Flame heating equipment for welding seam of thick plate winding drum

Abstract

The utility model relates to flame heating equipment for welding a welding seam of a thick plate winding drum, which belongs to the technical field of crane manufacturing and comprises a bottom frame, an upper frame and a lower frame. The middle frame is longitudinally and movably arranged at the top of the bottom frame; the driving equipment is arranged on the bottom frame and used for driving the middle frame to reciprocate; the sliding fit structure is arranged between the bottom frame and the middle frame and is used for ensuring the stability and the sliding performance of the middle frame; the top frame is located above the middle frame, and the height of the top frame can be adjusted through an adjusting device; according to the utility model, the plurality of flame guns are arranged and the middle frame reciprocates through the driving equipment, so that the plurality of flame guns on the top frame are driven to carry out dynamic heating along the welding seam direction, and compared with the traditional heating point position fixing mode, the temperature distribution of the welding seam area of the winding drum is more uniform; and the problem of local overheating or insufficient heating is avoided, so that the welding quality can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crane manufacturing, in particular to a flame heating device for welding thick plate drum welds. Background Art

[0002] The drum is a key load-bearing component in lifting and transporting machinery. The welded drum has light weight, strong bearing capacity and obvious performance advantages. Therefore, most of the drums of current large-scale lifting and transporting equipment use welded drums.

[0003] The welding quality has a vital impact on the safety performance of lifting machinery and the service life of the equipment. For the welding of thick plate rolls in a low temperature environment, preheating is required during the welding process to ensure the welding quality.

[0004] At present, the commonly used heating methods for large welding coils during welding are flame heating and far infrared heating. The existing flame heating method is: a fixed frame is used to clamp the drying gun, the heating point is fixed, and the temperature of the heating area is uneven.

[0005] Therefore, we designed a flame heating device for welding thick plate roll welds. Utility Model Content

[0006] In order to overcome the deficiencies in the background technology, the utility model discloses a flame heating device for welding thick plate roll welds.

[0007] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0008] A flame heating device for welding thick plate coil welds, comprising:

[0009] A bottom frame, used to be placed horizontally in the inner cavity of the reel to be welded;

[0010] An intermediate frame is longitudinally movably disposed on top of the bottom frame;

[0011] A driving device, arranged on the bottom frame, for driving the middle frame to move back and forth;

[0012] A sliding fit structure is provided between the bottom frame and the middle frame to ensure the stability and sliding performance of the middle frame;

[0013] A top frame, which is located above the middle frame and can be adjusted in height by an adjustment device;

[0014] A plurality of flame guns are arranged at equal intervals on both sides of the top frame to heat the roll with flames;

[0015] Infrared thermometer, mounted on the top frame, to monitor temperature.

[0016] Preferably, support cross bars are provided near both ends of the bottom surface of the bottom frame to accommodate coil welding operations of different diameters;

[0017] The supporting cross bar comprises a fixed sleeve and a movable insert rod, wherein the movable insert rod is axially movably inserted in the fixed sleeve and is locked in position by a locking bolt.

[0018] Preferably, the driving device includes a reduction motor installed on the bottom frame, a radial rotating rod arranged on the output shaft of the reduction motor, a rotating shaft and a bar frame arranged at the end of the radial rotating rod. The bar frame is correspondingly connected to the middle frame, and the inner cavity and the rotating shaft body are movably cooperated so that the reduction motor drives the radial rotating rod to rotate, and then drives the rotating shaft to move along a circle, so that the bar frame moves back and forth or swings, thereby realizing the reciprocating movement of the middle frame.

[0019] Preferably, the strip frames are arranged vertically and are correspondingly fixed to the middle frame.

[0020] Preferably, one end of the bar frame is hinged to the bottom frame, and is movably connected to the middle frame via a movable shaft running through its inner cavity.

[0021] Preferably, the adjusting device comprises a screw rod, the lower end of which is rotatably connected to the middle frame, and the upper end of which passes through the top frame and is threadedly engaged therewith.

[0022] Preferably, the adjusting device comprises a screw rod and a pressing nut, wherein the lower end of the screw rod is fixed to the middle frame and the upper end thereof passes through the top frame, and the pressing nut is located below the top frame and cooperates with the screw rod thread.

[0023] Preferably, the longitudinal movement stroke of the intermediate frame is smaller than the distance between two adjacent flame guns on the same side.

[0024] Preferably, the distance between two adjacent flame guns on the same side is 450-550 mm, and the distance between two rows of flame guns is 160-180 mm.

[0025] Preferably, the infrared thermometer is located in the middle of two flame guns adjacent to each other in the longitudinal direction.

[0026] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0027] 1. The setting of multiple flame guns and the reciprocating movement of the middle frame through the driving device drive the multiple flame guns on the top frame to dynamically heat along the weld direction. Compared with the traditional fixed heating point method, it ensures that the temperature distribution in the roll weld area is more uniform, avoids local overheating or insufficient heating, and can effectively improve the welding quality.

[0028] 2. The setting of the supporting cross bar enables the flame heating equipment to be applicable to coil welding operations of different diameters and sizes, which not only increases the application range of the equipment, but also improves the flexibility and convenience of operation.

[0029] 3. The design of the sliding fit structure ensures the stability of the middle frame during movement. At the same time, the height of the top frame can be accurately adjusted through the adjustment device to meet the needs of different welding positions. These features work together to ensure the smooth and reliable operation of the flame heating equipment during the entire heating process.

[0030] 4. The infrared thermometer installed on the top frame can monitor the temperature changes in the heating area in real time and adjust the gas flow of the flame gun accordingly. It can not only achieve precise control of the temperature of the welding area of ​​the workpiece, but also effectively prevent the risk of damaging material properties due to excessive temperature, further ensuring the quality and safety of welding.

[0031] 5. The distance setting between two adjacent flame guns and the design of the moving stroke of the middle frame form a heat diffusion zone, which helps to absorb the excess heat that may be generated when the flame gun reaches the extreme position, ensure the overall temperature of the roll is balanced, and avoid abnormally high temperature in specific positions, which affects the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the utility model;

[0033] Figure 2 This is the front view of the utility model when in use;

[0034] Figure 3 It is a partial assembly diagram of the bottom frame, the middle frame and the driving device in the utility model;

[0035] Figure 4 for Figure 3 Right view of;

[0036] Figure 5 It is a partial assembly schematic diagram of another structure of the bottom frame, the middle frame and the driving device in the utility model.

[0037] In the figure: 1. bottom frame; 2. supporting cross bar; 21. fixed sleeve; 22. movable plug rod; 23. locking bolt; 3. middle frame; 4. driving device; 41. reduction motor; 42. radial rotating rod; 43. rotating shaft; 44. bar frame; 45. movable shaft; 5. sliding fit structure; 51. linear slide; 52. roller; 6. top frame; 7. adjusting device; 71. screw; 72. top pressure nut; 8. flame gun; 9. infrared thermometer. DETAILED DESCRIPTION

[0038] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. to indicate directions or positional relationships, they only correspond to the drawings of the present application, in order to facilitate the description of the present invention; it should be understood that if there are terms such as "end", "side", "end part", "lateral", "lateral", "transverse", "longitudinal", etc. to indicate directions or positional relationships, they only correspond to the length and width of the corresponding parts, that is, "end part" indicates the head and tail areas in the length direction of the corresponding part, and "side part" indicates the head and tail areas in the width direction of the corresponding part; this is for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction.

[0039] Combined with Figure 1-2 , a flame heating device for welding thick plate coil welds, comprising:

[0040] A bottom frame 1, used to be placed horizontally in the inner cavity of the reel to be welded;

[0041] As needed, in order to be suitable for reel welding operations of different diameters; a supporting cross bar 2 that can be axially extended and retracted is laterally provided at the bottom surface of the bottom frame 1 near the two ends; further, the supporting cross bar 2 includes a fixed sleeve 21 installed on the bottom surface of the bottom frame 1, and movable insertion rods 22 are axially movably inserted at both ends of the fixed sleeve 21; wherein, a locking bolt 23 is screwed on the end of the fixed sleeve 21, and the movable insertion rod 22 is squeezed by the locking bolt 23 to lock the axial position of the movable insertion rod 22.

[0042] A middle frame 3 which can move longitudinally and a driving device 4 which drives the middle frame 3 to move back and forth are provided on the top of the bottom frame 1;

[0043] As needed, a sliding fit structure 5 is provided between the bottom of the middle frame 3 and the top of the bottom frame 1; further, the sliding fit structure 5 can be a slide rail pair in the prior art, or it can be a linear slide groove 51 provided on the top surface of the bottom frame 1 and a roller 52 provided on the bottom surface of the middle frame 3, wherein the roller 52 rolls in the groove cavity of the linear slide groove 51; wherein, at least two rollers 52 are provided on the bottom surface of the sliding fit structure 5 along its longitudinal direction.

[0044] According to needs, in order to ensure the stability of the middle frame 3 , a sliding matching structure 5 is provided on both sides of the bottom frame 1 and the middle frame 3 .

[0045] Furthermore, combined with Figure 3-5The driving device 4 includes a reduction motor 41, and a radial rotating rod 42 is installed on the output shaft of the reduction motor 41. A rotating shaft 43 is provided at one end of the radial rotating rod 42. The rotating shaft 43 is matched with a bar frame 44, wherein the bar frame 44 is correspondingly connected to the middle frame 3. Specifically, the rotating shaft 43 is matched with the inner cavity of the bar frame 44, and more specifically, the rotating shaft 43 can move along the length direction of the bar frame 44. Specifically, the central axis direction of the output shaft of the reduction motor 41 is perpendicular to the moving direction of the middle frame 3. Preferably, the central axis direction of the output shaft of the reduction motor 41 is horizontal.

[0046] In a possible implementation, Figure 5 , the bar frame 44 is fixedly connected to the middle frame 3; that is, the operation of the reduction motor 41 can drive the radial rotating rod 42 to rotate, and then drive the rotating shaft 43 to move in a circle along the output shaft of the reduction motor 41, and then the rotating shaft 43 drives the bar frame 44 to move back and forth, thereby realizing the function of driving the middle frame 3 to move back and forth.

[0047] In another possible embodiment, Figure 3-4 , one end of the bar frame 44 is correspondingly connected and hinged to the bottom frame 1, and the middle frame 3 is provided with a movable shaft 45 inserted into the inner cavity of the bar frame 44, that is, the operation of the reduction motor 41 can drive the radial rotation rod 42 to rotate, and then drive the rotation shaft 43 to move in a circle along the output shaft of the reduction motor 41, and then the rotation drives the bar frame 44 to swing back and forth, and then drives the movable shaft 45 to move back and forth, realizing the function of driving the middle frame 3 to move back and forth. In this embodiment, the rotation center of the bar frame 44 and the output shaft of the reduction motor 41 are on the same vertical plane.

[0048] In order to reduce the length of the radial rotating rod 42 , the rotation center of the bar frame 44 and the movable axis 45 are respectively located on both sides of the rotating shaft 43 .

[0049] A liftable top frame 6 and an adjusting device 7 for adjusting the height of the top frame 6 are arranged above the middle frame 3 ; a plurality of flame guns 8 are arranged at equal intervals on both sides of the top frame 6 .

[0050] In a possible implementation, the adjusting device 7 may be a jack.

[0051] In a possible implementation, the adjusting device 7 may be a screw rod 71 rotatably connected to the middle frame 3 at the lower end, and the shaft of the screw rod 71 passes through the top frame 6 and is threadedly engaged with the top frame 6 .

[0052] In a possible implementation, Figure 2 The adjusting device 7 can be a screw rod 71 whose lower end is fixedly connected to the middle frame 3 , the rod body of the screw rod 71 passes through the top frame 6 , and a top pressing nut 72 is provided at a position of the rod body of the screw rod 71 below the top frame 6 .

[0053] As required, at least three adjusting devices 7 are provided. When there are three adjusting devices 7 , they are distributed in a triangular shape to ensure the stability of the top frame 6 . When there are four adjusting devices 7 , they are distributed in a rectangular shape.

[0054] According to the needs, the distance between two adjacent flame guns 8 on the same side is 450-550 mm, and the distance between the flame gun 8 and the weld is 80-90 mm in the horizontal direction; that is, the distance between two adjacent flame guns 8 in the longitudinal direction is 450-550 mm, and the distance between two rows of flame guns 8 is 160-180 mm. The number of flame guns 8 is set according to the length of the roll, and is not specifically limited here.

[0055] Preferably, the longitudinal movement distance of the middle frame 3 is 9 / 10 of the distance between two adjacent flame guns 8 on the same side.

[0056] In one example, the longitudinal movement distance of the middle frame 3 is nine-tenths of the distance between two adjacent flame guns 8 on the same side; for example, the distance between two adjacent flame guns 8 on the same side is 500mm, which is 450mm of the longitudinal movement distance of the middle frame 3; that is, in the longitudinal direction, the 50mm area between the two flame guns 8 is an area that is not directly heated by the flame gun 8, that is, the heat diffusion zone; after the flame gun 8 moves to the extreme position, it is necessary to change the moving direction, so that the position of the roll is heated longer than other positions, which easily leads to a temperature higher than the specified welding interlayer temperature. The existence of the heat diffusion zone can absorb the heat at this position, thereby ensuring the overall temperature balance of the roll, and preventing the temperature at this position from being higher than the specified welding interlayer temperature and affecting the welding quality.

[0057] As required, the top frame 6 is also equipped with an infrared thermometer 9. Specifically, according to the temperature value measured by the infrared thermometer 9, the gas flow of the flame gun 8 is controlled to increase or decrease the output of the flame gun 8, thereby achieving the purpose of controlling the temperature.

[0058] As required, the infrared thermometer 9 is located in the middle of two flame guns 8 adjacent to each other in the longitudinal direction.

[0059] In actual application, when the heating device is used, the flame gun 8 should be connected to a combustible gas source, such as liquefied gas, natural gas, etc.

[0060] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A flame heating device for welding thick plate drum welds, characterized in that: include: A bottom frame (1) is used to be placed horizontally in the inner cavity of the reel to be welded; An intermediate frame (3) is disposed on the top of the bottom frame (1) in a longitudinally movable manner; A driving device (4) is provided on the bottom frame (1) and is used to drive the middle frame (3) to move back and forth; A sliding matching structure (5) is provided between the bottom frame (1) and the middle frame (3) and is used to ensure the stability and sliding performance of the middle frame (3); A top frame (6) located above the middle frame (3) and having a height adjustable by an adjustment device (7); A plurality of flame guns (8) are arranged at equal intervals on both sides of the top frame (6) for performing flame heating on the roll; An infrared thermometer (9) is mounted on the top frame (6) to monitor the temperature.

2. The flame heating equipment for welding thick plate drum welds according to claim 1 is characterized in that: The bottom surface of the bottom frame (1) is provided with supporting cross bars (2) near both ends to accommodate welding operations of coils with different diameters; The supporting crossbar (2) comprises a fixed sleeve (21) and a movable insertion rod (22); the movable insertion rod (22) is axially movably inserted into the fixed sleeve (21) and is locked in position by a locking bolt (23).

3. The flame heating equipment for welding thick plate drum welds according to claim 1 is characterized in that: The driving device (4) comprises a reduction motor (41) mounted on the bottom frame (1), a radial rotating rod (42) arranged on the output shaft of the reduction motor (41), a rotating shaft (43) arranged at the end of the radial rotating rod (42), and a strip frame (44); the strip frame (44) is correspondingly connected to the middle frame (3), and the inner cavity and the shaft body of the rotating shaft (43) are movably matched, so that the reduction motor (41) drives the radial rotating rod (42) to rotate, thereby driving the rotating shaft (43) to move in a circle, so that the strip frame (44) reciprocates or swings, thereby realizing the reciprocating movement of the middle frame (3).

4. The flame heating device for welding thick plate drum welds according to claim 3 is characterized in that: The strip frame (44) is arranged vertically and is correspondingly fixed to the middle frame (3).

5. The flame heating equipment for welding thick plate drum welds according to claim 3 is characterized in that: One end of the strip frame (44) is hinged to the bottom frame (1) and is movably connected to the middle frame (3) via a movable shaft (45) that passes through its inner cavity.

6. The flame heating equipment for welding thick plate drum welds according to claim 1 is characterized in that: The adjusting device (7) comprises a screw rod (71), the lower end of which is rotatably connected to the middle frame (3), and the upper end of which passes through the top frame (6) and is threadably engaged therewith.

7. The flame heating equipment for welding thick plate drum welds according to claim 1 is characterized in that: The adjusting device (7) comprises a screw rod (71) and a pressing nut (72); the lower end of the screw rod (71) is fixedly connected to the middle frame (3) and the upper end passes through the top frame (6); the pressing nut (72) is located below the top frame (6) and is threadably matched with the screw rod (71).

8. The flame heating equipment for welding thick plate drum welds according to claim 1 is characterized in that: The distance between two adjacent flame guns (8) on the same side is 450-550 mm, and the distance between two rows of flame guns (8) is 160-180 mm.

9. The flame heating equipment for welding thick plate drum welds according to claim 1 is characterized in that: The longitudinal movement stroke of the middle frame (3) is smaller than the distance between two adjacent flame guns (8) on the same side.

10. The flame heating equipment for welding thick plate drum welds according to claim 1, characterized in that: The infrared thermometer (9) is located in the middle of two flame guns (8) adjacent to each other in the longitudinal direction.

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