Positioning mechanism for welding spiral welded pipe

Abstract

The utility model discloses a positioning mechanism for welding a spiral welded pipe. The positioning mechanism comprises a positioning mechanism body arranged on a convex column. The positioning mechanism comprises two cross arms and a positioning block, the two cross arms are symmetrically arranged on the side wall of the positioning block, a first fixed seat and a first sliding seat are arranged on side plates of the convex column correspondingly, the two ends of each cross arm are hinged to the first fixed seat and the first sliding seat correspondingly, and a second fixed seat and a second sliding seat are arranged on the side wall of the positioning block correspondingly; the other two ends of the cross arm are respectively hinged to the second fixed seat and the second sliding seat; the adjusting mechanism is used for adjusting the positioning radius; the adjusting mechanism comprises a first lead screw and a connecting plate used for driving the cross arm. The spiral welded pipe can be tightly supported and positioned from the interior of the pipeline, the outer wall of the pipeline is not covered, machining operation can be conveniently conducted on all positions of the outer wall of the pipeline, meanwhile, the positioning radius can be adjusted according to actual needs, and therefore the spiral welded pipe positioning device can adapt to spiral welded pipes with different calibers.

Description

Technical Field

[0001] The utility model relates to the technical field of spiral welded pipe positioning equipment, and particularly relates to a positioning mechanism for spiral welded pipe welding. Background Technique

[0002] A spiral welded pipe is made by rolling a low-carbon carbon structural steel or low-alloy structural steel strip into a pipe blank at a certain spiral angle (called the forming angle), and then welding the pipe seam. It can produce large-diameter steel pipes with relatively narrow strip steel. Its specifications are expressed by outer diameter * wall thickness. The welded pipe should ensure that the hydrostatic test, the tensile strength of the weld seam and the cold bending performance meet the regulations.

[0003] After retrieval, the Chinese patent application number is: CN202121191631.8, which discloses a positioning device for spiral welded pipe welding, including a bottom plate. A chute is opened on the inner surface of the middle end of the bottom plate. Sliders are slidably connected to both the left and right sides of the inner cavity of the chute. Fixing rods are fixedly connected to the tops of the sliders. Clamping arms are movably connected to the tops of the fixing rods. Connecting plates are fixedly connected to the middle parts of the outer sides of the fixing rods. Electric telescopic rods are fixedly connected to the outer sides of the tops of the connecting plates. The tops of the electric telescopic rods are movably connected to the lower ends of the outer sides of the clamping arms. Connecting blocks are fixedly connected to the bottoms of the sliders. A housing is fixedly connected to the middle end of the bottom of the bottom plate. A threaded rod is rotatably connected to the inner cavity of the housing. This utility model sets a driven shaft, sliders, connecting blocks and a threaded rod, achieving the purpose of good clamping effect, and solving the problem that the existing positioning device does not have the function of good clamping effect, resulting in not meeting people's usage requirements.

[0004] The above technical solution clamps and positions the pipeline from the outer wall of the spiral welded pipe. Such a positioning method causes a certain coverage of the outer wall of the pipeline by the positioning mechanism, and welding and other operations cannot be carried out in the covered area, which is not convenient for processing the spiral welded pipe. Therefore, we need to propose a positioning mechanism for spiral welded pipe welding. Content of the Utility Model

[0005] The purpose of the utility model is to provide a positioning mechanism for spiral welded pipe welding. The device has a simple structure and is easy to use. Through the cooperation of the positioning mechanism and the adjusting mechanism, it can tighten and position the spiral welded pipe from the inside of the pipeline, with zero coverage of the outer wall of the pipeline, which is convenient for processing each position of the outer wall of the pipeline. At the same time, it can also adjust the positioning radius according to actual needs, so as to adapt to spiral welded pipes of different calibers, so as to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A positioning mechanism for spiral welded pipe welding, including:

[0008] Main structure;

[0009] The main structure includes a base, and two groups of support plates are symmetrically arranged on both sides of the base. The support plates are in an inverted T shape, and convex columns are arranged on the outer walls of the upper ends of the support plates;

[0010] A positioning mechanism arranged on the convex column;

[0011] At least two groups of the positioning mechanisms are arranged on the outer wall of the convex column. The positioning mechanism includes cross arms and positioning blocks. Two groups of cross arms are symmetrically arranged on the side walls of the positioning blocks. The side plates of the convex column are respectively provided with a first fixed seat and a first sliding seat. The two ends of the cross arms are respectively hinged to the first fixed seat and the first sliding seat. Second fixed seats and second sliding seats are respectively arranged on the side walls of the positioning blocks, and the other two ends of the cross arms are respectively hinged to the second fixed seats and the second sliding seats;

[0012] An adjusting mechanism for adjusting the positioning radius;

[0013] The adjusting mechanism includes a first lead screw and a connecting plate for driving the cross arms. First side plates are symmetrically arranged on the convex column. The first lead screw is rotatably installed between the first side plates and is driven by a first motor. A first sliding seat is installed on the first lead screw. The connecting plate is located between two groups of first sliding seats on the same side wall of the convex column, and the first sliding seat is fixedly connected to the connecting plate.

[0014] Preferably, the outer wall of the positioning block is designed as an arc surface, and multiple groups of anti-slip strips are equidistantly distributed on the arc surface of the positioning block.

[0015] Preferably, a first chute is opened on the convex column, and the first sliding seat is slidably installed inside the first chute.

[0016] Preferably, a second chute corresponding to the first chute is opened on the side wall of the positioning block, and the second sliding seat is slidably installed inside the second chute.

[0017] Preferably, it further includes a variable distance mechanism for adjusting the distance between two groups of convex columns. The variable distance mechanism includes a second lead screw and a second motor. Four groups of second side plates are symmetrically arranged on the base. The second lead screw is rotatably installed between two groups of second side plates on the same side of the base and is driven by the second motor.

[0018] Preferably, the second lead screw includes two parts, the threads of the two parts of the second lead screw face in opposite directions, and second sliding seats are installed on both parts of the second lead screw.

[0019] Preferably, the two groups of second sliding seats are respectively fixedly connected to one ends of the two groups of support plates. A guide rod is arranged between two groups of second side plates on the other side of the convex column, and two groups of guide sleeves are slidably sleeved on the guide rod. The two groups of guide sleeves are respectively fixedly connected to the other ends of the two groups of support plates.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] In the present utility model, support plates are symmetrically arranged on a base, convex columns are arranged on the support plates, a positioning mechanism including a cross arm and a positioning block is arranged on the convex columns, and an adjusting mechanism including a first lead screw and a connecting plate is also arranged. The first lead screw is driven by a first motor and can drive the cross arm to lift or lower the positioning block. The device has a simple structure and is easy to use. Through the cooperation of the positioning mechanism and the adjusting mechanism, the spiral welded pipe can be tightly supported and positioned from the inside of the pipe, with zero coverage of the outer wall of the pipe, facilitating processing operations at various positions on the outer wall of the pipe. At the same time, the positioning radius can be adjusted according to actual needs, so as to adapt to spiral welded pipes of different calibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present utility model;

[0023] Figure 2 is a schematic structural diagram of the positioning mechanism of the present utility model;

[0024] Figure 3 is a schematic structural diagram of the variable pitch mechanism of the present utility model.

[0025] In the figure: 1, base; 2, support plate; 3, convex column; 4, positioning block; 5, cross arm; 6, first fixing seat; 7, second fixing seat; 8, first sliding seat; 9, second sliding seat; 10, first chute; 11, second chute; 12, connecting plate; 13, first side plate; 14, first lead screw; 15, first sliding block; 16, first motor; 17, anti-slip strip; 18, second side plate; 19, second lead screw; 20, guide sleeve; 21, second motor; 22, second sliding block; 23, guide rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figure 1-2 , the present utility model provides a technical solution:

[0028] A positioning mechanism for spiral welded pipe welding, comprising:

[0029] Main body structure; the main body structure includes a base 1, and two groups of support plates 2 are symmetrically arranged on both sides of the base 1. The support plates 2 are in an inverted T shape, and convex columns 3 are arranged on the outer walls of the upper ends of the support plates 2;

[0030] Positioning mechanism arranged on the convex columns 3; at least two groups of positioning mechanisms are arranged on the outer walls of the convex columns 3. The positioning mechanism includes cross arms 5 and positioning blocks 4. Two groups of cross arms 5 are symmetrically arranged on the side walls of the positioning blocks 4. First fixed seats 6 and first sliding seats 8 are respectively arranged on the side plates of the convex columns 3. The two ends of the cross arms 5 are respectively hinged to the first fixed seats 6 and the first sliding seats 8. Second fixed seats 7 and second sliding seats 9 are respectively arranged on the side walls of the positioning blocks 4. The other two ends of the cross arms 5 are respectively hinged to the second fixed seats 7 and the second sliding seats 9;

[0031] Adjusting mechanism for adjusting the positioning radius; the adjusting mechanism includes a first lead screw 14 and a connecting plate 12 for driving the cross arms 5. First side plates 13 are symmetrically arranged on the convex columns 3. The first lead screw 14 is rotatably installed between the first side plates 13, and the first lead screw 14 is driven by a first motor 16. A first sliding seat 15 is installed on the first lead screw 14. The connecting plate 12 is located between two groups of first sliding seats 8 on the same side wall of the convex column 3. The first sliding seat 15 is fixedly connected to the connecting plate 12. A first chute 10 is opened on the convex column 3, and the first sliding seat 8 is slidably installed inside the first chute 10. A second chute 11 corresponding to the first chute 10 is opened on the side wall of the positioning block 4, and the second sliding seat 9 is slidably installed inside the second chute 11.

[0032] By symmetrically arranging the support plates 2 on the base 1, arranging the convex columns 3 on the support plates 2, arranging the positioning mechanism including the cross arms 5 and the positioning blocks 4 on the convex columns 3, and also arranging the adjusting mechanism including the first lead screw 14 and the connecting plate 12, and the first lead screw 14 is driven by the first motor 16, which can drive the cross arms 5 to lift or lower the positioning blocks 4. During actual use, the convex columns 3 are inserted into the ports of the spiral welded pipes. Starting the first motor 16 to drive the first lead screw 14 to rotate can drive the first sliding seats 8 at both ends of the connecting plate 12 to slide in the first chutes 10 on the convex columns 3, so that the cross arms 5 are deformed. Therefore, the positioning blocks 4 can be lifted or contracted until the outer walls of the positioning blocks 4 are tightened against the inner walls of the pipes, thus playing a role in positioning the spiral pipes;

[0033] Since the pipes are positioned from the inside of the pipes, the staff can perform comprehensive processing operations on the outer walls of the pipes without processing dead corners. At the same time, due to the design of the adjusting mechanism, the lifting amplitude of the positioning blocks 4 can be adjusted according to the diameter of the spiral welded pipes, thus greatly improving the applicability of the device.

[0034] Among them, at least two sets of positioning mechanisms are symmetrically arranged on two opposite sides of the convex column 3. According to actual needs, positioning mechanisms can also be arranged on all four sides of the convex column 3 to improve the positioning strength.

[0035] In addition, please refer to Figure 1-2 :

[0036] The outer wall of the positioning block 4 is designed with an arc surface, and multiple groups of anti-slip strips 17 are equidistantly distributed on the arc surface of the positioning block 4.

[0037] By setting the outer wall of the positioning block 4 as an arc surface with anti-slip strips 17, when positioning the pipeline, it can better fit the inner wall of the pipeline, and also has a good anti-slip effect, improving the fastening degree of the pipeline positioning.

[0038] Please refer to Figure 1 and Figure 3 , in order to enable the device to adapt to spiral welded pipes of different lengths, the following design is made in this application:

[0039] It also includes a variable-spacing mechanism for adjusting the distance between two groups of convex columns 3. The variable-spacing mechanism includes a second lead screw 19 and a second motor 21. Four groups of second side plates 18 are symmetrically arranged on the base 1. The second lead screw 19 is rotatably installed between two groups of second side plates 18 on the same side of the base 1, and the second lead screw 19 is driven by the second motor 21. The second lead screw 19 includes two parts, and the threads of the two parts of the second lead screw 19 are in opposite directions. Second sliding seats 22 are installed on both parts of the second lead screw 19. The two groups of second sliding seats 22 are respectively fixedly connected to one end of two groups of support plates 2. A guide rod 23 is arranged between the two groups of second side plates 18 on the other side of the convex column 3. Two groups of guide sleeves 20 are slidably sleeved on the guide rod 23, and the two groups of guide sleeves 20 are respectively fixedly connected to the other end of the two groups of support plates 2.

[0040] By arranging the second side plates 18 on the base 1, and arranging the second lead screw 19 driven by the second motor 21 between the second side plates 18, and the threads of the two parts of the second lead screw 19 are in opposite directions, so the two groups of second sliding seats 22 can drive the two groups of support plates 2 to move closer or farther apart, thereby being able to adjust the distance between the two groups of convex columns 3, and further improving the application range of the device.

[0041] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A spiral welded pipe welding positioning mechanism, characterized in that: include: Main structure; The main structure comprises a base (1), two groups of support plates (2) are symmetrically arranged on both sides of the base (1), the support plates (2) are in an inverted T-shape, and a convex column (3) is arranged on the outer wall of the upper end of the support plate (2); A positioning mechanism arranged on the boss (3); The positioning mechanism is provided with at least two groups on the outer wall of the boss (3), and the positioning mechanism comprises a cross arm (5) and a positioning block (4). The cross arm (5) is symmetrically provided with two groups on the side wall of the positioning block (4). The side plates of the boss (3) are provided with a first fixed seat (6) and a first sliding seat (8), respectively. The two ends of the cross arm (5) are respectively hinged to the first fixed seat (6) and the first sliding seat (8). The side walls of the positioning block (4) are provided with a second fixed seat (7) and a second sliding seat (9), respectively. The other two ends of the cross arm (5) are respectively hinged to the second fixed seat (7) and the second sliding seat (9). An adjustment mechanism for adjusting the positioning radius; The adjustment mechanism comprises a first screw rod (14) and a connecting plate (12) for driving the cross arm (5); the first side plates (13) are symmetrically arranged on the boss (3); the first screw rod (14) is rotatably mounted between the first side plates (13); the first screw rod (14) is driven by a first motor (16); a first slide seat (15) is mounted on the first screw rod (14); the connecting plate (12) is located between two groups of first slide seats (8) on the same side wall of the boss (3); and the first slide seat (15) is fixedly connected to the connecting plate (12).

2. A spiral welded pipe welding positioning mechanism according to claim 1, characterized in that: The outer wall of the positioning block (4) is designed to be an arc surface, and a plurality of groups of anti-slip strips (17) are evenly distributed on the arc surface of the positioning block (4).

3. The spiral welded pipe welding positioning mechanism according to claim 1, characterized in that: The convex column (3) is provided with a first sliding groove (10), and the first sliding seat (8) is slidably mounted inside the first sliding groove (10).

4. A spiral welded pipe welding positioning mechanism according to claim 3, characterized in that: The side wall of the positioning block (4) is provided with a second sliding groove (11) corresponding to the first sliding groove (10), and the second sliding seat (9) is slidably mounted inside the second sliding groove (11).

5. The spiral welded pipe welding positioning mechanism according to claim 1, characterized in that: It also includes a pitch-changing mechanism for adjusting the distance between the two groups of bosses (3), the pitch-changing mechanism including a second screw rod (19) and a second motor (21), four groups of second side plates (18) are symmetrically arranged on the base (1), the second screw rod (19) is rotatably mounted between two groups of second side plates (18) located on the same side of the base (1), and the second screw rod (19) is driven by the second motor (21).

6. A spiral welded pipe welding positioning mechanism according to claim 5, characterized in that: The second screw rod (19) comprises two parts, the threads of the two parts of the second screw rod (19) are oriented in opposite directions, and a second slide seat (22) is mounted on both parts of the second screw rod (19).

7. A spiral welded pipe welding positioning mechanism according to claim 6, characterized in that: The two groups of the second slide seats (22) are respectively fixedly connected to one end of the two groups of support plates (2); a guide rod (23) is provided between the two groups of second side plates (18) on the other side of the protruding column (3); two groups of guide sleeves (20) are slidably sleeved on the guide rod (23); and the two groups of guide sleeves (20) are respectively fixedly connected to the other end of the two groups of support plates (2).

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