Automatic welding device for flange plate of large-diameter steel pipe

Abstract

The application solves the problem of insufficient rotation efficiency and stability of steel pipe and flange plate during welding, relates to the technical field of flange plate welding, and particularly relates to an automatic welding device for large-diameter steel pipe flange plates, which comprises a frame seat and a welding mechanism, the frame seat is provided with an electric roller frame for driving the circumferential rotation of the steel pipe, the frame seat is provided with a clamping mechanism penetrating through the steel pipe, a transmission structure is arranged between the electric roller frame and the clamping mechanism, when the electric roller frame is operated, the transmission structure drives the clamping mechanism pressing against the inner wall of the steel pipe to rotate synchronously, so that the inner wall and the outer wall of the steel pipe are subjected to torque in the same direction, the clamping mechanism comprises a round rod coinciding with the axis of the steel pipe, and a cylinder clamp is arranged on the rear end surface of the round rod. The application can make the inner side and the outer side of the steel pipe subjected to the same direction of rotation torque, realize double driving, effectively improve the efficiency and stability of the rotation of the steel pipe, and thus ensure the effect of subsequent welding of the steel pipe and the flange plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flange welding, in particular to an automatic welding device for large-diameter steel pipe flanges. BACKGROUND

[0002] The conventional operation when welding steel pipes and flanges is to place the steel pipe on a roller frame, drive the steel pipe and flange placed above it to rotate through the rotation of the roller frame, and cooperate with the welding mechanism set at the set point to perform a whole circle welding operation on the joint between the steel pipe and the flange.

[0003] However, in the conventional operation, only the outer wall of the steel pipe is subjected to the torque of the roller frame, so the rotating friction force received by the steel pipe is uneven, the rotational inertia is large, the torque transmission efficiency is low, and the local deformation is possible, resulting in unsatisfactory rotation effect of the steel pipe. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application aims to provide an automatic welding device for large-diameter steel pipe flanges to solve the problem of insufficient rotation efficiency and stability of the steel pipe and flange during welding as mentioned in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: an automatic welding device for large-diameter steel pipe flanges, comprising a frame seat and a welding mechanism, the frame seat is provided with an electric roller frame for driving the steel pipe to rotate circumferentially, the frame seat is provided with a clamping mechanism penetrating through the steel pipe, a transmission structure is provided between the electric roller frame and the clamping mechanism, when the electric roller frame is operated, the transmission structure drives the clamping mechanism pressing against the inner wall of the steel pipe to rotate synchronously, so that the inner wall and the outer wall of the steel pipe are subjected to torque in the same direction;

[0006] The clamping mechanism comprises a circular rod coinciding with the axis of the steel pipe, a cylinder clamp is installed on the rear end surface of the circular rod, the cylinder clamp is composed of a clamp body and two clamp heads, a lifting bearing frame is sleeved on the surface of the circular rod, and a butt joint assembly is installed on the rear side of each clamp head;

[0007] The butt joint assembly comprises a telescopic structure, a butt joint plate is installed between the front side of the telescopic structure and the rear side of the clamp head, and a plug-in column with a length consistent with the thickness of the steel pipe is installed on the front side of the telescopic structure.

[0008] As a preferred, the telescopic structure comprises a U-shaped plate, the U-shaped plate is installed on the rear side of the butt joint plate, an extension plate is slidably installed in the interior of the U-shaped plate, the plug-in column is installed on the front side of the extension plate, a notch is formed in the top of the extension plate, a limiting vertical plate is installed between the top wall and the bottom wall of the U-shaped plate, and the limiting vertical plate is arranged through the notch.

[0009] As preferred, a threaded screw rod is rotatably installed between the U-shaped plate and the limiting vertical plate, and the threaded screw rod is rotatably connected with the extension plate.

[0010] As preferred, the electric roller frame comprises two shaft body rods installed on the top of the frame seat through bearing seats, a support wheel disc is fixedly sleeved on the outer surface of the shaft body rod, a driving motor is installed on the frame seat, and a belt wheel transmission one is installed between the output end of the driving motor and the two shaft body rods.

[0011] As preferred, the transmission structure comprises a positioning frame installed on the top edge of the frame seat, a rotating shaft is rotatably installed on the positioning frame, a spur gear is installed on the outer surface of the rotating shaft and one of the shaft body rods, the two spur gears are meshed with each other, and a belt wheel transmission two is detachably installed between the rotating shaft and the round rod.

[0012] As preferred, the lifting bearing frame comprises a double bearing sleeve sleeved on the surface of the round rod, and a hydraulic cylinder one is installed between the double bearing sleeve and the frame seat.

[0013] As preferred, a hydraulic cylinder two is installed on the frame seat, and a supporting plate for supporting the flange plate is installed on the top end of the hydraulic cylinder two.

[0014] As preferred, an electric pushing structure is further installed on the frame seat, for pushing the steel pipe and the flange plate from front to back, so that the joint of the two corresponds to the welding station of the welding mechanism.

[0015] By the above technical scheme, the present application provides the automatic welding device for large-diameter steel pipe flange plate, and at least has the following beneficial effects:

[0016] 1. Through the cooperative operation of the electric roller frame, the transmission structure and the clamping mechanism, the inside and outside of the steel pipe can be subjected to the same direction of the rotational torque, double driving is realized, the efficiency and stability of the steel pipe rotation can be effectively improved, and the welding effect of the subsequent steel pipe and flange plate is ensured.

[0017] 2. By using the same driving source to apply the rotational torque to the inside and outside of the steel pipe, the driving reliability can be enhanced, the slipping can be prevented, the control precision can be improved, and the deformation can be reduced.

[0018] 3. In the welding process, the steel pipe and the flange plate can be rotated at the same frequency and in the same direction, the relative motion between the two can be effectively eliminated, the welding point is relatively stationary, the molten pool is stable, the subsequent weld forming is more uniform, and continuous welding can be realized, and the efficiency is improved.

[0019] 4、The application makes the rotating direction of the rotating shaft opposite to the shaft body rod, and the cooperation of the belt wheel transmission two controls the rotating direction of the round rod and the rotating shaft, and the direction of the rotating of the steel pipe under the action of the electric roller frame is consistent, so that the torsional moments on the inner and outer sides of the steel pipe are in the same direction. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 It is a schematic diagram of the mounting structure of the electric roller frame and the frame seat of the present application;

[0023] Figure 3 It is a schematic diagram of the structure of the clamping mechanism of the present application;

[0024] Figure 4 It is a schematic diagram of the structure of the clamp head and the adapter plate of the present application;

[0025] Figure 5 It is a schematic diagram of the split structure of the docking assembly of the present application;

[0026] Figure 6 It is a schematic diagram of the structure of the transmission structure of the present application;

[0027] Figure 7 It is a schematic diagram of the position structure of the plug-in column and the flange plate of the present application.

[0028] In the drawings:

[0029] 1, frame seat; 101, hydraulic cylinder two; 102, supporting plate; 103, electric push structure;

[0030] 2, welding mechanism;

[0031] 3, electric roller frame; 301, shaft body rod; 3011, support wheel disc; 302, drive motor; 303, belt wheel transmission one;

[0032] 4, clamping mechanism; 401, round rod; 402, cylinder clamp; 4021, clamp body; 4022, clamp head; 403, lifting bearing frame; 4031, double bearing set; 4032, hydraulic cylinder one;

[0033] 5, transmission structure; 501, positioning frame; 502, rotating shaft; 503, spur gear; 504, belt wheel transmission two;

[0034] 6, butt joint assembly; 601, telescopic structure; 6011, U-shaped plate; 6012, extension plate; 6013, notched groove; 6014, limiting vertical plate; 6015, threaded screw rod; 602, connecting plate; 603, insertion column. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0036] Embodiment one

[0037] Please refer to Figures 1-7 The present embodiment proposes an automatic welding device for large-diameter steel pipe flange plates, which can realize welding operation by driving the steel pipe and the flange plate to rotate one circle. The basic structure of the automatic welding device for steel pipe flange plates is composed of a frame seat 1 and a welding mechanism 2. The welding mechanism 2 has functions such as welding, angle height adjustment, image detection, which are consistent with the prior art, and therefore will not be described in detail here. An electric roller frame 3 is installed on the frame seat 1, and a clamping mechanism 4 that passes through the steel pipe is arranged on the frame seat 1. The clamping mechanism 4 includes a round rod 401 coinciding with the axis of the steel pipe, and a cylinder clamp 402 is installed on the rear side end surface of the round rod 401. The cylinder clamp 402 is composed of a clamp body 4021 and two clamp heads 4022. A transmission structure 5 is arranged between the electric roller frame 3 and the clamping mechanism 4. The electric roller frame 3, the clamping mechanism 4 and the transmission structure 5 are cooperatively applied. Specifically, when the electric roller frame 3 is running, firstly, a rotating torque can be generated on the outer wall of the steel pipe placed on the electric roller frame 3; secondly, after the cylinder clamp 402 in the clamping mechanism 4 operates, the two clamp heads 4022 can move towards opposite directions until the opposite sides of the two clamp heads 4022 tightly fit the inner wall of the steel pipe, so that an outward extrusion force is generated on the inner side of the steel pipe, realizing the fixing effect of the steel pipe. When the electric roller frame 3 runs, the clamping mechanism 4 is controlled to rotate by the transmission structure 5, and a rotating torque is also generated on the inner side of the steel pipe, thereby improving the efficiency and stability of the rotation of the steel pipe. At the same time, cooperating with the welding mechanism 2, more uniform and uninterrupted welding effect between the steel pipe and the flange plate can be achieved, and the quality of the final welding is improved.

[0038] Specifically, the electric roller stand 3 includes two shaft body rods 301 installed on the top of the frame seat 1 through bearing seats, the outer surface of the shaft body rod 301 is fixedly sleeved with a support wheel disc 3011, a driving motor 302 is installed on the frame seat 1, and a belt wheel transmission one 303 is installed between the output end of the driving motor 302 and the two shaft body rods 301. In actual application, by running the driving motor 302, the output shaft thereof rotates towards a designated direction, cooperates with the belt wheel transmission one 303, and can transmit the rotating force to the two shaft body rods 301, so as to drive the two shaft body rods 301 and the support wheel disc 3011 to rotate in the same direction. The static friction between the surface of the support wheel disc 3011 and the circular pipe will act on the circular pipe to generate a tangential force on the surface of the circular pipe, so as to form a torque for rotating the circular pipe, and finally drive the circular pipe to rotate in the opposite direction of the shaft body rod 301.

[0039] As described above, in the conventional case, when the flange plate is aligned and welded with the steel pipe, it is necessary to keep the same direction and rotating speed as the steel pipe. In order to effectively achieve this effect, as shown in Figure 1 、 Figures 3-7 two clamping heads 4022 are installed on the rear side of the two clamping heads 4022, the docking assembly 6 includes an extension structure 601, the front side of the extension structure 601 and the rear side of the clamping head 4022 are installed with a connecting plate 602, and the front side of the extension structure 601 is installed with a plug-in column 603 with a length consistent with the thickness of the steel pipe. It is known that the flange plate is provided with a double number of hole grooves, and the connecting line of the two opposite hole grooves intersects with the axis of the flange plate. In the conventional case, the extension structure 601 needs to be adjusted according to the difference between the hole grooves in the steel pipe and the flange plate, so that when the air cylinder clamp 402 operates to control the two clamping heads 4022 to tightly adhere to the inner wall of the steel pipe, the plug-in column 603 on the extension structure 601 in the two docking assemblies 6 can be exactly on the same front and rear axis as the two opposite hole grooves in the middle of the flange plate. In addition, when the clamping head 4022 of the air cylinder clamp 402 is attached to the inner wall of the steel pipe, only the circumferential rotation of the steel pipe is limited, and when the forward and backward pushing force is applied to the steel pipe, the limitation is not great.

[0040] When the extension structure 601 is adjusted according to the difference between the hole grooves in the steel pipe and the flange plate, when the air cylinder clamp 402 is in the original state, the distance between the opposite sides of the two adjusted extension structures 601 is less than the inner diameter of the steel pipe and the flange plate, so it does not affect the subsequent flange plate right rear outward and the steel pipe.

[0041] The application steps of the clamping mechanism 4 and the docking assembly 6 are as follows:

[0042] Firstly, the steel pipe is placed on the electric roller stand 3, and the adjusted circular rod 401 is coaxial with the center of the steel pipe, and then the flange plate is docked with the rear side of the steel pipe, at this time the docking assembly 6 is located at the rear side of the flange plate;

[0043] Then run the air cylinder clamp 402, control two clamp head 4022 in it moves towards opposite direction, finally two clamp head 4022 opposite side and the inner wall of steel pipe closely, so that the difference between the steel pipe inner wall and the hole groove on the flange plate has been previously adjusted by telescopic structure 601, the two plug-in column 603, the center of which is coaxial with the two opposite hole grooves in the middle of the flange plate respectively, and the spacing is adjusted;

[0044] After that, the flange plate is hung on the two plug-in columns 603 along the opposite two hole grooves, and the steel pipe is pushed from front to back to make its back side adhere to the flange plate. After running the driving motor 302, the steel pipe inside and outside can be driven to rotate in the same frequency and direction by the flange plate through the application of multiple structure cooperation, which can effectively eliminate relative motion, make the welding point relatively stationary, stabilize the molten pool, ensure the subsequent weld forming more uniform, and realize continuous welding, improve efficiency.

[0045] Example two

[0046] As shown in Figure 4 , Figure 5 and Figure 7 , the telescopic structure 601 includes a U-shaped plate 6011 installed on the rear side of the adapter plate 602. The inside of the U-shaped plate 6011 is slidably installed with an extension plate 6012. The plug-in column 603 is installed on the front side of the extension plate 6012. The top of the extension plate 6012 is provided with a slot 6013. The top wall and the bottom wall of the U-shaped plate 6011 are provided with a limiting vertical plate 6014 which passes through the slot 6013.

[0047] The above structure cooperates when working. By rotating the threaded screw rod 6015, the extension plate 6012 can be moved along the inner wall of the U-shaped plate 6011 to the side to adjust the overall length between the two, so as to adjust the position of the plug-in column 603 according to the different spacing between each group of steel pipe inner wall and hole groove on the flange plate, and improve the adaptability of the whole butt joint assembly 6.

[0048] Example three

[0049] As shown in Figure 1 and Figure 6As shown, the transmission structure 5 includes a positioning frame 501 mounted on the top edge of the frame base 1, a rotating shaft 502 rotatably mounted on the positioning frame 501, a straight gear 503 mounted on the outer surface of the rotating shaft 502 and one of the shaft body rods 301, and the two straight gears 503 are engaged with each other, and the detachable belt wheel transmission two 504 is installed between the rotating shaft 502 and the circular rod 401. As can be known from the above embodiment one, when the driving motor 302 operates, the two shaft body rods 301 can be controlled to rotate through the belt wheel transmission one 303, and combined with the transmission structure 5, the rotating shaft 502 can be controlled to rotate in the direction opposite to the shaft body rod 301 through the engagement of the two straight gears 503, and then cooperated with the belt wheel transmission one 303, the circular rod 401 is driven to rotate in the same direction as the rotating shaft 502, and at the same time, the direction of the steel pipe under the action of the motorized roller frame 3 is consistent, so that the torsional moments received by the inner and outer sides of the steel pipe are in the same direction.

[0050] Embodiment four

[0051] Under normal circumstances, the steel pipes and flange plates required for welding have various sizes, so that after the steel pipes of different sizes are placed on the motorized roller frame 3, the heights of the circumferential axes are different, and the circular rod 401 with a fixed height cannot be matched. In order to effectively solve this problem, as shown in Figure 1 and Figure 6 As shown, the lifting bearing frame 403 is sleeved on the surface of the circular rod 401, the lifting bearing frame 403 includes a double bearing sleeve 4031 sleeved on the surface of the circular rod 401, and a hydraulic cylinder one 4032 is installed between the double bearing sleeve 4031 and the frame base 1. The lifting bearing frame 403 can support the circular rod 401 as a whole to maintain its balance, and does not affect the rotation of the circular rod 401. In addition, cooperating with the extension operation of the hydraulic cylinder one 4032, the height position of the circular rod 401 can be adjusted through the double bearing sleeve 4031, so that it is convenient to adjust according to the different sizes of the steel pipes and flange plates required for welding, and ensure that the circular rod 401 is always coincided with the circumferential axis of the steel pipe and flange plate.

[0052] According to the above embodiment three, the belt wheel transmission two 504 is detachably installed between the rotating shaft 502 and the circular rod 401, so that when the steel pipes and flange plates of different sizes are welded before and after, the corresponding belt wheel transmission two 504 needs to be replaced between the rotating shaft 502 and the circular rod 401 adjusted in height, so that the driving motor 302 can keep the transmission function of the circular rod 401 after operation.

[0053] In addition, a hydraulic cylinder 101 is installed on the frame base 1, and a support plate 102 for supporting the flange is installed on the top of the hydraulic cylinder 101. When the hydraulic cylinder 101 is running, according to its operating principle and function, the height position of the support plate 102 can be easily adjusted when the flange size changes, so that the adjusted flange, steel pipe and round rod 401 are coaxial.

[0054] Example 5

[0055] like Figure 1 As shown, an electric pusher structure 103 is also installed on the frame base 1. After the plug-in post 603 is inserted into the two holes on the flange, the electric pusher structure 103 is operated to cause it to generate a forward and backward pushing force on the steel pipe, so that the steel pipe is connected to the flange in the set position, so that the connection between the steel pipe and the flange corresponds to the welding position of the welding mechanism 2.

[0056] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic welding device for large-diameter steel pipe flanges, comprising a frame seat (1) and a welding mechanism (2), characterized in that: The frame seat (1) is provided with an electric roller frame (3) for driving the steel pipe to rotate circumferentially, and a clamping mechanism (4) penetrating through the steel pipe is arranged on the frame seat (1); a transmission structure (5) is arranged between the electric roller frame (3) and the clamping mechanism (4); when the electric roller frame (3) is operated, the transmission structure (5) drives the clamping mechanism (4) pressing against the inner wall of the steel pipe to rotate synchronously, so that the inner wall and the outer wall of the steel pipe are subjected to torque in the same direction; The clamping mechanism (4) comprises a round rod (401) coinciding with the axis of the steel pipe, a cylinder clamp (402) is arranged on the rear end surface of the round rod (401), the cylinder clamp (402) comprises a clamp body (4021) and two clamp heads (4022), a lifting bearing frame (403) is arranged on the surface of the round rod (401), and a butt joint assembly (6) is arranged on the rear side of each of the two clamp heads (4022). The butt joint assembly (6) comprises a telescopic structure (601), a connecting plate (602) is arranged between the front side of the telescopic structure (601) and the rear side of the clamp head (4022), and a plug-in column (603) with a length consistent with the thickness of the steel pipe is arranged on the front side of the telescopic structure (601). The telescopic structure (601) comprises a U-shaped plate (6011), the U-shaped plate (6011) is arranged on the rear side of the connecting plate (602), an extension plate (6012) is slidably arranged in the U-shaped plate (6011), the plug-in column (603) is arranged on the front side of the extension plate (6012), a notch (6013) is formed in the top of the extension plate (6012), a limiting vertical plate (6014) is arranged between the top wall and the bottom wall of the U-shaped plate (6011), and the limiting vertical plate (6014) passes through the notch (6013).

2. The automatic welding device for large-diameter steel pipe flange plates according to claim 1, characterized by: The U-shaped plate (6011) and the limiting vertical plate (6014) are rotatably connected through a threaded lead screw (6015), and the threaded lead screw (6015) is rotatably connected with the extension plate (6012).

3. The automatic welding device for large diameter steel pipe flange according to claim 1, characterized in that: The electric roller frame (3) comprises two shaft body rods (301) arranged on the top of the frame seat (1) through bearing seats, support wheel discs (3011) are fixedly arranged on the outer surfaces of the shaft body rods (301), a driving motor (302) is arranged on the frame seat (1), and a belt wheel transmission one (303) is arranged between the output end of the driving motor (302) and the two shaft body rods (301).

4. The apparatus for automatically welding a large diameter steel pipe flange according to claim 1, wherein: The transmission structure (5) comprises a positioning frame (501), the positioning frame (501) is arranged on the top edge of the frame seat (1), a rotating shaft (502) is rotatably arranged on the positioning frame (501), straight gears (503) are arranged on the outer surfaces of the rotating shaft (502) and one of the shaft body rods (301), the two straight gears (503) are meshed with each other, and a belt wheel transmission two (504) is detachably arranged between the rotating shaft (502) and the round rod (401).

5. The apparatus for automatically welding a large diameter steel pipe flange according to claim 1, wherein: The lifting bearing frame (403) comprises a double bearing sleeve (4031), the double bearing sleeve (4031) is arranged on the surface of the round rod (401), and a hydraulic cylinder one (4032) is arranged between the double bearing sleeve (4031) and the frame seat (1).

6. The apparatus for automatically welding a large diameter steel pipe flange according to claim 1, wherein: The frame base (1) is provided with a hydraulic cylinder II (101), and a supporting plate (102) for supporting the flange plate is arranged at the top end of the hydraulic cylinder II (101).

7. The apparatus for automatically welding a large diameter steel pipe flange according to claim 1, wherein: The frame base (1) is also provided with an electric pushing structure (103), which is used for pushing the steel pipe and the flange plate from front to back, so that the joint of the two corresponds to the welding station of the welding mechanism (2).

Images