Steel pipe welding clamping device

Abstract

The utility model relates to a steel pipe welding clamping device which comprises a base, the base comprises two longitudinal ground beams, two transverse end ground beams and four transverse middle ground beams are fixedly connected between the two longitudinal ground beams, the two transverse end ground beams are arranged at the two ends of the longitudinal ground beams, the top side of each transverse middle ground beam is fixedly connected with an L-shaped positioning block, and the top side of each transverse middle ground beam is fixedly connected with an L-shaped positioning block. Wherein the top wall of one longitudinal ground beam is fixedly connected with four groups of clamping mechanisms, each group of clamping mechanisms is matched with one L-shaped positioning block, each clamping mechanism comprises a mounting seat, the top side of each mounting seat is fixedly connected with a guide sliding sleeve, the guide sliding sleeves are transversely arranged and slidably provided with a transverse pushing and pressing rod in a penetrating mode, the rear ends of the transverse pushing and pressing rods are hinged to pressing swing rods, and the pressing swing rods are hinged to the top side of each mounting seat. The pressing swing rod is connected with the guide sliding sleeve through a connecting rod, and the two ends of the connecting rod are hinged to the pressing swing rod and the guide sliding sleeve respectively. According to the utility model, a larger gap can be prevented from being generated at the contact part of two sections of steel pipes to be welded, so that the welding precision of the two sections is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of welding clamping mechanisms, in particular to a steel pipe welding clamping device. Background Art

[0002] The welding of square cross-section steel pipes requires a clamping mechanism to splice the two ends of the steel pipes to be welded into one section, and then weld the two. For situations where the precision of the finished product after welding is high, in addition to positioning and clamping the steel pipe laterally, it is also necessary to position the end of the steel pipe to be welded. However, the steel pipe welding clamping device in the prior art only clamps the two sections of steel pipes to be welded laterally, but does not pre-tighten them in the length direction, which easily leads to a large gap at the contact between the two sections, resulting in insufficient welding precision. Utility Model Content

[0003] The utility model aims to provide a steel pipe welding clamping device, which can avoid a large gap between two sections of steel pipes to be welded, thereby ensuring the welding accuracy of the two sections.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A steel pipe welding clamping device, comprising a base, the base comprising two longitudinal beams, two transverse end beams and four transverse middle beams fixedly connected between the two longitudinal beams, the two transverse end beams are arranged at the two ends of the longitudinal beams, the top side of each of the transverse middle beams is fixedly connected to an L-shaped positioning block, the top wall of one of the longitudinal beams is fixedly connected to four groups of clamping mechanisms, each group of clamping mechanisms matches one of the L-shaped positioning blocks, the clamping mechanism comprises a mounting seat, the top side of the mounting seat is fixedly connected to a guide sleeve, the guide sleeve The sliding sleeve is arranged along the horizontal direction, and the guide sliding sleeve is slidably provided with a horizontal pushing rod, and the rear end of the horizontal pushing rod is hinged with a clamping rocker arm, and the clamping rocker arm is connected to the guide sliding sleeve through a connecting rod, and the two ends of the connecting rod are respectively hinged with the clamping rocker arm and the guide sliding sleeve, one of the horizontal end beams is fixedly connected with an end positioning plate, and the other horizontal end beam is hinged with a swing arm, and the end of the swing arm is fixedly connected with a movable positioning plate, and the movable positioning plate is threadedly connected with two screws, and the front end of the screw is rotatably provided with a positioning piece.

[0006] Specifically, the L-shaped positioning block includes a horizontal block and a vertical block. The horizontal block is fixedly connected to the top side of the horizontal middle ground beam. The vertical blocks are arranged in a longitudinal direction and are close to one of the longitudinal ground beams.

[0007] Specifically, the four transverse middle ground beams are arranged along the length direction of the longitudinal ground beam.

[0008] Specifically, each set of clamping mechanisms includes two clamping mechanisms, and the cross-sections where the two clamping mechanisms are located are located on both sides in the longitudinal direction of the vertical blocks that they match.

[0009] Specifically, the bottom end of the clamping rocker arm is U-shaped and forked, thereby forming two connecting arms, and both connecting arms are hinged to the outer end of the transverse pushing rod. A connecting rod is provided on both longitudinal sides of the guide sleeve, and both sides of the connecting rod are respectively hinged to the side wall of the guide sleeve and the connecting arm on their side.

[0010] Specifically, both longitudinal side walls of the guide sleeve are provided with limiting protrusions, and when the connecting rod swings until its lower edge abuts against the limiting protrusions, the connecting rod and the clamping rocker are in a straight line.

[0011] Specifically, a hinge seat is fixedly connected to the top of the other transverse end ground beam, and the top wall of the hinge seat is provided with a receiving groove arranged along the longitudinal direction. The swing arm is arranged in the receiving groove, and one end of the swing arm is hinged to the outer end of the groove wall of the receiving groove. Screw holes are provided on both sides of the top side of the inner end of the receiving groove, and the top wall of the hinge seat is threadedly connected with a locking plate.

[0012] Specifically, the front end of the screw rod is threadedly connected with an optical axis segment, the optical axis segment is rotatably inserted into the positioning sheet, and the front end of the optical axis segment is fixedly connected with a limit stopper.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] First, place the two square-section steel pipes to be welded end to end on the top wall of the horizontal block of the four L-shaped positioning blocks, so that the front end of the square-section steel pipe on the front side is against the end positioning plate, and then make the side walls of the two square-section steel pipes to be welded against the side walls of the corresponding vertical blocks. In this state, every two sets of clamping mechanisms match a square-section steel pipe to be welded.

[0015] Then, the two screws are rotated to move the positioning piece forward to abut against the rear end of the square-section steel pipe at the rear side, thereby forcing the front end of the square-section steel pipe at the rear side to be in close contact with the rear end of the square-section steel pipe at the front side, thereby closing the gap between the two.

[0016] Then, the clamping swing rod is swung downward, thereby driving the transverse push rod to move forward. By adjusting the length of the fine-tuning screw to extend outward, when the connecting rod swings to the point where its lower edge abuts against the limiting protrusion, the connecting rod and the clamping swing rod are in a straight line, and the transverse push rod moves forward to the fine-tuning screw to abut against the side wall of the square-section steel pipe, thereby clamping the square-section steel pipe together with the vertical block. Since the connecting rod and the clamping swing rod are in a straight line at this time, the clamping swing rod and the transverse push rod are in a self-locking state, so that the square-section steel pipe can be reliably clamped. At this time, the on-site manipulator can weld the contact point of the two square-section steel pipes. Due to the forward pushing effect of the positioning plate, the gap at the contact point of the two square-section steel pipes has been limited to the minimum state before being clamped by the transverse push rod, so that the welding accuracy of the gap at the contact point is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a three-dimensional view of a steel pipe welding clamping device;

[0019] Figure 2 for Figure 1 A partial view of

[0020] Figure 3 Another perspective view of the steel pipe welding clamping device;

[0021] Figure 4 for Figure 3 A partial view of

[0022] Figure 5 is a view of the screw;

[0023] Figure 6 is a view of the clamping mechanism;

[0024] Figure 7 It is a schematic diagram comparing the clamping mechanism in the clamped and non-clamped states.

[0025] In the figure:

[0026] 1. Longitudinal ground beam;

[0027] 2. Transverse end ground beam; 21. End positioning plate; 22. Swing arm; 23. Movable positioning plate; 24. Screw; 25. Positioning plate; 26. Articulated seat; 261. Accommodating groove; 27. Locking plate; 28. Optical axis section; 281. Limiting block;

[0028] 3. Horizontal middle ground beam; 31. L-shaped positioning block; 311. Horizontal block; 312. Vertical block;

[0029] 4. Clamping mechanism; 41. Mounting seat; 42. Guide sleeve; 421. Limiting convex block; 43. Transverse push rod; 431. Mounting nut; 432. Fine adjustment screw; 44. Pressing rocker; 441. Connecting arm; 45. Connecting rod;

[0030] 5. Square section steel pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0032] See Figures 1 to 4 A steel pipe welding clamping device includes a base, the base includes two longitudinal beams 1, and two transverse end beams 2 and four transverse middle beams 3 are fixedly connected between the two longitudinal beams 1. The two transverse end beams 2 are arranged at the two ends of the longitudinal beams 1. The top side of each transverse middle beam 3 is fixedly connected with an L-shaped positioning block 31 (see Figure 4 ), four sets of clamping mechanisms 4 are fixedly connected to the top wall of the left longitudinal ground beam 1, and each set of clamping mechanisms 4 is matched with an L-shaped positioning block 31.

[0033] See Figure 4 , Figure 6 The clamping mechanism 4 includes a mounting seat 41, a guide sleeve 42 is fixedly connected to the top side of the mounting seat 41, the guide sleeve 42 is arranged in the transverse direction, and a transverse push rod 43 is slidably penetrated by the guide sleeve 42. A mounting nut 431 is fixedly connected to the front end of the transverse push rod 43, and a fine-tuning screw 432 is threadedly connected to the mounting nut 431. A clamping swing rod 44 is hingedly connected to the rear end of the transverse push rod 43. The clamping swing rod 44 is connected to the guide sleeve 42 through a connecting rod 45, and the two ends of the connecting rod 45 are respectively hinged to the clamping swing rod 44 and the guide sleeve 42.

[0034] See Figures 1 to 4 The front end transverse end ground beam 2 is fixedly connected with an end positioning plate 21. The rear end transverse end ground beam 2 is hinged with a swing arm 22, the end of the swing arm 22 is fixedly connected with a movable positioning plate 23, the movable positioning plate 23 is threadedly connected with two screw rods 24, and the front end of the screw rod 24 is rotatably penetrated with a positioning piece 25.

[0035] Specifically, see Figure 3 , Figure 4The L-shaped positioning block 31 includes a horizontal block 311 and a vertical block 312. The horizontal block 311 is fixedly connected to the top side of the horizontal middle ground beam 3, and each vertical block 312 is arranged in the longitudinal direction, and each vertical block 312 is close to the longitudinal ground beam 1 on the right side.

[0036] Specifically, four transverse middle ground beams 3 are arranged along the length direction of the longitudinal ground beam 1 .

[0037] Specifically, see Figure 3 , Figure 4 Each set of clamping mechanisms 4 includes two clamping mechanisms 4 , and the cross section where the two clamping mechanisms 4 are located is located on both sides of the longitudinal direction of the vertical block 312 it matches.

[0038] Specifically, see Figure 6 The bottom end of the pressing rocker 44 is U-shaped and bifurcated, thereby forming two connecting arms 441, and the two connecting arms 441 are hinged to the outer end of the transverse pushing rod 43. A connecting rod 45 is provided on both longitudinal sides of the guide sleeve 42, and the two sides of the connecting rod 45 are respectively hinged to the side wall of the guide sleeve 42 and the connecting arm 441 on the side.

[0039] Specifically, see Figure 6 The longitudinal side walls of the guide sleeve 42 are both provided with limiting protrusions 421. When the connecting rod 45 swings to the point where its lower edge abuts against the limiting protrusions 421, the connecting rod 45 and the clamping swing rod 44 are in a straight line (see Figure 4 ).

[0040] Specifically, see Figure 4 The top of the rear end transverse end ground beam 2 is fixedly connected with a hinge seat 26, the top wall of the hinge seat 26 is provided with a receiving groove 261 arranged in the longitudinal direction, the swing arm 22 is arranged in the receiving groove 261, and the rear end of the swing arm 22 is hinged to the rear end of the groove wall of the receiving groove 261 (the hinge axis is Figure 4 The inner end of the receiving groove 261 has screw holes on both sides of the top side (not shown), and the top wall of the hinge seat 26 is threadedly connected with a locking plate 27.

[0041] Specifically, see Figure 4 , Figure 5 The front end of the screw rod 24 is threadedly connected with an optical axis section 28 , the optical axis section 28 is rotatably arranged in the positioning piece 25 , and the front end of the optical axis section 28 is fixedly connected with a limit stopper 281 .

[0042] The working principle of the utility model steel pipe welding clamping device is as follows:

[0043] First, place the two square-section steel pipes 5 to be welded end to end on the top wall of the horizontal block 311 of the four L-shaped positioning blocks 31, so that the front end of the square-section steel pipe 5 on the front side abuts against the end positioning plate 21, and then make the side walls of the two square-section steel pipes 5 to be welded abut against the side walls of the corresponding vertical blocks 312 (such as Figure 1As shown), in this state, every two sets of clamping mechanisms 4 are matched with a square-section steel pipe 5 to be welded.

[0044] Then, the two screw rods 24 are rotated to move the positioning piece 25 forward to abut against the rear end of the square section steel pipe 5 at the rear side, thereby forcing the front end of the square section steel pipe 5 at the rear side to be in close contact with the rear end of the square section steel pipe 5 at the front side, thereby closing the gap between the two.

[0045] Then, the clamping swing rod 44 is swung downward, thereby driving the lateral push rod 43 to move forward. By adjusting the extension length of the fine-tuning screw 432, when the connecting rod 45 swings to the point where its lower edge abuts against the limiting protrusion 421, the connecting rod 45 and the clamping swing rod 44 are in a straight line (see Figure 4 ), and the lateral push rod 43 moves forward to the fine adjustment screw 432 to press against the side wall of the square section steel pipe 5, thereby clamping the square section steel pipe 5 together with the vertical block 312. Since the connecting rod 45 and the clamping rocker 44 are in a straight line at this time (see Figure 4 ), the clamping rocker 44 and the transverse push rod 43 are in a self-locking state, so that the square-section steel pipe 5 can be reliably clamped. At this time, the on-site manipulator can weld the contact between the two square-section steel pipes 5. Due to the forward pushing action of the positioning piece 25, the gap between the two square-section steel pipes 5 at the contact is limited to the minimum state before being clamped by the transverse push rod 43, so that the welding accuracy of the gap at the contact is improved.

[0046] After welding is completed, the lateral push rod 43 can be moved back and reset by swinging the pressing swing rod 44 upwards, thereby. Then, the two screw rods 24 are rotated to move the positioning piece 25 back and reset, and the limit stopper 281 is used to limit the positioning piece 25 to prevent the positioning piece 25 from being separated from the optical axis section 28.

[0047] After the positioning piece 25 is moved back and reset, there is a gap between the front side of the positioning piece 25 and the rear end of the square-section steel pipe. At this time, the locking plate 27 is removed and the swing arm 22 can be swung to swing the movable positioning plate 23, the positioning piece 25 and the swing arm 22 backward together, thereby freeing up space at the rear end of the welded square-section steel pipe for lifting and transfer.

[0048] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A steel pipe welding clamping device, characterized in that: The invention comprises a base, wherein the base comprises two longitudinal ground beams (1), two transverse end ground beams (2) and four transverse middle ground beams (3) are fixedly connected between the two longitudinal ground beams (1), the two transverse end ground beams (2) are arranged at the two ends of the longitudinal ground beams (1), the top side of each transverse middle ground beam (3) is fixedly connected to an L-shaped positioning block (31), the top wall of one of the longitudinal ground beams (1) is fixedly connected to four groups of clamping mechanisms (4), each group of clamping mechanisms (4) is matched with one of the L-shaped positioning blocks (31), the clamping mechanisms (4) comprise a mounting seat (41), the top side of the mounting seat (41) is fixedly connected to a guide sleeve (42), the guide sleeve (42) is arranged in the transverse direction, and the guide sleeve (42) is fixedly connected to the top wall of the longitudinal ground beam (1). 2) A lateral pushing rod (43) is slidably provided, and a clamping rocker (44) is hingedly connected to the rear end of the lateral pushing rod (43), and the clamping rocker (44) is connected to the guide sleeve (42) through a connecting rod (45), and the two ends of the connecting rod (45) are respectively hingedly connected to the clamping rocker (44) and the guide sleeve (42), one of the lateral end ground beams (2) is fixedly connected to an end positioning plate (21), and the other lateral end ground beam (2) is hingedly connected to a swing arm (22), and the end of the swing arm (22) is fixedly connected to a movable positioning plate (23), and the movable positioning plate (23) is threadedly connected to two screws (24), and the front end of the screw (24) is rotatably provided with a positioning piece (25).

2. The steel pipe welding clamping device according to claim 1 is characterized in that: The L-shaped positioning block (31) comprises a transverse block (311) and a vertical block (312); the transverse block (311) is fixedly connected to the top side of the transverse middle ground beam (3); the vertical blocks (312) are arranged in a longitudinal direction, and each vertical block (312) is close to one of the longitudinal ground beams (1).

3. The steel pipe welding clamping device according to claim 1 is characterized in that: The four transverse middle ground beams (3) are arranged along the length direction of the longitudinal ground beam (1).

4. The steel pipe welding clamping device according to claim 2 is characterized in that: Each group of clamping mechanisms (4) comprises two clamping mechanisms (4), and the cross-sections where the two clamping mechanisms (4) are located are located on both sides in the longitudinal direction of the vertical block (312) to which they match.

5. The steel pipe welding clamping device according to claim 1 is characterized in that: The bottom end of the clamping rocker (44) is in a U-shaped fork shape, thereby forming two connecting arms (441), and the two connecting arms (441) are both hinged to the outer end of the transverse pushing rod (43). The two longitudinal sides of the guide sleeve (42) are each provided with a connecting rod (45), and the two sides of the connecting rod (45) are respectively hinged to the side wall of the guide sleeve (42) and the connecting arm (441) on the side where it is located.

6. The steel pipe welding clamping device according to claim 5 is characterized in that: Both longitudinal side walls of the guide sleeve (42) are provided with limiting protrusions (421). When the connecting rod (45) swings until its lower edge abuts against the limiting protrusions (421), the connecting rod (45) and the clamping swing rod (44) are in a straight line.

7. The steel pipe welding clamping device according to claim 1 is characterized in that: A hinge seat (26) is fixedly connected to the top of the other transverse end ground beam (2), and a top wall of the hinge seat (26) is provided with a receiving groove (261) arranged in the longitudinal direction. The swing arm (22) is arranged in the receiving groove (261), and one end of the swing arm (22) is hinged to the outer end of the groove wall of the receiving groove (261). Screw holes are provided on both sides of the top side of the inner end of the receiving groove (261), and a locking plate (27) is threadedly connected to the top wall of the hinge seat (26).

8. The steel pipe welding clamping device according to claim 1 is characterized in that: The front end of the screw rod (24) is threadedly connected to an optical axis section (28), the optical axis section (28) is rotatably inserted into the positioning sheet (25), and the front end of the optical axis section (28) is fixedly connected to a limit stopper (281).

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