Drill bit welding equipment

Abstract

The present application relates to the technical field of welding, and discloses a drill blade welding device, including a shell, on which a moving structure, a welding structure and an inflation structure are provided, the moving structure is used to move the drill bit, the welding structure includes a fixing rod and a heating tube, the fixing rod is arranged on the shell, the inflation structure includes an inflation pipe and a welding pipe, the welding pipe is arranged on the inflation pipe, the welding pipe is arranged on the fixing rod, the heating tube is sleeved outside the welding pipe, the welding pipe is inserted into the drill bit, and the inflation pipe is used to release gas. The present application is arranged on the fixing rod through the welding pipe, when the drill blade and the drill bit abut the fixing rod, the drill blade can be located in the welding pipe, and the welding pipe and the inflation pipe are connected, so that nitrogen can be filled in the welding pipe, reducing the situation of nitrogen floating around, so that the drill blade can be filled with nitrogen during welding, so that the drill blade can be welded more stably, reducing the situation of the drill blade or the drill bit being oxidized during welding, so that the drill blade and the drill bit can be used normally.

Description

Technical Field

[0001] The present application relates to the technical field of welding, and in particular to a drill blade welding device. Background Art

[0002] Drill bits usually refer to cutting tools welded to drill bits. Drill bits are used to break rocks. Drill bit welding equipment can weld drill bits to drill bits to protect them. Usually, during the welding process, drill bits need to be filled with nitrogen to prevent oxidation of the metal surface during the welding process.

[0003] In the related technology, the drill bit welding equipment includes a shell, on which a movable structure, a welding structure and an inflation structure are provided. The movable structure is used to move the drill bit to the welding structure. The inflation structure includes an inflation pipe. The welding structure includes a heating pipe and a fixing rod. The fixing rod is used to fix the drill bit and the drill bit. The heating pipe is sleeved outside the fixing rod. The heating pipe heats and welds the drill bit. At this time, the inflation pipe can fill the heating pipe with nitrogen, so that the drill bit can be stably welded.

[0004] Since nitrogen will float randomly when it is released from the inflation pipe, part of the drill piece may not be filled with nitrogen during the welding process of the drill piece and the drill bit, causing the drill piece and the drill bit to be oxidized during welding, affecting the use of the drill piece and the drill bit. Summary of the invention

[0005] In order to improve the problem that nitrogen is not easy to fill near the welding drill bit, the present application provides a drill bit welding device.

[0006] The present application provides a drill blade welding device, which adopts the following technical solution:

[0007] A drill blade welding device comprises a shell, on which a movable structure, a welding structure and an inflation structure are provided, the movable structure is used to move a drill bit, the welding structure comprises a fixing rod and a heating tube, the fixing rod is arranged on the shell, the inflation structure comprises an inflation pipe and a welding tube, the welding tube is arranged on the inflation pipe, the welding tube is arranged on the fixing rod, the heating tube is sleeved outside the welding tube, the welding tube is for inserting a drill bit, and the inflation pipe is used to release gas.

[0008] By adopting the above technical solution, the welding tube is set on the fixed rod. When the drill piece and the drill bit abut the fixed rod, the drill piece can be located in the welding tube. In addition, the welding tube is connected to the inflation pipe, and the inflation pipe releases gas, so that nitrogen can be filled in the welding tube, reducing the nitrogen from floating around. As a result, the drill piece can be filled with nitrogen during welding, so that the drill piece can be welded more stably, reducing the oxidation of the drill piece or the drill bit during welding, and allowing the drill piece and the drill bit to be used normally.

[0009] Optionally, a fixing strip is provided on the welding tube, a fixing block is provided on the fixing strip, an operating ring is rotatably connected to the inflation pipe, an operating hole is provided on the operating ring for the fixing strip to pass through, a fixing hole is provided on the operating ring for the fixing block to pass through, and the fixing holes are connected to the operating holes; when the fixing block abuts against the operating ring, the welding tube and the inflation pipe are fixed to each other.

[0010] By adopting the above technical solution, the inflation pipe is installed on the welding pipe by passing the fixing bar through the operating hole and the fixing block through the fixing hole, and then the operating ring is rotated so that the fixing hole is not on the disengagement path of the fixing block, so that the fixing block limits the operating ring, so that the welding pipe and the inflation pipe can be fixed to each other, so that the inflation pipe can stably fill the welding pipe with nitrogen.

[0011] Optionally, a stop strip is provided on the fixing rod, and a stop hole for the stop strip to pass through is opened on the welding tube, and the stop hole penetrates to the side of the welding tube; when the stop strip is located in the stop hole, the welding tube is fixed on the fixing rod.

[0012] By adopting the above technical solution, the stop strip passes through one side of the stop hole, so that the fixing rod is located inside the welding pipe, so that the drill bit or the drill bit can abut against the fixing rod inside the welding pipe, and the hole wall of the stop hole limits the stop strip, so that the welding pipe and the fixing rod are fixed to each other, reducing the problem of shaking of the welding pipe due to air flow.

[0013] Optionally, a locking ring is rotatably connected to the welding tube, the locking ring is provided with a through hole for the stop bar to pass through, and the stop bar is provided with a mounting hole for the locking ring to be inserted into; when the locking ring is located in the mounting hole, the locking ring restricts the stop bar from detaching from the stop hole; when the through hole is aligned with the mounting hole, the stop bar can detach from the stop hole.

[0014] By adopting the above technical solution, the locking ring is passed through the mounting hole, and the locking ring is used to limit the stop bar, so that the locking ring and the stop bar can be fixed to each other, reducing the possibility of the locking ring being separated from the stop bar, so that the welding pipe and the inflation pipe can be more stably fixed to each other; at the same time, when the perforation is aligned with the mounting hole, the stop bar can be separated from the stop hole, so that the welding pipe and the inflation pipe can be separated.

[0015] Optionally, a locking groove is provided on the locking ring, and a locking block for inserting into the locking groove is provided on the operating ring; when the inflation pipe is installed on the welding pipe, the locking block is located in the locking groove; when the fixing hole is located on the disengagement path of the fixing block, the mounting hole is aligned with the through hole; when the fixing hole is not on the disengagement path of the fixing block, the locking ring is located in the mounting hole.

[0016] By adopting the above technical solution, the locking block is inserted into the locking groove, and the groove wall of the locking groove limits the locking block, so that the operating ring and the locking ring can rotate synchronously. When the staff drives the operating ring to rotate, the locking ring can rotate to align the mounting hole and the through hole, so that the stop bar can be detached from the through hole, and the inflation pipe and the welding pipe are separated. The locking ring can unlock the stop bar, so that the staff does not need to rotate the locking ring again, reducing the staff's operating steps, so that the staff can quickly separate the welding pipe and the fixing rod; when the fixing hole is not on the disengagement path of the fixing block, the operating ring limits the fixing block, and the locking ring is located in the mounting hole at this time, so that the locking ring limits the stop bar, so that the stop bar is not easy to detach from the stop hole.

[0017] Optionally, a limiting ring is rotatably connected to the welding tube, and a through hole is provided on the limiting ring for the stop bar to pass through, and the limiting ring is located on the moving path of the stop bar to separate from the stop hole; when the limiting ring blocks the stop hole, the stop bar is fixed in the stop hole; when the through hole is aligned with the stop hole, the stop bar can separate from the stop hole.

[0018] By adopting the above technical solution, the limiting ring is rotatably connected to the welding pipe, and the limiting ring is located on the moving path of the stop bar to separate from the stop hole, so that the limiting ring limits the stop bar, further realizing the mutual fixation of the stop bar and the welding pipe, and strengthening the limiting effect of the welding pipe on the stop bar; by rotating the limiting ring, the through hole is aligned with the stop hole, so that the stop bar can separate from the stop hole, and the welding pipe and the fixing rod can be separated from each other.

[0019] Optionally, the fixing strip is arranged on a limiting ring, and when the limiting ring blocks the stop hole, the fixing block can be located on a side of the operating ring away from the welding pipe; when the through hole is aligned with the stop hole, the fixing strip cannot be inserted into the operating hole.

[0020] By adopting the above technical scheme, when the operating ring is installed on the limit ring, the fixing strip can be inserted into the operating hole, so that the fixing block is located on the side of the operating ring away from the welding pipe, and the fixing block and the operating ring can be fixed to each other. At this time, the limit ring and the operating ring can be fixed to each other, so that the limit ring blocks the stop hole, and the limit ring limits the stop strip; if the fixing strip cannot be inserted into the operating hole, the operating ring and the limit ring may not be fixed to each other at this time, and the staff can check whether the through hole is aligned with the stop hole, so that the staff can check the limit ring to avoid the staff forgetting to rotate the limit ring, resulting in the limit ring failing to block the stop hole, thereby reducing the situation where the limit ring fails to block the stop hole.

[0021] Optionally, a fixing spring is provided on the limiting ring, and the fixing strip is provided on the fixing spring. When the fixing block abuts against the operating ring, the fixing spring is in a compressed state.

[0022] By adopting the above technical solution, a fixing spring is set on the limiting ring, so that the fixing spring drives the fixing block to abut the operating ring, and the fixing spring drives the fixing block to move toward the limiting ring, so that the fixing block can pass through the fixing hole by itself, and the staff does not need to move the fixing block manually.

[0023] Optionally, a slot for inserting a fixing block is provided on the operating ring, and when the fixing block is located in the slot, the inflation pipe and the welding pipe are fixed to each other.

[0024] By adopting the above technical solution, the fixed block is located in the slot, and the slot wall of the slot limits the fixed block, so that the fixed block and the operating ring are fixed to each other, further reducing the possibility of movement of the fixed block on the operating ring, so that the inflation pipe and the welding pipe can be more stable.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The welding tube is set on the fixed rod. When the drill piece and the drill bit are against the fixed rod, the drill piece can be located in the welding tube. In addition, the welding tube is connected to the inflation pipe. The inflation pipe releases gas, so that nitrogen can be filled in the welding tube, so that the drill piece can be filled with nitrogen during welding, so that the drill piece can be welded more stably, and the oxidation of the drill piece or the drill bit during welding is reduced, so that the drill piece and the drill bit can be used normally.

[0027] 2. Pass the locking ring through the mounting hole to limit the stop strip, so that the locking ring and the stop strip can be fixed to each other, reducing the possibility of the locking ring detaching from the stop strip, so that the welding pipe and the inflation pipe can be more stably fixed to each other; at the same time, when the perforation is aligned with the mounting hole, the stop strip can detach from the stop hole, so that the welding pipe and the inflation pipe can be separated. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of Example 1;

[0029] Figure 2 is an exploded schematic diagram highlighting the inflatable structure in Example 1;

[0030] Figure 3 is a schematic structural diagram of Example 2;

[0031] Figure 4 is a structural schematic diagram highlighting the limit ring in Example 2;

[0032] Figure 5 is an exploded schematic diagram highlighting the accommodation spring in Embodiment 2;

[0033] Figure 6 is along Figure 3Partial cross-sectional view along line AA;

[0034] Figure 7 It is an exploded schematic diagram highlighting the locking ring in Example 2.

[0035] Figure numerals: 1, shell; 11, support seat; 111, support groove; 2, moving structure; 21, loading assembly; 211, loading mechanical claw; 212, moving cylinder; 213, rotating member; 22, unloading assembly; 221, horizontal cylinder; 222, longitudinal cylinder; 223, unloading mechanical claw; 3, welding structure; 31, heating tube; 32, fixing rod; 33, heating element; 34, stop bar; 341, mounting hole; 4, inflatable structure Structure; 41, inflation pipe; 42, solenoid valve; 43, welding pipe; 431, stop hole; 432, groove; 5, limit ring; 51, through hole; 52, accommodating spring; 521, accommodating block; 53, accommodating groove; 531, fixing spring; 532, fixing strip; 533, fixing block; 6, operating ring; 61, operating hole; 62, fixing hole; 63, slot; 64, locking block; 7, locking ring; 71, perforation; 72, locking groove. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-7 This application is described in further detail.

[0037] Example 1

[0038] This embodiment discloses a drill blade welding device. Figure 1 A drill bit welding device comprises a housing 1, on which a moving structure 2, a welding structure 3 and an inflatable structure 4 are arranged. The moving structure 2 is used to realize the loading and unloading of the drill bit, the welding structure 3 is used to weld the drill bit and the drill bit, and the inflatable structure 4 is used to fill nitrogen for the welding of the drill bit and the drill bit.

[0039] Reference Figure 1 The mobile structure 2 includes a loading assembly 21 and a unloading assembly 22. The loading assembly 21 includes a loading mechanical claw 211, a moving cylinder 212 and a rotating member 213, and the loading mechanical claw 211 can grab a drill bit. The moving cylinder 212 is fixedly connected to the housing 1, the rotating member 213 is fixedly connected to the driving shaft of the moving cylinder 212, and the loading mechanical claw 211 is fixedly connected to the rotating member 213. The rotating member 213 can drive the loading mechanical claw 211 to rotate in the horizontal direction, so that the loading mechanical claw 211 can clamp a new drill bit.

[0040] Reference Figure 1The material removal component 22 includes a transverse cylinder 221, a longitudinal cylinder 222 and a material removal mechanical claw 223. The transverse cylinder 221 is fixedly connected to the shell 1, the longitudinal cylinder 222 is fixedly connected to the driving shaft of the transverse cylinder 221, and the material removal mechanical claw 223 is fixedly connected to the longitudinal cylinder 222. The material removal mechanical claw 223 can grab the drill bit.

[0041] Reference Figure 1 A support base 11 is fixedly connected to the housing 1, and a support groove 111 is opened on the surface of the support base 11, and the support groove 111 is for placing the drill bit.

[0042] Reference Figure 1 The rotating part 213 drives the loading mechanical claw 211 to rotate, allowing the loading mechanical claw 211 to grab the drill bit, and then the rotating part 213 is reset. At this time, the moving cylinder 212 drives the loading mechanical claw 211 to move the drill bit to the welding structure 3. After the welding is completed, the moving cylinder 212 drives the loading mechanical claw 211 to move from the welding structure 3 to the support seat 11, and the longitudinal cylinder 222 drives the unloading mechanical claw 223 to approach the drill bit, allowing the unloading mechanical claw 223 to grab the drill bit, the longitudinal cylinder 222 is reset, and the transverse cylinder 221 drives the unloading mechanical claw 223 to move, so as to realize the unloading of the drill bit.

[0043] Reference Figure 1 and Figure 2 The welding structure 3 includes a heating tube 31, a fixing rod 32 and a heating element 33. The heating tube 31 is fixedly connected to the heating element 33. The heating element 33 can heat the heating tube 31. The fixing rod 32 is fixedly connected to the housing 1. When the drill bit is placed in the support groove 111, the drill piece can abut against the fixing rod 32, so that the drill bit and the drill piece can be fixed to each other.

[0044] Reference Figure 2 The inflatable structure 4 includes an inflatable pipe 41, an electromagnetic valve 42 and a welding pipe 43. The electromagnetic valve 42 is fixedly connected to the inflatable pipe 41. The electromagnetic valve 42 can control the gas flow rate in the inflatable pipe 41, and the inflatable pipe 41 can be filled with nitrogen. The welding pipe 43 is detachably connected to the inflatable pipe 41, the fixing rod 32 is fixedly connected to the welding pipe 43, and the drill bit extends into the welding pipe 43. The heating pipe 31 is sleeved outside the welding pipe 43, and the heating pipe 31 can perform welding processing on the drill bit in the welding pipe 43.

[0045] The implementation principle of Example 1 is as follows: when the drill bit is welding, the gas charging pipe 41 fills the welding pipe 43 with nitrogen, so that the drill bit can weld stably.

[0046] Example 2

[0047] Reference Figure 3 and Figure 4The difference between this embodiment and the first embodiment is that a stopper strip 34 is integrally formed on the fixing rod 32, and a stopper hole 431 is fixedly connected on the outer surface of the welding tube 43, the stopper hole 431 penetrates to the end surface of the welding tube 43, and the stopper strip 34 is inserted into the stopper hole 431. When the stopper strip 34 is inserted into the stopper hole 431, the stopper strip 34 and the welding tube 43 are fixed to each other, and the fixing rod 32 is located inside the welding tube 43.

[0048] Reference Figure 4 The end surface of the welding tube 43 is rotatably connected to the limiting ring 5, and a through hole 51 is provided on the surface of the limiting ring 5 for the stopper strip 34 to pass through. When the limiting ring 5 blocks the opening in the penetration direction of the stopper hole 431, the limiting ring 5 is located on the escape path of the stopper strip 34, and the limiting ring 5 restricts the stopper strip 34 from escaping from the welding tube 43. When the limiting ring 5 does not block the opening in the penetration direction of the stopper hole 431, that is, the through hole 51 is aligned with the stopper hole 431, the limiting ring 5 releases the restriction on the stopper strip 34, and the stopper strip 34 can escape from the stopper hole 431.

[0049] Reference Figure 5 , a receiving groove is provided on the surface of the limiting ring 5, and a receiving spring 52 is fixedly connected in the receiving groove. A receiving block 521 is fixedly connected on the surface of the receiving spring 52 away from the bottom wall of the receiving groove, and the surface of the receiving block 521 away from the receiving spring 52 is an arc surface. A groove 432 for inserting the receiving block 521 is provided on the end surface of the welding tube 43, and the receiving spring 52 drives the receiving block 521 to be inserted into the groove 432. When the receiving block 521 is located in the groove 432, the receiving spring 52 is in a non-stressed state; when the receiving block 521 abuts against the end surface of the welding tube 43, the receiving spring 52 is in a compressed state.

[0050] Reference Figure 6 A receiving groove 53 is provided on the surface of the limiting ring 5, and a fixing spring 531 is fixedly connected in the receiving groove 53. One end of the fixing spring 531 is fixedly connected to the bottom wall of the receiving groove 53, and the other end of the fixing spring 531 is fixedly connected to a fixing bar 532, and the fixing spring 531 drives the fixing bar 532 to move toward the bottom wall of the receiving groove 53. The fixing bar 532 extends along the length direction of the welding pipe 43, and two fixing blocks 533 are fixedly connected on the surface of the fixing bar 532.

[0051] Reference Figure 6 An operating ring 6 is rotatably connected to the outer surface of the inflation pipe 41, and an operating hole 61 is provided on the surface of the operating ring 6, and the operating hole 61 allows the fixing bar 532 to pass through. A fixing hole 62 connected to the operating hole 61 is provided on the surface of the operating ring 6, and the fixing block 533 passes through the fixing hole 62. A card slot 63 for the fixing block 533 to be inserted is provided on the surface of the operating ring 6, and the card slot 63 is connected to the operating hole 61.

[0052] Reference Figure 5 and Figure 6 When the fixing block 533 is located in the slot 63, the fixing strip 532 is located at the operating hole 61, and the fixing spring 531 is in a stretched state, at which time the operating ring 6 is locked, and the receiving block 521 is located in the groove 432. The staff can pull the fixing block 533 to disengage the fixing slot 63, and then the staff rotates the operating ring 6 to make the fixing hole 62 located on the moving path of the fixing block 533. The fixing spring 531 drives the fixing strip 532 to drive the fixing block 533 to move in the direction of disengaging the limiting ring 5, thereby unlocking the operating ring 6.

[0053] Reference Figure 6 and Figure 7 A locking ring 7 is rotatably connected to the inner wall of the welding tube 43, and the locking ring 7 can be inserted into the stop hole 431. A through hole 71 is provided on the surface of the locking ring 7 for the stop strip 34 to pass through. A mounting hole 341 is provided on the surface of the stop strip 34 for the locking ring 7 to be inserted.

[0054] Reference Figure 7 When the locking ring 7 is inserted into the mounting hole 341, the locking ring 7 restricts the stop strip 34 from being separated from the stop hole 431, and the locking ring 7 and the stop strip 34 can be fixed to each other. When the stop hole 431 is connected to the through hole 71, the locking ring 7 does not abut the stop strip 34, and the stop strip 34 can be separated from the stop hole 431.

[0055] Reference Figure 6 and Figure 7 The inner diameter of the locking ring 7 is smaller than the inner diameter of the welding tube 43. A locking groove 72 is provided on the end surface of the locking ring 7, and the locking groove 72 is located in the welding tube 43. A locking block 64 is fixedly connected to the end surface of the operating ring 6, and the locking block 64 can be inserted into the locking groove 72. When the locking block 64 is inserted into the locking groove 72, the operating ring 6 and the locking ring 7 rotate synchronously.

[0056] Reference Figure 6 and Figure 7 The locking block 64 is inserted into the locking groove 72. The operating ring 6 can drive the locking ring 7 to rotate through the locking block 64, so that the locking ring 7 is inserted into the mounting hole 341, and the locking ring 7 locks the stop strip 34. The locking block 64 is inserted into the locking groove 72. When the operating ring 6 rotates, the fixing block 533 can pass through the fixing hole 62. At this time, the locking ring 7 is separated from the mounting hole 341, and the locking ring 7 releases the lock on the stop strip 34.

[0057] Reference Figure 4 and Figure 7 When the locking ring 7 and the limiting ring 5 both limit the stop strip 34 , the through hole 51 is not aligned with the through hole 71 , that is, an outsider cannot simultaneously rotate the locking ring 7 and the limiting ring 5 to unlock the stop strip 34 .

[0058] The implementation principle of Example 2 is as follows: when the inflation pipe 41 is installed on the welding pipe 43, the staff first pulls the fixing block 533 to disengage the fixing block 533 from the slot 63, and then slides the operating ring 6 to allow the fixing hole 62 to be located on the moving path of the fixing block 533, and the fixing spring 531 drives the fixing strip 532 to move to the operating hole 61 and the fixing block 533 to move to the fixing hole 62, thereby unlocking the operating ring 6 and the limiting ring 5. At this time, the operating ring 6 drives the locking ring 7 to rotate through the locking block 64, and disengages the locking ring 7 from the mounting hole 341, thereby releasing the locking of the stop strip 34 by the locking ring 7, and the staff can remove the inflation pipe 41 from the welding pipe 43, and then the staff rotates the limiting ring 5 to align the through hole 51 with the stop hole 431, so that the limiting ring 5 releases the lock on the stop strip 34, and the stop strip 34 can be detached from the stop hole 431, thereby realizing the disassembly of the welding pipe 43.

[0059] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0060] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.

Claims

1. A drill bit welding device, comprising a housing (1), wherein the housing (1) is provided with a moving structure (2), a welding structure (3) and an inflatable structure (4), wherein the moving structure (2) is used to move a drill bit, and the welding structure (3) comprises a fixing rod (32) and a heating tube (31), wherein the fixing rod (32) is arranged on the housing (1), and wherein: The inflatable structure (4) comprises an inflatable pipe (41) and a welding pipe (43), wherein the welding pipe (43) is connected to the inflatable pipe (41), the welding pipe (43) is arranged on the fixing rod (32), the heating pipe (31) is sleeved outside the welding pipe (43), the welding pipe (43) is for inserting a drill bit, and the inflatable pipe (41) is used to release gas; The welding pipe (43) is provided with a fixing strip (532), the fixing strip (532) is provided with a fixing block (533), the inflation pipe (41) is rotatably connected with an operating ring (6), the operating ring (6) is provided with an operating hole (61) for the fixing strip (532) to pass through, the operating ring (6) is provided with a fixing hole (62) for the fixing block (533) to pass through, and the fixing hole (62) is connected to the operating hole (61); when the fixing block (533) abuts against the operating ring (6), the welding pipe (43) and the inflation pipe (41) are fixed to each other; The fixing rod (32) is provided with a stopper strip (34), and the welding tube (43) is provided with a stopper hole (431) for the stopper strip (34) to pass through, and the stopper hole (431) penetrates to the side of the welding tube (43); when the stopper strip (34) is located in the stopper hole (431), the welding tube (43) is fixed to the fixing rod (32); A locking ring (7) is rotatably connected to the welding pipe (43); a through hole (71) is provided on the locking ring (7) for the stop strip (34) to pass through; and a mounting hole (341) is provided on the stop strip (34) for the locking ring (7) to be inserted into; when the locking ring (7) is located in the mounting hole (341), the locking ring (7) restricts the stop strip (34) from escaping from the stop hole (431); when the through hole (71) is aligned with the mounting hole (341), the stop strip (34) can escaping from the stop hole (431); A limiting ring (5) is rotatably connected to the welding pipe (43); a through hole (51) is provided on the limiting ring (5) for the stop strip (34) to pass through; the limiting ring (5) is located on a moving path for the stop strip (34) to separate from the stop hole (431); when the limiting ring (5) blocks the stop hole (431), the stop strip (34) is fixed in the stop hole (431); when the through hole (51) is aligned with the stop hole (431), the stop strip (34) can separate from the stop hole (431).

2. The drill bit welding device according to claim 1, characterized in that: The locking ring (7) is provided with a locking groove (72), and the operating ring (6) is provided with a locking block (64) for inserting into the locking groove (72); when the inflation pipe (41) is installed on the welding pipe (43), the locking block (64) is located in the locking groove (72); when the fixing hole (62) is located on the detachment path of the fixing block (533), the mounting hole (341) is aligned with the through hole (71); when the fixing hole (62) is not located on the detachment path of the fixing block (533), the locking ring (7) is located in the mounting hole (341).

3. The drill blade welding device according to claim 1, characterized in that: The fixing strip (532) is arranged on the limiting ring (5); when the limiting ring (5) blocks the stop hole (431), the fixing block (533) can be located on a side of the operating ring (6) away from the welding pipe (43); when the through hole (51) is aligned with the stop hole (431), the fixing strip (532) cannot be inserted into the operating hole (61).

4. The drill blade welding device according to claim 3, characterized in that: The limiting ring (5) is provided with a fixing spring (531), and the fixing strip (532) is arranged on the fixing spring (531). When the fixing block (533) abuts against the operating ring (6), the fixing spring (531) is in a compressed state.

5. The drill blade welding device according to claim 4, characterized in that: The operating ring (6) is provided with a slot (63) for inserting the fixing block (533). When the fixing block (533) is located in the slot (63), the inflation pipe (41) and the welding pipe (43) are fixed to each other.

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