Safe welding tool for welded pipe and welded plate

Abstract

The invention relates to the technical field of pipeline welding, in particular to a safe welding tool for a welded pipe and a welded plate, which comprises a workbench, a welding head and a rotating shaft are arranged on the workbench, and a limiting hole is formed in the rotating shaft; the clamping and positioning assembly comprises a three-jaw chuck rotationally installed on the workbench, multiple sets of first racks and multiple sets of second racks, the first racks are arranged on the three-jaw chuck, when the three-jaw chuck is driven, the first racks move towards the center of the three-jaw chuck or move away from the center of the three-jaw chuck, and the second racks are arranged on the three-jaw chuck in a sliding mode; a first limiting plate is arranged on the side, away from the rotating shaft, of the first rack, an anti-skid block and a third limiting plate which are matched with each other are arranged on the first limiting plate, and when the anti-skid block is pressed, the anti-skid block slides towards the interior of the first limiting plate and abuts against the side face of the flange, and meanwhile the anti-skid block drives the third limiting plate to descend to abut against the top end of the flange. The stability between the welded pipe and the flange is improved, and the welding precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline welding, and specifically relates to a safety welding tooling for welded pipes and welded plates. Background Art

[0002] Socket-welding flanges refer to flanges where the end of the pipe is inserted into the stepped part of the flange ring and welded on the pipe end and the outside. There are two types: with and without a neck. The pipe flange with a neck has good rigidity, small welding deformation, and good sealing performance, and can be used in occasions with a pressure of 1.0 - 10.0 MPa.

[0003] The Chinese Patent Network discloses a pipeline flange welding device with the publication number: CN117182250B and the name of "A Pipeline Flange Welding Device". Two sets of electric push rods arranged on the support frame are used to push the annular plate one to fix the welded pipe, and then the electric pull rod on the support frame is used to drive the annular plate two to fix the flange.

[0004] In the above technical solution, multiple sets of driving devices are used to drive the annular plates to fix the welded pipe and the flange in sections, which easily causes an axial deviation of the diameters of the welded pipe and the flange. On the other hand, the fixing method for the flange of the welded pipe is single, and the welded pipe and the flange cannot be fixed in the vertical direction, resulting in insufficient connection when the welded pipe and the flange are welded. Summary of the Invention

[0005] Aiming at the above-mentioned shortcomings of the prior art, the present invention provides a safety welding tooling for welded pipes and welded plates, which can effectively solve the problems of single fixing method, insufficient fixing, and poor clamping stability of welded pipes and flanges in the prior art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: The present invention provides a safety welding tooling for welded pipes and welded plates, including: A workbench, on which a welding head and a rotating shaft are provided, and a plurality of sets of limiting holes distributed in a circular array are provided on the rotating shaft; A clamping and positioning assembly, the clamping and positioning assembly includes a three-jaw chuck rotatably installed on the workbench and a plurality of sets of rack one and a plurality of sets of rack two. The rack one is arranged on the three-jaw chuck and can move radially. When the three-jaw chuck is driven, the plurality of sets of rack one move towards the center of the three-jaw chuck or move away from the center. The rack two is slidably arranged on the three-jaw chuck, and the rack one and the rack two are meshed with each other through a gear. A limiting plate one is provided on the side of the rack one away from the rotating shaft, and a non-slip block and a limiting plate three that cooperate with each other are provided on the limiting plate one. When the non-slip block is pressed, it slides into the limiting plate one and abuts against the side surface of the flange, and at the same time, the non-slip block drives the limiting plate three to descend to abut against the top of the flange.

[0007] Furthermore, the three-jaw chuck is provided with a support plate for fixing the gear, and the support plate is provided with a slide groove, and rack 2 is slidably set on the support plate and meshingly connected with the gear. When rack 1 moves radially on the three-jaw chuck, rack 2 is driven to move radially on the three-jaw chuck through the gear cooperation, and the moving direction of rack 2 is opposite to that of rack 1.

[0008] Furthermore, a limiting plate 2 is provided at one end of the second rack close to the rotating shaft, and the limiting plate 2 is elastically connected to the second rack.

[0009] Furthermore, the limit plate three vertically slides on the limit plate one through the vertical plate, and a guide groove is provided on the vertical plate, the anti-sliding block is slidably arranged on the limit plate one, and the sliding direction of the anti-sliding block is perpendicular to the sliding direction of the vertical plate.

[0010] Furthermore, an elastic member is provided between the anti-sliding block and the limiting plate one, and the elastic member always pushes the anti-sliding block to extend out of the limiting plate one.

[0011] Furthermore, a guide plate 1 in the shape of a right-angled trapezoid is provided on the side of the anti-sliding plate facing the vertical plate, and the guide plate 1 is cooperatively connected with the vertical plate and extends into the guide groove, that is, the anti-sliding plate retracts into the limit plate 1 after being contacted and squeezed by the outer wall of the flange, and then drives the guide plate 1 to squeeze the vertical plate to drive the limit plate 3 to move toward the workbench to support the top of the flange, so that the welded pipe and the flange can fit more fully.

[0012] Furthermore, a triangular guide plate 2 is provided at one right-angled end of the guide plate, and the acute-angled end of the guide plate 2 faces the vertical plate. That is, after the limit plate 1 is away from the flange, the anti-sliding plate extends out of the limit plate 1 to drive the guide plate 2 to drive the limit plate 3 to rise, thereby eliminating the extrusion on the top of the flange.

[0013] Furthermore, a telescopic plate is elastically mounted on one end of the rack facing the rotating shaft, and a latch is provided on one end of the telescopic plate facing the rotating shaft, and the latch is cooperatively connected with the limiting hole.

[0014] Furthermore, the welding heads are provided in two groups and are symmetrically distributed on the workbench. Beneficial Effects

[0015] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: 1. By adjusting the three-jaw chuck to drive rack 1 to move toward the center of the three-jaw chuck, the gear drives rack 2 to move away from the center of the three-jaw chuck. The limit plate 1 on rack 1 and the limit plate 2 on rack 2 cooperate to simultaneously press against the inner wall of the welded pipe and the outer side of the flange, effectively preventing the axial deviation of the welded pipe and the flange, and improving the accuracy of clamping and fixing; Second, through the cooperation of the anti-sliding block, the first guiding plate, the second guiding plate and the vertical plate provided on the first limiting plate, when the anti-sliding block retracts into the first limiting plate, it drives the first guiding plate to squeeze the vertical plate, thereby driving the third limiting plate to descend to abut against the upper end of the flange, making the flange and the welded pipe more tightly fastened, reducing the gap therebetween, and increasing the stability between the welded pipe and the flange. Third, through the cooperation of the telescopic plate provided on the side of the first rack close to the rotating shaft and the engaging teeth, while the workpiece is clamped and fixed, it abuts against the rotating shaft. When the rotating shaft rotates, it can drive the first rack, the three-jaw chuck and the workpiece to rotate on the workbench, realizing automatic rotational welding. Cooperating with the welding heads symmetrically arranged on the workbench, it maintains a uniform speed during welding, prevents problems such as incomplete local welding and over-welding, and reduces welding stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the connection between the clamping and positioning assembly of the present invention and the workbench; Figure 3 It is a partial cross-sectional view of the present invention; Figure 4 For the present invention Figure 3 The enlarged view of part A in; Figure 5 For the present invention Figure 3 The enlarged view of part B in; Figure 6 It is an exploded view of the structure of the first limiting plate of the present invention.

[0018] Reference numerals: 1, workbench; 11, welding head; 12, rotating shaft; 121, limiting hole; 2, clamping and positioning assembly; 21, three-jaw chuck; 22, first rack; 221, first limiting plate; 2211, anti-sliding block; 2212, first guiding plate; 2213, second guiding plate; 2214, vertical plate; 2215, third limiting plate; 222, telescopic plate; 2221, engaging teeth; 23, second rack; 231, second limiting plate; 24, gear; 25, support plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] The present invention will be further described below with reference to the embodiments. Embodiment

[0021] A safety welding tooling for welded pipes and welded plates, referring to the attached Figures 1-6 , includes: A workbench 1, on which a welding head 11 and a rotating shaft 12 are provided. There are two groups of welding heads 11 which are symmetrically distributed on the workbench 1. The two groups of welding heads 11 located on the opposite sides simultaneously weld the welded pipe and the flange, which can effectively reduce the stress during welding and improve the welding precision. The rotating shaft 12 is provided with multiple groups of limiting holes 121 distributed in a circular array. The rotating shaft 12 can drive the workpiece to be welded after clamping, keep the speed uniform during welding, and improve the stability during welding. The multiple groups of limiting holes 121 on the rotating shaft 12 are used to cooperate with the clamping and positioning assembly 2 to achieve the connection after clamping and fixing, and at the same time the detachment after releasing the clamping. The clamping and positioning assembly 2 includes a three-jaw chuck 21 and multiple groups of racks 1 22 and multiple groups of racks 23 rotatably mounted on the workbench 1. The three-jaw chuck 21 is a prior art and will not be described in detail. The jaws are driven to approach and move away from each other by rotating the jaw adjustment mechanism on the three-jaw chuck 21. The racks 1 22 are arranged on the three-jaw chuck 21 and can move radially. The multiple groups of racks 1 22 are moved away from and approached from each other by the jaw driving mechanism on the three-jaw chuck 21. In addition, the racks 23 are slidably arranged on the three-jaw chuck 21, and the racks 1 22 and the racks 23 are meshed and connected by a gear 24. The three-jaw chuck 21 is provided with two groups of support plates 25 for fixing the gears 24. The two groups of support plates 25 are respectively located on both sides of the racks 1 22, and the support plates 25 are provided with sliding grooves. The racks 23 are slidably arranged on the support plates 25 and meshed and connected with the gears 24. When the racks 1 22 move radially on the three-jaw chuck 21 When the three-jaw chuck 21 is driven, the gear 24 cooperates to drive the rack 23 to move radially on the three-jaw chuck 21, and the moving direction of the rack 23 is opposite to the moving direction of the rack 1 22, that is, when the three-jaw chuck 21 is driven, when the multiple sets of rack 1 22 move toward the center of the three-jaw chuck 21, the rack 23 moves away from the center of the three-jaw chuck 21, and when the rack 1 22 moves away from the center of the three-jaw chuck 21, the rack 23 moves toward the center of the three-jaw chuck 21. A limiting plate 1 221 is provided on the side of the rack 1 22 away from the rotating shaft 12, and a limiting plate 231 is provided on the end of the rack 2 23 close to the rotating shaft 12, and the limiting plate 231 is elastically connected to the rack 2 23, when the three-jaw chuck 21 drives the rack 1 22 to move toward the center of the three-jaw chuck 21 to cooperate with the limiting plate 1 221 to press against the outer side of the flange, and at the same time, the rack 2 23 moves away from the center of the three-jaw chuck 21 to cooperate with the limiting plate 231 to press against the inner wall of the welded pipe, so as to realize synchronous clamping.

[0022] In the above technical scheme, the three-jaw chuck 21 is adjusted to drive multiple groups of racks 22 to move toward the center of the three-jaw chuck 21, and the flange is clamped by the limit plate 221 that cooperates with the rack 22 away from the center end of the three-jaw chuck 21. With the cooperation of the gear 24, the rack 23 is driven to move away from the center of the three-jaw chuck 21. The limit plates 231 that are arranged on the rack 23 and close to the center of the three-jaw chuck 21 are away from each other and against the inner wall of the weld pipe, so as to realize the simultaneous fixation of the weld pipe and the flange, effectively prevent the deviation of the weld pipe and the flange, and improve the welding accuracy. At the same time, the welding head 11 symmetrically arranged on the workbench 1 can reduce the welding stress during welding, and improve the welding strength and accuracy.

[0023] The first limiting plate 221 is provided with a non-slip block 2211 and a third limiting plate 2215 that cooperate with each other. The third limiting plate 2215 is used to squeeze the flange so that it is fully pressed against the welded pipe. When the non-slip block 2211 is squeezed by the side of the flange, the non-slip block 2211 slides into the first limiting plate 221 and retracts. At the same time, the non-slip block 2211 drives the third limiting plate 2215 to descend to abut against the top of the flange.

[0024] Specifically, the third limiting plate 2215 vertically slides on the first limiting plate 221 through a vertical plate 2214. A guide groove is provided on the vertical plate 2214, and the cross-section of the guide groove is a parallelogram. The non-slip block 2211 is slidably arranged on the first limiting plate 221, and the sliding direction of the non-slip block 2211 is perpendicular to the sliding direction of the vertical plate 2214. After being pressed, the non-slip block 2211 will drive the third limiting plate 2215 to descend, and at the same time, squeeze the side and end faces of the flange. A first guide plate 2212 in the shape of a right trapezoid is provided on one side of the non-slip block 2211 facing the vertical plate 2214. The first guide plate 2212 is cooperatively connected with the vertical plate 2214 and extends into the guide groove. That is, after the non-slip block 2211 contacts and squeezes the outer wall of the flange, it retracts into the first limiting plate 221, and then drives the first guide plate 2212 to squeeze the vertical plate 2214 to drive the third limiting plate 2215 to move towards the workbench 1 to abut against the top of the flange, which can make the welded pipe and the flange fit more fully.

[0025] Furthermore, a second guide plate 2213 in the shape of a triangle is provided at the right-angled end of the first guide plate 2212, and the acute-angled end of the second guide plate 2213 faces the vertical plate 2214. That is, after the first limiting plate 221 moves away from the flange, when the non-slip block 2211 extends out of the first limiting plate 221, it drives the second guide plate 2213 to drive the third limiting plate 2215 to rise, canceling the extrusion of the top of the flange. An elastic member is provided between the non-slip block 2211 and the first limiting plate 221, and the elastic member always pushes the non-slip block 2211 to extend out of the first limiting plate 221. After welding is completed, when adjusting the three-jaw chuck 21 to drive the first rack 22 to loosen the flange, the elastic member in the first limiting plate 221 will push the non-slip block 2211 out immediately. At the same time, cooperating with the second guide plate 2213 and the vertical plate 2214 to raise the third limiting plate 2215 and separate it from the end of the flange, thereby canceling the clamping.

[0026] In the above technical scheme, when the three-jaw chuck 21 drives the rack 1 22 and cooperates with the gear 24 to drive the rack 2 23 to fix the welding pipe and the flange at the same time, the anti-sliding plate 2211, the guide plate 1 2212, the guide plate 2213 and the vertical plate 2214 arranged on the limit plate 1 221 on the central side of the three-jaw chuck 21 away from the rack 1 22 cooperate with each other. When the anti-sliding plate 2211 retracts into the limit plate 1 221, it drives the guide plate 1 2212 to squeeze the vertical plate 2214, thereby driving the limit plate 3 2215 to descend to resist the upper end portion of the flange, so that the flange and the welding pipe are more tightened, the gap between them is reduced, and the stability between the welding pipe and the flange is increased. When the welding is completed, the anti-sliding plate 2211 is pushed out of the limit plate 1 221 by the elastic member. At the same time, the anti-sliding plate 2211 drives the guide plate 2 2213 to reset and toggle the vertical plate 2214 to rise, thereby moving the limit plate 3 2215 away from the upper end surface of the flange, thereby improving the stability of the workpiece during welding.

[0027] It is worth mentioning that a telescopic plate 222 is elastically installed at one end of the rack 22 facing the rotating shaft 12, and a latch tooth 2221 is provided at one end of the telescopic plate 222 facing the rotating shaft 12, and the latch tooth 2221 is matched with the limiting hole 121. When the rack 22 moves toward the center of the three-jaw chuck 21, the telescopic plate 222 is driven to move toward the rotating shaft 12 and the latch tooth 2221 is pressed against the rotating shaft 12. As the rotating shaft 12 rotates, the latch tooth 2221 will slide into the limiting hole 121, and then drive the rack 22, the three-jaw chuck 21 and the workpiece to rotate on the workbench 1, thereby realizing automatic rotation welding, cooperating with the welding head 11 to maintain a uniform speed during welding, and preventing problems such as inadequate local welding and excessive welding.

[0028] Working principle: Place the welded pipe on the clamping and positioning assembly 2 and insert the second limiting plate 231 into the inside of the welded pipe. Then, slip the flange over the welded pipe. After that, drive multiple first racks 22 to move towards the center of the three-jaw chuck 21 by adjusting the three-jaw chuck 21. Cooperate with the first limiting plate 221 at the end of the first rack 22 away from the center of the three-jaw chuck 21 to clamp the flange. At this time, with the cooperation of the gear 24, drive the second rack 23 to move away from the center of the three-jaw chuck 21. The second limiting plates 231 arranged on the second rack 23 and close to the center of the three-jaw chuck 21 move away from each other and abut against the inner wall of the welded pipe, realizing the simultaneous fixation of the welded pipe and the flange. At the same time, through the cooperation of the anti-slip block 2211, the first guide plate 2212, the second guide plate 2213 and the vertical plate 2214 arranged on the first limiting plate 221 on the side of the first rack 22 away from the center of the three-jaw chuck 21, when the anti-slip block 2211 is compressed and retracted by the extrusion on the outer side of the flange, drive the first guide plate 2212 to squeeze the vertical plate 2214, thereby driving the third limiting plate 2215 to descend to abut against the upper end of the flange, making the flange and the welded pipe more tightly fastened and reducing the gap between them; after the workpiece is clamped and fixed, since the telescopic plate 222 is elastically installed at one end of the first rack 22 facing the rotating shaft 12, and the telescopic plate 222 is provided with a tooth 2221 at one end facing the rotating shaft 12. After the workpiece is clamped, the telescopic plate 222 moves with the first rack 22 and moves towards the rotating shaft 12. At the same time, the tooth 2221 abuts against the rotating shaft 12. When the rotating shaft 12 rotates, the tooth 2221 will slide into the limiting hole 121 to complete the mutual limitation. Subsequently, when the rotating shaft 12 rotates, it can drive the first rack 22, the three-jaw chuck 21 and the workpiece to rotate on the workbench 1, realizing automatic rotation welding. Cooperate with the welding head 11 to maintain a uniform speed during welding, preventing problems such as incomplete local welding and excessive welding. On the other hand, the symmetrically arranged welding heads 11 on the workbench 1 can reduce the welding stress during welding, improving the welding strength and accuracy.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention 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 on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A safety welding tooling for welded pipes and welded plates, characterized in that, Including: A workbench (1), on which a welding head (11) and a rotating shaft (12) are provided, and a plurality of groups of limiting holes (121) distributed in an annular array are provided on the rotating shaft (12); A clamping and positioning assembly (2), which includes a three-jaw chuck (21) rotatably installed on the workbench (1), a plurality of groups of first racks (22) and a plurality of groups of second racks (23). The first racks (22) are arranged on the three-jaw chuck (21) and can move radially. When the three-jaw chuck (21) is driven, the plurality of groups of first racks (22) move towards the center of the three-jaw chuck (21) or move away from the center. The second racks (23) are slidably arranged on the three-jaw chuck (21), and the first racks (22) and the second racks (23) are meshed and connected through gears (24). A first limiting plate (221) is provided on the side of the first rack (22) away from the rotating shaft (12), and an anti-sliding block (2211) and a third limiting plate (2215) which cooperate with each other are provided on the first limiting plate (221). When the anti-sliding block (2211) is pressed, it slides into the first limiting plate (221) and abuts against the side surface of the flange. At the same time, the anti-sliding block (2211) drives the third limiting plate (2215) to descend to abut against the top of the flange.

2. The safety welding tooling for a welded pipe and a welded plate according to claim 1, characterized in that, A support plate (25) for fixing the gear (24) is provided on the three-jaw chuck (21), and a chute is provided on the support plate (25). The second rack (23) is slidably arranged on the support plate (25) and is meshed and connected with the gear (24). When the first rack (22) moves radially on the three-jaw chuck (21), the second rack (23) is driven to move radially on the three-jaw chuck (21) through the cooperation of the gear (24), and the moving direction of the second rack (23) is opposite to the moving direction of the first rack (22).

3. The safety welding tooling for a welded pipe and a welded plate according to claim 1, characterized in that, A second limiting plate (231) is provided at one end of the second rack (23) close to the rotating shaft (12), and the second limiting plate (231) is elastically connected to the second rack (23).

4. The safety welding tooling for a welded pipe and a welded plate according to claim 1, characterized in that, The third limiting plate (2215) vertically slides on the first limiting plate (221) through a vertical plate (2214), and a guide groove is provided on the vertical plate (2214). The anti-sliding block (2211) is slidably arranged on the first limiting plate (221), and the sliding direction of the anti-sliding block (2211) is perpendicular to the sliding direction of the vertical plate (2214).

5. The safety welding tooling for a welded pipe and a welded plate according to claim 4, characterized in that, An elastic member is provided between the anti-sliding block (2211) and the first limiting plate (221), and the elastic member always pushes the anti-sliding block (2211) to extend out of the first limiting plate (221).

6. The safety welding tooling for a welded pipe and a welded plate according to claim 5, characterized in that, A first guide plate (2212) in the shape of a right trapezoid is provided on the side of the anti-sliding block (2211) facing the vertical plate (2214). The first guide plate (2212) is cooperatively connected with the vertical plate (2214) and extends into the guide groove. That is, after the anti-sliding block (2211) contacts and presses against the outer wall of the flange, it retracts into the first limiting plate (221), and then drives the first guide plate (2212) to press against the vertical plate (2214) to drive the third limiting plate (2215) to move towards the workbench (1) to abut against the top of the flange, so that the welded pipe and the flange can be more fully fitted.

7. The safety welding tooling for a welded pipe and a welded plate according to claim 6, characterized in that, One end of the right angle of the guide plate one (2212) is provided with a triangular guide plate two (2213), and one end of the acute angle of the guide plate two (2213) faces the vertical plate (2214), that is, after the limiting plate one (221) moves away from the flange, when the anti-sliding block (2211) extends out of the limiting plate one (221), it drives the guide plate two (2213) to drive the limiting plate three (2215) to rise, canceling the extrusion on the top of the flange.

8. The safety welding tooling for a welded pipe and a welded plate according to claim 1, characterized in that, One end of the rack one (22) facing the rotating shaft (12) is elastically installed with a telescopic plate (222), and one end of the telescopic plate (222) facing the rotating shaft (12) is provided with a locking tooth (2221), and the locking tooth (2221) is connected with the limiting hole (121) in a matching manner.

9. The safety welding tooling for a welded pipe and a welded plate according to claim 1, characterized in that, There are two groups of the welding heads (11) and they are symmetrically distributed on the workbench (1).

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