313. Guide plate; 314. Arc-shaped slide groove; 32. Adjustment drive part; 321. Drive ring; 322. Arc-shaped drive groove; 33. Positioning and alignment part; 331. Positioning rod; 332. Nut; 333. Internal threaded sleeve; 4. Locking mechanism; 41. Driven centering part; 411. Driven shaft; 412. Moving plate; 413. Fixed plate; 414. Guide rod; 415. Positive and negative lead screws; 42. Guide fitting part; 4 21. U-shaped frame one; 422. Laminating roller one; 423. Locking disc; 43. Centering moving part; 431. U-shaped wheel seat; 432. Moving wheel; 433. Threaded seat; 44. Pressing and bonding part; 441. Slide rod one; 442. U-shaped frame two; 443. Laminating roller two; 444. Connecting plate; 445. Screw one; 5. Stopping mechanism; 51. Moving locking part; 511. Screw two; 512. Adjusting frame; 513. Locking rod; 52. Guide locking part; 521. Slide rod two; 522. Wedge platform; 523. Locking plate; 524. Wedge strip. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1 A welding device for drilling rig components includes a drill rod 1 and a plurality of key bars 2 extending axially along the drill rod 1 and evenly distributed circumferentially on the outer wall of the drill rod 1. An adjustment mechanism 3 is provided on the drill rod 1, a locking mechanism 4 is provided on the adjustment mechanism 3, and a stop mechanism 5 is provided on the locking mechanism 4.

[0035] Please see Figure 1 and Figure 2 The adjustment mechanism 3 includes an adjustment guide part 31 symmetrically arranged on the outside of the drill rod 1 for guiding and limiting. The adjustment guide part 31 is provided with an adjustment drive part 32 for driving radial movement. The adjustment drive part 32 is provided with a positioning alignment part 33 for stably aligning the front and rear symmetrical adjustment guide part 31 and the adjustment drive part 32.

[0036] Please see Figure 2 and Figure 3The adjusting guide part 31 includes an annular guide frame 311 disposed on the outside of the drill rod 1 and adjustable to move back and forth along the axial direction of the drill rod 1. An annular rotating groove is provided on the outer arc surface of the guide frame 311. Multiple guide grooves 312 are uniformly provided on the guide frame 311 in the circumferential direction, extending through the front and rear and radially along the guide frame 311. Multiple sets of guide plates 313 are uniformly fixed on the front and rear sides of the guide frame 311 in the circumferential direction. Each set is composed of guide plates 313 symmetrically distributed along the width direction of the corresponding guide groove 312. Arc-shaped sliding grooves 314 are symmetrically provided on the left side of the guide frame 311.

[0037] Please see Figure 2 , Figure 4 and Figure 7 The adjustment drive unit 32 includes a drive ring 321 rotatably disposed in a rotating groove on the guide frame 311. The drive ring 321 has a plurality of arc-shaped drive grooves 322 that are evenly distributed in the circumferential direction and pass through the front and back. The arc-shaped drive grooves 322 correspond one-to-one with the guide grooves 312.

[0038] Please see Figure 2 , Figure 4 and Figure 5 The positioning and alignment part 33 includes a positioning rod 331 that is symmetrically fixed on the left side of the drive ring 321 by a support and slidably connected to the corresponding arc-shaped slide groove 314. The end of the positioning rod 331 away from the corresponding drive ring 321 is threaded with a nut 332. The positioning rods 331 on opposite sides of the two symmetrical drive rings 321 are threaded together with an internal thread sleeve 333.

[0039] When locking the relative position between the drive ring 321 and the corresponding guide frame 311, tighten each nut 332 to move it along the corresponding positioning rod 331 toward the corresponding guide frame 311 until the nut 332 and the corresponding surface of the guide frame 311 are tightly fitted and locked. The locking engagement of the nut 332 and the guide frame 311 through the frictional resistance prevents the positioning rod 331 from sliding along the arc-shaped slide groove 314, thereby locking the relative position between the drive ring 321 and the corresponding guide frame 311.

[0040] Please see Figure 1 and Figure 6 The locking mechanism 4 includes a driven centering part 41 for synchronous centripetal movement adjustment, which is jointly provided on the adjusting guide part 31 and the adjusting drive part 32. The driven centering part 41 is provided with a guiding fitting part 42 for tight positioning and guidance along the width direction of the key bar 2 and a pressing fitting part 44 for stably pressing and fitting the key bar 2 to the outer wall of the drill rod 1. The guiding fitting part 42 is provided with a centering moving part 43 for tightly fitting and locking the outer wall of the drill rod 1 and for assisting the adjusting mechanism 3 to move stably back and forth along the axial direction of the drill rod 1.

[0041] Please see Figure 6 and Figure 7 The driven pair 41 includes a driven shaft 411 that is slidably disposed in the corresponding guide groove 312 and press-fitted with the corresponding arc-shaped drive groove 322. The driven shaft 411 is symmetrically fixed with two corresponding symmetrical guide plates 313 that are slidably connected and move radially along the guide frame 311. The two symmetrical moving plates 412 are fixed with a fixed plate 413 at one end near the axis of the guide frame 311. A guide rod 414 is symmetrically fixed with the fixed plate 413 on the side away from the corresponding moving plate 412 through a support two. A positive and negative screw 415 is rotatably disposed between the two corresponding guide rods 414 on the side of the fixed plate 413 away from the corresponding moving plate 412 through a support three. A knob one is symmetrically fixed with the positive and negative screw 415 on the left and right sides.

[0042] When each fixed plate 413 is to move synchronously toward the axis of the corresponding guide frame 311, the corresponding positioning rod 331 is first slid upward along the arc-shaped slide groove 314. The positioning rod 331 then drives the corresponding drive ring 321 and all the arc-shaped drive grooves 322 on it to rotate synchronously in the direction of orientation. Each arc-shaped drive groove 322 then engages with the corresponding driven shaft 411 to drive the driven shaft 411 to move along the axis of the guide frame 311 along the corresponding guide groove 312. Under the drive of the corresponding driven shaft 411 and the limitation of the corresponding guide plate, the guide plate 313 synchronously drives the corresponding fixed plate 413 to move along the axis of the guide frame 311, thereby driving each fixed plate 413 to move synchronously along the axis of the guide frame 311.

[0043] Please see Figure 6 and Figure 8 The guiding and bonding part 42 includes two sets of U-shaped frames 421 that are symmetrically slidably arranged on two symmetrical guide rods 414 through supports 4. Each set consists of U-shaped frames 421 that are symmetrical front and back. The U-shaped frames 421 move left and right along the corresponding guide rods 414. Multiple bonding rollers 422 are evenly rotated on the opposite side of the two symmetrical U-shaped frames 421. A locking disc 423 is fixedly installed at the upper end of the bonding rollers 422.

[0044] Please see Figure 6 , Figure 8 , Figure 9 and Figure 11 The centering moving part 43 includes two symmetrical U-shaped frames 421 with U-shaped wheel seats 431 fixedly installed on opposite sides with downward openings. Moving wheels 432 are symmetrically arranged inside the U-shaped wheel seats 431 and are fixedly installed on the upper side of the U-shaped wheel seats 431. Threaded seats 433 are threadedly connected to the corresponding positive and negative lead screws 415.

[0045] When the guide frame 311 is to be installed on the outer wall of the drill pipe 1, the guide frame 311 is first placed on the outside of the drill pipe 1. Then, the drive ring 321 drives each fixing plate 413 to move synchronously towards the drill pipe 1. The fixing plate 413 then drives the U-shaped frame 421 and the moving wheel 432 in the U-shaped wheel seat 431 to move synchronously until each moving wheel 432 is in close contact with the outer wall of the drill pipe 1 without gap, so as to achieve stable clamping of the outer wall of the drill pipe 1 through each moving wheel 432. Then, the drive ring 321 and the guide frame 311 are locked by the nut 332, so that the guide frame 311 is stably installed on the outer wall of the drill pipe 1. At the same time, the moving wheel 432 also allows the guide frame 311 to move back and forth along the outer wall of the drill pipe 1 for adjustment.

[0046] During the installation of the guide frame 311, the internal threaded sleeve 333, which is threaded between the two corresponding positioning rods 331, can make the two front and rear drive rings 321 rotate synchronously, so that the moving wheels 432 on the front and rear guide frames 311 can synchronously complete the clamping of the same drill rod 1, so as to ensure that the front and rear guide frames 311 can be installed synchronously and that the installation posture of the two guide frames 311 is exactly the same and without relative deviation.

[0047] Before installing the guide frame 311, the positive and negative screws 415 need to be rotated by rotating the knob. The positive and negative screws 415 drive the two corresponding U-shaped wheel seats 431 to move relative to or away from each other along the guide rod 414 through the screw transmission of the corresponding thread seats 433 at both ends. This adjusts the distance between the two symmetrical U-shaped wheel seats 431 and the contact rollers 422 on the U-shaped frame 421, so that the distance between the corresponding contact rollers 422 on both sides can be the same as the width of the key strip 2 that needs to be limited. Thus, after the guide frame 311 is installed, during the process of inserting the key strip 2 into the space between the corresponding contact rollers 422 on both sides, the corresponding contact rollers 422 on both sides can fit tightly with the key strip 2. The rotation of the contact rollers 422 themselves guides the key strip 2 to move and insert along the axial direction of the drill rod 1. This achieves stable limiting of the key strip 2 on both sides without affecting the installation of the key strip 2 at the corresponding position on the outer wall of the drill rod 1.

[0048] It should be noted that the clamping state of the moving wheel 432 on the outer wall of the drill rod 1, the installation posture of the two guide frames 311, and the distance between the corresponding bonding rollers 422 on both sides have all been precisely calculated, adjusted and tested by those skilled in the art, in order to ensure tight and precise limiting and guidance of both sides of the key bar 2.

[0049] Please see Figure 6 , Figure 9 and Figure 10The pressing and bonding part 44 includes a sliding rod 441 that is symmetrically slidably disposed on the corresponding fixed plate 413. The sliding rod 441 slides up and down through the corresponding fixed plate 413. A U-shaped frame 442 with its opening facing downward is fixedly disposed on the lower side of the two symmetrical sliding rods 441. Multiple bonding rollers 443 are evenly rotatably disposed on the lower side of the U-shaped frame 442. A connecting plate 444 is fixedly disposed on the upper side of the two symmetrical sliding rods 441. A screw 445 that is threadedly connected to the connecting plate 444 is rotatably disposed on the upper side of the fixed plate 413. A knob is fixedly disposed on the upper side of the screw 445.

[0050] When the key strip 2 is stably inserted between the corresponding two bonding rollers 422 and made to fully contact the outer wall of the drill rod 1, the screw 445 is rotated by the knob 2. The screw 445 then drives the U-shaped frame 442 and bonding roller 443 on the slide rod 441 to move toward the key strip 2 through the threaded connection with the connecting plate 444. This continues until each bonding roller 443 is in close contact with the surface of the key strip 2 away from the drill rod 1. Each bonding roller 443 can guide the movement of the key strip 2 along the axial direction of the drill rod 1 by its own rotation, so that the surface of the key strip 2 near the drill rod 1 can be stably and tightly in contact with the outer wall of the drill rod 1, and achieve tight positioning of all corresponding surfaces of the key strip 2.

[0051] When completing the insertion and installation of each key bar 2 and the tight positioning of all corresponding surfaces of each key bar 2, first rotate the internal threaded sleeve 333 to completely disengage it from one of the corresponding positioning rods 331. At this time, under the guidance of each key bar 2, the front and rear guide frames 311 can still stably maintain the same installation posture without relative deviation. Then, the two guide frames 311 are moved to the two ends of each key bar 2 by the moving wheel 432, thereby improving the overall positioning stability of the key bar 2.

[0052] The above-described operation method can ensure the efficiency of loading and unloading of structures such as guide frame 311, while completely avoiding relative deviations between guide frames 311 and gap fits between key strip 2 and bonding roller 1 422 and bonding roller 2 443, and between key strip 2 and the outer wall of drill rod 1. This significantly improves positioning accuracy, thereby ensuring the accuracy and consistency of subsequent key strip 2 welding, and ensuring reliable assembly and power transmission of subsequent drill rod 1 and key strip 2. Furthermore, it can flexibly adapt to different models of drill rod 1 and key strip 2, effectively reducing the frequent replacement of molds in scenarios such as small-batch, multi-variety production or on-site maintenance and rework, further amplifying the advantages of rapid response and flexible adjustment of manual welding, thereby significantly improving the overall operation and processing efficiency.

[0053] Please see Figure 1 and Figure 11The stopping mechanism 5 includes a moving locking part 51 provided on the centering moving part 43 for locking the adjusting mechanism 3 so that it cannot move back and forth. The locking mechanism 4 and the moving locking part 51 are both provided with a guide locking part 52 for locking the key bar 2 so that it cannot move back and forth.

[0054] Please see Figure 6 , Figure 9 and Figure 11 The movable locking part 51 includes a screw 2 511 rotatably disposed on the side of the U-shaped wheel seat 431 away from the corresponding U-shaped frame 421. A knob 3 is fixedly disposed on the side of the screw 2 511 away from the corresponding U-shaped wheel seat 431. An adjusting frame 512 that can move left and right is threadedly connected to the screw 2 511. A locking rod 513 that slides left and right through one side of the corresponding U-shaped wheel seat 431 and presses and locks the corresponding movable wheel 432 is symmetrically fixed on the lower end of the adjusting frame 512 near the side of the corresponding U-shaped wheel seat 431.

[0055] After stabilizing and limiting both ends of the key bar 2, first rotate screw 2 511 by knob 3. Screw 2 511 then drives the adjusting frame 512 and locking rod 513 to move towards the corresponding moving wheel 432 through the screw drive with the adjusting frame 512. Until the locking rod 513 is tightly attached to the corresponding surface of the moving wheel 432, the frictional resistance between the locking rod 513 and the moving wheel 432 prevents the moving wheel 432 from continuing to rotate. This locks the guide frame as a whole and prevents it from moving back and forth along the drill rod 1, so that the bonding roller 1 422 and bonding roller 2 443 can always stably limit both ends of the installed key bar 2.

[0056] Please see Figure 11 and Figure 12 The guide locking part 52 includes two slide rods 521 that are symmetrically fixed on the side of the adjustment frame 512 near the corresponding U-shaped wheel seat 431. The slide rods 521 are slidably connected to the upper side of the corresponding U-shaped wheel seat 431 through the support five. The two symmetrical slide rods 521 are fixedly provided with a wedge-shaped platform 522 with an inclined lower side on the side away from the corresponding adjustment frame 512. Multiple spring rods that pass through the top and bottom are evenly elastically slidably provided on the upper end of the U-shaped frame 421. The spring rods correspond one-to-one with the locking discs 423. A locking plate 523 that presses and locks the corresponding locking discs 423 is fixedly provided on the lower side of the spring rod. A wedge-shaped strip 524 with an inclined upper side is fixedly provided on the upper side of all the corresponding spring rods. The wedge-shaped strip 524 is pressed and engaged with the lower inclined side of the corresponding wedge-shaped platform 522 through the upper inclined side.

[0057] During the movement of the locking rod 513 toward the corresponding moving wheel 432, the adjusting frame 512 drives the corresponding wedge platform 522 toward the corresponding wedge strip 524 via the slide rod 521. The wedge platform 522 then drives the wedge strip 524 and its spring rods to move toward the corresponding bonding roller 422 via the pressing action of the inclined surface. The spring rods then drive the corresponding locking plate 523 toward the corresponding locking disc 423 until the locking rod 513 locks the corresponding moving wheel 432. At this time, the locking plate 523 also fits tightly with the corresponding locking disc 423. The frictional resistance between the locking plate 523 and the locking disc 423 prevents the bonding roller 422 from continuing to rotate. The non-rotating bonding roller 422 then tightly clamps and locks the end of the key strip 2 to ensure that the key strip 2 will not move back and forth during the subsequent welding process, thus affecting the welding quality.

[0058] After spot welding and fixing of each locking key bar 2 is completed, the locking of the moving wheel 432 and the bonding roller 422 can be released, so that the guide frame 311 can continue to move along the key bar 2. At this time, a fixing device for assembling the welding gun can be installed on the guide frame 311 (not shown in the figure). Thus, the welding gun is driven by the guide frame 311 to move back and forth stably along the key bar 2 for welding, thereby improving the welding stability of the welding gun.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0060] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A welding device for drilling rig components, comprising a drill rod and a keyway, characterized in that: The drill pipe is equipped with an adjustment mechanism, a locking mechanism, and a stop mechanism. The adjustment mechanism includes an adjustment guide part arranged at the front and rear on the outside of the drill pipe. The adjustment guide part includes a guide frame arranged at the outside of the drill pipe. A guide groove is opened on the guide frame. Guide plates are fixedly arranged on both the front and rear sides of the guide frame. Arc-shaped sliding grooves are symmetrically opened at the front and rear on the left side of the guide frame. An adjustment drive unit is provided on the adjustment guide unit, and the adjustment drive unit includes a drive ring rotatably disposed on the guide frame, and the drive ring is provided with an arc-shaped drive groove. The adjustment drive unit is provided with a positioning and alignment part; the positioning and alignment part includes a positioning rod that is symmetrically fixed on the left side of the drive ring, one end of the positioning rod is threaded with a nut, and the positioning rods on opposite sides of the two drive rings are threaded together with an internal thread sleeve. The locking mechanism includes a driven centering part disposed on the adjusting mechanism. The driven centering part includes a driven shaft slidably disposed in the guide groove. Moving plates are symmetrically fixedly disposed on the driven shaft. A fixed plate is fixedly disposed on one end of the two moving plates. Guide rods are symmetrically fixedly disposed on the fixed plate. Positive and negative lead screws located between the guide rods are rotatably disposed on the fixed plate. The driven pair is provided with a guide bonding part and a pressing bonding part. The guide bonding part includes a U-shaped frame that is symmetrically and slidably arranged on two guide rods. A bonding roller is rotatably arranged on one side of each of the two U-shaped frames. A locking disc is fixedly arranged at the upper end of the bonding roller. The pressing and bonding part includes a slide rod 1 that is slidably mounted on a fixed plate, a U-shaped frame 2 that is fixedly mounted on the lower side of the slide rod, a bonding roller 2 that is rotatably mounted on the lower side of the U-shaped frame 2, a connecting plate that is fixedly mounted on the upper side of the slide rod 1, and a screw rod 1 that is threadedly connected to the connecting plate that is rotatably mounted on the upper side of the fixed plate. The guide fitting part is provided with a centering moving part, which includes a U-shaped wheel seat fixedly installed on a U-shaped frame, a moving wheel rotatably installed in the U-shaped wheel seat, and a threaded seat that is threadedly connected to the positive and negative lead screws on the upper side of the U-shaped wheel seat. The stopping mechanism includes a movable locking part disposed on the locking mechanism. The movable locking part includes a screw rod rotatably disposed on a U-shaped wheel seat. An adjusting frame is threadedly connected to the screw rod, and a locking rod is fixedly disposed at the lower end of the adjusting frame. The locking mechanism and the moving locking part are both provided with a guide locking part. The guide locking part includes a slide rod two fixedly installed on the adjusting frame. A wedge platform is fixedly installed on the side of the slide rod two away from the corresponding adjusting frame. A spring rod is elastically slidably installed on the upper end of the U-shaped frame one. A locking plate is fixedly installed on the lower side of the spring rod. A wedge strip is fixedly installed on the upper side of the spring rod. The wedge strip is press-fitted with the corresponding wedge platform. The adjusting mechanism, in conjunction with the locking mechanism, tightly centers and clamps the outer wall of the drill pipe, forming multiple sets of tightly positioned key bars without affecting the adjustment of the key bars along the axial direction of the drill pipe. Then, the locking mechanism and the adjusting mechanism are adjusted to position the two ends of the key bars without deviation, and the locking mechanism is locked by the stop mechanism, so as to achieve tight and high-precision positioning of each key bar on the outer wall of the drill pipe. In addition, the adjusting mechanism, in conjunction with the locking mechanism, is adjusted to adapt to drill pipes and key bars of different specifications and sizes.

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