Bend fixing type chuck welding device

Abstract

The invention relates to the technical field of elbow welding devices, and provides an elbow fixing type chuck welding device which is used for welding a splicing gap of two semicircular elbows to form an elbow, two positioning lug plates are pre-welded to the same side of the elbow, and locking insertion holes are formed in the positioning lug plates in a penetrating mode. The multiple shape righting pieces are arranged on the guide column at intervals in the length direction of the guide column, the shape righting pieces are used for abutting against the inner wall of the elbow, and a guide fastener is arranged on the welding unit, is used for being buckled on the guide column and slides along the guide column; the guide column is used for stretching into the elbow and detachably connected with the rack, the guide column has the same curvature as the inner wall of the elbow, and the shape correcting piece is used for abutting against the inner wall of the elbow so that the welding unit can move along the guide column and weld a splicing gap of the elbow. According to the technical scheme, the technical problems that the advancing direction of the welding machine is not easy to master through manual operation and the welding precision is reduced in the prior art are solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of elbow welding devices, and in particular, to an elbow fixed chuck welding device. Background Art

[0002] In the modern industrial system, pipeline systems, as key carriers for the transportation of various fluids, are widely used in many fields such as petroleum, chemical industry, electric power, and construction.

[0003] In the processing of large butt-welded elbows, the commonly used process is to first make a semicircular elbow from a fan-shaped raw material plate through a stamping process, and then splice the two semicircular elbows to form a complete elbow prototype. In order to ensure the stability of the shape of the elbow during subsequent transportation and welding, several spot welding will be performed at the splicing gap to initially fix the shape of the elbow, and then it will be transported to the welding device to weld the splicing gap as a whole.

[0004] However, the existing welding operation method mainly relies on manual labor, which requires the welder to move along the joint gap to complete the welding work. When welding the gap on the inner wall of the elbow, due to space limitations, the operator sometimes needs to enter the inside of the elbow to operate. The manual operation method relies on the operator's experience, and it is difficult to accurately grasp the moving direction of the welder, which causes the moving route of the welder to easily deviate, directly affecting the welding accuracy and reducing the quality of the butt-welded elbow.

[0005] In summary, how to improve the accuracy of large butt-welded elbows during welding has become an important issue that needs to be urgently solved in the current field of butt-welded elbow processing and manufacturing. Summary of the invention

[0006] To overcome the above defects, an embodiment of the present invention provides an elbow fixed chuck welding device, which solves the technical problem in the related art that it is difficult for manual operation to grasp the moving direction of the welding machine, thereby reducing the welding accuracy.

[0007] According to one aspect, at least one embodiment of the present invention provides an elbow fixed chuck welding device, which is used to weld the joint gaps of two semicircular elbows to form an elbow, and two positioning ear plates are pre-welded on the same side of the elbow, and a locking socket is penetrated through the positioning ear plate, including a frame, a guide column, a corrective member and a welding unit, wherein the corrective member is provided in plurality and is arranged on the guide column at intervals along the length direction of the guide column, and the corrective member is used to abut against the inner wall of the elbow, and the welding unit is provided with a guide fastener, and the guide fastener is used to buckle on the guide column and slide along the guide column; The guide column is used to extend into the elbow and is detachably connected to the frame. The guide column has the same curvature as the inner wall of the elbow. The orthopedic piece is used to abut the inner wall of the elbow so that the welding unit moves along the guide column and welds the joint gap of the elbow.

[0008] For example, in a bend fixed chuck welding device provided by at least one embodiment of the present invention, it further includes: There are two sets of guiding columns, which are symmetrically located on both sides of the welding unit. Guiding fasteners are provided on both sides of the welding unit. Ball bearings are embedded on the inner wall of the guiding fasteners, and the ball bearings are used for rolling cooperation with the peripheral wall of the guiding columns.

[0009] For example, in a bend fixed chuck welding device provided by at least one embodiment of the present invention, it further includes: It further includes a swing frame swingably arranged on the frame. There are two sets of swing frames, which are symmetrically located at both ends of the guiding columns. The rotation axis of the swing frame is configured to be concentric with the bend. Fixed clamping members are provided at the lower ends of the two sets of swing frames, and the two sets of swing frames can drive the two sets of fixed clamping members to swing towards each other to clamp the two ends of the bend.

[0010] For example, in a bend fixed chuck welding device provided by at least one embodiment of the present invention, it further includes: A locking clamp is sleeved on the end of the guiding column, and the locking clamp is connected to the fixed clamping member through a connecting member.

[0011] For example, in a bend fixed chuck welding device provided by at least one embodiment of the present invention, it further includes: A plurality of radially extending mounting screw holes are provided on the guiding column. The plurality of mounting screw holes are arranged at intervals along the extending direction of the guiding column. One end of the orthopedic member is threadedly connected in the mounting screw hole, and the other end has a rubber pad for abutting against the inner wall of the bend.

[0012] For example, in a bend fixed chuck welding device provided by at least one embodiment of the present invention, it further includes: A lifting frame is slidably arranged on the frame. A fixed chuck is rotatably arranged on the lifting frame. The swing frame is swingably arranged on the fixed chuck. The fixed chuck is used to drive the swing frame to rotate to adjust the placement angle of the bend. Two positioning holes for the positioning ear plates on the outer wall of the bend to penetrate and insert are symmetrically provided on the fixed chuck. A locking wedge plate is slidably arranged on the back of the fixed chuck, and the locking wedge plate can be inserted into the locking jack to lock the bend to the fixed chuck.

[0013] For example, in a bend fixed chuck welding device provided by at least one embodiment of the present invention, it further includes: The fixed chuck is slidably provided with two positioning members spaced apart vertically. The radian of the positioning member is configured to be the same as that of the elbow. The fixed chuck can contact the circumferential wall of the elbow to form a contact line. The two positioning members are respectively located on the upper and lower sides of the contact line and can approach each other and abut between the outer wall of the elbow and the fixed chuck.

[0014] For example, in a kind of elbow fixed chuck welding device provided by at least one embodiment of the present invention, it further includes: On the back of the fixed chuck, there are two adjusting screws extending in the vertical direction. The two adjusting screws are respectively located at the two ends of the elbow one by one. The two ends of the same adjusting screw are respectively threadedly connected to the two positioning members. The adjusting screw is a bidirectional screw, and the two adjusting screws can synchronously drive the two positioning members to move towards each other to abut between the outer wall of the elbow and the fixed chuck.

[0015] For example, in a kind of elbow fixed chuck welding device provided by at least one embodiment of the present invention, it further includes: A telescopic member is arranged on the frame. A support sprocket is rotatably arranged on the upper part of the frame. A lifting chain is connected between the telescopic end of the telescopic member and the lifting frame, and the lifting chain meshes with the support sprocket.

[0016] For example, in a kind of elbow fixed chuck welding device provided by at least one embodiment of the present invention, it further includes: The outer periphery of the guide post has a rubber layer.

[0017] The beneficial effects of the embodiments of the present invention are as follows: In the present invention, after splicing and spot welding two semi-circular elbows for preliminary fixing, the elbow is placed on the frame. The guide post is placed inside the elbow, and multiple orthopedic members are in full contact with the inner wall of the elbow. The curvature of the guide post is the same as that of the inner wall of the elbow.

[0018] After the guide post is placed in the elbow and fixed on the frame, the guide fastener on the welding unit is buckled on the guide post. The welding unit is started, and the operator pushes the welding unit to move along the guide post. Since the guide fastener is buckled on the guide post, the welding unit can move along the track of the guide post. During the movement, since the curvature and shape of the guide post are the same as those of the inner wall of the elbow, the welding unit can weld along the track of the splicing gap of the elbow, providing a moving track for the welding unit, eliminating the need for manual control of the moving direction of the welding unit, reducing the deviation of the walking route during the movement, and thus ensuring the welding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some exemplary embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the content of the exemplary embodiments of the present invention and these drawings.

[0020] Figure 1 It is a schematic structural diagram of the front of an elbow fixed chuck welding device in an embodiment of the present invention; Figure 2 is Figure 1 a schematic structural diagram of the back of an elbow fixed chuck welding device in the embodiment of Figure 3 is Figure 1 the enlarged view at A in Figure 4 is Figure 1 a schematic structural diagram of the fixed clamping member in the embodiment of Figure 5 is Figure 1 a schematic structural diagram of the welding unit in the embodiment of Figure 6 is Figure 1 a schematic structural diagram of the elbow installed on the fixed chuck in the embodiment of Figure 7 is Figure 1 a schematic structural diagram of the elbow not installed on the fixed chuck in the embodiment of Figure 8 is Figure 1 a schematic structural diagram of the positioning member in the embodiment of Figure 9 is Figure 1 a schematic structural diagram when the positioning member abuts against the elbow in the embodiment of Figure 10 is Figure 1 a schematic diagram of the driving method of the fixed chuck in the embodiment of

[0021] In the figure: 1. Frame, 2. Guide post, 3. Orthopedic member, 4. Welding unit, 5. Guide fastener, 6. Ball, 7. Swing frame, 8. Fixed clamping member, 9. Locking clamp, 901. Locking through hole, 902. Locking bolt, 11. Locking screw hole, 12. Installation screw hole, 13. Rubber pad, 14. Lifting frame, 15. Fixed chuck, 16. Positioning hole, 17. Positioning ear plate, 18. Locking jack, 19. Locking wedge plate, 20. Positioning member, 21. Adjusting screw, 23. Telescopic member, 24. Support sprocket, 25. Lifting chain. Detailed implementation manners

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention.

[0023] To make the drawings concise, only the parts related to the invention are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also can mean the case of "more than one", and "several" includes "two" and "more than two".

[0024] In this article, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the case where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0026] In the description of this embodiment, the orientation or positional relationship such as "up", "down", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0027] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0028] Such as Figures 1 to 9As shown, it shows a bend-fixed chuck welding device in an embodiment of the present invention, which is used to weld the splicing gap of two semi-circular bends to form a bend, and includes a frame 1, a guide post 2, a shaping member 3 and a welding unit 4. The frame 1 is the basic support structure of the entire welding device. The guide post 2 provides a walking track for the welding unit 4. A plurality of shaping members 3 are evenly distributed along the length direction of the guide post 2. The welding unit 4 uses a traditional welding machine in the prior art. The welding unit 4 integrates various components required for welding work. A guide fastener 5 is provided on the welding unit 4. The groove shape of the guide fastener 5 matches the shape of the guide post 2 and can be buckled on the guide post 2.

[0029] After splicing and spot-welding two semi-circular bends for preliminary fixation, place the bend on the frame 1. Place the guide post 2 inside the bend and make the plurality of shaping members 3 fully contact the inner wall of the bend. The curvature of the guide post 2 is the same as that of the inner wall of the bend.

[0030] After placing the guide post 2 into the bend and fixing it on the frame 1, buckle the guide fastener 5 on the welding unit 4 onto the guide post 2. Start the welding unit 4, and the operator pushes the welding unit 4 to move along the guide post 2. Since the guide fastener 5 is buckled on the guide post 2, the welding unit 4 can move along the track of the guide post 2. During the movement, since the curvature and shape of the guide post 2 are the same as those of the inner wall of the bend, the welding unit 4 can weld along the track of the bend splicing gap, providing a moving track for the welding unit 4, eliminating the need for manual control of the moving direction of the welding unit 4 and reducing the deviation of the walking route during the movement, thus ensuring the welding accuracy.

[0031] In some examples, as Figures 1 to 4 shown, two groups of guide posts 2 are symmetrically arranged, respectively located on both sides of the welding unit 4, guiding the welding unit 4 from both sides to ensure the stability of the welding unit 4 during the movement. The guide fasteners 5 on both sides of the welding unit 4 correspond to the two groups of guide posts 2, and balls 6 are embedded in the inner wall of the guide fasteners 5.

[0032] During the welding process, when the operator pushes the welding unit 4 to move along the guide post 2, since the guide fastener 5 is buckled on the guide post 2, the movement of the welding unit 4 drives the guide fastener 5 to move on the guide post 2. The balls 6 on the inner wall of the guide fastener 5 roll on the surface of the guide post 2, converting the sliding friction between the guide fastener 5 and the guide post 2 into rolling friction. This rolling friction method greatly reduces the friction between the two, enabling the welding unit 4 to move more smoothly along the guide post 2.

[0033] At the same time, the guide columns 2 and guide fasteners 5 symmetrically arranged on both sides jointly guide the welding unit 4, further avoiding possible deviation or shaking of the welding unit 4 during movement, thereby further improving the guiding accuracy and ensuring that the welding unit 4 can be welded along the trajectory of the elbow splicing gap.

[0034] In some examples, such as Figures 1 to 2 As shown, two groups of swing frames 7 are swingably arranged on the frame 1, and the two groups of swing frames 7 are symmetrically distributed. Fixed clamps 8 are arranged at adjacent ends of the two groups of swing frames 7, and the rotation axis of the swing frame 7 coincides with the central axis of the elbow.

[0035] The drive of the swing frame 7 can be achieved by Figure 1 The telescopic cylinder shown is implemented by, specifically, hingedly connecting the two ends of the telescopic cylinder to the surface of the fixed chuck 15 and the middle position of the swing frame 7 respectively, so that the swing frame 7 is driven to swing by the extension and contraction of the telescopic cylinder.

[0036] During welding, the elbow that has been spliced ​​and initially fixed by spot welding is first placed on the frame 1. Then the swing frame 7 is started, so that the two sets of swing frames 7 swing in a circle around the rotation axis that is concentric with the elbow. Since the rotation axis of the swing frame 7 is concentric with the elbow, during the swinging process of the swing frame 7, the fixed clamps 8 at the ends of the swing frame 7 can move along the circumference of the elbow, gradually approaching the two ends of the elbow, so that the two sets of fixed clamps 8 are closed, clamping the two ends of the elbow, and realizing the precise positioning of the elbow.

[0037] In some examples, such as Figures 3 to 4 As shown, locking clips 9 are provided at both ends of the guide column 2. The locking clips 9 adopt a two-half snap-fit ​​structure, and the two halves are bolted together, so that they can be tightly clamped on the guide column 2. A locking through hole 901 is provided on the locking clip 9. When the guide column 2 is installed in the elbow, the locking bolt 902 is passed through the locking through hole 901 and threaded into the locking screw hole 11, so that the locking clip 9 is positioned on the fixing clamp 8, so that the guide column 2 is fixed on the fixing clamp 8, ensuring that the guide column 2 will not be displaced during the welding process, and providing a stable and reliable guide for the welding unit 4.

[0038] The circumferential surface of the guide column 2 is provided with a plurality of mounting screw holes 12 along its length direction. One end of the orthopedic component 3 is designed as an external thread structure. The orthopedic component 3 is connected to the guide column 2 by screwing the threaded end of the orthopedic component 3 into the mounting screw hole 12. The number of orthopedic components 3 to be installed can be selected according to the length of the elbow. The other end of the orthopedic component 3 is provided with a rubber pad 13 for abutting the inner wall of the elbow. The rubber pad 13 can increase the friction with the inner wall of the elbow to ensure that the orthopedic component 3 does not slide easily during the abutment process.

[0039] During the welding stage, first place the locking clamp 9 at both ends of the guiding column 2, but do not tighten the bolts, keeping the locking clamp 9 in a movable state on the guiding column 2. Place the guiding column 2 inside the elbow, and make one end of the rubber pad 13 of the orthopedic part 3 abut against the inner wall of the elbow. Adjust the position of the locking clamp 9 on the guiding column 2 according to the positions of the fixed clamps 8 at both ends of the elbow. Then tighten the bolts on the locking clamp 9 so that it clamps onto the guiding column 2. Next, install the locking bolt 902, pass it through the locking through-hole 901 and thread it into the locking screw hole 11, thereby fixing both ends of the guiding column 2 to the fixed clamps 8 at both ends of the elbow, completing the positioning of the guiding column 2.

[0040] In some examples, as Figures 1 to 2 shown, the lifting frame 14 is slidably arranged on the frame 1, and its function is to adjust the height of the elbow to meet the requirements of different welding processes. The fixed chuck 15 is rotatably arranged on the lifting frame 14, and the swing frame 7 is swingably arranged on the fixed chuck 15. Two positioning holes 16 are symmetrically formed on the fixed chuck 15. Positioning ear plates 17 are pre-welded on the outer wall of the elbow, and the positioning ear plates 17 are rectangular plate-like structures. Locking insertion holes 18 are formed on the positioning ear plates 17. The locking wedge plate 19 is slidably arranged on the back of the fixed chuck 15 and adopts a wedge-shaped structure with a gradually increasing width.

[0041] Since the inner wall track of the elbow is arc-shaped, when the welding unit 4 moves along its inner wall, the moving track is also arc-shaped, which may cause the welding unit 4 to move uphill or downhill during the movement, which may affect the moving speed and stability of the welding unit 4, thereby affecting the welding effect. Therefore, the fixed disc 15 is designed as a rotatable structure, which can make an adaptive slow rotation during the movement of the welding unit 4, so that the area where the welding unit 4 is welding is always in a state close to horizontal, and the welding unit 4 walks along a direction close to horizontal, thereby ensuring the stability of its moving speed; The structure for driving the fixed chuck 15 can choose to directly install a motor on the frame 1 and directly connect the output shaft of the motor to the center of the fixed chuck 15, or as Figure 10 shown, install a large gear on the central axis of the fixed chuck 15, install a small gear on the output shaft of the motor, mesh the large gear with the small gear, drive the small gear to rotate by the output shaft of the motor, and then drive the large gear to rotate by the small gear, thereby driving the fixed chuck 15 to rotate.

[0042] Before processing the butt-welding elbow, first pre-weld the positioning ear plates 17 at appropriate positions on the outer wall of the elbow. When positioning the elbow is required, first hoist and move the elbow, and insert the positioning ear plates 17 on the outer wall of the elbow through the positioning holes 16 of the fixed chuck 15. Subsequently, push the locking wedge plate 19 on the back of the fixed chuck 15 (the side away from the elbow is the back) so that it inserts into the locking jack 18. Since the locking wedge plate 19 is of a wedge-shaped structure, the positioning ear plates 17 can be tightly squeezed and positioned in the positioning holes 16, thereby realizing the locking of the elbow on the fixed chuck 15. At this time, the swing frame 7 swings, driving the fixed clamping member 8 close to both ends of the elbow to further position both ends of the elbow. Finally, adjust the height of the lifting frame 14 so that the elbow reaches an appropriate welding height.

[0043] Throughout the process, due to the design of the positioning ear plates 17 and the fixed chuck 15, the support and positioning of the elbow are realized by using the side wall of the elbow, so that the splicing gap of the elbow can be fully exposed at all angles and will not be blocked by the positioning structure, providing a good operating space for the welding work.

[0044] In some examples, as Figure 8 shown, two positioning members 20 are symmetrically and slidably arranged on the fixed chuck 15, located on both sides of the elbow respectively. The positioning members 20 are columnar. In order to fully fit the outer wall of the elbow, the radian of the positioning members 20 is configured to be the same as that of the elbow. An adjustment screw rod 21 is connected between the two positioning members 20, and both ends of the adjustment screw rod 21 are respectively threadedly connected to the two positioning members 20. The adjustment screw rod 21 adopts a two-way screw design, that is, the thread directions at both ends of the screw rod are opposite. When the adjustment screw rod 21 is rotated, due to the different thread directions at both ends, the two positioning members 20 will move towards or away from each other.

[0045] After fixing the elbow on the fixed chuck 15 through the positioning ear plates 17, use the adjustment screw rod 21 to adjust the positioning members 20. Rotate the adjustment screw rod 21 so that its two ends respectively drive the two positioning members 20 to move towards each other. The positioning members 20 gradually approach the outer walls on both sides of the elbow. Since the radian of the positioning members 20 is the same as that of the elbow, the positioning members 20 can fit well with the outer wall of the elbow and support in the gap between the elbow and the fixed chuck 15. At this time, the positioning members 20 simultaneously abut against the outer wall of the elbow and the fixed chuck 15, forming a support structure between the elbow and the fixed chuck 15.

[0046] Since the side wall of the elbow and the fixed chuck 15 are in a line contact form, the positioning ear plate 17 will bear a large stress. Therefore, by providing a positioning member 20 with the same curvature as the elbow and propping the positioning member 20 between the elbow and the fixed chuck 15, the positioning member 20 abuts against both the elbow and the fixed chuck 15 simultaneously, forming a stable triangular support structure, which solves the problem of poor stability of the side wall of the elbow when relying solely on the positioning ear plate 17 for positioning, enhances the positioning stability of the elbow on the fixed chuck 15, helps to improve the welding accuracy, and reduces the sway of the elbow.

[0047] In some examples, such as Figure 2 shown, the telescopic member 23 is arranged on the frame 1. The telescopic member 23 generally adopts a hydraulic cylinder. Taking the hydraulic cylinder as an example, the cylinder body is fixed on the frame 1, and the piston extending end of the hydraulic cylinder is the telescopic end. The support sprocket 24 is rotatably arranged at the top of the frame 1 to provide support and guidance for the lifting chain 25. The lifting chain 25 is connected between the telescopic end of the telescopic member 23 and the lifting frame 14. The lifting chain 25 bypasses the support sprocket 24, one end is connected to the telescopic end of the telescopic member 23, and the other end is fixedly connected to the lifting frame 14, forming a transmission system.

[0048] When it is necessary to adjust the height of the lifting frame 14, start the telescopic member 23. When the telescopic end of the telescopic member 23 rises, it drives one end of the lifting chain 25 connected thereto to rise, and the other end of the lifting chain 25 connected to the lifting frame 14 descends, thereby driving the lifting frame 14 to move downward. When the telescopic end of the telescopic member 23 descends, it drives one end of the lifting chain 25 to descend. Under the action of the support sprocket 24, the other end of the lifting chain 25 rises, and further makes the lifting frame 14 move upward. By controlling the telescopic movement of the telescopic member 23, the lifting of the lifting frame 14 is realized to meet the requirements of different welding processes for the height of the elbow.

[0049] In some examples, a rubber layer is provided on the surface of the guide post 2, which can increase the friction with the ball 6 and prevent the ball 6 on the inner wall of the guide fastener 5 from slipping when rolling on the surface of the guide post 2, thereby ensuring the stability of the movement of the welding unit 4.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An elbow fixed chuck welding device is used to weld the splicing gap of two semi-circular elbows to form an elbow. Two positioning ear plates (17) are pre-welded on the same side of the elbow. A locking jack (18) is provided through the positioning ear plate (17). It is characterized in that, It includes a frame (1), guide columns (2), orthopedic members (3) and a welding unit (4). A plurality of the orthopedic members (3) are provided and are arranged on the guide columns (2) at intervals along the length direction of the guide columns (2). The orthopedic members (3) are used to abut against the inner wall of the elbow. A guide fastener (5) is provided on the welding unit (4), and the guide fastener (5) is used to buckle on the guide columns (2) and slide along the guide columns (2). The guide columns (2) are used to extend into the elbow and are detachably connected to the frame (1). The guide columns (2) have the same curvature as the inner wall of the elbow. The orthopedic members (3) are used to abut against the inner wall of the elbow, so that the welding unit (4) moves along the guide columns (2) and welds the splicing gap of the elbow.

2. The elbow fixed chuck welding device according to claim 1, characterized in that, Two groups of the guide columns (2) are provided and are symmetrically located on both sides of the welding unit (4). Guide fasteners (5) are provided on both sides of the welding unit (4). Ball bearings (6) are embedded on the inner wall of the guide fasteners (5), and the ball bearings (6) are used to rollingly cooperate with the peripheral wall of the guide columns (2).

3. The elbow fixed chuck welding device according to claim 1, characterized in that, It further includes a swing frame (7) swingably arranged on the frame (1). There are two groups of the swing frames (7) and they are symmetrically located at both ends of the guide columns (2). The rotation axis of the swing frame (7) is configured to be concentric with the elbow. Fixed clamping members (8) are provided at the lower ends of the two groups of the swing frames (7), and the two groups of the swing frames (7) can drive the two groups of the fixed clamping members (8) to swing towards each other to clamp the two ends of the elbow.

4. The elbow fixed chuck welding device according to claim 3, characterized in that, A locking clip (9) is sleeved on the end of the guide column (2), and the locking clip (9) is connected to the fixed clamping member (8) through a connecting member.

5. The elbow fixed chuck welding device according to claim 1, characterized in that, A plurality of radially extending mounting screw holes (12) are provided on the guide column (2), and the plurality of 12 are arranged at intervals along the extending direction of the guide column (2). One end of the orthopedic member (3) is threadedly connected in the mounting screw hole (12), and the other end has a rubber pad (13) for abutting against the inner wall of the elbow.

6. The elbow fixed chuck welding device according to claim 3, characterized in that, A lifting frame (14) is slidably arranged on the frame (1). A fixed chuck (15) is rotatably arranged on the lifting frame (14). The swing frame (7) is swingably arranged on the fixed chuck (15). The fixed chuck (15) is used to drive the swing frame (7) to rotate to adjust the placement angle of the elbow. Two positioning holes (16) for the positioning ear plates (17) on the outer wall of the elbow to penetrate and insert are symmetrically provided on the fixed chuck (15). A locking wedge plate (19) is slidably arranged on the back of the fixed chuck (15), and the locking wedge plate (19) can be inserted into the locking jack (18) to lock the elbow to the fixed chuck (15).

7. The elbow fixed chuck welding device according to claim 6, characterized in that, Two positioning members (20) are slidably arranged on the fixed chuck (15) at an upper and lower interval. The radian of the positioning members (20) is configured to be the same as the radian of the elbow. The fixed chuck (15) can contact the peripheral wall of the elbow to form a contact line. The two positioning members (20) are respectively located on the upper and lower sides of the contact line and can approach each other and support against the outer wall of the elbow and the fixed chuck (15).

8. The elbow fixed chuck welding device according to claim 7, characterized in that, On the back of the fixed chuck (15), there are two adjusting screws (21) extending in the up and down direction. The two adjusting screws (21) are respectively located at both ends of the elbow in one-to-one correspondence. Both ends of the same adjusting screw (21) are respectively threadedly connected to the two positioning members (20). The adjusting screw (21) is a bidirectional screw, and the two adjusting screws (21) can synchronously drive the two positioning members (20) to move towards each other to abut between the outer wall of the elbow and the fixed chuck (15).

9. The elbow fixed chuck welding device according to claim 6, characterized in that, On the frame (1), there is a telescopic member (23). A support sprocket (24) is rotatably provided on the upper part of the frame (1). An elevator chain (25) is connected between the telescopic end of the telescopic member (23) and the lifting frame (14). The elevator chain (25) meshes with the support sprocket (24).

10. The elbow fixed chuck welding device according to claim 1, characterized in that, The outer circumference of the guide post (2) has a rubber layer.

Images